[edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase

Dandan Bi posted 8 patches 6 years, 10 months ago
There is a newer version of this series
[edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Dandan Bi 6 years, 10 months ago
V2:
Update DxecorePerformanceLib to report the boot performance table
address instead of records contents.

Updated to convert Pref entry to FPDT record in DXE phase and then
allocate boot performance table to save the record and report
the address of boot performance table to FirmwarePerformanceDxe.

Cc: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
---
 .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
 .../DxeCorePerformanceLib.inf                      |   20 +-
 .../DxeCorePerformanceLibInternal.h                |   17 +-
 3 files changed, 1108 insertions(+), 318 deletions(-)

diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
index 7c0e207..c6f8a16 100644
--- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
+++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
@@ -8,11 +8,11 @@
   which are consumed by DxePerformanceLib to logging performance data in DXE phase.
 
   This library is mainly used by DxeCore to start performance logging to ensure that
   Performance Protocol is installed at the very beginning of DXE phase.
 
-Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
 http://opensource.org/licenses/bsd-license.php
@@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 **/
 
 
 #include "DxeCorePerformanceLibInternal.h"
 
-
 //
-// The data structure to hold global performance data.
+// Data for FPDT performance records.
 //
-GAUGE_DATA_HEADER    *mGaugeData;
+#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
+#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
+#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
+#define FIRMWARE_RECORD_BUFFER  0x10000
+#define CACHE_HANDLE_GUID_COUNT 0x1000
+
+BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
+BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
+  {
+    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
+    sizeof (BOOT_PERFORMANCE_TABLE)
+  },
+  {
+    {
+      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
+      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
+      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
+    },
+    0,  // Reserved
+    //
+    // These values will be updated at runtime.
+    //
+    0,  // ResetEnd
+    0,  // OsLoaderLoadImageStart
+    0,  // OsLoaderStartImageStart
+    0,  // ExitBootServicesEntry
+    0   // ExitBootServicesExit
+  }
+};
 
-//
-// The current maximum number of logging entries. If current number of 
-// entries exceeds this value, it will re-allocate a larger array and
-// migration the old data to the larger array.
-//
-UINT32               mMaxGaugeRecords;
+typedef struct {
+  EFI_HANDLE    Handle;
+  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
+  EFI_GUID      ModuleGuid;
+} HANDLE_GUID_MAP;
 
-//
-// The handle to install Performance Protocol instance.
-//
-EFI_HANDLE           mHandle = NULL;
+HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
+UINTN           mCachePairCount = 0;
+
+UINT32  mLoadImageCount       = 0;
+UINT32  mPerformanceLength    = 0;
+UINT32  mMaxPerformanceLength = 0;
+UINT32  mBootRecordSize       = 0;
+UINT32  mBootRecordMaxSize    = 0;
+
+BOOLEAN mFpdtBufferIsReported = FALSE;
+BOOLEAN mLackSpaceIsReported  = FALSE;
+CHAR8   *mPlatformLanguage    = NULL;
+UINT8   *mPerformancePointer  = NULL;
+UINT8   *mBootRecordBuffer    = NULL;
+
+EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
 
 //
 // Interfaces for Performance Protocol.
 //
 PERFORMANCE_PROTOCOL mPerformanceInterface = {
@@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
   GetGaugeEx
   };
 
 PERFORMANCE_PROPERTY  mPerformanceProperty;
 
-//
-//  Gauge record lock to avoid data corruption or even memory overflow
-//
-STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
+/**
+Check whether the Token is a known one which is uesed by core.
+
+@param  Token      Pointer to a Null-terminated ASCII string
+
+@retval TRUE       Is a known one used by core.
+@retval FALSE      Not a known one.
+
+**/
+BOOLEAN
+IsKnownTokens (
+  IN CONST CHAR8  *Token
+  )
+{
+  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
+      AsciiStrCmp (Token, PEI_TOK) == 0 ||
+      AsciiStrCmp (Token, DXE_TOK) == 0 ||
+      AsciiStrCmp (Token, BDS_TOK) == 0 ||
+      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
+      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
+      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
+      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
+      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
+      AsciiStrCmp (Token, PEIM_TOK) == 0) {
+    return TRUE;
+  } else {
+    return FALSE;
+  }
+}
+
+/**
+Check whether the ID is a known one which map to the known Token.
+
+@param  Identifier  32-bit identifier.
+
+@retval TRUE        Is a known one used by core.
+@retval FALSE       Not a known one.
+
+**/
+BOOLEAN
+IsKnownID (
+  IN UINT32       Identifier
+  )
+{
+  if (Identifier == MODULE_START_ID ||
+      Identifier == MODULE_END_ID ||
+      Identifier == MODULE_LOADIMAGE_START_ID ||
+      Identifier == MODULE_LOADIMAGE_END_ID ||
+      Identifier == MODULE_DB_START_ID ||
+      Identifier == MODULE_DB_END_ID ||
+      Identifier == MODULE_DB_SUPPORT_START_ID ||
+      Identifier == MODULE_DB_SUPPORT_END_ID ||
+      Identifier == MODULE_DB_STOP_START_ID ||
+      Identifier == MODULE_DB_STOP_END_ID) {
+    return TRUE;
+  } else {
+    return FALSE;
+  }
+}
 
 /**
-  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
+  Allocate EfiReservedMemoryType below 4G memory address.
+
+  This function allocates EfiReservedMemoryType below 4G memory address.
+
+  @param[in]  Size   Size of memory to allocate.
+
+  @return Allocated address for output.
+
+**/
+VOID *
+FpdtAllocateReservedMemoryBelow4G (
+  IN UINTN       Size
+  )
+{
+  UINTN                 Pages;
+  EFI_PHYSICAL_ADDRESS  Address;
+  EFI_STATUS            Status;
+  VOID                  *Buffer;
+
+  Buffer  = NULL;
+  Pages   = EFI_SIZE_TO_PAGES (Size);
+  Address = 0xffffffff;
+
+  Status = gBS->AllocatePages (
+                  AllocateMaxAddress,
+                  EfiReservedMemoryType,
+                  Pages,
+                  &Address
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  if (!EFI_ERROR (Status)) {
+    Buffer = (VOID *) (UINTN) Address;
+    ZeroMem (Buffer, Size);
+  }
+
+  return Buffer;
+}
+
+/**
+  Allocate buffer for Boot Performance table.
+
+  @return Status code.
+
+**/
+EFI_STATUS
+AllocateBootPerformanceTable (
+  )
+{
+  EFI_STATUS                    Status;
+  UINTN                         Size;
+  UINT8                         *SmmBootRecordCommBuffer;
+  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
+  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
+  UINTN                         CommSize;
+  UINTN                         BootPerformanceDataSize;
+  UINT8                         *BootPerformanceData;
+  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
+  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
+  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
+  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
+  UINTN                         Index;
+  VOID                          *SmmBootRecordData;
+  UINTN                         SmmBootRecordDataSize;
+  UINTN                         ReservedMemSize;
+
+  //
+  // Collect boot records from SMM drivers.
+  //
+  SmmBootRecordCommBuffer = NULL;
+  SmmCommData             = NULL;
+  SmmBootRecordData       = NULL;
+  SmmBootRecordDataSize   = 0;
+  ReservedMemSize         = 0;
+  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
+  if (!EFI_ERROR (Status)) {
+    //
+    // Initialize communicate buffer
+    // Get the prepared Reserved Memory Range
+    //
+    Status = EfiGetSystemConfigurationTable (
+              &gEdkiiPiSmmCommunicationRegionTableGuid,
+              (VOID **) &SmmCommRegionTable
+              );
+    if (!EFI_ERROR (Status)) {
+      ASSERT (SmmCommRegionTable != NULL);
+      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
+      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
+        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
+          break;
+        }
+        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
+      }
+      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
+      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
+      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
+      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
+
+      //
+      // Check enough reserved memory space
+      //
+      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
+        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
+        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
+        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
+        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
+
+        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
+        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
+        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
+
+        //
+        // Get the size of boot records.
+        //
+        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
+        SmmCommData->BootRecordData = NULL;
+        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
+        ASSERT_EFI_ERROR (Status);
+
+        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
+          //
+          // Get all boot records
+          //
+          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
+          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
+          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
+          ASSERT (SmmBootRecordData  != NULL);
+          SmmCommData->BootRecordOffset = 0;
+          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
+          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
+          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
+            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
+            ASSERT_EFI_ERROR (Status);
+            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
+            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
+              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
+            } else {
+              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
+            }
+            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
+          }
+        }
+      }
+    }
+  }
+
+  //
+  // Prepare memory for Boot Performance table.
+  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
+  //
+  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
+  if (SmmCommData != NULL) {
+    BootPerformanceDataSize += SmmBootRecordDataSize;
+  }
+
+  //
+  // Try to allocate the same runtime buffer as last time boot.
+  //
+  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
+  Size = sizeof (PerformanceVariable);
+  Status = gRT->GetVariable (
+                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
+                  &gEfiFirmwarePerformanceGuid,
+                  NULL,
+                  &Size,
+                  &PerformanceVariable
+                  );
+  if (!EFI_ERROR (Status)) {
+    Status = gBS->AllocatePages (
+                    AllocateAddress,
+                    EfiReservedMemoryType,
+                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
+                    &PerformanceVariable.BootPerformanceTablePointer
+                    );
+    if (!EFI_ERROR (Status)) {
+      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
+    }
+  }
+
+  if (mAcpiBootPerformanceTable == NULL) {
+    //
+    // Fail to allocate at specified address, continue to allocate at any address.
+    //
+    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);
+  }
+  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
+
+  if (mAcpiBootPerformanceTable == NULL) {
+    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
+      FreePool (SmmBootRecordData);
+    }
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  //
+  // Prepare Boot Performance Table.
+  //
+  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
+  //
+  // Fill Basic Boot record to Boot Performance Table.
+  //
+  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
+  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
+  //
+  // Fill Boot records from boot drivers.
+  //
+  if (mPerformancePointer != NULL) {
+    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
+    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
+    BootPerformanceData = BootPerformanceData + mPerformanceLength;
+  }
+  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
+    //
+    // Fill Boot records from SMM drivers.
+    //
+    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
+    FreePool (SmmBootRecordData);
+    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
+    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
+  }
+
+  //
+  // Save Boot Performance Table address to Variable for use in S4 resume.
+  //
+  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
+
+  //
+  // Save Runtime Performance Table pointers to Variable.
+  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
+  //
+  gRT->SetVariable (
+        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
+        &gEfiFirmwarePerformanceGuid,
+        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+        sizeof (PerformanceVariable),
+        &PerformanceVariable
+        );
+
+  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
+  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
+  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Get a human readable module name and module guid for the given image handle.
+  If module name can't be found, "" string will return.
+  If module guid can't be found, Zero Guid will return.
+
+  @param    Handle        Image handle or Controller handle.
+  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
+  @param    BufferSize    Size of the input NameString buffer.
+  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
+
+  @retval EFI_SUCCESS     Successfully get module name and guid.
+  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
+  @retval other value  Module Name can't be got.
+**/
+EFI_STATUS
+GetModuleInfoFromHandle (
+  IN EFI_HANDLE  Handle,
+  OUT CHAR8            *NameString,
+  IN UINTN             BufferSize,
+  OUT EFI_GUID         *ModuleGuid OPTIONAL
+  )
+{
+  EFI_STATUS                  Status;
+  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
+  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
+  CHAR8                       *PdbFileName;
+  EFI_GUID                    *TempGuid;
+  UINTN                       StartIndex;
+  UINTN                       Index;
+  INTN                        Count;
+  BOOLEAN                     ModuleGuidIsGet;
+  UINTN                       StringSize;
+  CHAR16                      *StringPtr;
+  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
+  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
+
+  if (NameString == NULL || BufferSize == 0) {
+    return EFI_INVALID_PARAMETER;
+  }
+  //
+  // Try to get the ModuleGuid and name string form the caached array.
+  //
+  if (mCachePairCount > 0) {
+    for (Count = mCachePairCount -1; Count >= 0; Count--) {
+      if (Handle == mCacheHandleGuidTable[Count].Handle) {
+        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
+        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
+        return EFI_SUCCESS;
+      }
+    }
+  }
+
+  Status = EFI_INVALID_PARAMETER;
+  LoadedImage     = NULL;
+  ModuleGuidIsGet = FALSE;
+
+  //
+  // Initialize GUID as zero value.
+  //
+  TempGuid    = &gZeroGuid;
+  //
+  // Initialize it as "" string.
+  //
+  NameString[0] = 0;
+
+  if (Handle != NULL) {
+    //
+    // Try Handle as ImageHandle.
+    //
+    Status = gBS->HandleProtocol (
+                  Handle,
+                  &gEfiLoadedImageProtocolGuid,
+                  (VOID**) &LoadedImage
+                  );
+
+    if (EFI_ERROR (Status)) {
+      //
+      // Try Handle as Controller Handle
+      //
+      Status = gBS->OpenProtocol (
+                    Handle,
+                    &gEfiDriverBindingProtocolGuid,
+                    (VOID **) &DriverBinding,
+                    NULL,
+                    NULL,
+                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
+                    );
+      if (!EFI_ERROR (Status)) {
+        //
+        // Get Image protocol from ImageHandle
+        //
+        Status = gBS->HandleProtocol (
+                      DriverBinding->ImageHandle,
+                      &gEfiLoadedImageProtocolGuid,
+                      (VOID**) &LoadedImage
+                      );
+      }
+    }
+  }
+
+  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
+    //
+    // Get Module Guid from DevicePath.
+    //
+    if (LoadedImage->FilePath != NULL &&
+        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
+        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
+       ) {
+      //
+      // Determine GUID associated with module logging performance
+      //
+      ModuleGuidIsGet = TRUE;
+      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
+      TempGuid        = &FvFilePath->FvFileName;
+    }
+
+    //
+    // Method 1 Get Module Name from PDB string.
+    //
+    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
+    if (PdbFileName != NULL && BufferSize > 0) {
+      StartIndex = 0;
+      for (Index = 0; PdbFileName[Index] != 0; Index++) {
+        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
+          StartIndex = Index + 1;
+        }
+      }
+      //
+      // Copy the PDB file name to our temporary string.
+      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
+      //
+      for (Index = 0; Index < BufferSize - 1; Index++) {
+        NameString[Index] = PdbFileName[Index + StartIndex];
+        if (NameString[Index] == 0 || NameString[Index] == '.') {
+          NameString[Index] = 0;
+          break;
+        }
+      }
 
-  This internal function searches for the gauge entry in the gauge array.
-  If there is an entry that exactly matches the given keywords
-  and its end time stamp is zero, then the index of that gauge entry is returned;
-  otherwise, the the number of gauge entries in the array is returned.
+      if (Index == BufferSize - 1) {
+        NameString[Index] = 0;
+      }
+      //
+      // Module Name is got.
+      //
+      goto Done;
+    }
+  }
 
+  //
+  // Method 2: Get the name string from ComponentName2 protocol
+  //
+  Status = gBS->HandleProtocol (
+                  Handle,
+                  &gEfiComponentName2ProtocolGuid,
+                  (VOID **) &ComponentName2
+                  );
+  if (!EFI_ERROR (Status)) {
+    //
+    // Get the current platform language setting
+    //
+    if (mPlatformLanguage == NULL) {
+      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
+    }
+    if (mPlatformLanguage != NULL) {
+      Status = ComponentName2->GetDriverName (
+                                 ComponentName2,
+                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
+                                 &StringPtr
+                                 );
+      if (!EFI_ERROR (Status)) {
+        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
+          NameString[Index] = (CHAR8) StringPtr[Index];
+        }
+        NameString[Index] = 0;
+        //
+        // Module Name is got.
+        //
+        goto Done;
+      }
+    }
+  }
+
+  if (ModuleGuidIsGet) {
+    //
+    // Method 3 Try to get the image's FFS UI section by image GUID
+    //
+    StringPtr  = NULL;
+    StringSize = 0;
+    Status = GetSectionFromAnyFv (
+              TempGuid,
+              EFI_SECTION_USER_INTERFACE,
+              0,
+              (VOID **) &StringPtr,
+              &StringSize
+              );
+
+    if (!EFI_ERROR (Status)) {
+      //
+      // Method 3. Get the name string from FFS UI section
+      //
+      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
+        NameString[Index] = (CHAR8) StringPtr[Index];
+      }
+      NameString[Index] = 0;
+      FreePool (StringPtr);
+    }
+  }
+
+Done:
+  //
+  // Copy Module Guid
+  //
+  if (ModuleGuid != NULL) {
+    CopyGuid (ModuleGuid, TempGuid);
+    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
+        // Handle is GUID
+      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
+    }
+  }
+
+  //
+  // Cache the Handle and Guid pairs.
+  //
+  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
+    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
+    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
+    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
+    mCachePairCount ++;
+  }
+
+  return Status;
+}
+
+/**
+  Get the FPDT record info.
+
+  @param  IsStart                 TRUE if the performance log is start log.
   @param  Handle                  Pointer to environment specific context used
                                   to identify the component being measured.
   @param  Token                   Pointer to a Null-terminated ASCII string
                                   that identifies the component being measured.
   @param  Module                  Pointer to a Null-terminated ASCII string
                                   that identifies the module being measured.
-  @param  Identifier              32-bit identifier.
+  @param  RecordInfo              On return, pointer to the info of the record.
+  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
+                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
 
-  @retval The index of gauge entry in the array.
+  @retval EFI_SUCCESS          Get record info successfully.
+  @retval EFI_UNSUPPORTED      No matched FPDT record.
 
 **/
-UINT32
-InternalSearchForGaugeEntry (
-  IN CONST VOID                 *Handle,  OPTIONAL
-  IN CONST CHAR8                *Token,   OPTIONAL
-  IN CONST CHAR8                *Module,   OPTIONAL
-  IN UINT32                     Identifier
+EFI_STATUS
+GetFpdtRecordInfo (
+  IN BOOLEAN                  IsStart,
+  IN CONST VOID               *Handle,
+  IN CONST CHAR8              *Token,
+  IN CONST CHAR8              *Module,
+  OUT BASIC_RECORD_INFO       *RecordInfo,
+  IN OUT BOOLEAN              *UseModuleName
   )
 {
-  UINT32                    Index;
-  UINT32                    Index2;
-  UINT32                    NumberOfEntries;
-  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
+  UINT16              RecordType;
+  UINTN               StringSize;
 
-  if (Token == NULL) {
-    Token = "";
-  }
-  if (Module == NULL) {
-    Module = "";
+  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
+
+  //
+  // Token to Type and Id.
+  //
+  if (Token != NULL) {
+    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
+      *UseModuleName = TRUE;
+      RecordType     = GUID_EVENT_TYPE;
+      if (IsStart) {
+        RecordInfo->ProgressID  = MODULE_START_ID;
+      } else {
+        RecordInfo->ProgressID  = MODULE_END_ID;
+      }
+    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
+      *UseModuleName = TRUE;
+      RecordType = GUID_QWORD_EVENT_TYPE;
+      if (IsStart) {
+        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
+      } else {
+        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
+      }
+    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
+      *UseModuleName = TRUE;
+      if (IsStart) {
+        RecordInfo->ProgressID  = MODULE_DB_START_ID;
+        RecordType   = GUID_QWORD_EVENT_TYPE;
+      } else {
+        RecordInfo->ProgressID  = MODULE_DB_END_ID;
+        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
+      }
+    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
+      *UseModuleName = TRUE;
+      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
+        return RETURN_UNSUPPORTED;
+      }
+      RecordType     = GUID_QWORD_EVENT_TYPE;
+      if (IsStart) {
+        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
+      } else {
+        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
+      }
+    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
+      *UseModuleName = TRUE;
+      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
+         return RETURN_UNSUPPORTED;
+      }
+      RecordType     = GUID_QWORD_EVENT_TYPE;
+      if (IsStart) {
+        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
+      } else {
+        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
+      }
+    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
+               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
+               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
+      if (IsStart) {
+        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
+      } else {
+        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
+      }
+    } else {                                                          // Pref used in Modules.
+      if (IsStart) {
+        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
+      } else {
+        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
+      }
+    }
+  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
+    if (IsStart) {
+      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
+    } else {
+      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
+    }
+  } else {
+    return EFI_UNSUPPORTED;
   }
 
-  NumberOfEntries = mGaugeData->NumberOfEntries;
-  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
+  //
+  // Get Record size baesed on the record type.
+  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
+  //
+  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
+    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
+    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
+  } else {
+    switch (RecordType) {
+    case GUID_EVENT_TYPE:
+      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
+      break;
 
-  Index2 = 0;
+    case DYNAMIC_STRING_EVENT_TYPE:
+      if (*UseModuleName) {
+        StringSize  = STRING_SIZE;
+      } else if (Token  != NULL) {
+        StringSize  = AsciiStrSize (Token);
+      } else if (Module != NULL) {
+        StringSize  = AsciiStrSize (Module);
+      } else {
+        StringSize  = STRING_SIZE;
+      }
+      if (StringSize > STRING_SIZE) {
+        StringSize   = STRING_SIZE;
+      }
+      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
+      break;
 
-  for (Index = 0; Index < NumberOfEntries; Index++) {
-    Index2 = NumberOfEntries - 1 - Index;
-    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
-        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
-        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
-        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
-      Index = Index2;
+    case GUID_QWORD_EVENT_TYPE:
+      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
       break;
+
+    case GUID_QWORD_STRING_EVENT_TYPE:
+      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
+      break;
+
+    default:
+      //
+      // Record is unsupported yet, return EFI_UNSUPPORTED
+      //
+      return EFI_UNSUPPORTED;
     }
   }
 
-  return Index;
+  RecordInfo->Type = RecordType;
+  return EFI_SUCCESS;
 }
 
 /**
-  Adds a record at the end of the performance measurement log
-  that records the start time of a performance measurement.
-
-  Adds a record to the end of the performance measurement log
-  that contains the Handle, Token, Module and Identifier.
-  The end time of the new record must be set to zero.
-  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
-  If TimeStamp is zero, the start time in the record is filled in with the value
-  read from the current time stamp.
+  Add performance log to FPDT boot record table.
 
+  @param  IsStart                 TRUE if the performance log is start log.
   @param  Handle                  Pointer to environment specific context used
                                   to identify the component being measured.
   @param  Token                   Pointer to a Null-terminated ASCII string
                                   that identifies the component being measured.
   @param  Module                  Pointer to a Null-terminated ASCII string
                                   that identifies the module being measured.
-  @param  TimeStamp               64-bit time stamp.
+  @param  Ticker                  64-bit time stamp.
   @param  Identifier              32-bit identifier. If the value is 0, the created record
                                   is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
 
-  @retval EFI_SUCCESS             The data was read correctly from the device.
+  @retval EFI_SUCCESS             Add FPDT boot record.
   @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
+  @retval EFI_UNSUPPORTED         No matched FPDT record.
 
 **/
 EFI_STATUS
-EFIAPI
-StartGaugeEx (
+InsertFpdtMeasurement (
+  IN BOOLEAN      IsStart,
   IN CONST VOID   *Handle,  OPTIONAL
   IN CONST CHAR8  *Token,   OPTIONAL
   IN CONST CHAR8  *Module,  OPTIONAL
-  IN UINT64       TimeStamp,
+  IN UINT64       Ticker,
   IN UINT32       Identifier
   )
 {
-  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
-  UINTN                     GaugeDataSize;
-  GAUGE_DATA_HEADER         *NewGaugeData;
-  UINTN                     OldGaugeDataSize;
-  GAUGE_DATA_HEADER         *OldGaugeData;
-  UINT32                    Index;
-  EFI_STATUS                Status;
+  EFI_GUID                     ModuleGuid;
+  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
+  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
+  EFI_STATUS                   Status;
+  FPDT_RECORD_PTR              FpdtRecordPtr;
+  BASIC_RECORD_INFO            RecordInfo;
+  UINT64                       TimeStamp;
+  UINTN                        DestMax;
+  UINTN                        StrLength;
+  CONST CHAR8                  *StringPtr;
+  BOOLEAN                      UseModuleName;
+
+  StringPtr     = NULL;
+  UseModuleName = FALSE;
+  ZeroMem (ModuleName, sizeof (ModuleName));
+  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
 
-  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
+  //
+  // Get record info (type, size, ProgressID and Module Guid).
+  //
+  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
   if (EFI_ERROR (Status)) {
     return Status;
   }
 
-  Index = mGaugeData->NumberOfEntries;
-  if (Index >= mMaxGaugeRecords) {
+  //
+  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
+  // !!! Note: If the Pref is not the known Token used in the core but have same
+  // ID with the core Token, this case will not be supported.
+  // And in currtnt usage mode, for the unkown ID, there is a general rule:
+  // If it is start pref: the lower 4 bits of the ID should be 0.
+  // If it is end pref: the lower 4 bits of the ID should not be 0.
+  // If input ID doesn't follow the rule, we will adjust it.
+  //
+  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
+    return EFI_UNSUPPORTED;
+  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
+    if (IsStart && ((Identifier & 0x000F) != 0)) {
+      Identifier &= 0xFFF0;
+    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
+      Identifier += 1;
+    }
+    RecordInfo.ProgressID = (UINT16)Identifier;
+  }
+
+  if (mFpdtBufferIsReported) {
+    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
+  } else {
+    //
+    // Check if pre-allocated buffer is full
     //
-    // Try to enlarge the scale of gauge array.
+    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
+      mPerformancePointer = ReallocatePool (
+                              mPerformanceLength,
+                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
+                              mPerformancePointer
+                              );
+
+      if (mPerformancePointer == NULL) {
+        return EFI_OUT_OF_RESOURCES;
+      }
+      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
+    }
     //
-    OldGaugeData      = mGaugeData;
-    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
+    // Covert buffer to FPDT Ptr Union type.
+    //
+    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
+  }
+  FpdtRecordPtr.RecordHeader->Length = 0;
 
-    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
+  //
+  // Get the TimeStamp.
+  //
+  if (Ticker == 0) {
+    Ticker    = GetPerformanceCounter ();
+    TimeStamp = GetTimeInNanoSecond (Ticker);
+  } else if (Ticker == 1) {
+    TimeStamp = 0;
+  } else {
+    TimeStamp = GetTimeInNanoSecond (Ticker);
+  }
 
-    NewGaugeData = AllocateZeroPool (GaugeDataSize);
-    if (NewGaugeData == NULL) {
-      EfiReleaseLock (&mPerfRecordLock);
-      return EFI_OUT_OF_RESOURCES;
+  //
+  // Get the ModuleName and ModuleGuid form the handle.
+  //
+  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
+
+  //
+  // Fill in the record information.
+  //
+  switch (RecordInfo.Type) {
+  case GUID_EVENT_TYPE:
+    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
+    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
+    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
+    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
+    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
+    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
+    break;
+
+  case DYNAMIC_STRING_EVENT_TYPE:
+    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
+    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
+    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
+    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
+    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
+    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
+
+    if (UseModuleName) {
+      StringPtr     = ModuleName;
+    } else if (Token != NULL) {
+      StringPtr     = Token;
+    } else if (Module != NULL) {
+      StringPtr     = Module;
+    } else if (ModuleName != NULL) {
+      StringPtr     = ModuleName;
+    }
+    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
+      StrLength     = AsciiStrLen (StringPtr);
+      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
+      if (StrLength >= DestMax) {
+        StrLength   = DestMax -1;
+      }
+      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
     }
+    break;
+
+  case GUID_QWORD_EVENT_TYPE:
+    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
+    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
+    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
+    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
+    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
+    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
+    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
+      mLoadImageCount++;
+      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
+    }
+    break;
+
+  case GUID_QWORD_STRING_EVENT_TYPE:
+    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
+    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
+    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
+    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
+    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
+    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
+    break;
+
+  default:
+    //
+    // Record is not supported in current DXE phase, return EFI_ABORTED
+    //
+    return EFI_UNSUPPORTED;
+  }
+
+  //
+  // Report record one by one after records have been reported together.
+  //
+  if (mFpdtBufferIsReported) {
+      //
+      // Append Boot records to the boot performance table.
+      //
+      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
+        if (!mLackSpaceIsReported) {
+          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
+          mLackSpaceIsReported = TRUE;
+        }
+        return EFI_OUT_OF_RESOURCES;
+      } else {
+        //
+        // Save boot record into BootPerformance table
+        //
+        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
+        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
+        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
+      }
+  } else {
+    //
+    // Update the cached FPDT record buffer.
+    //
+    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Dumps all the PEI performance.
+
+  @param  HobStart      A pointer to a Guid.
 
-    mGaugeData = NewGaugeData;
-    mMaxGaugeRecords *= 2;
+  This internal function dumps all the PEI performance log to the DXE performance gauge array.
+  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
+  to DXE performance data structures.
 
+**/
+VOID
+InternalGetPeiPerformance (
+  VOID  *HobStart
+  )
+{
+  UINT8                                *FirmwarePerformanceHob;
+  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
+  UINT8                                *EventRec;
+  EFI_HOB_GUID_TYPE                    *GuidHob;
+
+  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
+  while (GuidHob != NULL) {
+    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
+    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
+
+    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
+      mPerformancePointer = ReallocatePool (
+                              mPerformanceLength,
+                              mPerformanceLength +
+                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
+                              FIRMWARE_RECORD_BUFFER,
+                              mPerformancePointer
+                              );
+      ASSERT (mPerformancePointer != NULL);
+      mMaxPerformanceLength = mPerformanceLength +
+                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
+                              FIRMWARE_RECORD_BUFFER;
+    }
+
+    EventRec = mPerformancePointer + mPerformanceLength;
+    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
     //
-    // Initialize new data array and migrate old data one.
+    // Update the used buffer size.
     //
-    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
+    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
+    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
 
-    FreePool (OldGaugeData);
+    //
+    // Get next performance guid hob
+    //
+    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
   }
+}
 
-  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
-  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
+/**
+  Report Boot Perforamnce table address as report status code.
 
-  if (Token != NULL) {
-    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
-  }
-  if (Module != NULL) {
-    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
+  @param  Event    The event of notify protocol.
+  @param  Context  Notify event context.
+
+**/
+VOID
+EFIAPI
+ReportFpdtRecordBuffer (
+  IN EFI_EVENT     Event,
+  IN VOID          *Context
+  )
+{
+  EFI_STATUS      Status;
+  UINT64          BPDTAddr;
+
+  if (!mFpdtBufferIsReported) {
+    Status = AllocateBootPerformanceTable ();
+    if (!EFI_ERROR(Status)) {
+      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
+      REPORT_STATUS_CODE_EX (
+          EFI_PROGRESS_CODE,
+          EFI_SOFTWARE_DXE_BS_DRIVER,
+          0,
+          NULL,
+          &gEfiFirmwarePerformanceGuid,
+          &BPDTAddr,
+          sizeof (UINT64)
+          );
+    }
+    //
+    // Free Cached FPDT record Buffer
+    //
+    if (mPerformancePointer != NULL) {
+      FreePool (mPerformancePointer);
+      mPerformancePointer   = NULL;
+    }
+    mPerformanceLength    = 0;
+    mMaxPerformanceLength = 0;
+    //
+    // Set FPDT report state to TRUE.
+    //
+    mFpdtBufferIsReported = TRUE;
   }
+}
 
-  GaugeEntryExArray[Index].EndTimeStamp = 0;
-  GaugeEntryExArray[Index].Identifier = Identifier;
+/**
+  Adds a record at the end of the performance measurement log
+  that records the start time of a performance measurement.
 
-  if (TimeStamp == 0) {
-    TimeStamp = GetPerformanceCounter ();
-  }
-  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
+  Adds a record to the end of the performance measurement log
+  that contains the Handle, Token, Module and Identifier.
+  The end time of the new record must be set to zero.
+  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
+  If TimeStamp is zero, the start time in the record is filled in with the value
+  read from the current time stamp.
 
-  mGaugeData->NumberOfEntries++;
+  @param  Handle                  Pointer to environment specific context used
+                                  to identify the component being measured.
+  @param  Token                   Pointer to a Null-terminated ASCII string
+                                  that identifies the component being measured.
+  @param  Module                  Pointer to a Null-terminated ASCII string
+                                  that identifies the module being measured.
+  @param  TimeStamp               64-bit time stamp.
+  @param  Identifier              32-bit identifier. If the value is 0, the created record
+                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
 
-  EfiReleaseLock (&mPerfRecordLock);
+  @retval EFI_SUCCESS             The data was read correctly from the device.
+  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
 
-  return EFI_SUCCESS;
+**/
+EFI_STATUS
+EFIAPI
+StartGaugeEx (
+  IN CONST VOID   *Handle,  OPTIONAL
+  IN CONST CHAR8  *Token,   OPTIONAL
+  IN CONST CHAR8  *Module,  OPTIONAL
+  IN UINT64       TimeStamp,
+  IN UINT32       Identifier
+  )
+{
+  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
 }
 
 /**
   Searches the performance measurement log from the beginning of the log
   for the first matching record that contains a zero end time and fills in a valid end time.
 
   Searches the performance measurement log from the beginning of the log
-  for the first record that matches Handle, Token and Module and has an end time value of zero.
+  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
   If the record can not be found then return EFI_NOT_FOUND.
   If the record is found and TimeStamp is not zero,
   then the end time in the record is filled in with the value specified by TimeStamp.
   If the record is found and TimeStamp is zero, then the end time in the matching record
   is filled in with the current time stamp value.
@@ -260,89 +1188,19 @@ EndGaugeEx (
   IN CONST CHAR8  *Module,  OPTIONAL
   IN UINT64       TimeStamp,
   IN UINT32       Identifier
   )
 {
-  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
-  UINT32              Index;
-  EFI_STATUS          Status;
-
-  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
-  if (EFI_ERROR (Status)) {
-    return Status;
-  }
-
-  if (TimeStamp == 0) {
-    TimeStamp = GetPerformanceCounter ();
-  }
-
-  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
-  if (Index >= mGaugeData->NumberOfEntries) {
-    EfiReleaseLock (&mPerfRecordLock);
-    return EFI_NOT_FOUND;
-  }
-  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
-  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
-
-  EfiReleaseLock (&mPerfRecordLock);
-  return EFI_SUCCESS;
+  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
 }
 
 /**
   Retrieves a previously logged performance measurement.
   It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
   and then assign the Identifier with 0.
 
-  Retrieves the performance log entry from the performance log specified by LogEntryKey.
-  If it stands for a valid entry, then EFI_SUCCESS is returned and
-  GaugeDataEntryEx stores the pointer to that entry.
-
-  This internal function is added to avoid releasing lock before each return statement.
-
-  @param  LogEntryKey             The key for the previous performance measurement log entry.
-                                  If 0, then the first performance measurement log entry is retrieved.
-  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
-                                  if the retrieval is successful.
-
-  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
-  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
-  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
-  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
-
-**/
-EFI_STATUS
-EFIAPI
-InternalGetGaugeEx (
-  IN  UINTN                 LogEntryKey,
-  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
-  )
-{
-  UINTN               NumberOfEntries;
-  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
-
-  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
-  if (LogEntryKey > NumberOfEntries) {
-    return EFI_INVALID_PARAMETER;
-  }
-  if (LogEntryKey == NumberOfEntries) {
-    return EFI_NOT_FOUND;
-  }
-
-  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
-
-  if (GaugeDataEntryEx == NULL) {
-    return EFI_INVALID_PARAMETER;
-  }
-  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
-
-  return EFI_SUCCESS;
-}
-
-/**
-  Retrieves a previously logged performance measurement.
-  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
-  and then assign the Identifier with 0.
+    !!! Not support!!!
 
   Retrieves the performance log entry from the performance log specified by LogEntryKey.
   If it stands for a valid entry, then EFI_SUCCESS is returned and
   GaugeDataEntryEx stores the pointer to that entry.
 
@@ -362,22 +1220,11 @@ EFIAPI
 GetGaugeEx (
   IN  UINTN                 LogEntryKey,
   OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
   )
 {
-  EFI_STATUS                Status;
-
-  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
-  if (EFI_ERROR (Status)) {
-    return Status;
-  }
-
-  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
-
-  EfiReleaseLock (&mPerfRecordLock);
-
-  return Status;
+  return EFI_UNSUPPORTED;
 }
 
 /**
   Adds a record at the end of the performance measurement log
   that records the start time of a performance measurement.
@@ -452,10 +1299,12 @@ EndGauge (
 /**
   Retrieves a previously logged performance measurement.
   It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
   and then eliminate the Identifier.
 
+    !!! Not support!!!
+
   Retrieves the performance log entry from the performance log specified by LogEntryKey.
   If it stands for a valid entry, then EFI_SUCCESS is returned and
   GaugeDataEntry stores the pointer to that entry.
 
   @param  LogEntryKey             The key for the previous performance measurement log entry.
@@ -474,81 +1323,13 @@ EFIAPI
 GetGauge (
   IN  UINTN               LogEntryKey,
   OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
   )
 {
-  EFI_STATUS          Status;
-  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
-
-  GaugeEntryEx = NULL;
-
-  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
-  if (EFI_ERROR (Status)) {
-    return Status;
-  }
-
-  if (GaugeDataEntry == NULL) {
-    return EFI_INVALID_PARAMETER;
-  }
-
-  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
-
-  return EFI_SUCCESS;
+  return EFI_UNSUPPORTED;
 }
 
-/**
-  Dumps all the PEI performance log to DXE performance gauge array.
-
-  This internal function dumps all the PEI performance log to the DXE performance gauge array.
-  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
-  to DXE performance data structures.
-
-**/
-VOID
-InternalGetPeiPerformance (
-  VOID
-  )
-{
-  EFI_HOB_GUID_TYPE                 *GuidHob;
-  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
-  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
-  UINT32                            *LogIdArray;
-  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
-  UINT32                            Index;
-  UINT32                            NumberOfEntries;
-
-  NumberOfEntries = 0;
-  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
-
-  //
-  // Dump PEI Log Entries to DXE Guage Data structure.
-  //
-  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
-  if (GuidHob != NULL) {
-    LogHob          = GET_GUID_HOB_DATA (GuidHob);
-    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
-
-    NumberOfEntries = LogHob->NumberOfEntries;
-    for (Index = 0; Index < NumberOfEntries; Index++) {
-      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
-      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
-      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
-      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
-      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
-      GaugeEntryExArray[Index].Identifier     = 0;
-    }
-
-    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
-    if (GuidHob != NULL) {
-      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
-      for (Index = 0; Index < NumberOfEntries; Index++) {
-        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
-      }
-    }
-  }
-  mGaugeData->NumberOfEntries = NumberOfEntries;
-}
 
 /**
   The constructor function initializes Performance infrastructure for DXE phase.
 
   The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
@@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
   IN EFI_HANDLE        ImageHandle,
   IN EFI_SYSTEM_TABLE  *SystemTable
   )
 {
   EFI_STATUS                Status;
+  EFI_HANDLE                Handle;
+  EFI_EVENT                 ReadyToBootEvent;
   PERFORMANCE_PROPERTY      *PerformanceProperty;
 
-
   if (!PerformanceMeasurementEnabled ()) {
     //
     // Do not initialize performance infrastructure if not required.
     //
     return EFI_SUCCESS;
   }
+
+  //
+  // Dump normal PEI performance records
+  //
+  InternalGetPeiPerformance (GetHobList());
+
   //
-  // Install the protocol interfaces.
+  // Install the protocol interfaces for DXE performance library instance.
   //
+  Handle = NULL;
   Status = gBS->InstallMultipleProtocolInterfaces (
-                  &mHandle,
+                  &Handle,
                   &gPerformanceProtocolGuid,
                   &mPerformanceInterface,
                   &gPerformanceExProtocolGuid,
                   &mPerformanceExInterface,
                   NULL
                   );
   ASSERT_EFI_ERROR (Status);
 
-  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
-                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
-                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
-
-  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
-  ASSERT (mGaugeData != NULL);
+  //
+  // Register ReadyToBoot event to report StatusCode data
+  //
+  Status = gBS->CreateEventEx (
+                  EVT_NOTIFY_SIGNAL,
+                  TPL_CALLBACK,
+                  ReportFpdtRecordBuffer,
+                  NULL,
+                  &gEfiEventReadyToBootGuid,
+                  &ReadyToBootEvent
+                  );
 
-  InternalGetPeiPerformance ();
+  ASSERT_EFI_ERROR (Status);
 
   Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
   if (EFI_ERROR (Status)) {
     //
     // Install configuration table for performance property.
@@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
   IN CONST CHAR8  *Module,  OPTIONAL
   IN UINT64       TimeStamp,
   IN UINT32       Identifier
   )
 {
-  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
+  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
 }
 
 /**
   Searches the performance measurement log from the beginning of the log
   for the first matching record that contains a zero end time and fills in a valid end time.
 
   Searches the performance measurement log from the beginning of the log
-  for the first record that matches Handle, Token and Module and has an end time value of zero.
+  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
   If the record can not be found then return RETURN_NOT_FOUND.
   If the record is found and TimeStamp is not zero,
   then the end time in the record is filled in with the value specified by TimeStamp.
   If the record is found and TimeStamp is zero, then the end time in the matching record
   is filled in with the current time stamp value.
@@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
   IN CONST CHAR8  *Module,  OPTIONAL
   IN UINT64       TimeStamp,
   IN UINT32       Identifier
   )
 {
-  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
+  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
 }
 
 /**
   Attempts to retrieve a performance measurement log entry from the performance measurement log.
   It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
   and then assign the Identifier with 0.
 
+    !!! Not support!!!
+
   Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
   zero on entry, then an attempt is made to retrieve the first entry from the performance log,
   and the key for the second entry in the log is returned.  If the performance log is empty,
   then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
   log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
@@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
                                   being measured.
   @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
                                   was started.
   @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
                                   was ended.
-  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
+  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
+                                  was ended.
 
   @return The key for the next performance log entry (in general case).
 
 **/
 UINTN
 EFIAPI
 GetPerformanceMeasurementEx (
-  IN  UINTN       LogEntryKey, 
+  IN  UINTN       LogEntryKey,
   OUT CONST VOID  **Handle,
   OUT CONST CHAR8 **Token,
   OUT CONST CHAR8 **Module,
   OUT UINT64      *StartTimeStamp,
   OUT UINT64      *EndTimeStamp,
   OUT UINT32      *Identifier
   )
 {
-  EFI_STATUS           Status;
-  GAUGE_DATA_ENTRY_EX  *GaugeData;
-
-  GaugeData = NULL;
-  
-  ASSERT (Handle != NULL);
-  ASSERT (Token != NULL);
-  ASSERT (Module != NULL);
-  ASSERT (StartTimeStamp != NULL);
-  ASSERT (EndTimeStamp != NULL);
-  ASSERT (Identifier != NULL);
-
-  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
-
-  //
-  // Make sure that LogEntryKey is a valid log entry key,
-  //
-  ASSERT (Status != EFI_INVALID_PARAMETER);
-
-  if (EFI_ERROR (Status)) {
-    //
-    // The LogEntryKey is the last entry (equals to the total entry number).
-    //
-    return 0;
-  }
-
-  ASSERT (GaugeData != NULL);
-
-  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
-  *Token          = GaugeData->Token;
-  *Module         = GaugeData->Module;
-  *StartTimeStamp = GaugeData->StartTimeStamp;
-  *EndTimeStamp   = GaugeData->EndTimeStamp;
-  *Identifier     = GaugeData->Identifier;
-
-  return LogEntryKey;
+  return 0;
 }
 
 /**
   Adds a record at the end of the performance measurement log
   that records the start time of a performance measurement.
@@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
   IN CONST CHAR8  *Token,   OPTIONAL
   IN CONST CHAR8  *Module,  OPTIONAL
   IN UINT64       TimeStamp
   )
 {
-  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
+  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
 }
 
 /**
   Searches the performance measurement log from the beginning of the log
   for the first matching record that contains a zero end time and fills in a valid end time.
@@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
   IN CONST CHAR8  *Token,   OPTIONAL
   IN CONST CHAR8  *Module,  OPTIONAL
   IN UINT64       TimeStamp
   )
 {
-  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
+  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
 }
 
 /**
   Attempts to retrieve a performance measurement log entry from the performance measurement log.
   It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
   and then eliminate the Identifier.
 
+  !!! Not support!!!
+
   Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
   zero on entry, then an attempt is made to retrieve the first entry from the performance log,
   and the key for the second entry in the log is returned.  If the performance log is empty,
   then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
   log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
@@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
   OUT CONST CHAR8 **Module,
   OUT UINT64      *StartTimeStamp,
   OUT UINT64      *EndTimeStamp
   )
 {
-  UINT32 Identifier;
-  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
+  return 0;
 }
 
 /**
   Returns TRUE if the performance measurement macros are enabled.
 
diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
index 5b89ce2..71c181f 100644
--- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
+++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
@@ -7,11 +7,11 @@
 #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
 #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
 #  This library is mainly used by DxeCore to start performance logging to ensure that
 #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
 #  
-#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
 # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
 #  which accompanies this distribution.  The full text of the license may be found at
 #  http://opensource.org/licenses/bsd-license.php
@@ -48,27 +48,39 @@
 
 
 [LibraryClasses]
   MemoryAllocationLib
   UefiBootServicesTableLib
+  UefiRuntimeServicesTableLib
   PcdLib
   TimerLib
   BaseMemoryLib
   BaseLib
   HobLib
   DebugLib
   UefiLib
+  ReportStatusCodeLib
+  DxeServicesLib
+  PeCoffGetEntryPointLib
+
+[Protocols]
+  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
 
 
 [Guids]
   ## SOMETIMES_CONSUMES   ## HOB
   ## PRODUCES             ## UNDEFINED # Install protocol
   ## PRODUCES             ## SystemTable
   gPerformanceProtocolGuid
   ## SOMETIMES_CONSUMES   ## HOB
   ## PRODUCES             ## UNDEFINED # Install protocol
   gPerformanceExProtocolGuid
+  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
+  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
+  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
+  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
+  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
 
 [Pcd]
-  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
-  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
-  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
+  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
index f1540d8..7e79675 100644
--- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
+++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
@@ -2,11 +2,11 @@
   Master header files for DxeCorePerformanceLib instance.
 
   This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
   library instance at its constructor.
 
-Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
 http://opensource.org/licenses/bsd-license.php
 
@@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 
 #include <PiDxe.h>
 
 #include <Guid/Performance.h>
+#include <Guid/ExtendedFirmwarePerformance.h>
+#include <Guid/ZeroGuid.h>
+#include <Guid/EventGroup.h>
+#include <Guid/FirmwarePerformance.h>
+#include <Guid/PiSmmCommunicationRegionTable.h>
+
+#include <Protocol/DriverBinding.h>
+#include <Protocol/LoadedImage.h>
+#include <Protocol/ComponentName2.h>
+#include <Protocol/DevicePathToText.h>
+#include <Protocol/SmmCommunication.h>
 
 #include <Library/PerformanceLib.h>
 #include <Library/DebugLib.h>
 #include <Library/HobLib.h>
 #include <Library/BaseLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/TimerLib.h>
 #include <Library/PcdLib.h>
 #include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
 #include <Library/MemoryAllocationLib.h>
 #include <Library/UefiLib.h>
+#include <Library/ReportStatusCodeLib.h>
+#include <Library/DxeServicesLib.h>
+#include <Library/PeCoffGetEntryPointLib.h>
 
 //
 // Interface declarations for PerformanceEx Protocol.
 //
 /**
-- 
1.9.5.msysgit.1

_______________________________________________
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edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Ard Biesheuvel 6 years, 7 months ago
On 30 January 2018 at 14:53, Dandan Bi <dandan.bi@intel.com> wrote:
> V2:
> Update DxecorePerformanceLib to report the boot performance table
> address instead of records contents.
>
> Updated to convert Pref entry to FPDT record in DXE phase and then
> allocate boot performance table to save the record and report
> the address of boot performance table to FirmwarePerformanceDxe.
>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Star Zeng <star.zeng@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Dandan Bi <dandan.bi@intel.com>
> ---
>  .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
>  .../DxeCorePerformanceLib.inf                      |   20 +-
>  .../DxeCorePerformanceLibInternal.h                |   17 +-
>  3 files changed, 1108 insertions(+), 318 deletions(-)
>
> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
> index 7c0e207..c6f8a16 100644
> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
> @@ -8,11 +8,11 @@
>    which are consumed by DxePerformanceLib to logging performance data in DXE phase.
>
>    This library is mainly used by DxeCore to start performance logging to ensure that
>    Performance Protocol is installed at the very beginning of DXE phase.
>
> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>  This program and the accompanying materials
>  are licensed and made available under the terms and conditions of the BSD License
>  which accompanies this distribution.  The full text of the license may be found at
>  http://opensource.org/licenses/bsd-license.php
> @@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>  **/
>
>
>  #include "DxeCorePerformanceLibInternal.h"
>
> -
>  //
> -// The data structure to hold global performance data.
> +// Data for FPDT performance records.
>  //
> -GAUGE_DATA_HEADER    *mGaugeData;
> +#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
> +#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
> +#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
> +#define FIRMWARE_RECORD_BUFFER  0x10000
> +#define CACHE_HANDLE_GUID_COUNT 0x1000
> +
> +BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
> +BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
> +  {
> +    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
> +    sizeof (BOOT_PERFORMANCE_TABLE)
> +  },
> +  {
> +    {
> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
> +      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
> +    },
> +    0,  // Reserved
> +    //
> +    // These values will be updated at runtime.
> +    //
> +    0,  // ResetEnd
> +    0,  // OsLoaderLoadImageStart
> +    0,  // OsLoaderStartImageStart
> +    0,  // ExitBootServicesEntry
> +    0   // ExitBootServicesExit
> +  }
> +};
>
> -//
> -// The current maximum number of logging entries. If current number of
> -// entries exceeds this value, it will re-allocate a larger array and
> -// migration the old data to the larger array.
> -//
> -UINT32               mMaxGaugeRecords;
> +typedef struct {
> +  EFI_HANDLE    Handle;
> +  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
> +  EFI_GUID      ModuleGuid;
> +} HANDLE_GUID_MAP;
>
> -//
> -// The handle to install Performance Protocol instance.
> -//
> -EFI_HANDLE           mHandle = NULL;
> +HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
> +UINTN           mCachePairCount = 0;
> +
> +UINT32  mLoadImageCount       = 0;
> +UINT32  mPerformanceLength    = 0;
> +UINT32  mMaxPerformanceLength = 0;
> +UINT32  mBootRecordSize       = 0;
> +UINT32  mBootRecordMaxSize    = 0;
> +
> +BOOLEAN mFpdtBufferIsReported = FALSE;
> +BOOLEAN mLackSpaceIsReported  = FALSE;
> +CHAR8   *mPlatformLanguage    = NULL;
> +UINT8   *mPerformancePointer  = NULL;
> +UINT8   *mBootRecordBuffer    = NULL;
> +
> +EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
>
>  //
>  // Interfaces for Performance Protocol.
>  //
>  PERFORMANCE_PROTOCOL mPerformanceInterface = {
> @@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
>    GetGaugeEx
>    };
>
>  PERFORMANCE_PROPERTY  mPerformanceProperty;
>
> -//
> -//  Gauge record lock to avoid data corruption or even memory overflow
> -//
> -STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
> +/**
> +Check whether the Token is a known one which is uesed by core.
> +
> +@param  Token      Pointer to a Null-terminated ASCII string
> +
> +@retval TRUE       Is a known one used by core.
> +@retval FALSE      Not a known one.
> +
> +**/
> +BOOLEAN
> +IsKnownTokens (
> +  IN CONST CHAR8  *Token
> +  )
> +{
> +  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
> +      AsciiStrCmp (Token, PEI_TOK) == 0 ||
> +      AsciiStrCmp (Token, DXE_TOK) == 0 ||
> +      AsciiStrCmp (Token, BDS_TOK) == 0 ||
> +      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
> +      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
> +      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
> +      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
> +      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
> +      AsciiStrCmp (Token, PEIM_TOK) == 0) {
> +    return TRUE;
> +  } else {
> +    return FALSE;
> +  }
> +}
> +
> +/**
> +Check whether the ID is a known one which map to the known Token.
> +
> +@param  Identifier  32-bit identifier.
> +
> +@retval TRUE        Is a known one used by core.
> +@retval FALSE       Not a known one.
> +
> +**/
> +BOOLEAN
> +IsKnownID (
> +  IN UINT32       Identifier
> +  )
> +{
> +  if (Identifier == MODULE_START_ID ||
> +      Identifier == MODULE_END_ID ||
> +      Identifier == MODULE_LOADIMAGE_START_ID ||
> +      Identifier == MODULE_LOADIMAGE_END_ID ||
> +      Identifier == MODULE_DB_START_ID ||
> +      Identifier == MODULE_DB_END_ID ||
> +      Identifier == MODULE_DB_SUPPORT_START_ID ||
> +      Identifier == MODULE_DB_SUPPORT_END_ID ||
> +      Identifier == MODULE_DB_STOP_START_ID ||
> +      Identifier == MODULE_DB_STOP_END_ID) {
> +    return TRUE;
> +  } else {
> +    return FALSE;
> +  }
> +}
>
>  /**
> -  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
> +  Allocate EfiReservedMemoryType below 4G memory address.
> +
> +  This function allocates EfiReservedMemoryType below 4G memory address.
> +
> +  @param[in]  Size   Size of memory to allocate.
> +
> +  @return Allocated address for output.
> +
> +**/
> +VOID *
> +FpdtAllocateReservedMemoryBelow4G (
> +  IN UINTN       Size
> +  )
> +{
> +  UINTN                 Pages;
> +  EFI_PHYSICAL_ADDRESS  Address;
> +  EFI_STATUS            Status;
> +  VOID                  *Buffer;
> +
> +  Buffer  = NULL;
> +  Pages   = EFI_SIZE_TO_PAGES (Size);
> +  Address = 0xffffffff;
> +
> +  Status = gBS->AllocatePages (
> +                  AllocateMaxAddress,
> +                  EfiReservedMemoryType,
> +                  Pages,
> +                  &Address
> +                  );
> +  ASSERT_EFI_ERROR (Status);

This code is breaking DEBUG builds on ARM systems that have no memory
below 4 GB.

> +
> +  if (!EFI_ERROR (Status)) {
> +    Buffer = (VOID *) (UINTN) Address;
> +    ZeroMem (Buffer, Size);
> +  }
> +
> +  return Buffer;
> +}
> +
> +/**
> +  Allocate buffer for Boot Performance table.
> +
> +  @return Status code.
> +
> +**/
> +EFI_STATUS
> +AllocateBootPerformanceTable (
> +  )
> +{
> +  EFI_STATUS                    Status;
> +  UINTN                         Size;
> +  UINT8                         *SmmBootRecordCommBuffer;
> +  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
> +  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
> +  UINTN                         CommSize;
> +  UINTN                         BootPerformanceDataSize;
> +  UINT8                         *BootPerformanceData;
> +  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
> +  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
> +  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
> +  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
> +  UINTN                         Index;
> +  VOID                          *SmmBootRecordData;
> +  UINTN                         SmmBootRecordDataSize;
> +  UINTN                         ReservedMemSize;
> +
> +  //
> +  // Collect boot records from SMM drivers.
> +  //
> +  SmmBootRecordCommBuffer = NULL;
> +  SmmCommData             = NULL;
> +  SmmBootRecordData       = NULL;
> +  SmmBootRecordDataSize   = 0;
> +  ReservedMemSize         = 0;
> +  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
> +  if (!EFI_ERROR (Status)) {
> +    //
> +    // Initialize communicate buffer
> +    // Get the prepared Reserved Memory Range
> +    //
> +    Status = EfiGetSystemConfigurationTable (
> +              &gEdkiiPiSmmCommunicationRegionTableGuid,
> +              (VOID **) &SmmCommRegionTable
> +              );
> +    if (!EFI_ERROR (Status)) {
> +      ASSERT (SmmCommRegionTable != NULL);
> +      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
> +      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
> +        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
> +          break;
> +        }
> +        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
> +      }
> +      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
> +      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
> +      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
> +      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
> +
> +      //
> +      // Check enough reserved memory space
> +      //
> +      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
> +        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
> +        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
> +        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
> +        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
> +
> +        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
> +        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
> +        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
> +
> +        //
> +        // Get the size of boot records.
> +        //
> +        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
> +        SmmCommData->BootRecordData = NULL;
> +        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
> +        ASSERT_EFI_ERROR (Status);
> +
> +        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
> +          //
> +          // Get all boot records
> +          //
> +          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
> +          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
> +          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
> +          ASSERT (SmmBootRecordData  != NULL);
> +          SmmCommData->BootRecordOffset = 0;
> +          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
> +          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
> +          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
> +            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
> +            ASSERT_EFI_ERROR (Status);
> +            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
> +            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
> +            } else {
> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
> +            }
> +            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
> +          }
> +        }
> +      }
> +    }
> +  }
> +
> +  //
> +  // Prepare memory for Boot Performance table.
> +  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
> +  //
> +  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
> +  if (SmmCommData != NULL) {
> +    BootPerformanceDataSize += SmmBootRecordDataSize;
> +  }
> +
> +  //
> +  // Try to allocate the same runtime buffer as last time boot.
> +  //
> +  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
> +  Size = sizeof (PerformanceVariable);
> +  Status = gRT->GetVariable (
> +                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
> +                  &gEfiFirmwarePerformanceGuid,
> +                  NULL,
> +                  &Size,
> +                  &PerformanceVariable
> +                  );
> +  if (!EFI_ERROR (Status)) {
> +    Status = gBS->AllocatePages (
> +                    AllocateAddress,
> +                    EfiReservedMemoryType,
> +                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
> +                    &PerformanceVariable.BootPerformanceTablePointer
> +                    );
> +    if (!EFI_ERROR (Status)) {
> +      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
> +    }
> +  }
> +
> +  if (mAcpiBootPerformanceTable == NULL) {
> +    //
> +    // Fail to allocate at specified address, continue to allocate at any address.
> +    //
> +    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);

Why does this allocation need to live below 4 GB?

If there is no good reason, can we please get rid of this?
If there is a good reason, can we please document it in the code?

