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ovmf
ovmf-bsc1092943-fix-attributes-table.patch
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File ovmf-bsc1092943-fix-attributes-table.patch of Package ovmf
From 05d65cc26b15944e1d57c11e63072f1ab71c77b2 Mon Sep 17 00:00:00 2001 From: Jian J Wang <jian.j.wang@intel.com> Date: Mon, 23 Oct 2017 14:49:02 +0800 Subject: [PATCH 1/3] UefiCpuPkg/CpuDxe: Fix multiple entries of RT_CODE in memory map 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 Laszlo did a thorough test on OVMF emulated platform. The details can be found at https://bugzilla.tianocore.org/show_bug.cgi?id=753#c10 Cc: Eric Dong <eric.dong@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang <jian.j.wang@intel.com> Tested-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> (cherry picked from commit 768bd967847e91aa236c1eed3507e0863547f544) --- UefiCpuPkg/CpuDxe/CpuPageTable.c | 94 +++++++++++++++++++++++++++++++--------- 1 file changed, 73 insertions(+), 21 deletions(-) diff --git a/UefiCpuPkg/CpuDxe/CpuPageTable.c b/UefiCpuPkg/CpuDxe/CpuPageTable.c index 309f448a8357..db41fa401f19 100644 --- a/UefiCpuPkg/CpuDxe/CpuPageTable.c +++ b/UefiCpuPkg/CpuDxe/CpuPageTable.c @@ -769,6 +769,20 @@ AssignMemoryPageAttributes ( return Status; } +/** + Check if Execute Disable feature is enabled or not. +**/ +BOOLEAN +IsExecuteDisableEnabled ( + VOID + ) +{ + MSR_CORE_IA32_EFER_REGISTER MsrEfer; + + MsrEfer.Uint64 = AsmReadMsr64 (MSR_IA32_EFER); + return (MsrEfer.Bits.NXE == 1); +} + /** Update GCD memory space attributes according to current page table setup. **/ @@ -790,7 +804,7 @@ RefreshGcdMemoryAttributesFromPaging ( UINT64 PageStartAddress; UINT64 Attributes; UINT64 Capabilities; - BOOLEAN DoUpdate; + UINT64 NewAttributes; UINTN Index; // @@ -802,17 +816,50 @@ RefreshGcdMemoryAttributesFromPaging ( GetCurrentPagingContext (&PagingContext); - DoUpdate = FALSE; - Capabilities = 0; - Attributes = 0; - BaseAddress = 0; - PageLength = 0; + Attributes = 0; + NewAttributes = 0; + BaseAddress = 0; + PageLength = 0; + + if (IsExecuteDisableEnabled ()) { + Capabilities = EFI_MEMORY_RO | EFI_MEMORY_RP | EFI_MEMORY_XP; + } else { + Capabilities = EFI_MEMORY_RO | EFI_MEMORY_RP; + } for (Index = 0; Index < NumberOfDescriptors; Index++) { if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeNonExistent) { 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 | Capabilities + ); + 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: [%lu] %016lx - %016lx (%016lx -> %016lx)\r\n", + (UINT64)Index, MemorySpaceMap[Index].BaseAddress, + MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length - 1, + MemorySpaceMap[Index].Capabilities, + MemorySpaceMap[Index].Capabilities | Capabilities + )); + continue; + } + if (MemorySpaceMap[Index].BaseAddress >= (BaseAddress + PageLength)) { // // Current memory space starts at a new page. Resetting PageLength will @@ -826,7 +873,9 @@ 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 +891,26 @@ 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: [%lu] %016lx - %016lx (%016lx -> %016lx)\r\n", + (UINT64)Index, BaseAddress, BaseAddress + Length - 1, + MemorySpaceMap[Index].Attributes, + NewAttributes + )); } PageLength -= Length; -- 2.16.3 From 7478b4efda85470b9507b8c693a955763c9355bd Mon Sep 17 00:00:00 2001 From: Jian J Wang <jian.j.wang@intel.com> Date: Thu, 23 Nov 2017 09:48:33 +0800 Subject: [PATCH 2/3] MdeModulePkg/DxeCore: Filter out all paging capabilities Some OSs will treat EFI_MEMORY_DESCRIPTOR.Attribute as really set attributes and change memory paging attribute accordingly. But current EFI_MEMORY_DESCRIPTOR.Attribute is assigned by value from Capabilities in GCD memory map. This might cause boot problems. Clearing all paging related capabilities can workaround it. The code added in this patch is supposed to be removed once the usage of EFI_MEMORY_DESCRIPTOR.Attribute is clarified in UEFI spec and adopted by both EDK-II Core and all supported OSs. Laszlo did a thorough test on OVMF emulated platform. The details can be found at https://bugzilla.tianocore.org/show_bug.cgi?id=753#c10 Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang <jian.j.wang@intel.com> Tested-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> (cherry picked from commit e38451cd9a87f86d9c699281252d381e10dcc98e) --- MdeModulePkg/Core/Dxe/Mem/Page.