UefiCpuPkg/CpuDxe/CpuPageTable.c | 69 +++++++++++++++++++++++++++++----------- 1 file changed, 50 insertions(+), 19 deletions(-)
> v4:
> a. Remove DoUpdate and check attributes mismatch all the time to avoid
> a logic hole
> b. Add warning message if failed to update capability
> c. Add local variable to hold new attributes to make code cleaner
> v3:
> a. Add comment to explain more on updating memory capabilities
> b. Fix logic hole in updating attributes
> c. Instead of checking illegal memory space address and size, use return
> status of gDS->SetMemorySpaceCapabilities() to skip memory block which
> cannot be updated with new capabilities.
> v2
> a. Fix an issue which will cause setting capability failure if size is smaller
> than a page.
More than one entry of RT_CODE memory might cause boot problem for some
old OSs. This patch will fix this issue to keep OS compatibility as much
as possible.
More detailed information, please refer to
https://bugzilla.tianocore.org/show_bug.cgi?id=753
Cc: Eric Dong <eric.dong@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
---
UefiCpuPkg/CpuDxe/CpuPageTable.c | 69 +++++++++++++++++++++++++++++-----------
1 file changed, 50 insertions(+), 19 deletions(-)
diff --git a/UefiCpuPkg/CpuDxe/CpuPageTable.c b/UefiCpuPkg/CpuDxe/CpuPageTable.c
index d312eb66f8..a1d804caed 100644
--- a/UefiCpuPkg/CpuDxe/CpuPageTable.c
+++ b/UefiCpuPkg/CpuDxe/CpuPageTable.c
@@ -789,8 +789,7 @@ RefreshGcdMemoryAttributesFromPaging (
UINT64 BaseAddress;
UINT64 PageStartAddress;
UINT64 Attributes;
- UINT64 Capabilities;
- BOOLEAN DoUpdate;
+ UINT64 NewAttributes;
UINTN Index;
//
@@ -802,9 +801,8 @@ RefreshGcdMemoryAttributesFromPaging (
GetCurrentPagingContext (&PagingContext);
- DoUpdate = FALSE;
- Capabilities = 0;
Attributes = 0;
+ NewAttributes = 0;
BaseAddress = 0;
PageLength = 0;
@@ -813,6 +811,34 @@ RefreshGcdMemoryAttributesFromPaging (
continue;
}
+ //
+ // Sync the actual paging related capabilities back to GCD service first.
+ // As a side effect (good one), this can also help to avoid unnecessary
+ // memory map entries due to the different capabilities of the same type
+ // memory, such as multiple RT_CODE and RT_DATA entries in memory map,
+ // which could cause boot failure of some old Linux distro (before v4.3).
+ //
+ Status = gDS->SetMemorySpaceCapabilities (
+ MemorySpaceMap[Index].BaseAddress,
+ MemorySpaceMap[Index].Length,
+ MemorySpaceMap[Index].Capabilities |
+ EFI_MEMORY_PAGETYPE_MASK
+ );
+ if (EFI_ERROR (Status)) {
+ //
+ // If we cannot udpate the capabilities, we cannot update its
+ // attributes either. So just simply skip current block of memory.