> +  }
> +  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
> +
> +  if (mAcpiBootPerformanceTable == NULL) {
> +    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
> +      FreePool (SmmBootRecordData);
> +    }
> +    return EFI_OUT_OF_RESOURCES;
> +  }
> +
> +  //
> +  // Prepare Boot Performance Table.
> +  //
> +  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
> +  //
> +  // Fill Basic Boot record to Boot Performance Table.
> +  //
> +  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
> +  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
> +  //
> +  // Fill Boot records from boot drivers.
> +  //
> +  if (mPerformancePointer != NULL) {
> +    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
> +    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
> +    BootPerformanceData = BootPerformanceData + mPerformanceLength;
> +  }
> +  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
> +    //
> +    // Fill Boot records from SMM drivers.
> +    //
> +    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
> +    FreePool (SmmBootRecordData);
> +    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
> +    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
> +  }
> +
> +  //
> +  // Save Boot Performance Table address to Variable for use in S4 resume.
> +  //
> +  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
> +
> +  //
> +  // Save Runtime Performance Table pointers to Variable.
> +  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
> +  //
> +  gRT->SetVariable (
> +        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
> +        &gEfiFirmwarePerformanceGuid,
> +        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
> +        sizeof (PerformanceVariable),
> +        &PerformanceVariable
> +        );
> +
> +  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
> +  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
> +  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
> +
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Get a human readable module name and module guid for the given image handle.
> +  If module name can't be found, "" string will return.
> +  If module guid can't be found, Zero Guid will return.
> +
> +  @param    Handle        Image handle or Controller handle.
> +  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
> +  @param    BufferSize    Size of the input NameString buffer.
> +  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
> +
> +  @retval EFI_SUCCESS     Successfully get module name and guid.
> +  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
> +  @retval other value  Module Name can't be got.
> +**/
> +EFI_STATUS
> +GetModuleInfoFromHandle (
> +  IN EFI_HANDLE  Handle,
> +  OUT CHAR8            *NameString,
> +  IN UINTN             BufferSize,
> +  OUT EFI_GUID         *ModuleGuid OPTIONAL
> +  )
> +{
> +  EFI_STATUS                  Status;
> +  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
> +  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
> +  CHAR8                       *PdbFileName;
> +  EFI_GUID                    *TempGuid;
> +  UINTN                       StartIndex;
> +  UINTN                       Index;
> +  INTN                        Count;
> +  BOOLEAN                     ModuleGuidIsGet;
> +  UINTN                       StringSize;
> +  CHAR16                      *StringPtr;
> +  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
> +  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
> +
> +  if (NameString == NULL || BufferSize == 0) {
> +    return EFI_INVALID_PARAMETER;
> +  }
> +  //
> +  // Try to get the ModuleGuid and name string form the caached array.
> +  //
> +  if (mCachePairCount > 0) {
> +    for (Count = mCachePairCount -1; Count >= 0; Count--) {
> +      if (Handle == mCacheHandleGuidTable[Count].Handle) {
> +        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
> +        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
> +        return EFI_SUCCESS;
> +      }
> +    }
> +  }
> +
> +  Status = EFI_INVALID_PARAMETER;
> +  LoadedImage     = NULL;
> +  ModuleGuidIsGet = FALSE;
> +
> +  //
> +  // Initialize GUID as zero value.
> +  //
> +  TempGuid    = &gZeroGuid;
> +  //
> +  // Initialize it as "" string.
> +  //
> +  NameString[0] = 0;
> +
> +  if (Handle != NULL) {
> +    //
> +    // Try Handle as ImageHandle.
> +    //
> +    Status = gBS->HandleProtocol (
> +                  Handle,
> +                  &gEfiLoadedImageProtocolGuid,
> +                  (VOID**) &LoadedImage
> +                  );
> +
> +    if (EFI_ERROR (Status)) {
> +      //
> +      // Try Handle as Controller Handle
> +      //
> +      Status = gBS->OpenProtocol (
> +                    Handle,
> +                    &gEfiDriverBindingProtocolGuid,
> +                    (VOID **) &DriverBinding,
> +                    NULL,
> +                    NULL,
> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                    );
> +      if (!EFI_ERROR (Status)) {
> +        //
> +        // Get Image protocol from ImageHandle
> +        //
> +        Status = gBS->HandleProtocol (
> +                      DriverBinding->ImageHandle,
> +                      &gEfiLoadedImageProtocolGuid,
> +                      (VOID**) &LoadedImage
> +                      );
> +      }
> +    }
> +  }
> +
> +  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
> +    //
> +    // Get Module Guid from DevicePath.
> +    //
> +    if (LoadedImage->FilePath != NULL &&
> +        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
> +        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
> +       ) {
> +      //
> +      // Determine GUID associated with module logging performance
> +      //
> +      ModuleGuidIsGet = TRUE;
> +      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
> +      TempGuid        = &FvFilePath->FvFileName;
> +    }
> +
> +    //
> +    // Method 1 Get Module Name from PDB string.
> +    //
> +    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
> +    if (PdbFileName != NULL && BufferSize > 0) {
> +      StartIndex = 0;
> +      for (Index = 0; PdbFileName[Index] != 0; Index++) {
> +        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
> +          StartIndex = Index + 1;
> +        }
> +      }
> +      //
> +      // Copy the PDB file name to our temporary string.
> +      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
> +      //
> +      for (Index = 0; Index < BufferSize - 1; Index++) {
> +        NameString[Index] = PdbFileName[Index + StartIndex];
> +        if (NameString[Index] == 0 || NameString[Index] == '.') {
> +          NameString[Index] = 0;
> +          break;
> +        }
> +      }
>
> -  This internal function searches for the gauge entry in the gauge array.
> -  If there is an entry that exactly matches the given keywords
> -  and its end time stamp is zero, then the index of that gauge entry is returned;
> -  otherwise, the the number of gauge entries in the array is returned.
> +      if (Index == BufferSize - 1) {
> +        NameString[Index] = 0;
> +      }
> +      //
> +      // Module Name is got.
> +      //
> +      goto Done;
> +    }
> +  }
>
> +  //
> +  // Method 2: Get the name string from ComponentName2 protocol
> +  //
> +  Status = gBS->HandleProtocol (
> +                  Handle,
> +                  &gEfiComponentName2ProtocolGuid,
> +                  (VOID **) &ComponentName2
> +                  );
> +  if (!EFI_ERROR (Status)) {
> +    //
> +    // Get the current platform language setting
> +    //
> +    if (mPlatformLanguage == NULL) {
> +      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
> +    }
> +    if (mPlatformLanguage != NULL) {
> +      Status = ComponentName2->GetDriverName (
> +                                 ComponentName2,
> +                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
> +                                 &StringPtr
> +                                 );
> +      if (!EFI_ERROR (Status)) {
> +        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
> +          NameString[Index] = (CHAR8) StringPtr[Index];
> +        }
> +        NameString[Index] = 0;
> +        //
> +        // Module Name is got.
> +        //
> +        goto Done;
> +      }
> +    }
> +  }
> +
> +  if (ModuleGuidIsGet) {
> +    //
> +    // Method 3 Try to get the image's FFS UI section by image GUID
> +    //
> +    StringPtr  = NULL;
> +    StringSize = 0;
> +    Status = GetSectionFromAnyFv (
> +              TempGuid,
> +              EFI_SECTION_USER_INTERFACE,
> +              0,
> +              (VOID **) &StringPtr,
> +              &StringSize
> +              );
> +
> +    if (!EFI_ERROR (Status)) {
> +      //
> +      // Method 3. Get the name string from FFS UI section
> +      //
> +      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
> +        NameString[Index] = (CHAR8) StringPtr[Index];
> +      }
> +      NameString[Index] = 0;
> +      FreePool (StringPtr);
> +    }
> +  }
> +
> +Done:
> +  //
> +  // Copy Module Guid
> +  //
> +  if (ModuleGuid != NULL) {
> +    CopyGuid (ModuleGuid, TempGuid);
> +    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
> +        // Handle is GUID
> +      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
> +    }
> +  }
> +
> +  //
> +  // Cache the Handle and Guid pairs.
> +  //
> +  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
> +    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
> +    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
> +    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
> +    mCachePairCount ++;
> +  }
> +
> +  return Status;
> +}
> +
> +/**
> +  Get the FPDT record info.
> +
> +  @param  IsStart                 TRUE if the performance log is start log.
>    @param  Handle                  Pointer to environment specific context used
>                                    to identify the component being measured.
>    @param  Token                   Pointer to a Null-terminated ASCII string
>                                    that identifies the component being measured.
>    @param  Module                  Pointer to a Null-terminated ASCII string
>                                    that identifies the module being measured.
> -  @param  Identifier              32-bit identifier.
> +  @param  RecordInfo              On return, pointer to the info of the record.
> +  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
> +                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
>
> -  @retval The index of gauge entry in the array.
> +  @retval EFI_SUCCESS          Get record info successfully.
> +  @retval EFI_UNSUPPORTED      No matched FPDT record.
>
>  **/
> -UINT32
> -InternalSearchForGaugeEntry (
> -  IN CONST VOID                 *Handle,  OPTIONAL
> -  IN CONST CHAR8                *Token,   OPTIONAL
> -  IN CONST CHAR8                *Module,   OPTIONAL
> -  IN UINT32                     Identifier
> +EFI_STATUS
> +GetFpdtRecordInfo (
> +  IN BOOLEAN                  IsStart,
> +  IN CONST VOID               *Handle,
> +  IN CONST CHAR8              *Token,
> +  IN CONST CHAR8              *Module,
> +  OUT BASIC_RECORD_INFO       *RecordInfo,
> +  IN OUT BOOLEAN              *UseModuleName
>    )
>  {
> -  UINT32                    Index;
> -  UINT32                    Index2;
> -  UINT32                    NumberOfEntries;
> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
> +  UINT16              RecordType;
> +  UINTN               StringSize;
>
> -  if (Token == NULL) {
> -    Token = "";
> -  }
> -  if (Module == NULL) {
> -    Module = "";
> +  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
> +
> +  //
> +  // Token to Type and Id.
> +  //
> +  if (Token != NULL) {
> +    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
> +      *UseModuleName = TRUE;
> +      RecordType     = GUID_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
> +      *UseModuleName = TRUE;
> +      RecordType = GUID_QWORD_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
> +      *UseModuleName = TRUE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_DB_START_ID;
> +        RecordType   = GUID_QWORD_EVENT_TYPE;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_DB_END_ID;
> +        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
> +      }
> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
> +      *UseModuleName = TRUE;
> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
> +        return RETURN_UNSUPPORTED;
> +      }
> +      RecordType     = GUID_QWORD_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
> +      *UseModuleName = TRUE;
> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
> +         return RETURN_UNSUPPORTED;
> +      }
> +      RecordType     = GUID_QWORD_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
> +               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
> +               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
> +      }
> +    } else {                                                          // Pref used in Modules.
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
> +      }
> +    }
> +  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
> +    if (IsStart) {
> +      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
> +    } else {
> +      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
> +    }
> +  } else {
> +    return EFI_UNSUPPORTED;
>    }
>
> -  NumberOfEntries = mGaugeData->NumberOfEntries;
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> +  //
> +  // Get Record size baesed on the record type.
> +  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
> +  //
> +  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
> +    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
> +    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
> +  } else {
> +    switch (RecordType) {
> +    case GUID_EVENT_TYPE:
> +      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
> +      break;
>
> -  Index2 = 0;
> +    case DYNAMIC_STRING_EVENT_TYPE:
> +      if (*UseModuleName) {
> +        StringSize  = STRING_SIZE;
> +      } else if (Token  != NULL) {
> +        StringSize  = AsciiStrSize (Token);
> +      } else if (Module != NULL) {
> +        StringSize  = AsciiStrSize (Module);
> +      } else {
> +        StringSize  = STRING_SIZE;
> +      }
> +      if (StringSize > STRING_SIZE) {
> +        StringSize   = STRING_SIZE;
> +      }
> +      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
> +      break;
>
> -  for (Index = 0; Index < NumberOfEntries; Index++) {
> -    Index2 = NumberOfEntries - 1 - Index;
> -    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
> -        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
> -      Index = Index2;
> +    case GUID_QWORD_EVENT_TYPE:
> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
>        break;
> +
> +    case GUID_QWORD_STRING_EVENT_TYPE:
> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
> +      break;
> +
> +    default:
> +      //
> +      // Record is unsupported yet, return EFI_UNSUPPORTED
> +      //
> +      return EFI_UNSUPPORTED;
>      }
>    }
>
> -  return Index;
> +  RecordInfo->Type = RecordType;
> +  return EFI_SUCCESS;
>  }
>
>  /**
> -  Adds a record at the end of the performance measurement log
> -  that records the start time of a performance measurement.
> -
> -  Adds a record to the end of the performance measurement log
> -  that contains the Handle, Token, Module and Identifier.
> -  The end time of the new record must be set to zero.
> -  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
> -  If TimeStamp is zero, the start time in the record is filled in with the value
> -  read from the current time stamp.
> +  Add performance log to FPDT boot record table.
>
> +  @param  IsStart                 TRUE if the performance log is start log.
>    @param  Handle                  Pointer to environment specific context used
>                                    to identify the component being measured.
>    @param  Token                   Pointer to a Null-terminated ASCII string
>                                    that identifies the component being measured.
>    @param  Module                  Pointer to a Null-terminated ASCII string
>                                    that identifies the module being measured.
> -  @param  TimeStamp               64-bit time stamp.
> +  @param  Ticker                  64-bit time stamp.
>    @param  Identifier              32-bit identifier. If the value is 0, the created record
>                                    is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>
> -  @retval EFI_SUCCESS             The data was read correctly from the device.
> +  @retval EFI_SUCCESS             Add FPDT boot record.
>    @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
> +  @retval EFI_UNSUPPORTED         No matched FPDT record.
>
>  **/
>  EFI_STATUS
> -EFIAPI
> -StartGaugeEx (
> +InsertFpdtMeasurement (
> +  IN BOOLEAN      IsStart,
>    IN CONST VOID   *Handle,  OPTIONAL
>    IN CONST CHAR8  *Token,   OPTIONAL
>    IN CONST CHAR8  *Module,  OPTIONAL
> -  IN UINT64       TimeStamp,
> +  IN UINT64       Ticker,
>    IN UINT32       Identifier
>    )
>  {
> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
> -  UINTN                     GaugeDataSize;
> -  GAUGE_DATA_HEADER         *NewGaugeData;
> -  UINTN                     OldGaugeDataSize;
> -  GAUGE_DATA_HEADER         *OldGaugeData;
> -  UINT32                    Index;
> -  EFI_STATUS                Status;
> +  EFI_GUID                     ModuleGuid;
> +  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
> +  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
> +  EFI_STATUS                   Status;
> +  FPDT_RECORD_PTR              FpdtRecordPtr;
> +  BASIC_RECORD_INFO            RecordInfo;
> +  UINT64                       TimeStamp;
> +  UINTN                        DestMax;
> +  UINTN                        StrLength;
> +  CONST CHAR8                  *StringPtr;
> +  BOOLEAN                      UseModuleName;
> +
> +  StringPtr     = NULL;
> +  UseModuleName = FALSE;
> +  ZeroMem (ModuleName, sizeof (ModuleName));
> +  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
>
> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
> +  //
> +  // Get record info (type, size, ProgressID and Module Guid).
> +  //
> +  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
>    if (EFI_ERROR (Status)) {
>      return Status;
>    }
>
> -  Index = mGaugeData->NumberOfEntries;
> -  if (Index >= mMaxGaugeRecords) {
> +  //
> +  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
> +  // !!! Note: If the Pref is not the known Token used in the core but have same
> +  // ID with the core Token, this case will not be supported.
> +  // And in currtnt usage mode, for the unkown ID, there is a general rule:
> +  // If it is start pref: the lower 4 bits of the ID should be 0.
> +  // If it is end pref: the lower 4 bits of the ID should not be 0.
> +  // If input ID doesn't follow the rule, we will adjust it.
> +  //
> +  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
> +    return EFI_UNSUPPORTED;
> +  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
> +    if (IsStart && ((Identifier & 0x000F) != 0)) {
> +      Identifier &= 0xFFF0;
> +    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
> +      Identifier += 1;
> +    }
> +    RecordInfo.ProgressID = (UINT16)Identifier;
> +  }
> +
> +  if (mFpdtBufferIsReported) {
> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
> +  } else {
> +    //
> +    // Check if pre-allocated buffer is full
>      //
> -    // Try to enlarge the scale of gauge array.
> +    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
> +      mPerformancePointer = ReallocatePool (
> +                              mPerformanceLength,
> +                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
> +                              mPerformancePointer
> +                              );
> +
> +      if (mPerformancePointer == NULL) {
> +        return EFI_OUT_OF_RESOURCES;
> +      }
> +      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
> +    }
>      //
> -    OldGaugeData      = mGaugeData;
> -    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
> +    // Covert buffer to FPDT Ptr Union type.
> +    //
> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
> +  }
> +  FpdtRecordPtr.RecordHeader->Length = 0;
>
> -    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
> +  //
> +  // Get the TimeStamp.
> +  //
> +  if (Ticker == 0) {
> +    Ticker    = GetPerformanceCounter ();
> +    TimeStamp = GetTimeInNanoSecond (Ticker);
> +  } else if (Ticker == 1) {
> +    TimeStamp = 0;
> +  } else {
> +    TimeStamp = GetTimeInNanoSecond (Ticker);
> +  }
>
> -    NewGaugeData = AllocateZeroPool (GaugeDataSize);
> -    if (NewGaugeData == NULL) {
> -      EfiReleaseLock (&mPerfRecordLock);
> -      return EFI_OUT_OF_RESOURCES;
> +  //
> +  // Get the ModuleName and ModuleGuid form the handle.
> +  //
> +  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
> +
> +  //
> +  // Fill in the record information.
> +  //
> +  switch (RecordInfo.Type) {
> +  case GUID_EVENT_TYPE:
> +    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
> +    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
> +    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
> +    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
> +    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
> +    break;
> +
> +  case DYNAMIC_STRING_EVENT_TYPE:
> +    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
> +    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
> +    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
> +    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
> +    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
> +
> +    if (UseModuleName) {
> +      StringPtr     = ModuleName;
> +    } else if (Token != NULL) {
> +      StringPtr     = Token;
> +    } else if (Module != NULL) {
> +      StringPtr     = Module;
> +    } else if (ModuleName != NULL) {
> +      StringPtr     = ModuleName;
> +    }
> +    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
> +      StrLength     = AsciiStrLen (StringPtr);
> +      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
> +      if (StrLength >= DestMax) {
> +        StrLength   = DestMax -1;
> +      }
> +      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
>      }
> +    break;
> +
> +  case GUID_QWORD_EVENT_TYPE:
> +    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
> +    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
> +    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
> +    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
> +    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
> +    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
> +      mLoadImageCount++;
> +      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
> +    }
> +    break;
> +
> +  case GUID_QWORD_STRING_EVENT_TYPE:
> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
> +    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
> +    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
> +    break;
> +
> +  default:
> +    //
> +    // Record is not supported in current DXE phase, return EFI_ABORTED
> +    //
> +    return EFI_UNSUPPORTED;
> +  }
> +
> +  //
> +  // Report record one by one after records have been reported together.
> +  //
> +  if (mFpdtBufferIsReported) {
> +      //
> +      // Append Boot records to the boot performance table.
> +      //
> +      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
> +        if (!mLackSpaceIsReported) {
> +          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
> +          mLackSpaceIsReported = TRUE;
> +        }
> +        return EFI_OUT_OF_RESOURCES;
> +      } else {
> +        //
> +        // Save boot record into BootPerformance table
> +        //
> +        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
> +        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
> +        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
> +      }
> +  } else {
> +    //
> +    // Update the cached FPDT record buffer.
> +    //
> +    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
> +  }
> +
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Dumps all the PEI performance.
> +
> +  @param  HobStart      A pointer to a Guid.
>
> -    mGaugeData = NewGaugeData;
> -    mMaxGaugeRecords *= 2;
> +  This internal function dumps all the PEI performance log to the DXE performance gauge array.
> +  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
> +  to DXE performance data structures.
>
> +**/
> +VOID
> +InternalGetPeiPerformance (
> +  VOID  *HobStart
> +  )
> +{
> +  UINT8                                *FirmwarePerformanceHob;
> +  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
> +  UINT8                                *EventRec;
> +  EFI_HOB_GUID_TYPE                    *GuidHob;
> +
> +  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
> +  while (GuidHob != NULL) {
> +    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
> +    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
> +
> +    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
> +      mPerformancePointer = ReallocatePool (
> +                              mPerformanceLength,
> +                              mPerformanceLength +
> +                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
> +                              FIRMWARE_RECORD_BUFFER,
> +                              mPerformancePointer
> +                              );
> +      ASSERT (mPerformancePointer != NULL);
> +      mMaxPerformanceLength = mPerformanceLength +
> +                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
> +                              FIRMWARE_RECORD_BUFFER;
> +    }
> +
> +    EventRec = mPerformancePointer + mPerformanceLength;
> +    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
>      //
> -    // Initialize new data array and migrate old data one.
> +    // Update the used buffer size.
>      //
> -    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
> +    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
> +    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
>
> -    FreePool (OldGaugeData);
> +    //
> +    // Get next performance guid hob
> +    //
> +    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
>    }
> +}
>
> -  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
> +/**
> +  Report Boot Perforamnce table address as report status code.
>
> -  if (Token != NULL) {
> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
> -  }
> -  if (Module != NULL) {
> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
> +  @param  Event    The event of notify protocol.
> +  @param  Context  Notify event context.
> +
> +**/
> +VOID
> +EFIAPI
> +ReportFpdtRecordBuffer (
> +  IN EFI_EVENT     Event,
> +  IN VOID          *Context
> +  )
> +{
> +  EFI_STATUS      Status;
> +  UINT64          BPDTAddr;
> +
> +  if (!mFpdtBufferIsReported) {
> +    Status = AllocateBootPerformanceTable ();
> +    if (!EFI_ERROR(Status)) {
> +      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
> +      REPORT_STATUS_CODE_EX (
> +          EFI_PROGRESS_CODE,
> +          EFI_SOFTWARE_DXE_BS_DRIVER,
> +          0,
> +          NULL,
> +          &gEfiFirmwarePerformanceGuid,
> +          &BPDTAddr,
> +          sizeof (UINT64)
> +          );
> +    }
> +    //
> +    // Free Cached FPDT record Buffer
> +    //
> +    if (mPerformancePointer != NULL) {
> +      FreePool (mPerformancePointer);
> +      mPerformancePointer   = NULL;
> +    }
> +    mPerformanceLength    = 0;
> +    mMaxPerformanceLength = 0;
> +    //
> +    // Set FPDT report state to TRUE.
> +    //
> +    mFpdtBufferIsReported = TRUE;
>    }
> +}
>
> -  GaugeEntryExArray[Index].EndTimeStamp = 0;
> -  GaugeEntryExArray[Index].Identifier = Identifier;
> +/**
> +  Adds a record at the end of the performance measurement log
> +  that records the start time of a performance measurement.
>
> -  if (TimeStamp == 0) {
> -    TimeStamp = GetPerformanceCounter ();
> -  }
> -  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
> +  Adds a record to the end of the performance measurement log
> +  that contains the Handle, Token, Module and Identifier.
> +  The end time of the new record must be set to zero.
> +  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
> +  If TimeStamp is zero, the start time in the record is filled in with the value
> +  read from the current time stamp.
>
> -  mGaugeData->NumberOfEntries++;
> +  @param  Handle                  Pointer to environment specific context used
> +                                  to identify the component being measured.
> +  @param  Token                   Pointer to a Null-terminated ASCII string
> +                                  that identifies the component being measured.
> +  @param  Module                  Pointer to a Null-terminated ASCII string
> +                                  that identifies the module being measured.
> +  @param  TimeStamp               64-bit time stamp.
> +  @param  Identifier              32-bit identifier. If the value is 0, the created record
> +                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>
> -  EfiReleaseLock (&mPerfRecordLock);
> +  @retval EFI_SUCCESS             The data was read correctly from the device.
> +  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>
> -  return EFI_SUCCESS;
> +**/
> +EFI_STATUS
> +EFIAPI
> +StartGaugeEx (
> +  IN CONST VOID   *Handle,  OPTIONAL
> +  IN CONST CHAR8  *Token,   OPTIONAL
> +  IN CONST CHAR8  *Module,  OPTIONAL
> +  IN UINT64       TimeStamp,
> +  IN UINT32       Identifier
> +  )
> +{
> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Searches the performance measurement log from the beginning of the log
>    for the first matching record that contains a zero end time and fills in a valid end time.
>
>    Searches the performance measurement log from the beginning of the log
> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>    If the record can not be found then return EFI_NOT_FOUND.
>    If the record is found and TimeStamp is not zero,
>    then the end time in the record is filled in with the value specified by TimeStamp.
>    If the record is found and TimeStamp is zero, then the end time in the matching record
>    is filled in with the current time stamp value.
> @@ -260,89 +1188,19 @@ EndGaugeEx (
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp,
>    IN UINT32       Identifier
>    )
>  {
> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
> -  UINT32              Index;
> -  EFI_STATUS          Status;
> -
> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  if (TimeStamp == 0) {
> -    TimeStamp = GetPerformanceCounter ();
> -  }
> -
> -  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
> -  if (Index >= mGaugeData->NumberOfEntries) {
> -    EfiReleaseLock (&mPerfRecordLock);
> -    return EFI_NOT_FOUND;
> -  }
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
> -
> -  EfiReleaseLock (&mPerfRecordLock);
> -  return EFI_SUCCESS;
> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Retrieves a previously logged performance measurement.
>    It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>    and then assign the Identifier with 0.
>
> -  Retrieves the performance log entry from the performance log specified by LogEntryKey.
> -  If it stands for a valid entry, then EFI_SUCCESS is returned and
> -  GaugeDataEntryEx stores the pointer to that entry.
> -
> -  This internal function is added to avoid releasing lock before each return statement.
> -
> -  @param  LogEntryKey             The key for the previous performance measurement log entry.
> -                                  If 0, then the first performance measurement log entry is retrieved.
> -  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
> -                                  if the retrieval is successful.
> -
> -  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
> -  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
> -  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
> -  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -InternalGetGaugeEx (
> -  IN  UINTN                 LogEntryKey,
> -  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
> -  )
> -{
> -  UINTN               NumberOfEntries;
> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
> -
> -  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
> -  if (LogEntryKey > NumberOfEntries) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -  if (LogEntryKey == NumberOfEntries) {
> -    return EFI_NOT_FOUND;
> -  }
> -
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -
> -  if (GaugeDataEntryEx == NULL) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
> -
> -  return EFI_SUCCESS;
> -}
> -
> -/**
> -  Retrieves a previously logged performance measurement.
> -  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
> -  and then assign the Identifier with 0.
> +    !!! Not support!!!
>
>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>    GaugeDataEntryEx stores the pointer to that entry.
>
> @@ -362,22 +1220,11 @@ EFIAPI
>  GetGaugeEx (
>    IN  UINTN                 LogEntryKey,
>    OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>    )
>  {
> -  EFI_STATUS                Status;
> -
> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
> -
> -  EfiReleaseLock (&mPerfRecordLock);
> -
> -  return Status;
> +  return EFI_UNSUPPORTED;
>  }
>
>  /**
>    Adds a record at the end of the performance measurement log
>    that records the start time of a performance measurement.
> @@ -452,10 +1299,12 @@ EndGauge (
>  /**
>    Retrieves a previously logged performance measurement.
>    It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
>    and then eliminate the Identifier.
>
> +    !!! Not support!!!
> +
>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>    GaugeDataEntry stores the pointer to that entry.
>
>    @param  LogEntryKey             The key for the previous performance measurement log entry.
> @@ -474,81 +1323,13 @@ EFIAPI
>  GetGauge (
>    IN  UINTN               LogEntryKey,
>    OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
>    )
>  {
> -  EFI_STATUS          Status;
> -  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
> -
> -  GaugeEntryEx = NULL;
> -
> -  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  if (GaugeDataEntry == NULL) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
> -
> -  return EFI_SUCCESS;
> +  return EFI_UNSUPPORTED;
>  }
>
> -/**
> -  Dumps all the PEI performance log to DXE performance gauge array.
> -
> -  This internal function dumps all the PEI performance log to the DXE performance gauge array.
> -  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
> -  to DXE performance data structures.
> -
> -**/
> -VOID
> -InternalGetPeiPerformance (
> -  VOID
> -  )
> -{
> -  EFI_HOB_GUID_TYPE                 *GuidHob;
> -  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
> -  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
> -  UINT32                            *LogIdArray;
> -  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
> -  UINT32                            Index;
> -  UINT32                            NumberOfEntries;
> -
> -  NumberOfEntries = 0;
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -
> -  //
> -  // Dump PEI Log Entries to DXE Guage Data structure.
> -  //
> -  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
> -  if (GuidHob != NULL) {
> -    LogHob          = GET_GUID_HOB_DATA (GuidHob);
> -    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
> -
> -    NumberOfEntries = LogHob->NumberOfEntries;
> -    for (Index = 0; Index < NumberOfEntries; Index++) {
> -      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
> -      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
> -      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
> -      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
> -      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
> -      GaugeEntryExArray[Index].Identifier     = 0;
> -    }
> -
> -    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
> -    if (GuidHob != NULL) {
> -      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
> -      for (Index = 0; Index < NumberOfEntries; Index++) {
> -        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
> -      }
> -    }
> -  }
> -  mGaugeData->NumberOfEntries = NumberOfEntries;
> -}
>
>  /**
>    The constructor function initializes Performance infrastructure for DXE phase.
>
>    The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
> @@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
>    IN EFI_HANDLE        ImageHandle,
>    IN EFI_SYSTEM_TABLE  *SystemTable
>    )
>  {
>    EFI_STATUS                Status;
> +  EFI_HANDLE                Handle;
> +  EFI_EVENT                 ReadyToBootEvent;
>    PERFORMANCE_PROPERTY      *PerformanceProperty;
>
> -
>    if (!PerformanceMeasurementEnabled ()) {
>      //
>      // Do not initialize performance infrastructure if not required.
>      //
>      return EFI_SUCCESS;
>    }
> +
> +  //
> +  // Dump normal PEI performance records
> +  //
> +  InternalGetPeiPerformance (GetHobList());
> +
>    //
> -  // Install the protocol interfaces.
> +  // Install the protocol interfaces for DXE performance library instance.
>    //
> +  Handle = NULL;
>    Status = gBS->InstallMultipleProtocolInterfaces (
> -                  &mHandle,
> +                  &Handle,
>                    &gPerformanceProtocolGuid,
>                    &mPerformanceInterface,
>                    &gPerformanceExProtocolGuid,
>                    &mPerformanceExInterface,
>                    NULL
>                    );
>    ASSERT_EFI_ERROR (Status);
>
> -  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
> -                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
> -                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
> -
> -  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
> -  ASSERT (mGaugeData != NULL);
> +  //
> +  // Register ReadyToBoot event to report StatusCode data
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  ReportFpdtRecordBuffer,
> +                  NULL,
> +                  &gEfiEventReadyToBootGuid,
> +                  &ReadyToBootEvent
> +                  );
>
> -  InternalGetPeiPerformance ();
> +  ASSERT_EFI_ERROR (Status);
>
>    Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
>    if (EFI_ERROR (Status)) {
>      //
>      // Install configuration table for performance property.
> @@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp,
>    IN UINT32       Identifier
>    )
>  {
> -  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Searches the performance measurement log from the beginning of the log
>    for the first matching record that contains a zero end time and fills in a valid end time.
>
>    Searches the performance measurement log from the beginning of the log
> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>    If the record can not be found then return RETURN_NOT_FOUND.
>    If the record is found and TimeStamp is not zero,
>    then the end time in the record is filled in with the value specified by TimeStamp.
>    If the record is found and TimeStamp is zero, then the end time in the matching record
>    is filled in with the current time stamp value.
> @@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp,
>    IN UINT32       Identifier
>    )
>  {
> -  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>    It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
>    and then assign the Identifier with 0.
>
> +    !!! Not support!!!
> +
>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>    and the key for the second entry in the log is returned.  If the performance log is empty,
>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
> @@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
>                                    being measured.
>    @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
>                                    was started.
>    @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
>                                    was ended.
> -  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
> +  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
> +                                  was ended.
>
>    @return The key for the next performance log entry (in general case).
>
>  **/
>  UINTN
>  EFIAPI
>  GetPerformanceMeasurementEx (
> -  IN  UINTN       LogEntryKey,
> +  IN  UINTN       LogEntryKey,
>    OUT CONST VOID  **Handle,
>    OUT CONST CHAR8 **Token,
>    OUT CONST CHAR8 **Module,
>    OUT UINT64      *StartTimeStamp,
>    OUT UINT64      *EndTimeStamp,
>    OUT UINT32      *Identifier
>    )
>  {
> -  EFI_STATUS           Status;
> -  GAUGE_DATA_ENTRY_EX  *GaugeData;
> -
> -  GaugeData = NULL;
> -
> -  ASSERT (Handle != NULL);
> -  ASSERT (Token != NULL);
> -  ASSERT (Module != NULL);
> -  ASSERT (StartTimeStamp != NULL);
> -  ASSERT (EndTimeStamp != NULL);
> -  ASSERT (Identifier != NULL);
> -
> -  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
> -
> -  //
> -  // Make sure that LogEntryKey is a valid log entry key,
> -  //
> -  ASSERT (Status != EFI_INVALID_PARAMETER);
> -
> -  if (EFI_ERROR (Status)) {
> -    //
> -    // The LogEntryKey is the last entry (equals to the total entry number).
> -    //
> -    return 0;
> -  }
> -
> -  ASSERT (GaugeData != NULL);
> -
> -  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
> -  *Token          = GaugeData->Token;
> -  *Module         = GaugeData->Module;
> -  *StartTimeStamp = GaugeData->StartTimeStamp;
> -  *EndTimeStamp   = GaugeData->EndTimeStamp;
> -  *Identifier     = GaugeData->Identifier;
> -
> -  return LogEntryKey;
> +  return 0;
>  }
>
>  /**
>    Adds a record at the end of the performance measurement log
>    that records the start time of a performance measurement.
> @@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
>    IN CONST CHAR8  *Token,   OPTIONAL
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp
>    )
>  {
> -  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
>  }
>
>  /**
>    Searches the performance measurement log from the beginning of the log
>    for the first matching record that contains a zero end time and fills in a valid end time.
> @@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
>    IN CONST CHAR8  *Token,   OPTIONAL
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp
>    )
>  {
> -  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
>  }
>
>  /**
>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>    It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
>    and then eliminate the Identifier.
>
> +  !!! Not support!!!
> +
>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>    and the key for the second entry in the log is returned.  If the performance log is empty,
>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
> @@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
>    OUT CONST CHAR8 **Module,
>    OUT UINT64      *StartTimeStamp,
>    OUT UINT64      *EndTimeStamp
>    )
>  {
> -  UINT32 Identifier;
> -  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
> +  return 0;
>  }
>
>  /**
>    Returns TRUE if the performance measurement macros are enabled.
>
> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
> index 5b89ce2..71c181f 100644
> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
> @@ -7,11 +7,11 @@
>  #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
>  #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
>  #  This library is mainly used by DxeCore to start performance logging to ensure that
>  #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
>  #
> -#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>  #  This program and the accompanying materials
>  #  are licensed and made available under the terms and conditions of the BSD License
>  #  which accompanies this distribution.  The full text of the license may be found at
>  #  http://opensource.org/licenses/bsd-license.php
> @@ -48,27 +48,39 @@
>
>
>  [LibraryClasses]
>    MemoryAllocationLib
>    UefiBootServicesTableLib
> +  UefiRuntimeServicesTableLib
>    PcdLib
>    TimerLib
>    BaseMemoryLib
>    BaseLib
>    HobLib
>    DebugLib
>    UefiLib
> +  ReportStatusCodeLib
> +  DxeServicesLib
> +  PeCoffGetEntryPointLib
> +
> +[Protocols]
> +  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
>
>
>  [Guids]
>    ## SOMETIMES_CONSUMES   ## HOB
>    ## PRODUCES             ## UNDEFINED # Install protocol
>    ## PRODUCES             ## SystemTable
>    gPerformanceProtocolGuid
>    ## SOMETIMES_CONSUMES   ## HOB
>    ## PRODUCES             ## UNDEFINED # Install protocol
>    gPerformanceExProtocolGuid
> +  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
> +  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
> +  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
> +  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
> +  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
>
>  [Pcd]
> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
> -  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
> +  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
> +  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
> +  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
> index f1540d8..7e79675 100644
> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
> @@ -2,11 +2,11 @@
>    Master header files for DxeCorePerformanceLib instance.
>
>    This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
>    library instance at its constructor.
>
> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  This program and the accompanying materials
>  are licensed and made available under the terms and conditions of the BSD License
>  which accompanies this distribution.  The full text of the license may be found at
>  http://opensource.org/licenses/bsd-license.php
>
> @@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>
>
>  #include <PiDxe.h>
>
>  #include <Guid/Performance.h>
> +#include <Guid/ExtendedFirmwarePerformance.h>
> +#include <Guid/ZeroGuid.h>
> +#include <Guid/EventGroup.h>
> +#include <Guid/FirmwarePerformance.h>
> +#include <Guid/PiSmmCommunicationRegionTable.h>
> +
> +#include <Protocol/DriverBinding.h>
> +#include <Protocol/LoadedImage.h>
> +#include <Protocol/ComponentName2.h>
> +#include <Protocol/DevicePathToText.h>
> +#include <Protocol/SmmCommunication.h>
>
>  #include <Library/PerformanceLib.h>
>  #include <Library/DebugLib.h>
>  #include <Library/HobLib.h>
>  #include <Library/BaseLib.h>
>  #include <Library/BaseMemoryLib.h>
>  #include <Library/TimerLib.h>
>  #include <Library/PcdLib.h>
>  #include <Library/UefiBootServicesTableLib.h>
> +#include <Library/UefiRuntimeServicesTableLib.h>
>  #include <Library/MemoryAllocationLib.h>
>  #include <Library/UefiLib.h>
> +#include <Library/ReportStatusCodeLib.h>
> +#include <Library/DxeServicesLib.h>
> +#include <Library/PeCoffGetEntryPointLib.h>
>
>  //
>  // Interface declarations for PerformanceEx Protocol.
>  //
>  /**
> --
> 1.9.5.msysgit.1
>
> _______________________________________________
> edk2-devel mailing list
> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel
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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Bi, Dandan 6 years, 7 months ago
Sorry for the delayed response.

The allocated  performance table ( below 4G ) is to save the boot performance data in normal boot and S3 phase.
PEIM FirmwarePerformancePei will get the address of the performance table and update the performance date of S3 phase to the table.
The address need to be handled in PEI phase(32bit), that's the main reason why we allocate it below 4G.


Thanks,
Dandan

-----Original Message-----
From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org] 
Sent: Wednesday, May 2, 2018 12:27 AM
To: Bi, Dandan <dandan.bi@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>
Cc: edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase

On 30 January 2018 at 14:53, Dandan Bi <dandan.bi@intel.com> wrote:
> V2:
> Update DxecorePerformanceLib to report the boot performance table
> address instead of records contents.
>
> Updated to convert Pref entry to FPDT record in DXE phase and then
> allocate boot performance table to save the record and report
> the address of boot performance table to FirmwarePerformanceDxe.
>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Star Zeng <star.zeng@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Dandan Bi <dandan.bi@intel.com>
> ---
>  .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
>  .../DxeCorePerformanceLib.inf                      |   20 +-
>  .../DxeCorePerformanceLibInternal.h                |   17 +-
>  3 files changed, 1108 insertions(+), 318 deletions(-)
>
> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
> index 7c0e207..c6f8a16 100644
> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
> @@ -8,11 +8,11 @@
>    which are consumed by DxePerformanceLib to logging performance data in DXE phase.
>
>    This library is mainly used by DxeCore to start performance logging to ensure that
>    Performance Protocol is installed at the very beginning of DXE phase.
>
> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>  This program and the accompanying materials
>  are licensed and made available under the terms and conditions of the BSD License
>  which accompanies this distribution.  The full text of the license may be found at
>  http://opensource.org/licenses/bsd-license.php
> @@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>  **/
>
>
>  #include "DxeCorePerformanceLibInternal.h"
>
> -
>  //
> -// The data structure to hold global performance data.
> +// Data for FPDT performance records.
>  //
> -GAUGE_DATA_HEADER    *mGaugeData;
> +#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
> +#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
> +#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
> +#define FIRMWARE_RECORD_BUFFER  0x10000
> +#define CACHE_HANDLE_GUID_COUNT 0x1000
> +
> +BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
> +BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
> +  {
> +    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
> +    sizeof (BOOT_PERFORMANCE_TABLE)
> +  },
> +  {
> +    {
> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
> +      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
> +    },
> +    0,  // Reserved
> +    //
> +    // These values will be updated at runtime.
> +    //
> +    0,  // ResetEnd
> +    0,  // OsLoaderLoadImageStart
> +    0,  // OsLoaderStartImageStart
> +    0,  // ExitBootServicesEntry
> +    0   // ExitBootServicesExit
> +  }
> +};
>
> -//
> -// The current maximum number of logging entries. If current number of
> -// entries exceeds this value, it will re-allocate a larger array and
> -// migration the old data to the larger array.
> -//
> -UINT32               mMaxGaugeRecords;
> +typedef struct {
> +  EFI_HANDLE    Handle;
> +  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
> +  EFI_GUID      ModuleGuid;
> +} HANDLE_GUID_MAP;
>
> -//
> -// The handle to install Performance Protocol instance.
> -//
> -EFI_HANDLE           mHandle = NULL;
> +HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
> +UINTN           mCachePairCount = 0;
> +
> +UINT32  mLoadImageCount       = 0;
> +UINT32  mPerformanceLength    = 0;
> +UINT32  mMaxPerformanceLength = 0;
> +UINT32  mBootRecordSize       = 0;
> +UINT32  mBootRecordMaxSize    = 0;
> +
> +BOOLEAN mFpdtBufferIsReported = FALSE;
> +BOOLEAN mLackSpaceIsReported  = FALSE;
> +CHAR8   *mPlatformLanguage    = NULL;
> +UINT8   *mPerformancePointer  = NULL;
> +UINT8   *mBootRecordBuffer    = NULL;
> +
> +EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
>
>  //
>  // Interfaces for Performance Protocol.
>  //
>  PERFORMANCE_PROTOCOL mPerformanceInterface = {
> @@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
>    GetGaugeEx
>    };
>
>  PERFORMANCE_PROPERTY  mPerformanceProperty;
>
> -//
> -//  Gauge record lock to avoid data corruption or even memory overflow
> -//
> -STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
> +/**
> +Check whether the Token is a known one which is uesed by core.
> +
> +@param  Token      Pointer to a Null-terminated ASCII string
> +
> +@retval TRUE       Is a known one used by core.
> +@retval FALSE      Not a known one.
> +
> +**/
> +BOOLEAN
> +IsKnownTokens (
> +  IN CONST CHAR8  *Token
> +  )
> +{
> +  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
> +      AsciiStrCmp (Token, PEI_TOK) == 0 ||
> +      AsciiStrCmp (Token, DXE_TOK) == 0 ||
> +      AsciiStrCmp (Token, BDS_TOK) == 0 ||
> +      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
> +      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
> +      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
> +      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
> +      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
> +      AsciiStrCmp (Token, PEIM_TOK) == 0) {
> +    return TRUE;
> +  } else {
> +    return FALSE;
> +  }
> +}
> +
> +/**
> +Check whether the ID is a known one which map to the known Token.
> +
> +@param  Identifier  32-bit identifier.
> +
> +@retval TRUE        Is a known one used by core.
> +@retval FALSE       Not a known one.
> +
> +**/
> +BOOLEAN
> +IsKnownID (
> +  IN UINT32       Identifier
> +  )
> +{
> +  if (Identifier == MODULE_START_ID ||
> +      Identifier == MODULE_END_ID ||
> +      Identifier == MODULE_LOADIMAGE_START_ID ||
> +      Identifier == MODULE_LOADIMAGE_END_ID ||
> +      Identifier == MODULE_DB_START_ID ||
> +      Identifier == MODULE_DB_END_ID ||
> +      Identifier == MODULE_DB_SUPPORT_START_ID ||
> +      Identifier == MODULE_DB_SUPPORT_END_ID ||
> +      Identifier == MODULE_DB_STOP_START_ID ||
> +      Identifier == MODULE_DB_STOP_END_ID) {
> +    return TRUE;
> +  } else {
> +    return FALSE;
> +  }
> +}
>
>  /**
> -  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
> +  Allocate EfiReservedMemoryType below 4G memory address.
> +
> +  This function allocates EfiReservedMemoryType below 4G memory address.
> +
> +  @param[in]  Size   Size of memory to allocate.
> +
> +  @return Allocated address for output.
> +
> +**/
> +VOID *
> +FpdtAllocateReservedMemoryBelow4G (
> +  IN UINTN       Size
> +  )
> +{
> +  UINTN                 Pages;
> +  EFI_PHYSICAL_ADDRESS  Address;
> +  EFI_STATUS            Status;
> +  VOID                  *Buffer;
> +
> +  Buffer  = NULL;
> +  Pages   = EFI_SIZE_TO_PAGES (Size);
> +  Address = 0xffffffff;
> +
> +  Status = gBS->AllocatePages (
> +                  AllocateMaxAddress,
> +                  EfiReservedMemoryType,
> +                  Pages,
> +                  &Address
> +                  );
> +  ASSERT_EFI_ERROR (Status);

This code is breaking DEBUG builds on ARM systems that have no memory
below 4 GB.

> +
> +  if (!EFI_ERROR (Status)) {
> +    Buffer = (VOID *) (UINTN) Address;
> +    ZeroMem (Buffer, Size);
> +  }
> +
> +  return Buffer;
> +}
> +
> +/**
> +  Allocate buffer for Boot Performance table.
> +
> +  @return Status code.
> +
> +**/
> +EFI_STATUS
> +AllocateBootPerformanceTable (
> +  )
> +{
> +  EFI_STATUS                    Status;
> +  UINTN                         Size;
> +  UINT8                         *SmmBootRecordCommBuffer;
> +  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
> +  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
> +  UINTN                         CommSize;
> +  UINTN                         BootPerformanceDataSize;
> +  UINT8                         *BootPerformanceData;
> +  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
> +  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
> +  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
> +  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
> +  UINTN                         Index;
> +  VOID                          *SmmBootRecordData;
> +  UINTN                         SmmBootRecordDataSize;
> +  UINTN                         ReservedMemSize;
> +
> +  //
> +  // Collect boot records from SMM drivers.
> +  //
> +  SmmBootRecordCommBuffer = NULL;
> +  SmmCommData             = NULL;
> +  SmmBootRecordData       = NULL;
> +  SmmBootRecordDataSize   = 0;
> +  ReservedMemSize         = 0;
> +  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
> +  if (!EFI_ERROR (Status)) {
> +    //
> +    // Initialize communicate buffer
> +    // Get the prepared Reserved Memory Range
> +    //
> +    Status = EfiGetSystemConfigurationTable (
> +              &gEdkiiPiSmmCommunicationRegionTableGuid,
> +              (VOID **) &SmmCommRegionTable
> +              );
> +    if (!EFI_ERROR (Status)) {
> +      ASSERT (SmmCommRegionTable != NULL);
> +      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
> +      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
> +        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
> +          break;
> +        }
> +        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
> +      }
> +      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
> +      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
> +      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
> +      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
> +
> +      //
> +      // Check enough reserved memory space
> +      //
> +      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
> +        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
> +        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
> +        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
> +        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
> +
> +        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
> +        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
> +        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
> +
> +        //
> +        // Get the size of boot records.
> +        //
> +        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
> +        SmmCommData->BootRecordData = NULL;
> +        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
> +        ASSERT_EFI_ERROR (Status);
> +
> +        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
> +          //
> +          // Get all boot records
> +          //
> +          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
> +          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
> +          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
> +          ASSERT (SmmBootRecordData  != NULL);
> +          SmmCommData->BootRecordOffset = 0;
> +          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
> +          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
> +          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
> +            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
> +            ASSERT_EFI_ERROR (Status);
> +            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
> +            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
> +            } else {
> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
> +            }
> +            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
> +          }
> +        }
> +      }
> +    }
> +  }
> +
> +  //
> +  // Prepare memory for Boot Performance table.
> +  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
> +  //
> +  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
> +  if (SmmCommData != NULL) {
> +    BootPerformanceDataSize += SmmBootRecordDataSize;
> +  }
> +
> +  //
> +  // Try to allocate the same runtime buffer as last time boot.
> +  //
> +  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
> +  Size = sizeof (PerformanceVariable);
> +  Status = gRT->GetVariable (
> +                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
> +                  &gEfiFirmwarePerformanceGuid,
> +                  NULL,
> +                  &Size,
> +                  &PerformanceVariable
> +                  );
> +  if (!EFI_ERROR (Status)) {
> +    Status = gBS->AllocatePages (
> +                    AllocateAddress,
> +                    EfiReservedMemoryType,
> +                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
> +                    &PerformanceVariable.BootPerformanceTablePointer
> +                    );
> +    if (!EFI_ERROR (Status)) {
> +      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
> +    }
> +  }
> +
> +  if (mAcpiBootPerformanceTable == NULL) {
> +    //
> +    // Fail to allocate at specified address, continue to allocate at any address.
> +    //
> +    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);

Why does this allocation need to live below 4 GB?

If there is no good reason, can we please get rid of this?
If there is a good reason, can we please document it in the code?

