[edk2-devel] [PATCH v2 3/3] UefiCpuPkg/PiSmmCpu: Enable 5 level paging when CPU supports
Ni, Ray
ray.ni at intel.com
Wed Jul 3 06:54:16 UTC 2019
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1946
The patch changes SMM environment to use 5 level paging when CPU
supports it.
Signed-off-by: Ray Ni <ray.ni at intel.com>
Cc: Eric Dong <eric.dong at intel.com>
Regression-tested-by: Laszlo Ersek <lersek at redhat.com>
---
.../PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c | 20 +-
UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c | 272 ++++++----
UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c | 485 ++++++++++++------
UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm | 12 +
.../PiSmmCpuDxeSmm/X64/SmmProfileArch.c | 72 ++-
5 files changed, 561 insertions(+), 300 deletions(-)
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
index 069be3aaa5..55090e9c3e 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmCpuMemoryManagement.c
@@ -125,18 +125,36 @@ GetPageTableEntry (
UINTN Index2;
UINTN Index3;
UINTN Index4;
+ UINTN Index5;
UINT64 *L1PageTable;
UINT64 *L2PageTable;
UINT64 *L3PageTable;
UINT64 *L4PageTable;
+ UINT64 *L5PageTable;
+ IA32_CR4 Cr4;
+ BOOLEAN Enable5LevelPaging;
+ 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;
Index1 = ((UINTN)Address >> 12) & PAGING_PAE_INDEX_MASK;
+ Cr4.UintN = AsmReadCr4 ();
+ Enable5LevelPaging = (BOOLEAN) (Cr4.Bits.LA57 == 1);
+
if (sizeof(UINTN) == sizeof(UINT64)) {
- L4PageTable = (UINT64 *)GetPageTableBase ();
+ if (Enable5LevelPaging) {
+ L5PageTable = (UINT64 *)GetPageTableBase ();
+ if (L5PageTable[Index5] == 0) {
+ *PageAttribute = PageNone;
+ return NULL;
+ }
+
+ L4PageTable = (UINT64 *)(UINTN)(L5PageTable[Index5] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
+ } else {
+ L4PageTable = (UINT64 *)GetPageTableBase ();
+ }
if (L4PageTable[Index4] == 0) {
*PageAttribute = PageNone;
return NULL;
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
index e2b6a2d9b2..c5131526f0 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/SmmProfile.c
@@ -534,43 +534,78 @@ InitPaging (
VOID
)
{
+ UINT64 Pml5Entry;
+ UINT64 Pml4Entry;
+ UINT64 *Pml5;
UINT64 *Pml4;
UINT64 *Pdpt;
UINT64 *Pd;
UINT64 *Pt;
UINTN Address;
+ UINTN Pml5Index;
UINTN Pml4Index;
UINTN PdptIndex;
UINTN PdIndex;
UINTN PtIndex;
UINTN NumberOfPdptEntries;
UINTN NumberOfPml4Entries;
+ UINTN NumberOfPml5Entries;
UINTN SizeOfMemorySpace;
BOOLEAN Nx;
+ IA32_CR4 Cr4;
+ BOOLEAN Enable5LevelPaging;
+
+ Cr4.UintN = AsmReadCr4 ();
+ Enable5LevelPaging = (BOOLEAN) (Cr4.Bits.LA57 == 1);
if (sizeof (UINTN) == sizeof (UINT64)) {
- Pml4 = (UINT64*)(UINTN)mSmmProfileCr3;
+ if (!Enable5LevelPaging) {
+ Pml5Entry = (UINTN) mSmmProfileCr3 | IA32_PG_P;
+ Pml5 = &Pml5Entry;
+ } else {
+ Pml5 = (UINT64*) (UINTN) mSmmProfileCr3;
+ }
SizeOfMemorySpace = HighBitSet64 (gPhyMask) + 1;
//
// Calculate the table entries of PML4E and PDPTE.
//
- if (SizeOfMemorySpace <= 39 ) {
- NumberOfPml4Entries = 1;
- NumberOfPdptEntries = (UINT32)LShiftU64 (1, (SizeOfMemorySpace - 30));
- } else {
- NumberOfPml4Entries = (UINT32)LShiftU64 (1, (SizeOfMemorySpace - 39));
- NumberOfPdptEntries = 512;
+ NumberOfPml5Entries = 1;
+ if (SizeOfMemorySpace > 48) {
+ NumberOfPml5Entries = (UINTN) LShiftU64 (1, SizeOfMemorySpace - 48);
+ SizeOfMemorySpace = 48;
}
- } else {
+
NumberOfPml4Entries = 1;
+ if (SizeOfMemorySpace > 39) {
+ NumberOfPml4Entries = (UINTN) LShiftU64 (1, SizeOfMemorySpace - 39);
+ SizeOfMemorySpace = 39;
+ }
+
+ NumberOfPdptEntries = 1;
+ ASSERT (SizeOfMemorySpace > 30);
+ NumberOfPdptEntries = (UINTN) LShiftU64 (1, SizeOfMemorySpace - 30);
+ } else {
+ Pml4Entry = (UINTN) mSmmProfileCr3 | IA32_PG_P;
+ Pml4 = &Pml4Entry;
+ Pml5Entry = (UINTN) Pml4 | IA32_PG_P;
+ Pml5 = &Pml5Entry;
+ NumberOfPml5Entries = 1;
+ NumberOfPml4Entries = 1;
NumberOfPdptEntries = 4;
}
//
// Go through page table and change 2MB-page into 4KB-page.
