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UefiCpuPkg/PiSmmCpuDxeSmm: Fix memory protection crash 

https://bugzilla.tianocore.org/show_bug.cgi?id=624 reports
memory protection crash in PiSmmCpuDxeSmm, Ia32 build with
RAM above 4GB (of which 2GB are placed in 64-bit address).
It is because UEFI builds identity mapping page tables,
>4G address is not supported at Ia32 build.

This patch is to get the PhysicalAddressBits that is used
to build in PageTbl.c(Ia32/X64), and use it to check whether
the address is supported or not in ConvertMemoryPageAttributes().

With this patch, the debug messages will be like below.
UefiMemory protection: 0x0 - 0x9F000 Success
UefiMemory protection: 0x100000 - 0x807000 Success
UefiMemory protection: 0x808000 - 0x810000 Success
UefiMemory protection: 0x818000 - 0x820000 Success
UefiMemory protection: 0x1510000 - 0x7B798000 Success
UefiMemory protection: 0x7B79B000 - 0x7E538000 Success
UefiMemory protection: 0x7E539000 - 0x7E545000 Success
UefiMemory protection: 0x7E55A000 - 0x7E61F000 Success
UefiMemory protection: 0x7E62B000 - 0x7F6AB000 Success
UefiMemory protection: 0x7F703000 - 0x7F70B000 Success
UefiMemory protection: 0x7F70F000 - 0x7F778000 Success
UefiMemory protection: 0x100000000 - 0x180000000 Unsupported

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Eric Dong <eric.dong@intel.com>
Originally-suggested-by: Jiewen Yao <jiewen.yao@intel.com>
Reported-by: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Star Zeng 2017-08-24 10:59:14 +08:00
parent 9f3a38cdfb
commit 714c260301
3 changed files with 30 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c
View File

@ -16,6 +16,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include "PiSmmCpuDxeSmm.h"
UINT8 mPhysicalAddressBits;
/**
Create PageTable for SMM use.
@ -36,6 +38,8 @@ SmmInitPageTable (
//
InitializeSpinLock (mPFLock);
mPhysicalAddressBits = 32;
if (FeaturePcdGet (PcdCpuSmmProfileEnable)) {
//
// Set own Page Fault entry instead of the default one, because SMM Profile

1
UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h
View File

@ -419,6 +419,7 @@ extern SPIN_LOCK *mConfigSmmCodeAccessCheckLock;
extern SPIN_LOCK *mMemoryMappedLock;
extern EFI_SMRAM_DESCRIPTOR *mSmmCpuSmramRanges;
extern UINTN mSmmCpuSmramRangeCount;
extern UINT8 mPhysicalAddressBits;
//
// Copy of the PcdPteMemoryEncryptionAddressOrMask

31
UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
View File

@ -1,6 +1,6 @@
/** @file
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2017, 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
@ -380,6 +380,7 @@ ConvertMemoryPageAttributes (
PAGE_ATTRIBUTE SplitAttribute;
RETURN_STATUS Status;
BOOLEAN IsEntryModified;
EFI_PHYSICAL_ADDRESS MaximumSupportMemAddress;
ASSERT (Attributes != 0);
ASSERT ((Attributes & ~(EFI_MEMORY_RP | EFI_MEMORY_RO | EFI_MEMORY_XP)) == 0);
@ -391,6 +392,17 @@ ConvertMemoryPageAttributes (
return RETURN_INVALID_PARAMETER;
}
MaximumSupportMemAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)(LShiftU64 (1, mPhysicalAddressBits) - 1);
if (BaseAddress > MaximumSupportMemAddress) {
return RETURN_UNSUPPORTED;
}
if (Length > MaximumSupportMemAddress) {
return RETURN_UNSUPPORTED;
}
if ((Length != 0) && (BaseAddress > MaximumSupportMemAddress - (Length - 1))) {
return RETURN_UNSUPPORTED;
}
// DEBUG ((DEBUG_ERROR, "ConvertMemoryPageAttributes(%x) - %016lx, %016lx, %02lx\n", IsSet, BaseAddress, Length, Attributes));
if (IsSplitted != NULL) {
@ -1037,6 +1049,7 @@ SetUefiMemMapAttributes (
VOID
)
{
EFI_STATUS Status;
EFI_MEMORY_DESCRIPTOR *MemoryMap;
UINTN MemoryMapEntryCount;
UINTN Index;
@ -1052,12 +1065,18 @@ SetUefiMemMapAttributes (
MemoryMap = mUefiMemoryMap;
for (Index = 0; Index < MemoryMapEntryCount; Index++) {
if (IsUefiPageNotPresent(MemoryMap)) {
DEBUG ((DEBUG_INFO, "UefiMemory protection: 0x%lx - 0x%lx\n", MemoryMap->PhysicalStart, MemoryMap->PhysicalStart + (UINT64)EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages)));
SmmSetMemoryAttributes (
Status = SmmSetMemoryAttributes (
MemoryMap->PhysicalStart,
EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),
EFI_MEMORY_RP
);
DEBUG ((
DEBUG_INFO,
"UefiMemory protection: 0x%lx - 0x%lx %r\n",
MemoryMap->PhysicalStart,
EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),
EFI_MEMORY_RP
);
MemoryMap->PhysicalStart + (UINT64)EFI_PAGES_TO_SIZE((UINTN)MemoryMap->NumberOfPages),
Status
));
}
MemoryMap = NEXT_MEMORY_DESCRIPTOR(MemoryMap, mUefiDescriptorSize);
}