UefiCpuPkg/Library/MpInitLib/Microcode.c | 10 +++------- UefiCpuPkg/Library/MpInitLib/MpLib.c | 2 ++ UefiCpuPkg/Library/MpInitLib/MpLib.h | 2 ++ 3 files changed, 7 insertions(+), 7 deletions(-)
MicrocodeDetect function will run by every threads, and it will
use PcdGet to get PcdCpuMicrocodePatchAddress and
PcdCpuMicrocodePatchRegionSize, if change both PCD default to dynamic,
system will in non-deterministic behavior.
By design, UEFI/PI services are single threaded and not re-entrant
so Multi processor code should not use UEFI/PI services. Here, Pcd
protocol/PPI is used to access dynamic PCDs so it would result in
non-deterministic behavior.
This code get PCD value in BSP and save them in CPU_MP_DATA for Ap.
https://bugzilla.tianocore.org/show_bug.cgi?id=726
Cc: Crystal Lee <CrystalLee@ami.com.tw>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Eric Dong <eric.dong@intel.com>
---
UefiCpuPkg/Library/MpInitLib/Microcode.c | 10 +++-------
UefiCpuPkg/Library/MpInitLib/MpLib.c | 2 ++
UefiCpuPkg/Library/MpInitLib/MpLib.h | 2 ++
3 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/UefiCpuPkg/Library/MpInitLib/Microcode.c b/UefiCpuPkg/Library/MpInitLib/Microcode.c
index 982995b..35f66f7 100644
--- a/UefiCpuPkg/Library/MpInitLib/Microcode.c
+++ b/UefiCpuPkg/Library/MpInitLib/Microcode.c
@@ -42,8 +42,6 @@ MicrocodeDetect (
IN CPU_MP_DATA *CpuMpData
)
{
- UINT64 MicrocodePatchAddress;
- UINT64 MicrocodePatchRegionSize;
UINT32 ExtendedTableLength;
UINT32 ExtendedTableCount;
CPU_MICROCODE_EXTENDED_TABLE *ExtendedTable;
@@ -61,9 +59,7 @@ MicrocodeDetect (
VOID *MicrocodeData;
MSR_IA32_PLATFORM_ID_REGISTER PlatformIdMsr;
- MicrocodePatchAddress = PcdGet64 (PcdCpuMicrocodePatchAddress);
- MicrocodePatchRegionSize = PcdGet64 (PcdCpuMicrocodePatchRegionSize);
- if (MicrocodePatchRegionSize == 0) {
+ if (CpuMpData->MicrocodePatchRegionSize == 0) {
//
// There is no microcode patches
//
@@ -93,8 +89,8 @@ MicrocodeDetect (
LatestRevision = 0;
MicrocodeData = NULL;
- MicrocodeEnd = (UINTN) (MicrocodePatchAddress + MicrocodePatchRegionSize);
- MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN) MicrocodePatchAddress;
+ MicrocodeEnd = (UINTN) (CpuMpData->MicrocodePatchAddress + CpuMpData->MicrocodePatchRegionSize);
+ MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN) CpuMpData->MicrocodePatchAddress;
do {
//
// Check if the microcode is for the Cpu and the version is newer
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 924b909..f3ee6d4 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1458,6 +1458,8 @@ MpInitLibInitialize (
CpuMpData->SwitchBspFlag = FALSE;
CpuMpData->CpuData = (CPU_AP_DATA *) (CpuMpData + 1);
CpuMpData->CpuInfoInHob = (UINT64) (UINTN) (CpuMpData->CpuData + MaxLogicalProcessorNumber);
+ CpuMpData->MicrocodePatchAddress = PcdGet64 (PcdCpuMicrocodePatchAddress);
+ CpuMpData->MicrocodePatchRegionSize = PcdGet64 (PcdCpuMicrocodePatchRegionSize);
InitializeSpinLock(&CpuMpData->MpLock);
//
// Save BSP's Control registers to APs
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h b/UefiCpuPkg/Library/MpInitLib/MpLib.h
index 19defda..84ae24f 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
@@ -233,6 +233,8 @@ struct _CPU_MP_DATA {
UINT8 Vector;
BOOLEAN PeriodicMode;
BOOLEAN TimerInterruptState;
+ UINT64 MicrocodePatchAddress;
+ UINT64 MicrocodePatchRegionSize;
};
extern EFI_GUID mCpuInitMpLibHobGuid;
--
2.7.0.windows.1
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On 10/19/17 04:42, Eric Dong wrote:
> MicrocodeDetect function will run by every threads, and it will
> use PcdGet to get PcdCpuMicrocodePatchAddress and
> PcdCpuMicrocodePatchRegionSize, if change both PCD default to dynamic,
> system will in non-deterministic behavior.