//
- for (Pml4Index = 0; Pml4Index < NumberOfPml4Entries; Pml4Index++) {
- if (sizeof (UINTN) == sizeof (UINT64)) {
+ for (Pml5Index = 0; Pml5Index < NumberOfPml5Entries; Pml5Index++) {
+ if ((Pml5[Pml5Index] & IA32_PG_P) == 0) {
+ //
+ // If PML5 entry does not exist, skip it
+ //
+ continue;
+ }
+ Pml4 = (UINT64 *) (UINTN) (Pml5[Pml5Index] & PHYSICAL_ADDRESS_MASK);
+ for (Pml4Index = 0; Pml4Index < NumberOfPml4Entries; Pml4Index++) {
if ((Pml4[Pml4Index] & IA32_PG_P) == 0) {
//
// If PML4 entry does not exist, skip it
@@ -578,63 +613,76 @@ InitPaging (
continue;
}
Pdpt = (UINT64 *)(UINTN)(Pml4[Pml4Index] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- } else {
- Pdpt = (UINT64*)(UINTN)mSmmProfileCr3;
- }
- for (PdptIndex = 0; PdptIndex < NumberOfPdptEntries; PdptIndex++, Pdpt++) {
- if ((*Pdpt & IA32_PG_P) == 0) {
- //
- // If PDPT entry does not exist, skip it
- //
- continue;
- }
- if ((*Pdpt & IA32_PG_PS) != 0) {
- //
- // This is 1G entry, skip it
- //
- continue;
- }
- Pd = (UINT64 *)(UINTN)(*Pdpt & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- if (Pd == 0) {
- continue;
- }
- for (PdIndex = 0; PdIndex < SIZE_4KB / sizeof (*Pd); PdIndex++, Pd++) {
- if ((*Pd & IA32_PG_P) == 0) {
+ for (PdptIndex = 0; PdptIndex < NumberOfPdptEntries; PdptIndex++, Pdpt++) {
+ if ((*Pdpt & IA32_PG_P) == 0) {
+ //
+ // If PDPT entry does not exist, skip it
+ //
+ continue;
+ }
+ if ((*Pdpt & IA32_PG_PS) != 0) {
//
- // If PD entry does not exist, skip it
+ // This is 1G entry, skip it
//
continue;
}
- Address = (((PdptIndex << 9) + PdIndex) << 21);
+ Pd = (UINT64 *)(UINTN)(*Pdpt & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
+ if (Pd == 0) {
+ continue;
+ }
+ for (PdIndex = 0; PdIndex < SIZE_4KB / sizeof (*Pd); PdIndex++, Pd++) {
+ if ((*Pd & IA32_PG_P) == 0) {
+ //
+ // If PD entry does not exist, skip it
+ //
+ continue;
+ }
+ Address = (UINTN) LShiftU64 (
+ LShiftU64 (
+ LShiftU64 ((Pml5Index << 9) + Pml4Index, 9) + PdptIndex,
+ 9
+ ) + PdIndex,
+ 21
+ );
- //
- // If it is 2M page, check IsAddressSplit()
- //
- if (((*Pd & IA32_PG_PS) != 0) && IsAddressSplit (Address)) {
//
- // Based on current page table, create 4KB page table for split area.
+ // If it is 2M page, check IsAddressSplit()
//
- ASSERT (Address == (*Pd & PHYSICAL_ADDRESS_MASK));
+ if (((*Pd & IA32_PG_PS) != 0) && IsAddressSplit (Address)) {
+ //
+ // Based on current page table, create 4KB page table for split area.
+ //
+ ASSERT (Address == (*Pd & PHYSICAL_ADDRESS_MASK));
+
+ Pt = AllocatePageTableMemory (1);
+ ASSERT (Pt != NULL);
- Pt = AllocatePageTableMemory (1);
- ASSERT (Pt != NULL);
+ *Pd = (UINTN) Pt | IA32_PG_RW | IA32_PG_P;
- // Split it
- for (PtIndex = 0; PtIndex < SIZE_4KB / sizeof(*Pt); PtIndex++) {
- Pt[PtIndex] = Address + ((PtIndex << 12) | mAddressEncMask | PAGE_ATTRIBUTE_BITS);
- } // end for PT
- *Pd = (UINT64)(UINTN)Pt | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
- } // end if IsAddressSplit
- } // end for PD
- } // end for PDPT
- } // end for PML4
+ // Split it
+ for (PtIndex = 0; PtIndex < SIZE_4KB / sizeof(*Pt); PtIndex++, Pt++) {
+ *Pt = Address + ((PtIndex << 12) | mAddressEncMask | PAGE_ATTRIBUTE_BITS);
+ } // end for PT
+ *Pd = (UINT64)(UINTN)Pt | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
+ } // end if IsAddressSplit
+ } // end for PD
+ } // end for PDPT
+ } // end for PML4
+ } // end for PML5
//
// Go through page table and set several page table entries to absent or execute-disable.
