SmmProfile feature required to protect all SMM ranges by structure
mProtectionMemRangeTemplate. This update is to add additonal save SMM ranges
into mProtectionMemRangeTemplate besides the range specified by
mCpuHotPlugData.SmrrBase/mCpuHotPlugData.SmrrSiz.
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Michael Kinney <michael.d.kin...@intel.com>
Cc: Feng Tian <feng.t...@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff....@intel.com>
---
UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c | 42 +++++++++++++++++++++++++++++-----
1 file changed, 36 insertions(+), 6 deletions(-)
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
index 7125aec..2713b19 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
@@ -83,6 +83,12 @@ MEMORY_PROTECTION_RANGE mProtectionMemRangeTemplate[] = {
{{0x00000000, 0x00000000},TRUE,TRUE},
//
+ // SMRAM ranges not covered by
mCpuHotPlugData.SmrrBase/mCpuHotPlugData.SmrrSiz (to be fixed in runtime).
+ // It is always present and instruction fetches are allowed.
+ // {{0x00000000, 0x00000000},TRUE,FALSE},
+ //
+
+ //
// Future extended range could be added here.
//
@@ -360,7 +366,7 @@ InitProtectedMemRange (
{
UINTN Index;
UINTN NumberOfDescriptors;
- UINTN NumberOfMmioDescriptors;
+ UINTN NumberOfAddedDescriptors;
UINTN NumberOfProtectRange;
UINTN NumberOfSpliteRange;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap;
@@ -373,7 +379,7 @@ InitProtectedMemRange (
UINT64 Low4KBPageSize;
NumberOfDescriptors = 0;
- NumberOfMmioDescriptors = 0;
+ NumberOfAddedDescriptors = mSmmCpuSmramRangeCount;
NumberOfSpliteRange = 0;
MemorySpaceMap = NULL;
@@ -386,12 +392,12 @@ InitProtectedMemRange (
);
for (Index = 0; Index < NumberOfDescriptors; Index++) {
if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeMemoryMappedIo)
{
- NumberOfMmioDescriptors++;
+ NumberOfAddedDescriptors++;
}
}
- if (NumberOfMmioDescriptors != 0) {
- TotalSize = NumberOfMmioDescriptors * sizeof (MEMORY_PROTECTION_RANGE) +
sizeof (mProtectionMemRangeTemplate);
+ if (NumberOfAddedDescriptors != 0) {
+ TotalSize = NumberOfAddedDescriptors * sizeof (MEMORY_PROTECTION_RANGE) +
sizeof (mProtectionMemRangeTemplate);
mProtectionMemRange = (MEMORY_PROTECTION_RANGE *) AllocateZeroPool
(TotalSize);
ASSERT (mProtectionMemRange != NULL);
mProtectionMemRangeCount = TotalSize / sizeof (MEMORY_PROTECTION_RANGE);
@@ -409,9 +415,27 @@ InitProtectedMemRange (
ASSERT (mSplitMemRange != NULL);
//
+ // Create SMM ranges which are set to present and execution-enable.
+ //
+ NumberOfProtectRange = sizeof (mProtectionMemRangeTemplate) / sizeof
(MEMORY_PROTECTION_RANGE);
+ for (Index = 0; Index < mSmmCpuSmramRangeCount; Index++) {
+ if (mSmmCpuSmramRanges[Index].CpuStart >=
mProtectionMemRange[0].Range.Base &&
+ mSmmCpuSmramRanges[Index].CpuStart +
mSmmCpuSmramRanges[Index].PhysicalSize < mProtectionMemRange[0].Range.Top) {
+ //
+ // If the address have been already covered by
mCpuHotPlugData.SmrrBase/mCpuHotPlugData.SmrrSiz
+ //
+ break;
+ }
+ mProtectionMemRange[NumberOfProtectRange].Range.Base =
mSmmCpuSmramRanges[Index].CpuStart;
+ mProtectionMemRange[NumberOfProtectRange].Range.Top =
mSmmCpuSmramRanges[Index].CpuStart + mSmmCpuSmramRanges[Index].PhysicalSize;
+ mProtectionMemRange[NumberOfProtectRange].Present = TRUE;
+ mProtectionMemRange[NumberOfProtectRange].Nx = FALSE;
+ NumberOfProtectRange++;
+ }
+
+ //
// Create MMIO ranges which are set to present and execution-disable.
//
- NumberOfProtectRange = sizeof (mProtectionMemRangeTemplate) / sizeof
(MEMORY_PROTECTION_RANGE);
for (Index = 0; Index < NumberOfDescriptors; Index++) {
if (MemorySpaceMap[Index].GcdMemoryType !=
EfiGcdMemoryTypeMemoryMappedIo) {
continue;
@@ -422,6 +446,12 @@ InitProtectedMemRange (
mProtectionMemRange[NumberOfProtectRange].Nx = TRUE;
NumberOfProtectRange++;
}
+
+ //
+ // Check and updated actual protected memory ranges count
+ //
+ ASSERT (NumberOfProtectRange <= mProtectionMemRangeCount);
+ mProtectionMemRangeCount = NumberOfProtectRange;
}
//
--
2.9.3.windows.2
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