>
> By design, UEFI/PI services are single threaded and not re-entrant
> so Multi processor code should not use UEFI/PI services. Here, Pcd
> protocol/PPI is used to access dynamic PCDs so it would result in
> non-deterministic behavior.
>
> This code get PCD value in BSP and save them in CPU_MP_DATA for Ap.
>
> https://bugzilla.tianocore.org/show_bug.cgi?id=726
>
> Cc: Crystal Lee <CrystalLee@ami.com.tw>
> Cc: Ruiyu Ni <ruiyu.ni@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Eric Dong <eric.dong@intel.com>
> ---
> UefiCpuPkg/Library/MpInitLib/Microcode.c | 10 +++-------
> UefiCpuPkg/Library/MpInitLib/MpLib.c | 2 ++
> UefiCpuPkg/Library/MpInitLib/MpLib.h | 2 ++
> 3 files changed, 7 insertions(+), 7 deletions(-)
Eric, can you please fix up the subject line after you get an R-b and
are about to push the patch?
-UefiCpuPkg/MpInitLib: Avoid call PcdGe* in Ap & Bsp.
+UefiCpuPkg/MpInitLib: Avoid call PcdGet* in Ap & Bsp.
Thanks!
Laszlo
> diff --git a/UefiCpuPkg/Library/MpInitLib/Microcode.c b/UefiCpuPkg/Library/MpInitLib/Microcode.c
> index 982995b..35f66f7 100644
> --- a/UefiCpuPkg/Library/MpInitLib/Microcode.c
> +++ b/UefiCpuPkg/Library/MpInitLib/Microcode.c
> @@ -42,8 +42,6 @@ MicrocodeDetect (
> IN CPU_MP_DATA *CpuMpData
> )
> {
> - UINT64 MicrocodePatchAddress;
> - UINT64 MicrocodePatchRegionSize;
> UINT32 ExtendedTableLength;
> UINT32 ExtendedTableCount;
> CPU_MICROCODE_EXTENDED_TABLE *ExtendedTable;
> @@ -61,9 +59,7 @@ MicrocodeDetect (
> VOID *MicrocodeData;
> MSR_IA32_PLATFORM_ID_REGISTER PlatformIdMsr;
>
> - MicrocodePatchAddress = PcdGet64 (PcdCpuMicrocodePatchAddress);
> - MicrocodePatchRegionSize = PcdGet64 (PcdCpuMicrocodePatchRegionSize);
> - if (MicrocodePatchRegionSize == 0) {
> + if (CpuMpData->MicrocodePatchRegionSize == 0) {
> //
> // There is no microcode patches
> //
> @@ -93,8 +89,8 @@ MicrocodeDetect (
>
> LatestRevision = 0;
> MicrocodeData = NULL;
> - MicrocodeEnd = (UINTN) (MicrocodePatchAddress + MicrocodePatchRegionSize);
> - MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN) MicrocodePatchAddress;
> + MicrocodeEnd = (UINTN) (CpuMpData->MicrocodePatchAddress + CpuMpData->MicrocodePatchRegionSize);
> + MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN) CpuMpData->MicrocodePatchAddress;
> do {
> //
> // Check if the microcode is for the Cpu and the version is newer
> diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> index 924b909..f3ee6d4 100644
> --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
> +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> @@ -1458,6 +1458,8 @@ MpInitLibInitialize (
> CpuMpData->SwitchBspFlag = FALSE;