//
DEBUG ((EFI_D_INFO, "Patch page table start ...\n"));
- for (Pml4Index = 0; Pml4Index < NumberOfPml4Entries; Pml4Index++) {
- if (sizeof (UINTN) == sizeof (UINT64)) {
+ for (Pml5Index = 0; Pml5Index < NumberOfPml5Entries; Pml5Index++) {
+ if ((Pml5[Pml5Index] & IA32_PG_P) == 0) {
+ //
+ // If PML5 entry does not exist, skip it
+ //
+ continue;
+ }
+ Pml4 = (UINT64 *) (UINTN) (Pml5[Pml5Index] & PHYSICAL_ADDRESS_MASK);
+ for (Pml4Index = 0; Pml4Index < NumberOfPml4Entries; Pml4Index++) {
if ((Pml4[Pml4Index] & IA32_PG_P) == 0) {
//
// If PML4 entry does not exist, skip it
@@ -642,69 +690,73 @@ InitPaging (
continue;
}
Pdpt = (UINT64 *)(UINTN)(Pml4[Pml4Index] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- } else {
- Pdpt = (UINT64*)(UINTN)mSmmProfileCr3;
- }
- for (PdptIndex = 0; PdptIndex < NumberOfPdptEntries; PdptIndex++, Pdpt++) {
- if ((*Pdpt & IA32_PG_P) == 0) {
- //
- // If PDPT entry does not exist, skip it
- //
- continue;
- }
- if ((*Pdpt & IA32_PG_PS) != 0) {
- //
- // This is 1G entry, set NX bit and skip it
- //
- if (mXdSupported) {
- *Pdpt = *Pdpt | IA32_PG_NX;
+ for (PdptIndex = 0; PdptIndex < NumberOfPdptEntries; PdptIndex++, Pdpt++) {
+ if ((*Pdpt & IA32_PG_P) == 0) {
+ //
+ // If PDPT entry does not exist, skip it
+ //
+ continue;
}
- continue;
- }
- Pd = (UINT64 *)(UINTN)(*Pdpt & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- if (Pd == 0) {
- continue;
- }
- for (PdIndex = 0; PdIndex < SIZE_4KB / sizeof (*Pd); PdIndex++, Pd++) {
- if ((*Pd & IA32_PG_P) == 0) {
+ if ((*Pdpt & IA32_PG_PS) != 0) {
//
- // If PD entry does not exist, skip it
+ // This is 1G entry, set NX bit and skip it
//
+ if (mXdSupported) {
+ *Pdpt = *Pdpt | IA32_PG_NX;
+ }
continue;
}
- Address = (((PdptIndex << 9) + PdIndex) << 21);
-
- if ((*Pd & IA32_PG_PS) != 0) {
- // 2MB page
-
- if (!IsAddressValid (Address, &Nx)) {
+ Pd = (UINT64 *)(UINTN)(*Pdpt & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
+ if (Pd == 0) {
+ continue;
+ }
+ for (PdIndex = 0; PdIndex < SIZE_4KB / sizeof (*Pd); PdIndex++, Pd++) {
+ if ((*Pd & IA32_PG_P) == 0) {
//
- // Patch to remove Present flag and RW flag
+ // If PD entry does not exist, skip it
//
- *Pd = *Pd & (INTN)(INT32)(~PAGE_ATTRIBUTE_BITS);
- }
- if (Nx && mXdSupported) {
- *Pd = *Pd | IA32_PG_NX;
- }
- } else {
- // 4KB page
- Pt = (UINT64 *)(UINTN)(*Pd & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- if (Pt == 0) {
continue;
}
- for (PtIndex = 0; PtIndex < SIZE_4KB / sizeof(*Pt); PtIndex++, Pt++) {
+ Address = (UINTN) LShiftU64 (
+ LShiftU64 (
+ LShiftU64 ((Pml5Index << 9) + Pml4Index, 9) + PdptIndex,
+ 9
+ ) + PdIndex,
+ 21
+ );
+
+ if ((*Pd & IA32_PG_PS) != 0) {
+ // 2MB page
+
if (!IsAddressValid (Address, &Nx)) {
- *Pt = *Pt & (INTN)(INT32)(~PAGE_ATTRIBUTE_BITS);
+ //
+ // Patch to remove Present flag and RW flag
+ //
+ *Pd = *Pd & (INTN)(INT32)(~PAGE_ATTRIBUTE_BITS);
}
if (Nx && mXdSupported) {
- *Pt = *Pt | IA32_PG_NX;
+ *Pd = *Pd | IA32_PG_NX;
+ }
+ } else {
+ // 4KB page
+ Pt = (UINT64 *)(UINTN)(*Pd & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
+ if (Pt == 0) {
+ continue;
}
- Address += SIZE_4KB;
- } // end for PT
- } // end if PS
- } // end for PD
- } // end for PDPT
- } // end for PML4
+ for (PtIndex = 0; PtIndex < SIZE_4KB / sizeof(*Pt); PtIndex++, Pt++) {
+ if (!IsAddressValid (Address, &Nx)) {
+ *Pt = *Pt & (INTN)(INT32)(~PAGE_ATTRIBUTE_BITS);
+ }
+ if (Nx && mXdSupported) {
+ *Pt = *Pt | IA32_PG_NX;
+ }
+ Address += SIZE_4KB;
+ } // end for PT
+ } // end if PS
+ } // end for PD
+ } // end for PDPT
+ } // end for PML4
+ } // end for PML5
//
// Flush TLB
@@ -1156,6 +1208,20 @@ RestorePageTableBelow4G (
{
UINTN PTIndex;
UINTN PFIndex;
+ IA32_CR4 Cr4;
+ BOOLEAN Enable5LevelPaging;
+
+ Cr4.UintN = AsmReadCr4 ();
+ Enable5LevelPaging = (BOOLEAN) (Cr4.Bits.LA57 == 1);
+
+ //
+ // PML5
+ //
+ if (Enable5LevelPaging) {
+ PTIndex = (UINTN)BitFieldRead64 (PFAddress, 48, 56);
+ ASSERT (PageTable[PTIndex] != 0);
+ PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & PHYSICAL_ADDRESS_MASK);
+ }
//
// PML4
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
index 3d5d663d99..c31160735a 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c
@@ -16,6 +16,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
LIST_ENTRY mPagePool = INITIALIZE_LIST_HEAD_VARIABLE (mPagePool);
BOOLEAN m1GPageTableSupport = FALSE;
BOOLEAN mCpuSmmStaticPageTable;
+BOOLEAN m5LevelPagingSupport;
+X86_ASSEMBLY_PATCH_LABEL gPatch5LevelPagingSupport;
/**
Disable CET.
@@ -60,6 +62,31 @@ Is1GPageSupport (
return FALSE;
}
+/**
+ Check if 5-level paging is supported by processor or not.
+
+ @retval TRUE 5-level paging is supported.
+ @retval FALSE 5-level paging is not supported.
+
+**/
+BOOLEAN
+Is5LevelPagingSupport (
+ VOID
+ )
+{
+ CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_ECX EcxFlags;
+
+ AsmCpuidEx (
+ CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS,
+ CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_SUB_LEAF_INFO,
+ NULL,
+ NULL,
+ &EcxFlags.Uint32,
+ NULL
+ );
+ return (BOOLEAN) (EcxFlags.Bits.FiveLevelPage != 0);
+}
+
/**
Set sub-entries number in entry.
@@ -130,14 +157,6 @@ CalculateMaximumSupportAddress (
PhysicalAddressBits = 36;
}
}
-
- //
- // IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses.