+ //
+ DEBUG ((
+ DEBUG_WARN,
+ "Failed to update capability: [%d] %016lx - %016lx (%016lx -> %016lx)\r\n",
+ Index, BaseAddress, BaseAddress + Length - 1,
+ MemorySpaceMap[Index].Capabilities,
+ MemorySpaceMap[Index].Capabilities | EFI_MEMORY_PAGETYPE_MASK
+ ));
+ continue;
+ }
+
if (MemorySpaceMap[Index].BaseAddress >= (BaseAddress + PageLength)) {
//
// Current memory space starts at a new page. Resetting PageLength will
@@ -826,7 +852,9 @@ RefreshGcdMemoryAttributesFromPaging (
PageLength -= (MemorySpaceMap[Index].BaseAddress - BaseAddress);
}
- // Sync real page attributes to GCD
+ //
+ // Sync actual page attributes to GCD
+ //
BaseAddress = MemorySpaceMap[Index].BaseAddress;
MemorySpaceLength = MemorySpaceMap[Index].Length;
while (MemorySpaceLength > 0) {
@@ -842,23 +870,26 @@ RefreshGcdMemoryAttributesFromPaging (
PageStartAddress = (*PageEntry) & (UINT64)PageAttributeToMask(PageAttribute);
PageLength = PageAttributeToLength (PageAttribute) - (BaseAddress - PageStartAddress);
Attributes = GetAttributesFromPageEntry (PageEntry);
-
- if (Attributes != (MemorySpaceMap[Index].Attributes & EFI_MEMORY_PAGETYPE_MASK)) {
- DoUpdate = TRUE;
- Attributes |= (MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_PAGETYPE_MASK);
- Capabilities = Attributes | MemorySpaceMap[Index].Capabilities;
- } else {
- DoUpdate = FALSE;
- }
}
Length = MIN (PageLength, MemorySpaceLength);
- if (DoUpdate) {
- gDS->SetMemorySpaceCapabilities (BaseAddress, Length, Capabilities);
- gDS->SetMemorySpaceAttributes (BaseAddress, Length, Attributes);
- DEBUG ((DEBUG_INFO, "Update memory space attribute: [%02d] %016lx - %016lx (%08lx -> %08lx)\r\n",
- Index, BaseAddress, BaseAddress + Length - 1,
- MemorySpaceMap[Index].Attributes, Attributes));
+ if (Attributes != (MemorySpaceMap[Index].Attributes
+ & EFI_MEMORY_PAGETYPE_MASK)) {
+ NewAttributes = (MemorySpaceMap[Index].Attributes
+ & ~EFI_MEMORY_PAGETYPE_MASK) | Attributes;
+ Status = gDS->SetMemorySpaceAttributes (
+ BaseAddress,
+ Length,
+ NewAttributes
+ );
+ ASSERT_EFI_ERROR (Status);
+ DEBUG ((
+ DEBUG_INFO,
+ "Updated memory space attribute: [%d] %016lx - %016lx (%016lx -> %016lx)\r\n",
+ Index, BaseAddress, BaseAddress + Length - 1,
+ MemorySpaceMap[Index].Attributes,
+ NewAttributes
+ ));
}
PageLength -= Length;
--
2.14.1.windows.1
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Hi Jian,
this is v4, but the subject says v3 :) If you post a new version, please
make sure that it says "v5" in the subject.
The logic looks OK to me; I've got some comments on style:
On 11/09/17 02:39, Jian J Wang wrote:
>> v4:
>> a. Remove DoUpdate and check attributes mismatch all the time to avoid
>> a logic hole
>> b. Add warning message if failed to update capability
>> c. Add local variable to hold new attributes to make code cleaner
>
>> v3:
>> a. Add comment to explain more on updating memory capabilities
>> b. Fix logic hole in updating attributes
>> c. Instead of checking illegal memory space address and size, use return
>> status of gDS->SetMemorySpaceCapabilities() to skip memory block which
>> cannot be updated with new capabilities.
>
>> v2
>> a. Fix an issue which will cause setting capability failure if size is smaller
>> than a page.
>
> More than one entry of RT_CODE memory might cause boot problem for some
> old OSs. This patch will fix this issue to keep OS compatibility as much
> as possible.
>
> More detailed information, please refer to
> https://bugzilla.tianocore.org/show_bug.cgi?id=753
>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
> ---
> UefiCpuPkg/CpuDxe/CpuPageTable.c | 69 +++++++++++++++++++++++++++++-----------
> 1 file changed, 50 insertions(+), 19 deletions(-)
>
> diff --git a/UefiCpuPkg/CpuDxe/CpuPageTable.c b/UefiCpuPkg/CpuDxe/CpuPageTable.c
> index d312eb66f8..a1d804caed 100644
> --- a/UefiCpuPkg/CpuDxe/CpuPageTable.c
> +++ b/UefiCpuPkg/CpuDxe/CpuPageTable.c
> @@ -789,8 +789,7 @@ RefreshGcdMemoryAttributesFromPaging (
> UINT64 BaseAddress;
> UINT64 PageStartAddress;
> UINT64 Attributes;
> - UINT64 Capabilities;
> - BOOLEAN DoUpdate;
> + UINT64 NewAttributes;
> UINTN Index;
>
> //
> @@ -802,9 +801,8 @@ RefreshGcdMemoryAttributesFromPaging (
>
> GetCurrentPagingContext (&PagingContext);
>
> - DoUpdate = FALSE;
> - Capabilities = 0;
> Attributes = 0;
> + NewAttributes = 0;
> BaseAddress = 0;
> PageLength = 0;
>
> @@ -813,6 +811,34 @@ RefreshGcdMemoryAttributesFromPaging (
> continue;
> }
>
> + //
> + // Sync the actual paging related capabilities back to GCD service first.