> CpuMpData->CpuData = (CPU_AP_DATA *) (CpuMpData + 1);
> CpuMpData->CpuInfoInHob = (UINT64) (UINTN) (CpuMpData->CpuData + MaxLogicalProcessorNumber);
> + CpuMpData->MicrocodePatchAddress = PcdGet64 (PcdCpuMicrocodePatchAddress);
> + CpuMpData->MicrocodePatchRegionSize = PcdGet64 (PcdCpuMicrocodePatchRegionSize);
> InitializeSpinLock(&CpuMpData->MpLock);
> //
> // Save BSP's Control registers to APs
> diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h b/UefiCpuPkg/Library/MpInitLib/MpLib.h
> index 19defda..84ae24f 100644
> --- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
> +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
> @@ -233,6 +233,8 @@ struct _CPU_MP_DATA {
> UINT8 Vector;
> BOOLEAN PeriodicMode;
> BOOLEAN TimerInterruptState;
> + UINT64 MicrocodePatchAddress;
> + UINT64 MicrocodePatchRegionSize;
> };
>
> extern EFI_GUID mCpuInitMpLibHobGuid;
>
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With the subject change suggested by Laszlo, Reviewed-by: Ruiyu Ni <Ruiyu.ni@Intel.com>
Thanks/Ray
> -----Original Message-----
> From: Laszlo Ersek [mailto:lersek@redhat.com]
> Sent: Thursday, October 19, 2017 4:08 PM
> To: Dong, Eric <eric.dong@intel.com>; edk2-devel@lists.01.org
> Cc: Ni, Ruiyu <ruiyu.ni@intel.com>; Crystal Lee <CrystalLee@ami.com.tw>
> Subject: Re: [edk2] [Patch] UefiCpuPkg/MpInitLib: Avoid call PcdGe* in Ap &
> Bsp.
>
> On 10/19/17 04:42, Eric Dong wrote:
> > MicrocodeDetect function will run by every threads, and it will use
> > PcdGet to get PcdCpuMicrocodePatchAddress and
> > PcdCpuMicrocodePatchRegionSize, if change both PCD default to dynamic,
> > system will in non-deterministic behavior.
> >
> > By design, UEFI/PI services are single threaded and not re-entrant so
> > Multi processor code should not use UEFI/PI services. Here, Pcd
> > protocol/PPI is used to access dynamic PCDs so it would result in
> > non-deterministic behavior.
> >
> > This code get PCD value in BSP and save them in CPU_MP_DATA for Ap.
> >
> > https://bugzilla.tianocore.org/show_bug.cgi?id=726
> >
> > Cc: Crystal Lee <CrystalLee@ami.com.tw>
> > Cc: Ruiyu Ni <ruiyu.ni@intel.com>
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Eric Dong <eric.dong@intel.com>
> > ---
> > UefiCpuPkg/Library/MpInitLib/Microcode.c | 10 +++-------
> > UefiCpuPkg/Library/MpInitLib/MpLib.c | 2 ++
> > UefiCpuPkg/Library/MpInitLib/MpLib.h | 2 ++
> > 3 files changed, 7 insertions(+), 7 deletions(-)
>
> Eric, can you please fix up the subject line after you get an R-b and are about
> to push the patch?
>
> -UefiCpuPkg/MpInitLib: Avoid call PcdGe* in Ap & Bsp.
> +UefiCpuPkg/MpInitLib: Avoid call PcdGet* in Ap & Bsp.
>
> Thanks!