> +  }
> +  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
> +
> +  if (mAcpiBootPerformanceTable == NULL) {
> +    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
> +      FreePool (SmmBootRecordData);
> +    }
> +    return EFI_OUT_OF_RESOURCES;
> +  }
> +
> +  //
> +  // Prepare Boot Performance Table.
> +  //
> +  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
> +  //
> +  // Fill Basic Boot record to Boot Performance Table.
> +  //
> +  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
> +  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
> +  //
> +  // Fill Boot records from boot drivers.
> +  //
> +  if (mPerformancePointer != NULL) {
> +    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
> +    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
> +    BootPerformanceData = BootPerformanceData + mPerformanceLength;
> +  }
> +  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
> +    //
> +    // Fill Boot records from SMM drivers.
> +    //
> +    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
> +    FreePool (SmmBootRecordData);
> +    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
> +    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
> +  }
> +
> +  //
> +  // Save Boot Performance Table address to Variable for use in S4 resume.
> +  //
> +  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
> +
> +  //
> +  // Save Runtime Performance Table pointers to Variable.
> +  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
> +  //
> +  gRT->SetVariable (
> +        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
> +        &gEfiFirmwarePerformanceGuid,
> +        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
> +        sizeof (PerformanceVariable),
> +        &PerformanceVariable
> +        );
> +
> +  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
> +  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
> +  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
> +
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Get a human readable module name and module guid for the given image handle.
> +  If module name can't be found, "" string will return.
> +  If module guid can't be found, Zero Guid will return.
> +
> +  @param    Handle        Image handle or Controller handle.
> +  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
> +  @param    BufferSize    Size of the input NameString buffer.
> +  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
> +
> +  @retval EFI_SUCCESS     Successfully get module name and guid.
> +  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
> +  @retval other value  Module Name can't be got.
> +**/
> +EFI_STATUS
> +GetModuleInfoFromHandle (
> +  IN EFI_HANDLE  Handle,
> +  OUT CHAR8            *NameString,
> +  IN UINTN             BufferSize,
> +  OUT EFI_GUID         *ModuleGuid OPTIONAL
> +  )
> +{
> +  EFI_STATUS                  Status;
> +  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
> +  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
> +  CHAR8                       *PdbFileName;
> +  EFI_GUID                    *TempGuid;
> +  UINTN                       StartIndex;
> +  UINTN                       Index;
> +  INTN                        Count;
> +  BOOLEAN                     ModuleGuidIsGet;
> +  UINTN                       StringSize;
> +  CHAR16                      *StringPtr;
> +  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
> +  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
> +
> +  if (NameString == NULL || BufferSize == 0) {
> +    return EFI_INVALID_PARAMETER;
> +  }
> +  //
> +  // Try to get the ModuleGuid and name string form the caached array.
> +  //
> +  if (mCachePairCount > 0) {
> +    for (Count = mCachePairCount -1; Count >= 0; Count--) {
> +      if (Handle == mCacheHandleGuidTable[Count].Handle) {
> +        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
> +        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
> +        return EFI_SUCCESS;
> +      }
> +    }
> +  }
> +
> +  Status = EFI_INVALID_PARAMETER;
> +  LoadedImage     = NULL;
> +  ModuleGuidIsGet = FALSE;
> +
> +  //
> +  // Initialize GUID as zero value.
> +  //
> +  TempGuid    = &gZeroGuid;
> +  //
> +  // Initialize it as "" string.
> +  //
> +  NameString[0] = 0;
> +
> +  if (Handle != NULL) {
> +    //
> +    // Try Handle as ImageHandle.
> +    //
> +    Status = gBS->HandleProtocol (
> +                  Handle,
> +                  &gEfiLoadedImageProtocolGuid,
> +                  (VOID**) &LoadedImage
> +                  );
> +
> +    if (EFI_ERROR (Status)) {
> +      //
> +      // Try Handle as Controller Handle
> +      //
> +      Status = gBS->OpenProtocol (
> +                    Handle,
> +                    &gEfiDriverBindingProtocolGuid,
> +                    (VOID **) &DriverBinding,
> +                    NULL,
> +                    NULL,
> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
> +                    );
> +      if (!EFI_ERROR (Status)) {
> +        //
> +        // Get Image protocol from ImageHandle
> +        //
> +        Status = gBS->HandleProtocol (
> +                      DriverBinding->ImageHandle,
> +                      &gEfiLoadedImageProtocolGuid,
> +                      (VOID**) &LoadedImage
> +                      );
> +      }
> +    }
> +  }
> +
> +  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
> +    //
> +    // Get Module Guid from DevicePath.
> +    //
> +    if (LoadedImage->FilePath != NULL &&
> +        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
> +        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
> +       ) {
> +      //
> +      // Determine GUID associated with module logging performance
> +      //
> +      ModuleGuidIsGet = TRUE;
> +      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
> +      TempGuid        = &FvFilePath->FvFileName;
> +    }
> +
> +    //
> +    // Method 1 Get Module Name from PDB string.
> +    //
> +    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
> +    if (PdbFileName != NULL && BufferSize > 0) {
> +      StartIndex = 0;
> +      for (Index = 0; PdbFileName[Index] != 0; Index++) {
> +        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
> +          StartIndex = Index + 1;
> +        }
> +      }
> +      //
> +      // Copy the PDB file name to our temporary string.
> +      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
> +      //
> +      for (Index = 0; Index < BufferSize - 1; Index++) {
> +        NameString[Index] = PdbFileName[Index + StartIndex];
> +        if (NameString[Index] == 0 || NameString[Index] == '.') {
> +          NameString[Index] = 0;
> +          break;
> +        }
> +      }
>
> -  This internal function searches for the gauge entry in the gauge array.
> -  If there is an entry that exactly matches the given keywords
> -  and its end time stamp is zero, then the index of that gauge entry is returned;
> -  otherwise, the the number of gauge entries in the array is returned.
> +      if (Index == BufferSize - 1) {
> +        NameString[Index] = 0;
> +      }
> +      //
> +      // Module Name is got.
> +      //
> +      goto Done;
> +    }
> +  }
>
> +  //
> +  // Method 2: Get the name string from ComponentName2 protocol
> +  //
> +  Status = gBS->HandleProtocol (
> +                  Handle,
> +                  &gEfiComponentName2ProtocolGuid,
> +                  (VOID **) &ComponentName2
> +                  );
> +  if (!EFI_ERROR (Status)) {
> +    //
> +    // Get the current platform language setting
> +    //
> +    if (mPlatformLanguage == NULL) {
> +      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
> +    }
> +    if (mPlatformLanguage != NULL) {
> +      Status = ComponentName2->GetDriverName (
> +                                 ComponentName2,
> +                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
> +                                 &StringPtr
> +                                 );
> +      if (!EFI_ERROR (Status)) {
> +        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
> +          NameString[Index] = (CHAR8) StringPtr[Index];
> +        }
> +        NameString[Index] = 0;
> +        //
> +        // Module Name is got.
> +        //
> +        goto Done;
> +      }
> +    }
> +  }
> +
> +  if (ModuleGuidIsGet) {
> +    //
> +    // Method 3 Try to get the image's FFS UI section by image GUID
> +    //
> +    StringPtr  = NULL;
> +    StringSize = 0;
> +    Status = GetSectionFromAnyFv (
> +              TempGuid,
> +              EFI_SECTION_USER_INTERFACE,
> +              0,
> +              (VOID **) &StringPtr,
> +              &StringSize
> +              );
> +
> +    if (!EFI_ERROR (Status)) {
> +      //
> +      // Method 3. Get the name string from FFS UI section
> +      //
> +      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
> +        NameString[Index] = (CHAR8) StringPtr[Index];
> +      }
> +      NameString[Index] = 0;
> +      FreePool (StringPtr);
> +    }
> +  }
> +
> +Done:
> +  //
> +  // Copy Module Guid
> +  //
> +  if (ModuleGuid != NULL) {
> +    CopyGuid (ModuleGuid, TempGuid);
> +    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
> +        // Handle is GUID
> +      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
> +    }
> +  }
> +
> +  //
> +  // Cache the Handle and Guid pairs.
> +  //
> +  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
> +    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
> +    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
> +    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
> +    mCachePairCount ++;
> +  }
> +
> +  return Status;
> +}
> +
> +/**
> +  Get the FPDT record info.
> +
> +  @param  IsStart                 TRUE if the performance log is start log.
>    @param  Handle                  Pointer to environment specific context used
>                                    to identify the component being measured.
>    @param  Token                   Pointer to a Null-terminated ASCII string
>                                    that identifies the component being measured.
>    @param  Module                  Pointer to a Null-terminated ASCII string
>                                    that identifies the module being measured.
> -  @param  Identifier              32-bit identifier.
> +  @param  RecordInfo              On return, pointer to the info of the record.
> +  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
> +                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
>
> -  @retval The index of gauge entry in the array.
> +  @retval EFI_SUCCESS          Get record info successfully.
> +  @retval EFI_UNSUPPORTED      No matched FPDT record.
>
>  **/
> -UINT32
> -InternalSearchForGaugeEntry (
> -  IN CONST VOID                 *Handle,  OPTIONAL
> -  IN CONST CHAR8                *Token,   OPTIONAL
> -  IN CONST CHAR8                *Module,   OPTIONAL
> -  IN UINT32                     Identifier
> +EFI_STATUS
> +GetFpdtRecordInfo (
> +  IN BOOLEAN                  IsStart,
> +  IN CONST VOID               *Handle,
> +  IN CONST CHAR8              *Token,
> +  IN CONST CHAR8              *Module,
> +  OUT BASIC_RECORD_INFO       *RecordInfo,
> +  IN OUT BOOLEAN              *UseModuleName
>    )
>  {
> -  UINT32                    Index;
> -  UINT32                    Index2;
> -  UINT32                    NumberOfEntries;
> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
> +  UINT16              RecordType;
> +  UINTN               StringSize;
>
> -  if (Token == NULL) {
> -    Token = "";
> -  }
> -  if (Module == NULL) {
> -    Module = "";
> +  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
> +
> +  //
> +  // Token to Type and Id.
> +  //
> +  if (Token != NULL) {
> +    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
> +      *UseModuleName = TRUE;
> +      RecordType     = GUID_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
> +      *UseModuleName = TRUE;
> +      RecordType = GUID_QWORD_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
> +      *UseModuleName = TRUE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_DB_START_ID;
> +        RecordType   = GUID_QWORD_EVENT_TYPE;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_DB_END_ID;
> +        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
> +      }
> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
> +      *UseModuleName = TRUE;
> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
> +        return RETURN_UNSUPPORTED;
> +      }
> +      RecordType     = GUID_QWORD_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
> +      *UseModuleName = TRUE;
> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
> +         return RETURN_UNSUPPORTED;
> +      }
> +      RecordType     = GUID_QWORD_EVENT_TYPE;
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
> +      }
> +    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
> +               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
> +               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
> +      }
> +    } else {                                                          // Pref used in Modules.
> +      if (IsStart) {
> +        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
> +      } else {
> +        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
> +      }
> +    }
> +  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
> +    if (IsStart) {
> +      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
> +    } else {
> +      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
> +    }
> +  } else {
> +    return EFI_UNSUPPORTED;
>    }
>
> -  NumberOfEntries = mGaugeData->NumberOfEntries;
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> +  //
> +  // Get Record size baesed on the record type.
> +  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
> +  //
> +  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
> +    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
> +    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
> +  } else {
> +    switch (RecordType) {
> +    case GUID_EVENT_TYPE:
> +      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
> +      break;
>
> -  Index2 = 0;
> +    case DYNAMIC_STRING_EVENT_TYPE:
> +      if (*UseModuleName) {
> +        StringSize  = STRING_SIZE;
> +      } else if (Token  != NULL) {
> +        StringSize  = AsciiStrSize (Token);
> +      } else if (Module != NULL) {
> +        StringSize  = AsciiStrSize (Module);
> +      } else {
> +        StringSize  = STRING_SIZE;
> +      }
> +      if (StringSize > STRING_SIZE) {
> +        StringSize   = STRING_SIZE;
> +      }
> +      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
> +      break;
>
> -  for (Index = 0; Index < NumberOfEntries; Index++) {
> -    Index2 = NumberOfEntries - 1 - Index;
> -    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
> -        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
> -      Index = Index2;
> +    case GUID_QWORD_EVENT_TYPE:
> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
>        break;
> +
> +    case GUID_QWORD_STRING_EVENT_TYPE:
> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
> +      break;
> +
> +    default:
> +      //
> +      // Record is unsupported yet, return EFI_UNSUPPORTED
> +      //
> +      return EFI_UNSUPPORTED;
>      }
>    }
>
> -  return Index;
> +  RecordInfo->Type = RecordType;
> +  return EFI_SUCCESS;
>  }
>
>  /**
> -  Adds a record at the end of the performance measurement log
> -  that records the start time of a performance measurement.
> -
> -  Adds a record to the end of the performance measurement log
> -  that contains the Handle, Token, Module and Identifier.
> -  The end time of the new record must be set to zero.
> -  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
> -  If TimeStamp is zero, the start time in the record is filled in with the value
> -  read from the current time stamp.
> +  Add performance log to FPDT boot record table.
>
> +  @param  IsStart                 TRUE if the performance log is start log.
>    @param  Handle                  Pointer to environment specific context used
>                                    to identify the component being measured.
>    @param  Token                   Pointer to a Null-terminated ASCII string
>                                    that identifies the component being measured.
>    @param  Module                  Pointer to a Null-terminated ASCII string
>                                    that identifies the module being measured.
> -  @param  TimeStamp               64-bit time stamp.
> +  @param  Ticker                  64-bit time stamp.
>    @param  Identifier              32-bit identifier. If the value is 0, the created record
>                                    is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>
> -  @retval EFI_SUCCESS             The data was read correctly from the device.
> +  @retval EFI_SUCCESS             Add FPDT boot record.
>    @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
> +  @retval EFI_UNSUPPORTED         No matched FPDT record.
>
>  **/
>  EFI_STATUS
> -EFIAPI
> -StartGaugeEx (
> +InsertFpdtMeasurement (
> +  IN BOOLEAN      IsStart,
>    IN CONST VOID   *Handle,  OPTIONAL
>    IN CONST CHAR8  *Token,   OPTIONAL
>    IN CONST CHAR8  *Module,  OPTIONAL
> -  IN UINT64       TimeStamp,
> +  IN UINT64       Ticker,
>    IN UINT32       Identifier
>    )
>  {
> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
> -  UINTN                     GaugeDataSize;
> -  GAUGE_DATA_HEADER         *NewGaugeData;
> -  UINTN                     OldGaugeDataSize;
> -  GAUGE_DATA_HEADER         *OldGaugeData;
> -  UINT32                    Index;
> -  EFI_STATUS                Status;
> +  EFI_GUID                     ModuleGuid;
> +  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
> +  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
> +  EFI_STATUS                   Status;
> +  FPDT_RECORD_PTR              FpdtRecordPtr;
> +  BASIC_RECORD_INFO            RecordInfo;
> +  UINT64                       TimeStamp;
> +  UINTN                        DestMax;
> +  UINTN                        StrLength;
> +  CONST CHAR8                  *StringPtr;
> +  BOOLEAN                      UseModuleName;
> +
> +  StringPtr     = NULL;
> +  UseModuleName = FALSE;
> +  ZeroMem (ModuleName, sizeof (ModuleName));
> +  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
>
> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
> +  //
> +  // Get record info (type, size, ProgressID and Module Guid).
> +  //
> +  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
>    if (EFI_ERROR (Status)) {
>      return Status;
>    }
>
> -  Index = mGaugeData->NumberOfEntries;
> -  if (Index >= mMaxGaugeRecords) {
> +  //
> +  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
> +  // !!! Note: If the Pref is not the known Token used in the core but have same
> +  // ID with the core Token, this case will not be supported.
> +  // And in currtnt usage mode, for the unkown ID, there is a general rule:
> +  // If it is start pref: the lower 4 bits of the ID should be 0.
> +  // If it is end pref: the lower 4 bits of the ID should not be 0.
> +  // If input ID doesn't follow the rule, we will adjust it.
> +  //
> +  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
> +    return EFI_UNSUPPORTED;
> +  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
> +    if (IsStart && ((Identifier & 0x000F) != 0)) {
> +      Identifier &= 0xFFF0;
> +    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
> +      Identifier += 1;
> +    }
> +    RecordInfo.ProgressID = (UINT16)Identifier;
> +  }
> +
> +  if (mFpdtBufferIsReported) {
> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
> +  } else {
> +    //
> +    // Check if pre-allocated buffer is full
>      //
> -    // Try to enlarge the scale of gauge array.
> +    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
> +      mPerformancePointer = ReallocatePool (
> +                              mPerformanceLength,
> +                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
> +                              mPerformancePointer
> +                              );
> +
> +      if (mPerformancePointer == NULL) {
> +        return EFI_OUT_OF_RESOURCES;
> +      }
> +      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
> +    }
>      //
> -    OldGaugeData      = mGaugeData;
> -    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
> +    // Covert buffer to FPDT Ptr Union type.
> +    //
> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
> +  }
> +  FpdtRecordPtr.RecordHeader->Length = 0;
>
> -    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
> +  //
> +  // Get the TimeStamp.
> +  //
> +  if (Ticker == 0) {
> +    Ticker    = GetPerformanceCounter ();
> +    TimeStamp = GetTimeInNanoSecond (Ticker);
> +  } else if (Ticker == 1) {
> +    TimeStamp = 0;
> +  } else {
> +    TimeStamp = GetTimeInNanoSecond (Ticker);
> +  }
>
> -    NewGaugeData = AllocateZeroPool (GaugeDataSize);
> -    if (NewGaugeData == NULL) {
> -      EfiReleaseLock (&mPerfRecordLock);
> -      return EFI_OUT_OF_RESOURCES;
> +  //
> +  // Get the ModuleName and ModuleGuid form the handle.
> +  //
> +  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
> +
> +  //
> +  // Fill in the record information.
> +  //
> +  switch (RecordInfo.Type) {
> +  case GUID_EVENT_TYPE:
> +    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
> +    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
> +    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
> +    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
> +    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
> +    break;
> +
> +  case DYNAMIC_STRING_EVENT_TYPE:
> +    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
> +    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
> +    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
> +    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
> +    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
> +
> +    if (UseModuleName) {
> +      StringPtr     = ModuleName;
> +    } else if (Token != NULL) {
> +      StringPtr     = Token;
> +    } else if (Module != NULL) {
> +      StringPtr     = Module;
> +    } else if (ModuleName != NULL) {
> +      StringPtr     = ModuleName;
> +    }
> +    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
> +      StrLength     = AsciiStrLen (StringPtr);
> +      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
> +      if (StrLength >= DestMax) {
> +        StrLength   = DestMax -1;
> +      }
> +      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
>      }
> +    break;
> +
> +  case GUID_QWORD_EVENT_TYPE:
> +    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
> +    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
> +    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
> +    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
> +    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
> +    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
> +      mLoadImageCount++;
> +      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
> +    }
> +    break;
> +
> +  case GUID_QWORD_STRING_EVENT_TYPE:
> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
> +    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
> +    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
> +    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
> +    break;
> +
> +  default:
> +    //
> +    // Record is not supported in current DXE phase, return EFI_ABORTED
> +    //
> +    return EFI_UNSUPPORTED;
> +  }
> +
> +  //
> +  // Report record one by one after records have been reported together.
> +  //
> +  if (mFpdtBufferIsReported) {
> +      //
> +      // Append Boot records to the boot performance table.
> +      //
> +      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
> +        if (!mLackSpaceIsReported) {
> +          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
> +          mLackSpaceIsReported = TRUE;
> +        }
> +        return EFI_OUT_OF_RESOURCES;
> +      } else {
> +        //
> +        // Save boot record into BootPerformance table
> +        //
> +        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
> +        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
> +        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
> +      }
> +  } else {
> +    //
> +    // Update the cached FPDT record buffer.
> +    //
> +    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
> +  }
> +
> +  return EFI_SUCCESS;
> +}
> +
> +/**
> +  Dumps all the PEI performance.
> +
> +  @param  HobStart      A pointer to a Guid.
>
> -    mGaugeData = NewGaugeData;
> -    mMaxGaugeRecords *= 2;
> +  This internal function dumps all the PEI performance log to the DXE performance gauge array.
> +  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
> +  to DXE performance data structures.
>
> +**/
> +VOID
> +InternalGetPeiPerformance (
> +  VOID  *HobStart
> +  )
> +{
> +  UINT8                                *FirmwarePerformanceHob;
> +  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
> +  UINT8                                *EventRec;
> +  EFI_HOB_GUID_TYPE                    *GuidHob;
> +
> +  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
> +  while (GuidHob != NULL) {
> +    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
> +    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
> +
> +    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
> +      mPerformancePointer = ReallocatePool (
> +                              mPerformanceLength,
> +                              mPerformanceLength +
> +                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
> +                              FIRMWARE_RECORD_BUFFER,
> +                              mPerformancePointer
> +                              );
> +      ASSERT (mPerformancePointer != NULL);
> +      mMaxPerformanceLength = mPerformanceLength +
> +                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
> +                              FIRMWARE_RECORD_BUFFER;
> +    }
> +
> +    EventRec = mPerformancePointer + mPerformanceLength;
> +    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
>      //
> -    // Initialize new data array and migrate old data one.
> +    // Update the used buffer size.
>      //
> -    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
> +    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
> +    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
>
> -    FreePool (OldGaugeData);
> +    //
> +    // Get next performance guid hob
> +    //
> +    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
>    }
> +}
>
> -  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
> +/**
> +  Report Boot Perforamnce table address as report status code.
>
> -  if (Token != NULL) {
> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
> -  }
> -  if (Module != NULL) {
> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
> +  @param  Event    The event of notify protocol.
> +  @param  Context  Notify event context.
> +
> +**/
> +VOID
> +EFIAPI
> +ReportFpdtRecordBuffer (
> +  IN EFI_EVENT     Event,
> +  IN VOID          *Context
> +  )
> +{
> +  EFI_STATUS      Status;
> +  UINT64          BPDTAddr;
> +
> +  if (!mFpdtBufferIsReported) {
> +    Status = AllocateBootPerformanceTable ();
> +    if (!EFI_ERROR(Status)) {
> +      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
> +      REPORT_STATUS_CODE_EX (
> +          EFI_PROGRESS_CODE,
> +          EFI_SOFTWARE_DXE_BS_DRIVER,
> +          0,
> +          NULL,
> +          &gEfiFirmwarePerformanceGuid,
> +          &BPDTAddr,
> +          sizeof (UINT64)
> +          );
> +    }
> +    //
> +    // Free Cached FPDT record Buffer
> +    //
> +    if (mPerformancePointer != NULL) {
> +      FreePool (mPerformancePointer);
> +      mPerformancePointer   = NULL;
> +    }
> +    mPerformanceLength    = 0;
> +    mMaxPerformanceLength = 0;
> +    //
> +    // Set FPDT report state to TRUE.
> +    //
> +    mFpdtBufferIsReported = TRUE;
>    }
> +}
>
> -  GaugeEntryExArray[Index].EndTimeStamp = 0;
> -  GaugeEntryExArray[Index].Identifier = Identifier;
> +/**
> +  Adds a record at the end of the performance measurement log
> +  that records the start time of a performance measurement.
>
> -  if (TimeStamp == 0) {
> -    TimeStamp = GetPerformanceCounter ();
> -  }
> -  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
> +  Adds a record to the end of the performance measurement log
> +  that contains the Handle, Token, Module and Identifier.
> +  The end time of the new record must be set to zero.
> +  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
> +  If TimeStamp is zero, the start time in the record is filled in with the value
> +  read from the current time stamp.
>
> -  mGaugeData->NumberOfEntries++;
> +  @param  Handle                  Pointer to environment specific context used
> +                                  to identify the component being measured.
> +  @param  Token                   Pointer to a Null-terminated ASCII string
> +                                  that identifies the component being measured.
> +  @param  Module                  Pointer to a Null-terminated ASCII string
> +                                  that identifies the module being measured.
> +  @param  TimeStamp               64-bit time stamp.
> +  @param  Identifier              32-bit identifier. If the value is 0, the created record
> +                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>
> -  EfiReleaseLock (&mPerfRecordLock);
> +  @retval EFI_SUCCESS             The data was read correctly from the device.
> +  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>
> -  return EFI_SUCCESS;
> +**/
> +EFI_STATUS
> +EFIAPI
> +StartGaugeEx (
> +  IN CONST VOID   *Handle,  OPTIONAL
> +  IN CONST CHAR8  *Token,   OPTIONAL
> +  IN CONST CHAR8  *Module,  OPTIONAL
> +  IN UINT64       TimeStamp,
> +  IN UINT32       Identifier
> +  )
> +{
> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Searches the performance measurement log from the beginning of the log
>    for the first matching record that contains a zero end time and fills in a valid end time.
>
>    Searches the performance measurement log from the beginning of the log
> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>    If the record can not be found then return EFI_NOT_FOUND.
>    If the record is found and TimeStamp is not zero,
>    then the end time in the record is filled in with the value specified by TimeStamp.
>    If the record is found and TimeStamp is zero, then the end time in the matching record
>    is filled in with the current time stamp value.
> @@ -260,89 +1188,19 @@ EndGaugeEx (
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp,
>    IN UINT32       Identifier
>    )
>  {
> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
> -  UINT32              Index;
> -  EFI_STATUS          Status;
> -
> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  if (TimeStamp == 0) {
> -    TimeStamp = GetPerformanceCounter ();
> -  }
> -
> -  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
> -  if (Index >= mGaugeData->NumberOfEntries) {
> -    EfiReleaseLock (&mPerfRecordLock);
> -    return EFI_NOT_FOUND;
> -  }
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
> -
> -  EfiReleaseLock (&mPerfRecordLock);
> -  return EFI_SUCCESS;
> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Retrieves a previously logged performance measurement.
>    It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>    and then assign the Identifier with 0.
>
> -  Retrieves the performance log entry from the performance log specified by LogEntryKey.
> -  If it stands for a valid entry, then EFI_SUCCESS is returned and
> -  GaugeDataEntryEx stores the pointer to that entry.
> -
> -  This internal function is added to avoid releasing lock before each return statement.
> -
> -  @param  LogEntryKey             The key for the previous performance measurement log entry.
> -                                  If 0, then the first performance measurement log entry is retrieved.
> -  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
> -                                  if the retrieval is successful.
> -
> -  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
> -  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
> -  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
> -  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
> -
> -**/
> -EFI_STATUS
> -EFIAPI
> -InternalGetGaugeEx (
> -  IN  UINTN                 LogEntryKey,
> -  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
> -  )
> -{
> -  UINTN               NumberOfEntries;
> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
> -
> -  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
> -  if (LogEntryKey > NumberOfEntries) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -  if (LogEntryKey == NumberOfEntries) {
> -    return EFI_NOT_FOUND;
> -  }
> -
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -
> -  if (GaugeDataEntryEx == NULL) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
> -
> -  return EFI_SUCCESS;
> -}
> -
> -/**
> -  Retrieves a previously logged performance measurement.
> -  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
> -  and then assign the Identifier with 0.
> +    !!! Not support!!!
>
>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>    GaugeDataEntryEx stores the pointer to that entry.
>
> @@ -362,22 +1220,11 @@ EFIAPI
>  GetGaugeEx (
>    IN  UINTN                 LogEntryKey,
>    OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>    )
>  {
> -  EFI_STATUS                Status;
> -
> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
> -
> -  EfiReleaseLock (&mPerfRecordLock);
> -
> -  return Status;
> +  return EFI_UNSUPPORTED;
>  }
>
>  /**
>    Adds a record at the end of the performance measurement log
>    that records the start time of a performance measurement.
> @@ -452,10 +1299,12 @@ EndGauge (
>  /**
>    Retrieves a previously logged performance measurement.
>    It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
>    and then eliminate the Identifier.
>
> +    !!! Not support!!!
> +
>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>    GaugeDataEntry stores the pointer to that entry.
>
>    @param  LogEntryKey             The key for the previous performance measurement log entry.
> @@ -474,81 +1323,13 @@ EFIAPI
>  GetGauge (
>    IN  UINTN               LogEntryKey,
>    OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
>    )
>  {
> -  EFI_STATUS          Status;
> -  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
> -
> -  GaugeEntryEx = NULL;
> -
> -  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
> -  if (EFI_ERROR (Status)) {
> -    return Status;
> -  }
> -
> -  if (GaugeDataEntry == NULL) {
> -    return EFI_INVALID_PARAMETER;
> -  }
> -
> -  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
> -
> -  return EFI_SUCCESS;
> +  return EFI_UNSUPPORTED;
>  }
>
> -/**
> -  Dumps all the PEI performance log to DXE performance gauge array.
> -
> -  This internal function dumps all the PEI performance log to the DXE performance gauge array.
> -  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
> -  to DXE performance data structures.
> -
> -**/
> -VOID
> -InternalGetPeiPerformance (
> -  VOID
> -  )
> -{
> -  EFI_HOB_GUID_TYPE                 *GuidHob;
> -  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
> -  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
> -  UINT32                            *LogIdArray;
> -  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
> -  UINT32                            Index;
> -  UINT32                            NumberOfEntries;
> -
> -  NumberOfEntries = 0;
> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
> -
> -  //
> -  // Dump PEI Log Entries to DXE Guage Data structure.
> -  //
> -  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
> -  if (GuidHob != NULL) {
> -    LogHob          = GET_GUID_HOB_DATA (GuidHob);
> -    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
> -
> -    NumberOfEntries = LogHob->NumberOfEntries;
> -    for (Index = 0; Index < NumberOfEntries; Index++) {
> -      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
> -      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
> -      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
> -      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
> -      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
> -      GaugeEntryExArray[Index].Identifier     = 0;
> -    }
> -
> -    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
> -    if (GuidHob != NULL) {
> -      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
> -      for (Index = 0; Index < NumberOfEntries; Index++) {
> -        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
> -      }
> -    }
> -  }
> -  mGaugeData->NumberOfEntries = NumberOfEntries;
> -}
>
>  /**
>    The constructor function initializes Performance infrastructure for DXE phase.
>
>    The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
> @@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
>    IN EFI_HANDLE        ImageHandle,
>    IN EFI_SYSTEM_TABLE  *SystemTable
>    )
>  {
>    EFI_STATUS                Status;
> +  EFI_HANDLE                Handle;
> +  EFI_EVENT                 ReadyToBootEvent;
>    PERFORMANCE_PROPERTY      *PerformanceProperty;
>
> -
>    if (!PerformanceMeasurementEnabled ()) {
>      //
>      // Do not initialize performance infrastructure if not required.
>      //
>      return EFI_SUCCESS;
>    }
> +
> +  //
> +  // Dump normal PEI performance records
> +  //
> +  InternalGetPeiPerformance (GetHobList());
> +
>    //
> -  // Install the protocol interfaces.
> +  // Install the protocol interfaces for DXE performance library instance.
>    //
> +  Handle = NULL;
>    Status = gBS->InstallMultipleProtocolInterfaces (
> -                  &mHandle,
> +                  &Handle,
>                    &gPerformanceProtocolGuid,
>                    &mPerformanceInterface,
>                    &gPerformanceExProtocolGuid,
>                    &mPerformanceExInterface,
>                    NULL
>                    );
>    ASSERT_EFI_ERROR (Status);
>
> -  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
> -                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
> -                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
> -
> -  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
> -  ASSERT (mGaugeData != NULL);
> +  //
> +  // Register ReadyToBoot event to report StatusCode data
> +  //
> +  Status = gBS->CreateEventEx (
> +                  EVT_NOTIFY_SIGNAL,
> +                  TPL_CALLBACK,
> +                  ReportFpdtRecordBuffer,
> +                  NULL,
> +                  &gEfiEventReadyToBootGuid,
> +                  &ReadyToBootEvent
> +                  );
>
> -  InternalGetPeiPerformance ();
> +  ASSERT_EFI_ERROR (Status);
>
>    Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
>    if (EFI_ERROR (Status)) {
>      //
>      // Install configuration table for performance property.
> @@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp,
>    IN UINT32       Identifier
>    )
>  {
> -  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Searches the performance measurement log from the beginning of the log
>    for the first matching record that contains a zero end time and fills in a valid end time.
>
>    Searches the performance measurement log from the beginning of the log
> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>    If the record can not be found then return RETURN_NOT_FOUND.
>    If the record is found and TimeStamp is not zero,
>    then the end time in the record is filled in with the value specified by TimeStamp.
>    If the record is found and TimeStamp is zero, then the end time in the matching record
>    is filled in with the current time stamp value.
> @@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp,
>    IN UINT32       Identifier
>    )
>  {
> -  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>  }
>
>  /**
>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>    It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
>    and then assign the Identifier with 0.
>
> +    !!! Not support!!!
> +
>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>    and the key for the second entry in the log is returned.  If the performance log is empty,
>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
> @@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
>                                    being measured.
>    @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
>                                    was started.
>    @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
>                                    was ended.
> -  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
> +  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
> +                                  was ended.
>
>    @return The key for the next performance log entry (in general case).
>
>  **/
>  UINTN
>  EFIAPI
>  GetPerformanceMeasurementEx (
> -  IN  UINTN       LogEntryKey,
> +  IN  UINTN       LogEntryKey,
>    OUT CONST VOID  **Handle,
>    OUT CONST CHAR8 **Token,
>    OUT CONST CHAR8 **Module,
>    OUT UINT64      *StartTimeStamp,
>    OUT UINT64      *EndTimeStamp,
>    OUT UINT32      *Identifier
>    )
>  {
> -  EFI_STATUS           Status;
> -  GAUGE_DATA_ENTRY_EX  *GaugeData;
> -
> -  GaugeData = NULL;
> -
> -  ASSERT (Handle != NULL);
> -  ASSERT (Token != NULL);
> -  ASSERT (Module != NULL);
> -  ASSERT (StartTimeStamp != NULL);
> -  ASSERT (EndTimeStamp != NULL);
> -  ASSERT (Identifier != NULL);
> -
> -  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
> -
> -  //
> -  // Make sure that LogEntryKey is a valid log entry key,
> -  //
> -  ASSERT (Status != EFI_INVALID_PARAMETER);
> -
> -  if (EFI_ERROR (Status)) {
> -    //
> -    // The LogEntryKey is the last entry (equals to the total entry number).
> -    //
> -    return 0;
> -  }
> -
> -  ASSERT (GaugeData != NULL);
> -
> -  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
> -  *Token          = GaugeData->Token;
> -  *Module         = GaugeData->Module;
> -  *StartTimeStamp = GaugeData->StartTimeStamp;
> -  *EndTimeStamp   = GaugeData->EndTimeStamp;
> -  *Identifier     = GaugeData->Identifier;
> -
> -  return LogEntryKey;
> +  return 0;
>  }
>
>  /**
>    Adds a record at the end of the performance measurement log
>    that records the start time of a performance measurement.
> @@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
>    IN CONST CHAR8  *Token,   OPTIONAL
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp
>    )
>  {
> -  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
>  }
>
>  /**
>    Searches the performance measurement log from the beginning of the log
>    for the first matching record that contains a zero end time and fills in a valid end time.
> @@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
>    IN CONST CHAR8  *Token,   OPTIONAL
>    IN CONST CHAR8  *Module,  OPTIONAL
>    IN UINT64       TimeStamp
>    )
>  {
> -  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
>  }
>
>  /**
>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>    It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
>    and then eliminate the Identifier.
>
> +  !!! Not support!!!
> +
>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>    and the key for the second entry in the log is returned.  If the performance log is empty,
>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
> @@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
>    OUT CONST CHAR8 **Module,
>    OUT UINT64      *StartTimeStamp,
>    OUT UINT64      *EndTimeStamp
>    )
>  {
> -  UINT32 Identifier;
> -  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
> +  return 0;
>  }
>
>  /**
>    Returns TRUE if the performance measurement macros are enabled.
>
> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
> index 5b89ce2..71c181f 100644
> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
> @@ -7,11 +7,11 @@
>  #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
>  #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
>  #  This library is mainly used by DxeCore to start performance logging to ensure that
>  #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
>  #
> -#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>  #  This program and the accompanying materials
>  #  are licensed and made available under the terms and conditions of the BSD License
>  #  which accompanies this distribution.  The full text of the license may be found at
>  #  http://opensource.org/licenses/bsd-license.php
> @@ -48,27 +48,39 @@
>
>
>  [LibraryClasses]
>    MemoryAllocationLib
>    UefiBootServicesTableLib
> +  UefiRuntimeServicesTableLib
>    PcdLib
>    TimerLib
>    BaseMemoryLib
>    BaseLib
>    HobLib
>    DebugLib
>    UefiLib
> +  ReportStatusCodeLib
> +  DxeServicesLib
> +  PeCoffGetEntryPointLib
> +
> +[Protocols]
> +  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
>
>
>  [Guids]
>    ## SOMETIMES_CONSUMES   ## HOB
>    ## PRODUCES             ## UNDEFINED # Install protocol
>    ## PRODUCES             ## SystemTable
>    gPerformanceProtocolGuid
>    ## SOMETIMES_CONSUMES   ## HOB
>    ## PRODUCES             ## UNDEFINED # Install protocol
>    gPerformanceExProtocolGuid
> +  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
> +  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
> +  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
> +  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
> +  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
>
>  [Pcd]
> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
> -  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
> +  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
> +  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
> +  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
> index f1540d8..7e79675 100644
> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
> @@ -2,11 +2,11 @@
>    Master header files for DxeCorePerformanceLib instance.
>
>    This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
>    library instance at its constructor.
>
> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>  This program and the accompanying materials
>  are licensed and made available under the terms and conditions of the BSD License
>  which accompanies this distribution.  The full text of the license may be found at
>  http://opensource.org/licenses/bsd-license.php
>
> @@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>
>
>  #include <PiDxe.h>
>
>  #include <Guid/Performance.h>
> +#include <Guid/ExtendedFirmwarePerformance.h>
> +#include <Guid/ZeroGuid.h>
> +#include <Guid/EventGroup.h>
> +#include <Guid/FirmwarePerformance.h>
> +#include <Guid/PiSmmCommunicationRegionTable.h>
> +
> +#include <Protocol/DriverBinding.h>
> +#include <Protocol/LoadedImage.h>
> +#include <Protocol/ComponentName2.h>
> +#include <Protocol/DevicePathToText.h>
> +#include <Protocol/SmmCommunication.h>
>
>  #include <Library/PerformanceLib.h>
>  #include <Library/DebugLib.h>
>  #include <Library/HobLib.h>
>  #include <Library/BaseLib.h>
>  #include <Library/BaseMemoryLib.h>
>  #include <Library/TimerLib.h>
>  #include <Library/PcdLib.h>
>  #include <Library/UefiBootServicesTableLib.h>
> +#include <Library/UefiRuntimeServicesTableLib.h>
>  #include <Library/MemoryAllocationLib.h>
>  #include <Library/UefiLib.h>
> +#include <Library/ReportStatusCodeLib.h>
> +#include <Library/DxeServicesLib.h>
> +#include <Library/PeCoffGetEntryPointLib.h>
>
>  //
>  // Interface declarations for PerformanceEx Protocol.
>  //
>  /**
> --
> 1.9.5.msysgit.1
>
> _______________________________________________
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> edk2-devel@lists.01.org
> https://lists.01.org/mailman/listinfo/edk2-devel
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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Ard Biesheuvel 6 years, 7 months ago
(+ Laszlo, Andrew, Mike)

On 22 May 2018 at 02:33, Bi, Dandan <dandan.bi@intel.com> wrote:
> Sorry for the delayed response.
>
> The allocated  performance table ( below 4G ) is to save the boot performance data in normal boot and S3 phase.
> PEIM FirmwarePerformancePei will get the address of the performance table and update the performance date of S3 phase to the table.
> The address need to be handled in PEI phase(32bit), that's the main reason why we allocate it below 4G.
>

The 32-bit PEI + 64-bit DXE combo is specific to X64. You have added
code to a generic library that ASSERT()s if allocating memory below 4
GB fails, breaking non-PC architectures.

So please, fix this. Or at least suggest a way around it so that other
architectures can keep using this library.

This is another consequence of our failure to model the special 32-bit
PEI/64-bit DXE combination using proper PI interfaces, resulting in
these kinds of breakages and open coded 4 GB allocations all
throughout the code. Can we please work on getting this fixed?


> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
> Sent: Wednesday, May 2, 2018 12:27 AM
> To: Bi, Dandan <dandan.bi@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>
> Cc: edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>
> On 30 January 2018 at 14:53, Dandan Bi <dandan.bi@intel.com> wrote:
>> V2:
>> Update DxecorePerformanceLib to report the boot performance table
>> address instead of records contents.
>>
>> Updated to convert Pref entry to FPDT record in DXE phase and then
>> allocate boot performance table to save the record and report
>> the address of boot performance table to FirmwarePerformanceDxe.
>>
>> Cc: Liming Gao <liming.gao@intel.com>
>> Cc: Star Zeng <star.zeng@intel.com>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Dandan Bi <dandan.bi@intel.com>
>> ---
>>  .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
>>  .../DxeCorePerformanceLib.inf                      |   20 +-
>>  .../DxeCorePerformanceLibInternal.h                |   17 +-
>>  3 files changed, 1108 insertions(+), 318 deletions(-)
>>
>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>> index 7c0e207..c6f8a16 100644
>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>> @@ -8,11 +8,11 @@
>>    which are consumed by DxePerformanceLib to logging performance data in DXE phase.
>>
>>    This library is mainly used by DxeCore to start performance logging to ensure that
>>    Performance Protocol is installed at the very beginning of DXE phase.
>>
>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>  This program and the accompanying materials
>>  are licensed and made available under the terms and conditions of the BSD License
>>  which accompanies this distribution.  The full text of the license may be found at
>>  http://opensource.org/licenses/bsd-license.php
>> @@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>  **/
>>
>>
>>  #include "DxeCorePerformanceLibInternal.h"
>>
>> -
>>  //
>> -// The data structure to hold global performance data.
>> +// Data for FPDT performance records.
>>  //
>> -GAUGE_DATA_HEADER    *mGaugeData;
>> +#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
>> +#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
>> +#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
>> +#define FIRMWARE_RECORD_BUFFER  0x10000
>> +#define CACHE_HANDLE_GUID_COUNT 0x1000
>> +
>> +BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
>> +BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
>> +  {
>> +    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
>> +    sizeof (BOOT_PERFORMANCE_TABLE)
>> +  },
>> +  {
>> +    {
>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
>> +      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
>> +    },
>> +    0,  // Reserved
>> +    //
>> +    // These values will be updated at runtime.
>> +    //
>> +    0,  // ResetEnd
>> +    0,  // OsLoaderLoadImageStart
>> +    0,  // OsLoaderStartImageStart
>> +    0,  // ExitBootServicesEntry
>> +    0   // ExitBootServicesExit
>> +  }
>> +};
>>
>> -//
>> -// The current maximum number of logging entries. If current number of
>> -// entries exceeds this value, it will re-allocate a larger array and
>> -// migration the old data to the larger array.
>> -//
>> -UINT32               mMaxGaugeRecords;
>> +typedef struct {
>> +  EFI_HANDLE    Handle;
>> +  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>> +  EFI_GUID      ModuleGuid;
>> +} HANDLE_GUID_MAP;
>>
>> -//
>> -// The handle to install Performance Protocol instance.
>> -//
>> -EFI_HANDLE           mHandle = NULL;
>> +HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
>> +UINTN           mCachePairCount = 0;
>> +
>> +UINT32  mLoadImageCount       = 0;
>> +UINT32  mPerformanceLength    = 0;
>> +UINT32  mMaxPerformanceLength = 0;
>> +UINT32  mBootRecordSize       = 0;
>> +UINT32  mBootRecordMaxSize    = 0;
>> +
>> +BOOLEAN mFpdtBufferIsReported = FALSE;
>> +BOOLEAN mLackSpaceIsReported  = FALSE;
>> +CHAR8   *mPlatformLanguage    = NULL;
>> +UINT8   *mPerformancePointer  = NULL;
>> +UINT8   *mBootRecordBuffer    = NULL;
>> +
>> +EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
>>
>>  //
>>  // Interfaces for Performance Protocol.
>>  //
>>  PERFORMANCE_PROTOCOL mPerformanceInterface = {
>> @@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
>>    GetGaugeEx
>>    };
>>
>>  PERFORMANCE_PROPERTY  mPerformanceProperty;
>>
>> -//
>> -//  Gauge record lock to avoid data corruption or even memory overflow
>> -//
>> -STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
>> +/**
>> +Check whether the Token is a known one which is uesed by core.
>> +
>> +@param  Token      Pointer to a Null-terminated ASCII string
>> +
>> +@retval TRUE       Is a known one used by core.
>> +@retval FALSE      Not a known one.
>> +
>> +**/
>> +BOOLEAN
>> +IsKnownTokens (
>> +  IN CONST CHAR8  *Token
>> +  )
>> +{
>> +  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
>> +      AsciiStrCmp (Token, PEI_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DXE_TOK) == 0 ||
>> +      AsciiStrCmp (Token, BDS_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
>> +      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
>> +      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
>> +      AsciiStrCmp (Token, PEIM_TOK) == 0) {
>> +    return TRUE;
>> +  } else {
>> +    return FALSE;
>> +  }
>> +}
>> +
>> +/**
>> +Check whether the ID is a known one which map to the known Token.
>> +
>> +@param  Identifier  32-bit identifier.
>> +
>> +@retval TRUE        Is a known one used by core.
>> +@retval FALSE       Not a known one.
>> +
>> +**/
>> +BOOLEAN
>> +IsKnownID (
>> +  IN UINT32       Identifier
>> +  )
>> +{
>> +  if (Identifier == MODULE_START_ID ||
>> +      Identifier == MODULE_END_ID ||
>> +      Identifier == MODULE_LOADIMAGE_START_ID ||
>> +      Identifier == MODULE_LOADIMAGE_END_ID ||
>> +      Identifier == MODULE_DB_START_ID ||
>> +      Identifier == MODULE_DB_END_ID ||
>> +      Identifier == MODULE_DB_SUPPORT_START_ID ||
>> +      Identifier == MODULE_DB_SUPPORT_END_ID ||
>> +      Identifier == MODULE_DB_STOP_START_ID ||
>> +      Identifier == MODULE_DB_STOP_END_ID) {
>> +    return TRUE;
>> +  } else {
>> +    return FALSE;
>> +  }
>> +}
>>
>>  /**
>> -  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
>> +  Allocate EfiReservedMemoryType below 4G memory address.
>> +
>> +  This function allocates EfiReservedMemoryType below 4G memory address.
>> +
>> +  @param[in]  Size   Size of memory to allocate.
>> +
>> +  @return Allocated address for output.
>> +
>> +**/
>> +VOID *
>> +FpdtAllocateReservedMemoryBelow4G (
>> +  IN UINTN       Size
>> +  )
>> +{
>> +  UINTN                 Pages;
>> +  EFI_PHYSICAL_ADDRESS  Address;
>> +  EFI_STATUS            Status;
>> +  VOID                  *Buffer;
>> +
>> +  Buffer  = NULL;
>> +  Pages   = EFI_SIZE_TO_PAGES (Size);
>> +  Address = 0xffffffff;
>> +
>> +  Status = gBS->AllocatePages (
>> +                  AllocateMaxAddress,
>> +                  EfiReservedMemoryType,
>> +                  Pages,
>> +                  &Address
>> +                  );
>> +  ASSERT_EFI_ERROR (Status);
>
> This code is breaking DEBUG builds on ARM systems that have no memory
> below 4 GB.
>
>> +
>> +  if (!EFI_ERROR (Status)) {
>> +    Buffer = (VOID *) (UINTN) Address;
>> +    ZeroMem (Buffer, Size);
>> +  }
>> +
>> +  return Buffer;
>> +}
>> +
>> +/**
>> +  Allocate buffer for Boot Performance table.
>> +
>> +  @return Status code.
>> +
>> +**/
>> +EFI_STATUS
>> +AllocateBootPerformanceTable (
>> +  )
>> +{
>> +  EFI_STATUS                    Status;
>> +  UINTN                         Size;
>> +  UINT8                         *SmmBootRecordCommBuffer;
>> +  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
>> +  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
>> +  UINTN                         CommSize;
>> +  UINTN                         BootPerformanceDataSize;
>> +  UINT8                         *BootPerformanceData;
>> +  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
>> +  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
>> +  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
>> +  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
>> +  UINTN                         Index;
>> +  VOID                          *SmmBootRecordData;
>> +  UINTN                         SmmBootRecordDataSize;
>> +  UINTN                         ReservedMemSize;
>> +
>> +  //
>> +  // Collect boot records from SMM drivers.
>> +  //
>> +  SmmBootRecordCommBuffer = NULL;
>> +  SmmCommData             = NULL;
>> +  SmmBootRecordData       = NULL;
>> +  SmmBootRecordDataSize   = 0;
>> +  ReservedMemSize         = 0;
>> +  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
>> +  if (!EFI_ERROR (Status)) {
>> +    //
>> +    // Initialize communicate buffer
>> +    // Get the prepared Reserved Memory Range
>> +    //
>> +    Status = EfiGetSystemConfigurationTable (
>> +              &gEdkiiPiSmmCommunicationRegionTableGuid,
>> +              (VOID **) &SmmCommRegionTable
>> +              );
>> +    if (!EFI_ERROR (Status)) {
>> +      ASSERT (SmmCommRegionTable != NULL);
>> +      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
>> +      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
>> +        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
>> +          break;
>> +        }
>> +        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
>> +      }
>> +      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
>> +      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
>> +      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
>> +      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
>> +
>> +      //
>> +      // Check enough reserved memory space
>> +      //
>> +      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
>> +        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
>> +        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
>> +        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
>> +        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
>> +
>> +        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
>> +        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
>> +        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
>> +
>> +        //
>> +        // Get the size of boot records.
>> +        //
>> +        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
>> +        SmmCommData->BootRecordData = NULL;
>> +        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>> +        ASSERT_EFI_ERROR (Status);
>> +
>> +        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
>> +          //
>> +          // Get all boot records
>> +          //
>> +          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
>> +          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
>> +          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
>> +          ASSERT (SmmBootRecordData  != NULL);
>> +          SmmCommData->BootRecordOffset = 0;
>> +          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
>> +          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
>> +          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
>> +            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>> +            ASSERT_EFI_ERROR (Status);
>> +            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
>> +            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
>> +            } else {
>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
>> +            }
>> +            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
>> +          }
>> +        }
>> +      }
>> +    }
>> +  }
>> +
>> +  //
>> +  // Prepare memory for Boot Performance table.
>> +  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
>> +  //
>> +  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>> +  if (SmmCommData != NULL) {
>> +    BootPerformanceDataSize += SmmBootRecordDataSize;
>> +  }
>> +
>> +  //
>> +  // Try to allocate the same runtime buffer as last time boot.
>> +  //
>> +  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
>> +  Size = sizeof (PerformanceVariable);
>> +  Status = gRT->GetVariable (
>> +                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>> +                  &gEfiFirmwarePerformanceGuid,
>> +                  NULL,
>> +                  &Size,
>> +                  &PerformanceVariable
>> +                  );
>> +  if (!EFI_ERROR (Status)) {
>> +    Status = gBS->AllocatePages (
>> +                    AllocateAddress,
>> +                    EfiReservedMemoryType,
>> +                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
>> +                    &PerformanceVariable.BootPerformanceTablePointer
>> +                    );
>> +    if (!EFI_ERROR (Status)) {
>> +      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
>> +    }
>> +  }
>> +
>> +  if (mAcpiBootPerformanceTable == NULL) {
>> +    //
>> +    // Fail to allocate at specified address, continue to allocate at any address.
>> +    //
>> +    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);
>
> Why does this allocation need to live below 4 GB?
>
> If there is no good reason, can we please get rid of this?
> If there is a good reason, can we please document it in the code?
>
>> +  }
>> +  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
>> +
>> +  if (mAcpiBootPerformanceTable == NULL) {
>> +    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>> +      FreePool (SmmBootRecordData);
>> +    }
>> +    return EFI_OUT_OF_RESOURCES;
>> +  }
>> +
>> +  //
>> +  // Prepare Boot Performance Table.
>> +  //
>> +  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
>> +  //
>> +  // Fill Basic Boot record to Boot Performance Table.
>> +  //
>> +  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
>> +  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
>> +  //
>> +  // Fill Boot records from boot drivers.
>> +  //
>> +  if (mPerformancePointer != NULL) {
>> +    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
>> +    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
>> +    BootPerformanceData = BootPerformanceData + mPerformanceLength;
>> +  }
>> +  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>> +    //
>> +    // Fill Boot records from SMM drivers.
>> +    //
>> +    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
>> +    FreePool (SmmBootRecordData);
>> +    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
>> +    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
>> +  }
>> +
>> +  //
>> +  // Save Boot Performance Table address to Variable for use in S4 resume.
>> +  //
>> +  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
>> +
>> +  //
>> +  // Save Runtime Performance Table pointers to Variable.
>> +  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
>> +  //
>> +  gRT->SetVariable (
>> +        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>> +        &gEfiFirmwarePerformanceGuid,
>> +        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
>> +        sizeof (PerformanceVariable),
>> +        &PerformanceVariable
>> +        );
>> +
>> +  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
>> +  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
>> +  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>> +
>> +  return EFI_SUCCESS;
>> +}
>> +
>> +/**
>> +  Get a human readable module name and module guid for the given image handle.
>> +  If module name can't be found, "" string will return.
>> +  If module guid can't be found, Zero Guid will return.
>> +
>> +  @param    Handle        Image handle or Controller handle.
>> +  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
>> +  @param    BufferSize    Size of the input NameString buffer.
>> +  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
>> +
>> +  @retval EFI_SUCCESS     Successfully get module name and guid.
>> +  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
>> +  @retval other value  Module Name can't be got.
>> +**/
>> +EFI_STATUS
>> +GetModuleInfoFromHandle (
>> +  IN EFI_HANDLE  Handle,
>> +  OUT CHAR8            *NameString,
>> +  IN UINTN             BufferSize,
>> +  OUT EFI_GUID         *ModuleGuid OPTIONAL
>> +  )
>> +{
>> +  EFI_STATUS                  Status;
>> +  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
>> +  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
>> +  CHAR8                       *PdbFileName;
>> +  EFI_GUID                    *TempGuid;
>> +  UINTN                       StartIndex;
>> +  UINTN                       Index;
>> +  INTN                        Count;
>> +  BOOLEAN                     ModuleGuidIsGet;
>> +  UINTN                       StringSize;
>> +  CHAR16                      *StringPtr;
>> +  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
>> +  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
>> +
>> +  if (NameString == NULL || BufferSize == 0) {
>> +    return EFI_INVALID_PARAMETER;
>> +  }
>> +  //
>> +  // Try to get the ModuleGuid and name string form the caached array.
>> +  //
>> +  if (mCachePairCount > 0) {
>> +    for (Count = mCachePairCount -1; Count >= 0; Count--) {
>> +      if (Handle == mCacheHandleGuidTable[Count].Handle) {
>> +        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
>> +        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
>> +        return EFI_SUCCESS;
>> +      }
>> +    }
>> +  }
>> +
>> +  Status = EFI_INVALID_PARAMETER;
>> +  LoadedImage     = NULL;
>> +  ModuleGuidIsGet = FALSE;
>> +
>> +  //
>> +  // Initialize GUID as zero value.
>> +  //
>> +  TempGuid    = &gZeroGuid;
>> +  //
>> +  // Initialize it as "" string.
>> +  //
>> +  NameString[0] = 0;
>> +
>> +  if (Handle != NULL) {
>> +    //
>> +    // Try Handle as ImageHandle.
>> +    //
>> +    Status = gBS->HandleProtocol (
>> +                  Handle,
>> +                  &gEfiLoadedImageProtocolGuid,
>> +                  (VOID**) &LoadedImage
>> +                  );
>> +
>> +    if (EFI_ERROR (Status)) {
>> +      //
>> +      // Try Handle as Controller Handle
>> +      //
>> +      Status = gBS->OpenProtocol (
>> +                    Handle,
>> +                    &gEfiDriverBindingProtocolGuid,
>> +                    (VOID **) &DriverBinding,
>> +                    NULL,
>> +                    NULL,
>> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
>> +                    );
>> +      if (!EFI_ERROR (Status)) {
>> +        //
>> +        // Get Image protocol from ImageHandle
>> +        //
>> +        Status = gBS->HandleProtocol (
>> +                      DriverBinding->ImageHandle,
>> +                      &gEfiLoadedImageProtocolGuid,
>> +                      (VOID**) &LoadedImage
>> +                      );
>> +      }
>> +    }
>> +  }
>> +
>> +  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
>> +    //
>> +    // Get Module Guid from DevicePath.
>> +    //
>> +    if (LoadedImage->FilePath != NULL &&
>> +        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
>> +        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
>> +       ) {
>> +      //
>> +      // Determine GUID associated with module logging performance
>> +      //
>> +      ModuleGuidIsGet = TRUE;
>> +      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
>> +      TempGuid        = &FvFilePath->FvFileName;
>> +    }
>> +
>> +    //
>> +    // Method 1 Get Module Name from PDB string.
>> +    //
>> +    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
>> +    if (PdbFileName != NULL && BufferSize > 0) {
>> +      StartIndex = 0;
>> +      for (Index = 0; PdbFileName[Index] != 0; Index++) {
>> +        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
>> +          StartIndex = Index + 1;
>> +        }
>> +      }
>> +      //
>> +      // Copy the PDB file name to our temporary string.
>> +      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
>> +      //
>> +      for (Index = 0; Index < BufferSize - 1; Index++) {
>> +        NameString[Index] = PdbFileName[Index + StartIndex];
>> +        if (NameString[Index] == 0 || NameString[Index] == '.') {
>> +          NameString[Index] = 0;
>> +          break;
>> +        }
>> +      }
>>
>> -  This internal function searches for the gauge entry in the gauge array.
>> -  If there is an entry that exactly matches the given keywords
>> -  and its end time stamp is zero, then the index of that gauge entry is returned;
>> -  otherwise, the the number of gauge entries in the array is returned.
>> +      if (Index == BufferSize - 1) {
>> +        NameString[Index] = 0;
>> +      }
>> +      //
>> +      // Module Name is got.
>> +      //
>> +      goto Done;
>> +    }
>> +  }
>>
>> +  //
>> +  // Method 2: Get the name string from ComponentName2 protocol
>> +  //
>> +  Status = gBS->HandleProtocol (
>> +                  Handle,
>> +                  &gEfiComponentName2ProtocolGuid,
>> +                  (VOID **) &ComponentName2
>> +                  );
>> +  if (!EFI_ERROR (Status)) {
>> +    //
>> +    // Get the current platform language setting
>> +    //
>> +    if (mPlatformLanguage == NULL) {
>> +      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
>> +    }
>> +    if (mPlatformLanguage != NULL) {
>> +      Status = ComponentName2->GetDriverName (
>> +                                 ComponentName2,
>> +                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
>> +                                 &StringPtr
>> +                                 );
>> +      if (!EFI_ERROR (Status)) {
>> +        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>> +          NameString[Index] = (CHAR8) StringPtr[Index];
>> +        }
>> +        NameString[Index] = 0;
>> +        //
>> +        // Module Name is got.
>> +        //
>> +        goto Done;
>> +      }
>> +    }
>> +  }
>> +
>> +  if (ModuleGuidIsGet) {
>> +    //
>> +    // Method 3 Try to get the image's FFS UI section by image GUID
>> +    //
>> +    StringPtr  = NULL;
>> +    StringSize = 0;
>> +    Status = GetSectionFromAnyFv (
>> +              TempGuid,
>> +              EFI_SECTION_USER_INTERFACE,
>> +              0,
>> +              (VOID **) &StringPtr,
>> +              &StringSize
>> +              );
>> +
>> +    if (!EFI_ERROR (Status)) {
>> +      //
>> +      // Method 3. Get the name string from FFS UI section
>> +      //
>> +      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>> +        NameString[Index] = (CHAR8) StringPtr[Index];
>> +      }
>> +      NameString[Index] = 0;
>> +      FreePool (StringPtr);
>> +    }
>> +  }
>> +
>> +Done:
>> +  //
>> +  // Copy Module Guid
>> +  //
>> +  if (ModuleGuid != NULL) {
>> +    CopyGuid (ModuleGuid, TempGuid);
>> +    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
>> +        // Handle is GUID
>> +      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
>> +    }
>> +  }
>> +
>> +  //
>> +  // Cache the Handle and Guid pairs.
>> +  //
>> +  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
>> +    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
>> +    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
>> +    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
>> +    mCachePairCount ++;
>> +  }
>> +
>> +  return Status;
>> +}
>> +
>> +/**
>> +  Get the FPDT record info.
>> +
>> +  @param  IsStart                 TRUE if the performance log is start log.
>>    @param  Handle                  Pointer to environment specific context used
>>                                    to identify the component being measured.
>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>                                    that identifies the component being measured.
>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>                                    that identifies the module being measured.
>> -  @param  Identifier              32-bit identifier.
>> +  @param  RecordInfo              On return, pointer to the info of the record.
>> +  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
>> +                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
>>
>> -  @retval The index of gauge entry in the array.
>> +  @retval EFI_SUCCESS          Get record info successfully.
>> +  @retval EFI_UNSUPPORTED      No matched FPDT record.
>>
>>  **/
>> -UINT32
>> -InternalSearchForGaugeEntry (
>> -  IN CONST VOID                 *Handle,  OPTIONAL
>> -  IN CONST CHAR8                *Token,   OPTIONAL
>> -  IN CONST CHAR8                *Module,   OPTIONAL
>> -  IN UINT32                     Identifier
>> +EFI_STATUS
>> +GetFpdtRecordInfo (
>> +  IN BOOLEAN                  IsStart,
>> +  IN CONST VOID               *Handle,
>> +  IN CONST CHAR8              *Token,
>> +  IN CONST CHAR8              *Module,
>> +  OUT BASIC_RECORD_INFO       *RecordInfo,
>> +  IN OUT BOOLEAN              *UseModuleName
>>    )
>>  {
>> -  UINT32                    Index;
>> -  UINT32                    Index2;
>> -  UINT32                    NumberOfEntries;
>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>> +  UINT16              RecordType;
>> +  UINTN               StringSize;
>>
>> -  if (Token == NULL) {
>> -    Token = "";
>> -  }
>> -  if (Module == NULL) {
>> -    Module = "";
>> +  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
>> +
>> +  //
>> +  // Token to Type and Id.
>> +  //
>> +  if (Token != NULL) {
>> +    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
>> +      *UseModuleName = TRUE;
>> +      RecordType     = GUID_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
>> +      *UseModuleName = TRUE;
>> +      RecordType = GUID_QWORD_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
>> +      *UseModuleName = TRUE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_DB_START_ID;
>> +        RecordType   = GUID_QWORD_EVENT_TYPE;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_DB_END_ID;
>> +        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
>> +      }
>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
>> +      *UseModuleName = TRUE;
>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>> +        return RETURN_UNSUPPORTED;
>> +      }
>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
>> +      *UseModuleName = TRUE;
>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>> +         return RETURN_UNSUPPORTED;
>> +      }
>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
>> +               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
>> +               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
>> +      }
>> +    } else {                                                          // Pref used in Modules.
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
>> +      }
>> +    }
>> +  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
>> +    if (IsStart) {
>> +      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
>> +    } else {
>> +      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
>> +    }
>> +  } else {
>> +    return EFI_UNSUPPORTED;
>>    }
>>
>> -  NumberOfEntries = mGaugeData->NumberOfEntries;
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> +  //
>> +  // Get Record size baesed on the record type.
>> +  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
>> +  //
>> +  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>> +    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
>> +    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
>> +  } else {
>> +    switch (RecordType) {
>> +    case GUID_EVENT_TYPE:
>> +      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
>> +      break;
>>
>> -  Index2 = 0;
>> +    case DYNAMIC_STRING_EVENT_TYPE:
>> +      if (*UseModuleName) {
>> +        StringSize  = STRING_SIZE;
>> +      } else if (Token  != NULL) {
>> +        StringSize  = AsciiStrSize (Token);
>> +      } else if (Module != NULL) {
>> +        StringSize  = AsciiStrSize (Module);
>> +      } else {
>> +        StringSize  = STRING_SIZE;
>> +      }
>> +      if (StringSize > STRING_SIZE) {
>> +        StringSize   = STRING_SIZE;
>> +      }
>> +      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
>> +      break;
>>
>> -  for (Index = 0; Index < NumberOfEntries; Index++) {
>> -    Index2 = NumberOfEntries - 1 - Index;
>> -    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
>> -        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
>> -      Index = Index2;
>> +    case GUID_QWORD_EVENT_TYPE:
>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
>>        break;
>> +
>> +    case GUID_QWORD_STRING_EVENT_TYPE:
>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
>> +      break;
>> +
>> +    default:
>> +      //
>> +      // Record is unsupported yet, return EFI_UNSUPPORTED
>> +      //
>> +      return EFI_UNSUPPORTED;
>>      }
>>    }
>>
>> -  return Index;
>> +  RecordInfo->Type = RecordType;
>> +  return EFI_SUCCESS;
>>  }
>>
>>  /**
>> -  Adds a record at the end of the performance measurement log
>> -  that records the start time of a performance measurement.
>> -
>> -  Adds a record to the end of the performance measurement log
>> -  that contains the Handle, Token, Module and Identifier.
>> -  The end time of the new record must be set to zero.
>> -  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>> -  If TimeStamp is zero, the start time in the record is filled in with the value
>> -  read from the current time stamp.
>> +  Add performance log to FPDT boot record table.
>>
>> +  @param  IsStart                 TRUE if the performance log is start log.
>>    @param  Handle                  Pointer to environment specific context used
>>                                    to identify the component being measured.
>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>                                    that identifies the component being measured.
>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>                                    that identifies the module being measured.
>> -  @param  TimeStamp               64-bit time stamp.
>> +  @param  Ticker                  64-bit time stamp.
>>    @param  Identifier              32-bit identifier. If the value is 0, the created record
>>                                    is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>
>> -  @retval EFI_SUCCESS             The data was read correctly from the device.
>> +  @retval EFI_SUCCESS             Add FPDT boot record.
>>    @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>> +  @retval EFI_UNSUPPORTED         No matched FPDT record.
>>
>>  **/
>>  EFI_STATUS
>> -EFIAPI
>> -StartGaugeEx (
>> +InsertFpdtMeasurement (
>> +  IN BOOLEAN      IsStart,
>>    IN CONST VOID   *Handle,  OPTIONAL
>>    IN CONST CHAR8  *Token,   OPTIONAL
>>    IN CONST CHAR8  *Module,  OPTIONAL
>> -  IN UINT64       TimeStamp,
>> +  IN UINT64       Ticker,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>> -  UINTN                     GaugeDataSize;
>> -  GAUGE_DATA_HEADER         *NewGaugeData;
>> -  UINTN                     OldGaugeDataSize;
>> -  GAUGE_DATA_HEADER         *OldGaugeData;
>> -  UINT32                    Index;
>> -  EFI_STATUS                Status;
>> +  EFI_GUID                     ModuleGuid;
>> +  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>> +  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
>> +  EFI_STATUS                   Status;
>> +  FPDT_RECORD_PTR              FpdtRecordPtr;
>> +  BASIC_RECORD_INFO            RecordInfo;
>> +  UINT64                       TimeStamp;
>> +  UINTN                        DestMax;
>> +  UINTN                        StrLength;
>> +  CONST CHAR8                  *StringPtr;
>> +  BOOLEAN                      UseModuleName;
>> +
>> +  StringPtr     = NULL;
>> +  UseModuleName = FALSE;
>> +  ZeroMem (ModuleName, sizeof (ModuleName));
>> +  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
>>
>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>> +  //
>> +  // Get record info (type, size, ProgressID and Module Guid).
>> +  //
>> +  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
>>    if (EFI_ERROR (Status)) {
>>      return Status;
>>    }
>>
>> -  Index = mGaugeData->NumberOfEntries;
>> -  if (Index >= mMaxGaugeRecords) {
>> +  //
>> +  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
>> +  // !!! Note: If the Pref is not the known Token used in the core but have same
>> +  // ID with the core Token, this case will not be supported.
>> +  // And in currtnt usage mode, for the unkown ID, there is a general rule:
>> +  // If it is start pref: the lower 4 bits of the ID should be 0.
>> +  // If it is end pref: the lower 4 bits of the ID should not be 0.
>> +  // If input ID doesn't follow the rule, we will adjust it.
>> +  //
>> +  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>> +    return EFI_UNSUPPORTED;
>> +  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>> +    if (IsStart && ((Identifier & 0x000F) != 0)) {
>> +      Identifier &= 0xFFF0;
>> +    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
>> +      Identifier += 1;
>> +    }
>> +    RecordInfo.ProgressID = (UINT16)Identifier;
>> +  }
>> +
>> +  if (mFpdtBufferIsReported) {
>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
>> +  } else {
>> +    //
>> +    // Check if pre-allocated buffer is full
>>      //
>> -    // Try to enlarge the scale of gauge array.
>> +    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
>> +      mPerformancePointer = ReallocatePool (
>> +                              mPerformanceLength,
>> +                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
>> +                              mPerformancePointer
>> +                              );
>> +
>> +      if (mPerformancePointer == NULL) {
>> +        return EFI_OUT_OF_RESOURCES;
>> +      }
>> +      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
>> +    }
>>      //
>> -    OldGaugeData      = mGaugeData;
>> -    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
>> +    // Covert buffer to FPDT Ptr Union type.
>> +    //
>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
>> +  }
>> +  FpdtRecordPtr.RecordHeader->Length = 0;
>>
>> -    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
>> +  //
>> +  // Get the TimeStamp.
>> +  //
>> +  if (Ticker == 0) {
>> +    Ticker    = GetPerformanceCounter ();
>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>> +  } else if (Ticker == 1) {
>> +    TimeStamp = 0;
>> +  } else {
>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>> +  }
>>
>> -    NewGaugeData = AllocateZeroPool (GaugeDataSize);
>> -    if (NewGaugeData == NULL) {
>> -      EfiReleaseLock (&mPerfRecordLock);
>> -      return EFI_OUT_OF_RESOURCES;
>> +  //
>> +  // Get the ModuleName and ModuleGuid form the handle.
>> +  //
>> +  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
>> +
>> +  //
>> +  // Fill in the record information.
>> +  //
>> +  switch (RecordInfo.Type) {
>> +  case GUID_EVENT_TYPE:
>> +    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
>> +    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
>> +    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
>> +    break;
>> +
>> +  case DYNAMIC_STRING_EVENT_TYPE:
>> +    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
>> +    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
>> +    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
>> +
>> +    if (UseModuleName) {
>> +      StringPtr     = ModuleName;
>> +    } else if (Token != NULL) {
>> +      StringPtr     = Token;
>> +    } else if (Module != NULL) {
>> +      StringPtr     = Module;
>> +    } else if (ModuleName != NULL) {
>> +      StringPtr     = ModuleName;
>> +    }
>> +    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
>> +      StrLength     = AsciiStrLen (StringPtr);
>> +      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
>> +      if (StrLength >= DestMax) {
>> +        StrLength   = DestMax -1;
>> +      }
>> +      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
>>      }
>> +    break;
>> +
>> +  case GUID_QWORD_EVENT_TYPE:
>> +    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
>> +    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
>> +    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
>> +    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
>> +      mLoadImageCount++;
>> +      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
>> +    }
>> +    break;
>> +
>> +  case GUID_QWORD_STRING_EVENT_TYPE:
>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
>> +    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
>> +    break;
>> +
>> +  default:
>> +    //
>> +    // Record is not supported in current DXE phase, return EFI_ABORTED
>> +    //
>> +    return EFI_UNSUPPORTED;
>> +  }
>> +
>> +  //
>> +  // Report record one by one after records have been reported together.
>> +  //
>> +  if (mFpdtBufferIsReported) {
>> +      //
>> +      // Append Boot records to the boot performance table.
>> +      //
>> +      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
>> +        if (!mLackSpaceIsReported) {
>> +          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
>> +          mLackSpaceIsReported = TRUE;
>> +        }
>> +        return EFI_OUT_OF_RESOURCES;
>> +      } else {
>> +        //
>> +        // Save boot record into BootPerformance table
>> +        //
>> +        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
>> +        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
>> +        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
>> +      }
>> +  } else {
>> +    //
>> +    // Update the cached FPDT record buffer.
>> +    //
>> +    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
>> +  }
>> +
>> +  return EFI_SUCCESS;
>> +}
>> +
>> +/**
>> +  Dumps all the PEI performance.
>> +
>> +  @param  HobStart      A pointer to a Guid.
>>
>> -    mGaugeData = NewGaugeData;
>> -    mMaxGaugeRecords *= 2;
>> +  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>> +  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>> +  to DXE performance data structures.
>>
>> +**/
>> +VOID
>> +InternalGetPeiPerformance (
>> +  VOID  *HobStart
>> +  )
>> +{
>> +  UINT8                                *FirmwarePerformanceHob;
>> +  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
>> +  UINT8                                *EventRec;
>> +  EFI_HOB_GUID_TYPE                    *GuidHob;
>> +
>> +  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
>> +  while (GuidHob != NULL) {
>> +    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
>> +    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
>> +
>> +    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
>> +      mPerformancePointer = ReallocatePool (
>> +                              mPerformanceLength,
>> +                              mPerformanceLength +
>> +                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
>> +                              FIRMWARE_RECORD_BUFFER,
>> +                              mPerformancePointer
>> +                              );
>> +      ASSERT (mPerformancePointer != NULL);
>> +      mMaxPerformanceLength = mPerformanceLength +
>> +                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
>> +                              FIRMWARE_RECORD_BUFFER;
>> +    }
>> +
>> +    EventRec = mPerformancePointer + mPerformanceLength;
>> +    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
>>      //
>> -    // Initialize new data array and migrate old data one.
>> +    // Update the used buffer size.
>>      //
>> -    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
>> +    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
>> +    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
>>
>> -    FreePool (OldGaugeData);
>> +    //
>> +    // Get next performance guid hob
>> +    //
>> +    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
>>    }
>> +}
>>
>> -  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
>> +/**
>> +  Report Boot Perforamnce table address as report status code.
>>
>> -  if (Token != NULL) {
>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
>> -  }
>> -  if (Module != NULL) {
>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
>> +  @param  Event    The event of notify protocol.
>> +  @param  Context  Notify event context.
>> +
>> +**/
>> +VOID
>> +EFIAPI
>> +ReportFpdtRecordBuffer (
>> +  IN EFI_EVENT     Event,
>> +  IN VOID          *Context
>> +  )
>> +{
>> +  EFI_STATUS      Status;
>> +  UINT64          BPDTAddr;
>> +
>> +  if (!mFpdtBufferIsReported) {
>> +    Status = AllocateBootPerformanceTable ();
>> +    if (!EFI_ERROR(Status)) {
>> +      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
>> +      REPORT_STATUS_CODE_EX (
>> +          EFI_PROGRESS_CODE,
>> +          EFI_SOFTWARE_DXE_BS_DRIVER,
>> +          0,
>> +          NULL,
>> +          &gEfiFirmwarePerformanceGuid,
>> +          &BPDTAddr,
>> +          sizeof (UINT64)
>> +          );
>> +    }
>> +    //
>> +    // Free Cached FPDT record Buffer
>> +    //
>> +    if (mPerformancePointer != NULL) {
>> +      FreePool (mPerformancePointer);
>> +      mPerformancePointer   = NULL;
>> +    }
>> +    mPerformanceLength    = 0;
>> +    mMaxPerformanceLength = 0;
>> +    //
>> +    // Set FPDT report state to TRUE.
>> +    //
>> +    mFpdtBufferIsReported = TRUE;
>>    }
>> +}
>>
>> -  GaugeEntryExArray[Index].EndTimeStamp = 0;
>> -  GaugeEntryExArray[Index].Identifier = Identifier;
>> +/**
>> +  Adds a record at the end of the performance measurement log
>> +  that records the start time of a performance measurement.
>>
>> -  if (TimeStamp == 0) {
>> -    TimeStamp = GetPerformanceCounter ();
>> -  }
>> -  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
>> +  Adds a record to the end of the performance measurement log
>> +  that contains the Handle, Token, Module and Identifier.
>> +  The end time of the new record must be set to zero.
>> +  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>> +  If TimeStamp is zero, the start time in the record is filled in with the value
>> +  read from the current time stamp.
>>
>> -  mGaugeData->NumberOfEntries++;
>> +  @param  Handle                  Pointer to environment specific context used
>> +                                  to identify the component being measured.
>> +  @param  Token                   Pointer to a Null-terminated ASCII string
>> +                                  that identifies the component being measured.
>> +  @param  Module                  Pointer to a Null-terminated ASCII string
>> +                                  that identifies the module being measured.
>> +  @param  TimeStamp               64-bit time stamp.
>> +  @param  Identifier              32-bit identifier. If the value is 0, the created record
>> +                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>
>> -  EfiReleaseLock (&mPerfRecordLock);
>> +  @retval EFI_SUCCESS             The data was read correctly from the device.
>> +  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>
>> -  return EFI_SUCCESS;
>> +**/
>> +EFI_STATUS
>> +EFIAPI
>> +StartGaugeEx (
>> +  IN CONST VOID   *Handle,  OPTIONAL
>> +  IN CONST CHAR8  *Token,   OPTIONAL
>> +  IN CONST CHAR8  *Module,  OPTIONAL
>> +  IN UINT64       TimeStamp,
>> +  IN UINT32       Identifier
>> +  )
>> +{
>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Searches the performance measurement log from the beginning of the log
>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>
>>    Searches the performance measurement log from the beginning of the log
>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>    If the record can not be found then return EFI_NOT_FOUND.
>>    If the record is found and TimeStamp is not zero,
>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>    is filled in with the current time stamp value.
>> @@ -260,89 +1188,19 @@ EndGaugeEx (
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>> -  UINT32              Index;
>> -  EFI_STATUS          Status;
>> -
>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>> -  if (EFI_ERROR (Status)) {
>> -    return Status;
>> -  }
>> -
>> -  if (TimeStamp == 0) {
>> -    TimeStamp = GetPerformanceCounter ();
>> -  }
>> -
>> -  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
>> -  if (Index >= mGaugeData->NumberOfEntries) {
>> -    EfiReleaseLock (&mPerfRecordLock);
>> -    return EFI_NOT_FOUND;
>> -  }
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
>> -
>> -  EfiReleaseLock (&mPerfRecordLock);
>> -  return EFI_SUCCESS;
>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Retrieves a previously logged performance measurement.
>>    It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>    and then assign the Identifier with 0.
>>
>> -  Retrieves the performance log entry from the performance log specified by LogEntryKey.
>> -  If it stands for a valid entry, then EFI_SUCCESS is returned and
>> -  GaugeDataEntryEx stores the pointer to that entry.
>> -
>> -  This internal function is added to avoid releasing lock before each return statement.
>> -
>> -  @param  LogEntryKey             The key for the previous performance measurement log entry.
>> -                                  If 0, then the first performance measurement log entry is retrieved.
>> -  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
>> -                                  if the retrieval is successful.
>> -
>> -  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
>> -  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
>> -  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
>> -  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
>> -
>> -**/
>> -EFI_STATUS
>> -EFIAPI
>> -InternalGetGaugeEx (
>> -  IN  UINTN                 LogEntryKey,
>> -  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>> -  )
>> -{
>> -  UINTN               NumberOfEntries;
>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>> -
>> -  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
>> -  if (LogEntryKey > NumberOfEntries) {
>> -    return EFI_INVALID_PARAMETER;
>> -  }
>> -  if (LogEntryKey == NumberOfEntries) {
>> -    return EFI_NOT_FOUND;
>> -  }
>> -
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -
>> -  if (GaugeDataEntryEx == NULL) {
>> -    return EFI_INVALID_PARAMETER;
>> -  }
>> -  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
>> -
>> -  return EFI_SUCCESS;
>> -}
>> -
>> -/**
>> -  Retrieves a previously logged performance measurement.
>> -  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>> -  and then assign the Identifier with 0.
>> +    !!! Not support!!!
>>
>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>    GaugeDataEntryEx stores the pointer to that entry.
>>
>> @@ -362,22 +1220,11 @@ EFIAPI
>>  GetGaugeEx (
>>    IN  UINTN                 LogEntryKey,
>>    OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>    )
>>  {
>> -  EFI_STATUS                Status;
>> -
>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>> -  if (EFI_ERROR (Status)) {
>> -    return Status;
>> -  }
>> -
>> -  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
>> -
>> -  EfiReleaseLock (&mPerfRecordLock);
>> -
>> -  return Status;
>> +  return EFI_UNSUPPORTED;
>>  }
>>
>>  /**
>>    Adds a record at the end of the performance measurement log
>>    that records the start time of a performance measurement.
>> @@ -452,10 +1299,12 @@ EndGauge (
>>  /**
>>    Retrieves a previously logged performance measurement.
>>    It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
>>    and then eliminate the Identifier.
>>
>> +    !!! Not support!!!
>> +
>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>    GaugeDataEntry stores the pointer to that entry.
>>
>>    @param  LogEntryKey             The key for the previous performance measurement log entry.
>> @@ -474,81 +1323,13 @@ EFIAPI
>>  GetGauge (
>>    IN  UINTN               LogEntryKey,
>>    OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
>>    )
>>  {
>> -  EFI_STATUS          Status;
>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
>> -
>> -  GaugeEntryEx = NULL;
>> -
>> -  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
>> -  if (EFI_ERROR (Status)) {
>> -    return Status;
>> -  }
>> -
>> -  if (GaugeDataEntry == NULL) {
>> -    return EFI_INVALID_PARAMETER;
>> -  }
>> -
>> -  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
>> -
>> -  return EFI_SUCCESS;
>> +  return EFI_UNSUPPORTED;
>>  }
>>
>> -/**
>> -  Dumps all the PEI performance log to DXE performance gauge array.
>> -
>> -  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>> -  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>> -  to DXE performance data structures.
>> -
>> -**/
>> -VOID
>> -InternalGetPeiPerformance (
>> -  VOID
>> -  )
>> -{
>> -  EFI_HOB_GUID_TYPE                 *GuidHob;
>> -  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
>> -  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
>> -  UINT32                            *LogIdArray;
>> -  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
>> -  UINT32                            Index;
>> -  UINT32                            NumberOfEntries;
>> -
>> -  NumberOfEntries = 0;
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -
>> -  //
>> -  // Dump PEI Log Entries to DXE Guage Data structure.
>> -  //
>> -  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
>> -  if (GuidHob != NULL) {
>> -    LogHob          = GET_GUID_HOB_DATA (GuidHob);
>> -    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
>> -
>> -    NumberOfEntries = LogHob->NumberOfEntries;
>> -    for (Index = 0; Index < NumberOfEntries; Index++) {
>> -      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
>> -      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
>> -      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
>> -      GaugeEntryExArray[Index].Identifier     = 0;
>> -    }
>> -
>> -    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
>> -    if (GuidHob != NULL) {
>> -      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
>> -      for (Index = 0; Index < NumberOfEntries; Index++) {
>> -        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
>> -      }
>> -    }
>> -  }
>> -  mGaugeData->NumberOfEntries = NumberOfEntries;
>> -}
>>
>>  /**
>>    The constructor function initializes Performance infrastructure for DXE phase.
>>
>>    The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
>> @@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
>>    IN EFI_HANDLE        ImageHandle,
>>    IN EFI_SYSTEM_TABLE  *SystemTable
>>    )
>>  {
>>    EFI_STATUS                Status;
>> +  EFI_HANDLE                Handle;
>> +  EFI_EVENT                 ReadyToBootEvent;
>>    PERFORMANCE_PROPERTY      *PerformanceProperty;
>>
>> -
>>    if (!PerformanceMeasurementEnabled ()) {
>>      //
>>      // Do not initialize performance infrastructure if not required.
>>      //
>>      return EFI_SUCCESS;
>>    }
>> +
>> +  //
>> +  // Dump normal PEI performance records
>> +  //
>> +  InternalGetPeiPerformance (GetHobList());
>> +
>>    //
>> -  // Install the protocol interfaces.
>> +  // Install the protocol interfaces for DXE performance library instance.
>>    //
>> +  Handle = NULL;
>>    Status = gBS->InstallMultipleProtocolInterfaces (
>> -                  &mHandle,
>> +                  &Handle,
>>                    &gPerformanceProtocolGuid,
>>                    &mPerformanceInterface,
>>                    &gPerformanceExProtocolGuid,
>>                    &mPerformanceExInterface,
>>                    NULL
>>                    );
>>    ASSERT_EFI_ERROR (Status);
>>
>> -  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
>> -                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
>> -                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
>> -
>> -  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
>> -  ASSERT (mGaugeData != NULL);
>> +  //
>> +  // Register ReadyToBoot event to report StatusCode data
>> +  //
>> +  Status = gBS->CreateEventEx (
>> +                  EVT_NOTIFY_SIGNAL,
>> +                  TPL_CALLBACK,
>> +                  ReportFpdtRecordBuffer,
>> +                  NULL,
>> +                  &gEfiEventReadyToBootGuid,
>> +                  &ReadyToBootEvent
>> +                  );
>>
>> -  InternalGetPeiPerformance ();
>> +  ASSERT_EFI_ERROR (Status);
>>
>>    Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
>>    if (EFI_ERROR (Status)) {
>>      //
>>      // Install configuration table for performance property.
>> @@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Searches the performance measurement log from the beginning of the log
>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>
>>    Searches the performance measurement log from the beginning of the log
>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>    If the record can not be found then return RETURN_NOT_FOUND.
>>    If the record is found and TimeStamp is not zero,
>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>    is filled in with the current time stamp value.
>> @@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>    It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
>>    and then assign the Identifier with 0.
>>
>> +    !!! Not support!!!
>> +
>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>> @@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
>>                                    being measured.
>>    @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
>>                                    was started.
>>    @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
>>                                    was ended.
>> -  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
>> +  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
>> +                                  was ended.
>>
>>    @return The key for the next performance log entry (in general case).
>>
>>  **/
>>  UINTN
>>  EFIAPI
>>  GetPerformanceMeasurementEx (
>> -  IN  UINTN       LogEntryKey,
>> +  IN  UINTN       LogEntryKey,
>>    OUT CONST VOID  **Handle,
>>    OUT CONST CHAR8 **Token,
>>    OUT CONST CHAR8 **Module,
>>    OUT UINT64      *StartTimeStamp,
>>    OUT UINT64      *EndTimeStamp,
>>    OUT UINT32      *Identifier
>>    )
>>  {
>> -  EFI_STATUS           Status;
>> -  GAUGE_DATA_ENTRY_EX  *GaugeData;
>> -
>> -  GaugeData = NULL;
>> -
>> -  ASSERT (Handle != NULL);
>> -  ASSERT (Token != NULL);
>> -  ASSERT (Module != NULL);
>> -  ASSERT (StartTimeStamp != NULL);
>> -  ASSERT (EndTimeStamp != NULL);
>> -  ASSERT (Identifier != NULL);
>> -
>> -  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
>> -
>> -  //
>> -  // Make sure that LogEntryKey is a valid log entry key,
>> -  //
>> -  ASSERT (Status != EFI_INVALID_PARAMETER);
>> -
>> -  if (EFI_ERROR (Status)) {
>> -    //
>> -    // The LogEntryKey is the last entry (equals to the total entry number).
>> -    //
>> -    return 0;
>> -  }
>> -
>> -  ASSERT (GaugeData != NULL);
>> -
>> -  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
>> -  *Token          = GaugeData->Token;
>> -  *Module         = GaugeData->Module;
>> -  *StartTimeStamp = GaugeData->StartTimeStamp;
>> -  *EndTimeStamp   = GaugeData->EndTimeStamp;
>> -  *Identifier     = GaugeData->Identifier;
>> -
>> -  return LogEntryKey;
>> +  return 0;
>>  }
>>
>>  /**
>>    Adds a record at the end of the performance measurement log
>>    that records the start time of a performance measurement.
>> @@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
>>    IN CONST CHAR8  *Token,   OPTIONAL
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp
>>    )
>>  {
>> -  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
>>  }
>>
>>  /**
>>    Searches the performance measurement log from the beginning of the log
>>    for the first matching record that contains a zero end time and fills in a valid end time.
>> @@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
>>    IN CONST CHAR8  *Token,   OPTIONAL
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp
>>    )
>>  {
>> -  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
>>  }
>>
>>  /**
>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>    It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
>>    and then eliminate the Identifier.
>>
>> +  !!! Not support!!!
>> +
>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>> @@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
>>    OUT CONST CHAR8 **Module,
>>    OUT UINT64      *StartTimeStamp,
>>    OUT UINT64      *EndTimeStamp
>>    )
>>  {
>> -  UINT32 Identifier;
>> -  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
>> +  return 0;
>>  }
>>
>>  /**
>>    Returns TRUE if the performance measurement macros are enabled.
>>
>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>> index 5b89ce2..71c181f 100644
>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>> @@ -7,11 +7,11 @@
>>  #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
>>  #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
>>  #  This library is mainly used by DxeCore to start performance logging to ensure that
>>  #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
>>  #
>> -#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>> +#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>  # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>  #  This program and the accompanying materials
>>  #  are licensed and made available under the terms and conditions of the BSD License
>>  #  which accompanies this distribution.  The full text of the license may be found at
>>  #  http://opensource.org/licenses/bsd-license.php
>> @@ -48,27 +48,39 @@
>>
>>
>>  [LibraryClasses]
>>    MemoryAllocationLib
>>    UefiBootServicesTableLib
>> +  UefiRuntimeServicesTableLib
>>    PcdLib
>>    TimerLib
>>    BaseMemoryLib
>>    BaseLib
>>    HobLib
>>    DebugLib
>>    UefiLib
>> +  ReportStatusCodeLib
>> +  DxeServicesLib
>> +  PeCoffGetEntryPointLib
>> +
>> +[Protocols]
>> +  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
>>
>>
>>  [Guids]
>>    ## SOMETIMES_CONSUMES   ## HOB
>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>    ## PRODUCES             ## SystemTable
>>    gPerformanceProtocolGuid
>>    ## SOMETIMES_CONSUMES   ## HOB
>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>    gPerformanceExProtocolGuid
>> +  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
>> +  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
>> +  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
>> +  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
>> +  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
>>
>>  [Pcd]
>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
>> -  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
>> +  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>> index f1540d8..7e79675 100644
>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>> @@ -2,11 +2,11 @@
>>    Master header files for DxeCorePerformanceLib instance.
>>
>>    This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
>>    library instance at its constructor.
>>
>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>  This program and the accompanying materials
>>  are licensed and made available under the terms and conditions of the BSD License
>>  which accompanies this distribution.  The full text of the license may be found at
>>  http://opensource.org/licenses/bsd-license.php
>>
>> @@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>
>>
>>  #include <PiDxe.h>
>>
>>  #include <Guid/Performance.h>
>> +#include <Guid/ExtendedFirmwarePerformance.h>
>> +#include <Guid/ZeroGuid.h>
>> +#include <Guid/EventGroup.h>
>> +#include <Guid/FirmwarePerformance.h>
>> +#include <Guid/PiSmmCommunicationRegionTable.h>
>> +
>> +#include <Protocol/DriverBinding.h>
>> +#include <Protocol/LoadedImage.h>
>> +#include <Protocol/ComponentName2.h>
>> +#include <Protocol/DevicePathToText.h>
>> +#include <Protocol/SmmCommunication.h>
>>
>>  #include <Library/PerformanceLib.h>
>>  #include <Library/DebugLib.h>
>>  #include <Library/HobLib.h>
>>  #include <Library/BaseLib.h>
>>  #include <Library/BaseMemoryLib.h>
>>  #include <Library/TimerLib.h>
>>  #include <Library/PcdLib.h>
>>  #include <Library/UefiBootServicesTableLib.h>
>> +#include <Library/UefiRuntimeServicesTableLib.h>
>>  #include <Library/MemoryAllocationLib.h>
>>  #include <Library/UefiLib.h>
>> +#include <Library/ReportStatusCodeLib.h>
>> +#include <Library/DxeServicesLib.h>
>> +#include <Library/PeCoffGetEntryPointLib.h>
>>
>>  //
>>  // Interface declarations for PerformanceEx Protocol.
>>  //
>>  /**
>> --
>> 1.9.5.msysgit.1
>>
>> _______________________________________________
>> edk2-devel mailing list
>> edk2-devel@lists.01.org
>> https://lists.01.org/mailman/listinfo/edk2-devel
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Zeng, Star 6 years, 7 months ago
How about the code to try allocating <4G memory, then try allocating any memory if failed to allocate <4G memory?