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c index f1e4a37f2af6..5636d3bf421d 100644 --- a/MdeModulePkg/Core/Dxe/Mem/Page.c +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c @@ -1687,6 +1687,7 @@ CoreGetMemoryMap ( EFI_GCD_MAP_ENTRY MergeGcdMapEntry; EFI_MEMORY_TYPE Type; EFI_MEMORY_DESCRIPTOR *MemoryMapStart; + EFI_MEMORY_DESCRIPTOR *MemoryMapEnd; // // Make sure the parameters are valid @@ -1896,6 +1897,25 @@ CoreGetMemoryMap ( // BufferSize = ((UINT8 *)MemoryMap - (UINT8 *)MemoryMapStart); + // + // Note: Some OSs will treat EFI_MEMORY_DESCRIPTOR.Attribute as really + // set attributes and change memory paging attribute accordingly. + // But current EFI_MEMORY_DESCRIPTOR.Attribute is assigned by + // value from Capabilities in GCD memory map. This might cause + // boot problems. Clearing all paging related capabilities can + // workaround it. Following code is supposed to be removed once + // the usage of EFI_MEMORY_DESCRIPTOR.Attribute is clarified in + // UEFI spec and adopted by both EDK-II Core and all supported + // OSs. + // + MemoryMapEnd = MemoryMap; + MemoryMap = MemoryMapStart; + while (MemoryMap < MemoryMapEnd) { + MemoryMap->Attribute &= ~(UINT64)(EFI_MEMORY_RP | EFI_MEMORY_RO | + EFI_MEMORY_XP); + MemoryMap = NEXT_MEMORY_DESCRIPTOR (MemoryMap, Size); + } + Status = EFI_SUCCESS; Done: -- 2.16.3 From 0e383df1cb58429d82b158edb7ee9cece022975f Mon Sep 17 00:00:00 2001 From: Jian J Wang <jian.j.wang@intel.com> Date: Thu, 23 Nov 2017 09:57:01 +0800 Subject: [PATCH 3/3] MdeModulePkg/Core: Merge memory map after filtering paging capability Once the paging capabilities were filtered out, there might be some adjacent entries sharing the same capabilities. It's recommended to merge those entries for the OS compatibility purpose. This patch makes use of existing method MergeMemoryMap() to do it. This is done by simply turning this method from static to extern, and call it after filter code. This patch is related to an issue described at https://bugzilla.tianocore.org/show_bug.cgi?id=753 This patch is also passed test of booting follow OSs: Windows 10 Windows Server 2016 Fedora 26 Fedora 25 Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Star Zeng <star.zeng@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> Reviewed-by: Star Zeng <star.zeng@intel.com> Acked-by: Laszlo Ersek <lersek@redhat.com> (cherry picked from commit 646127c1929a606a1a5709d78f06f2dd5494b397) --- MdeModulePkg/Core/Dxe/DxeMain.h | 18 ++++++++++++++++++ MdeModulePkg/Core/Dxe/Mem/Page.c | 2 ++ MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c | 1 - 3 files changed, 20 insertions(+), 1 deletion(-) diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h b/MdeModulePkg/Core/Dxe/DxeMain.h index 1a0babba713a..07b86ba696da 100644 --- a/MdeModulePkg/Core/Dxe/DxeMain.h +++ b/MdeModulePkg/Core/Dxe/DxeMain.h @@ -2948,4 +2948,22 @@ ApplyMemoryProtectionPolicy ( IN UINT64 Length ); +/** + Merge continous memory map entries whose have same attributes. + + @param MemoryMap A pointer to the buffer in which firmware places + the current memory map. + @param MemoryMapSize A pointer to the size, in bytes, of the + MemoryMap buffer. On input, this is the size of + the current memory map. On output, + it is the size of new memory map after merge. + @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR. +**/ +VOID +MergeMemoryMap ( + IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap, + IN OUT UINTN *MemoryMapSize, + IN UINTN DescriptorSize + ); + #endif diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c index 5636d3bf421d..ff5c3108ccca 100644 --- a/MdeModulePkg/Core/Dxe/Mem/Page.c +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c @@ -1915,6 +1915,8 @@ CoreGetMemoryMap ( EFI_MEMORY_XP); MemoryMap = NEXT_MEMORY_DESCRIPTOR (MemoryMap, Size); } + MergeMemoryMap (MemoryMapStart, &BufferSize, Size); + MemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *)((UINT8 *)MemoryMapStart + BufferSize); Status = EFI_SUCCESS; diff --git a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c index 6cf5edcbe5d9..75d9b14c1f87 100644 --- a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c +++ b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c @@ -182,7 +182,6 @@ SortMemoryMap ( it is the size of new memory map after merge. @param DescriptorSize Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR. **/ -STATIC VOID MergeMemoryMap ( IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap, -- 2.16.3
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