> Laszlo
>
>
> > diff --git a/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > b/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > index 982995b..35f66f7 100644
> > --- a/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > +++ b/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > @@ -42,8 +42,6 @@ MicrocodeDetect (
> > IN CPU_MP_DATA *CpuMpData
> > )
> > {
> > - UINT64 MicrocodePatchAddress;
> > - UINT64 MicrocodePatchRegionSize;
> > UINT32 ExtendedTableLength;
> > UINT32 ExtendedTableCount;
> > CPU_MICROCODE_EXTENDED_TABLE *ExtendedTable;
> > @@ -61,9 +59,7 @@ MicrocodeDetect (
> > VOID *MicrocodeData;
> > MSR_IA32_PLATFORM_ID_REGISTER PlatformIdMsr;
> >
> > - MicrocodePatchAddress = PcdGet64 (PcdCpuMicrocodePatchAddress);
> > - MicrocodePatchRegionSize = PcdGet64
> > (PcdCpuMicrocodePatchRegionSize);
> > - if (MicrocodePatchRegionSize == 0) {
> > + if (CpuMpData->MicrocodePatchRegionSize == 0) {
> > //
> > // There is no microcode patches
> > //
> > @@ -93,8 +89,8 @@ MicrocodeDetect (
> >
> > LatestRevision = 0;
> > MicrocodeData = NULL;
> > - MicrocodeEnd = (UINTN) (MicrocodePatchAddress +
> > MicrocodePatchRegionSize);
> > - MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN)
> > MicrocodePatchAddress;
> > + MicrocodeEnd = (UINTN) (CpuMpData->MicrocodePatchAddress +
> > + CpuMpData->MicrocodePatchRegionSize);
> > + MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN)
> > + CpuMpData->MicrocodePatchAddress;
> > do {
> > //
> > // Check if the microcode is for the Cpu and the version is newer
> > diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > index 924b909..f3ee6d4 100644
> > --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > @@ -1458,6 +1458,8 @@ MpInitLibInitialize (
> > CpuMpData->SwitchBspFlag = FALSE;
> > CpuMpData->CpuData = (CPU_AP_DATA *) (CpuMpData + 1);
> > CpuMpData->CpuInfoInHob = (UINT64) (UINTN) (CpuMpData-
> >CpuData + MaxLogicalProcessorNumber);
> > + CpuMpData->MicrocodePatchAddress = PcdGet64
> (PcdCpuMicrocodePatchAddress);
> > + CpuMpData->MicrocodePatchRegionSize = PcdGet64
> > + (PcdCpuMicrocodePatchRegionSize);
> > InitializeSpinLock(&CpuMpData->MpLock);
> > //
> > // Save BSP's Control registers to APs diff --git
> > a/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > b/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > index 19defda..84ae24f 100644
> > --- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > @@ -233,6 +233,8 @@ struct _CPU_MP_DATA {
> > UINT8 Vector;
> > BOOLEAN PeriodicMode;
> > BOOLEAN TimerInterruptState;
> > + UINT64 MicrocodePatchAddress;
> > + UINT64 MicrocodePatchRegionSize;
> > };
> >
> > extern EFI_GUID mCpuInitMpLibHobGuid;
> >
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Hi Laszlo & Ruiyu,
I have fix the typo and push the change. Thanks.
Thanks,
Eric
> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Thursday, October 19, 2017 5:23 PM
> To: Laszlo Ersek <lersek@redhat.com>; Dong, Eric <eric.dong@intel.com>;
> edk2-devel@lists.01.org
> Cc: Crystal Lee <CrystalLee@ami.com.tw>
> Subject: RE: [edk2] [Patch] UefiCpuPkg/MpInitLib: Avoid call PcdGe* in Ap &
> Bsp.
>
> With the subject change suggested by Laszlo, Reviewed-by: Ruiyu Ni
> <Ruiyu.ni@Intel.com>
>
> Thanks/Ray
>
> > -----Original Message-----
> > From: Laszlo Ersek [mailto:lersek@redhat.com]
> > Sent: Thursday, October 19, 2017 4:08 PM
> > To: Dong, Eric <eric.dong@intel.com>; edk2-devel@lists.01.org
> > Cc: Ni, Ruiyu <ruiyu.ni@intel.com>; Crystal Lee
> > <CrystalLee@ami.com.tw>
> > Subject: Re: [edk2] [Patch] UefiCpuPkg/MpInitLib: Avoid call PcdGe* in
> > Ap & Bsp.
> >
> > On 10/19/17 04:42, Eric Dong wrote:
> > > MicrocodeDetect function will run by every threads, and it will use
> > > PcdGet to get PcdCpuMicrocodePatchAddress and
> > > PcdCpuMicrocodePatchRegionSize, if change both PCD default to
> > > dynamic, system will in non-deterministic behavior.
> > >
> > > By design, UEFI/PI services are single threaded and not re-entrant
> > > so Multi processor code should not use UEFI/PI services. Here, Pcd
> > > protocol/PPI is used to access dynamic PCDs so it would result in
> > > non-deterministic behavior.
> > >
> > > This code get PCD value in BSP and save them in CPU_MP_DATA for Ap.