- //
- ASSERT (PhysicalAddressBits <= 52);
- if (PhysicalAddressBits > 48) {
- PhysicalAddressBits = 48;
- }
return PhysicalAddressBits;
}
@@ -152,89 +171,137 @@ SetStaticPageTable (
)
{
UINT64 PageAddress;
+ UINTN NumberOfPml5EntriesNeeded;
UINTN NumberOfPml4EntriesNeeded;
UINTN NumberOfPdpEntriesNeeded;
+ UINTN IndexOfPml5Entries;
UINTN IndexOfPml4Entries;
UINTN IndexOfPdpEntries;
UINTN IndexOfPageDirectoryEntries;
+ UINT64 *PageMapLevel5Entry;
UINT64 *PageMapLevel4Entry;
UINT64 *PageMap;
UINT64 *PageDirectoryPointerEntry;
UINT64 *PageDirectory1GEntry;
UINT64 *PageDirectoryEntry;
- if (mPhysicalAddressBits <= 39 ) {
- NumberOfPml4EntriesNeeded = 1;
- NumberOfPdpEntriesNeeded = (UINT32)LShiftU64 (1, (mPhysicalAddressBits - 30));
- } else {
- NumberOfPml4EntriesNeeded = (UINT32)LShiftU64 (1, (mPhysicalAddressBits - 39));
- NumberOfPdpEntriesNeeded = 512;
+ //
+ // IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses
+ // when 5-Level Paging is disabled.
+ //
+ ASSERT (mPhysicalAddressBits <= 52);
+ if (!m5LevelPagingSupport && mPhysicalAddressBits > 48) {
+ mPhysicalAddressBits = 48;
+ }
+
+ NumberOfPml5EntriesNeeded = 1;
+ if (mPhysicalAddressBits > 48) {
+ NumberOfPml5EntriesNeeded = (UINTN) LShiftU64 (1, mPhysicalAddressBits - 48);
+ mPhysicalAddressBits = 48;
+ }
+
+ NumberOfPml4EntriesNeeded = 1;
+ if (mPhysicalAddressBits > 39) {
+ NumberOfPml4EntriesNeeded = (UINTN) LShiftU64 (1, mPhysicalAddressBits - 39);
+ mPhysicalAddressBits = 39;
}
+ NumberOfPdpEntriesNeeded = 1;
+ ASSERT (mPhysicalAddressBits > 30);
+ NumberOfPdpEntriesNeeded = (UINTN) LShiftU64 (1, mPhysicalAddressBits - 30);
+
//
// By architecture only one PageMapLevel4 exists - so lets allocate storage for it.
//
PageMap = (VOID *) PageTable;
PageMapLevel4Entry = PageMap;
- PageAddress = 0;
- for (IndexOfPml4Entries = 0; IndexOfPml4Entries < NumberOfPml4EntriesNeeded; IndexOfPml4Entries++, PageMapLevel4Entry++) {
+ PageMapLevel5Entry = NULL;
+ if (m5LevelPagingSupport) {
//
- // Each PML4 entry points to a page of Page Directory Pointer entries.
+ // By architecture only one PageMapLevel5 exists - so lets allocate storage for it.
//
- PageDirectoryPointerEntry = (UINT64 *) ((*PageMapLevel4Entry) & ~mAddressEncMask & gPhyMask);
- if (PageDirectoryPointerEntry == NULL) {
- PageDirectoryPointerEntry = AllocatePageTableMemory (1);
- ASSERT(PageDirectoryPointerEntry != NULL);
- ZeroMem (PageDirectoryPointerEntry, EFI_PAGES_TO_SIZE(1));
+ PageMapLevel5Entry = PageMap;
+ }
+ PageAddress = 0;
- *PageMapLevel4Entry = (UINT64)(UINTN)PageDirectoryPointerEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
+ for ( IndexOfPml5Entries = 0
+ ; IndexOfPml5Entries < NumberOfPml5EntriesNeeded
+ ; IndexOfPml5Entries++, PageMapLevel5Entry++) {
+ //
+ // Each PML5 entry points to a page of PML4 entires.
+ // So lets allocate space for them and fill them in in the IndexOfPml4Entries loop.
+ // When 5-Level Paging is disabled, below allocation happens only once.
+ //
+ if (m5LevelPagingSupport) {
+ PageMapLevel4Entry = (UINT64 *) ((*PageMapLevel5Entry) & ~mAddressEncMask & gPhyMask);
+ if (PageMapLevel4Entry == NULL) {
+ PageMapLevel4Entry = AllocatePageTableMemory (1);
+ ASSERT(PageMapLevel4Entry != NULL);
+ ZeroMem (PageMapLevel4Entry, EFI_PAGES_TO_SIZE(1));
+
+ *PageMapLevel5Entry = (UINT64)(UINTN)PageMapLevel4Entry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
+ }
}
- if (m1GPageTableSupport) {
- PageDirectory1GEntry = PageDirectoryPointerEntry;
- for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectory1GEntry++, PageAddress += SIZE_1GB) {
- if (IndexOfPml4Entries == 0 && IndexOfPageDirectoryEntries < 4) {
- //
- // Skip the < 4G entries
- //
- continue;
- }
- //
- // Fill in the Page Directory entries
- //
- *PageDirectory1GEntry = PageAddress | mAddressEncMask | IA32_PG_PS | PAGE_ATTRIBUTE_BITS;
+ for (IndexOfPml4Entries = 0; IndexOfPml4Entries < (NumberOfPml5EntriesNeeded == 1 ? NumberOfPml4EntriesNeeded : 512); IndexOfPml4Entries++, PageMapLevel4Entry++) {
+ //
+ // Each PML4 entry points to a page of Page Directory Pointer entries.
+ //
+ PageDirectoryPointerEntry = (UINT64 *) ((*PageMapLevel4Entry) & ~mAddressEncMask & gPhyMask);
+ if (PageDirectoryPointerEntry == NULL) {
+ PageDirectoryPointerEntry = AllocatePageTableMemory (1);
+ ASSERT(PageDirectoryPointerEntry != NULL);
+ ZeroMem (PageDirectoryPointerEntry, EFI_PAGES_TO_SIZE(1));
+
+ *PageMapLevel4Entry = (UINT64)(UINTN)PageDirectoryPointerEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
}
- } else {
- PageAddress = BASE_4GB;
- for (IndexOfPdpEntries = 0; IndexOfPdpEntries < NumberOfPdpEntriesNeeded; IndexOfPdpEntries++, PageDirectoryPointerEntry++) {
- if (IndexOfPml4Entries == 0 && IndexOfPdpEntries < 4) {
- //
- // Skip the < 4G entries
- //
- continue;
- }
- //
- // Each Directory Pointer entries points to a page of Page Directory entires.