For example, the code snippet in SmbiosDxe.c.

    PhysicalAddress = 0xffffffff;
    Status = gBS->AllocatePages (
                    AllocateMaxAddress,
                    EfiRuntimeServicesData,
                    EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
                    &PhysicalAddress
                    );
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_ERROR, "SmbiosCreateTable () could not allocate EntryPointStructure < 4GB\n"));
      Status = gBS->AllocatePages (
                      AllocateAnyPages,
                      EfiRuntimeServicesData,
                      EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
                      &PhysicalAddress
                      );
     if (EFI_ERROR (Status)) {
        return EFI_OUT_OF_RESOURCES;
      }
    }


Thanks,
Star
-----Original Message-----
From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org] 
Sent: Tuesday, May 22, 2018 4:52 PM
To: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase

(+ Laszlo, Andrew, Mike)

On 22 May 2018 at 02:33, Bi, Dandan <dandan.bi@intel.com> wrote:
> Sorry for the delayed response.
>
> The allocated  performance table ( below 4G ) is to save the boot performance data in normal boot and S3 phase.
> PEIM FirmwarePerformancePei will get the address of the performance table and update the performance date of S3 phase to the table.
> The address need to be handled in PEI phase(32bit), that's the main reason why we allocate it below 4G.
>

The 32-bit PEI + 64-bit DXE combo is specific to X64. You have added
code to a generic library that ASSERT()s if allocating memory below 4
GB fails, breaking non-PC architectures.

So please, fix this. Or at least suggest a way around it so that other
architectures can keep using this library.

This is another consequence of our failure to model the special 32-bit
PEI/64-bit DXE combination using proper PI interfaces, resulting in
these kinds of breakages and open coded 4 GB allocations all
throughout the code. Can we please work on getting this fixed?


> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
> Sent: Wednesday, May 2, 2018 12:27 AM
> To: Bi, Dandan <dandan.bi@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>
> Cc: edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>
> On 30 January 2018 at 14:53, Dandan Bi <dandan.bi@intel.com> wrote:
>> V2:
>> Update DxecorePerformanceLib to report the boot performance table
>> address instead of records contents.
>>
>> Updated to convert Pref entry to FPDT record in DXE phase and then
>> allocate boot performance table to save the record and report
>> the address of boot performance table to FirmwarePerformanceDxe.
>>
>> Cc: Liming Gao <liming.gao@intel.com>
>> Cc: Star Zeng <star.zeng@intel.com>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Dandan Bi <dandan.bi@intel.com>
>> ---
>>  .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
>>  .../DxeCorePerformanceLib.inf                      |   20 +-
>>  .../DxeCorePerformanceLibInternal.h                |   17 +-
>>  3 files changed, 1108 insertions(+), 318 deletions(-)
>>
>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>> index 7c0e207..c6f8a16 100644
>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>> @@ -8,11 +8,11 @@
>>    which are consumed by DxePerformanceLib to logging performance data in DXE phase.
>>
>>    This library is mainly used by DxeCore to start performance logging to ensure that
>>    Performance Protocol is installed at the very beginning of DXE phase.
>>
>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>  This program and the accompanying materials
>>  are licensed and made available under the terms and conditions of the BSD License
>>  which accompanies this distribution.  The full text of the license may be found at
>>  http://opensource.org/licenses/bsd-license.php
>> @@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>  **/
>>
>>
>>  #include "DxeCorePerformanceLibInternal.h"
>>
>> -
>>  //
>> -// The data structure to hold global performance data.
>> +// Data for FPDT performance records.
>>  //
>> -GAUGE_DATA_HEADER    *mGaugeData;
>> +#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
>> +#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
>> +#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
>> +#define FIRMWARE_RECORD_BUFFER  0x10000
>> +#define CACHE_HANDLE_GUID_COUNT 0x1000
>> +
>> +BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
>> +BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
>> +  {
>> +    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
>> +    sizeof (BOOT_PERFORMANCE_TABLE)
>> +  },
>> +  {
>> +    {
>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
>> +      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
>> +    },
>> +    0,  // Reserved
>> +    //
>> +    // These values will be updated at runtime.
>> +    //
>> +    0,  // ResetEnd
>> +    0,  // OsLoaderLoadImageStart
>> +    0,  // OsLoaderStartImageStart
>> +    0,  // ExitBootServicesEntry
>> +    0   // ExitBootServicesExit
>> +  }
>> +};
>>
>> -//
>> -// The current maximum number of logging entries. If current number of
>> -// entries exceeds this value, it will re-allocate a larger array and
>> -// migration the old data to the larger array.
>> -//
>> -UINT32               mMaxGaugeRecords;
>> +typedef struct {
>> +  EFI_HANDLE    Handle;
>> +  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>> +  EFI_GUID      ModuleGuid;
>> +} HANDLE_GUID_MAP;
>>
>> -//
>> -// The handle to install Performance Protocol instance.
>> -//
>> -EFI_HANDLE           mHandle = NULL;
>> +HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
>> +UINTN           mCachePairCount = 0;
>> +
>> +UINT32  mLoadImageCount       = 0;
>> +UINT32  mPerformanceLength    = 0;
>> +UINT32  mMaxPerformanceLength = 0;
>> +UINT32  mBootRecordSize       = 0;
>> +UINT32  mBootRecordMaxSize    = 0;
>> +
>> +BOOLEAN mFpdtBufferIsReported = FALSE;
>> +BOOLEAN mLackSpaceIsReported  = FALSE;
>> +CHAR8   *mPlatformLanguage    = NULL;
>> +UINT8   *mPerformancePointer  = NULL;
>> +UINT8   *mBootRecordBuffer    = NULL;
>> +
>> +EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
>>
>>  //
>>  // Interfaces for Performance Protocol.
>>  //
>>  PERFORMANCE_PROTOCOL mPerformanceInterface = {
>> @@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
>>    GetGaugeEx
>>    };
>>
>>  PERFORMANCE_PROPERTY  mPerformanceProperty;
>>
>> -//
>> -//  Gauge record lock to avoid data corruption or even memory overflow
>> -//
>> -STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
>> +/**
>> +Check whether the Token is a known one which is uesed by core.
>> +
>> +@param  Token      Pointer to a Null-terminated ASCII string
>> +
>> +@retval TRUE       Is a known one used by core.
>> +@retval FALSE      Not a known one.
>> +
>> +**/
>> +BOOLEAN
>> +IsKnownTokens (
>> +  IN CONST CHAR8  *Token
>> +  )
>> +{
>> +  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
>> +      AsciiStrCmp (Token, PEI_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DXE_TOK) == 0 ||
>> +      AsciiStrCmp (Token, BDS_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
>> +      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
>> +      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
>> +      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
>> +      AsciiStrCmp (Token, PEIM_TOK) == 0) {
>> +    return TRUE;
>> +  } else {
>> +    return FALSE;
>> +  }
>> +}
>> +
>> +/**
>> +Check whether the ID is a known one which map to the known Token.
>> +
>> +@param  Identifier  32-bit identifier.
>> +
>> +@retval TRUE        Is a known one used by core.
>> +@retval FALSE       Not a known one.
>> +
>> +**/
>> +BOOLEAN
>> +IsKnownID (
>> +  IN UINT32       Identifier
>> +  )
>> +{
>> +  if (Identifier == MODULE_START_ID ||
>> +      Identifier == MODULE_END_ID ||
>> +      Identifier == MODULE_LOADIMAGE_START_ID ||
>> +      Identifier == MODULE_LOADIMAGE_END_ID ||
>> +      Identifier == MODULE_DB_START_ID ||
>> +      Identifier == MODULE_DB_END_ID ||
>> +      Identifier == MODULE_DB_SUPPORT_START_ID ||
>> +      Identifier == MODULE_DB_SUPPORT_END_ID ||
>> +      Identifier == MODULE_DB_STOP_START_ID ||
>> +      Identifier == MODULE_DB_STOP_END_ID) {
>> +    return TRUE;
>> +  } else {
>> +    return FALSE;
>> +  }
>> +}
>>
>>  /**
>> -  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
>> +  Allocate EfiReservedMemoryType below 4G memory address.
>> +
>> +  This function allocates EfiReservedMemoryType below 4G memory address.
>> +
>> +  @param[in]  Size   Size of memory to allocate.
>> +
>> +  @return Allocated address for output.
>> +
>> +**/
>> +VOID *
>> +FpdtAllocateReservedMemoryBelow4G (
>> +  IN UINTN       Size
>> +  )
>> +{
>> +  UINTN                 Pages;
>> +  EFI_PHYSICAL_ADDRESS  Address;
>> +  EFI_STATUS            Status;
>> +  VOID                  *Buffer;
>> +
>> +  Buffer  = NULL;
>> +  Pages   = EFI_SIZE_TO_PAGES (Size);
>> +  Address = 0xffffffff;
>> +
>> +  Status = gBS->AllocatePages (
>> +                  AllocateMaxAddress,
>> +                  EfiReservedMemoryType,
>> +                  Pages,
>> +                  &Address
>> +                  );
>> +  ASSERT_EFI_ERROR (Status);
>
> This code is breaking DEBUG builds on ARM systems that have no memory
> below 4 GB.
>
>> +
>> +  if (!EFI_ERROR (Status)) {
>> +    Buffer = (VOID *) (UINTN) Address;
>> +    ZeroMem (Buffer, Size);
>> +  }
>> +
>> +  return Buffer;
>> +}
>> +
>> +/**
>> +  Allocate buffer for Boot Performance table.
>> +
>> +  @return Status code.
>> +
>> +**/
>> +EFI_STATUS
>> +AllocateBootPerformanceTable (
>> +  )
>> +{
>> +  EFI_STATUS                    Status;
>> +  UINTN                         Size;
>> +  UINT8                         *SmmBootRecordCommBuffer;
>> +  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
>> +  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
>> +  UINTN                         CommSize;
>> +  UINTN                         BootPerformanceDataSize;
>> +  UINT8                         *BootPerformanceData;
>> +  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
>> +  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
>> +  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
>> +  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
>> +  UINTN                         Index;
>> +  VOID                          *SmmBootRecordData;
>> +  UINTN                         SmmBootRecordDataSize;
>> +  UINTN                         ReservedMemSize;
>> +
>> +  //
>> +  // Collect boot records from SMM drivers.
>> +  //
>> +  SmmBootRecordCommBuffer = NULL;
>> +  SmmCommData             = NULL;
>> +  SmmBootRecordData       = NULL;
>> +  SmmBootRecordDataSize   = 0;
>> +  ReservedMemSize         = 0;
>> +  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
>> +  if (!EFI_ERROR (Status)) {
>> +    //
>> +    // Initialize communicate buffer
>> +    // Get the prepared Reserved Memory Range
>> +    //
>> +    Status = EfiGetSystemConfigurationTable (
>> +              &gEdkiiPiSmmCommunicationRegionTableGuid,
>> +              (VOID **) &SmmCommRegionTable
>> +              );
>> +    if (!EFI_ERROR (Status)) {
>> +      ASSERT (SmmCommRegionTable != NULL);
>> +      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
>> +      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
>> +        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
>> +          break;
>> +        }
>> +        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
>> +      }
>> +      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
>> +      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
>> +      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
>> +      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
>> +
>> +      //
>> +      // Check enough reserved memory space
>> +      //
>> +      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
>> +        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
>> +        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
>> +        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
>> +        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
>> +
>> +        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
>> +        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
>> +        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
>> +
>> +        //
>> +        // Get the size of boot records.
>> +        //
>> +        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
>> +        SmmCommData->BootRecordData = NULL;
>> +        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>> +        ASSERT_EFI_ERROR (Status);
>> +
>> +        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
>> +          //
>> +          // Get all boot records
>> +          //
>> +          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
>> +          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
>> +          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
>> +          ASSERT (SmmBootRecordData  != NULL);
>> +          SmmCommData->BootRecordOffset = 0;
>> +          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
>> +          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
>> +          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
>> +            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>> +            ASSERT_EFI_ERROR (Status);
>> +            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
>> +            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
>> +            } else {
>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
>> +            }
>> +            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
>> +          }
>> +        }
>> +      }
>> +    }
>> +  }
>> +
>> +  //
>> +  // Prepare memory for Boot Performance table.
>> +  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
>> +  //
>> +  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>> +  if (SmmCommData != NULL) {
>> +    BootPerformanceDataSize += SmmBootRecordDataSize;
>> +  }
>> +
>> +  //
>> +  // Try to allocate the same runtime buffer as last time boot.
>> +  //
>> +  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
>> +  Size = sizeof (PerformanceVariable);
>> +  Status = gRT->GetVariable (
>> +                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>> +                  &gEfiFirmwarePerformanceGuid,
>> +                  NULL,
>> +                  &Size,
>> +                  &PerformanceVariable
>> +                  );
>> +  if (!EFI_ERROR (Status)) {
>> +    Status = gBS->AllocatePages (
>> +                    AllocateAddress,
>> +                    EfiReservedMemoryType,
>> +                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
>> +                    &PerformanceVariable.BootPerformanceTablePointer
>> +                    );
>> +    if (!EFI_ERROR (Status)) {
>> +      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
>> +    }
>> +  }
>> +
>> +  if (mAcpiBootPerformanceTable == NULL) {
>> +    //
>> +    // Fail to allocate at specified address, continue to allocate at any address.
>> +    //
>> +    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);
>
> Why does this allocation need to live below 4 GB?
>
> If there is no good reason, can we please get rid of this?
> If there is a good reason, can we please document it in the code?
>
>> +  }
>> +  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
>> +
>> +  if (mAcpiBootPerformanceTable == NULL) {
>> +    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>> +      FreePool (SmmBootRecordData);
>> +    }
>> +    return EFI_OUT_OF_RESOURCES;
>> +  }
>> +
>> +  //
>> +  // Prepare Boot Performance Table.
>> +  //
>> +  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
>> +  //
>> +  // Fill Basic Boot record to Boot Performance Table.
>> +  //
>> +  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
>> +  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
>> +  //
>> +  // Fill Boot records from boot drivers.
>> +  //
>> +  if (mPerformancePointer != NULL) {
>> +    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
>> +    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
>> +    BootPerformanceData = BootPerformanceData + mPerformanceLength;
>> +  }
>> +  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>> +    //
>> +    // Fill Boot records from SMM drivers.
>> +    //
>> +    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
>> +    FreePool (SmmBootRecordData);
>> +    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
>> +    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
>> +  }
>> +
>> +  //
>> +  // Save Boot Performance Table address to Variable for use in S4 resume.
>> +  //
>> +  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
>> +
>> +  //
>> +  // Save Runtime Performance Table pointers to Variable.
>> +  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
>> +  //
>> +  gRT->SetVariable (
>> +        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>> +        &gEfiFirmwarePerformanceGuid,
>> +        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
>> +        sizeof (PerformanceVariable),
>> +        &PerformanceVariable
>> +        );
>> +
>> +  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
>> +  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
>> +  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>> +
>> +  return EFI_SUCCESS;
>> +}
>> +
>> +/**
>> +  Get a human readable module name and module guid for the given image handle.
>> +  If module name can't be found, "" string will return.
>> +  If module guid can't be found, Zero Guid will return.
>> +
>> +  @param    Handle        Image handle or Controller handle.
>> +  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
>> +  @param    BufferSize    Size of the input NameString buffer.
>> +  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
>> +
>> +  @retval EFI_SUCCESS     Successfully get module name and guid.
>> +  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
>> +  @retval other value  Module Name can't be got.
>> +**/
>> +EFI_STATUS
>> +GetModuleInfoFromHandle (
>> +  IN EFI_HANDLE  Handle,
>> +  OUT CHAR8            *NameString,
>> +  IN UINTN             BufferSize,
>> +  OUT EFI_GUID         *ModuleGuid OPTIONAL
>> +  )
>> +{
>> +  EFI_STATUS                  Status;
>> +  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
>> +  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
>> +  CHAR8                       *PdbFileName;
>> +  EFI_GUID                    *TempGuid;
>> +  UINTN                       StartIndex;
>> +  UINTN                       Index;
>> +  INTN                        Count;
>> +  BOOLEAN                     ModuleGuidIsGet;
>> +  UINTN                       StringSize;
>> +  CHAR16                      *StringPtr;
>> +  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
>> +  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
>> +
>> +  if (NameString == NULL || BufferSize == 0) {
>> +    return EFI_INVALID_PARAMETER;
>> +  }
>> +  //
>> +  // Try to get the ModuleGuid and name string form the caached array.
>> +  //
>> +  if (mCachePairCount > 0) {
>> +    for (Count = mCachePairCount -1; Count >= 0; Count--) {
>> +      if (Handle == mCacheHandleGuidTable[Count].Handle) {
>> +        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
>> +        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
>> +        return EFI_SUCCESS;
>> +      }
>> +    }
>> +  }
>> +
>> +  Status = EFI_INVALID_PARAMETER;
>> +  LoadedImage     = NULL;
>> +  ModuleGuidIsGet = FALSE;
>> +
>> +  //
>> +  // Initialize GUID as zero value.
>> +  //
>> +  TempGuid    = &gZeroGuid;
>> +  //
>> +  // Initialize it as "" string.
>> +  //
>> +  NameString[0] = 0;
>> +
>> +  if (Handle != NULL) {
>> +    //
>> +    // Try Handle as ImageHandle.
>> +    //
>> +    Status = gBS->HandleProtocol (
>> +                  Handle,
>> +                  &gEfiLoadedImageProtocolGuid,
>> +                  (VOID**) &LoadedImage
>> +                  );
>> +
>> +    if (EFI_ERROR (Status)) {
>> +      //
>> +      // Try Handle as Controller Handle
>> +      //
>> +      Status = gBS->OpenProtocol (
>> +                    Handle,
>> +                    &gEfiDriverBindingProtocolGuid,
>> +                    (VOID **) &DriverBinding,
>> +                    NULL,
>> +                    NULL,
>> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
>> +                    );
>> +      if (!EFI_ERROR (Status)) {
>> +        //
>> +        // Get Image protocol from ImageHandle
>> +        //
>> +        Status = gBS->HandleProtocol (
>> +                      DriverBinding->ImageHandle,
>> +                      &gEfiLoadedImageProtocolGuid,
>> +                      (VOID**) &LoadedImage
>> +                      );
>> +      }
>> +    }
>> +  }
>> +
>> +  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
>> +    //
>> +    // Get Module Guid from DevicePath.
>> +    //
>> +    if (LoadedImage->FilePath != NULL &&
>> +        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
>> +        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
>> +       ) {
>> +      //
>> +      // Determine GUID associated with module logging performance
>> +      //
>> +      ModuleGuidIsGet = TRUE;
>> +      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
>> +      TempGuid        = &FvFilePath->FvFileName;
>> +    }
>> +
>> +    //
>> +    // Method 1 Get Module Name from PDB string.
>> +    //
>> +    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
>> +    if (PdbFileName != NULL && BufferSize > 0) {
>> +      StartIndex = 0;
>> +      for (Index = 0; PdbFileName[Index] != 0; Index++) {
>> +        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
>> +          StartIndex = Index + 1;
>> +        }
>> +      }
>> +      //
>> +      // Copy the PDB file name to our temporary string.
>> +      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
>> +      //
>> +      for (Index = 0; Index < BufferSize - 1; Index++) {
>> +        NameString[Index] = PdbFileName[Index + StartIndex];
>> +        if (NameString[Index] == 0 || NameString[Index] == '.') {
>> +          NameString[Index] = 0;
>> +          break;
>> +        }
>> +      }
>>
>> -  This internal function searches for the gauge entry in the gauge array.
>> -  If there is an entry that exactly matches the given keywords
>> -  and its end time stamp is zero, then the index of that gauge entry is returned;
>> -  otherwise, the the number of gauge entries in the array is returned.
>> +      if (Index == BufferSize - 1) {
>> +        NameString[Index] = 0;
>> +      }
>> +      //
>> +      // Module Name is got.
>> +      //
>> +      goto Done;
>> +    }
>> +  }
>>
>> +  //
>> +  // Method 2: Get the name string from ComponentName2 protocol
>> +  //
>> +  Status = gBS->HandleProtocol (
>> +                  Handle,
>> +                  &gEfiComponentName2ProtocolGuid,
>> +                  (VOID **) &ComponentName2
>> +                  );
>> +  if (!EFI_ERROR (Status)) {
>> +    //
>> +    // Get the current platform language setting
>> +    //
>> +    if (mPlatformLanguage == NULL) {
>> +      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
>> +    }
>> +    if (mPlatformLanguage != NULL) {
>> +      Status = ComponentName2->GetDriverName (
>> +                                 ComponentName2,
>> +                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
>> +                                 &StringPtr
>> +                                 );
>> +      if (!EFI_ERROR (Status)) {
>> +        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>> +          NameString[Index] = (CHAR8) StringPtr[Index];
>> +        }
>> +        NameString[Index] = 0;
>> +        //
>> +        // Module Name is got.
>> +        //
>> +        goto Done;
>> +      }
>> +    }
>> +  }
>> +
>> +  if (ModuleGuidIsGet) {
>> +    //
>> +    // Method 3 Try to get the image's FFS UI section by image GUID
>> +    //
>> +    StringPtr  = NULL;
>> +    StringSize = 0;
>> +    Status = GetSectionFromAnyFv (
>> +              TempGuid,
>> +              EFI_SECTION_USER_INTERFACE,
>> +              0,
>> +              (VOID **) &StringPtr,
>> +              &StringSize
>> +              );
>> +
>> +    if (!EFI_ERROR (Status)) {
>> +      //
>> +      // Method 3. Get the name string from FFS UI section
>> +      //
>> +      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>> +        NameString[Index] = (CHAR8) StringPtr[Index];
>> +      }
>> +      NameString[Index] = 0;
>> +      FreePool (StringPtr);
>> +    }
>> +  }
>> +
>> +Done:
>> +  //
>> +  // Copy Module Guid
>> +  //
>> +  if (ModuleGuid != NULL) {
>> +    CopyGuid (ModuleGuid, TempGuid);
>> +    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
>> +        // Handle is GUID
>> +      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
>> +    }
>> +  }
>> +
>> +  //
>> +  // Cache the Handle and Guid pairs.
>> +  //
>> +  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
>> +    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
>> +    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
>> +    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
>> +    mCachePairCount ++;
>> +  }
>> +
>> +  return Status;
>> +}
>> +
>> +/**
>> +  Get the FPDT record info.
>> +
>> +  @param  IsStart                 TRUE if the performance log is start log.
>>    @param  Handle                  Pointer to environment specific context used
>>                                    to identify the component being measured.
>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>                                    that identifies the component being measured.
>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>                                    that identifies the module being measured.
>> -  @param  Identifier              32-bit identifier.
>> +  @param  RecordInfo              On return, pointer to the info of the record.
>> +  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
>> +                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
>>
>> -  @retval The index of gauge entry in the array.
>> +  @retval EFI_SUCCESS          Get record info successfully.
>> +  @retval EFI_UNSUPPORTED      No matched FPDT record.
>>
>>  **/
>> -UINT32
>> -InternalSearchForGaugeEntry (
>> -  IN CONST VOID                 *Handle,  OPTIONAL
>> -  IN CONST CHAR8                *Token,   OPTIONAL
>> -  IN CONST CHAR8                *Module,   OPTIONAL
>> -  IN UINT32                     Identifier
>> +EFI_STATUS
>> +GetFpdtRecordInfo (
>> +  IN BOOLEAN                  IsStart,
>> +  IN CONST VOID               *Handle,
>> +  IN CONST CHAR8              *Token,
>> +  IN CONST CHAR8              *Module,
>> +  OUT BASIC_RECORD_INFO       *RecordInfo,
>> +  IN OUT BOOLEAN              *UseModuleName
>>    )
>>  {
>> -  UINT32                    Index;
>> -  UINT32                    Index2;
>> -  UINT32                    NumberOfEntries;
>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>> +  UINT16              RecordType;
>> +  UINTN               StringSize;
>>
>> -  if (Token == NULL) {
>> -    Token = "";
>> -  }
>> -  if (Module == NULL) {
>> -    Module = "";
>> +  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
>> +
>> +  //
>> +  // Token to Type and Id.
>> +  //
>> +  if (Token != NULL) {
>> +    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
>> +      *UseModuleName = TRUE;
>> +      RecordType     = GUID_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
>> +      *UseModuleName = TRUE;
>> +      RecordType = GUID_QWORD_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
>> +      *UseModuleName = TRUE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_DB_START_ID;
>> +        RecordType   = GUID_QWORD_EVENT_TYPE;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_DB_END_ID;
>> +        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
>> +      }
>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
>> +      *UseModuleName = TRUE;
>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>> +        return RETURN_UNSUPPORTED;
>> +      }
>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
>> +      *UseModuleName = TRUE;
>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>> +         return RETURN_UNSUPPORTED;
>> +      }
>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
>> +      }
>> +    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
>> +               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
>> +               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
>> +      }
>> +    } else {                                                          // Pref used in Modules.
>> +      if (IsStart) {
>> +        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
>> +      } else {
>> +        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
>> +      }
>> +    }
>> +  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
>> +    if (IsStart) {
>> +      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
>> +    } else {
>> +      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
>> +    }
>> +  } else {
>> +    return EFI_UNSUPPORTED;
>>    }
>>
>> -  NumberOfEntries = mGaugeData->NumberOfEntries;
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> +  //
>> +  // Get Record size baesed on the record type.
>> +  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
>> +  //
>> +  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>> +    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
>> +    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
>> +  } else {
>> +    switch (RecordType) {
>> +    case GUID_EVENT_TYPE:
>> +      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
>> +      break;
>>
>> -  Index2 = 0;
>> +    case DYNAMIC_STRING_EVENT_TYPE:
>> +      if (*UseModuleName) {
>> +        StringSize  = STRING_SIZE;
>> +      } else if (Token  != NULL) {
>> +        StringSize  = AsciiStrSize (Token);
>> +      } else if (Module != NULL) {
>> +        StringSize  = AsciiStrSize (Module);
>> +      } else {
>> +        StringSize  = STRING_SIZE;
>> +      }
>> +      if (StringSize > STRING_SIZE) {
>> +        StringSize   = STRING_SIZE;
>> +      }
>> +      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
>> +      break;
>>
>> -  for (Index = 0; Index < NumberOfEntries; Index++) {
>> -    Index2 = NumberOfEntries - 1 - Index;
>> -    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
>> -        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
>> -      Index = Index2;
>> +    case GUID_QWORD_EVENT_TYPE:
>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
>>        break;
>> +
>> +    case GUID_QWORD_STRING_EVENT_TYPE:
>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
>> +      break;
>> +
>> +    default:
>> +      //
>> +      // Record is unsupported yet, return EFI_UNSUPPORTED
>> +      //
>> +      return EFI_UNSUPPORTED;
>>      }
>>    }
>>
>> -  return Index;
>> +  RecordInfo->Type = RecordType;
>> +  return EFI_SUCCESS;
>>  }
>>
>>  /**
>> -  Adds a record at the end of the performance measurement log
>> -  that records the start time of a performance measurement.
>> -
>> -  Adds a record to the end of the performance measurement log
>> -  that contains the Handle, Token, Module and Identifier.
>> -  The end time of the new record must be set to zero.
>> -  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>> -  If TimeStamp is zero, the start time in the record is filled in with the value
>> -  read from the current time stamp.
>> +  Add performance log to FPDT boot record table.
>>
>> +  @param  IsStart                 TRUE if the performance log is start log.
>>    @param  Handle                  Pointer to environment specific context used
>>                                    to identify the component being measured.
>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>                                    that identifies the component being measured.
>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>                                    that identifies the module being measured.
>> -  @param  TimeStamp               64-bit time stamp.
>> +  @param  Ticker                  64-bit time stamp.
>>    @param  Identifier              32-bit identifier. If the value is 0, the created record
>>                                    is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>
>> -  @retval EFI_SUCCESS             The data was read correctly from the device.
>> +  @retval EFI_SUCCESS             Add FPDT boot record.
>>    @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>> +  @retval EFI_UNSUPPORTED         No matched FPDT record.
>>
>>  **/
>>  EFI_STATUS
>> -EFIAPI
>> -StartGaugeEx (
>> +InsertFpdtMeasurement (
>> +  IN BOOLEAN      IsStart,
>>    IN CONST VOID   *Handle,  OPTIONAL
>>    IN CONST CHAR8  *Token,   OPTIONAL
>>    IN CONST CHAR8  *Module,  OPTIONAL
>> -  IN UINT64       TimeStamp,
>> +  IN UINT64       Ticker,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>> -  UINTN                     GaugeDataSize;
>> -  GAUGE_DATA_HEADER         *NewGaugeData;
>> -  UINTN                     OldGaugeDataSize;
>> -  GAUGE_DATA_HEADER         *OldGaugeData;
>> -  UINT32                    Index;
>> -  EFI_STATUS                Status;
>> +  EFI_GUID                     ModuleGuid;
>> +  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>> +  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
>> +  EFI_STATUS                   Status;
>> +  FPDT_RECORD_PTR              FpdtRecordPtr;
>> +  BASIC_RECORD_INFO            RecordInfo;
>> +  UINT64                       TimeStamp;
>> +  UINTN                        DestMax;
>> +  UINTN                        StrLength;
>> +  CONST CHAR8                  *StringPtr;
>> +  BOOLEAN                      UseModuleName;
>> +
>> +  StringPtr     = NULL;
>> +  UseModuleName = FALSE;
>> +  ZeroMem (ModuleName, sizeof (ModuleName));
>> +  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
>>
>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>> +  //
>> +  // Get record info (type, size, ProgressID and Module Guid).
>> +  //
>> +  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
>>    if (EFI_ERROR (Status)) {
>>      return Status;
>>    }
>>
>> -  Index = mGaugeData->NumberOfEntries;
>> -  if (Index >= mMaxGaugeRecords) {
>> +  //
>> +  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
>> +  // !!! Note: If the Pref is not the known Token used in the core but have same
>> +  // ID with the core Token, this case will not be supported.
>> +  // And in currtnt usage mode, for the unkown ID, there is a general rule:
>> +  // If it is start pref: the lower 4 bits of the ID should be 0.
>> +  // If it is end pref: the lower 4 bits of the ID should not be 0.
>> +  // If input ID doesn't follow the rule, we will adjust it.
>> +  //
>> +  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>> +    return EFI_UNSUPPORTED;
>> +  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>> +    if (IsStart && ((Identifier & 0x000F) != 0)) {
>> +      Identifier &= 0xFFF0;
>> +    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
>> +      Identifier += 1;
>> +    }
>> +    RecordInfo.ProgressID = (UINT16)Identifier;
>> +  }
>> +
>> +  if (mFpdtBufferIsReported) {
>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
>> +  } else {
>> +    //
>> +    // Check if pre-allocated buffer is full
>>      //
>> -    // Try to enlarge the scale of gauge array.
>> +    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
>> +      mPerformancePointer = ReallocatePool (
>> +                              mPerformanceLength,
>> +                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
>> +                              mPerformancePointer
>> +                              );
>> +
>> +      if (mPerformancePointer == NULL) {
>> +        return EFI_OUT_OF_RESOURCES;
>> +      }
>> +      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
>> +    }
>>      //
>> -    OldGaugeData      = mGaugeData;
>> -    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
>> +    // Covert buffer to FPDT Ptr Union type.
>> +    //
>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
>> +  }
>> +  FpdtRecordPtr.RecordHeader->Length = 0;
>>
>> -    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
>> +  //
>> +  // Get the TimeStamp.
>> +  //
>> +  if (Ticker == 0) {
>> +    Ticker    = GetPerformanceCounter ();
>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>> +  } else if (Ticker == 1) {
>> +    TimeStamp = 0;
>> +  } else {
>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>> +  }
>>
>> -    NewGaugeData = AllocateZeroPool (GaugeDataSize);
>> -    if (NewGaugeData == NULL) {
>> -      EfiReleaseLock (&mPerfRecordLock);
>> -      return EFI_OUT_OF_RESOURCES;
>> +  //
>> +  // Get the ModuleName and ModuleGuid form the handle.
>> +  //
>> +  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
>> +
>> +  //
>> +  // Fill in the record information.
>> +  //
>> +  switch (RecordInfo.Type) {
>> +  case GUID_EVENT_TYPE:
>> +    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
>> +    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
>> +    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
>> +    break;
>> +
>> +  case DYNAMIC_STRING_EVENT_TYPE:
>> +    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
>> +    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
>> +    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
>> +
>> +    if (UseModuleName) {
>> +      StringPtr     = ModuleName;
>> +    } else if (Token != NULL) {
>> +      StringPtr     = Token;
>> +    } else if (Module != NULL) {
>> +      StringPtr     = Module;
>> +    } else if (ModuleName != NULL) {
>> +      StringPtr     = ModuleName;
>> +    }
>> +    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
>> +      StrLength     = AsciiStrLen (StringPtr);
>> +      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
>> +      if (StrLength >= DestMax) {
>> +        StrLength   = DestMax -1;
>> +      }
>> +      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
>>      }
>> +    break;
>> +
>> +  case GUID_QWORD_EVENT_TYPE:
>> +    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
>> +    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
>> +    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
>> +    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
>> +      mLoadImageCount++;
>> +      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
>> +    }
>> +    break;
>> +
>> +  case GUID_QWORD_STRING_EVENT_TYPE:
>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
>> +    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
>> +    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
>> +    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
>> +    break;
>> +
>> +  default:
>> +    //
>> +    // Record is not supported in current DXE phase, return EFI_ABORTED
>> +    //
>> +    return EFI_UNSUPPORTED;
>> +  }
>> +
>> +  //
>> +  // Report record one by one after records have been reported together.
>> +  //
>> +  if (mFpdtBufferIsReported) {
>> +      //
>> +      // Append Boot records to the boot performance table.
>> +      //
>> +      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
>> +        if (!mLackSpaceIsReported) {
>> +          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
>> +          mLackSpaceIsReported = TRUE;
>> +        }
>> +        return EFI_OUT_OF_RESOURCES;
>> +      } else {
>> +        //
>> +        // Save boot record into BootPerformance table
>> +        //
>> +        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
>> +        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
>> +        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
>> +      }
>> +  } else {
>> +    //
>> +    // Update the cached FPDT record buffer.
>> +    //
>> +    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
>> +  }
>> +
>> +  return EFI_SUCCESS;
>> +}
>> +
>> +/**
>> +  Dumps all the PEI performance.
>> +
>> +  @param  HobStart      A pointer to a Guid.
>>
>> -    mGaugeData = NewGaugeData;
>> -    mMaxGaugeRecords *= 2;
>> +  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>> +  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>> +  to DXE performance data structures.
>>
>> +**/
>> +VOID
>> +InternalGetPeiPerformance (
>> +  VOID  *HobStart
>> +  )
>> +{
>> +  UINT8                                *FirmwarePerformanceHob;
>> +  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
>> +  UINT8                                *EventRec;
>> +  EFI_HOB_GUID_TYPE                    *GuidHob;
>> +
>> +  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
>> +  while (GuidHob != NULL) {
>> +    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
>> +    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
>> +
>> +    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
>> +      mPerformancePointer = ReallocatePool (
>> +                              mPerformanceLength,
>> +                              mPerformanceLength +
>> +                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
>> +                              FIRMWARE_RECORD_BUFFER,
>> +                              mPerformancePointer
>> +                              );
>> +      ASSERT (mPerformancePointer != NULL);
>> +      mMaxPerformanceLength = mPerformanceLength +
>> +                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
>> +                              FIRMWARE_RECORD_BUFFER;
>> +    }
>> +
>> +    EventRec = mPerformancePointer + mPerformanceLength;
>> +    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
>>      //
>> -    // Initialize new data array and migrate old data one.
>> +    // Update the used buffer size.
>>      //
>> -    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
>> +    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
>> +    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
>>
>> -    FreePool (OldGaugeData);
>> +    //
>> +    // Get next performance guid hob
>> +    //
>> +    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
>>    }
>> +}
>>
>> -  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
>> +/**
>> +  Report Boot Perforamnce table address as report status code.
>>
>> -  if (Token != NULL) {
>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
>> -  }
>> -  if (Module != NULL) {
>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
>> +  @param  Event    The event of notify protocol.
>> +  @param  Context  Notify event context.
>> +
>> +**/
>> +VOID
>> +EFIAPI
>> +ReportFpdtRecordBuffer (
>> +  IN EFI_EVENT     Event,
>> +  IN VOID          *Context
>> +  )
>> +{
>> +  EFI_STATUS      Status;
>> +  UINT64          BPDTAddr;
>> +
>> +  if (!mFpdtBufferIsReported) {
>> +    Status = AllocateBootPerformanceTable ();
>> +    if (!EFI_ERROR(Status)) {
>> +      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
>> +      REPORT_STATUS_CODE_EX (
>> +          EFI_PROGRESS_CODE,
>> +          EFI_SOFTWARE_DXE_BS_DRIVER,
>> +          0,
>> +          NULL,
>> +          &gEfiFirmwarePerformanceGuid,
>> +          &BPDTAddr,
>> +          sizeof (UINT64)
>> +          );
>> +    }
>> +    //
>> +    // Free Cached FPDT record Buffer
>> +    //
>> +    if (mPerformancePointer != NULL) {
>> +      FreePool (mPerformancePointer);
>> +      mPerformancePointer   = NULL;
>> +    }
>> +    mPerformanceLength    = 0;
>> +    mMaxPerformanceLength = 0;
>> +    //
>> +    // Set FPDT report state to TRUE.
>> +    //
>> +    mFpdtBufferIsReported = TRUE;
>>    }
>> +}
>>
>> -  GaugeEntryExArray[Index].EndTimeStamp = 0;
>> -  GaugeEntryExArray[Index].Identifier = Identifier;
>> +/**
>> +  Adds a record at the end of the performance measurement log
>> +  that records the start time of a performance measurement.
>>
>> -  if (TimeStamp == 0) {
>> -    TimeStamp = GetPerformanceCounter ();
>> -  }
>> -  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
>> +  Adds a record to the end of the performance measurement log
>> +  that contains the Handle, Token, Module and Identifier.
>> +  The end time of the new record must be set to zero.
>> +  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>> +  If TimeStamp is zero, the start time in the record is filled in with the value
>> +  read from the current time stamp.
>>
>> -  mGaugeData->NumberOfEntries++;
>> +  @param  Handle                  Pointer to environment specific context used
>> +                                  to identify the component being measured.
>> +  @param  Token                   Pointer to a Null-terminated ASCII string
>> +                                  that identifies the component being measured.
>> +  @param  Module                  Pointer to a Null-terminated ASCII string
>> +                                  that identifies the module being measured.
>> +  @param  TimeStamp               64-bit time stamp.
>> +  @param  Identifier              32-bit identifier. If the value is 0, the created record
>> +                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>
>> -  EfiReleaseLock (&mPerfRecordLock);
>> +  @retval EFI_SUCCESS             The data was read correctly from the device.
>> +  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>
>> -  return EFI_SUCCESS;
>> +**/
>> +EFI_STATUS
>> +EFIAPI
>> +StartGaugeEx (
>> +  IN CONST VOID   *Handle,  OPTIONAL
>> +  IN CONST CHAR8  *Token,   OPTIONAL
>> +  IN CONST CHAR8  *Module,  OPTIONAL
>> +  IN UINT64       TimeStamp,
>> +  IN UINT32       Identifier
>> +  )
>> +{
>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Searches the performance measurement log from the beginning of the log
>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>
>>    Searches the performance measurement log from the beginning of the log
>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>    If the record can not be found then return EFI_NOT_FOUND.
>>    If the record is found and TimeStamp is not zero,
>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>    is filled in with the current time stamp value.
>> @@ -260,89 +1188,19 @@ EndGaugeEx (
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>> -  UINT32              Index;
>> -  EFI_STATUS          Status;
>> -
>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>> -  if (EFI_ERROR (Status)) {
>> -    return Status;
>> -  }
>> -
>> -  if (TimeStamp == 0) {
>> -    TimeStamp = GetPerformanceCounter ();
>> -  }
>> -
>> -  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
>> -  if (Index >= mGaugeData->NumberOfEntries) {
>> -    EfiReleaseLock (&mPerfRecordLock);
>> -    return EFI_NOT_FOUND;
>> -  }
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
>> -
>> -  EfiReleaseLock (&mPerfRecordLock);
>> -  return EFI_SUCCESS;
>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Retrieves a previously logged performance measurement.
>>    It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>    and then assign the Identifier with 0.
>>
>> -  Retrieves the performance log entry from the performance log specified by LogEntryKey.
>> -  If it stands for a valid entry, then EFI_SUCCESS is returned and
>> -  GaugeDataEntryEx stores the pointer to that entry.
>> -
>> -  This internal function is added to avoid releasing lock before each return statement.
>> -
>> -  @param  LogEntryKey             The key for the previous performance measurement log entry.
>> -                                  If 0, then the first performance measurement log entry is retrieved.
>> -  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
>> -                                  if the retrieval is successful.
>> -
>> -  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
>> -  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
>> -  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
>> -  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
>> -
>> -**/
>> -EFI_STATUS
>> -EFIAPI
>> -InternalGetGaugeEx (
>> -  IN  UINTN                 LogEntryKey,
>> -  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>> -  )
>> -{
>> -  UINTN               NumberOfEntries;
>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>> -
>> -  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
>> -  if (LogEntryKey > NumberOfEntries) {
>> -    return EFI_INVALID_PARAMETER;
>> -  }
>> -  if (LogEntryKey == NumberOfEntries) {
>> -    return EFI_NOT_FOUND;
>> -  }
>> -
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -
>> -  if (GaugeDataEntryEx == NULL) {
>> -    return EFI_INVALID_PARAMETER;
>> -  }
>> -  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
>> -
>> -  return EFI_SUCCESS;
>> -}
>> -
>> -/**
>> -  Retrieves a previously logged performance measurement.
>> -  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>> -  and then assign the Identifier with 0.
>> +    !!! Not support!!!
>>
>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>    GaugeDataEntryEx stores the pointer to that entry.
>>
>> @@ -362,22 +1220,11 @@ EFIAPI
>>  GetGaugeEx (
>>    IN  UINTN                 LogEntryKey,
>>    OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>    )
>>  {
>> -  EFI_STATUS                Status;
>> -
>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>> -  if (EFI_ERROR (Status)) {
>> -    return Status;
>> -  }
>> -
>> -  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
>> -
>> -  EfiReleaseLock (&mPerfRecordLock);
>> -
>> -  return Status;
>> +  return EFI_UNSUPPORTED;
>>  }
>>
>>  /**
>>    Adds a record at the end of the performance measurement log
>>    that records the start time of a performance measurement.
>> @@ -452,10 +1299,12 @@ EndGauge (
>>  /**
>>    Retrieves a previously logged performance measurement.
>>    It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
>>    and then eliminate the Identifier.
>>
>> +    !!! Not support!!!
>> +
>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>    GaugeDataEntry stores the pointer to that entry.
>>
>>    @param  LogEntryKey             The key for the previous performance measurement log entry.
>> @@ -474,81 +1323,13 @@ EFIAPI
>>  GetGauge (
>>    IN  UINTN               LogEntryKey,
>>    OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
>>    )
>>  {
>> -  EFI_STATUS          Status;
>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
>> -
>> -  GaugeEntryEx = NULL;
>> -
>> -  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
>> -  if (EFI_ERROR (Status)) {
>> -    return Status;
>> -  }
>> -
>> -  if (GaugeDataEntry == NULL) {
>> -    return EFI_INVALID_PARAMETER;
>> -  }
>> -
>> -  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
>> -
>> -  return EFI_SUCCESS;
>> +  return EFI_UNSUPPORTED;
>>  }
>>
>> -/**
>> -  Dumps all the PEI performance log to DXE performance gauge array.
>> -
>> -  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>> -  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>> -  to DXE performance data structures.
>> -
>> -**/
>> -VOID
>> -InternalGetPeiPerformance (
>> -  VOID
>> -  )
>> -{
>> -  EFI_HOB_GUID_TYPE                 *GuidHob;
>> -  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
>> -  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
>> -  UINT32                            *LogIdArray;
>> -  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
>> -  UINT32                            Index;
>> -  UINT32                            NumberOfEntries;
>> -
>> -  NumberOfEntries = 0;
>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>> -
>> -  //
>> -  // Dump PEI Log Entries to DXE Guage Data structure.
>> -  //
>> -  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
>> -  if (GuidHob != NULL) {
>> -    LogHob          = GET_GUID_HOB_DATA (GuidHob);
>> -    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
>> -
>> -    NumberOfEntries = LogHob->NumberOfEntries;
>> -    for (Index = 0; Index < NumberOfEntries; Index++) {
>> -      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
>> -      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
>> -      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
>> -      GaugeEntryExArray[Index].Identifier     = 0;
>> -    }
>> -
>> -    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
>> -    if (GuidHob != NULL) {
>> -      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
>> -      for (Index = 0; Index < NumberOfEntries; Index++) {
>> -        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
>> -      }
>> -    }
>> -  }
>> -  mGaugeData->NumberOfEntries = NumberOfEntries;
>> -}
>>
>>  /**
>>    The constructor function initializes Performance infrastructure for DXE phase.
>>
>>    The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
>> @@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
>>    IN EFI_HANDLE        ImageHandle,
>>    IN EFI_SYSTEM_TABLE  *SystemTable
>>    )
>>  {
>>    EFI_STATUS                Status;
>> +  EFI_HANDLE                Handle;
>> +  EFI_EVENT                 ReadyToBootEvent;
>>    PERFORMANCE_PROPERTY      *PerformanceProperty;
>>
>> -
>>    if (!PerformanceMeasurementEnabled ()) {
>>      //
>>      // Do not initialize performance infrastructure if not required.
>>      //
>>      return EFI_SUCCESS;
>>    }
>> +
>> +  //
>> +  // Dump normal PEI performance records
>> +  //
>> +  InternalGetPeiPerformance (GetHobList());
>> +
>>    //
>> -  // Install the protocol interfaces.
>> +  // Install the protocol interfaces for DXE performance library instance.
>>    //
>> +  Handle = NULL;
>>    Status = gBS->InstallMultipleProtocolInterfaces (
>> -                  &mHandle,
>> +                  &Handle,
>>                    &gPerformanceProtocolGuid,
>>                    &mPerformanceInterface,
>>                    &gPerformanceExProtocolGuid,
>>                    &mPerformanceExInterface,
>>                    NULL
>>                    );
>>    ASSERT_EFI_ERROR (Status);
>>
>> -  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
>> -                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
>> -                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
>> -
>> -  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
>> -  ASSERT (mGaugeData != NULL);
>> +  //
>> +  // Register ReadyToBoot event to report StatusCode data
>> +  //
>> +  Status = gBS->CreateEventEx (
>> +                  EVT_NOTIFY_SIGNAL,
>> +                  TPL_CALLBACK,
>> +                  ReportFpdtRecordBuffer,
>> +                  NULL,
>> +                  &gEfiEventReadyToBootGuid,
>> +                  &ReadyToBootEvent
>> +                  );
>>
>> -  InternalGetPeiPerformance ();
>> +  ASSERT_EFI_ERROR (Status);
>>
>>    Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
>>    if (EFI_ERROR (Status)) {
>>      //
>>      // Install configuration table for performance property.
>> @@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Searches the performance measurement log from the beginning of the log
>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>
>>    Searches the performance measurement log from the beginning of the log
>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>    If the record can not be found then return RETURN_NOT_FOUND.
>>    If the record is found and TimeStamp is not zero,
>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>    is filled in with the current time stamp value.
>> @@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp,
>>    IN UINT32       Identifier
>>    )
>>  {
>> -  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>  }
>>
>>  /**
>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>    It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
>>    and then assign the Identifier with 0.
>>
>> +    !!! Not support!!!
>> +
>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>> @@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
>>                                    being measured.
>>    @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
>>                                    was started.
>>    @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
>>                                    was ended.
>> -  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
>> +  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
>> +                                  was ended.
>>
>>    @return The key for the next performance log entry (in general case).
>>
>>  **/
>>  UINTN
>>  EFIAPI
>>  GetPerformanceMeasurementEx (
>> -  IN  UINTN       LogEntryKey,
>> +  IN  UINTN       LogEntryKey,
>>    OUT CONST VOID  **Handle,
>>    OUT CONST CHAR8 **Token,
>>    OUT CONST CHAR8 **Module,
>>    OUT UINT64      *StartTimeStamp,
>>    OUT UINT64      *EndTimeStamp,
>>    OUT UINT32      *Identifier
>>    )
>>  {
>> -  EFI_STATUS           Status;
>> -  GAUGE_DATA_ENTRY_EX  *GaugeData;
>> -
>> -  GaugeData = NULL;
>> -
>> -  ASSERT (Handle != NULL);
>> -  ASSERT (Token != NULL);
>> -  ASSERT (Module != NULL);
>> -  ASSERT (StartTimeStamp != NULL);
>> -  ASSERT (EndTimeStamp != NULL);
>> -  ASSERT (Identifier != NULL);
>> -
>> -  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
>> -
>> -  //
>> -  // Make sure that LogEntryKey is a valid log entry key,
>> -  //
>> -  ASSERT (Status != EFI_INVALID_PARAMETER);
>> -
>> -  if (EFI_ERROR (Status)) {
>> -    //
>> -    // The LogEntryKey is the last entry (equals to the total entry number).
>> -    //
>> -    return 0;
>> -  }
>> -
>> -  ASSERT (GaugeData != NULL);
>> -
>> -  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
>> -  *Token          = GaugeData->Token;
>> -  *Module         = GaugeData->Module;
>> -  *StartTimeStamp = GaugeData->StartTimeStamp;
>> -  *EndTimeStamp   = GaugeData->EndTimeStamp;
>> -  *Identifier     = GaugeData->Identifier;
>> -
>> -  return LogEntryKey;
>> +  return 0;
>>  }
>>
>>  /**
>>    Adds a record at the end of the performance measurement log
>>    that records the start time of a performance measurement.
>> @@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
>>    IN CONST CHAR8  *Token,   OPTIONAL
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp
>>    )
>>  {
>> -  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
>>  }
>>
>>  /**
>>    Searches the performance measurement log from the beginning of the log
>>    for the first matching record that contains a zero end time and fills in a valid end time.
>> @@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
>>    IN CONST CHAR8  *Token,   OPTIONAL
>>    IN CONST CHAR8  *Module,  OPTIONAL
>>    IN UINT64       TimeStamp
>>    )
>>  {
>> -  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
>>  }
>>
>>  /**
>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>    It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
>>    and then eliminate the Identifier.
>>
>> +  !!! Not support!!!
>> +
>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>> @@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
>>    OUT CONST CHAR8 **Module,
>>    OUT UINT64      *StartTimeStamp,
>>    OUT UINT64      *EndTimeStamp
>>    )
>>  {
>> -  UINT32 Identifier;
>> -  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
>> +  return 0;
>>  }
>>
>>  /**
>>    Returns TRUE if the performance measurement macros are enabled.
>>
>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>> index 5b89ce2..71c181f 100644
>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>> @@ -7,11 +7,11 @@
>>  #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
>>  #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
>>  #  This library is mainly used by DxeCore to start performance logging to ensure that
>>  #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
>>  #
>> -#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>> +#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>  # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>  #  This program and the accompanying materials
>>  #  are licensed and made available under the terms and conditions of the BSD License
>>  #  which accompanies this distribution.  The full text of the license may be found at
>>  #  http://opensource.org/licenses/bsd-license.php
>> @@ -48,27 +48,39 @@
>>
>>
>>  [LibraryClasses]
>>    MemoryAllocationLib
>>    UefiBootServicesTableLib
>> +  UefiRuntimeServicesTableLib
>>    PcdLib
>>    TimerLib
>>    BaseMemoryLib
>>    BaseLib
>>    HobLib
>>    DebugLib
>>    UefiLib
>> +  ReportStatusCodeLib
>> +  DxeServicesLib
>> +  PeCoffGetEntryPointLib
>> +
>> +[Protocols]
>> +  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
>>
>>
>>  [Guids]
>>    ## SOMETIMES_CONSUMES   ## HOB
>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>    ## PRODUCES             ## SystemTable
>>    gPerformanceProtocolGuid
>>    ## SOMETIMES_CONSUMES   ## HOB
>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>    gPerformanceExProtocolGuid
>> +  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
>> +  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
>> +  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
>> +  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
>> +  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
>>
>>  [Pcd]
>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
>> -  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
>> +  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>> index f1540d8..7e79675 100644
>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>> @@ -2,11 +2,11 @@
>>    Master header files for DxeCorePerformanceLib instance.
>>
>>    This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
>>    library instance at its constructor.
>>
>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>  This program and the accompanying materials
>>  are licensed and made available under the terms and conditions of the BSD License
>>  which accompanies this distribution.  The full text of the license may be found at
>>  http://opensource.org/licenses/bsd-license.php
>>
>> @@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>
>>
>>  #include <PiDxe.h>
>>
>>  #include <Guid/Performance.h>
>> +#include <Guid/ExtendedFirmwarePerformance.h>
>> +#include <Guid/ZeroGuid.h>
>> +#include <Guid/EventGroup.h>
>> +#include <Guid/FirmwarePerformance.h>
>> +#include <Guid/PiSmmCommunicationRegionTable.h>
>> +
>> +#include <Protocol/DriverBinding.h>
>> +#include <Protocol/LoadedImage.h>
>> +#include <Protocol/ComponentName2.h>
>> +#include <Protocol/DevicePathToText.h>
>> +#include <Protocol/SmmCommunication.h>
>>
>>  #include <Library/PerformanceLib.h>
>>  #include <Library/DebugLib.h>
>>  #include <Library/HobLib.h>
>>  #include <Library/BaseLib.h>
>>  #include <Library/BaseMemoryLib.h>
>>  #include <Library/TimerLib.h>
>>  #include <Library/PcdLib.h>
>>  #include <Library/UefiBootServicesTableLib.h>
>> +#include <Library/UefiRuntimeServicesTableLib.h>
>>  #include <Library/MemoryAllocationLib.h>
>>  #include <Library/UefiLib.h>
>> +#include <Library/ReportStatusCodeLib.h>
>> +#include <Library/DxeServicesLib.h>
>> +#include <Library/PeCoffGetEntryPointLib.h>
>>
>>  //
>>  // Interface declarations for PerformanceEx Protocol.
>>  //
>>  /**
>> --
>> 1.9.5.msysgit.1
>>
>> _______________________________________________
>> edk2-devel mailing list
>> edk2-devel@lists.01.org
>> https://lists.01.org/mailman/listinfo/edk2-devel
_______________________________________________
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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Ard Biesheuvel 6 years, 7 months ago
pd On 22 May 2018 at 10:58, Zeng, Star <star.zeng@intel.com> wrote:
> How about the code to try allocating <4G memory, then try allocating any memory if failed to allocate <4G memory?
>
> For example, the code snippet in SmbiosDxe.c.
>
>     PhysicalAddress = 0xffffffff;
>     Status = gBS->AllocatePages (
>                     AllocateMaxAddress,
>                     EfiRuntimeServicesData,
>                     EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>                     &PhysicalAddress
>                     );
>     if (EFI_ERROR (Status)) {
>       DEBUG ((EFI_D_ERROR, "SmbiosCreateTable () could not allocate EntryPointStructure < 4GB\n"));
>       Status = gBS->AllocatePages (
>                       AllocateAnyPages,
>                       EfiRuntimeServicesData,
>                       EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>                       &PhysicalAddress
>                       );
>      if (EFI_ERROR (Status)) {
>         return EFI_OUT_OF_RESOURCES;
>       }
>     }
>

