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UefiCpuPkg/CpuDxe: Support parsing 5-level page table

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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2008

Signed-off-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Ni, Ray
2019-08-01 17:58:26 +08:00
committed by Eric Dong
parent 29355b4e1a
commit e58aa47432
2 changed files with 19 additions and 2 deletions
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18
UefiCpuPkg/CpuDxe/CpuPageTable.c
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@@ -184,6 +184,9 @@ GetCurrentPagingContext (
if (Cr4.Bits.PAE != 0) {
mPagingContext.ContextData.Ia32.Attributes |= PAGE_TABLE_LIB_PAGING_CONTEXT_IA32_X64_ATTRIBUTES_PAE;
}
if (Cr4.Bits.LA57 != 0) {
mPagingContext.ContextData.Ia32.Attributes |= PAGE_TABLE_LIB_PAGING_CONTEXT_IA32_X64_ATTRIBUTES_5_LEVEL;
}
AsmCpuid (CPUID_EXTENDED_FUNCTION, &RegEax, NULL, NULL, NULL);
if (RegEax >= CPUID_EXTENDED_CPU_SIG) {
@@ -273,14 +276,17 @@ GetPageTableEntry (
UINTN Index2;
UINTN Index3;
UINTN Index4;
UINTN Index5;
UINT64 *L1PageTable;
UINT64 *L2PageTable;
UINT64 *L3PageTable;
UINT64 *L4PageTable;
UINT64 *L5PageTable;
UINT64 AddressEncMask;
ASSERT (PagingContext != NULL);
Index5 = ((UINTN)RShiftU64 (Address, 48)) & PAGING_PAE_INDEX_MASK;
Index4 = ((UINTN)RShiftU64 (Address, 39)) & PAGING_PAE_INDEX_MASK;
Index3 = ((UINTN)Address >> 30) & PAGING_PAE_INDEX_MASK;
Index2 = ((UINTN)Address >> 21) & PAGING_PAE_INDEX_MASK;
@@ -291,7 +297,17 @@ GetPageTableEntry (
AddressEncMask = PcdGet64 (PcdPteMemoryEncryptionAddressOrMask) & PAGING_1G_ADDRESS_MASK_64;
if (PagingContext->MachineType == IMAGE_FILE_MACHINE_X64) {
L4PageTable = (UINT64 *)(UINTN)PagingContext->ContextData.X64.PageTableBase;
if ((PagingContext->ContextData.X64.Attributes & PAGE_TABLE_LIB_PAGING_CONTEXT_IA32_X64_ATTRIBUTES_5_LEVEL) != 0) {
L5PageTable = (UINT64 *)(UINTN)PagingContext->ContextData.X64.PageTableBase;
if (L5PageTable[Index5] == 0) {
*PageAttribute = PageNone;
return NULL;
}
L4PageTable = (UINT64 *)(UINTN)(L5PageTable[Index5] & ~AddressEncMask & PAGING_4K_ADDRESS_MASK_64);
} else {
L4PageTable = (UINT64 *)(UINTN)PagingContext->ContextData.X64.PageTableBase;
}
if (L4PageTable[Index4] == 0) {
*PageAttribute = PageNone;
return NULL;