> + // As a side effect (good one), this can also help to avoid unnecessary
> + // memory map entries due to the different capabilities of the same type
> + // memory, such as multiple RT_CODE and RT_DATA entries in memory map,
> + // which could cause boot failure of some old Linux distro (before v4.3).
> + //
> + Status = gDS->SetMemorySpaceCapabilities (
> + MemorySpaceMap[Index].BaseAddress,
> + MemorySpaceMap[Index].Length,
> + MemorySpaceMap[Index].Capabilities |
> + EFI_MEMORY_PAGETYPE_MASK
> + );
> + if (EFI_ERROR (Status)) {
> + //
> + // If we cannot udpate the capabilities, we cannot update its
> + // attributes either. So just simply skip current block of memory.
> + //
> + DEBUG ((
> + DEBUG_WARN,
> + "Failed to update capability: [%d] %016lx - %016lx (%016lx -> %016lx)\r\n",
> + Index, BaseAddress, BaseAddress + Length - 1,
(1) I think you forgot about my note that Index (which is of type UINTN)
should not be printed with "%d". Instead, (UINT64)Index should be
printed with "%lu".
> + MemorySpaceMap[Index].Capabilities,
> + MemorySpaceMap[Index].Capabilities | EFI_MEMORY_PAGETYPE_MASK
> + ));
> + continue;
> + }
> +
> if (MemorySpaceMap[Index].BaseAddress >= (BaseAddress + PageLength)) {
> //
> // Current memory space starts at a new page. Resetting PageLength will
> @@ -826,7 +852,9 @@ RefreshGcdMemoryAttributesFromPaging (
> PageLength -= (MemorySpaceMap[Index].BaseAddress - BaseAddress);
> }
>
> - // Sync real page attributes to GCD
> + //
> + // Sync actual page attributes to GCD
> + //
> BaseAddress = MemorySpaceMap[Index].BaseAddress;
> MemorySpaceLength = MemorySpaceMap[Index].Length;
> while (MemorySpaceLength > 0) {
> @@ -842,23 +870,26 @@ RefreshGcdMemoryAttributesFromPaging (
> PageStartAddress = (*PageEntry) & (UINT64)PageAttributeToMask(PageAttribute);
> PageLength = PageAttributeToLength (PageAttribute) - (BaseAddress - PageStartAddress);
> Attributes = GetAttributesFromPageEntry (PageEntry);
> -
> - if (Attributes != (MemorySpaceMap[Index].Attributes & EFI_MEMORY_PAGETYPE_MASK)) {
> - DoUpdate = TRUE;
> - Attributes |= (MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_PAGETYPE_MASK);
> - Capabilities = Attributes | MemorySpaceMap[Index].Capabilities;
> - } else {
> - DoUpdate = FALSE;
> - }
> }
>
> Length = MIN (PageLength, MemorySpaceLength);
> - if (DoUpdate) {
> - gDS->SetMemorySpaceCapabilities (BaseAddress, Length, Capabilities);
> - gDS->SetMemorySpaceAttributes (BaseAddress, Length, Attributes);
> - DEBUG ((DEBUG_INFO, "Update memory space attribute: [%02d] %016lx - %016lx (%08lx -> %08lx)\r\n",
> - Index, BaseAddress, BaseAddress + Length - 1,
> - MemorySpaceMap[Index].Attributes, Attributes));
> + if (Attributes != (MemorySpaceMap[Index].Attributes
> + & EFI_MEMORY_PAGETYPE_MASK)) {
> + NewAttributes = (MemorySpaceMap[Index].Attributes
> + & ~EFI_MEMORY_PAGETYPE_MASK) | Attributes;
(2) To my understanding, the edk2 coding style wants us to keep the
bitwise-and operator ("&") at the end of the line.
> + Status = gDS->SetMemorySpaceAttributes (
> + BaseAddress,
> + Length,
> + NewAttributes
> + );
> + ASSERT_EFI_ERROR (Status);
> + DEBUG ((
> + DEBUG_INFO,
> + "Updated memory space attribute: [%d] %016lx - %016lx (%016lx -> %016lx)\r\n",
> + Index, BaseAddress, BaseAddress + Length - 1,
(3) Same comment as (1).