Yes, that should do the trick.

But perhaps we should add something like

AllocatePeiAccessiblePages()

to MemoryAllocationLib, which just uses AllocateMaxAddress or
AllocateAnyPages depending on whether MDE_CPU_X64 is #defined.

-- 
Ard.

> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
> Sent: Tuesday, May 22, 2018 4:52 PM
> To: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>
> Cc: Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>
> (+ Laszlo, Andrew, Mike)
>
> On 22 May 2018 at 02:33, Bi, Dandan <dandan.bi@intel.com> wrote:
>> Sorry for the delayed response.
>>
>> The allocated  performance table ( below 4G ) is to save the boot performance data in normal boot and S3 phase.
>> PEIM FirmwarePerformancePei will get the address of the performance table and update the performance date of S3 phase to the table.
>> The address need to be handled in PEI phase(32bit), that's the main reason why we allocate it below 4G.
>>
>
> The 32-bit PEI + 64-bit DXE combo is specific to X64. You have added
> code to a generic library that ASSERT()s if allocating memory below 4
> GB fails, breaking non-PC architectures.
>
> So please, fix this. Or at least suggest a way around it so that other
> architectures can keep using this library.
>
> This is another consequence of our failure to model the special 32-bit
> PEI/64-bit DXE combination using proper PI interfaces, resulting in
> these kinds of breakages and open coded 4 GB allocations all
> throughout the code. Can we please work on getting this fixed?
>
>
>> -----Original Message-----
>> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
>> Sent: Wednesday, May 2, 2018 12:27 AM
>> To: Bi, Dandan <dandan.bi@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>
>> Cc: edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
>> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>>
>> On 30 January 2018 at 14:53, Dandan Bi <dandan.bi@intel.com> wrote:
>>> V2:
>>> Update DxecorePerformanceLib to report the boot performance table
>>> address instead of records contents.
>>>
>>> Updated to convert Pref entry to FPDT record in DXE phase and then
>>> allocate boot performance table to save the record and report
>>> the address of boot performance table to FirmwarePerformanceDxe.
>>>
>>> Cc: Liming Gao <liming.gao@intel.com>
>>> Cc: Star Zeng <star.zeng@intel.com>
>>> Contributed-under: TianoCore Contribution Agreement 1.1
>>> Signed-off-by: Dandan Bi <dandan.bi@intel.com>
>>> ---
>>>  .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
>>>  .../DxeCorePerformanceLib.inf                      |   20 +-
>>>  .../DxeCorePerformanceLibInternal.h                |   17 +-
>>>  3 files changed, 1108 insertions(+), 318 deletions(-)
>>>
>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>> index 7c0e207..c6f8a16 100644
>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>> @@ -8,11 +8,11 @@
>>>    which are consumed by DxePerformanceLib to logging performance data in DXE phase.
>>>
>>>    This library is mainly used by DxeCore to start performance logging to ensure that
>>>    Performance Protocol is installed at the very beginning of DXE phase.
>>>
>>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>>  This program and the accompanying materials
>>>  are licensed and made available under the terms and conditions of the BSD License
>>>  which accompanies this distribution.  The full text of the license may be found at
>>>  http://opensource.org/licenses/bsd-license.php
>>> @@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>>  **/
>>>
>>>
>>>  #include "DxeCorePerformanceLibInternal.h"
>>>
>>> -
>>>  //
>>> -// The data structure to hold global performance data.
>>> +// Data for FPDT performance records.
>>>  //
>>> -GAUGE_DATA_HEADER    *mGaugeData;
>>> +#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
>>> +#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
>>> +#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
>>> +#define FIRMWARE_RECORD_BUFFER  0x10000
>>> +#define CACHE_HANDLE_GUID_COUNT 0x1000
>>> +
>>> +BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
>>> +BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
>>> +  {
>>> +    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
>>> +    sizeof (BOOT_PERFORMANCE_TABLE)
>>> +  },
>>> +  {
>>> +    {
>>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
>>> +      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
>>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
>>> +    },
>>> +    0,  // Reserved
>>> +    //
>>> +    // These values will be updated at runtime.
>>> +    //
>>> +    0,  // ResetEnd
>>> +    0,  // OsLoaderLoadImageStart
>>> +    0,  // OsLoaderStartImageStart
>>> +    0,  // ExitBootServicesEntry
>>> +    0   // ExitBootServicesExit
>>> +  }
>>> +};
>>>
>>> -//
>>> -// The current maximum number of logging entries. If current number of
>>> -// entries exceeds this value, it will re-allocate a larger array and
>>> -// migration the old data to the larger array.
>>> -//
>>> -UINT32               mMaxGaugeRecords;
>>> +typedef struct {
>>> +  EFI_HANDLE    Handle;
>>> +  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>>> +  EFI_GUID      ModuleGuid;
>>> +} HANDLE_GUID_MAP;
>>>
>>> -//
>>> -// The handle to install Performance Protocol instance.
>>> -//
>>> -EFI_HANDLE           mHandle = NULL;
>>> +HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
>>> +UINTN           mCachePairCount = 0;
>>> +
>>> +UINT32  mLoadImageCount       = 0;
>>> +UINT32  mPerformanceLength    = 0;
>>> +UINT32  mMaxPerformanceLength = 0;
>>> +UINT32  mBootRecordSize       = 0;
>>> +UINT32  mBootRecordMaxSize    = 0;
>>> +
>>> +BOOLEAN mFpdtBufferIsReported = FALSE;
>>> +BOOLEAN mLackSpaceIsReported  = FALSE;
>>> +CHAR8   *mPlatformLanguage    = NULL;
>>> +UINT8   *mPerformancePointer  = NULL;
>>> +UINT8   *mBootRecordBuffer    = NULL;
>>> +
>>> +EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
>>>
>>>  //
>>>  // Interfaces for Performance Protocol.
>>>  //
>>>  PERFORMANCE_PROTOCOL mPerformanceInterface = {
>>> @@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
>>>    GetGaugeEx
>>>    };
>>>
>>>  PERFORMANCE_PROPERTY  mPerformanceProperty;
>>>
>>> -//
>>> -//  Gauge record lock to avoid data corruption or even memory overflow
>>> -//
>>> -STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
>>> +/**
>>> +Check whether the Token is a known one which is uesed by core.
>>> +
>>> +@param  Token      Pointer to a Null-terminated ASCII string
>>> +
>>> +@retval TRUE       Is a known one used by core.
>>> +@retval FALSE      Not a known one.
>>> +
>>> +**/
>>> +BOOLEAN
>>> +IsKnownTokens (
>>> +  IN CONST CHAR8  *Token
>>> +  )
>>> +{
>>> +  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, PEI_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DXE_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, BDS_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, PEIM_TOK) == 0) {
>>> +    return TRUE;
>>> +  } else {
>>> +    return FALSE;
>>> +  }
>>> +}
>>> +
>>> +/**
>>> +Check whether the ID is a known one which map to the known Token.
>>> +
>>> +@param  Identifier  32-bit identifier.
>>> +
>>> +@retval TRUE        Is a known one used by core.
>>> +@retval FALSE       Not a known one.
>>> +
>>> +**/
>>> +BOOLEAN
>>> +IsKnownID (
>>> +  IN UINT32       Identifier
>>> +  )
>>> +{
>>> +  if (Identifier == MODULE_START_ID ||
>>> +      Identifier == MODULE_END_ID ||
>>> +      Identifier == MODULE_LOADIMAGE_START_ID ||
>>> +      Identifier == MODULE_LOADIMAGE_END_ID ||
>>> +      Identifier == MODULE_DB_START_ID ||
>>> +      Identifier == MODULE_DB_END_ID ||
>>> +      Identifier == MODULE_DB_SUPPORT_START_ID ||
>>> +      Identifier == MODULE_DB_SUPPORT_END_ID ||
>>> +      Identifier == MODULE_DB_STOP_START_ID ||
>>> +      Identifier == MODULE_DB_STOP_END_ID) {
>>> +    return TRUE;
>>> +  } else {
>>> +    return FALSE;
>>> +  }
>>> +}
>>>
>>>  /**
>>> -  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
>>> +  Allocate EfiReservedMemoryType below 4G memory address.
>>> +
>>> +  This function allocates EfiReservedMemoryType below 4G memory address.
>>> +
>>> +  @param[in]  Size   Size of memory to allocate.
>>> +
>>> +  @return Allocated address for output.
>>> +
>>> +**/
>>> +VOID *
>>> +FpdtAllocateReservedMemoryBelow4G (
>>> +  IN UINTN       Size
>>> +  )
>>> +{
>>> +  UINTN                 Pages;
>>> +  EFI_PHYSICAL_ADDRESS  Address;
>>> +  EFI_STATUS            Status;
>>> +  VOID                  *Buffer;
>>> +
>>> +  Buffer  = NULL;
>>> +  Pages   = EFI_SIZE_TO_PAGES (Size);
>>> +  Address = 0xffffffff;
>>> +
>>> +  Status = gBS->AllocatePages (
>>> +                  AllocateMaxAddress,
>>> +                  EfiReservedMemoryType,
>>> +                  Pages,
>>> +                  &Address
>>> +                  );
>>> +  ASSERT_EFI_ERROR (Status);
>>
>> This code is breaking DEBUG builds on ARM systems that have no memory
>> below 4 GB.
>>
>>> +
>>> +  if (!EFI_ERROR (Status)) {
>>> +    Buffer = (VOID *) (UINTN) Address;
>>> +    ZeroMem (Buffer, Size);
>>> +  }
>>> +
>>> +  return Buffer;
>>> +}
>>> +
>>> +/**
>>> +  Allocate buffer for Boot Performance table.
>>> +
>>> +  @return Status code.
>>> +
>>> +**/
>>> +EFI_STATUS
>>> +AllocateBootPerformanceTable (
>>> +  )
>>> +{
>>> +  EFI_STATUS                    Status;
>>> +  UINTN                         Size;
>>> +  UINT8                         *SmmBootRecordCommBuffer;
>>> +  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
>>> +  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
>>> +  UINTN                         CommSize;
>>> +  UINTN                         BootPerformanceDataSize;
>>> +  UINT8                         *BootPerformanceData;
>>> +  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
>>> +  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
>>> +  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
>>> +  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
>>> +  UINTN                         Index;
>>> +  VOID                          *SmmBootRecordData;
>>> +  UINTN                         SmmBootRecordDataSize;
>>> +  UINTN                         ReservedMemSize;
>>> +
>>> +  //
>>> +  // Collect boot records from SMM drivers.
>>> +  //
>>> +  SmmBootRecordCommBuffer = NULL;
>>> +  SmmCommData             = NULL;
>>> +  SmmBootRecordData       = NULL;
>>> +  SmmBootRecordDataSize   = 0;
>>> +  ReservedMemSize         = 0;
>>> +  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
>>> +  if (!EFI_ERROR (Status)) {
>>> +    //
>>> +    // Initialize communicate buffer
>>> +    // Get the prepared Reserved Memory Range
>>> +    //
>>> +    Status = EfiGetSystemConfigurationTable (
>>> +              &gEdkiiPiSmmCommunicationRegionTableGuid,
>>> +              (VOID **) &SmmCommRegionTable
>>> +              );
>>> +    if (!EFI_ERROR (Status)) {
>>> +      ASSERT (SmmCommRegionTable != NULL);
>>> +      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
>>> +      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
>>> +        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
>>> +          break;
>>> +        }
>>> +        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
>>> +      }
>>> +      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
>>> +      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
>>> +      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
>>> +      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
>>> +
>>> +      //
>>> +      // Check enough reserved memory space
>>> +      //
>>> +      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
>>> +        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
>>> +        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
>>> +        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
>>> +        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
>>> +
>>> +        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
>>> +        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
>>> +        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
>>> +
>>> +        //
>>> +        // Get the size of boot records.
>>> +        //
>>> +        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
>>> +        SmmCommData->BootRecordData = NULL;
>>> +        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>>> +        ASSERT_EFI_ERROR (Status);
>>> +
>>> +        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
>>> +          //
>>> +          // Get all boot records
>>> +          //
>>> +          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
>>> +          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
>>> +          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
>>> +          ASSERT (SmmBootRecordData  != NULL);
>>> +          SmmCommData->BootRecordOffset = 0;
>>> +          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
>>> +          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
>>> +          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
>>> +            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>>> +            ASSERT_EFI_ERROR (Status);
>>> +            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
>>> +            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
>>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
>>> +            } else {
>>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
>>> +            }
>>> +            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
>>> +          }
>>> +        }
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  //
>>> +  // Prepare memory for Boot Performance table.
>>> +  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
>>> +  //
>>> +  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>>> +  if (SmmCommData != NULL) {
>>> +    BootPerformanceDataSize += SmmBootRecordDataSize;
>>> +  }
>>> +
>>> +  //
>>> +  // Try to allocate the same runtime buffer as last time boot.
>>> +  //
>>> +  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
>>> +  Size = sizeof (PerformanceVariable);
>>> +  Status = gRT->GetVariable (
>>> +                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>>> +                  &gEfiFirmwarePerformanceGuid,
>>> +                  NULL,
>>> +                  &Size,
>>> +                  &PerformanceVariable
>>> +                  );
>>> +  if (!EFI_ERROR (Status)) {
>>> +    Status = gBS->AllocatePages (
>>> +                    AllocateAddress,
>>> +                    EfiReservedMemoryType,
>>> +                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
>>> +                    &PerformanceVariable.BootPerformanceTablePointer
>>> +                    );
>>> +    if (!EFI_ERROR (Status)) {
>>> +      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
>>> +    }
>>> +  }
>>> +
>>> +  if (mAcpiBootPerformanceTable == NULL) {
>>> +    //
>>> +    // Fail to allocate at specified address, continue to allocate at any address.
>>> +    //
>>> +    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);
>>
>> Why does this allocation need to live below 4 GB?
>>
>> If there is no good reason, can we please get rid of this?
>> If there is a good reason, can we please document it in the code?
>>
>>> +  }
>>> +  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
>>> +
>>> +  if (mAcpiBootPerformanceTable == NULL) {
>>> +    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>>> +      FreePool (SmmBootRecordData);
>>> +    }
>>> +    return EFI_OUT_OF_RESOURCES;
>>> +  }
>>> +
>>> +  //
>>> +  // Prepare Boot Performance Table.
>>> +  //
>>> +  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
>>> +  //
>>> +  // Fill Basic Boot record to Boot Performance Table.
>>> +  //
>>> +  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
>>> +  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
>>> +  //
>>> +  // Fill Boot records from boot drivers.
>>> +  //
>>> +  if (mPerformancePointer != NULL) {
>>> +    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
>>> +    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
>>> +    BootPerformanceData = BootPerformanceData + mPerformanceLength;
>>> +  }
>>> +  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>>> +    //
>>> +    // Fill Boot records from SMM drivers.
>>> +    //
>>> +    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
>>> +    FreePool (SmmBootRecordData);
>>> +    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
>>> +    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
>>> +  }
>>> +
>>> +  //
>>> +  // Save Boot Performance Table address to Variable for use in S4 resume.
>>> +  //
>>> +  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
>>> +
>>> +  //
>>> +  // Save Runtime Performance Table pointers to Variable.
>>> +  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
>>> +  //
>>> +  gRT->SetVariable (
>>> +        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>>> +        &gEfiFirmwarePerformanceGuid,
>>> +        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
>>> +        sizeof (PerformanceVariable),
>>> +        &PerformanceVariable
>>> +        );
>>> +
>>> +  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
>>> +  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
>>> +  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>>> +
>>> +  return EFI_SUCCESS;
>>> +}
>>> +
>>> +/**
>>> +  Get a human readable module name and module guid for the given image handle.
>>> +  If module name can't be found, "" string will return.
>>> +  If module guid can't be found, Zero Guid will return.
>>> +
>>> +  @param    Handle        Image handle or Controller handle.
>>> +  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
>>> +  @param    BufferSize    Size of the input NameString buffer.
>>> +  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
>>> +
>>> +  @retval EFI_SUCCESS     Successfully get module name and guid.
>>> +  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
>>> +  @retval other value  Module Name can't be got.
>>> +**/
>>> +EFI_STATUS
>>> +GetModuleInfoFromHandle (
>>> +  IN EFI_HANDLE  Handle,
>>> +  OUT CHAR8            *NameString,
>>> +  IN UINTN             BufferSize,
>>> +  OUT EFI_GUID         *ModuleGuid OPTIONAL
>>> +  )
>>> +{
>>> +  EFI_STATUS                  Status;
>>> +  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
>>> +  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
>>> +  CHAR8                       *PdbFileName;
>>> +  EFI_GUID                    *TempGuid;
>>> +  UINTN                       StartIndex;
>>> +  UINTN                       Index;
>>> +  INTN                        Count;
>>> +  BOOLEAN                     ModuleGuidIsGet;
>>> +  UINTN                       StringSize;
>>> +  CHAR16                      *StringPtr;
>>> +  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
>>> +  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
>>> +
>>> +  if (NameString == NULL || BufferSize == 0) {
>>> +    return EFI_INVALID_PARAMETER;
>>> +  }
>>> +  //
>>> +  // Try to get the ModuleGuid and name string form the caached array.
>>> +  //
>>> +  if (mCachePairCount > 0) {
>>> +    for (Count = mCachePairCount -1; Count >= 0; Count--) {
>>> +      if (Handle == mCacheHandleGuidTable[Count].Handle) {
>>> +        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
>>> +        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
>>> +        return EFI_SUCCESS;
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  Status = EFI_INVALID_PARAMETER;
>>> +  LoadedImage     = NULL;
>>> +  ModuleGuidIsGet = FALSE;
>>> +
>>> +  //
>>> +  // Initialize GUID as zero value.
>>> +  //
>>> +  TempGuid    = &gZeroGuid;
>>> +  //
>>> +  // Initialize it as "" string.
>>> +  //
>>> +  NameString[0] = 0;
>>> +
>>> +  if (Handle != NULL) {
>>> +    //
>>> +    // Try Handle as ImageHandle.
>>> +    //
>>> +    Status = gBS->HandleProtocol (
>>> +                  Handle,
>>> +                  &gEfiLoadedImageProtocolGuid,
>>> +                  (VOID**) &LoadedImage
>>> +                  );
>>> +
>>> +    if (EFI_ERROR (Status)) {
>>> +      //
>>> +      // Try Handle as Controller Handle
>>> +      //
>>> +      Status = gBS->OpenProtocol (
>>> +                    Handle,
>>> +                    &gEfiDriverBindingProtocolGuid,
>>> +                    (VOID **) &DriverBinding,
>>> +                    NULL,
>>> +                    NULL,
>>> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
>>> +                    );
>>> +      if (!EFI_ERROR (Status)) {
>>> +        //
>>> +        // Get Image protocol from ImageHandle
>>> +        //
>>> +        Status = gBS->HandleProtocol (
>>> +                      DriverBinding->ImageHandle,
>>> +                      &gEfiLoadedImageProtocolGuid,
>>> +                      (VOID**) &LoadedImage
>>> +                      );
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
>>> +    //
>>> +    // Get Module Guid from DevicePath.
>>> +    //
>>> +    if (LoadedImage->FilePath != NULL &&
>>> +        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
>>> +        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
>>> +       ) {
>>> +      //
>>> +      // Determine GUID associated with module logging performance
>>> +      //
>>> +      ModuleGuidIsGet = TRUE;
>>> +      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
>>> +      TempGuid        = &FvFilePath->FvFileName;
>>> +    }
>>> +
>>> +    //
>>> +    // Method 1 Get Module Name from PDB string.
>>> +    //
>>> +    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
>>> +    if (PdbFileName != NULL && BufferSize > 0) {
>>> +      StartIndex = 0;
>>> +      for (Index = 0; PdbFileName[Index] != 0; Index++) {
>>> +        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
>>> +          StartIndex = Index + 1;
>>> +        }
>>> +      }
>>> +      //
>>> +      // Copy the PDB file name to our temporary string.
>>> +      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
>>> +      //
>>> +      for (Index = 0; Index < BufferSize - 1; Index++) {
>>> +        NameString[Index] = PdbFileName[Index + StartIndex];
>>> +        if (NameString[Index] == 0 || NameString[Index] == '.') {
>>> +          NameString[Index] = 0;
>>> +          break;
>>> +        }
>>> +      }
>>>
>>> -  This internal function searches for the gauge entry in the gauge array.
>>> -  If there is an entry that exactly matches the given keywords
>>> -  and its end time stamp is zero, then the index of that gauge entry is returned;
>>> -  otherwise, the the number of gauge entries in the array is returned.
>>> +      if (Index == BufferSize - 1) {
>>> +        NameString[Index] = 0;
>>> +      }
>>> +      //
>>> +      // Module Name is got.
>>> +      //
>>> +      goto Done;
>>> +    }
>>> +  }
>>>
>>> +  //
>>> +  // Method 2: Get the name string from ComponentName2 protocol
>>> +  //
>>> +  Status = gBS->HandleProtocol (
>>> +                  Handle,
>>> +                  &gEfiComponentName2ProtocolGuid,
>>> +                  (VOID **) &ComponentName2
>>> +                  );
>>> +  if (!EFI_ERROR (Status)) {
>>> +    //
>>> +    // Get the current platform language setting
>>> +    //
>>> +    if (mPlatformLanguage == NULL) {
>>> +      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
>>> +    }
>>> +    if (mPlatformLanguage != NULL) {
>>> +      Status = ComponentName2->GetDriverName (
>>> +                                 ComponentName2,
>>> +                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
>>> +                                 &StringPtr
>>> +                                 );
>>> +      if (!EFI_ERROR (Status)) {
>>> +        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>>> +          NameString[Index] = (CHAR8) StringPtr[Index];
>>> +        }
>>> +        NameString[Index] = 0;
>>> +        //
>>> +        // Module Name is got.
>>> +        //
>>> +        goto Done;
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  if (ModuleGuidIsGet) {
>>> +    //
>>> +    // Method 3 Try to get the image's FFS UI section by image GUID
>>> +    //
>>> +    StringPtr  = NULL;
>>> +    StringSize = 0;
>>> +    Status = GetSectionFromAnyFv (
>>> +              TempGuid,
>>> +              EFI_SECTION_USER_INTERFACE,
>>> +              0,
>>> +              (VOID **) &StringPtr,
>>> +              &StringSize
>>> +              );
>>> +
>>> +    if (!EFI_ERROR (Status)) {
>>> +      //
>>> +      // Method 3. Get the name string from FFS UI section
>>> +      //
>>> +      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>>> +        NameString[Index] = (CHAR8) StringPtr[Index];
>>> +      }
>>> +      NameString[Index] = 0;
>>> +      FreePool (StringPtr);
>>> +    }
>>> +  }
>>> +
>>> +Done:
>>> +  //
>>> +  // Copy Module Guid
>>> +  //
>>> +  if (ModuleGuid != NULL) {
>>> +    CopyGuid (ModuleGuid, TempGuid);
>>> +    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
>>> +        // Handle is GUID
>>> +      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
>>> +    }
>>> +  }
>>> +
>>> +  //
>>> +  // Cache the Handle and Guid pairs.
>>> +  //
>>> +  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
>>> +    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
>>> +    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
>>> +    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
>>> +    mCachePairCount ++;
>>> +  }
>>> +
>>> +  return Status;
>>> +}
>>> +
>>> +/**
>>> +  Get the FPDT record info.
>>> +
>>> +  @param  IsStart                 TRUE if the performance log is start log.
>>>    @param  Handle                  Pointer to environment specific context used
>>>                                    to identify the component being measured.
>>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>>                                    that identifies the component being measured.
>>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>>                                    that identifies the module being measured.
>>> -  @param  Identifier              32-bit identifier.
>>> +  @param  RecordInfo              On return, pointer to the info of the record.
>>> +  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
>>> +                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
>>>
>>> -  @retval The index of gauge entry in the array.
>>> +  @retval EFI_SUCCESS          Get record info successfully.
>>> +  @retval EFI_UNSUPPORTED      No matched FPDT record.
>>>
>>>  **/
>>> -UINT32
>>> -InternalSearchForGaugeEntry (
>>> -  IN CONST VOID                 *Handle,  OPTIONAL
>>> -  IN CONST CHAR8                *Token,   OPTIONAL
>>> -  IN CONST CHAR8                *Module,   OPTIONAL
>>> -  IN UINT32                     Identifier
>>> +EFI_STATUS
>>> +GetFpdtRecordInfo (
>>> +  IN BOOLEAN                  IsStart,
>>> +  IN CONST VOID               *Handle,
>>> +  IN CONST CHAR8              *Token,
>>> +  IN CONST CHAR8              *Module,
>>> +  OUT BASIC_RECORD_INFO       *RecordInfo,
>>> +  IN OUT BOOLEAN              *UseModuleName
>>>    )
>>>  {
>>> -  UINT32                    Index;
>>> -  UINT32                    Index2;
>>> -  UINT32                    NumberOfEntries;
>>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>>> +  UINT16              RecordType;
>>> +  UINTN               StringSize;
>>>
>>> -  if (Token == NULL) {
>>> -    Token = "";
>>> -  }
>>> -  if (Module == NULL) {
>>> -    Module = "";
>>> +  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
>>> +
>>> +  //
>>> +  // Token to Type and Id.
>>> +  //
>>> +  if (Token != NULL) {
>>> +    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
>>> +      *UseModuleName = TRUE;
>>> +      RecordType     = GUID_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
>>> +      *UseModuleName = TRUE;
>>> +      RecordType = GUID_QWORD_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
>>> +      *UseModuleName = TRUE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_DB_START_ID;
>>> +        RecordType   = GUID_QWORD_EVENT_TYPE;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_DB_END_ID;
>>> +        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
>>> +      *UseModuleName = TRUE;
>>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>> +        return RETURN_UNSUPPORTED;
>>> +      }
>>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
>>> +      *UseModuleName = TRUE;
>>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>> +         return RETURN_UNSUPPORTED;
>>> +      }
>>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
>>> +               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
>>> +               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
>>> +      }
>>> +    } else {                                                          // Pref used in Modules.
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
>>> +      }
>>> +    }
>>> +  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
>>> +    if (IsStart) {
>>> +      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
>>> +    } else {
>>> +      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
>>> +    }
>>> +  } else {
>>> +    return EFI_UNSUPPORTED;
>>>    }
>>>
>>> -  NumberOfEntries = mGaugeData->NumberOfEntries;
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> +  //
>>> +  // Get Record size baesed on the record type.
>>> +  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
>>> +  //
>>> +  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>> +    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
>>> +    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
>>> +  } else {
>>> +    switch (RecordType) {
>>> +    case GUID_EVENT_TYPE:
>>> +      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
>>> +      break;
>>>
>>> -  Index2 = 0;
>>> +    case DYNAMIC_STRING_EVENT_TYPE:
>>> +      if (*UseModuleName) {
>>> +        StringSize  = STRING_SIZE;
>>> +      } else if (Token  != NULL) {
>>> +        StringSize  = AsciiStrSize (Token);
>>> +      } else if (Module != NULL) {
>>> +        StringSize  = AsciiStrSize (Module);
>>> +      } else {
>>> +        StringSize  = STRING_SIZE;
>>> +      }
>>> +      if (StringSize > STRING_SIZE) {
>>> +        StringSize   = STRING_SIZE;
>>> +      }
>>> +      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
>>> +      break;
>>>
>>> -  for (Index = 0; Index < NumberOfEntries; Index++) {
>>> -    Index2 = NumberOfEntries - 1 - Index;
>>> -    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
>>> -        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
>>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
>>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
>>> -      Index = Index2;
>>> +    case GUID_QWORD_EVENT_TYPE:
>>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
>>>        break;
>>> +
>>> +    case GUID_QWORD_STRING_EVENT_TYPE:
>>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
>>> +      break;
>>> +
>>> +    default:
>>> +      //
>>> +      // Record is unsupported yet, return EFI_UNSUPPORTED
>>> +      //
>>> +      return EFI_UNSUPPORTED;
>>>      }
>>>    }
>>>
>>> -  return Index;
>>> +  RecordInfo->Type = RecordType;
>>> +  return EFI_SUCCESS;
>>>  }
>>>
>>>  /**
>>> -  Adds a record at the end of the performance measurement log
>>> -  that records the start time of a performance measurement.
>>> -
>>> -  Adds a record to the end of the performance measurement log
>>> -  that contains the Handle, Token, Module and Identifier.
>>> -  The end time of the new record must be set to zero.
>>> -  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>>> -  If TimeStamp is zero, the start time in the record is filled in with the value
>>> -  read from the current time stamp.
>>> +  Add performance log to FPDT boot record table.
>>>
>>> +  @param  IsStart                 TRUE if the performance log is start log.
>>>    @param  Handle                  Pointer to environment specific context used
>>>                                    to identify the component being measured.
>>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>>                                    that identifies the component being measured.
>>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>>                                    that identifies the module being measured.
>>> -  @param  TimeStamp               64-bit time stamp.
>>> +  @param  Ticker                  64-bit time stamp.
>>>    @param  Identifier              32-bit identifier. If the value is 0, the created record
>>>                                    is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>>
>>> -  @retval EFI_SUCCESS             The data was read correctly from the device.
>>> +  @retval EFI_SUCCESS             Add FPDT boot record.
>>>    @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>> +  @retval EFI_UNSUPPORTED         No matched FPDT record.
>>>
>>>  **/
>>>  EFI_STATUS
>>> -EFIAPI
>>> -StartGaugeEx (
>>> +InsertFpdtMeasurement (
>>> +  IN BOOLEAN      IsStart,
>>>    IN CONST VOID   *Handle,  OPTIONAL
>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>> -  IN UINT64       TimeStamp,
>>> +  IN UINT64       Ticker,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>>> -  UINTN                     GaugeDataSize;
>>> -  GAUGE_DATA_HEADER         *NewGaugeData;
>>> -  UINTN                     OldGaugeDataSize;
>>> -  GAUGE_DATA_HEADER         *OldGaugeData;
>>> -  UINT32                    Index;
>>> -  EFI_STATUS                Status;
>>> +  EFI_GUID                     ModuleGuid;
>>> +  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>>> +  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
>>> +  EFI_STATUS                   Status;
>>> +  FPDT_RECORD_PTR              FpdtRecordPtr;
>>> +  BASIC_RECORD_INFO            RecordInfo;
>>> +  UINT64                       TimeStamp;
>>> +  UINTN                        DestMax;
>>> +  UINTN                        StrLength;
>>> +  CONST CHAR8                  *StringPtr;
>>> +  BOOLEAN                      UseModuleName;
>>> +
>>> +  StringPtr     = NULL;
>>> +  UseModuleName = FALSE;
>>> +  ZeroMem (ModuleName, sizeof (ModuleName));
>>> +  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
>>>
>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>> +  //
>>> +  // Get record info (type, size, ProgressID and Module Guid).
>>> +  //
>>> +  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
>>>    if (EFI_ERROR (Status)) {
>>>      return Status;
>>>    }
>>>
>>> -  Index = mGaugeData->NumberOfEntries;
>>> -  if (Index >= mMaxGaugeRecords) {
>>> +  //
>>> +  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
>>> +  // !!! Note: If the Pref is not the known Token used in the core but have same
>>> +  // ID with the core Token, this case will not be supported.
>>> +  // And in currtnt usage mode, for the unkown ID, there is a general rule:
>>> +  // If it is start pref: the lower 4 bits of the ID should be 0.
>>> +  // If it is end pref: the lower 4 bits of the ID should not be 0.
>>> +  // If input ID doesn't follow the rule, we will adjust it.
>>> +  //
>>> +  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>>> +    return EFI_UNSUPPORTED;
>>> +  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>>> +    if (IsStart && ((Identifier & 0x000F) != 0)) {
>>> +      Identifier &= 0xFFF0;
>>> +    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
>>> +      Identifier += 1;
>>> +    }
>>> +    RecordInfo.ProgressID = (UINT16)Identifier;
>>> +  }
>>> +
>>> +  if (mFpdtBufferIsReported) {
>>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
>>> +  } else {
>>> +    //
>>> +    // Check if pre-allocated buffer is full
>>>      //
>>> -    // Try to enlarge the scale of gauge array.
>>> +    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
>>> +      mPerformancePointer = ReallocatePool (
>>> +                              mPerformanceLength,
>>> +                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
>>> +                              mPerformancePointer
>>> +                              );
>>> +
>>> +      if (mPerformancePointer == NULL) {
>>> +        return EFI_OUT_OF_RESOURCES;
>>> +      }
>>> +      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
>>> +    }
>>>      //
>>> -    OldGaugeData      = mGaugeData;
>>> -    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
>>> +    // Covert buffer to FPDT Ptr Union type.
>>> +    //
>>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
>>> +  }
>>> +  FpdtRecordPtr.RecordHeader->Length = 0;
>>>
>>> -    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
>>> +  //
>>> +  // Get the TimeStamp.
>>> +  //
>>> +  if (Ticker == 0) {
>>> +    Ticker    = GetPerformanceCounter ();
>>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>>> +  } else if (Ticker == 1) {
>>> +    TimeStamp = 0;
>>> +  } else {
>>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>>> +  }
>>>
>>> -    NewGaugeData = AllocateZeroPool (GaugeDataSize);
>>> -    if (NewGaugeData == NULL) {
>>> -      EfiReleaseLock (&mPerfRecordLock);
>>> -      return EFI_OUT_OF_RESOURCES;
>>> +  //
>>> +  // Get the ModuleName and ModuleGuid form the handle.
>>> +  //
>>> +  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
>>> +
>>> +  //
>>> +  // Fill in the record information.
>>> +  //
>>> +  switch (RecordInfo.Type) {
>>> +  case GUID_EVENT_TYPE:
>>> +    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
>>> +    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
>>> +    break;
>>> +
>>> +  case DYNAMIC_STRING_EVENT_TYPE:
>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
>>> +
>>> +    if (UseModuleName) {
>>> +      StringPtr     = ModuleName;
>>> +    } else if (Token != NULL) {
>>> +      StringPtr     = Token;
>>> +    } else if (Module != NULL) {
>>> +      StringPtr     = Module;
>>> +    } else if (ModuleName != NULL) {
>>> +      StringPtr     = ModuleName;
>>> +    }
>>> +    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
>>> +      StrLength     = AsciiStrLen (StringPtr);
>>> +      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
>>> +      if (StrLength >= DestMax) {
>>> +        StrLength   = DestMax -1;
>>> +      }
>>> +      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
>>>      }
>>> +    break;
>>> +
>>> +  case GUID_QWORD_EVENT_TYPE:
>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
>>> +    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
>>> +      mLoadImageCount++;
>>> +      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
>>> +    }
>>> +    break;
>>> +
>>> +  case GUID_QWORD_STRING_EVENT_TYPE:
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
>>> +    break;
>>> +
>>> +  default:
>>> +    //
>>> +    // Record is not supported in current DXE phase, return EFI_ABORTED
>>> +    //
>>> +    return EFI_UNSUPPORTED;
>>> +  }
>>> +
>>> +  //
>>> +  // Report record one by one after records have been reported together.
>>> +  //
>>> +  if (mFpdtBufferIsReported) {
>>> +      //
>>> +      // Append Boot records to the boot performance table.
>>> +      //
>>> +      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
>>> +        if (!mLackSpaceIsReported) {
>>> +          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
>>> +          mLackSpaceIsReported = TRUE;
>>> +        }
>>> +        return EFI_OUT_OF_RESOURCES;
>>> +      } else {
>>> +        //
>>> +        // Save boot record into BootPerformance table
>>> +        //
>>> +        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
>>> +        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
>>> +        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
>>> +      }
>>> +  } else {
>>> +    //
>>> +    // Update the cached FPDT record buffer.
>>> +    //
>>> +    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
>>> +  }
>>> +
>>> +  return EFI_SUCCESS;
>>> +}
>>> +
>>> +/**
>>> +  Dumps all the PEI performance.
>>> +
>>> +  @param  HobStart      A pointer to a Guid.
>>>
>>> -    mGaugeData = NewGaugeData;
>>> -    mMaxGaugeRecords *= 2;
>>> +  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>>> +  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>>> +  to DXE performance data structures.
>>>
>>> +**/
>>> +VOID
>>> +InternalGetPeiPerformance (
>>> +  VOID  *HobStart
>>> +  )
>>> +{
>>> +  UINT8                                *FirmwarePerformanceHob;
>>> +  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
>>> +  UINT8                                *EventRec;
>>> +  EFI_HOB_GUID_TYPE                    *GuidHob;
>>> +
>>> +  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
>>> +  while (GuidHob != NULL) {
>>> +    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
>>> +    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
>>> +
>>> +    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
>>> +      mPerformancePointer = ReallocatePool (
>>> +                              mPerformanceLength,
>>> +                              mPerformanceLength +
>>> +                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
>>> +                              FIRMWARE_RECORD_BUFFER,
>>> +                              mPerformancePointer
>>> +                              );
>>> +      ASSERT (mPerformancePointer != NULL);
>>> +      mMaxPerformanceLength = mPerformanceLength +
>>> +                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
>>> +                              FIRMWARE_RECORD_BUFFER;
>>> +    }
>>> +
>>> +    EventRec = mPerformancePointer + mPerformanceLength;
>>> +    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
>>>      //
>>> -    // Initialize new data array and migrate old data one.
>>> +    // Update the used buffer size.
>>>      //
>>> -    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
>>> +    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
>>> +    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
>>>
>>> -    FreePool (OldGaugeData);
>>> +    //
>>> +    // Get next performance guid hob
>>> +    //
>>> +    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
>>>    }
>>> +}
>>>
>>> -  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
>>> +/**
>>> +  Report Boot Perforamnce table address as report status code.
>>>
>>> -  if (Token != NULL) {
>>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
>>> -  }
>>> -  if (Module != NULL) {
>>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
>>> +  @param  Event    The event of notify protocol.
>>> +  @param  Context  Notify event context.
>>> +
>>> +**/
>>> +VOID
>>> +EFIAPI
>>> +ReportFpdtRecordBuffer (
>>> +  IN EFI_EVENT     Event,
>>> +  IN VOID          *Context
>>> +  )
>>> +{
>>> +  EFI_STATUS      Status;
>>> +  UINT64          BPDTAddr;
>>> +
>>> +  if (!mFpdtBufferIsReported) {
>>> +    Status = AllocateBootPerformanceTable ();
>>> +    if (!EFI_ERROR(Status)) {
>>> +      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
>>> +      REPORT_STATUS_CODE_EX (
>>> +          EFI_PROGRESS_CODE,
>>> +          EFI_SOFTWARE_DXE_BS_DRIVER,
>>> +          0,
>>> +          NULL,
>>> +          &gEfiFirmwarePerformanceGuid,
>>> +          &BPDTAddr,
>>> +          sizeof (UINT64)
>>> +          );
>>> +    }
>>> +    //
>>> +    // Free Cached FPDT record Buffer
>>> +    //
>>> +    if (mPerformancePointer != NULL) {
>>> +      FreePool (mPerformancePointer);
>>> +      mPerformancePointer   = NULL;
>>> +    }
>>> +    mPerformanceLength    = 0;
>>> +    mMaxPerformanceLength = 0;
>>> +    //
>>> +    // Set FPDT report state to TRUE.
>>> +    //
>>> +    mFpdtBufferIsReported = TRUE;
>>>    }
>>> +}
>>>
>>> -  GaugeEntryExArray[Index].EndTimeStamp = 0;
>>> -  GaugeEntryExArray[Index].Identifier = Identifier;
>>> +/**
>>> +  Adds a record at the end of the performance measurement log
>>> +  that records the start time of a performance measurement.
>>>
>>> -  if (TimeStamp == 0) {
>>> -    TimeStamp = GetPerformanceCounter ();
>>> -  }
>>> -  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
>>> +  Adds a record to the end of the performance measurement log
>>> +  that contains the Handle, Token, Module and Identifier.
>>> +  The end time of the new record must be set to zero.
>>> +  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>>> +  If TimeStamp is zero, the start time in the record is filled in with the value
>>> +  read from the current time stamp.
>>>
>>> -  mGaugeData->NumberOfEntries++;
>>> +  @param  Handle                  Pointer to environment specific context used
>>> +                                  to identify the component being measured.
>>> +  @param  Token                   Pointer to a Null-terminated ASCII string
>>> +                                  that identifies the component being measured.
>>> +  @param  Module                  Pointer to a Null-terminated ASCII string
>>> +                                  that identifies the module being measured.
>>> +  @param  TimeStamp               64-bit time stamp.
>>> +  @param  Identifier              32-bit identifier. If the value is 0, the created record
>>> +                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>>
>>> -  EfiReleaseLock (&mPerfRecordLock);
>>> +  @retval EFI_SUCCESS             The data was read correctly from the device.
>>> +  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>>
>>> -  return EFI_SUCCESS;
>>> +**/
>>> +EFI_STATUS
>>> +EFIAPI
>>> +StartGaugeEx (
>>> +  IN CONST VOID   *Handle,  OPTIONAL
>>> +  IN CONST CHAR8  *Token,   OPTIONAL
>>> +  IN CONST CHAR8  *Module,  OPTIONAL
>>> +  IN UINT64       TimeStamp,
>>> +  IN UINT32       Identifier
>>> +  )
>>> +{
>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Searches the performance measurement log from the beginning of the log
>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>>
>>>    Searches the performance measurement log from the beginning of the log
>>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>>    If the record can not be found then return EFI_NOT_FOUND.
>>>    If the record is found and TimeStamp is not zero,
>>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>>    is filled in with the current time stamp value.
>>> @@ -260,89 +1188,19 @@ EndGaugeEx (
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>>> -  UINT32              Index;
>>> -  EFI_STATUS          Status;
>>> -
>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>> -  if (EFI_ERROR (Status)) {
>>> -    return Status;
>>> -  }
>>> -
>>> -  if (TimeStamp == 0) {
>>> -    TimeStamp = GetPerformanceCounter ();
>>> -  }
>>> -
>>> -  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
>>> -  if (Index >= mGaugeData->NumberOfEntries) {
>>> -    EfiReleaseLock (&mPerfRecordLock);
>>> -    return EFI_NOT_FOUND;
>>> -  }
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
>>> -
>>> -  EfiReleaseLock (&mPerfRecordLock);
>>> -  return EFI_SUCCESS;
>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Retrieves a previously logged performance measurement.
>>>    It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>>    and then assign the Identifier with 0.
>>>
>>> -  Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>> -  If it stands for a valid entry, then EFI_SUCCESS is returned and
>>> -  GaugeDataEntryEx stores the pointer to that entry.
>>> -
>>> -  This internal function is added to avoid releasing lock before each return statement.
>>> -
>>> -  @param  LogEntryKey             The key for the previous performance measurement log entry.
>>> -                                  If 0, then the first performance measurement log entry is retrieved.
>>> -  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
>>> -                                  if the retrieval is successful.
>>> -
>>> -  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
>>> -  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
>>> -  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
>>> -  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
>>> -
>>> -**/
>>> -EFI_STATUS
>>> -EFIAPI
>>> -InternalGetGaugeEx (
>>> -  IN  UINTN                 LogEntryKey,
>>> -  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>> -  )
>>> -{
>>> -  UINTN               NumberOfEntries;
>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>>> -
>>> -  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
>>> -  if (LogEntryKey > NumberOfEntries) {
>>> -    return EFI_INVALID_PARAMETER;
>>> -  }
>>> -  if (LogEntryKey == NumberOfEntries) {
>>> -    return EFI_NOT_FOUND;
>>> -  }
>>> -
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -
>>> -  if (GaugeDataEntryEx == NULL) {
>>> -    return EFI_INVALID_PARAMETER;
>>> -  }
>>> -  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
>>> -
>>> -  return EFI_SUCCESS;
>>> -}
>>> -
>>> -/**
>>> -  Retrieves a previously logged performance measurement.
>>> -  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>> -  and then assign the Identifier with 0.
>>> +    !!! Not support!!!
>>>
>>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>>    GaugeDataEntryEx stores the pointer to that entry.
>>>
>>> @@ -362,22 +1220,11 @@ EFIAPI
>>>  GetGaugeEx (
>>>    IN  UINTN                 LogEntryKey,
>>>    OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>>    )
>>>  {
>>> -  EFI_STATUS                Status;
>>> -
>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>> -  if (EFI_ERROR (Status)) {
>>> -    return Status;
>>> -  }
>>> -
>>> -  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
>>> -
>>> -  EfiReleaseLock (&mPerfRecordLock);
>>> -
>>> -  return Status;
>>> +  return EFI_UNSUPPORTED;
>>>  }
>>>
>>>  /**
>>>    Adds a record at the end of the performance measurement log
>>>    that records the start time of a performance measurement.
>>> @@ -452,10 +1299,12 @@ EndGauge (
>>>  /**
>>>    Retrieves a previously logged performance measurement.
>>>    It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
>>>    and then eliminate the Identifier.
>>>
>>> +    !!! Not support!!!
>>> +
>>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>>    GaugeDataEntry stores the pointer to that entry.
>>>
>>>    @param  LogEntryKey             The key for the previous performance measurement log entry.
>>> @@ -474,81 +1323,13 @@ EFIAPI
>>>  GetGauge (
>>>    IN  UINTN               LogEntryKey,
>>>    OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
>>>    )
>>>  {
>>> -  EFI_STATUS          Status;
>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
>>> -
>>> -  GaugeEntryEx = NULL;
>>> -
>>> -  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
>>> -  if (EFI_ERROR (Status)) {
>>> -    return Status;
>>> -  }
>>> -
>>> -  if (GaugeDataEntry == NULL) {
>>> -    return EFI_INVALID_PARAMETER;
>>> -  }
>>> -
>>> -  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
>>> -
>>> -  return EFI_SUCCESS;
>>> +  return EFI_UNSUPPORTED;
>>>  }
>>>
>>> -/**
>>> -  Dumps all the PEI performance log to DXE performance gauge array.
>>> -
>>> -  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>>> -  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>>> -  to DXE performance data structures.
>>> -
>>> -**/
>>> -VOID
>>> -InternalGetPeiPerformance (
>>> -  VOID
>>> -  )
>>> -{
>>> -  EFI_HOB_GUID_TYPE                 *GuidHob;
>>> -  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
>>> -  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
>>> -  UINT32                            *LogIdArray;
>>> -  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
>>> -  UINT32                            Index;
>>> -  UINT32                            NumberOfEntries;
>>> -
>>> -  NumberOfEntries = 0;
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -
>>> -  //
>>> -  // Dump PEI Log Entries to DXE Guage Data structure.
>>> -  //
>>> -  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
>>> -  if (GuidHob != NULL) {
>>> -    LogHob          = GET_GUID_HOB_DATA (GuidHob);
>>> -    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
>>> -
>>> -    NumberOfEntries = LogHob->NumberOfEntries;
>>> -    for (Index = 0; Index < NumberOfEntries; Index++) {
>>> -      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
>>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
>>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
>>> -      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
>>> -      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
>>> -      GaugeEntryExArray[Index].Identifier     = 0;
>>> -    }
>>> -
>>> -    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
>>> -    if (GuidHob != NULL) {
>>> -      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
>>> -      for (Index = 0; Index < NumberOfEntries; Index++) {
>>> -        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
>>> -      }
>>> -    }
>>> -  }
>>> -  mGaugeData->NumberOfEntries = NumberOfEntries;
>>> -}
>>>
>>>  /**
>>>    The constructor function initializes Performance infrastructure for DXE phase.
>>>
>>>    The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
>>> @@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
>>>    IN EFI_HANDLE        ImageHandle,
>>>    IN EFI_SYSTEM_TABLE  *SystemTable
>>>    )
>>>  {
>>>    EFI_STATUS                Status;
>>> +  EFI_HANDLE                Handle;
>>> +  EFI_EVENT                 ReadyToBootEvent;
>>>    PERFORMANCE_PROPERTY      *PerformanceProperty;
>>>
>>> -
>>>    if (!PerformanceMeasurementEnabled ()) {
>>>      //
>>>      // Do not initialize performance infrastructure if not required.
>>>      //
>>>      return EFI_SUCCESS;
>>>    }
>>> +
>>> +  //
>>> +  // Dump normal PEI performance records
>>> +  //
>>> +  InternalGetPeiPerformance (GetHobList());
>>> +
>>>    //
>>> -  // Install the protocol interfaces.
>>> +  // Install the protocol interfaces for DXE performance library instance.
>>>    //
>>> +  Handle = NULL;
>>>    Status = gBS->InstallMultipleProtocolInterfaces (
>>> -                  &mHandle,
>>> +                  &Handle,
>>>                    &gPerformanceProtocolGuid,
>>>                    &mPerformanceInterface,
>>>                    &gPerformanceExProtocolGuid,
>>>                    &mPerformanceExInterface,
>>>                    NULL
>>>                    );
>>>    ASSERT_EFI_ERROR (Status);
>>>
>>> -  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
>>> -                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
>>> -                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
>>> -
>>> -  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
>>> -  ASSERT (mGaugeData != NULL);
>>> +  //
>>> +  // Register ReadyToBoot event to report StatusCode data
>>> +  //
>>> +  Status = gBS->CreateEventEx (
>>> +                  EVT_NOTIFY_SIGNAL,
>>> +                  TPL_CALLBACK,
>>> +                  ReportFpdtRecordBuffer,
>>> +                  NULL,
>>> +                  &gEfiEventReadyToBootGuid,
>>> +                  &ReadyToBootEvent
>>> +                  );
>>>
>>> -  InternalGetPeiPerformance ();
>>> +  ASSERT_EFI_ERROR (Status);
>>>
>>>    Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
>>>    if (EFI_ERROR (Status)) {
>>>      //
>>>      // Install configuration table for performance property.
>>> @@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Searches the performance measurement log from the beginning of the log
>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>>
>>>    Searches the performance measurement log from the beginning of the log
>>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>>    If the record can not be found then return RETURN_NOT_FOUND.
>>>    If the record is found and TimeStamp is not zero,
>>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>>    is filled in with the current time stamp value.
>>> @@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>>    It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
>>>    and then assign the Identifier with 0.
>>>
>>> +    !!! Not support!!!
>>> +
>>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>>> @@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
>>>                                    being measured.
>>>    @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
>>>                                    was started.
>>>    @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
>>>                                    was ended.
>>> -  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
>>> +  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
>>> +                                  was ended.
>>>
>>>    @return The key for the next performance log entry (in general case).
>>>
>>>  **/
>>>  UINTN
>>>  EFIAPI
>>>  GetPerformanceMeasurementEx (
>>> -  IN  UINTN       LogEntryKey,
>>> +  IN  UINTN       LogEntryKey,
>>>    OUT CONST VOID  **Handle,
>>>    OUT CONST CHAR8 **Token,
>>>    OUT CONST CHAR8 **Module,
>>>    OUT UINT64      *StartTimeStamp,
>>>    OUT UINT64      *EndTimeStamp,
>>>    OUT UINT32      *Identifier
>>>    )
>>>  {
>>> -  EFI_STATUS           Status;
>>> -  GAUGE_DATA_ENTRY_EX  *GaugeData;
>>> -
>>> -  GaugeData = NULL;
>>> -
>>> -  ASSERT (Handle != NULL);
>>> -  ASSERT (Token != NULL);
>>> -  ASSERT (Module != NULL);
>>> -  ASSERT (StartTimeStamp != NULL);
>>> -  ASSERT (EndTimeStamp != NULL);
>>> -  ASSERT (Identifier != NULL);
>>> -
>>> -  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
>>> -
>>> -  //
>>> -  // Make sure that LogEntryKey is a valid log entry key,
>>> -  //
>>> -  ASSERT (Status != EFI_INVALID_PARAMETER);
>>> -
>>> -  if (EFI_ERROR (Status)) {
>>> -    //
>>> -    // The LogEntryKey is the last entry (equals to the total entry number).
>>> -    //
>>> -    return 0;
>>> -  }
>>> -
>>> -  ASSERT (GaugeData != NULL);
>>> -
>>> -  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
>>> -  *Token          = GaugeData->Token;
>>> -  *Module         = GaugeData->Module;
>>> -  *StartTimeStamp = GaugeData->StartTimeStamp;
>>> -  *EndTimeStamp   = GaugeData->EndTimeStamp;
>>> -  *Identifier     = GaugeData->Identifier;
>>> -
>>> -  return LogEntryKey;
>>> +  return 0;
>>>  }
>>>
>>>  /**
>>>    Adds a record at the end of the performance measurement log
>>>    that records the start time of a performance measurement.
>>> @@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp
>>>    )
>>>  {
>>> -  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
>>>  }
>>>
>>>  /**
>>>    Searches the performance measurement log from the beginning of the log
>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>> @@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp
>>>    )
>>>  {
>>> -  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
>>>  }
>>>
>>>  /**
>>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>>    It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
>>>    and then eliminate the Identifier.
>>>
>>> +  !!! Not support!!!
>>> +
>>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>>> @@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
>>>    OUT CONST CHAR8 **Module,
>>>    OUT UINT64      *StartTimeStamp,
>>>    OUT UINT64      *EndTimeStamp
>>>    )
>>>  {
>>> -  UINT32 Identifier;
>>> -  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
>>> +  return 0;
>>>  }
>>>
>>>  /**
>>>    Returns TRUE if the performance measurement macros are enabled.
>>>
>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>> index 5b89ce2..71c181f 100644
>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>> @@ -7,11 +7,11 @@
>>>  #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
>>>  #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
>>>  #  This library is mainly used by DxeCore to start performance logging to ensure that
>>>  #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
>>>  #
>>> -#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>> +#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>  # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>>  #  This program and the accompanying materials
>>>  #  are licensed and made available under the terms and conditions of the BSD License
>>>  #  which accompanies this distribution.  The full text of the license may be found at
>>>  #  http://opensource.org/licenses/bsd-license.php
>>> @@ -48,27 +48,39 @@
>>>
>>>
>>>  [LibraryClasses]
>>>    MemoryAllocationLib
>>>    UefiBootServicesTableLib
>>> +  UefiRuntimeServicesTableLib
>>>    PcdLib
>>>    TimerLib
>>>    BaseMemoryLib
>>>    BaseLib
>>>    HobLib
>>>    DebugLib
>>>    UefiLib
>>> +  ReportStatusCodeLib
>>> +  DxeServicesLib
>>> +  PeCoffGetEntryPointLib
>>> +
>>> +[Protocols]
>>> +  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
>>>
>>>
>>>  [Guids]
>>>    ## SOMETIMES_CONSUMES   ## HOB
>>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>>    ## PRODUCES             ## SystemTable
>>>    gPerformanceProtocolGuid
>>>    ## SOMETIMES_CONSUMES   ## HOB
>>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>>    gPerformanceExProtocolGuid
>>> +  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
>>> +  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
>>> +  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
>>> +  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
>>> +  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
>>>
>>>  [Pcd]
>>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
>>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
>>> -  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
>>> +  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
>>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
>>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>> index f1540d8..7e79675 100644
>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>> @@ -2,11 +2,11 @@
>>>    Master header files for DxeCorePerformanceLib instance.
>>>
>>>    This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
>>>    library instance at its constructor.
>>>
>>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>  This program and the accompanying materials
>>>  are licensed and made available under the terms and conditions of the BSD License
>>>  which accompanies this distribution.  The full text of the license may be found at
>>>  http://opensource.org/licenses/bsd-license.php
>>>
>>> @@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>>
>>>
>>>  #include <PiDxe.h>
>>>
>>>  #include <Guid/Performance.h>
>>> +#include <Guid/ExtendedFirmwarePerformance.h>
>>> +#include <Guid/ZeroGuid.h>
>>> +#include <Guid/EventGroup.h>
>>> +#include <Guid/FirmwarePerformance.h>
>>> +#include <Guid/PiSmmCommunicationRegionTable.h>
>>> +
>>> +#include <Protocol/DriverBinding.h>
>>> +#include <Protocol/LoadedImage.h>
>>> +#include <Protocol/ComponentName2.h>
>>> +#include <Protocol/DevicePathToText.h>
>>> +#include <Protocol/SmmCommunication.h>
>>>
>>>  #include <Library/PerformanceLib.h>
>>>  #include <Library/DebugLib.h>
>>>  #include <Library/HobLib.h>
>>>  #include <Library/BaseLib.h>
>>>  #include <Library/BaseMemoryLib.h>
>>>  #include <Library/TimerLib.h>
>>>  #include <Library/PcdLib.h>
>>>  #include <Library/UefiBootServicesTableLib.h>
>>> +#include <Library/UefiRuntimeServicesTableLib.h>
>>>  #include <Library/MemoryAllocationLib.h>
>>>  #include <Library/UefiLib.h>
>>> +#include <Library/ReportStatusCodeLib.h>
>>> +#include <Library/DxeServicesLib.h>
>>> +#include <Library/PeCoffGetEntryPointLib.h>
>>>
>>>  //
>>>  // Interface declarations for PerformanceEx Protocol.
>>>  //
>>>  /**
>>> --
>>> 1.9.5.msysgit.1
>>>
>>> _______________________________________________
>>> edk2-devel mailing list
>>> edk2-devel@lists.01.org
>>> https://lists.01.org/mailman/listinfo/edk2-devel
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Zeng, Star 6 years, 7 months ago
It comes to an old question: how to know PEI is 32bit/64bit? But not DXE is 32bit/64bit.

