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UefiCpuPkg: Add GenSmmPageTable() to create smm page table

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This commit is code refinement to current smm pagetable generation
code. Add a new GenSmmPageTable() API to create smm page table
based on the PageTableMap() API in CpuPageTableLib. Caller only
needs to specify the paging mode and the PhysicalAddressBits to map.
This function can be used to create both IA32 pae paging and X64
5level, 4level paging.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Dun Tan
2023-05-15 15:47:54 +08:00
committed by Ray Ni
parent d706d9c64a
commit 701b5797b2
4 changed files with 107 additions and 195 deletions
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65
UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
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@@ -1646,6 +1646,71 @@ EdkiiSmmClearMemoryAttributes (
return SmmClearMemoryAttributes (BaseAddress, Length, Attributes);
}
/**
Create page table based on input PagingMode and PhysicalAddressBits in smm.
@param[in] PagingMode The paging mode.
@param[in] PhysicalAddressBits The bits of physical address to map.
@retval PageTable Address
**/
UINTN
GenSmmPageTable (
IN PAGING_MODE PagingMode,
IN UINT8 PhysicalAddressBits
)
{
UINTN PageTableBufferSize;
UINTN PageTable;
VOID *PageTableBuffer;
IA32_MAP_ATTRIBUTE MapAttribute;
IA32_MAP_ATTRIBUTE MapMask;
RETURN_STATUS Status;
UINTN GuardPage;
UINTN Index;
UINT64 Length;
Length = LShiftU64 (1, PhysicalAddressBits);
PageTable = 0;
PageTableBufferSize = 0;
MapMask.Uint64 = MAX_UINT64;
MapAttribute.Uint64 = mAddressEncMask;
MapAttribute.Bits.Present = 1;
MapAttribute.Bits.ReadWrite = 1;
MapAttribute.Bits.UserSupervisor = 1;
MapAttribute.Bits.Accessed = 1;
MapAttribute.Bits.Dirty = 1;
Status = PageTableMap (&PageTable, PagingMode, NULL, &PageTableBufferSize, 0, Length, &MapAttribute, &MapMask, NULL);
ASSERT (Status == RETURN_BUFFER_TOO_SMALL);
DEBUG ((DEBUG_INFO, "GenSMMPageTable: 0x%x bytes needed for initial SMM page table\n", PageTableBufferSize));
PageTableBuffer = AllocatePageTableMemory (EFI_SIZE_TO_PAGES (PageTableBufferSize));
ASSERT (PageTableBuffer != NULL);
Status = PageTableMap (&PageTable, PagingMode, PageTableBuffer, &PageTableBufferSize, 0, Length, &MapAttribute, &MapMask, NULL);
ASSERT (Status == RETURN_SUCCESS);
ASSERT (PageTableBufferSize == 0);
if (FeaturePcdGet (PcdCpuSmmStackGuard)) {
//
// Mark the 4KB guard page between known good stack and smm stack as non-present
//
for (Index = 0; Index < gSmmCpuPrivate->SmmCoreEntryContext.NumberOfCpus; Index++) {
GuardPage = mSmmStackArrayBase + EFI_PAGE_SIZE + Index * (mSmmStackSize + mSmmShadowStackSize);
Status = ConvertMemoryPageAttributes (PageTable, PagingMode, GuardPage, SIZE_4KB, EFI_MEMORY_RP, TRUE, NULL);
}
}
if ((PcdGet8 (PcdNullPointerDetectionPropertyMask) & BIT1) != 0) {
//
// Mark [0, 4k] as non-present
//
Status = ConvertMemoryPageAttributes (PageTable, PagingMode, 0, SIZE_4KB, EFI_MEMORY_RP, TRUE, NULL);
}
return (UINTN)PageTable;
}
/**
This function retrieves the attributes of the memory region specified by
BaseAddress and Length. If different attributes are got from different part