- // So allocate space for them and fill them in in the IndexOfPageDirectoryEntries loop.
- //
- PageDirectoryEntry = (UINT64 *) ((*PageDirectoryPointerEntry) & ~mAddressEncMask & gPhyMask);
- if (PageDirectoryEntry == NULL) {
- PageDirectoryEntry = AllocatePageTableMemory (1);
- ASSERT(PageDirectoryEntry != NULL);
- ZeroMem (PageDirectoryEntry, EFI_PAGES_TO_SIZE(1));
+ if (m1GPageTableSupport) {
+ PageDirectory1GEntry = PageDirectoryPointerEntry;
+ for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectory1GEntry++, PageAddress += SIZE_1GB) {
+ if (IndexOfPml4Entries == 0 && IndexOfPageDirectoryEntries < 4) {
+ //
+ // Skip the < 4G entries
+ //
+ continue;
+ }
//
- // Fill in a Page Directory Pointer Entries
+ // Fill in the Page Directory entries
//
- *PageDirectoryPointerEntry = (UINT64)(UINTN)PageDirectoryEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
+ *PageDirectory1GEntry = PageAddress | mAddressEncMask | IA32_PG_PS | PAGE_ATTRIBUTE_BITS;
}
-
- for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectoryEntry++, PageAddress += SIZE_2MB) {
+ } else {
+ PageAddress = BASE_4GB;
+ for (IndexOfPdpEntries = 0; IndexOfPdpEntries < (NumberOfPml4EntriesNeeded == 1 ? NumberOfPdpEntriesNeeded : 512); IndexOfPdpEntries++, PageDirectoryPointerEntry++) {
+ if (IndexOfPml4Entries == 0 && IndexOfPdpEntries < 4) {
+ //
+ // Skip the < 4G entries
+ //
+ continue;
+ }
//
- // Fill in the Page Directory entries
+ // Each Directory Pointer entries points to a page of Page Directory entires.
+ // So allocate space for them and fill them in in the IndexOfPageDirectoryEntries loop.
//
- *PageDirectoryEntry = PageAddress | mAddressEncMask | IA32_PG_PS | PAGE_ATTRIBUTE_BITS;
+ PageDirectoryEntry = (UINT64 *) ((*PageDirectoryPointerEntry) & ~mAddressEncMask & gPhyMask);
+ if (PageDirectoryEntry == NULL) {
+ PageDirectoryEntry = AllocatePageTableMemory (1);
+ ASSERT(PageDirectoryEntry != NULL);
+ ZeroMem (PageDirectoryEntry, EFI_PAGES_TO_SIZE(1));
+
+ //
+ // Fill in a Page Directory Pointer Entries
+ //
+ *PageDirectoryPointerEntry = (UINT64)(UINTN)PageDirectoryEntry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
+ }
+
+ for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectoryEntry++, PageAddress += SIZE_2MB) {
+ //
+ // Fill in the Page Directory entries
+ //
+ *PageDirectoryEntry = PageAddress | mAddressEncMask | IA32_PG_PS | PAGE_ATTRIBUTE_BITS;
+ }
}
}
}
@@ -259,6 +326,8 @@ SmmInitPageTable (
UINTN PageFaultHandlerHookAddress;
IA32_IDT_GATE_DESCRIPTOR *IdtEntry;
EFI_STATUS Status;
+ UINT64 *Pml4Entry;
+ UINT64 *Pml5Entry;
//
// Initialize spin lock
@@ -266,12 +335,14 @@ SmmInitPageTable (
InitializeSpinLock (mPFLock);
mCpuSmmStaticPageTable = PcdGetBool (PcdCpuSmmStaticPageTable);
- m1GPageTableSupport = Is1GPageSupport ();
- DEBUG ((DEBUG_INFO, "1GPageTableSupport - 0x%x\n", m1GPageTableSupport));
- DEBUG ((DEBUG_INFO, "PcdCpuSmmStaticPageTable - 0x%x\n", mCpuSmmStaticPageTable));
-
- mPhysicalAddressBits = CalculateMaximumSupportAddress ();
- DEBUG ((DEBUG_INFO, "PhysicalAddressBits - 0x%x\n", mPhysicalAddressBits));
+ m1GPageTableSupport = Is1GPageSupport ();
+ m5LevelPagingSupport = Is5LevelPagingSupport ();
+ mPhysicalAddressBits = CalculateMaximumSupportAddress ();
+ PatchInstructionX86 (gPatch5LevelPagingSupport, m5LevelPagingSupport, 1);
+ DEBUG ((DEBUG_INFO, "5LevelPaging Support - %d\n", m5LevelPagingSupport));
+ DEBUG ((DEBUG_INFO, "1GPageTable Support - %d\n", m1GPageTableSupport));
+ DEBUG ((DEBUG_INFO, "PcdCpuSmmStaticPageTable - %d\n", mCpuSmmStaticPageTable));
+ DEBUG ((DEBUG_INFO, "PhysicalAddressBits - %d\n", mPhysicalAddressBits));
//
// Generate PAE page table for the first 4GB memory space
//
@@ -288,15 +359,30 @@ SmmInitPageTable (
//
// Fill Page-Table-Level4 (PML4) entry
//
- PTEntry = (UINT64*)AllocatePageTableMemory (1);
- ASSERT (PTEntry != NULL);
- *PTEntry = Pages | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
- ZeroMem (PTEntry + 1, EFI_PAGE_SIZE - sizeof (*PTEntry));
+ Pml4Entry = (UINT64*)AllocatePageTableMemory (1);
+ ASSERT (Pml4Entry != NULL);
+ *Pml4Entry = Pages | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
+ ZeroMem (Pml4Entry + 1, EFI_PAGE_SIZE - sizeof (*Pml4Entry));
//
// Set sub-entries number
//
- SetSubEntriesNum (PTEntry, 3);