Thanks,
Laszlo
> + MemorySpaceMap[Index].Attributes,
> + NewAttributes
> + ));
> }
>
> PageLength -= Length;
>
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Thanks for catching them. There'll be v5 today:)
> -----Original Message-----
> From: Laszlo Ersek [mailto:lersek@redhat.com]
> Sent: Thursday, November 09, 2017 10:13 PM
> To: Wang, Jian J <jian.j.wang@intel.com>; edk2-devel@lists.01.org
> Cc: Yao, Jiewen <jiewen.yao@intel.com>; Dong, Eric <eric.dong@intel.com>
> Subject: Re: [edk2] [PATCH v3] UefiCpuPkg/CpuDxe: Fix multiple entries of
> RT_CODE in memory map
>
> Hi Jian,
>
> this is v4, but the subject says v3 :) If you post a new version, please
> make sure that it says "v5" in the subject.
>
> The logic looks OK to me; I've got some comments on style:
>
> On 11/09/17 02:39, Jian J Wang wrote:
> >> v4:
> >> a. Remove DoUpdate and check attributes mismatch all the time to avoid
> >> a logic hole
> >> b. Add warning message if failed to update capability
> >> c. Add local variable to hold new attributes to make code cleaner
> >
> >> v3:
> >> a. Add comment to explain more on updating memory capabilities
> >> b. Fix logic hole in updating attributes
> >> c. Instead of checking illegal memory space address and size, use return
> >> status of gDS->SetMemorySpaceCapabilities() to skip memory block which
> >> cannot be updated with new capabilities.
> >
> >> v2
> >> a. Fix an issue which will cause setting capability failure if size is smaller
> >> than a page.
> >
> > More than one entry of RT_CODE memory might cause boot problem for
> some
> > old OSs. This patch will fix this issue to keep OS compatibility as much
> > as possible.
> >
> > More detailed information, please refer to
> > https://bugzilla.tianocore.org/show_bug.cgi?id=753
> >
> > Cc: Eric Dong <eric.dong@intel.com>
> > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > Cc: Laszlo Ersek <lersek@redhat.com>
> > Contributed-under: TianoCore Contribution Agreement 1.1
> > Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
> > ---
> > UefiCpuPkg/CpuDxe/CpuPageTable.c | 69
> +++++++++++++++++++++++++++++-----------
> > 1 file changed, 50 insertions(+), 19 deletions(-)
> >
> > diff --git a/UefiCpuPkg/CpuDxe/CpuPageTable.c
> b/UefiCpuPkg/CpuDxe/CpuPageTable.c
> > index d312eb66f8..a1d804caed 100644
> > --- a/UefiCpuPkg/CpuDxe/CpuPageTable.c
> > +++ b/UefiCpuPkg/CpuDxe/CpuPageTable.c
> > @@ -789,8 +789,7 @@ RefreshGcdMemoryAttributesFromPaging (
> > UINT64 BaseAddress;
> > UINT64 PageStartAddress;
> > UINT64 Attributes;
> > - UINT64 Capabilities;
> > - BOOLEAN DoUpdate;
> > + UINT64 NewAttributes;
> > UINTN Index;
> >
> > //
> > @@ -802,9 +801,8 @@ RefreshGcdMemoryAttributesFromPaging (
> >
> > GetCurrentPagingContext (&PagingContext);
> >
> > - DoUpdate = FALSE;
> > - Capabilities = 0;
> > Attributes = 0;
> > + NewAttributes = 0;
> > BaseAddress = 0;
> > PageLength = 0;
> >
> > @@ -813,6 +811,34 @@ RefreshGcdMemoryAttributesFromPaging (
> > continue;
> > }
> >
> > + //
> > + // Sync the actual paging related capabilities back to GCD service first.
> > + // As a side effect (good one), this can also help to avoid unnecessary
> > + // memory map entries due to the different capabilities of the same type
> > + // memory, such as multiple RT_CODE and RT_DATA entries in memory
> map,
> > + // which could cause boot failure of some old Linux distro (before v4.3).