Thanks,
Star
-----Original Message-----
From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org] 
Sent: Tuesday, May 22, 2018 5:03 PM
To: Zeng, Star <star.zeng@intel.com>
Cc: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase

pd On 22 May 2018 at 10:58, Zeng, Star <star.zeng@intel.com> wrote:
> How about the code to try allocating <4G memory, then try allocating any memory if failed to allocate <4G memory?
>
> For example, the code snippet in SmbiosDxe.c.
>
>     PhysicalAddress = 0xffffffff;
>     Status = gBS->AllocatePages (
>                     AllocateMaxAddress,
>                     EfiRuntimeServicesData,
>                     EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>                     &PhysicalAddress
>                     );
>     if (EFI_ERROR (Status)) {
>       DEBUG ((EFI_D_ERROR, "SmbiosCreateTable () could not allocate EntryPointStructure < 4GB\n"));
>       Status = gBS->AllocatePages (
>                       AllocateAnyPages,
>                       EfiRuntimeServicesData,
>                       EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>                       &PhysicalAddress
>                       );
>      if (EFI_ERROR (Status)) {
>         return EFI_OUT_OF_RESOURCES;
>       }
>     }
>

Yes, that should do the trick.

But perhaps we should add something like

AllocatePeiAccessiblePages()

to MemoryAllocationLib, which just uses AllocateMaxAddress or
AllocateAnyPages depending on whether MDE_CPU_X64 is #defined.

-- 
Ard.

> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
> Sent: Tuesday, May 22, 2018 4:52 PM
> To: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>
> Cc: Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>
> (+ Laszlo, Andrew, Mike)
>
> On 22 May 2018 at 02:33, Bi, Dandan <dandan.bi@intel.com> wrote:
>> Sorry for the delayed response.
>>
>> The allocated  performance table ( below 4G ) is to save the boot performance data in normal boot and S3 phase.
>> PEIM FirmwarePerformancePei will get the address of the performance table and update the performance date of S3 phase to the table.
>> The address need to be handled in PEI phase(32bit), that's the main reason why we allocate it below 4G.
>>
>
> The 32-bit PEI + 64-bit DXE combo is specific to X64. You have added
> code to a generic library that ASSERT()s if allocating memory below 4
> GB fails, breaking non-PC architectures.
>
> So please, fix this. Or at least suggest a way around it so that other
> architectures can keep using this library.
>
> This is another consequence of our failure to model the special 32-bit
> PEI/64-bit DXE combination using proper PI interfaces, resulting in
> these kinds of breakages and open coded 4 GB allocations all
> throughout the code. Can we please work on getting this fixed?
>
>
>> -----Original Message-----
>> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
>> Sent: Wednesday, May 2, 2018 12:27 AM
>> To: Bi, Dandan <dandan.bi@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>
>> Cc: edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
>> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>>
>> On 30 January 2018 at 14:53, Dandan Bi <dandan.bi@intel.com> wrote:
>>> V2:
>>> Update DxecorePerformanceLib to report the boot performance table
>>> address instead of records contents.
>>>
>>> Updated to convert Pref entry to FPDT record in DXE phase and then
>>> allocate boot performance table to save the record and report
>>> the address of boot performance table to FirmwarePerformanceDxe.
>>>
>>> Cc: Liming Gao <liming.gao@intel.com>
>>> Cc: Star Zeng <star.zeng@intel.com>
>>> Contributed-under: TianoCore Contribution Agreement 1.1
>>> Signed-off-by: Dandan Bi <dandan.bi@intel.com>
>>> ---
>>>  .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
>>>  .../DxeCorePerformanceLib.inf                      |   20 +-
>>>  .../DxeCorePerformanceLibInternal.h                |   17 +-
>>>  3 files changed, 1108 insertions(+), 318 deletions(-)
>>>
>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>> index 7c0e207..c6f8a16 100644
>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>> @@ -8,11 +8,11 @@
>>>    which are consumed by DxePerformanceLib to logging performance data in DXE phase.
>>>
>>>    This library is mainly used by DxeCore to start performance logging to ensure that
>>>    Performance Protocol is installed at the very beginning of DXE phase.
>>>
>>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>>  This program and the accompanying materials
>>>  are licensed and made available under the terms and conditions of the BSD License
>>>  which accompanies this distribution.  The full text of the license may be found at
>>>  http://opensource.org/licenses/bsd-license.php
>>> @@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>>  **/
>>>
>>>
>>>  #include "DxeCorePerformanceLibInternal.h"
>>>
>>> -
>>>  //
>>> -// The data structure to hold global performance data.
>>> +// Data for FPDT performance records.
>>>  //
>>> -GAUGE_DATA_HEADER    *mGaugeData;
>>> +#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
>>> +#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
>>> +#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
>>> +#define FIRMWARE_RECORD_BUFFER  0x10000
>>> +#define CACHE_HANDLE_GUID_COUNT 0x1000
>>> +
>>> +BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
>>> +BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
>>> +  {
>>> +    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
>>> +    sizeof (BOOT_PERFORMANCE_TABLE)
>>> +  },
>>> +  {
>>> +    {
>>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
>>> +      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
>>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
>>> +    },
>>> +    0,  // Reserved
>>> +    //
>>> +    // These values will be updated at runtime.
>>> +    //
>>> +    0,  // ResetEnd
>>> +    0,  // OsLoaderLoadImageStart
>>> +    0,  // OsLoaderStartImageStart
>>> +    0,  // ExitBootServicesEntry
>>> +    0   // ExitBootServicesExit
>>> +  }
>>> +};
>>>
>>> -//
>>> -// The current maximum number of logging entries. If current number of
>>> -// entries exceeds this value, it will re-allocate a larger array and
>>> -// migration the old data to the larger array.
>>> -//
>>> -UINT32               mMaxGaugeRecords;
>>> +typedef struct {
>>> +  EFI_HANDLE    Handle;
>>> +  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>>> +  EFI_GUID      ModuleGuid;
>>> +} HANDLE_GUID_MAP;
>>>
>>> -//
>>> -// The handle to install Performance Protocol instance.
>>> -//
>>> -EFI_HANDLE           mHandle = NULL;
>>> +HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
>>> +UINTN           mCachePairCount = 0;
>>> +
>>> +UINT32  mLoadImageCount       = 0;
>>> +UINT32  mPerformanceLength    = 0;
>>> +UINT32  mMaxPerformanceLength = 0;
>>> +UINT32  mBootRecordSize       = 0;
>>> +UINT32  mBootRecordMaxSize    = 0;
>>> +
>>> +BOOLEAN mFpdtBufferIsReported = FALSE;
>>> +BOOLEAN mLackSpaceIsReported  = FALSE;
>>> +CHAR8   *mPlatformLanguage    = NULL;
>>> +UINT8   *mPerformancePointer  = NULL;
>>> +UINT8   *mBootRecordBuffer    = NULL;
>>> +
>>> +EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
>>>
>>>  //
>>>  // Interfaces for Performance Protocol.
>>>  //
>>>  PERFORMANCE_PROTOCOL mPerformanceInterface = {
>>> @@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
>>>    GetGaugeEx
>>>    };
>>>
>>>  PERFORMANCE_PROPERTY  mPerformanceProperty;
>>>
>>> -//
>>> -//  Gauge record lock to avoid data corruption or even memory overflow
>>> -//
>>> -STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
>>> +/**
>>> +Check whether the Token is a known one which is uesed by core.
>>> +
>>> +@param  Token      Pointer to a Null-terminated ASCII string
>>> +
>>> +@retval TRUE       Is a known one used by core.
>>> +@retval FALSE      Not a known one.
>>> +
>>> +**/
>>> +BOOLEAN
>>> +IsKnownTokens (
>>> +  IN CONST CHAR8  *Token
>>> +  )
>>> +{
>>> +  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, PEI_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DXE_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, BDS_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
>>> +      AsciiStrCmp (Token, PEIM_TOK) == 0) {
>>> +    return TRUE;
>>> +  } else {
>>> +    return FALSE;
>>> +  }
>>> +}
>>> +
>>> +/**
>>> +Check whether the ID is a known one which map to the known Token.
>>> +
>>> +@param  Identifier  32-bit identifier.
>>> +
>>> +@retval TRUE        Is a known one used by core.
>>> +@retval FALSE       Not a known one.
>>> +
>>> +**/
>>> +BOOLEAN
>>> +IsKnownID (
>>> +  IN UINT32       Identifier
>>> +  )
>>> +{
>>> +  if (Identifier == MODULE_START_ID ||
>>> +      Identifier == MODULE_END_ID ||
>>> +      Identifier == MODULE_LOADIMAGE_START_ID ||
>>> +      Identifier == MODULE_LOADIMAGE_END_ID ||
>>> +      Identifier == MODULE_DB_START_ID ||
>>> +      Identifier == MODULE_DB_END_ID ||
>>> +      Identifier == MODULE_DB_SUPPORT_START_ID ||
>>> +      Identifier == MODULE_DB_SUPPORT_END_ID ||
>>> +      Identifier == MODULE_DB_STOP_START_ID ||
>>> +      Identifier == MODULE_DB_STOP_END_ID) {
>>> +    return TRUE;
>>> +  } else {
>>> +    return FALSE;
>>> +  }
>>> +}
>>>
>>>  /**
>>> -  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
>>> +  Allocate EfiReservedMemoryType below 4G memory address.
>>> +
>>> +  This function allocates EfiReservedMemoryType below 4G memory address.
>>> +
>>> +  @param[in]  Size   Size of memory to allocate.
>>> +
>>> +  @return Allocated address for output.
>>> +
>>> +**/
>>> +VOID *
>>> +FpdtAllocateReservedMemoryBelow4G (
>>> +  IN UINTN       Size
>>> +  )
>>> +{
>>> +  UINTN                 Pages;
>>> +  EFI_PHYSICAL_ADDRESS  Address;
>>> +  EFI_STATUS            Status;
>>> +  VOID                  *Buffer;
>>> +
>>> +  Buffer  = NULL;
>>> +  Pages   = EFI_SIZE_TO_PAGES (Size);
>>> +  Address = 0xffffffff;
>>> +
>>> +  Status = gBS->AllocatePages (
>>> +                  AllocateMaxAddress,
>>> +                  EfiReservedMemoryType,
>>> +                  Pages,
>>> +                  &Address
>>> +                  );
>>> +  ASSERT_EFI_ERROR (Status);
>>
>> This code is breaking DEBUG builds on ARM systems that have no memory
>> below 4 GB.
>>
>>> +
>>> +  if (!EFI_ERROR (Status)) {
>>> +    Buffer = (VOID *) (UINTN) Address;
>>> +    ZeroMem (Buffer, Size);
>>> +  }
>>> +
>>> +  return Buffer;
>>> +}
>>> +
>>> +/**
>>> +  Allocate buffer for Boot Performance table.
>>> +
>>> +  @return Status code.
>>> +
>>> +**/
>>> +EFI_STATUS
>>> +AllocateBootPerformanceTable (
>>> +  )
>>> +{
>>> +  EFI_STATUS                    Status;
>>> +  UINTN                         Size;
>>> +  UINT8                         *SmmBootRecordCommBuffer;
>>> +  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
>>> +  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
>>> +  UINTN                         CommSize;
>>> +  UINTN                         BootPerformanceDataSize;
>>> +  UINT8                         *BootPerformanceData;
>>> +  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
>>> +  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
>>> +  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
>>> +  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
>>> +  UINTN                         Index;
>>> +  VOID                          *SmmBootRecordData;
>>> +  UINTN                         SmmBootRecordDataSize;
>>> +  UINTN                         ReservedMemSize;
>>> +
>>> +  //
>>> +  // Collect boot records from SMM drivers.
>>> +  //
>>> +  SmmBootRecordCommBuffer = NULL;
>>> +  SmmCommData             = NULL;
>>> +  SmmBootRecordData       = NULL;
>>> +  SmmBootRecordDataSize   = 0;
>>> +  ReservedMemSize         = 0;
>>> +  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
>>> +  if (!EFI_ERROR (Status)) {
>>> +    //
>>> +    // Initialize communicate buffer
>>> +    // Get the prepared Reserved Memory Range
>>> +    //
>>> +    Status = EfiGetSystemConfigurationTable (
>>> +              &gEdkiiPiSmmCommunicationRegionTableGuid,
>>> +              (VOID **) &SmmCommRegionTable
>>> +              );
>>> +    if (!EFI_ERROR (Status)) {
>>> +      ASSERT (SmmCommRegionTable != NULL);
>>> +      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
>>> +      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
>>> +        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
>>> +          break;
>>> +        }
>>> +        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
>>> +      }
>>> +      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
>>> +      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
>>> +      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
>>> +      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
>>> +
>>> +      //
>>> +      // Check enough reserved memory space
>>> +      //
>>> +      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
>>> +        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
>>> +        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
>>> +        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
>>> +        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
>>> +
>>> +        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
>>> +        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
>>> +        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
>>> +
>>> +        //
>>> +        // Get the size of boot records.
>>> +        //
>>> +        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
>>> +        SmmCommData->BootRecordData = NULL;
>>> +        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>>> +        ASSERT_EFI_ERROR (Status);
>>> +
>>> +        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
>>> +          //
>>> +          // Get all boot records
>>> +          //
>>> +          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
>>> +          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
>>> +          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
>>> +          ASSERT (SmmBootRecordData  != NULL);
>>> +          SmmCommData->BootRecordOffset = 0;
>>> +          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
>>> +          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
>>> +          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
>>> +            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>>> +            ASSERT_EFI_ERROR (Status);
>>> +            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
>>> +            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
>>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
>>> +            } else {
>>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
>>> +            }
>>> +            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
>>> +          }
>>> +        }
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  //
>>> +  // Prepare memory for Boot Performance table.
>>> +  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
>>> +  //
>>> +  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>>> +  if (SmmCommData != NULL) {
>>> +    BootPerformanceDataSize += SmmBootRecordDataSize;
>>> +  }
>>> +
>>> +  //
>>> +  // Try to allocate the same runtime buffer as last time boot.
>>> +  //
>>> +  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
>>> +  Size = sizeof (PerformanceVariable);
>>> +  Status = gRT->GetVariable (
>>> +                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>>> +                  &gEfiFirmwarePerformanceGuid,
>>> +                  NULL,
>>> +                  &Size,
>>> +                  &PerformanceVariable
>>> +                  );
>>> +  if (!EFI_ERROR (Status)) {
>>> +    Status = gBS->AllocatePages (
>>> +                    AllocateAddress,
>>> +                    EfiReservedMemoryType,
>>> +                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
>>> +                    &PerformanceVariable.BootPerformanceTablePointer
>>> +                    );
>>> +    if (!EFI_ERROR (Status)) {
>>> +      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
>>> +    }
>>> +  }
>>> +
>>> +  if (mAcpiBootPerformanceTable == NULL) {
>>> +    //
>>> +    // Fail to allocate at specified address, continue to allocate at any address.
>>> +    //
>>> +    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);
>>
>> Why does this allocation need to live below 4 GB?
>>
>> If there is no good reason, can we please get rid of this?
>> If there is a good reason, can we please document it in the code?
>>
>>> +  }
>>> +  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
>>> +
>>> +  if (mAcpiBootPerformanceTable == NULL) {
>>> +    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>>> +      FreePool (SmmBootRecordData);
>>> +    }
>>> +    return EFI_OUT_OF_RESOURCES;
>>> +  }
>>> +
>>> +  //
>>> +  // Prepare Boot Performance Table.
>>> +  //
>>> +  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
>>> +  //
>>> +  // Fill Basic Boot record to Boot Performance Table.
>>> +  //
>>> +  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
>>> +  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
>>> +  //
>>> +  // Fill Boot records from boot drivers.
>>> +  //
>>> +  if (mPerformancePointer != NULL) {
>>> +    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
>>> +    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
>>> +    BootPerformanceData = BootPerformanceData + mPerformanceLength;
>>> +  }
>>> +  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>>> +    //
>>> +    // Fill Boot records from SMM drivers.
>>> +    //
>>> +    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
>>> +    FreePool (SmmBootRecordData);
>>> +    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
>>> +    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
>>> +  }
>>> +
>>> +  //
>>> +  // Save Boot Performance Table address to Variable for use in S4 resume.
>>> +  //
>>> +  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
>>> +
>>> +  //
>>> +  // Save Runtime Performance Table pointers to Variable.
>>> +  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
>>> +  //
>>> +  gRT->SetVariable (
>>> +        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>>> +        &gEfiFirmwarePerformanceGuid,
>>> +        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
>>> +        sizeof (PerformanceVariable),
>>> +        &PerformanceVariable
>>> +        );
>>> +
>>> +  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
>>> +  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
>>> +  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>>> +
>>> +  return EFI_SUCCESS;
>>> +}
>>> +
>>> +/**
>>> +  Get a human readable module name and module guid for the given image handle.
>>> +  If module name can't be found, "" string will return.
>>> +  If module guid can't be found, Zero Guid will return.
>>> +
>>> +  @param    Handle        Image handle or Controller handle.
>>> +  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
>>> +  @param    BufferSize    Size of the input NameString buffer.
>>> +  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
>>> +
>>> +  @retval EFI_SUCCESS     Successfully get module name and guid.
>>> +  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
>>> +  @retval other value  Module Name can't be got.
>>> +**/
>>> +EFI_STATUS
>>> +GetModuleInfoFromHandle (
>>> +  IN EFI_HANDLE  Handle,
>>> +  OUT CHAR8            *NameString,
>>> +  IN UINTN             BufferSize,
>>> +  OUT EFI_GUID         *ModuleGuid OPTIONAL
>>> +  )
>>> +{
>>> +  EFI_STATUS                  Status;
>>> +  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
>>> +  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
>>> +  CHAR8                       *PdbFileName;
>>> +  EFI_GUID                    *TempGuid;
>>> +  UINTN                       StartIndex;
>>> +  UINTN                       Index;
>>> +  INTN                        Count;
>>> +  BOOLEAN                     ModuleGuidIsGet;
>>> +  UINTN                       StringSize;
>>> +  CHAR16                      *StringPtr;
>>> +  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
>>> +  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
>>> +
>>> +  if (NameString == NULL || BufferSize == 0) {
>>> +    return EFI_INVALID_PARAMETER;
>>> +  }
>>> +  //
>>> +  // Try to get the ModuleGuid and name string form the caached array.
>>> +  //
>>> +  if (mCachePairCount > 0) {
>>> +    for (Count = mCachePairCount -1; Count >= 0; Count--) {
>>> +      if (Handle == mCacheHandleGuidTable[Count].Handle) {
>>> +        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
>>> +        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
>>> +        return EFI_SUCCESS;
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  Status = EFI_INVALID_PARAMETER;
>>> +  LoadedImage     = NULL;
>>> +  ModuleGuidIsGet = FALSE;
>>> +
>>> +  //
>>> +  // Initialize GUID as zero value.
>>> +  //
>>> +  TempGuid    = &gZeroGuid;
>>> +  //
>>> +  // Initialize it as "" string.
>>> +  //
>>> +  NameString[0] = 0;
>>> +
>>> +  if (Handle != NULL) {
>>> +    //
>>> +    // Try Handle as ImageHandle.
>>> +    //
>>> +    Status = gBS->HandleProtocol (
>>> +                  Handle,
>>> +                  &gEfiLoadedImageProtocolGuid,
>>> +                  (VOID**) &LoadedImage
>>> +                  );
>>> +
>>> +    if (EFI_ERROR (Status)) {
>>> +      //
>>> +      // Try Handle as Controller Handle
>>> +      //
>>> +      Status = gBS->OpenProtocol (
>>> +                    Handle,
>>> +                    &gEfiDriverBindingProtocolGuid,
>>> +                    (VOID **) &DriverBinding,
>>> +                    NULL,
>>> +                    NULL,
>>> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
>>> +                    );
>>> +      if (!EFI_ERROR (Status)) {
>>> +        //
>>> +        // Get Image protocol from ImageHandle
>>> +        //
>>> +        Status = gBS->HandleProtocol (
>>> +                      DriverBinding->ImageHandle,
>>> +                      &gEfiLoadedImageProtocolGuid,
>>> +                      (VOID**) &LoadedImage
>>> +                      );
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
>>> +    //
>>> +    // Get Module Guid from DevicePath.
>>> +    //
>>> +    if (LoadedImage->FilePath != NULL &&
>>> +        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
>>> +        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
>>> +       ) {
>>> +      //
>>> +      // Determine GUID associated with module logging performance
>>> +      //
>>> +      ModuleGuidIsGet = TRUE;
>>> +      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
>>> +      TempGuid        = &FvFilePath->FvFileName;
>>> +    }
>>> +
>>> +    //
>>> +    // Method 1 Get Module Name from PDB string.
>>> +    //
>>> +    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
>>> +    if (PdbFileName != NULL && BufferSize > 0) {
>>> +      StartIndex = 0;
>>> +      for (Index = 0; PdbFileName[Index] != 0; Index++) {
>>> +        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
>>> +          StartIndex = Index + 1;
>>> +        }
>>> +      }
>>> +      //
>>> +      // Copy the PDB file name to our temporary string.
>>> +      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
>>> +      //
>>> +      for (Index = 0; Index < BufferSize - 1; Index++) {
>>> +        NameString[Index] = PdbFileName[Index + StartIndex];
>>> +        if (NameString[Index] == 0 || NameString[Index] == '.') {
>>> +          NameString[Index] = 0;
>>> +          break;
>>> +        }
>>> +      }
>>>
>>> -  This internal function searches for the gauge entry in the gauge array.
>>> -  If there is an entry that exactly matches the given keywords
>>> -  and its end time stamp is zero, then the index of that gauge entry is returned;
>>> -  otherwise, the the number of gauge entries in the array is returned.
>>> +      if (Index == BufferSize - 1) {
>>> +        NameString[Index] = 0;
>>> +      }
>>> +      //
>>> +      // Module Name is got.
>>> +      //
>>> +      goto Done;
>>> +    }
>>> +  }
>>>
>>> +  //
>>> +  // Method 2: Get the name string from ComponentName2 protocol
>>> +  //
>>> +  Status = gBS->HandleProtocol (
>>> +                  Handle,
>>> +                  &gEfiComponentName2ProtocolGuid,
>>> +                  (VOID **) &ComponentName2
>>> +                  );
>>> +  if (!EFI_ERROR (Status)) {
>>> +    //
>>> +    // Get the current platform language setting
>>> +    //
>>> +    if (mPlatformLanguage == NULL) {
>>> +      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
>>> +    }
>>> +    if (mPlatformLanguage != NULL) {
>>> +      Status = ComponentName2->GetDriverName (
>>> +                                 ComponentName2,
>>> +                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
>>> +                                 &StringPtr
>>> +                                 );
>>> +      if (!EFI_ERROR (Status)) {
>>> +        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>>> +          NameString[Index] = (CHAR8) StringPtr[Index];
>>> +        }
>>> +        NameString[Index] = 0;
>>> +        //
>>> +        // Module Name is got.
>>> +        //
>>> +        goto Done;
>>> +      }
>>> +    }
>>> +  }
>>> +
>>> +  if (ModuleGuidIsGet) {
>>> +    //
>>> +    // Method 3 Try to get the image's FFS UI section by image GUID
>>> +    //
>>> +    StringPtr  = NULL;
>>> +    StringSize = 0;
>>> +    Status = GetSectionFromAnyFv (
>>> +              TempGuid,
>>> +              EFI_SECTION_USER_INTERFACE,
>>> +              0,
>>> +              (VOID **) &StringPtr,
>>> +              &StringSize
>>> +              );
>>> +
>>> +    if (!EFI_ERROR (Status)) {
>>> +      //
>>> +      // Method 3. Get the name string from FFS UI section
>>> +      //
>>> +      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>>> +        NameString[Index] = (CHAR8) StringPtr[Index];
>>> +      }
>>> +      NameString[Index] = 0;
>>> +      FreePool (StringPtr);
>>> +    }
>>> +  }
>>> +
>>> +Done:
>>> +  //
>>> +  // Copy Module Guid
>>> +  //
>>> +  if (ModuleGuid != NULL) {
>>> +    CopyGuid (ModuleGuid, TempGuid);
>>> +    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
>>> +        // Handle is GUID
>>> +      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
>>> +    }
>>> +  }
>>> +
>>> +  //
>>> +  // Cache the Handle and Guid pairs.
>>> +  //
>>> +  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
>>> +    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
>>> +    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
>>> +    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
>>> +    mCachePairCount ++;
>>> +  }
>>> +
>>> +  return Status;
>>> +}
>>> +
>>> +/**
>>> +  Get the FPDT record info.
>>> +
>>> +  @param  IsStart                 TRUE if the performance log is start log.
>>>    @param  Handle                  Pointer to environment specific context used
>>>                                    to identify the component being measured.
>>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>>                                    that identifies the component being measured.
>>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>>                                    that identifies the module being measured.
>>> -  @param  Identifier              32-bit identifier.
>>> +  @param  RecordInfo              On return, pointer to the info of the record.
>>> +  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
>>> +                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
>>>
>>> -  @retval The index of gauge entry in the array.
>>> +  @retval EFI_SUCCESS          Get record info successfully.
>>> +  @retval EFI_UNSUPPORTED      No matched FPDT record.
>>>
>>>  **/
>>> -UINT32
>>> -InternalSearchForGaugeEntry (
>>> -  IN CONST VOID                 *Handle,  OPTIONAL
>>> -  IN CONST CHAR8                *Token,   OPTIONAL
>>> -  IN CONST CHAR8                *Module,   OPTIONAL
>>> -  IN UINT32                     Identifier
>>> +EFI_STATUS
>>> +GetFpdtRecordInfo (
>>> +  IN BOOLEAN                  IsStart,
>>> +  IN CONST VOID               *Handle,
>>> +  IN CONST CHAR8              *Token,
>>> +  IN CONST CHAR8              *Module,
>>> +  OUT BASIC_RECORD_INFO       *RecordInfo,
>>> +  IN OUT BOOLEAN              *UseModuleName
>>>    )
>>>  {
>>> -  UINT32                    Index;
>>> -  UINT32                    Index2;
>>> -  UINT32                    NumberOfEntries;
>>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>>> +  UINT16              RecordType;
>>> +  UINTN               StringSize;
>>>
>>> -  if (Token == NULL) {
>>> -    Token = "";
>>> -  }
>>> -  if (Module == NULL) {
>>> -    Module = "";
>>> +  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
>>> +
>>> +  //
>>> +  // Token to Type and Id.
>>> +  //
>>> +  if (Token != NULL) {
>>> +    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
>>> +      *UseModuleName = TRUE;
>>> +      RecordType     = GUID_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
>>> +      *UseModuleName = TRUE;
>>> +      RecordType = GUID_QWORD_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
>>> +      *UseModuleName = TRUE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_DB_START_ID;
>>> +        RecordType   = GUID_QWORD_EVENT_TYPE;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_DB_END_ID;
>>> +        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
>>> +      *UseModuleName = TRUE;
>>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>> +        return RETURN_UNSUPPORTED;
>>> +      }
>>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
>>> +      *UseModuleName = TRUE;
>>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>> +         return RETURN_UNSUPPORTED;
>>> +      }
>>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
>>> +      }
>>> +    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
>>> +               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
>>> +               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
>>> +      }
>>> +    } else {                                                          // Pref used in Modules.
>>> +      if (IsStart) {
>>> +        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
>>> +      } else {
>>> +        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
>>> +      }
>>> +    }
>>> +  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
>>> +    if (IsStart) {
>>> +      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
>>> +    } else {
>>> +      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
>>> +    }
>>> +  } else {
>>> +    return EFI_UNSUPPORTED;
>>>    }
>>>
>>> -  NumberOfEntries = mGaugeData->NumberOfEntries;
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> +  //
>>> +  // Get Record size baesed on the record type.
>>> +  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
>>> +  //
>>> +  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>> +    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
>>> +    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
>>> +  } else {
>>> +    switch (RecordType) {
>>> +    case GUID_EVENT_TYPE:
>>> +      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
>>> +      break;
>>>
>>> -  Index2 = 0;
>>> +    case DYNAMIC_STRING_EVENT_TYPE:
>>> +      if (*UseModuleName) {
>>> +        StringSize  = STRING_SIZE;
>>> +      } else if (Token  != NULL) {
>>> +        StringSize  = AsciiStrSize (Token);
>>> +      } else if (Module != NULL) {
>>> +        StringSize  = AsciiStrSize (Module);
>>> +      } else {
>>> +        StringSize  = STRING_SIZE;
>>> +      }
>>> +      if (StringSize > STRING_SIZE) {
>>> +        StringSize   = STRING_SIZE;
>>> +      }
>>> +      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
>>> +      break;
>>>
>>> -  for (Index = 0; Index < NumberOfEntries; Index++) {
>>> -    Index2 = NumberOfEntries - 1 - Index;
>>> -    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
>>> -        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
>>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
>>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
>>> -      Index = Index2;
>>> +    case GUID_QWORD_EVENT_TYPE:
>>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
>>>        break;
>>> +
>>> +    case GUID_QWORD_STRING_EVENT_TYPE:
>>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
>>> +      break;
>>> +
>>> +    default:
>>> +      //
>>> +      // Record is unsupported yet, return EFI_UNSUPPORTED
>>> +      //
>>> +      return EFI_UNSUPPORTED;
>>>      }
>>>    }
>>>
>>> -  return Index;
>>> +  RecordInfo->Type = RecordType;
>>> +  return EFI_SUCCESS;
>>>  }
>>>
>>>  /**
>>> -  Adds a record at the end of the performance measurement log
>>> -  that records the start time of a performance measurement.
>>> -
>>> -  Adds a record to the end of the performance measurement log
>>> -  that contains the Handle, Token, Module and Identifier.
>>> -  The end time of the new record must be set to zero.
>>> -  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>>> -  If TimeStamp is zero, the start time in the record is filled in with the value
>>> -  read from the current time stamp.
>>> +  Add performance log to FPDT boot record table.
>>>
>>> +  @param  IsStart                 TRUE if the performance log is start log.
>>>    @param  Handle                  Pointer to environment specific context used
>>>                                    to identify the component being measured.
>>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>>                                    that identifies the component being measured.
>>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>>                                    that identifies the module being measured.
>>> -  @param  TimeStamp               64-bit time stamp.
>>> +  @param  Ticker                  64-bit time stamp.
>>>    @param  Identifier              32-bit identifier. If the value is 0, the created record
>>>                                    is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>>
>>> -  @retval EFI_SUCCESS             The data was read correctly from the device.
>>> +  @retval EFI_SUCCESS             Add FPDT boot record.
>>>    @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>> +  @retval EFI_UNSUPPORTED         No matched FPDT record.
>>>
>>>  **/
>>>  EFI_STATUS
>>> -EFIAPI
>>> -StartGaugeEx (
>>> +InsertFpdtMeasurement (
>>> +  IN BOOLEAN      IsStart,
>>>    IN CONST VOID   *Handle,  OPTIONAL
>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>> -  IN UINT64       TimeStamp,
>>> +  IN UINT64       Ticker,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>>> -  UINTN                     GaugeDataSize;
>>> -  GAUGE_DATA_HEADER         *NewGaugeData;
>>> -  UINTN                     OldGaugeDataSize;
>>> -  GAUGE_DATA_HEADER         *OldGaugeData;
>>> -  UINT32                    Index;
>>> -  EFI_STATUS                Status;
>>> +  EFI_GUID                     ModuleGuid;
>>> +  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>>> +  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
>>> +  EFI_STATUS                   Status;
>>> +  FPDT_RECORD_PTR              FpdtRecordPtr;
>>> +  BASIC_RECORD_INFO            RecordInfo;
>>> +  UINT64                       TimeStamp;
>>> +  UINTN                        DestMax;
>>> +  UINTN                        StrLength;
>>> +  CONST CHAR8                  *StringPtr;
>>> +  BOOLEAN                      UseModuleName;
>>> +
>>> +  StringPtr     = NULL;
>>> +  UseModuleName = FALSE;
>>> +  ZeroMem (ModuleName, sizeof (ModuleName));
>>> +  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
>>>
>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>> +  //
>>> +  // Get record info (type, size, ProgressID and Module Guid).
>>> +  //
>>> +  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
>>>    if (EFI_ERROR (Status)) {
>>>      return Status;
>>>    }
>>>
>>> -  Index = mGaugeData->NumberOfEntries;
>>> -  if (Index >= mMaxGaugeRecords) {
>>> +  //
>>> +  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
>>> +  // !!! Note: If the Pref is not the known Token used in the core but have same
>>> +  // ID with the core Token, this case will not be supported.
>>> +  // And in currtnt usage mode, for the unkown ID, there is a general rule:
>>> +  // If it is start pref: the lower 4 bits of the ID should be 0.
>>> +  // If it is end pref: the lower 4 bits of the ID should not be 0.
>>> +  // If input ID doesn't follow the rule, we will adjust it.
>>> +  //
>>> +  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>>> +    return EFI_UNSUPPORTED;
>>> +  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>>> +    if (IsStart && ((Identifier & 0x000F) != 0)) {
>>> +      Identifier &= 0xFFF0;
>>> +    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
>>> +      Identifier += 1;
>>> +    }
>>> +    RecordInfo.ProgressID = (UINT16)Identifier;
>>> +  }
>>> +
>>> +  if (mFpdtBufferIsReported) {
>>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
>>> +  } else {
>>> +    //
>>> +    // Check if pre-allocated buffer is full
>>>      //
>>> -    // Try to enlarge the scale of gauge array.
>>> +    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
>>> +      mPerformancePointer = ReallocatePool (
>>> +                              mPerformanceLength,
>>> +                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
>>> +                              mPerformancePointer
>>> +                              );
>>> +
>>> +      if (mPerformancePointer == NULL) {
>>> +        return EFI_OUT_OF_RESOURCES;
>>> +      }
>>> +      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
>>> +    }
>>>      //
>>> -    OldGaugeData      = mGaugeData;
>>> -    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
>>> +    // Covert buffer to FPDT Ptr Union type.
>>> +    //
>>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
>>> +  }
>>> +  FpdtRecordPtr.RecordHeader->Length = 0;
>>>
>>> -    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
>>> +  //
>>> +  // Get the TimeStamp.
>>> +  //
>>> +  if (Ticker == 0) {
>>> +    Ticker    = GetPerformanceCounter ();
>>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>>> +  } else if (Ticker == 1) {
>>> +    TimeStamp = 0;
>>> +  } else {
>>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>>> +  }
>>>
>>> -    NewGaugeData = AllocateZeroPool (GaugeDataSize);
>>> -    if (NewGaugeData == NULL) {
>>> -      EfiReleaseLock (&mPerfRecordLock);
>>> -      return EFI_OUT_OF_RESOURCES;
>>> +  //
>>> +  // Get the ModuleName and ModuleGuid form the handle.
>>> +  //
>>> +  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
>>> +
>>> +  //
>>> +  // Fill in the record information.
>>> +  //
>>> +  switch (RecordInfo.Type) {
>>> +  case GUID_EVENT_TYPE:
>>> +    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
>>> +    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
>>> +    break;
>>> +
>>> +  case DYNAMIC_STRING_EVENT_TYPE:
>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
>>> +
>>> +    if (UseModuleName) {
>>> +      StringPtr     = ModuleName;
>>> +    } else if (Token != NULL) {
>>> +      StringPtr     = Token;
>>> +    } else if (Module != NULL) {
>>> +      StringPtr     = Module;
>>> +    } else if (ModuleName != NULL) {
>>> +      StringPtr     = ModuleName;
>>> +    }
>>> +    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
>>> +      StrLength     = AsciiStrLen (StringPtr);
>>> +      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
>>> +      if (StrLength >= DestMax) {
>>> +        StrLength   = DestMax -1;
>>> +      }
>>> +      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
>>>      }
>>> +    break;
>>> +
>>> +  case GUID_QWORD_EVENT_TYPE:
>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
>>> +    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
>>> +      mLoadImageCount++;
>>> +      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
>>> +    }
>>> +    break;
>>> +
>>> +  case GUID_QWORD_STRING_EVENT_TYPE:
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
>>> +    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
>>> +    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
>>> +    break;
>>> +
>>> +  default:
>>> +    //
>>> +    // Record is not supported in current DXE phase, return EFI_ABORTED
>>> +    //
>>> +    return EFI_UNSUPPORTED;
>>> +  }
>>> +
>>> +  //
>>> +  // Report record one by one after records have been reported together.
>>> +  //
>>> +  if (mFpdtBufferIsReported) {
>>> +      //
>>> +      // Append Boot records to the boot performance table.
>>> +      //
>>> +      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
>>> +        if (!mLackSpaceIsReported) {
>>> +          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
>>> +          mLackSpaceIsReported = TRUE;
>>> +        }
>>> +        return EFI_OUT_OF_RESOURCES;
>>> +      } else {
>>> +        //
>>> +        // Save boot record into BootPerformance table
>>> +        //
>>> +        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
>>> +        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
>>> +        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
>>> +      }
>>> +  } else {
>>> +    //
>>> +    // Update the cached FPDT record buffer.
>>> +    //
>>> +    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
>>> +  }
>>> +
>>> +  return EFI_SUCCESS;
>>> +}
>>> +
>>> +/**
>>> +  Dumps all the PEI performance.
>>> +
>>> +  @param  HobStart      A pointer to a Guid.
>>>
>>> -    mGaugeData = NewGaugeData;
>>> -    mMaxGaugeRecords *= 2;
>>> +  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>>> +  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>>> +  to DXE performance data structures.
>>>
>>> +**/
>>> +VOID
>>> +InternalGetPeiPerformance (
>>> +  VOID  *HobStart
>>> +  )
>>> +{
>>> +  UINT8                                *FirmwarePerformanceHob;
>>> +  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
>>> +  UINT8                                *EventRec;
>>> +  EFI_HOB_GUID_TYPE                    *GuidHob;
>>> +
>>> +  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
>>> +  while (GuidHob != NULL) {
>>> +    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
>>> +    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
>>> +
>>> +    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
>>> +      mPerformancePointer = ReallocatePool (
>>> +                              mPerformanceLength,
>>> +                              mPerformanceLength +
>>> +                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
>>> +                              FIRMWARE_RECORD_BUFFER,
>>> +                              mPerformancePointer
>>> +                              );
>>> +      ASSERT (mPerformancePointer != NULL);
>>> +      mMaxPerformanceLength = mPerformanceLength +
>>> +                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
>>> +                              FIRMWARE_RECORD_BUFFER;
>>> +    }
>>> +
>>> +    EventRec = mPerformancePointer + mPerformanceLength;
>>> +    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
>>>      //
>>> -    // Initialize new data array and migrate old data one.
>>> +    // Update the used buffer size.
>>>      //
>>> -    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
>>> +    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
>>> +    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
>>>
>>> -    FreePool (OldGaugeData);
>>> +    //
>>> +    // Get next performance guid hob
>>> +    //
>>> +    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
>>>    }
>>> +}
>>>
>>> -  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
>>> +/**
>>> +  Report Boot Perforamnce table address as report status code.
>>>
>>> -  if (Token != NULL) {
>>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
>>> -  }
>>> -  if (Module != NULL) {
>>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
>>> +  @param  Event    The event of notify protocol.
>>> +  @param  Context  Notify event context.
>>> +
>>> +**/
>>> +VOID
>>> +EFIAPI
>>> +ReportFpdtRecordBuffer (
>>> +  IN EFI_EVENT     Event,
>>> +  IN VOID          *Context
>>> +  )
>>> +{
>>> +  EFI_STATUS      Status;
>>> +  UINT64          BPDTAddr;
>>> +
>>> +  if (!mFpdtBufferIsReported) {
>>> +    Status = AllocateBootPerformanceTable ();
>>> +    if (!EFI_ERROR(Status)) {
>>> +      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
>>> +      REPORT_STATUS_CODE_EX (
>>> +          EFI_PROGRESS_CODE,
>>> +          EFI_SOFTWARE_DXE_BS_DRIVER,
>>> +          0,
>>> +          NULL,
>>> +          &gEfiFirmwarePerformanceGuid,
>>> +          &BPDTAddr,
>>> +          sizeof (UINT64)
>>> +          );
>>> +    }
>>> +    //
>>> +    // Free Cached FPDT record Buffer
>>> +    //
>>> +    if (mPerformancePointer != NULL) {
>>> +      FreePool (mPerformancePointer);
>>> +      mPerformancePointer   = NULL;
>>> +    }
>>> +    mPerformanceLength    = 0;
>>> +    mMaxPerformanceLength = 0;
>>> +    //
>>> +    // Set FPDT report state to TRUE.
>>> +    //
>>> +    mFpdtBufferIsReported = TRUE;
>>>    }
>>> +}
>>>
>>> -  GaugeEntryExArray[Index].EndTimeStamp = 0;
>>> -  GaugeEntryExArray[Index].Identifier = Identifier;
>>> +/**
>>> +  Adds a record at the end of the performance measurement log
>>> +  that records the start time of a performance measurement.
>>>
>>> -  if (TimeStamp == 0) {
>>> -    TimeStamp = GetPerformanceCounter ();
>>> -  }
>>> -  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
>>> +  Adds a record to the end of the performance measurement log
>>> +  that contains the Handle, Token, Module and Identifier.
>>> +  The end time of the new record must be set to zero.
>>> +  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>>> +  If TimeStamp is zero, the start time in the record is filled in with the value
>>> +  read from the current time stamp.
>>>
>>> -  mGaugeData->NumberOfEntries++;
>>> +  @param  Handle                  Pointer to environment specific context used
>>> +                                  to identify the component being measured.
>>> +  @param  Token                   Pointer to a Null-terminated ASCII string
>>> +                                  that identifies the component being measured.
>>> +  @param  Module                  Pointer to a Null-terminated ASCII string
>>> +                                  that identifies the module being measured.
>>> +  @param  TimeStamp               64-bit time stamp.
>>> +  @param  Identifier              32-bit identifier. If the value is 0, the created record
>>> +                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>>
>>> -  EfiReleaseLock (&mPerfRecordLock);
>>> +  @retval EFI_SUCCESS             The data was read correctly from the device.
>>> +  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>>
>>> -  return EFI_SUCCESS;
>>> +**/
>>> +EFI_STATUS
>>> +EFIAPI
>>> +StartGaugeEx (
>>> +  IN CONST VOID   *Handle,  OPTIONAL
>>> +  IN CONST CHAR8  *Token,   OPTIONAL
>>> +  IN CONST CHAR8  *Module,  OPTIONAL
>>> +  IN UINT64       TimeStamp,
>>> +  IN UINT32       Identifier
>>> +  )
>>> +{
>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Searches the performance measurement log from the beginning of the log
>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>>
>>>    Searches the performance measurement log from the beginning of the log
>>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>>    If the record can not be found then return EFI_NOT_FOUND.
>>>    If the record is found and TimeStamp is not zero,
>>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>>    is filled in with the current time stamp value.
>>> @@ -260,89 +1188,19 @@ EndGaugeEx (
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>>> -  UINT32              Index;
>>> -  EFI_STATUS          Status;
>>> -
>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>> -  if (EFI_ERROR (Status)) {
>>> -    return Status;
>>> -  }
>>> -
>>> -  if (TimeStamp == 0) {
>>> -    TimeStamp = GetPerformanceCounter ();
>>> -  }
>>> -
>>> -  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
>>> -  if (Index >= mGaugeData->NumberOfEntries) {
>>> -    EfiReleaseLock (&mPerfRecordLock);
>>> -    return EFI_NOT_FOUND;
>>> -  }
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
>>> -
>>> -  EfiReleaseLock (&mPerfRecordLock);
>>> -  return EFI_SUCCESS;
>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Retrieves a previously logged performance measurement.
>>>    It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>>    and then assign the Identifier with 0.
>>>
>>> -  Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>> -  If it stands for a valid entry, then EFI_SUCCESS is returned and
>>> -  GaugeDataEntryEx stores the pointer to that entry.
>>> -
>>> -  This internal function is added to avoid releasing lock before each return statement.
>>> -
>>> -  @param  LogEntryKey             The key for the previous performance measurement log entry.
>>> -                                  If 0, then the first performance measurement log entry is retrieved.
>>> -  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
>>> -                                  if the retrieval is successful.
>>> -
>>> -  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
>>> -  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
>>> -  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
>>> -  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
>>> -
>>> -**/
>>> -EFI_STATUS
>>> -EFIAPI
>>> -InternalGetGaugeEx (
>>> -  IN  UINTN                 LogEntryKey,
>>> -  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>> -  )
>>> -{
>>> -  UINTN               NumberOfEntries;
>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>>> -
>>> -  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
>>> -  if (LogEntryKey > NumberOfEntries) {
>>> -    return EFI_INVALID_PARAMETER;
>>> -  }
>>> -  if (LogEntryKey == NumberOfEntries) {
>>> -    return EFI_NOT_FOUND;
>>> -  }
>>> -
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -
>>> -  if (GaugeDataEntryEx == NULL) {
>>> -    return EFI_INVALID_PARAMETER;
>>> -  }
>>> -  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
>>> -
>>> -  return EFI_SUCCESS;
>>> -}
>>> -
>>> -/**
>>> -  Retrieves a previously logged performance measurement.
>>> -  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>> -  and then assign the Identifier with 0.
>>> +    !!! Not support!!!
>>>
>>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>>    GaugeDataEntryEx stores the pointer to that entry.
>>>
>>> @@ -362,22 +1220,11 @@ EFIAPI
>>>  GetGaugeEx (
>>>    IN  UINTN                 LogEntryKey,
>>>    OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>>    )
>>>  {
>>> -  EFI_STATUS                Status;
>>> -
>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>> -  if (EFI_ERROR (Status)) {
>>> -    return Status;
>>> -  }
>>> -
>>> -  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
>>> -
>>> -  EfiReleaseLock (&mPerfRecordLock);
>>> -
>>> -  return Status;
>>> +  return EFI_UNSUPPORTED;
>>>  }
>>>
>>>  /**
>>>    Adds a record at the end of the performance measurement log
>>>    that records the start time of a performance measurement.
>>> @@ -452,10 +1299,12 @@ EndGauge (
>>>  /**
>>>    Retrieves a previously logged performance measurement.
>>>    It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
>>>    and then eliminate the Identifier.
>>>
>>> +    !!! Not support!!!
>>> +
>>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>>    GaugeDataEntry stores the pointer to that entry.
>>>
>>>    @param  LogEntryKey             The key for the previous performance measurement log entry.
>>> @@ -474,81 +1323,13 @@ EFIAPI
>>>  GetGauge (
>>>    IN  UINTN               LogEntryKey,
>>>    OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
>>>    )
>>>  {
>>> -  EFI_STATUS          Status;
>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
>>> -
>>> -  GaugeEntryEx = NULL;
>>> -
>>> -  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
>>> -  if (EFI_ERROR (Status)) {
>>> -    return Status;
>>> -  }
>>> -
>>> -  if (GaugeDataEntry == NULL) {
>>> -    return EFI_INVALID_PARAMETER;
>>> -  }
>>> -
>>> -  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
>>> -
>>> -  return EFI_SUCCESS;
>>> +  return EFI_UNSUPPORTED;
>>>  }
>>>
>>> -/**
>>> -  Dumps all the PEI performance log to DXE performance gauge array.
>>> -
>>> -  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>>> -  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>>> -  to DXE performance data structures.
>>> -
>>> -**/
>>> -VOID
>>> -InternalGetPeiPerformance (
>>> -  VOID
>>> -  )
>>> -{
>>> -  EFI_HOB_GUID_TYPE                 *GuidHob;
>>> -  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
>>> -  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
>>> -  UINT32                            *LogIdArray;
>>> -  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
>>> -  UINT32                            Index;
>>> -  UINT32                            NumberOfEntries;
>>> -
>>> -  NumberOfEntries = 0;
>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>> -
>>> -  //
>>> -  // Dump PEI Log Entries to DXE Guage Data structure.
>>> -  //
>>> -  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
>>> -  if (GuidHob != NULL) {
>>> -    LogHob          = GET_GUID_HOB_DATA (GuidHob);
>>> -    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
>>> -
>>> -    NumberOfEntries = LogHob->NumberOfEntries;
>>> -    for (Index = 0; Index < NumberOfEntries; Index++) {
>>> -      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
>>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
>>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
>>> -      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
>>> -      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
>>> -      GaugeEntryExArray[Index].Identifier     = 0;
>>> -    }
>>> -
>>> -    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
>>> -    if (GuidHob != NULL) {
>>> -      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
>>> -      for (Index = 0; Index < NumberOfEntries; Index++) {
>>> -        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
>>> -      }
>>> -    }
>>> -  }
>>> -  mGaugeData->NumberOfEntries = NumberOfEntries;
>>> -}
>>>
>>>  /**
>>>    The constructor function initializes Performance infrastructure for DXE phase.
>>>
>>>    The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
>>> @@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
>>>    IN EFI_HANDLE        ImageHandle,
>>>    IN EFI_SYSTEM_TABLE  *SystemTable
>>>    )
>>>  {
>>>    EFI_STATUS                Status;
>>> +  EFI_HANDLE                Handle;
>>> +  EFI_EVENT                 ReadyToBootEvent;
>>>    PERFORMANCE_PROPERTY      *PerformanceProperty;
>>>
>>> -
>>>    if (!PerformanceMeasurementEnabled ()) {
>>>      //
>>>      // Do not initialize performance infrastructure if not required.
>>>      //
>>>      return EFI_SUCCESS;
>>>    }
>>> +
>>> +  //
>>> +  // Dump normal PEI performance records
>>> +  //
>>> +  InternalGetPeiPerformance (GetHobList());
>>> +
>>>    //
>>> -  // Install the protocol interfaces.
>>> +  // Install the protocol interfaces for DXE performance library instance.
>>>    //
>>> +  Handle = NULL;
>>>    Status = gBS->InstallMultipleProtocolInterfaces (
>>> -                  &mHandle,
>>> +                  &Handle,
>>>                    &gPerformanceProtocolGuid,
>>>                    &mPerformanceInterface,
>>>                    &gPerformanceExProtocolGuid,
>>>                    &mPerformanceExInterface,
>>>                    NULL
>>>                    );
>>>    ASSERT_EFI_ERROR (Status);
>>>
>>> -  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
>>> -                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
>>> -                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
>>> -
>>> -  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
>>> -  ASSERT (mGaugeData != NULL);
>>> +  //
>>> +  // Register ReadyToBoot event to report StatusCode data
>>> +  //
>>> +  Status = gBS->CreateEventEx (
>>> +                  EVT_NOTIFY_SIGNAL,
>>> +                  TPL_CALLBACK,
>>> +                  ReportFpdtRecordBuffer,
>>> +                  NULL,
>>> +                  &gEfiEventReadyToBootGuid,
>>> +                  &ReadyToBootEvent
>>> +                  );
>>>
>>> -  InternalGetPeiPerformance ();
>>> +  ASSERT_EFI_ERROR (Status);
>>>
>>>    Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
>>>    if (EFI_ERROR (Status)) {
>>>      //
>>>      // Install configuration table for performance property.
>>> @@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Searches the performance measurement log from the beginning of the log
>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>>
>>>    Searches the performance measurement log from the beginning of the log
>>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>>    If the record can not be found then return RETURN_NOT_FOUND.
>>>    If the record is found and TimeStamp is not zero,
>>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>>    is filled in with the current time stamp value.
>>> @@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp,
>>>    IN UINT32       Identifier
>>>    )
>>>  {
>>> -  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>>  }
>>>
>>>  /**
>>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>>    It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
>>>    and then assign the Identifier with 0.
>>>
>>> +    !!! Not support!!!
>>> +
>>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>>> @@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
>>>                                    being measured.
>>>    @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
>>>                                    was started.
>>>    @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
>>>                                    was ended.
>>> -  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
>>> +  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
>>> +                                  was ended.
>>>
>>>    @return The key for the next performance log entry (in general case).
>>>
>>>  **/
>>>  UINTN
>>>  EFIAPI
>>>  GetPerformanceMeasurementEx (
>>> -  IN  UINTN       LogEntryKey,
>>> +  IN  UINTN       LogEntryKey,
>>>    OUT CONST VOID  **Handle,
>>>    OUT CONST CHAR8 **Token,
>>>    OUT CONST CHAR8 **Module,
>>>    OUT UINT64      *StartTimeStamp,
>>>    OUT UINT64      *EndTimeStamp,
>>>    OUT UINT32      *Identifier
>>>    )
>>>  {
>>> -  EFI_STATUS           Status;
>>> -  GAUGE_DATA_ENTRY_EX  *GaugeData;
>>> -
>>> -  GaugeData = NULL;
>>> -
>>> -  ASSERT (Handle != NULL);
>>> -  ASSERT (Token != NULL);
>>> -  ASSERT (Module != NULL);
>>> -  ASSERT (StartTimeStamp != NULL);
>>> -  ASSERT (EndTimeStamp != NULL);
>>> -  ASSERT (Identifier != NULL);
>>> -
>>> -  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
>>> -
>>> -  //
>>> -  // Make sure that LogEntryKey is a valid log entry key,
>>> -  //
>>> -  ASSERT (Status != EFI_INVALID_PARAMETER);
>>> -
>>> -  if (EFI_ERROR (Status)) {
>>> -    //
>>> -    // The LogEntryKey is the last entry (equals to the total entry number).
>>> -    //
>>> -    return 0;
>>> -  }
>>> -
>>> -  ASSERT (GaugeData != NULL);
>>> -
>>> -  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
>>> -  *Token          = GaugeData->Token;
>>> -  *Module         = GaugeData->Module;
>>> -  *StartTimeStamp = GaugeData->StartTimeStamp;
>>> -  *EndTimeStamp   = GaugeData->EndTimeStamp;
>>> -  *Identifier     = GaugeData->Identifier;
>>> -
>>> -  return LogEntryKey;
>>> +  return 0;
>>>  }
>>>
>>>  /**
>>>    Adds a record at the end of the performance measurement log
>>>    that records the start time of a performance measurement.
>>> @@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp
>>>    )
>>>  {
>>> -  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
>>>  }
>>>
>>>  /**
>>>    Searches the performance measurement log from the beginning of the log
>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>> @@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>    IN UINT64       TimeStamp
>>>    )
>>>  {
>>> -  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
>>>  }
>>>
>>>  /**
>>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>>    It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
>>>    and then eliminate the Identifier.
>>>
>>> +  !!! Not support!!!
>>> +
>>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>>> @@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
>>>    OUT CONST CHAR8 **Module,
>>>    OUT UINT64      *StartTimeStamp,
>>>    OUT UINT64      *EndTimeStamp
>>>    )
>>>  {
>>> -  UINT32 Identifier;
>>> -  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
>>> +  return 0;
>>>  }
>>>
>>>  /**
>>>    Returns TRUE if the performance measurement macros are enabled.
>>>
>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>> index 5b89ce2..71c181f 100644
>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>> @@ -7,11 +7,11 @@
>>>  #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
>>>  #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
>>>  #  This library is mainly used by DxeCore to start performance logging to ensure that
>>>  #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
>>>  #
>>> -#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>> +#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>  # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>>  #  This program and the accompanying materials
>>>  #  are licensed and made available under the terms and conditions of the BSD License
>>>  #  which accompanies this distribution.  The full text of the license may be found at
>>>  #  http://opensource.org/licenses/bsd-license.php
>>> @@ -48,27 +48,39 @@
>>>
>>>
>>>  [LibraryClasses]
>>>    MemoryAllocationLib
>>>    UefiBootServicesTableLib
>>> +  UefiRuntimeServicesTableLib
>>>    PcdLib
>>>    TimerLib
>>>    BaseMemoryLib
>>>    BaseLib
>>>    HobLib
>>>    DebugLib
>>>    UefiLib
>>> +  ReportStatusCodeLib
>>> +  DxeServicesLib
>>> +  PeCoffGetEntryPointLib
>>> +
>>> +[Protocols]
>>> +  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
>>>
>>>
>>>  [Guids]
>>>    ## SOMETIMES_CONSUMES   ## HOB
>>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>>    ## PRODUCES             ## SystemTable
>>>    gPerformanceProtocolGuid
>>>    ## SOMETIMES_CONSUMES   ## HOB
>>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>>    gPerformanceExProtocolGuid
>>> +  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
>>> +  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
>>> +  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
>>> +  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
>>> +  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
>>>
>>>  [Pcd]
>>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
>>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
>>> -  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
>>> +  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
>>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
>>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>> index f1540d8..7e79675 100644
>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>> @@ -2,11 +2,11 @@
>>>    Master header files for DxeCorePerformanceLib instance.
>>>
>>>    This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
>>>    library instance at its constructor.
>>>
>>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>  This program and the accompanying materials
>>>  are licensed and made available under the terms and conditions of the BSD License
>>>  which accompanies this distribution.  The full text of the license may be found at
>>>  http://opensource.org/licenses/bsd-license.php
>>>
>>> @@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>>
>>>
>>>  #include <PiDxe.h>
>>>
>>>  #include <Guid/Performance.h>
>>> +#include <Guid/ExtendedFirmwarePerformance.h>
>>> +#include <Guid/ZeroGuid.h>
>>> +#include <Guid/EventGroup.h>
>>> +#include <Guid/FirmwarePerformance.h>
>>> +#include <Guid/PiSmmCommunicationRegionTable.h>
>>> +
>>> +#include <Protocol/DriverBinding.h>
>>> +#include <Protocol/LoadedImage.h>
>>> +#include <Protocol/ComponentName2.h>
>>> +#include <Protocol/DevicePathToText.h>
>>> +#include <Protocol/SmmCommunication.h>
>>>
>>>  #include <Library/PerformanceLib.h>
>>>  #include <Library/DebugLib.h>
>>>  #include <Library/HobLib.h>
>>>  #include <Library/BaseLib.h>
>>>  #include <Library/BaseMemoryLib.h>
>>>  #include <Library/TimerLib.h>
>>>  #include <Library/PcdLib.h>
>>>  #include <Library/UefiBootServicesTableLib.h>
>>> +#include <Library/UefiRuntimeServicesTableLib.h>
>>>  #include <Library/MemoryAllocationLib.h>
>>>  #include <Library/UefiLib.h>
>>> +#include <Library/ReportStatusCodeLib.h>
>>> +#include <Library/DxeServicesLib.h>
>>> +#include <Library/PeCoffGetEntryPointLib.h>
>>>
>>>  //
>>>  // Interface declarations for PerformanceEx Protocol.
>>>  //
>>>  /**
>>> --
>>> 1.9.5.msysgit.1
>>>
>>> _______________________________________________
>>> edk2-devel mailing list
>>> edk2-devel@lists.01.org
>>> https://lists.01.org/mailman/listinfo/edk2-devel
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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Laszlo Ersek 6 years, 7 months ago
Hi Star,