+ SetSubEntriesNum (Pml4Entry, 3);
+ PTEntry = Pml4Entry;
+
+ if (m5LevelPagingSupport) {
+ //
+ // Fill PML5 entry
+ //
+ Pml5Entry = (UINT64*)AllocatePageTableMemory (1);
+ *Pml5Entry = (UINTN) Pml4Entry | mAddressEncMask | PAGE_ATTRIBUTE_BITS;
+ ZeroMem (Pml5Entry + 1, EFI_PAGE_SIZE - sizeof (*Pml5Entry));
+ //
+ // Set sub-entries number
+ //
+ SetSubEntriesNum (Pml5Entry, 1);
+ PTEntry = Pml5Entry;
+ }
if (mCpuSmmStaticPageTable) {
SetStaticPageTable ((UINTN)PTEntry);
@@ -344,7 +430,7 @@ SmmInitPageTable (
}
//
- // Return the address of PML4 (to set CR3)
+ // Return the address of PML4/PML5 (to set CR3)
//
return (UINT32)(UINTN)PTEntry;
}
@@ -436,12 +522,16 @@ ReclaimPages (
VOID
)
{
+ UINT64 Pml5Entry;
+ UINT64 *Pml5;
UINT64 *Pml4;
UINT64 *Pdpt;
UINT64 *Pdt;
+ UINTN Pml5Index;
UINTN Pml4Index;
UINTN PdptIndex;
UINTN PdtIndex;
+ UINTN MinPml5;
UINTN MinPml4;
UINTN MinPdpt;
UINTN MinPdt;
@@ -451,120 +541,147 @@ ReclaimPages (
BOOLEAN PML4EIgnore;
BOOLEAN PDPTEIgnore;
UINT64 *ReleasePageAddress;
+ IA32_CR4 Cr4;
+ BOOLEAN Enable5LevelPaging;
Pml4 = NULL;
Pdpt = NULL;
Pdt = NULL;
MinAcc = (UINT64)-1;
MinPml4 = (UINTN)-1;
+ MinPml5 = (UINTN)-1;
MinPdpt = (UINTN)-1;
MinPdt = (UINTN)-1;
Acc = 0;
ReleasePageAddress = 0;
+ Cr4.UintN = AsmReadCr4 ();
+ Enable5LevelPaging = (BOOLEAN) (Cr4.Bits.LA57 == 1);
+ Pml5 = (UINT64*)(UINTN)(AsmReadCr3 () & gPhyMask);
+
+ if (!Enable5LevelPaging) {
+ //
+ // Create one fake PML5 entry for 4-Level Paging
+ // so that the page table parsing logic only handles 5-Level page structure.
+ //
+ Pml5Entry = (UINTN) Pml5 | IA32_PG_P;
+ Pml5 = &Pml5Entry;
+ }
+
//
// First, find the leaf entry has the smallest access record value
//
- Pml4 = (UINT64*)(UINTN)(AsmReadCr3 () & gPhyMask);
- for (Pml4Index = 0; Pml4Index < EFI_PAGE_SIZE / sizeof (*Pml4); Pml4Index++) {
- if ((Pml4[Pml4Index] & IA32_PG_P) == 0 || (Pml4[Pml4Index] & IA32_PG_PMNT) != 0) {
+ for (Pml5Index = 0; Pml5Index < Enable5LevelPaging ? (EFI_PAGE_SIZE / sizeof (*Pml4)) : 1; Pml5Index++) {
+ if ((Pml5[Pml5Index] & IA32_PG_P) == 0 || (Pml5[Pml5Index] & IA32_PG_PMNT) != 0) {
//
- // If the PML4 entry is not present or is masked, skip it
+ // If the PML5 entry is not present or is masked, skip it
//
continue;
}
- Pdpt = (UINT64*)(UINTN)(Pml4[Pml4Index] & ~mAddressEncMask & gPhyMask);
- PML4EIgnore = FALSE;
- for (PdptIndex = 0; PdptIndex < EFI_PAGE_SIZE / sizeof (*Pdpt); PdptIndex++) {
- if ((Pdpt[PdptIndex] & IA32_PG_P) == 0 || (Pdpt[PdptIndex] & IA32_PG_PMNT) != 0) {
+ Pml4 = (UINT64*)(UINTN)(Pml5[Pml5Index] & gPhyMask);
+ for (Pml4Index = 0; Pml4Index < EFI_PAGE_SIZE / sizeof (*Pml4); Pml4Index++) {
+ if ((Pml4[Pml4Index] & IA32_PG_P) == 0 || (Pml4[Pml4Index] & IA32_PG_PMNT) != 0) {
//
- // If the PDPT entry is not present or is masked, skip it
+ // If the PML4 entry is not present or is masked, skip it
//
- if ((Pdpt[PdptIndex] & IA32_PG_PMNT) != 0) {
- //
- // If the PDPT entry is masked, we will ignore checking the PML4 entry
- //
- PML4EIgnore = TRUE;
- }
continue;
}
- if ((Pdpt[PdptIndex] & IA32_PG_PS) == 0) {
- //
- // It's not 1-GByte pages entry, it should be a PDPT entry,
- // we will not check PML4 entry more
- //
- PML4EIgnore = TRUE;
- Pdt = (UINT64*)(UINTN)(Pdpt[PdptIndex] & ~mAddressEncMask & gPhyMask);
- PDPTEIgnore = FALSE;
- for (PdtIndex = 0; PdtIndex < EFI_PAGE_SIZE / sizeof(*Pdt); PdtIndex++) {
- if ((Pdt[PdtIndex] & IA32_PG_P) == 0 || (Pdt[PdtIndex] & IA32_PG_PMNT) != 0) {
+ Pdpt = (UINT64*)(UINTN)(Pml4[Pml4Index] & ~mAddressEncMask & gPhyMask);
+ PML4EIgnore = FALSE;
+ for (PdptIndex = 0; PdptIndex < EFI_PAGE_SIZE / sizeof (*Pdpt); PdptIndex++) {
+ if ((Pdpt[PdptIndex] & IA32_PG_P) == 0 || (Pdpt[PdptIndex] & IA32_PG_PMNT) != 0) {
+ //
+ // If the PDPT entry is not present or is masked, skip it
+ //
+ if ((Pdpt[PdptIndex] & IA32_PG_PMNT) != 0) {
//
- // If the PD entry is not present or is masked, skip it
+ // If the PDPT entry is masked, we will ignore checking the PML4 entry
//
- if ((Pdt[PdtIndex] & IA32_PG_PMNT) != 0) {
+ PML4EIgnore = TRUE;
+ }
+ continue;
+ }
+ if ((Pdpt[PdptIndex] & IA32_PG_PS) == 0) {
+ //
+ // It's not 1-GByte pages entry, it should be a PDPT entry,
+ // we will not check PML4 entry more
+ //
+ PML4EIgnore = TRUE;