> > >
> > > https://bugzilla.tianocore.org/show_bug.cgi?id=726
> > >
> > > Cc: Crystal Lee <CrystalLee@ami.com.tw>
> > > Cc: Ruiyu Ni <ruiyu.ni@intel.com>
> > > Contributed-under: TianoCore Contribution Agreement 1.1
> > > Signed-off-by: Eric Dong <eric.dong@intel.com>
> > > ---
> > > UefiCpuPkg/Library/MpInitLib/Microcode.c | 10 +++-------
> > > UefiCpuPkg/Library/MpInitLib/MpLib.c | 2 ++
> > > UefiCpuPkg/Library/MpInitLib/MpLib.h | 2 ++
> > > 3 files changed, 7 insertions(+), 7 deletions(-)
> >
> > Eric, can you please fix up the subject line after you get an R-b and
> > are about to push the patch?
> >
> > -UefiCpuPkg/MpInitLib: Avoid call PcdGe* in Ap & Bsp.
> > +UefiCpuPkg/MpInitLib: Avoid call PcdGet* in Ap & Bsp.
> >
> > Thanks!
> > Laszlo
> >
> >
> > > diff --git a/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > > b/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > > index 982995b..35f66f7 100644
> > > --- a/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > > +++ b/UefiCpuPkg/Library/MpInitLib/Microcode.c
> > > @@ -42,8 +42,6 @@ MicrocodeDetect (
> > > IN CPU_MP_DATA *CpuMpData
> > > )
> > > {
> > > - UINT64 MicrocodePatchAddress;
> > > - UINT64 MicrocodePatchRegionSize;
> > > UINT32 ExtendedTableLength;
> > > UINT32 ExtendedTableCount;
> > > CPU_MICROCODE_EXTENDED_TABLE *ExtendedTable;
> > > @@ -61,9 +59,7 @@ MicrocodeDetect (
> > > VOID *MicrocodeData;
> > > MSR_IA32_PLATFORM_ID_REGISTER PlatformIdMsr;
> > >
> > > - MicrocodePatchAddress = PcdGet64
> (PcdCpuMicrocodePatchAddress);
> > > - MicrocodePatchRegionSize = PcdGet64
> > > (PcdCpuMicrocodePatchRegionSize);
> > > - if (MicrocodePatchRegionSize == 0) {
> > > + if (CpuMpData->MicrocodePatchRegionSize == 0) {
> > > //
> > > // There is no microcode patches
> > > //
> > > @@ -93,8 +89,8 @@ MicrocodeDetect (
> > >
> > > LatestRevision = 0;
> > > MicrocodeData = NULL;
> > > - MicrocodeEnd = (UINTN) (MicrocodePatchAddress +
> > > MicrocodePatchRegionSize);
> > > - MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN)
> > > MicrocodePatchAddress;
> > > + MicrocodeEnd = (UINTN) (CpuMpData->MicrocodePatchAddress +
> > > + CpuMpData->MicrocodePatchRegionSize);
> > > + MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN)
> > > + CpuMpData->MicrocodePatchAddress;
> > > do {
> > > //
> > > // Check if the microcode is for the Cpu and the version is
> > > newer diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > > b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > > index 924b909..f3ee6d4 100644
> > > --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > > +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> > > @@ -1458,6 +1458,8 @@ MpInitLibInitialize (
> > > CpuMpData->SwitchBspFlag = FALSE;
> > > CpuMpData->CpuData = (CPU_AP_DATA *) (CpuMpData + 1);
> > > CpuMpData->CpuInfoInHob = (UINT64) (UINTN) (CpuMpData-
> > >CpuData + MaxLogicalProcessorNumber);
> > > + CpuMpData->MicrocodePatchAddress = PcdGet64
> > (PcdCpuMicrocodePatchAddress);
> > > + CpuMpData->MicrocodePatchRegionSize = PcdGet64
> > > + (PcdCpuMicrocodePatchRegionSize);
> > > InitializeSpinLock(&CpuMpData->MpLock);
> > > //
> > > // Save BSP's Control registers to APs diff --git
> > > a/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > > b/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > > index 19defda..84ae24f 100644
> > > --- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > > +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
> > > @@ -233,6 +233,8 @@ struct _CPU_MP_DATA {
> > > UINT8 Vector;
> > > BOOLEAN PeriodicMode;
> > > BOOLEAN TimerInterruptState;
> > > + UINT64 MicrocodePatchAddress;
> > > + UINT64 MicrocodePatchRegionSize;
> > > };
> > >
> > > extern EFI_GUID mCpuInitMpLibHobGuid;
> > >
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