On 05/22/18 11:38, Zeng, Star wrote:
> It comes to an old question: how to know PEI is 32bit/64bit? But not DXE is 32bit/64bit.

we've discussed this question in the past (as you remember :) ) and
people suggested both HOBs and PCDs to expose the "PEI phase max
address" to DXE. All of those ideas were rejected -- I'm unsure why, to
this day --, but assuming people who opposed those ideas are going to
oppose them again, I think Ard's idea is good, about introducing
dedicated MemoryAllocationLib interfaces, for PEI-targeted memory
allocation.

Once drivers adopt these new interfaces, platforms can at least fork the
MemoryAllocationLib instance(s) they need, and customize the PEI phase
max address one way or another.

Thanks,
Laszlo

> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org] 
> Sent: Tuesday, May 22, 2018 5:03 PM
> To: Zeng, Star <star.zeng@intel.com>
> Cc: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
> 
> pd On 22 May 2018 at 10:58, Zeng, Star <star.zeng@intel.com> wrote:
>> How about the code to try allocating <4G memory, then try allocating any memory if failed to allocate <4G memory?
>>
>> For example, the code snippet in SmbiosDxe.c.
>>
>>     PhysicalAddress = 0xffffffff;
>>     Status = gBS->AllocatePages (
>>                     AllocateMaxAddress,
>>                     EfiRuntimeServicesData,
>>                     EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>>                     &PhysicalAddress
>>                     );
>>     if (EFI_ERROR (Status)) {
>>       DEBUG ((EFI_D_ERROR, "SmbiosCreateTable () could not allocate EntryPointStructure < 4GB\n"));
>>       Status = gBS->AllocatePages (
>>                       AllocateAnyPages,
>>                       EfiRuntimeServicesData,
>>                       EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>>                       &PhysicalAddress
>>                       );
>>      if (EFI_ERROR (Status)) {
>>         return EFI_OUT_OF_RESOURCES;
>>       }
>>     }
>>
> 
> Yes, that should do the trick.
> 
> But perhaps we should add something like
> 
> AllocatePeiAccessiblePages()
> 
> to MemoryAllocationLib, which just uses AllocateMaxAddress or
> AllocateAnyPages depending on whether MDE_CPU_X64 is #defined.
> 

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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Zeng, Star 6 years, 7 months ago
I could not recall the whole background.

Let us separate the problem into two parts.

1. For this special case in DxeCorePerformanceLib, we at least have approach (although just for short term).
2. For the general problem about whether introducing new interface (PCD and API, seemingly it needs to be in MdePkg), it depends on whether we agree to add new interface and seems need more time to discuss. If yes, then library/driver could be updated to consume it.

If we agree to add new interface, as current instances of MemoryAllocationLib are very nature by phases (PEI, DXE (Uefi/DxeCore), SMM, etc), but the new interface is just needed in DXE (Uefi/DxeCore) instances, how about adding it in UefiLib?


Thanks,
Star
-----Original Message-----
From: Laszlo Ersek [mailto:lersek@redhat.com] 
Sent: Tuesday, May 22, 2018 6:00 PM
To: Zeng, Star <star.zeng@intel.com>; Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Bi, Dandan <dandan.bi@intel.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase

Hi Star,

On 05/22/18 11:38, Zeng, Star wrote:
> It comes to an old question: how to know PEI is 32bit/64bit? But not DXE is 32bit/64bit.

we've discussed this question in the past (as you remember :) ) and people suggested both HOBs and PCDs to expose the "PEI phase max address" to DXE. All of those ideas were rejected -- I'm unsure why, to this day --, but assuming people who opposed those ideas are going to oppose them again, I think Ard's idea is good, about introducing dedicated MemoryAllocationLib interfaces, for PEI-targeted memory allocation.

Once drivers adopt these new interfaces, platforms can at least fork the MemoryAllocationLib instance(s) they need, and customize the PEI phase max address one way or another.

Thanks,
Laszlo

> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
> Sent: Tuesday, May 22, 2018 5:03 PM
> To: Zeng, Star <star.zeng@intel.com>
> Cc: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek 
> <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D 
> <michael.d.kinney@intel.com>; Leif Lindholm 
> <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Gao, Liming 
> <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
> Subject: Re: [edk2] [PATCH v2 3/8] 
> MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
> 
> pd On 22 May 2018 at 10:58, Zeng, Star <star.zeng@intel.com> wrote:
>> How about the code to try allocating <4G memory, then try allocating any memory if failed to allocate <4G memory?
>>
>> For example, the code snippet in SmbiosDxe.c.
>>
>>     PhysicalAddress = 0xffffffff;
>>     Status = gBS->AllocatePages (
>>                     AllocateMaxAddress,
>>                     EfiRuntimeServicesData,
>>                     EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>>                     &PhysicalAddress
>>                     );
>>     if (EFI_ERROR (Status)) {
>>       DEBUG ((EFI_D_ERROR, "SmbiosCreateTable () could not allocate EntryPointStructure < 4GB\n"));
>>       Status = gBS->AllocatePages (
>>                       AllocateAnyPages,
>>                       EfiRuntimeServicesData,
>>                       EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>>                       &PhysicalAddress
>>                       );
>>      if (EFI_ERROR (Status)) {
>>         return EFI_OUT_OF_RESOURCES;
>>       }
>>     }
>>
> 
> Yes, that should do the trick.
> 
> But perhaps we should add something like
> 
> AllocatePeiAccessiblePages()
> 
> to MemoryAllocationLib, which just uses AllocateMaxAddress or 
> AllocateAnyPages depending on whether MDE_CPU_X64 is #defined.
> 

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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Ard Biesheuvel 6 years, 7 months ago
On 22 May 2018 at 12:38, Zeng, Star <star.zeng@intel.com> wrote:
> I could not recall the whole background.
>
> Let us separate the problem into two parts.
>
> 1. For this special case in DxeCorePerformanceLib, we at least have approach (although just for short term).

I disagree. The approach involves attempting to allocate below 4 GB,
and fall back to allocating elsewhere if that fails.

On X64, the fallback should not exist. If the first allocation fails,
you will end up with an allocation that PEI may not be able to access,
and you will not get any error or warning about this condition.

On other architectures, allocating below 4 GB unnecessarily may be
wasteful, since it uses up 32-bit addressable that we may prefer to
use for DMA, for instance, given that 32-bit DMA is more efficient
even on PCIe systems.

So even if it makes the error go away, I think it is not a solution at all.

> 2. For the general problem about whether introducing new interface (PCD and API, seemingly it needs to be in MdePkg), it depends on whether we agree to add new interface and seems need more time to discuss. If yes, then library/driver could be updated to consume it.
>
> If we agree to add new interface, as current instances of MemoryAllocationLib are very nature by phases (PEI, DXE (Uefi/DxeCore), SMM, etc), but the new interface is just needed in DXE (Uefi/DxeCore) instances, how about adding it in UefiLib?
>

That is a good point, actually. I will look into this.
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Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
Posted by Ard Biesheuvel 6 years, 7 months ago
On 22 May 2018 at 11:38, Zeng, Star <star.zeng@intel.com> wrote:
> It comes to an old question: how to know PEI is 32bit/64bit? But not DXE is 32bit/64bit.
>

True. But the current approach is to always assume that PEI is 32-bit,
on every architecture. We can improve upon that by only making this
assumption on X64 builds of DXE, and do so in an abstracted manner
rather than putting the hardcoded limit everywhere in the code.



> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
> Sent: Tuesday, May 22, 2018 5:03 PM
> To: Zeng, Star <star.zeng@intel.com>
> Cc: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>
> pd On 22 May 2018 at 10:58, Zeng, Star <star.zeng@intel.com> wrote:
>> How about the code to try allocating <4G memory, then try allocating any memory if failed to allocate <4G memory?
>>
>> For example, the code snippet in SmbiosDxe.c.
>>
>>     PhysicalAddress = 0xffffffff;
>>     Status = gBS->AllocatePages (
>>                     AllocateMaxAddress,
>>                     EfiRuntimeServicesData,
>>                     EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>>                     &PhysicalAddress
>>                     );
>>     if (EFI_ERROR (Status)) {
>>       DEBUG ((EFI_D_ERROR, "SmbiosCreateTable () could not allocate EntryPointStructure < 4GB\n"));
>>       Status = gBS->AllocatePages (
>>                       AllocateAnyPages,
>>                       EfiRuntimeServicesData,
>>                       EFI_SIZE_TO_PAGES (sizeof (SMBIOS_TABLE_ENTRY_POINT)),
>>                       &PhysicalAddress
>>                       );
>>      if (EFI_ERROR (Status)) {
>>         return EFI_OUT_OF_RESOURCES;
>>       }
>>     }
>>
>
> Yes, that should do the trick.
>
> But perhaps we should add something like
>
> AllocatePeiAccessiblePages()
>
> to MemoryAllocationLib, which just uses AllocateMaxAddress or
> AllocateAnyPages depending on whether MDE_CPU_X64 is #defined.
>
> --
> Ard.
>
>> -----Original Message-----
>> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
>> Sent: Tuesday, May 22, 2018 4:52 PM
>> To: Bi, Dandan <dandan.bi@intel.com>; Laszlo Ersek <lersek@redhat.com>; Andrew Fish <afish@apple.com>; Kinney, Michael D <michael.d.kinney@intel.com>
>> Cc: Leif Lindholm <leif.lindholm@linaro.org>; edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
>> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>>
>> (+ Laszlo, Andrew, Mike)
>>
>> On 22 May 2018 at 02:33, Bi, Dandan <dandan.bi@intel.com> wrote:
>>> Sorry for the delayed response.
>>>
>>> The allocated  performance table ( below 4G ) is to save the boot performance data in normal boot and S3 phase.
>>> PEIM FirmwarePerformancePei will get the address of the performance table and update the performance date of S3 phase to the table.
>>> The address need to be handled in PEI phase(32bit), that's the main reason why we allocate it below 4G.
>>>
>>
>> The 32-bit PEI + 64-bit DXE combo is specific to X64. You have added
>> code to a generic library that ASSERT()s if allocating memory below 4
>> GB fails, breaking non-PC architectures.
>>
>> So please, fix this. Or at least suggest a way around it so that other
>> architectures can keep using this library.
>>
>> This is another consequence of our failure to model the special 32-bit
>> PEI/64-bit DXE combination using proper PI interfaces, resulting in
>> these kinds of breakages and open coded 4 GB allocations all
>> throughout the code. Can we please work on getting this fixed?
>>
>>
>>> -----Original Message-----
>>> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
>>> Sent: Wednesday, May 2, 2018 12:27 AM
>>> To: Bi, Dandan <dandan.bi@intel.com>; Leif Lindholm <leif.lindholm@linaro.org>
>>> Cc: edk2-devel@lists.01.org; Zeng, Star <star.zeng@intel.com>; Gao, Liming <liming.gao@intel.com>; Matt Sealey <neko@bakuhatsu.net>
>>> Subject: Re: [edk2] [PATCH v2 3/8] MdeModulePkg/DxeCorePerformanceLib:Track FPDT record in DXE phase
>>>
>>> On 30 January 2018 at 14:53, Dandan Bi <dandan.bi@intel.com> wrote:
>>>> V2:
>>>> Update DxecorePerformanceLib to report the boot performance table
>>>> address instead of records contents.
>>>>
>>>> Updated to convert Pref entry to FPDT record in DXE phase and then
>>>> allocate boot performance table to save the record and report
>>>> the address of boot performance table to FirmwarePerformanceDxe.
>>>>
>>>> Cc: Liming Gao <liming.gao@intel.com>
>>>> Cc: Star Zeng <star.zeng@intel.com>
>>>> Contributed-under: TianoCore Contribution Agreement 1.1
>>>> Signed-off-by: Dandan Bi <dandan.bi@intel.com>
>>>> ---
>>>>  .../DxeCorePerformanceLib/DxeCorePerformanceLib.c  | 1389 +++++++++++++++-----
>>>>  .../DxeCorePerformanceLib.inf                      |   20 +-
>>>>  .../DxeCorePerformanceLibInternal.h                |   17 +-
>>>>  3 files changed, 1108 insertions(+), 318 deletions(-)
>>>>
>>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>>> index 7c0e207..c6f8a16 100644
>>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.c
>>>> @@ -8,11 +8,11 @@
>>>>    which are consumed by DxePerformanceLib to logging performance data in DXE phase.
>>>>
>>>>    This library is mainly used by DxeCore to start performance logging to ensure that
>>>>    Performance Protocol is installed at the very beginning of DXE phase.
>>>>
>>>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>>  (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>>>  This program and the accompanying materials
>>>>  are licensed and made available under the terms and conditions of the BSD License
>>>>  which accompanies this distribution.  The full text of the license may be found at
>>>>  http://opensource.org/licenses/bsd-license.php
>>>> @@ -23,27 +23,65 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>>>  **/
>>>>
>>>>
>>>>  #include "DxeCorePerformanceLibInternal.h"
>>>>
>>>> -
>>>>  //
>>>> -// The data structure to hold global performance data.
>>>> +// Data for FPDT performance records.
>>>>  //
>>>> -GAUGE_DATA_HEADER    *mGaugeData;
>>>> +#define SMM_BOOT_RECORD_COMM_SIZE (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data) + sizeof(SMM_BOOT_RECORD_COMMUNICATE))
>>>> +#define STRING_SIZE             (EDKII_STRING_EVENT_RECORD_NAME_LENGTH * sizeof (CHAR8))
>>>> +#define MAX_RECORD_SIZE         (sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE)
>>>> +#define FIRMWARE_RECORD_BUFFER  0x10000
>>>> +#define CACHE_HANDLE_GUID_COUNT 0x1000
>>>> +
>>>> +BOOT_PERFORMANCE_TABLE          *mAcpiBootPerformanceTable = NULL;
>>>> +BOOT_PERFORMANCE_TABLE          mBootPerformanceTableTemplate = {
>>>> +  {
>>>> +    EFI_ACPI_5_0_FPDT_BOOT_PERFORMANCE_TABLE_SIGNATURE,
>>>> +    sizeof (BOOT_PERFORMANCE_TABLE)
>>>> +  },
>>>> +  {
>>>> +    {
>>>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_TYPE_FIRMWARE_BASIC_BOOT,    // Type
>>>> +      sizeof (EFI_ACPI_5_0_FPDT_FIRMWARE_BASIC_BOOT_RECORD),        // Length
>>>> +      EFI_ACPI_5_0_FPDT_RUNTIME_RECORD_REVISION_FIRMWARE_BASIC_BOOT // Revision
>>>> +    },
>>>> +    0,  // Reserved
>>>> +    //
>>>> +    // These values will be updated at runtime.
>>>> +    //
>>>> +    0,  // ResetEnd
>>>> +    0,  // OsLoaderLoadImageStart
>>>> +    0,  // OsLoaderStartImageStart
>>>> +    0,  // ExitBootServicesEntry
>>>> +    0   // ExitBootServicesExit
>>>> +  }
>>>> +};
>>>>
>>>> -//
>>>> -// The current maximum number of logging entries. If current number of
>>>> -// entries exceeds this value, it will re-allocate a larger array and
>>>> -// migration the old data to the larger array.
>>>> -//
>>>> -UINT32               mMaxGaugeRecords;
>>>> +typedef struct {
>>>> +  EFI_HANDLE    Handle;
>>>> +  CHAR8         NameString[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>>>> +  EFI_GUID      ModuleGuid;
>>>> +} HANDLE_GUID_MAP;
>>>>
>>>> -//
>>>> -// The handle to install Performance Protocol instance.
>>>> -//
>>>> -EFI_HANDLE           mHandle = NULL;
>>>> +HANDLE_GUID_MAP mCacheHandleGuidTable[CACHE_HANDLE_GUID_COUNT];
>>>> +UINTN           mCachePairCount = 0;
>>>> +
>>>> +UINT32  mLoadImageCount       = 0;
>>>> +UINT32  mPerformanceLength    = 0;
>>>> +UINT32  mMaxPerformanceLength = 0;
>>>> +UINT32  mBootRecordSize       = 0;
>>>> +UINT32  mBootRecordMaxSize    = 0;
>>>> +
>>>> +BOOLEAN mFpdtBufferIsReported = FALSE;
>>>> +BOOLEAN mLackSpaceIsReported  = FALSE;
>>>> +CHAR8   *mPlatformLanguage    = NULL;
>>>> +UINT8   *mPerformancePointer  = NULL;
>>>> +UINT8   *mBootRecordBuffer    = NULL;
>>>> +
>>>> +EFI_DEVICE_PATH_TO_TEXT_PROTOCOL  *mDevicePathToText = NULL;
>>>>
>>>>  //
>>>>  // Interfaces for Performance Protocol.
>>>>  //
>>>>  PERFORMANCE_PROTOCOL mPerformanceInterface = {
>>>> @@ -61,179 +99,1069 @@ PERFORMANCE_EX_PROTOCOL mPerformanceExInterface = {
>>>>    GetGaugeEx
>>>>    };
>>>>
>>>>  PERFORMANCE_PROPERTY  mPerformanceProperty;
>>>>
>>>> -//
>>>> -//  Gauge record lock to avoid data corruption or even memory overflow
>>>> -//
>>>> -STATIC EFI_LOCK mPerfRecordLock = EFI_INITIALIZE_LOCK_VARIABLE (TPL_NOTIFY);
>>>> +/**
>>>> +Check whether the Token is a known one which is uesed by core.
>>>> +
>>>> +@param  Token      Pointer to a Null-terminated ASCII string
>>>> +
>>>> +@retval TRUE       Is a known one used by core.
>>>> +@retval FALSE      Not a known one.
>>>> +
>>>> +**/
>>>> +BOOLEAN
>>>> +IsKnownTokens (
>>>> +  IN CONST CHAR8  *Token
>>>> +  )
>>>> +{
>>>> +  if (AsciiStrCmp (Token, SEC_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, PEI_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, DXE_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, BDS_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, START_IMAGE_TOK) == 0 ||
>>>> +      AsciiStrCmp (Token, PEIM_TOK) == 0) {
>>>> +    return TRUE;
>>>> +  } else {
>>>> +    return FALSE;
>>>> +  }
>>>> +}
>>>> +
>>>> +/**
>>>> +Check whether the ID is a known one which map to the known Token.
>>>> +
>>>> +@param  Identifier  32-bit identifier.
>>>> +
>>>> +@retval TRUE        Is a known one used by core.
>>>> +@retval FALSE       Not a known one.
>>>> +
>>>> +**/
>>>> +BOOLEAN
>>>> +IsKnownID (
>>>> +  IN UINT32       Identifier
>>>> +  )
>>>> +{
>>>> +  if (Identifier == MODULE_START_ID ||
>>>> +      Identifier == MODULE_END_ID ||
>>>> +      Identifier == MODULE_LOADIMAGE_START_ID ||
>>>> +      Identifier == MODULE_LOADIMAGE_END_ID ||
>>>> +      Identifier == MODULE_DB_START_ID ||
>>>> +      Identifier == MODULE_DB_END_ID ||
>>>> +      Identifier == MODULE_DB_SUPPORT_START_ID ||
>>>> +      Identifier == MODULE_DB_SUPPORT_END_ID ||
>>>> +      Identifier == MODULE_DB_STOP_START_ID ||
>>>> +      Identifier == MODULE_DB_STOP_END_ID) {
>>>> +    return TRUE;
>>>> +  } else {
>>>> +    return FALSE;
>>>> +  }
>>>> +}
>>>>
>>>>  /**
>>>> -  Searches in the gauge array with keyword Handle, Token, Module and Identifier.
>>>> +  Allocate EfiReservedMemoryType below 4G memory address.
>>>> +
>>>> +  This function allocates EfiReservedMemoryType below 4G memory address.
>>>> +
>>>> +  @param[in]  Size   Size of memory to allocate.
>>>> +
>>>> +  @return Allocated address for output.
>>>> +
>>>> +**/
>>>> +VOID *
>>>> +FpdtAllocateReservedMemoryBelow4G (
>>>> +  IN UINTN       Size
>>>> +  )
>>>> +{
>>>> +  UINTN                 Pages;
>>>> +  EFI_PHYSICAL_ADDRESS  Address;
>>>> +  EFI_STATUS            Status;
>>>> +  VOID                  *Buffer;
>>>> +
>>>> +  Buffer  = NULL;
>>>> +  Pages   = EFI_SIZE_TO_PAGES (Size);
>>>> +  Address = 0xffffffff;
>>>> +
>>>> +  Status = gBS->AllocatePages (
>>>> +                  AllocateMaxAddress,
>>>> +                  EfiReservedMemoryType,
>>>> +                  Pages,
>>>> +                  &Address
>>>> +                  );
>>>> +  ASSERT_EFI_ERROR (Status);
>>>
>>> This code is breaking DEBUG builds on ARM systems that have no memory
>>> below 4 GB.
>>>
>>>> +
>>>> +  if (!EFI_ERROR (Status)) {
>>>> +    Buffer = (VOID *) (UINTN) Address;
>>>> +    ZeroMem (Buffer, Size);
>>>> +  }
>>>> +
>>>> +  return Buffer;
>>>> +}
>>>> +
>>>> +/**
>>>> +  Allocate buffer for Boot Performance table.
>>>> +
>>>> +  @return Status code.
>>>> +
>>>> +**/
>>>> +EFI_STATUS
>>>> +AllocateBootPerformanceTable (
>>>> +  )
>>>> +{
>>>> +  EFI_STATUS                    Status;
>>>> +  UINTN                         Size;
>>>> +  UINT8                         *SmmBootRecordCommBuffer;
>>>> +  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
>>>> +  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
>>>> +  UINTN                         CommSize;
>>>> +  UINTN                         BootPerformanceDataSize;
>>>> +  UINT8                         *BootPerformanceData;
>>>> +  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
>>>> +  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;
>>>> +  EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *SmmCommRegionTable;
>>>> +  EFI_MEMORY_DESCRIPTOR         *SmmCommMemRegion;
>>>> +  UINTN                         Index;
>>>> +  VOID                          *SmmBootRecordData;
>>>> +  UINTN                         SmmBootRecordDataSize;
>>>> +  UINTN                         ReservedMemSize;
>>>> +
>>>> +  //
>>>> +  // Collect boot records from SMM drivers.
>>>> +  //
>>>> +  SmmBootRecordCommBuffer = NULL;
>>>> +  SmmCommData             = NULL;
>>>> +  SmmBootRecordData       = NULL;
>>>> +  SmmBootRecordDataSize   = 0;
>>>> +  ReservedMemSize         = 0;
>>>> +  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
>>>> +  if (!EFI_ERROR (Status)) {
>>>> +    //
>>>> +    // Initialize communicate buffer
>>>> +    // Get the prepared Reserved Memory Range
>>>> +    //
>>>> +    Status = EfiGetSystemConfigurationTable (
>>>> +              &gEdkiiPiSmmCommunicationRegionTableGuid,
>>>> +              (VOID **) &SmmCommRegionTable
>>>> +              );
>>>> +    if (!EFI_ERROR (Status)) {
>>>> +      ASSERT (SmmCommRegionTable != NULL);
>>>> +      SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) (SmmCommRegionTable + 1);
>>>> +      for (Index = 0; Index < SmmCommRegionTable->NumberOfEntries; Index ++) {
>>>> +        if (SmmCommMemRegion->Type == EfiConventionalMemory) {
>>>> +          break;
>>>> +        }
>>>> +        SmmCommMemRegion = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) SmmCommMemRegion + SmmCommRegionTable->DescriptorSize);
>>>> +      }
>>>> +      ASSERT (Index < SmmCommRegionTable->NumberOfEntries);
>>>> +      ASSERT (SmmCommMemRegion->PhysicalStart > 0);
>>>> +      ASSERT (SmmCommMemRegion->NumberOfPages > 0);
>>>> +      ReservedMemSize = (UINTN) SmmCommMemRegion->NumberOfPages * EFI_PAGE_SIZE;
>>>> +
>>>> +      //
>>>> +      // Check enough reserved memory space
>>>> +      //
>>>> +      if (ReservedMemSize > SMM_BOOT_RECORD_COMM_SIZE) {
>>>> +        SmmBootRecordCommBuffer = (VOID *) (UINTN) SmmCommMemRegion->PhysicalStart;
>>>> +        SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
>>>> +        SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
>>>> +        ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));
>>>> +
>>>> +        CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
>>>> +        SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
>>>> +        CommSize = SMM_BOOT_RECORD_COMM_SIZE;
>>>> +
>>>> +        //
>>>> +        // Get the size of boot records.
>>>> +        //
>>>> +        SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
>>>> +        SmmCommData->BootRecordData = NULL;
>>>> +        Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>>>> +        ASSERT_EFI_ERROR (Status);
>>>> +
>>>> +        if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
>>>> +          //
>>>> +          // Get all boot records
>>>> +          //
>>>> +          SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA_BY_OFFSET;
>>>> +          SmmBootRecordDataSize       = SmmCommData->BootRecordSize;
>>>> +          SmmBootRecordData           = AllocateZeroPool(SmmBootRecordDataSize);
>>>> +          ASSERT (SmmBootRecordData  != NULL);
>>>> +          SmmCommData->BootRecordOffset = 0;
>>>> +          SmmCommData->BootRecordData   = (VOID *) ((UINTN) SmmCommMemRegion->PhysicalStart + SMM_BOOT_RECORD_COMM_SIZE);
>>>> +          SmmCommData->BootRecordSize   = ReservedMemSize - SMM_BOOT_RECORD_COMM_SIZE;
>>>> +          while (SmmCommData->BootRecordOffset < SmmBootRecordDataSize) {
>>>> +            Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
>>>> +            ASSERT_EFI_ERROR (Status);
>>>> +            ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
>>>> +            if (SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize > SmmBootRecordDataSize) {
>>>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmBootRecordDataSize - SmmCommData->BootRecordOffset);
>>>> +            } else {
>>>> +              CopyMem ((UINT8 *) SmmBootRecordData + SmmCommData->BootRecordOffset, SmmCommData->BootRecordData, SmmCommData->BootRecordSize);
>>>> +            }
>>>> +            SmmCommData->BootRecordOffset = SmmCommData->BootRecordOffset + SmmCommData->BootRecordSize;
>>>> +          }
>>>> +        }
>>>> +      }
>>>> +    }
>>>> +  }
>>>> +
>>>> +  //
>>>> +  // Prepare memory for Boot Performance table.
>>>> +  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records.
>>>> +  //
>>>> +  BootPerformanceDataSize = sizeof (BOOT_PERFORMANCE_TABLE) + mPerformanceLength + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>>>> +  if (SmmCommData != NULL) {
>>>> +    BootPerformanceDataSize += SmmBootRecordDataSize;
>>>> +  }
>>>> +
>>>> +  //
>>>> +  // Try to allocate the same runtime buffer as last time boot.
>>>> +  //
>>>> +  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
>>>> +  Size = sizeof (PerformanceVariable);
>>>> +  Status = gRT->GetVariable (
>>>> +                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>>>> +                  &gEfiFirmwarePerformanceGuid,
>>>> +                  NULL,
>>>> +                  &Size,
>>>> +                  &PerformanceVariable
>>>> +                  );
>>>> +  if (!EFI_ERROR (Status)) {
>>>> +    Status = gBS->AllocatePages (
>>>> +                    AllocateAddress,
>>>> +                    EfiReservedMemoryType,
>>>> +                    EFI_SIZE_TO_PAGES (BootPerformanceDataSize),
>>>> +                    &PerformanceVariable.BootPerformanceTablePointer
>>>> +                    );
>>>> +    if (!EFI_ERROR (Status)) {
>>>> +      mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) (UINTN) PerformanceVariable.BootPerformanceTablePointer;
>>>> +    }
>>>> +  }
>>>> +
>>>> +  if (mAcpiBootPerformanceTable == NULL) {
>>>> +    //
>>>> +    // Fail to allocate at specified address, continue to allocate at any address.
>>>> +    //
>>>> +    mAcpiBootPerformanceTable = (BOOT_PERFORMANCE_TABLE *) FpdtAllocateReservedMemoryBelow4G (BootPerformanceDataSize);
>>>
>>> Why does this allocation need to live below 4 GB?
>>>
>>> If there is no good reason, can we please get rid of this?
>>> If there is a good reason, can we please document it in the code?
>>>
>>>> +  }
>>>> +  DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: ACPI Boot Performance Table address = 0x%x\n", mAcpiBootPerformanceTable));
>>>> +
>>>> +  if (mAcpiBootPerformanceTable == NULL) {
>>>> +    if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>>>> +      FreePool (SmmBootRecordData);
>>>> +    }
>>>> +    return EFI_OUT_OF_RESOURCES;
>>>> +  }
>>>> +
>>>> +  //
>>>> +  // Prepare Boot Performance Table.
>>>> +  //
>>>> +  BootPerformanceData = (UINT8 *) mAcpiBootPerformanceTable;
>>>> +  //
>>>> +  // Fill Basic Boot record to Boot Performance Table.
>>>> +  //
>>>> +  CopyMem (mAcpiBootPerformanceTable, &mBootPerformanceTableTemplate, sizeof (mBootPerformanceTableTemplate));
>>>> +  BootPerformanceData = BootPerformanceData + mAcpiBootPerformanceTable->Header.Length;
>>>> +  //
>>>> +  // Fill Boot records from boot drivers.
>>>> +  //
>>>> +  if (mPerformancePointer != NULL) {
>>>> +    CopyMem (BootPerformanceData, mPerformancePointer, mPerformanceLength);
>>>> +    mAcpiBootPerformanceTable->Header.Length += mPerformanceLength;
>>>> +    BootPerformanceData = BootPerformanceData + mPerformanceLength;
>>>> +  }
>>>> +  if (SmmCommData != NULL && SmmBootRecordData != NULL) {
>>>> +    //
>>>> +    // Fill Boot records from SMM drivers.
>>>> +    //
>>>> +    CopyMem (BootPerformanceData, SmmBootRecordData, SmmBootRecordDataSize);
>>>> +    FreePool (SmmBootRecordData);
>>>> +    mAcpiBootPerformanceTable->Header.Length = (UINT32) (mAcpiBootPerformanceTable->Header.Length + SmmBootRecordDataSize);
>>>> +    BootPerformanceData = BootPerformanceData + SmmBootRecordDataSize;
>>>> +  }
>>>> +
>>>> +  //
>>>> +  // Save Boot Performance Table address to Variable for use in S4 resume.
>>>> +  //
>>>> +  PerformanceVariable.BootPerformanceTablePointer = (EFI_PHYSICAL_ADDRESS) (UINTN) mAcpiBootPerformanceTable;
>>>> +
>>>> +  //
>>>> +  // Save Runtime Performance Table pointers to Variable.
>>>> +  // Don't check SetVariable return status. It doesn't impact FPDT table generation.
>>>> +  //
>>>> +  gRT->SetVariable (
>>>> +        EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
>>>> +        &gEfiFirmwarePerformanceGuid,
>>>> +        EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
>>>> +        sizeof (PerformanceVariable),
>>>> +        &PerformanceVariable
>>>> +        );
>>>> +
>>>> +  mBootRecordBuffer  = (UINT8 *) mAcpiBootPerformanceTable;
>>>> +  mBootRecordSize    = mAcpiBootPerformanceTable->Header.Length;
>>>> +  mBootRecordMaxSize = mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
>>>> +
>>>> +  return EFI_SUCCESS;
>>>> +}
>>>> +
>>>> +/**
>>>> +  Get a human readable module name and module guid for the given image handle.
>>>> +  If module name can't be found, "" string will return.
>>>> +  If module guid can't be found, Zero Guid will return.
>>>> +
>>>> +  @param    Handle        Image handle or Controller handle.
>>>> +  @param    NameString    The ascii string will be filled into it. If not found, null string will return.
>>>> +  @param    BufferSize    Size of the input NameString buffer.
>>>> +  @param    ModuleGuid    Point to the guid buffer to store the got module guid value.
>>>> +
>>>> +  @retval EFI_SUCCESS     Successfully get module name and guid.
>>>> +  @retval EFI_INVALID_PARAMETER  The input parameter NameString is NULL.
>>>> +  @retval other value  Module Name can't be got.
>>>> +**/
>>>> +EFI_STATUS
>>>> +GetModuleInfoFromHandle (
>>>> +  IN EFI_HANDLE  Handle,
>>>> +  OUT CHAR8            *NameString,
>>>> +  IN UINTN             BufferSize,
>>>> +  OUT EFI_GUID         *ModuleGuid OPTIONAL
>>>> +  )
>>>> +{
>>>> +  EFI_STATUS                  Status;
>>>> +  EFI_LOADED_IMAGE_PROTOCOL   *LoadedImage;
>>>> +  EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
>>>> +  CHAR8                       *PdbFileName;
>>>> +  EFI_GUID                    *TempGuid;
>>>> +  UINTN                       StartIndex;
>>>> +  UINTN                       Index;
>>>> +  INTN                        Count;
>>>> +  BOOLEAN                     ModuleGuidIsGet;
>>>> +  UINTN                       StringSize;
>>>> +  CHAR16                      *StringPtr;
>>>> +  EFI_COMPONENT_NAME2_PROTOCOL      *ComponentName2;
>>>> +  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath;
>>>> +
>>>> +  if (NameString == NULL || BufferSize == 0) {
>>>> +    return EFI_INVALID_PARAMETER;
>>>> +  }
>>>> +  //
>>>> +  // Try to get the ModuleGuid and name string form the caached array.
>>>> +  //
>>>> +  if (mCachePairCount > 0) {
>>>> +    for (Count = mCachePairCount -1; Count >= 0; Count--) {
>>>> +      if (Handle == mCacheHandleGuidTable[Count].Handle) {
>>>> +        CopyGuid (ModuleGuid, &mCacheHandleGuidTable[Count].ModuleGuid);
>>>> +        AsciiStrCpyS (NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, mCacheHandleGuidTable[Count].NameString);
>>>> +        return EFI_SUCCESS;
>>>> +      }
>>>> +    }
>>>> +  }
>>>> +
>>>> +  Status = EFI_INVALID_PARAMETER;
>>>> +  LoadedImage     = NULL;
>>>> +  ModuleGuidIsGet = FALSE;
>>>> +
>>>> +  //
>>>> +  // Initialize GUID as zero value.
>>>> +  //
>>>> +  TempGuid    = &gZeroGuid;
>>>> +  //
>>>> +  // Initialize it as "" string.
>>>> +  //
>>>> +  NameString[0] = 0;
>>>> +
>>>> +  if (Handle != NULL) {
>>>> +    //
>>>> +    // Try Handle as ImageHandle.
>>>> +    //
>>>> +    Status = gBS->HandleProtocol (
>>>> +                  Handle,
>>>> +                  &gEfiLoadedImageProtocolGuid,
>>>> +                  (VOID**) &LoadedImage
>>>> +                  );
>>>> +
>>>> +    if (EFI_ERROR (Status)) {
>>>> +      //
>>>> +      // Try Handle as Controller Handle
>>>> +      //
>>>> +      Status = gBS->OpenProtocol (
>>>> +                    Handle,
>>>> +                    &gEfiDriverBindingProtocolGuid,
>>>> +                    (VOID **) &DriverBinding,
>>>> +                    NULL,
>>>> +                    NULL,
>>>> +                    EFI_OPEN_PROTOCOL_GET_PROTOCOL
>>>> +                    );
>>>> +      if (!EFI_ERROR (Status)) {
>>>> +        //
>>>> +        // Get Image protocol from ImageHandle
>>>> +        //
>>>> +        Status = gBS->HandleProtocol (
>>>> +                      DriverBinding->ImageHandle,
>>>> +                      &gEfiLoadedImageProtocolGuid,
>>>> +                      (VOID**) &LoadedImage
>>>> +                      );
>>>> +      }
>>>> +    }
>>>> +  }
>>>> +
>>>> +  if (!EFI_ERROR (Status) && LoadedImage != NULL) {
>>>> +    //
>>>> +    // Get Module Guid from DevicePath.
>>>> +    //
>>>> +    if (LoadedImage->FilePath != NULL &&
>>>> +        LoadedImage->FilePath->Type == MEDIA_DEVICE_PATH &&
>>>> +        LoadedImage->FilePath->SubType == MEDIA_PIWG_FW_FILE_DP
>>>> +       ) {
>>>> +      //
>>>> +      // Determine GUID associated with module logging performance
>>>> +      //
>>>> +      ModuleGuidIsGet = TRUE;
>>>> +      FvFilePath      = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) LoadedImage->FilePath;
>>>> +      TempGuid        = &FvFilePath->FvFileName;
>>>> +    }
>>>> +
>>>> +    //
>>>> +    // Method 1 Get Module Name from PDB string.
>>>> +    //
>>>> +    PdbFileName = PeCoffLoaderGetPdbPointer (LoadedImage->ImageBase);
>>>> +    if (PdbFileName != NULL && BufferSize > 0) {
>>>> +      StartIndex = 0;
>>>> +      for (Index = 0; PdbFileName[Index] != 0; Index++) {
>>>> +        if ((PdbFileName[Index] == '\\') || (PdbFileName[Index] == '/')) {
>>>> +          StartIndex = Index + 1;
>>>> +        }
>>>> +      }
>>>> +      //
>>>> +      // Copy the PDB file name to our temporary string.
>>>> +      // If the length is bigger than BufferSize, trim the redudant characters to avoid overflow in array boundary.
>>>> +      //
>>>> +      for (Index = 0; Index < BufferSize - 1; Index++) {
>>>> +        NameString[Index] = PdbFileName[Index + StartIndex];
>>>> +        if (NameString[Index] == 0 || NameString[Index] == '.') {
>>>> +          NameString[Index] = 0;
>>>> +          break;
>>>> +        }
>>>> +      }
>>>>
>>>> -  This internal function searches for the gauge entry in the gauge array.
>>>> -  If there is an entry that exactly matches the given keywords
>>>> -  and its end time stamp is zero, then the index of that gauge entry is returned;
>>>> -  otherwise, the the number of gauge entries in the array is returned.
>>>> +      if (Index == BufferSize - 1) {
>>>> +        NameString[Index] = 0;
>>>> +      }
>>>> +      //
>>>> +      // Module Name is got.
>>>> +      //
>>>> +      goto Done;
>>>> +    }
>>>> +  }
>>>>
>>>> +  //
>>>> +  // Method 2: Get the name string from ComponentName2 protocol
>>>> +  //
>>>> +  Status = gBS->HandleProtocol (
>>>> +                  Handle,
>>>> +                  &gEfiComponentName2ProtocolGuid,
>>>> +                  (VOID **) &ComponentName2
>>>> +                  );
>>>> +  if (!EFI_ERROR (Status)) {
>>>> +    //
>>>> +    // Get the current platform language setting
>>>> +    //
>>>> +    if (mPlatformLanguage == NULL) {
>>>> +      GetEfiGlobalVariable2 (L"PlatformLang", (VOID **) &mPlatformLanguage, NULL);
>>>> +    }
>>>> +    if (mPlatformLanguage != NULL) {
>>>> +      Status = ComponentName2->GetDriverName (
>>>> +                                 ComponentName2,
>>>> +                                 mPlatformLanguage != NULL ? mPlatformLanguage : "en-US",
>>>> +                                 &StringPtr
>>>> +                                 );
>>>> +      if (!EFI_ERROR (Status)) {
>>>> +        for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>>>> +          NameString[Index] = (CHAR8) StringPtr[Index];
>>>> +        }
>>>> +        NameString[Index] = 0;
>>>> +        //
>>>> +        // Module Name is got.
>>>> +        //
>>>> +        goto Done;
>>>> +      }
>>>> +    }
>>>> +  }
>>>> +
>>>> +  if (ModuleGuidIsGet) {
>>>> +    //
>>>> +    // Method 3 Try to get the image's FFS UI section by image GUID
>>>> +    //
>>>> +    StringPtr  = NULL;
>>>> +    StringSize = 0;
>>>> +    Status = GetSectionFromAnyFv (
>>>> +              TempGuid,
>>>> +              EFI_SECTION_USER_INTERFACE,
>>>> +              0,
>>>> +              (VOID **) &StringPtr,
>>>> +              &StringSize
>>>> +              );
>>>> +
>>>> +    if (!EFI_ERROR (Status)) {
>>>> +      //
>>>> +      // Method 3. Get the name string from FFS UI section
>>>> +      //
>>>> +      for (Index = 0; Index < BufferSize - 1 && StringPtr[Index] != 0; Index++) {
>>>> +        NameString[Index] = (CHAR8) StringPtr[Index];
>>>> +      }
>>>> +      NameString[Index] = 0;
>>>> +      FreePool (StringPtr);
>>>> +    }
>>>> +  }
>>>> +
>>>> +Done:
>>>> +  //
>>>> +  // Copy Module Guid
>>>> +  //
>>>> +  if (ModuleGuid != NULL) {
>>>> +    CopyGuid (ModuleGuid, TempGuid);
>>>> +    if (IsZeroGuid(TempGuid) && (Handle != NULL) && !ModuleGuidIsGet) {
>>>> +        // Handle is GUID
>>>> +      CopyGuid (ModuleGuid, (EFI_GUID *) Handle);
>>>> +    }
>>>> +  }
>>>> +
>>>> +  //
>>>> +  // Cache the Handle and Guid pairs.
>>>> +  //
>>>> +  if (mCachePairCount < CACHE_HANDLE_GUID_COUNT) {
>>>> +    mCacheHandleGuidTable[mCachePairCount].Handle = Handle;
>>>> +    CopyGuid (&mCacheHandleGuidTable[mCachePairCount].ModuleGuid, ModuleGuid);
>>>> +    AsciiStrCpyS (mCacheHandleGuidTable[mCachePairCount].NameString, EDKII_STRING_EVENT_RECORD_NAME_LENGTH, NameString);
>>>> +    mCachePairCount ++;
>>>> +  }
>>>> +
>>>> +  return Status;
>>>> +}
>>>> +
>>>> +/**
>>>> +  Get the FPDT record info.
>>>> +
>>>> +  @param  IsStart                 TRUE if the performance log is start log.
>>>>    @param  Handle                  Pointer to environment specific context used
>>>>                                    to identify the component being measured.
>>>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>>>                                    that identifies the component being measured.
>>>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>>>                                    that identifies the module being measured.
>>>> -  @param  Identifier              32-bit identifier.
>>>> +  @param  RecordInfo              On return, pointer to the info of the record.
>>>> +  @param  UseModuleName           Only useful for DYNAMIC_STRING_EVENT_TYPE, indicate that whether need use
>>>> +                                  Module name to fill the string field in the DYNAMIC_STRING_EVENT_RECORD.
>>>>
>>>> -  @retval The index of gauge entry in the array.
>>>> +  @retval EFI_SUCCESS          Get record info successfully.
>>>> +  @retval EFI_UNSUPPORTED      No matched FPDT record.
>>>>
>>>>  **/
>>>> -UINT32
>>>> -InternalSearchForGaugeEntry (
>>>> -  IN CONST VOID                 *Handle,  OPTIONAL
>>>> -  IN CONST CHAR8                *Token,   OPTIONAL
>>>> -  IN CONST CHAR8                *Module,   OPTIONAL
>>>> -  IN UINT32                     Identifier
>>>> +EFI_STATUS
>>>> +GetFpdtRecordInfo (
>>>> +  IN BOOLEAN                  IsStart,
>>>> +  IN CONST VOID               *Handle,
>>>> +  IN CONST CHAR8              *Token,
>>>> +  IN CONST CHAR8              *Module,
>>>> +  OUT BASIC_RECORD_INFO       *RecordInfo,
>>>> +  IN OUT BOOLEAN              *UseModuleName
>>>>    )
>>>>  {
>>>> -  UINT32                    Index;
>>>> -  UINT32                    Index2;
>>>> -  UINT32                    NumberOfEntries;
>>>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>>>> +  UINT16              RecordType;
>>>> +  UINTN               StringSize;
>>>>
>>>> -  if (Token == NULL) {
>>>> -    Token = "";
>>>> -  }
>>>> -  if (Module == NULL) {
>>>> -    Module = "";
>>>> +  RecordType    = DYNAMIC_STRING_EVENT_TYPE;
>>>> +
>>>> +  //
>>>> +  // Token to Type and Id.
>>>> +  //
>>>> +  if (Token != NULL) {
>>>> +    if (AsciiStrCmp (Token, START_IMAGE_TOK) == 0) {                // "StartImage:"
>>>> +      *UseModuleName = TRUE;
>>>> +      RecordType     = GUID_EVENT_TYPE;
>>>> +      if (IsStart) {
>>>> +        RecordInfo->ProgressID  = MODULE_START_ID;
>>>> +      } else {
>>>> +        RecordInfo->ProgressID  = MODULE_END_ID;
>>>> +      }
>>>> +    } else if (AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {          // "LoadImage:"
>>>> +      *UseModuleName = TRUE;
>>>> +      RecordType = GUID_QWORD_EVENT_TYPE;
>>>> +      if (IsStart) {
>>>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_START_ID;
>>>> +      } else {
>>>> +        RecordInfo->ProgressID  = MODULE_LOADIMAGE_END_ID;
>>>> +      }
>>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_START_TOK) == 0) {  // "DB:Start:"
>>>> +      *UseModuleName = TRUE;
>>>> +      if (IsStart) {
>>>> +        RecordInfo->ProgressID  = MODULE_DB_START_ID;
>>>> +        RecordType   = GUID_QWORD_EVENT_TYPE;
>>>> +      } else {
>>>> +        RecordInfo->ProgressID  = MODULE_DB_END_ID;
>>>> +        RecordType   = GUID_QWORD_STRING_EVENT_TYPE;
>>>> +      }
>>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_SUPPORT_TOK) == 0) { // "DB:Support:"
>>>> +      *UseModuleName = TRUE;
>>>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>>> +        return RETURN_UNSUPPORTED;
>>>> +      }
>>>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>>>> +      if (IsStart) {
>>>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_START_ID;
>>>> +      } else {
>>>> +        RecordInfo->ProgressID  = MODULE_DB_SUPPORT_END_ID;
>>>> +      }
>>>> +    } else if (AsciiStrCmp (Token, DRIVERBINDING_STOP_TOK) == 0) {    // "DB:Stop:"
>>>> +      *UseModuleName = TRUE;
>>>> +      if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>>> +         return RETURN_UNSUPPORTED;
>>>> +      }
>>>> +      RecordType     = GUID_QWORD_EVENT_TYPE;
>>>> +      if (IsStart) {
>>>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_START_ID;
>>>> +      } else {
>>>> +        RecordInfo->ProgressID  = MODULE_DB_STOP_END_ID;
>>>> +      }
>>>> +    } else if (AsciiStrCmp (Token, PEI_TOK) == 0 ||                   // "PEI"
>>>> +               AsciiStrCmp (Token, DXE_TOK) == 0 ||                   // "DXE"
>>>> +               AsciiStrCmp (Token, BDS_TOK) == 0) {                   // "BDS"
>>>> +      if (IsStart) {
>>>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_START_ID;
>>>> +      } else {
>>>> +        RecordInfo->ProgressID  = PERF_CROSSMODULE_END_ID;
>>>> +      }
>>>> +    } else {                                                          // Pref used in Modules.
>>>> +      if (IsStart) {
>>>> +        RecordInfo->ProgressID  = PERF_INMODULE_START_ID;
>>>> +      } else {
>>>> +        RecordInfo->ProgressID  = PERF_INMODULE_END_ID;
>>>> +      }
>>>> +    }
>>>> +  } else if (Handle!= NULL || Module != NULL) {                       // Pref used in Modules.
>>>> +    if (IsStart) {
>>>> +      RecordInfo->ProgressID    = PERF_INMODULE_START_ID;
>>>> +    } else {
>>>> +      RecordInfo->ProgressID    = PERF_INMODULE_END_ID;
>>>> +    }
>>>> +  } else {
>>>> +    return EFI_UNSUPPORTED;
>>>>    }
>>>>
>>>> -  NumberOfEntries = mGaugeData->NumberOfEntries;
>>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>>> +  //
>>>> +  // Get Record size baesed on the record type.
>>>> +  // When PcdEdkiiFpdtStringRecordEnableOnly is TRUE, all records are with type of DYNAMIC_STRING_EVENT_TYPE.
>>>> +  //
>>>> +  if (PcdGetBool (PcdEdkiiFpdtStringRecordEnableOnly)) {
>>>> +    RecordType               = DYNAMIC_STRING_EVENT_TYPE;
>>>> +    RecordInfo->RecordSize   = sizeof (DYNAMIC_STRING_EVENT_RECORD) + STRING_SIZE;
>>>> +  } else {
>>>> +    switch (RecordType) {
>>>> +    case GUID_EVENT_TYPE:
>>>> +      RecordInfo->RecordSize = sizeof (GUID_EVENT_RECORD);
>>>> +      break;
>>>>
>>>> -  Index2 = 0;
>>>> +    case DYNAMIC_STRING_EVENT_TYPE:
>>>> +      if (*UseModuleName) {
>>>> +        StringSize  = STRING_SIZE;
>>>> +      } else if (Token  != NULL) {
>>>> +        StringSize  = AsciiStrSize (Token);
>>>> +      } else if (Module != NULL) {
>>>> +        StringSize  = AsciiStrSize (Module);
>>>> +      } else {
>>>> +        StringSize  = STRING_SIZE;
>>>> +      }
>>>> +      if (StringSize > STRING_SIZE) {
>>>> +        StringSize   = STRING_SIZE;
>>>> +      }
>>>> +      RecordInfo->RecordSize = (UINT8)(sizeof (DYNAMIC_STRING_EVENT_RECORD) + StringSize);
>>>> +      break;
>>>>
>>>> -  for (Index = 0; Index < NumberOfEntries; Index++) {
>>>> -    Index2 = NumberOfEntries - 1 - Index;
>>>> -    if (GaugeEntryExArray[Index2].EndTimeStamp == 0 &&
>>>> -        (GaugeEntryExArray[Index2].Handle == (EFI_PHYSICAL_ADDRESS) (UINTN) Handle) &&
>>>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Token, Token, DXE_PERFORMANCE_STRING_LENGTH) == 0 &&
>>>> -        AsciiStrnCmp (GaugeEntryExArray[Index2].Module, Module, DXE_PERFORMANCE_STRING_LENGTH) == 0) {
>>>> -      Index = Index2;
>>>> +    case GUID_QWORD_EVENT_TYPE:
>>>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_EVENT_RECORD);
>>>>        break;
>>>> +
>>>> +    case GUID_QWORD_STRING_EVENT_TYPE:
>>>> +      RecordInfo->RecordSize = (UINT8)sizeof (GUID_QWORD_STRING_EVENT_RECORD);
>>>> +      break;
>>>> +
>>>> +    default:
>>>> +      //
>>>> +      // Record is unsupported yet, return EFI_UNSUPPORTED
>>>> +      //
>>>> +      return EFI_UNSUPPORTED;
>>>>      }
>>>>    }
>>>>
>>>> -  return Index;
>>>> +  RecordInfo->Type = RecordType;
>>>> +  return EFI_SUCCESS;
>>>>  }
>>>>
>>>>  /**
>>>> -  Adds a record at the end of the performance measurement log
>>>> -  that records the start time of a performance measurement.
>>>> -
>>>> -  Adds a record to the end of the performance measurement log
>>>> -  that contains the Handle, Token, Module and Identifier.
>>>> -  The end time of the new record must be set to zero.
>>>> -  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>>>> -  If TimeStamp is zero, the start time in the record is filled in with the value
>>>> -  read from the current time stamp.
>>>> +  Add performance log to FPDT boot record table.
>>>>
>>>> +  @param  IsStart                 TRUE if the performance log is start log.
>>>>    @param  Handle                  Pointer to environment specific context used
>>>>                                    to identify the component being measured.
>>>>    @param  Token                   Pointer to a Null-terminated ASCII string
>>>>                                    that identifies the component being measured.
>>>>    @param  Module                  Pointer to a Null-terminated ASCII string
>>>>                                    that identifies the module being measured.
>>>> -  @param  TimeStamp               64-bit time stamp.
>>>> +  @param  Ticker                  64-bit time stamp.
>>>>    @param  Identifier              32-bit identifier. If the value is 0, the created record
>>>>                                    is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>>>
>>>> -  @retval EFI_SUCCESS             The data was read correctly from the device.
>>>> +  @retval EFI_SUCCESS             Add FPDT boot record.
>>>>    @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>>> +  @retval EFI_UNSUPPORTED         No matched FPDT record.
>>>>
>>>>  **/
>>>>  EFI_STATUS
>>>> -EFIAPI
>>>> -StartGaugeEx (
>>>> +InsertFpdtMeasurement (
>>>> +  IN BOOLEAN      IsStart,
>>>>    IN CONST VOID   *Handle,  OPTIONAL
>>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>> -  IN UINT64       TimeStamp,
>>>> +  IN UINT64       Ticker,
>>>>    IN UINT32       Identifier
>>>>    )
>>>>  {
>>>> -  GAUGE_DATA_ENTRY_EX       *GaugeEntryExArray;
>>>> -  UINTN                     GaugeDataSize;
>>>> -  GAUGE_DATA_HEADER         *NewGaugeData;
>>>> -  UINTN                     OldGaugeDataSize;
>>>> -  GAUGE_DATA_HEADER         *OldGaugeData;
>>>> -  UINT32                    Index;
>>>> -  EFI_STATUS                Status;
>>>> +  EFI_GUID                     ModuleGuid;
>>>> +  CHAR8                        ModuleName[EDKII_STRING_EVENT_RECORD_NAME_LENGTH];
>>>> +  UINT8                        FpdtRecord[MAX_RECORD_SIZE];
>>>> +  EFI_STATUS                   Status;
>>>> +  FPDT_RECORD_PTR              FpdtRecordPtr;
>>>> +  BASIC_RECORD_INFO            RecordInfo;
>>>> +  UINT64                       TimeStamp;
>>>> +  UINTN                        DestMax;
>>>> +  UINTN                        StrLength;
>>>> +  CONST CHAR8                  *StringPtr;
>>>> +  BOOLEAN                      UseModuleName;
>>>> +
>>>> +  StringPtr     = NULL;
>>>> +  UseModuleName = FALSE;
>>>> +  ZeroMem (ModuleName, sizeof (ModuleName));
>>>> +  ZeroMem (FpdtRecord, sizeof (FpdtRecord));
>>>>
>>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>>> +  //
>>>> +  // Get record info (type, size, ProgressID and Module Guid).
>>>> +  //
>>>> +  Status = GetFpdtRecordInfo (IsStart, Handle, Token, Module, &RecordInfo, &UseModuleName);
>>>>    if (EFI_ERROR (Status)) {
>>>>      return Status;
>>>>    }
>>>>
>>>> -  Index = mGaugeData->NumberOfEntries;
>>>> -  if (Index >= mMaxGaugeRecords) {
>>>> +  //
>>>> +  // If PERF_START()/PERF_END() have specified the ProgressID,it has high priority.
>>>> +  // !!! Note: If the Pref is not the known Token used in the core but have same
>>>> +  // ID with the core Token, this case will not be supported.
>>>> +  // And in currtnt usage mode, for the unkown ID, there is a general rule:
>>>> +  // If it is start pref: the lower 4 bits of the ID should be 0.
>>>> +  // If it is end pref: the lower 4 bits of the ID should not be 0.
>>>> +  // If input ID doesn't follow the rule, we will adjust it.
>>>> +  //
>>>> +  if ((Identifier != 0) && (IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>>>> +    return EFI_UNSUPPORTED;
>>>> +  } else if ((Identifier != 0) && (!IsKnownID (Identifier)) && (!IsKnownTokens (Token))) {
>>>> +    if (IsStart && ((Identifier & 0x000F) != 0)) {
>>>> +      Identifier &= 0xFFF0;
>>>> +    } else if ((!IsStart) && ((Identifier & 0x000F) == 0)) {
>>>> +      Identifier += 1;
>>>> +    }
>>>> +    RecordInfo.ProgressID = (UINT16)Identifier;
>>>> +  }
>>>> +
>>>> +  if (mFpdtBufferIsReported) {
>>>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)FpdtRecord;
>>>> +  } else {
>>>> +    //
>>>> +    // Check if pre-allocated buffer is full
>>>>      //
>>>> -    // Try to enlarge the scale of gauge array.
>>>> +    if (mPerformanceLength + RecordInfo.RecordSize > mMaxPerformanceLength) {
>>>> +      mPerformancePointer = ReallocatePool (
>>>> +                              mPerformanceLength,
>>>> +                              mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER,
>>>> +                              mPerformancePointer
>>>> +                              );
>>>> +
>>>> +      if (mPerformancePointer == NULL) {
>>>> +        return EFI_OUT_OF_RESOURCES;
>>>> +      }
>>>> +      mMaxPerformanceLength = mPerformanceLength + RecordInfo.RecordSize + FIRMWARE_RECORD_BUFFER;
>>>> +    }
>>>>      //
>>>> -    OldGaugeData      = mGaugeData;
>>>> -    OldGaugeDataSize  = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords;
>>>> +    // Covert buffer to FPDT Ptr Union type.
>>>> +    //
>>>> +    FpdtRecordPtr.RecordHeader = (EFI_ACPI_5_0_FPDT_PERFORMANCE_RECORD_HEADER *)(mPerformancePointer + mPerformanceLength);
>>>> +  }
>>>> +  FpdtRecordPtr.RecordHeader->Length = 0;
>>>>
>>>> -    GaugeDataSize     = sizeof (GAUGE_DATA_HEADER) + sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords * 2;
>>>> +  //
>>>> +  // Get the TimeStamp.
>>>> +  //
>>>> +  if (Ticker == 0) {
>>>> +    Ticker    = GetPerformanceCounter ();
>>>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>>>> +  } else if (Ticker == 1) {
>>>> +    TimeStamp = 0;
>>>> +  } else {
>>>> +    TimeStamp = GetTimeInNanoSecond (Ticker);
>>>> +  }
>>>>
>>>> -    NewGaugeData = AllocateZeroPool (GaugeDataSize);
>>>> -    if (NewGaugeData == NULL) {
>>>> -      EfiReleaseLock (&mPerfRecordLock);
>>>> -      return EFI_OUT_OF_RESOURCES;
>>>> +  //
>>>> +  // Get the ModuleName and ModuleGuid form the handle.
>>>> +  //
>>>> +  GetModuleInfoFromHandle ((EFI_HANDLE *)Handle, ModuleName, sizeof (ModuleName), &ModuleGuid);
>>>> +
>>>> +  //
>>>> +  // Fill in the record information.
>>>> +  //
>>>> +  switch (RecordInfo.Type) {
>>>> +  case GUID_EVENT_TYPE:
>>>> +    FpdtRecordPtr.GuidEvent->Header.Type                = GUID_EVENT_TYPE;
>>>> +    FpdtRecordPtr.GuidEvent->Header.Length              = RecordInfo.RecordSize;
>>>> +    FpdtRecordPtr.GuidEvent->Header.Revision            = RECORD_REVISION_1;
>>>> +    FpdtRecordPtr.GuidEvent->ProgressID                 = RecordInfo.ProgressID;
>>>> +    FpdtRecordPtr.GuidEvent->Timestamp                  = TimeStamp;
>>>> +    CopyMem (&FpdtRecordPtr.GuidEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidEvent->Guid));
>>>> +    break;
>>>> +
>>>> +  case DYNAMIC_STRING_EVENT_TYPE:
>>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Type       = DYNAMIC_STRING_EVENT_TYPE;
>>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Length     = RecordInfo.RecordSize;
>>>> +    FpdtRecordPtr.DynamicStringEvent->Header.Revision   = RECORD_REVISION_1;
>>>> +    FpdtRecordPtr.DynamicStringEvent->ProgressID        = RecordInfo.ProgressID;
>>>> +    FpdtRecordPtr.DynamicStringEvent->Timestamp         = TimeStamp;
>>>> +    CopyMem (&FpdtRecordPtr.DynamicStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.DynamicStringEvent->Guid));
>>>> +
>>>> +    if (UseModuleName) {
>>>> +      StringPtr     = ModuleName;
>>>> +    } else if (Token != NULL) {
>>>> +      StringPtr     = Token;
>>>> +    } else if (Module != NULL) {
>>>> +      StringPtr     = Module;
>>>> +    } else if (ModuleName != NULL) {
>>>> +      StringPtr     = ModuleName;
>>>> +    }
>>>> +    if (StringPtr != NULL && AsciiStrLen (StringPtr) != 0) {
>>>> +      StrLength     = AsciiStrLen (StringPtr);
>>>> +      DestMax       = (RecordInfo.RecordSize - sizeof (DYNAMIC_STRING_EVENT_RECORD)) / sizeof (CHAR8);
>>>> +      if (StrLength >= DestMax) {
>>>> +        StrLength   = DestMax -1;
>>>> +      }
>>>> +      AsciiStrnCpyS (FpdtRecordPtr.DynamicStringEvent->String, DestMax, StringPtr, StrLength);
>>>>      }
>>>> +    break;
>>>> +
>>>> +  case GUID_QWORD_EVENT_TYPE:
>>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Type           = GUID_QWORD_EVENT_TYPE;
>>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Length         = RecordInfo.RecordSize;
>>>> +    FpdtRecordPtr.GuidQwordEvent->Header.Revision       = RECORD_REVISION_1;
>>>> +    FpdtRecordPtr.GuidQwordEvent->ProgressID            = RecordInfo.ProgressID;
>>>> +    FpdtRecordPtr.GuidQwordEvent->Timestamp             = TimeStamp;
>>>> +    CopyMem (&FpdtRecordPtr.GuidQwordEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordEvent->Guid));
>>>> +    if ((MODULE_LOADIMAGE_START_ID == RecordInfo.ProgressID) && AsciiStrCmp (Token, LOAD_IMAGE_TOK) == 0) {
>>>> +      mLoadImageCount++;
>>>> +      FpdtRecordPtr.GuidQwordEvent->Qword               = mLoadImageCount;
>>>> +    }
>>>> +    break;
>>>> +
>>>> +  case GUID_QWORD_STRING_EVENT_TYPE:
>>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Type     = GUID_QWORD_STRING_EVENT_TYPE;
>>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Length   = RecordInfo.RecordSize;
>>>> +    FpdtRecordPtr.GuidQwordStringEvent->Header.Revision = RECORD_REVISION_1;
>>>> +    FpdtRecordPtr.GuidQwordStringEvent->ProgressID      = RecordInfo.ProgressID;
>>>> +    FpdtRecordPtr.GuidQwordStringEvent->Timestamp       = TimeStamp;
>>>> +    CopyMem (&FpdtRecordPtr.GuidQwordStringEvent->Guid, &ModuleGuid, sizeof (FpdtRecordPtr.GuidQwordStringEvent->Guid));
>>>> +    break;
>>>> +
>>>> +  default:
>>>> +    //
>>>> +    // Record is not supported in current DXE phase, return EFI_ABORTED
>>>> +    //
>>>> +    return EFI_UNSUPPORTED;
>>>> +  }
>>>> +
>>>> +  //
>>>> +  // Report record one by one after records have been reported together.
>>>> +  //
>>>> +  if (mFpdtBufferIsReported) {
>>>> +      //
>>>> +      // Append Boot records to the boot performance table.
>>>> +      //
>>>> +      if (mBootRecordSize + FpdtRecordPtr.RecordHeader->Length > mBootRecordMaxSize) {
>>>> +        if (!mLackSpaceIsReported) {
>>>> +          DEBUG ((DEBUG_INFO, "DxeCorePerformanceLib: No enough space to save boot records\n"));
>>>> +          mLackSpaceIsReported = TRUE;
>>>> +        }
>>>> +        return EFI_OUT_OF_RESOURCES;
>>>> +      } else {
>>>> +        //
>>>> +        // Save boot record into BootPerformance table
>>>> +        //
>>>> +        CopyMem (mBootRecordBuffer + mBootRecordSize, FpdtRecordPtr.RecordHeader, FpdtRecordPtr.RecordHeader->Length);
>>>> +        mBootRecordSize += FpdtRecordPtr.RecordHeader->Length;
>>>> +        mAcpiBootPerformanceTable->Header.Length += FpdtRecordPtr.RecordHeader->Length;
>>>> +      }
>>>> +  } else {
>>>> +    //
>>>> +    // Update the cached FPDT record buffer.
>>>> +    //
>>>> +    mPerformanceLength += FpdtRecordPtr.RecordHeader->Length;
>>>> +  }
>>>> +
>>>> +  return EFI_SUCCESS;
>>>> +}
>>>> +
>>>> +/**
>>>> +  Dumps all the PEI performance.
>>>> +
>>>> +  @param  HobStart      A pointer to a Guid.
>>>>
>>>> -    mGaugeData = NewGaugeData;
>>>> -    mMaxGaugeRecords *= 2;
>>>> +  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>>>> +  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>>>> +  to DXE performance data structures.
>>>>
>>>> +**/
>>>> +VOID
>>>> +InternalGetPeiPerformance (
>>>> +  VOID  *HobStart
>>>> +  )
>>>> +{
>>>> +  UINT8                                *FirmwarePerformanceHob;
>>>> +  PEI_EXT_FIRMWARE_PERF_HEADER         *PeiPerformanceLogHeader;
>>>> +  UINT8                                *EventRec;
>>>> +  EFI_HOB_GUID_TYPE                    *GuidHob;
>>>> +
>>>> +  GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, HobStart);
>>>> +  while (GuidHob != NULL) {
>>>> +    FirmwarePerformanceHob  = GET_GUID_HOB_DATA (GuidHob);
>>>> +    PeiPerformanceLogHeader = (PEI_EXT_FIRMWARE_PERF_HEADER *)FirmwarePerformanceHob;
>>>> +
>>>> +    if (mPerformanceLength + PeiPerformanceLogHeader->SizeOfAllEntries > mMaxPerformanceLength) {
>>>> +      mPerformancePointer = ReallocatePool (
>>>> +                              mPerformanceLength,
>>>> +                              mPerformanceLength +
>>>> +                              (UINTN)PeiPerformanceLogHeader->SizeOfAllEntries +
>>>> +                              FIRMWARE_RECORD_BUFFER,
>>>> +                              mPerformancePointer
>>>> +                              );
>>>> +      ASSERT (mPerformancePointer != NULL);
>>>> +      mMaxPerformanceLength = mPerformanceLength +
>>>> +                              (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries) +
>>>> +                              FIRMWARE_RECORD_BUFFER;
>>>> +    }
>>>> +
>>>> +    EventRec = mPerformancePointer + mPerformanceLength;
>>>> +    CopyMem (EventRec, FirmwarePerformanceHob + sizeof (PEI_EXT_FIRMWARE_PERF_HEADER), (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries));
>>>>      //
>>>> -    // Initialize new data array and migrate old data one.
>>>> +    // Update the used buffer size.
>>>>      //
>>>> -    mGaugeData = CopyMem (mGaugeData, OldGaugeData, OldGaugeDataSize);
>>>> +    mPerformanceLength += (UINTN)(PeiPerformanceLogHeader->SizeOfAllEntries);
>>>> +    mLoadImageCount    += PeiPerformanceLogHeader->LoadImageCount;
>>>>
>>>> -    FreePool (OldGaugeData);
>>>> +    //
>>>> +    // Get next performance guid hob
>>>> +    //
>>>> +    GuidHob = GetNextGuidHob (&gEdkiiExtendedFirmwarePerformanceGuid, GET_NEXT_HOB (GuidHob));
>>>>    }
>>>> +}
>>>>
>>>> -  GaugeEntryExArray               = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>>> -  GaugeEntryExArray[Index].Handle = (EFI_PHYSICAL_ADDRESS) (UINTN) Handle;
>>>> +/**
>>>> +  Report Boot Perforamnce table address as report status code.
>>>>
>>>> -  if (Token != NULL) {
>>>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Token, DXE_PERFORMANCE_STRING_SIZE, Token, DXE_PERFORMANCE_STRING_LENGTH);
>>>> -  }
>>>> -  if (Module != NULL) {
>>>> -    AsciiStrnCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, Module, DXE_PERFORMANCE_STRING_LENGTH);
>>>> +  @param  Event    The event of notify protocol.
>>>> +  @param  Context  Notify event context.
>>>> +
>>>> +**/
>>>> +VOID
>>>> +EFIAPI
>>>> +ReportFpdtRecordBuffer (
>>>> +  IN EFI_EVENT     Event,
>>>> +  IN VOID          *Context
>>>> +  )
>>>> +{
>>>> +  EFI_STATUS      Status;
>>>> +  UINT64          BPDTAddr;
>>>> +
>>>> +  if (!mFpdtBufferIsReported) {
>>>> +    Status = AllocateBootPerformanceTable ();
>>>> +    if (!EFI_ERROR(Status)) {
>>>> +      BPDTAddr = (UINT64)(UINTN)mAcpiBootPerformanceTable;
>>>> +      REPORT_STATUS_CODE_EX (
>>>> +          EFI_PROGRESS_CODE,
>>>> +          EFI_SOFTWARE_DXE_BS_DRIVER,
>>>> +          0,
>>>> +          NULL,
>>>> +          &gEfiFirmwarePerformanceGuid,
>>>> +          &BPDTAddr,
>>>> +          sizeof (UINT64)
>>>> +          );
>>>> +    }
>>>> +    //
>>>> +    // Free Cached FPDT record Buffer
>>>> +    //
>>>> +    if (mPerformancePointer != NULL) {
>>>> +      FreePool (mPerformancePointer);
>>>> +      mPerformancePointer   = NULL;
>>>> +    }
>>>> +    mPerformanceLength    = 0;
>>>> +    mMaxPerformanceLength = 0;
>>>> +    //
>>>> +    // Set FPDT report state to TRUE.
>>>> +    //
>>>> +    mFpdtBufferIsReported = TRUE;
>>>>    }
>>>> +}
>>>>
>>>> -  GaugeEntryExArray[Index].EndTimeStamp = 0;
>>>> -  GaugeEntryExArray[Index].Identifier = Identifier;
>>>> +/**
>>>> +  Adds a record at the end of the performance measurement log
>>>> +  that records the start time of a performance measurement.
>>>>
>>>> -  if (TimeStamp == 0) {
>>>> -    TimeStamp = GetPerformanceCounter ();
>>>> -  }
>>>> -  GaugeEntryExArray[Index].StartTimeStamp = TimeStamp;
>>>> +  Adds a record to the end of the performance measurement log
>>>> +  that contains the Handle, Token, Module and Identifier.
>>>> +  The end time of the new record must be set to zero.
>>>> +  If TimeStamp is not zero, then TimeStamp is used to fill in the start time in the record.
>>>> +  If TimeStamp is zero, the start time in the record is filled in with the value
>>>> +  read from the current time stamp.
>>>>
>>>> -  mGaugeData->NumberOfEntries++;
>>>> +  @param  Handle                  Pointer to environment specific context used
>>>> +                                  to identify the component being measured.
>>>> +  @param  Token                   Pointer to a Null-terminated ASCII string
>>>> +                                  that identifies the component being measured.
>>>> +  @param  Module                  Pointer to a Null-terminated ASCII string
>>>> +                                  that identifies the module being measured.
>>>> +  @param  TimeStamp               64-bit time stamp.
>>>> +  @param  Identifier              32-bit identifier. If the value is 0, the created record
>>>> +                                  is same as the one created by StartGauge of PERFORMANCE_PROTOCOL.
>>>>
>>>> -  EfiReleaseLock (&mPerfRecordLock);
>>>> +  @retval EFI_SUCCESS             The data was read correctly from the device.
>>>> +  @retval EFI_OUT_OF_RESOURCES    There are not enough resources to record the measurement.
>>>>
>>>> -  return EFI_SUCCESS;
>>>> +**/
>>>> +EFI_STATUS
>>>> +EFIAPI
>>>> +StartGaugeEx (
>>>> +  IN CONST VOID   *Handle,  OPTIONAL
>>>> +  IN CONST CHAR8  *Token,   OPTIONAL
>>>> +  IN CONST CHAR8  *Module,  OPTIONAL
>>>> +  IN UINT64       TimeStamp,
>>>> +  IN UINT32       Identifier
>>>> +  )
>>>> +{
>>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>>>  }
>>>>
>>>>  /**
>>>>    Searches the performance measurement log from the beginning of the log
>>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>>>
>>>>    Searches the performance measurement log from the beginning of the log
>>>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>>>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>>>    If the record can not be found then return EFI_NOT_FOUND.
>>>>    If the record is found and TimeStamp is not zero,
>>>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>>>    is filled in with the current time stamp value.
>>>> @@ -260,89 +1188,19 @@ EndGaugeEx (
>>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>>    IN UINT64       TimeStamp,
>>>>    IN UINT32       Identifier
>>>>    )
>>>>  {
>>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>>>> -  UINT32              Index;
>>>> -  EFI_STATUS          Status;
>>>> -
>>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>>> -  if (EFI_ERROR (Status)) {
>>>> -    return Status;
>>>> -  }
>>>> -
>>>> -  if (TimeStamp == 0) {
>>>> -    TimeStamp = GetPerformanceCounter ();
>>>> -  }
>>>> -
>>>> -  Index = InternalSearchForGaugeEntry (Handle, Token, Module, Identifier);
>>>> -  if (Index >= mGaugeData->NumberOfEntries) {
>>>> -    EfiReleaseLock (&mPerfRecordLock);
>>>> -    return EFI_NOT_FOUND;
>>>> -  }
>>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>>> -  GaugeEntryExArray[Index].EndTimeStamp = TimeStamp;
>>>> -
>>>> -  EfiReleaseLock (&mPerfRecordLock);
>>>> -  return EFI_SUCCESS;
>>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>>>  }
>>>>
>>>>  /**
>>>>    Retrieves a previously logged performance measurement.
>>>>    It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>>>    and then assign the Identifier with 0.
>>>>
>>>> -  Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>>> -  If it stands for a valid entry, then EFI_SUCCESS is returned and
>>>> -  GaugeDataEntryEx stores the pointer to that entry.
>>>> -
>>>> -  This internal function is added to avoid releasing lock before each return statement.
>>>> -
>>>> -  @param  LogEntryKey             The key for the previous performance measurement log entry.
>>>> -                                  If 0, then the first performance measurement log entry is retrieved.
>>>> -  @param  GaugeDataEntryEx        The indirect pointer to the extended gauge data entry specified by LogEntryKey
>>>> -                                  if the retrieval is successful.
>>>> -
>>>> -  @retval EFI_SUCCESS             The GuageDataEntryEx is successfully found based on LogEntryKey.
>>>> -  @retval EFI_NOT_FOUND           The LogEntryKey is the last entry (equals to the total entry number).
>>>> -  @retval EFI_INVALIDE_PARAMETER  The LogEntryKey is not a valid entry (greater than the total entry number).
>>>> -  @retval EFI_INVALIDE_PARAMETER  GaugeDataEntryEx is NULL.
>>>> -
>>>> -**/
>>>> -EFI_STATUS
>>>> -EFIAPI
>>>> -InternalGetGaugeEx (
>>>> -  IN  UINTN                 LogEntryKey,
>>>> -  OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>>> -  )
>>>> -{
>>>> -  UINTN               NumberOfEntries;
>>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryExArray;
>>>> -
>>>> -  NumberOfEntries = (UINTN) (mGaugeData->NumberOfEntries);
>>>> -  if (LogEntryKey > NumberOfEntries) {
>>>> -    return EFI_INVALID_PARAMETER;
>>>> -  }
>>>> -  if (LogEntryKey == NumberOfEntries) {
>>>> -    return EFI_NOT_FOUND;
>>>> -  }
>>>> -
>>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>>> -
>>>> -  if (GaugeDataEntryEx == NULL) {
>>>> -    return EFI_INVALID_PARAMETER;
>>>> -  }
>>>> -  *GaugeDataEntryEx = &GaugeEntryExArray[LogEntryKey];
>>>> -
>>>> -  return EFI_SUCCESS;
>>>> -}
>>>> -
>>>> -/**
>>>> -  Retrieves a previously logged performance measurement.
>>>> -  It can also retrieve the log created by StartGauge and EndGauge of PERFORMANCE_PROTOCOL,
>>>> -  and then assign the Identifier with 0.
>>>> +    !!! Not support!!!
>>>>
>>>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>>>    GaugeDataEntryEx stores the pointer to that entry.
>>>>
>>>> @@ -362,22 +1220,11 @@ EFIAPI
>>>>  GetGaugeEx (
>>>>    IN  UINTN                 LogEntryKey,
>>>>    OUT GAUGE_DATA_ENTRY_EX   **GaugeDataEntryEx
>>>>    )
>>>>  {
>>>> -  EFI_STATUS                Status;
>>>> -
>>>> -  Status = EfiAcquireLockOrFail (&mPerfRecordLock);
>>>> -  if (EFI_ERROR (Status)) {
>>>> -    return Status;
>>>> -  }
>>>> -
>>>> -  Status = InternalGetGaugeEx (LogEntryKey, GaugeDataEntryEx);
>>>> -
>>>> -  EfiReleaseLock (&mPerfRecordLock);
>>>> -
>>>> -  return Status;
>>>> +  return EFI_UNSUPPORTED;
>>>>  }
>>>>
>>>>  /**
>>>>    Adds a record at the end of the performance measurement log
>>>>    that records the start time of a performance measurement.
>>>> @@ -452,10 +1299,12 @@ EndGauge (
>>>>  /**
>>>>    Retrieves a previously logged performance measurement.
>>>>    It can also retrieve the log created by StartGaugeEx and EndGaugeEx of PERFORMANCE_EX_PROTOCOL,
>>>>    and then eliminate the Identifier.
>>>>
>>>> +    !!! Not support!!!
>>>> +
>>>>    Retrieves the performance log entry from the performance log specified by LogEntryKey.
>>>>    If it stands for a valid entry, then EFI_SUCCESS is returned and
>>>>    GaugeDataEntry stores the pointer to that entry.
>>>>
>>>>    @param  LogEntryKey             The key for the previous performance measurement log entry.
>>>> @@ -474,81 +1323,13 @@ EFIAPI
>>>>  GetGauge (
>>>>    IN  UINTN               LogEntryKey,
>>>>    OUT GAUGE_DATA_ENTRY    **GaugeDataEntry
>>>>    )
>>>>  {
>>>> -  EFI_STATUS          Status;
>>>> -  GAUGE_DATA_ENTRY_EX *GaugeEntryEx;
>>>> -
>>>> -  GaugeEntryEx = NULL;
>>>> -
>>>> -  Status = GetGaugeEx (LogEntryKey, &GaugeEntryEx);
>>>> -  if (EFI_ERROR (Status)) {
>>>> -    return Status;
>>>> -  }
>>>> -
>>>> -  if (GaugeDataEntry == NULL) {
>>>> -    return EFI_INVALID_PARAMETER;
>>>> -  }
>>>> -
>>>> -  *GaugeDataEntry = (GAUGE_DATA_ENTRY *) GaugeEntryEx;
>>>> -
>>>> -  return EFI_SUCCESS;
>>>> +  return EFI_UNSUPPORTED;
>>>>  }
>>>>
>>>> -/**
>>>> -  Dumps all the PEI performance log to DXE performance gauge array.
>>>> -
>>>> -  This internal function dumps all the PEI performance log to the DXE performance gauge array.
>>>> -  It retrieves the optional GUID HOB for PEI performance and then saves the performance data
>>>> -  to DXE performance data structures.
>>>> -
>>>> -**/
>>>> -VOID
>>>> -InternalGetPeiPerformance (
>>>> -  VOID
>>>> -  )
>>>> -{
>>>> -  EFI_HOB_GUID_TYPE                 *GuidHob;
>>>> -  PEI_PERFORMANCE_LOG_HEADER        *LogHob;
>>>> -  PEI_PERFORMANCE_LOG_ENTRY         *LogEntryArray;
>>>> -  UINT32                            *LogIdArray;
>>>> -  GAUGE_DATA_ENTRY_EX               *GaugeEntryExArray;
>>>> -  UINT32                            Index;
>>>> -  UINT32                            NumberOfEntries;
>>>> -
>>>> -  NumberOfEntries = 0;
>>>> -  GaugeEntryExArray = (GAUGE_DATA_ENTRY_EX *) (mGaugeData + 1);
>>>> -
>>>> -  //
>>>> -  // Dump PEI Log Entries to DXE Guage Data structure.
>>>> -  //
>>>> -  GuidHob = GetFirstGuidHob (&gPerformanceProtocolGuid);
>>>> -  if (GuidHob != NULL) {
>>>> -    LogHob          = GET_GUID_HOB_DATA (GuidHob);
>>>> -    LogEntryArray   = (PEI_PERFORMANCE_LOG_ENTRY *) (LogHob + 1);
>>>> -
>>>> -    NumberOfEntries = LogHob->NumberOfEntries;
>>>> -    for (Index = 0; Index < NumberOfEntries; Index++) {
>>>> -      GaugeEntryExArray[Index].Handle         = LogEntryArray[Index].Handle;
>>>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Token,  DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Token);
>>>> -      AsciiStrCpyS (GaugeEntryExArray[Index].Module, DXE_PERFORMANCE_STRING_SIZE, LogEntryArray[Index].Module);
>>>> -      GaugeEntryExArray[Index].StartTimeStamp = LogEntryArray[Index].StartTimeStamp;
>>>> -      GaugeEntryExArray[Index].EndTimeStamp   = LogEntryArray[Index].EndTimeStamp;
>>>> -      GaugeEntryExArray[Index].Identifier     = 0;
>>>> -    }
>>>> -
>>>> -    GuidHob = GetFirstGuidHob (&gPerformanceExProtocolGuid);
>>>> -    if (GuidHob != NULL) {
>>>> -      LogIdArray    = GET_GUID_HOB_DATA (GuidHob);
>>>> -      for (Index = 0; Index < NumberOfEntries; Index++) {
>>>> -        GaugeEntryExArray[Index].Identifier   = LogIdArray[Index];
>>>> -      }
>>>> -    }
>>>> -  }
>>>> -  mGaugeData->NumberOfEntries = NumberOfEntries;
>>>> -}
>>>>
>>>>  /**
>>>>    The constructor function initializes Performance infrastructure for DXE phase.
>>>>
>>>>    The constructor function publishes Performance and PerformanceEx protocol, allocates memory to log DXE performance
>>>> @@ -567,40 +1348,53 @@ DxeCorePerformanceLibConstructor (
>>>>    IN EFI_HANDLE        ImageHandle,
>>>>    IN EFI_SYSTEM_TABLE  *SystemTable
>>>>    )
>>>>  {
>>>>    EFI_STATUS                Status;
>>>> +  EFI_HANDLE                Handle;
>>>> +  EFI_EVENT                 ReadyToBootEvent;
>>>>    PERFORMANCE_PROPERTY      *PerformanceProperty;
>>>>
>>>> -
>>>>    if (!PerformanceMeasurementEnabled ()) {
>>>>      //
>>>>      // Do not initialize performance infrastructure if not required.
>>>>      //
>>>>      return EFI_SUCCESS;
>>>>    }
>>>> +
>>>> +  //
>>>> +  // Dump normal PEI performance records
>>>> +  //
>>>> +  InternalGetPeiPerformance (GetHobList());
>>>> +
>>>>    //
>>>> -  // Install the protocol interfaces.
>>>> +  // Install the protocol interfaces for DXE performance library instance.
>>>>    //
>>>> +  Handle = NULL;
>>>>    Status = gBS->InstallMultipleProtocolInterfaces (
>>>> -                  &mHandle,
>>>> +                  &Handle,
>>>>                    &gPerformanceProtocolGuid,
>>>>                    &mPerformanceInterface,
>>>>                    &gPerformanceExProtocolGuid,
>>>>                    &mPerformanceExInterface,
>>>>                    NULL
>>>>                    );
>>>>    ASSERT_EFI_ERROR (Status);
>>>>
>>>> -  mMaxGaugeRecords = INIT_DXE_GAUGE_DATA_ENTRIES + (UINT16) (PcdGet16 (PcdMaxPeiPerformanceLogEntries16) != 0 ?
>>>> -                                                             PcdGet16 (PcdMaxPeiPerformanceLogEntries16) :
>>>> -                                                             PcdGet8 (PcdMaxPeiPerformanceLogEntries));
>>>> -
>>>> -  mGaugeData = AllocateZeroPool (sizeof (GAUGE_DATA_HEADER) + (sizeof (GAUGE_DATA_ENTRY_EX) * mMaxGaugeRecords));
>>>> -  ASSERT (mGaugeData != NULL);
>>>> +  //
>>>> +  // Register ReadyToBoot event to report StatusCode data
>>>> +  //
>>>> +  Status = gBS->CreateEventEx (
>>>> +                  EVT_NOTIFY_SIGNAL,
>>>> +                  TPL_CALLBACK,
>>>> +                  ReportFpdtRecordBuffer,
>>>> +                  NULL,
>>>> +                  &gEfiEventReadyToBootGuid,
>>>> +                  &ReadyToBootEvent
>>>> +                  );
>>>>
>>>> -  InternalGetPeiPerformance ();
>>>> +  ASSERT_EFI_ERROR (Status);
>>>>
>>>>    Status = EfiGetSystemConfigurationTable (&gPerformanceProtocolGuid, (VOID **) &PerformanceProperty);
>>>>    if (EFI_ERROR (Status)) {
>>>>      //
>>>>      // Install configuration table for performance property.
>>>> @@ -651,19 +1445,19 @@ StartPerformanceMeasurementEx (
>>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>>    IN UINT64       TimeStamp,
>>>>    IN UINT32       Identifier
>>>>    )
>>>>  {
>>>> -  return (RETURN_STATUS) StartGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, Identifier);
>>>>  }
>>>>
>>>>  /**
>>>>    Searches the performance measurement log from the beginning of the log
>>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>>>
>>>>    Searches the performance measurement log from the beginning of the log
>>>> -  for the first record that matches Handle, Token and Module and has an end time value of zero.
>>>> +  for the first record that matches Handle, Token, Module and Identifier and has an end time value of zero.
>>>>    If the record can not be found then return RETURN_NOT_FOUND.
>>>>    If the record is found and TimeStamp is not zero,
>>>>    then the end time in the record is filled in with the value specified by TimeStamp.
>>>>    If the record is found and TimeStamp is zero, then the end time in the matching record
>>>>    is filled in with the current time stamp value.
>>>> @@ -690,18 +1484,20 @@ EndPerformanceMeasurementEx (
>>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>>    IN UINT64       TimeStamp,
>>>>    IN UINT32       Identifier
>>>>    )
>>>>  {
>>>> -  return (RETURN_STATUS) EndGaugeEx (Handle, Token, Module, TimeStamp, Identifier);
>>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, Identifier);
>>>>  }
>>>>
>>>>  /**
>>>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>>>    It can also retrieve the log created by StartPerformanceMeasurement and EndPerformanceMeasurement,
>>>>    and then assign the Identifier with 0.
>>>>
>>>> +    !!! Not support!!!
>>>> +
>>>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>>>> @@ -729,63 +1525,29 @@ EndPerformanceMeasurementEx (
>>>>                                    being measured.
>>>>    @param  StartTimeStamp          Pointer to the 64-bit time stamp that was recorded when the measurement
>>>>                                    was started.
>>>>    @param  EndTimeStamp            Pointer to the 64-bit time stamp that was recorded when the measurement
>>>>                                    was ended.
>>>> -  @param  Identifier              Pointer to the 32-bit identifier that was recorded.
>>>> +  @param  Identifier              Pointer to the 32-bit identifier that was recorded when the measurement
>>>> +                                  was ended.
>>>>
>>>>    @return The key for the next performance log entry (in general case).
>>>>
>>>>  **/
>>>>  UINTN
>>>>  EFIAPI
>>>>  GetPerformanceMeasurementEx (
>>>> -  IN  UINTN       LogEntryKey,
>>>> +  IN  UINTN       LogEntryKey,
>>>>    OUT CONST VOID  **Handle,
>>>>    OUT CONST CHAR8 **Token,
>>>>    OUT CONST CHAR8 **Module,
>>>>    OUT UINT64      *StartTimeStamp,
>>>>    OUT UINT64      *EndTimeStamp,
>>>>    OUT UINT32      *Identifier
>>>>    )
>>>>  {
>>>> -  EFI_STATUS           Status;
>>>> -  GAUGE_DATA_ENTRY_EX  *GaugeData;
>>>> -
>>>> -  GaugeData = NULL;
>>>> -
>>>> -  ASSERT (Handle != NULL);
>>>> -  ASSERT (Token != NULL);
>>>> -  ASSERT (Module != NULL);
>>>> -  ASSERT (StartTimeStamp != NULL);
>>>> -  ASSERT (EndTimeStamp != NULL);
>>>> -  ASSERT (Identifier != NULL);
>>>> -
>>>> -  Status = GetGaugeEx (LogEntryKey++, &GaugeData);
>>>> -
>>>> -  //
>>>> -  // Make sure that LogEntryKey is a valid log entry key,
>>>> -  //
>>>> -  ASSERT (Status != EFI_INVALID_PARAMETER);
>>>> -
>>>> -  if (EFI_ERROR (Status)) {
>>>> -    //
>>>> -    // The LogEntryKey is the last entry (equals to the total entry number).
>>>> -    //
>>>> -    return 0;
>>>> -  }
>>>> -
>>>> -  ASSERT (GaugeData != NULL);
>>>> -
>>>> -  *Handle         = (VOID *) (UINTN) GaugeData->Handle;
>>>> -  *Token          = GaugeData->Token;
>>>> -  *Module         = GaugeData->Module;
>>>> -  *StartTimeStamp = GaugeData->StartTimeStamp;
>>>> -  *EndTimeStamp   = GaugeData->EndTimeStamp;
>>>> -  *Identifier     = GaugeData->Identifier;
>>>> -
>>>> -  return LogEntryKey;
>>>> +  return 0;
>>>>  }
>>>>
>>>>  /**
>>>>    Adds a record at the end of the performance measurement log
>>>>    that records the start time of a performance measurement.
>>>> @@ -816,11 +1578,11 @@ StartPerformanceMeasurement (
>>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>>    IN UINT64       TimeStamp
>>>>    )
>>>>  {
>>>> -  return StartPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>>>> +  return InsertFpdtMeasurement (TRUE, Handle, Token, Module, TimeStamp, 0);
>>>>  }
>>>>
>>>>  /**
>>>>    Searches the performance measurement log from the beginning of the log
>>>>    for the first matching record that contains a zero end time and fills in a valid end time.
>>>> @@ -852,18 +1614,20 @@ EndPerformanceMeasurement (
>>>>    IN CONST CHAR8  *Token,   OPTIONAL
>>>>    IN CONST CHAR8  *Module,  OPTIONAL
>>>>    IN UINT64       TimeStamp
>>>>    )
>>>>  {
>>>> -  return EndPerformanceMeasurementEx (Handle, Token, Module, TimeStamp, 0);
>>>> +  return InsertFpdtMeasurement (FALSE, Handle, Token, Module, TimeStamp, 0);
>>>>  }
>>>>
>>>>  /**
>>>>    Attempts to retrieve a performance measurement log entry from the performance measurement log.
>>>>    It can also retrieve the log created by StartPerformanceMeasurementEx and EndPerformanceMeasurementEx,
>>>>    and then eliminate the Identifier.
>>>>
>>>> +  !!! Not support!!!
>>>> +
>>>>    Attempts to retrieve the performance log entry specified by LogEntryKey.  If LogEntryKey is
>>>>    zero on entry, then an attempt is made to retrieve the first entry from the performance log,
>>>>    and the key for the second entry in the log is returned.  If the performance log is empty,
>>>>    then no entry is retrieved and zero is returned.  If LogEntryKey is not zero, then the performance
>>>>    log entry associated with LogEntryKey is retrieved, and the key for the next entry in the log is
>>>> @@ -905,12 +1669,11 @@ GetPerformanceMeasurement (
>>>>    OUT CONST CHAR8 **Module,
>>>>    OUT UINT64      *StartTimeStamp,
>>>>    OUT UINT64      *EndTimeStamp
>>>>    )
>>>>  {
>>>> -  UINT32 Identifier;
>>>> -  return GetPerformanceMeasurementEx (LogEntryKey, Handle, Token, Module, StartTimeStamp, EndTimeStamp, &Identifier);
>>>> +  return 0;
>>>>  }
>>>>
>>>>  /**
>>>>    Returns TRUE if the performance measurement macros are enabled.
>>>>
>>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>>> index 5b89ce2..71c181f 100644
>>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLib.inf
>>>> @@ -7,11 +7,11 @@
>>>>  #  It initializes DXE phase performance logging by publishing the Performance and PerformanceEx Protocol,
>>>>  #  which is consumed by DxePerformanceLib to logging performance data in DXE phase.
>>>>  #  This library is mainly used by DxeCore to start performance logging to ensure that
>>>>  #  Performance and PerformanceEx Protocol are installed at the very beginning of DXE phase.
>>>>  #
>>>> -#  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>>> +#  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>>  # (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
>>>>  #  This program and the accompanying materials
>>>>  #  are licensed and made available under the terms and conditions of the BSD License
>>>>  #  which accompanies this distribution.  The full text of the license may be found at
>>>>  #  http://opensource.org/licenses/bsd-license.php
>>>> @@ -48,27 +48,39 @@
>>>>
>>>>
>>>>  [LibraryClasses]
>>>>    MemoryAllocationLib
>>>>    UefiBootServicesTableLib
>>>> +  UefiRuntimeServicesTableLib
>>>>    PcdLib
>>>>    TimerLib
>>>>    BaseMemoryLib
>>>>    BaseLib
>>>>    HobLib
>>>>    DebugLib
>>>>    UefiLib
>>>> +  ReportStatusCodeLib
>>>> +  DxeServicesLib
>>>> +  PeCoffGetEntryPointLib
>>>> +
>>>> +[Protocols]
>>>> +  gEfiSmmCommunicationProtocolGuid              ## SOMETIMES_CONSUMES
>>>>
>>>>
>>>>  [Guids]
>>>>    ## SOMETIMES_CONSUMES   ## HOB
>>>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>>>    ## PRODUCES             ## SystemTable
>>>>    gPerformanceProtocolGuid
>>>>    ## SOMETIMES_CONSUMES   ## HOB
>>>>    ## PRODUCES             ## UNDEFINED # Install protocol
>>>>    gPerformanceExProtocolGuid
>>>> +  gZeroGuid                                     ## SOMETIMES_CONSUMES ## GUID
>>>> +  gEfiFirmwarePerformanceGuid                   ## SOMETIMES_PRODUCES ## UNDEFINED # StatusCode Data
>>>> +  gEdkiiExtendedFirmwarePerformanceGuid         ## SOMETIMES_CONSUMES ## HOB # StatusCode Data
>>>> +  gEfiEventReadyToBootGuid                      ## CONSUMES           ## Event
>>>> +  gEdkiiPiSmmCommunicationRegionTableGuid       ## SOMETIMES_CONSUMES    ## SystemTable
>>>>
>>>>  [Pcd]
>>>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries   ## CONSUMES
>>>> -  gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries16 ## CONSUMES
>>>> -  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask      ## CONSUMES
>>>> +  gEfiMdePkgTokenSpaceGuid.PcdPerformanceLibraryPropertyMask         ## CONSUMES
>>>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdEdkiiFpdtStringRecordEnableOnly  ## CONSUMES
>>>> +  gEfiMdeModulePkgTokenSpaceGuid.PcdExtFpdtBootRecordPadSize         ## CONSUMES
>>>> diff --git a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>>> index f1540d8..7e79675 100644
>>>> --- a/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>>> +++ b/MdeModulePkg/Library/DxeCorePerformanceLib/DxeCorePerformanceLibInternal.h
>>>> @@ -2,11 +2,11 @@
>>>>    Master header files for DxeCorePerformanceLib instance.
>>>>
>>>>    This header file holds the prototypes of the Performance and PerformanceEx Protocol published by this
>>>>    library instance at its constructor.
>>>>
>>>> -Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
>>>> +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
>>>>  This program and the accompanying materials
>>>>  are licensed and made available under the terms and conditions of the BSD License
>>>>  which accompanies this distribution.  The full text of the license may be found at
>>>>  http://opensource.org/licenses/bsd-license.php
>>>>
>>>> @@ -20,21 +20,36 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
>>>>
>>>>
>>>>  #include <PiDxe.h>
>>>>
>>>>  #include <Guid/Performance.h>
>>>> +#include <Guid/ExtendedFirmwarePerformance.h>
>>>> +#include <Guid/ZeroGuid.h>
>>>> +#include <Guid/EventGroup.h>
>>>> +#include <Guid/FirmwarePerformance.h>
>>>> +#include <Guid/PiSmmCommunicationRegionTable.h>
>>>> +
>>>> +#include <Protocol/DriverBinding.h>
>>>> +#include <Protocol/LoadedImage.h>
>>>> +#include <Protocol/ComponentName2.h>
>>>> +#include <Protocol/DevicePathToText.h>
>>>> +#include <Protocol/SmmCommunication.h>
>>>>
>>>>  #include <Library/PerformanceLib.h>
>>>>  #include <Library/DebugLib.h>
>>>>  #include <Library/HobLib.h>
>>>>  #include <Library/BaseLib.h>
>>>>  #include <Library/BaseMemoryLib.h>
>>>>  #include <Library/TimerLib.h>
>>>>  #include <Library/PcdLib.h>
>>>>  #include <Library/UefiBootServicesTableLib.h>
>>>> +#include <Library/UefiRuntimeServicesTableLib.h>
>>>>  #include <Library/MemoryAllocationLib.h>
>>>>  #include <Library/UefiLib.h>
>>>> +#include <Library/ReportStatusCodeLib.h>
>>>> +#include <Library/DxeServicesLib.h>
>>>> +#include <Library/PeCoffGetEntryPointLib.h>
>>>>
>>>>  //
>>>>  // Interface declarations for PerformanceEx Protocol.
>>>>  //
>>>>  /**
>>>> --
>>>> 1.9.5.msysgit.1
>>>>
>>>> _______________________________________________
>>>> edk2-devel mailing list
>>>> edk2-devel@lists.01.org
>>>> https://lists.01.org/mailman/listinfo/edk2-devel
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