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StandaloneMmPkg/Core: Check Resource HOB and Mmram ranges

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Check if the all the resource HOB in the input HOB list of
MmCore entry only covers non-Mmram ranges. The Resource HOB
is to describe the accessible non-Mmram range. All Resource
HOB should not overlap with any Mmram range.

Signed-off-by: Dun Tan <dun.tan@intel.com>
This commit is contained in:
Dun Tan 2024-10-21 17:45:56 +08:00 committed by mergify[bot]
parent 3adb507175
commit da8fd23dbb
1 changed files with 36 additions and 4 deletions
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40
StandaloneMmPkg/Core/StandaloneMmCore.c
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@ -700,28 +700,60 @@ MigrateMemoryAllocationHobs (
} }
/** /**
This function is responsible for initializing a new HOB list in MMRAM based on This function is responsible for validating the input HOB list and
the input HOB list. initializing a new HOB list in MMRAM based on the input HOB list.
@param [in] HobStart Pointer to the start of the HOB list. @param [in] HobStart Pointer to the start of the HOB list.
@param [in] MmramRanges Pointer to the Mmram ranges.
@param [in] MmramRangeCount Count of Mmram ranges.
@retval Pointer to the new location of hob list in MMRAM. @retval Pointer to the new location of hob list in MMRAM.
**/ **/
VOID * VOID *
InitializeMmHobList ( InitializeMmHobList (
IN VOID *HobStart IN VOID *HobStart,
IN EFI_MMRAM_DESCRIPTOR *MmramRanges,
IN UINTN MmramRangeCount
) )
{ {
VOID *MmHobStart; VOID *MmHobStart;
UINTN HobSize; UINTN HobSize;
EFI_STATUS Status; EFI_STATUS Status;
EFI_PEI_HOB_POINTERS Hob; EFI_PEI_HOB_POINTERS Hob;
UINTN Index;
EFI_PHYSICAL_ADDRESS MmramBase;
EFI_PHYSICAL_ADDRESS MmramEnd;
EFI_PHYSICAL_ADDRESS ResourceHobBase;
EFI_PHYSICAL_ADDRESS ResourceHobEnd;
ASSERT (HobStart != NULL); ASSERT (HobStart != NULL);
Hob.Raw = (UINT8 *)HobStart; Hob.Raw = (UINT8 *)HobStart;
while (!END_OF_HOB_LIST (Hob)) { while (!END_OF_HOB_LIST (Hob)) {
Hob.Raw = GET_NEXT_HOB (Hob); Hob.Raw = GET_NEXT_HOB (Hob);
if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
ResourceHobBase = Hob.ResourceDescriptor->PhysicalStart;
ResourceHobEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
for (Index = 0; Index < MmramRangeCount; Index++) {
MmramBase = MmramRanges[Index].PhysicalStart;
MmramEnd = MmramRanges[Index].PhysicalStart + MmramRanges[Index].PhysicalSize;
if ((MmramBase < ResourceHobEnd) && (MmramEnd > ResourceHobBase)) {
//
// The Resource HOB is to describe the accessible non-Mmram range.
// All Resource HOB should not overlapp with any Mmram range.
//
DEBUG ((
DEBUG_ERROR,
"The resource HOB range [0x%lx, 0x%lx] overlaps with MMRAM range\n",
ResourceHobBase,
ResourceHobEnd
));
CpuDeadLoop ();
}
}
}
} }
// //
@ -821,7 +853,7 @@ StandaloneMmMain (
// //
// Install HobList // Install HobList
// //
gHobList = InitializeMmHobList (HobStart); gHobList = InitializeMmHobList (HobStart, MmramRanges, MmramRangeCount);
// //
// Register notification for EFI_MM_CONFIGURATION_PROTOCOL registration and // Register notification for EFI_MM_CONFIGURATION_PROTOCOL registration and