> > + //
> > + Status = gDS->SetMemorySpaceCapabilities (
> > + MemorySpaceMap[Index].BaseAddress,
> > + MemorySpaceMap[Index].Length,
> > + MemorySpaceMap[Index].Capabilities |
> > + EFI_MEMORY_PAGETYPE_MASK
> > + );
> > + if (EFI_ERROR (Status)) {
> > + //
> > + // If we cannot udpate the capabilities, we cannot update its
> > + // attributes either. So just simply skip current block of memory.
> > + //
> > + DEBUG ((
> > + DEBUG_WARN,
> > + "Failed to update capability: [%d] %016lx - %016lx (%016lx -
> > %016lx)\r\n",
> > + Index, BaseAddress, BaseAddress + Length - 1,
>
> (1) I think you forgot about my note that Index (which is of type UINTN)
> should not be printed with "%d". Instead, (UINT64)Index should be
> printed with "%lu".
>
> > + MemorySpaceMap[Index].Capabilities,
> > + MemorySpaceMap[Index].Capabilities | EFI_MEMORY_PAGETYPE_MASK
> > + ));
> > + continue;
> > + }
> > +
> > if (MemorySpaceMap[Index].BaseAddress >= (BaseAddress + PageLength)) {
> > //
> > // Current memory space starts at a new page. Resetting PageLength will
> > @@ -826,7 +852,9 @@ RefreshGcdMemoryAttributesFromPaging (
> > PageLength -= (MemorySpaceMap[Index].BaseAddress - BaseAddress);
> > }
> >
> > - // Sync real page attributes to GCD
> > + //
> > + // Sync actual page attributes to GCD
> > + //
> > BaseAddress = MemorySpaceMap[Index].BaseAddress;
> > MemorySpaceLength = MemorySpaceMap[Index].Length;
> > while (MemorySpaceLength > 0) {
> > @@ -842,23 +870,26 @@ RefreshGcdMemoryAttributesFromPaging (
> > PageStartAddress = (*PageEntry) &
> (UINT64)PageAttributeToMask(PageAttribute);
> > PageLength = PageAttributeToLength (PageAttribute) - (BaseAddress -
> PageStartAddress);
> > Attributes = GetAttributesFromPageEntry (PageEntry);
> > -
> > - if (Attributes != (MemorySpaceMap[Index].Attributes &
> EFI_MEMORY_PAGETYPE_MASK)) {
> > - DoUpdate = TRUE;
> > - Attributes |= (MemorySpaceMap[Index].Attributes &
> ~EFI_MEMORY_PAGETYPE_MASK);
> > - Capabilities = Attributes | MemorySpaceMap[Index].Capabilities;
> > - } else {
> > - DoUpdate = FALSE;
> > - }
> > }
> >
> > Length = MIN (PageLength, MemorySpaceLength);
> > - if (DoUpdate) {
> > - gDS->SetMemorySpaceCapabilities (BaseAddress, Length, Capabilities);
> > - gDS->SetMemorySpaceAttributes (BaseAddress, Length, Attributes);
> > - DEBUG ((DEBUG_INFO, "Update memory space attribute: [%02d] %016lx
> - %016lx (%08lx -> %08lx)\r\n",
> > - Index, BaseAddress, BaseAddress + Length - 1,
> > - MemorySpaceMap[Index].Attributes, Attributes));
> > + if (Attributes != (MemorySpaceMap[Index].Attributes
> > + & EFI_MEMORY_PAGETYPE_MASK)) {
> > + NewAttributes = (MemorySpaceMap[Index].Attributes
> > + & ~EFI_MEMORY_PAGETYPE_MASK) | Attributes;
>
> (2) To my understanding, the edk2 coding style wants us to keep the
> bitwise-and operator ("&") at the end of the line.
>
> > + Status = gDS->SetMemorySpaceAttributes (
> > + BaseAddress,
> > + Length,
> > + NewAttributes
> > + );
> > + ASSERT_EFI_ERROR (Status);
> > + DEBUG ((
> > + DEBUG_INFO,
> > + "Updated memory space attribute: [%d] %016lx - %016lx (%016lx -
> > %016lx)\r\n",
> > + Index, BaseAddress, BaseAddress + Length - 1,
>
> (3) Same comment as (1).
>
> Thanks,
> Laszlo
>
> > + MemorySpaceMap[Index].Attributes,
> > + NewAttributes
> > + ));
> > }
> >
> > PageLength -= Length;
> >
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