+ Pdt = (UINT64*)(UINTN)(Pdpt[PdptIndex] & ~mAddressEncMask & gPhyMask);
+ PDPTEIgnore = FALSE;
+ for (PdtIndex = 0; PdtIndex < EFI_PAGE_SIZE / sizeof(*Pdt); PdtIndex++) {
+ if ((Pdt[PdtIndex] & IA32_PG_P) == 0 || (Pdt[PdtIndex] & IA32_PG_PMNT) != 0) {
+ //
+ // If the PD entry is not present or is masked, skip it
+ //
+ if ((Pdt[PdtIndex] & IA32_PG_PMNT) != 0) {
+ //
+ // If the PD entry is masked, we will not PDPT entry more
+ //
+ PDPTEIgnore = TRUE;
+ }
+ continue;
+ }
+ if ((Pdt[PdtIndex] & IA32_PG_PS) == 0) {
//
- // If the PD entry is masked, we will not PDPT entry more
+ // It's not 2 MByte page table entry, it should be PD entry
+ // we will find the entry has the smallest access record value
//
PDPTEIgnore = TRUE;
+ Acc = GetAndUpdateAccNum (Pdt + PdtIndex);
+ if (Acc < MinAcc) {
+ //
+ // If the PD entry has the smallest access record value,
+ // save the Page address to be released
+ //
+ MinAcc = Acc;
+ MinPml5 = Pml5Index;
+ MinPml4 = Pml4Index;
+ MinPdpt = PdptIndex;
+ MinPdt = PdtIndex;
+ ReleasePageAddress = Pdt + PdtIndex;
+ }
}
- continue;
}
- if ((Pdt[PdtIndex] & IA32_PG_PS) == 0) {
+ if (!PDPTEIgnore) {
//
- // It's not 2 MByte page table entry, it should be PD entry
- // we will find the entry has the smallest access record value
+ // If this PDPT entry has no PDT entries pointer to 4 KByte pages,
+ // it should only has the entries point to 2 MByte Pages
//
- PDPTEIgnore = TRUE;
- Acc = GetAndUpdateAccNum (Pdt + PdtIndex);
+ Acc = GetAndUpdateAccNum (Pdpt + PdptIndex);
if (Acc < MinAcc) {
//
- // If the PD entry has the smallest access record value,
+ // If the PDPT entry has the smallest access record value,
// save the Page address to be released
//
MinAcc = Acc;
+ MinPml5 = Pml5Index;
MinPml4 = Pml4Index;
MinPdpt = PdptIndex;
- MinPdt = PdtIndex;
- ReleasePageAddress = Pdt + PdtIndex;
+ MinPdt = (UINTN)-1;
+ ReleasePageAddress = Pdpt + PdptIndex;
}
}
}
- if (!PDPTEIgnore) {
- //
- // If this PDPT entry has no PDT entries pointer to 4 KByte pages,
- // it should only has the entries point to 2 MByte Pages
- //
- Acc = GetAndUpdateAccNum (Pdpt + PdptIndex);
- if (Acc < MinAcc) {
- //
- // If the PDPT entry has the smallest access record value,
- // save the Page address to be released
- //
- MinAcc = Acc;
- MinPml4 = Pml4Index;
- MinPdpt = PdptIndex;
- MinPdt = (UINTN)-1;
- ReleasePageAddress = Pdpt + PdptIndex;
- }
- }
}
- }
- if (!PML4EIgnore) {
- //
- // If PML4 entry has no the PDPT entry pointer to 2 MByte pages,
- // it should only has the entries point to 1 GByte Pages
- //
- Acc = GetAndUpdateAccNum (Pml4 + Pml4Index);
- if (Acc < MinAcc) {
+ if (!PML4EIgnore) {
//
- // If the PML4 entry has the smallest access record value,
- // save the Page address to be released
+ // If PML4 entry has no the PDPT entry pointer to 2 MByte pages,
+ // it should only has the entries point to 1 GByte Pages
//
- MinAcc = Acc;
- MinPml4 = Pml4Index;
- MinPdpt = (UINTN)-1;
- MinPdt = (UINTN)-1;
- ReleasePageAddress = Pml4 + Pml4Index;
+ Acc = GetAndUpdateAccNum (Pml4 + Pml4Index);
+ if (Acc < MinAcc) {
+ //
+ // If the PML4 entry has the smallest access record value,
+ // save the Page address to be released
+ //
+ MinAcc = Acc;
+ MinPml5 = Pml5Index;
+ MinPml4 = Pml4Index;
+ MinPdpt = (UINTN)-1;
+ MinPdt = (UINTN)-1;
+ ReleasePageAddress = Pml4 + Pml4Index;
+ }
}
}
}
@@ -588,6 +705,7 @@ ReclaimPages (
//
// If 4 KByte Page Table is released, check the PDPT entry
//
+ Pml4 = (UINT64 *) (UINTN) (Pml5[MinPml5] & gPhyMask);
Pdpt = (UINT64*)(UINTN)(Pml4[MinPml4] & ~mAddressEncMask & gPhyMask);
SubEntriesNum = GetSubEntriesNum(Pdpt + MinPdpt);
if (SubEntriesNum == 0) {
@@ -679,7 +797,7 @@ SmiDefaultPFHandler (
)
{
UINT64 *PageTable;
- UINT64 *Pml4;
+ UINT64 *PageTableTop;
UINT64 PFAddress;
UINTN StartBit;
UINTN EndBit;
@@ -690,6 +808,8 @@ SmiDefaultPFHandler (
UINTN PageAttribute;
EFI_STATUS Status;
UINT64 *UpperEntry;
+ BOOLEAN Enable5LevelPaging;
+ IA32_CR4 Cr4;
//
// Set default SMM page attribute
@@ -699,9 +819,12 @@ SmiDefaultPFHandler (
PageAttribute = 0;
EndBit = 0;
- Pml4 = (UINT64*)(AsmReadCr3 () & gPhyMask);
+ PageTableTop = (UINT64*)(AsmReadCr3 () & gPhyMask);
PFAddress = AsmReadCr2 ();
+ Cr4.UintN = AsmReadCr4 ();
+ Enable5LevelPaging = (BOOLEAN) (Cr4.Bits.LA57 != 0);
+
Status = GetPlatformPageTableAttribute (PFAddress, &PageSize, &NumOfPages, &PageAttribute);
//
// If platform not support page table attribute, set default SMM page attribute
@@ -755,9 +878,9 @@ SmiDefaultPFHandler (
}
for (Index = 0; Index < NumOfPages; Index++) {
- PageTable = Pml4;
+ PageTable = PageTableTop;
UpperEntry = NULL;
- for (StartBit = 39; StartBit > EndBit; StartBit -= 9) {
+ for (StartBit = Enable5LevelPaging ? 48 : 39; StartBit > EndBit; StartBit -= 9) {
PTIndex = BitFieldRead64 (PFAddress, StartBit, StartBit + 8);
if ((PageTable[PTIndex] & IA32_PG_P) == 0) {
//
@@ -941,13 +1064,20 @@ SetPageTableAttributes (
UINTN Index2;
UINTN Index3;
UINTN Index4;
+ UINTN Index5;
UINT64 *L1PageTable;
UINT64 *L2PageTable;
UINT64 *L3PageTable;
UINT64 *L4PageTable;
+ UINT64 *L5PageTable;
BOOLEAN IsSplitted;
BOOLEAN PageTableSplitted;
BOOLEAN CetEnabled;
+ IA32_CR4 Cr4;
+ BOOLEAN Enable5LevelPaging;
+
+ Cr4.UintN = AsmReadCr4 ();
+ Enable5LevelPaging = (BOOLEAN) (Cr4.Bits.LA57 == 1);
//
// Don't do this if
@@ -991,44 +1121,59 @@ SetPageTableAttributes (
do {
DEBUG ((DEBUG_INFO, "Start...\n"));
PageTableSplitted = FALSE;
-
- L4PageTable = (UINT64 *)GetPageTableBase ();
- SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L4PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
- PageTableSplitted = (PageTableSplitted || IsSplitted);
-
- for (Index4 = 0; Index4 < SIZE_4KB/sizeof(UINT64); Index4++) {
- L3PageTable = (UINT64 *)(UINTN)(L4PageTable[Index4] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
- if (L3PageTable == NULL) {
- continue;
- }
-
- SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L3PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
+ L5PageTable = NULL;
+ if (Enable5LevelPaging) {
+ L5PageTable = (UINT64 *)GetPageTableBase ();
+ SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L5PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
PageTableSplitted = (PageTableSplitted || IsSplitted);
+ }
- for (Index3 = 0; Index3 < SIZE_4KB/sizeof(UINT64); Index3++) {
- if ((L3PageTable[Index3] & IA32_PG_PS) != 0) {
- // 1G
+ for (Index5 = 0; Index5 < (Enable5LevelPaging ? SIZE_4KB/sizeof(UINT64) : 1); Index5++) {
+ if (Enable5LevelPaging) {
+ L4PageTable = (UINT64 *)(UINTN)(L5PageTable[Index5] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
+ if (L4PageTable == NULL) {
continue;
}
- L2PageTable = (UINT64 *)(UINTN)(L3PageTable[Index3] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
- if (L2PageTable == NULL) {
+ } else {
+ L4PageTable = (UINT64 *)GetPageTableBase ();
+ }
+ SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L4PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
+ PageTableSplitted = (PageTableSplitted || IsSplitted);
+
+ for (Index4 = 0; Index4 < SIZE_4KB/sizeof(UINT64); Index4++) {
+ L3PageTable = (UINT64 *)(UINTN)(L4PageTable[Index4] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
+ if (L3PageTable == NULL) {
continue;
}
- SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L2PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
+ SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L3PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
PageTableSplitted = (PageTableSplitted || IsSplitted);
- for (Index2 = 0; Index2 < SIZE_4KB/sizeof(UINT64); Index2++) {
- if ((L2PageTable[Index2] & IA32_PG_PS) != 0) {
- // 2M
+ for (Index3 = 0; Index3 < SIZE_4KB/sizeof(UINT64); Index3++) {
+ if ((L3PageTable[Index3] & IA32_PG_PS) != 0) {
+ // 1G
continue;
}
- L1PageTable = (UINT64 *)(UINTN)(L2PageTable[Index2] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
- if (L1PageTable == NULL) {
+ L2PageTable = (UINT64 *)(UINTN)(L3PageTable[Index3] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
+ if (L2PageTable == NULL) {
continue;
}
- SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L1PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
+
+ SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L2PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
PageTableSplitted = (PageTableSplitted || IsSplitted);
+
+ for (Index2 = 0; Index2 < SIZE_4KB/sizeof(UINT64); Index2++) {
+ if ((L2PageTable[Index2] & IA32_PG_PS) != 0) {
+ // 2M
+ continue;
+ }
+ L1PageTable = (UINT64 *)(UINTN)(L2PageTable[Index2] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
+ if (L1PageTable == NULL) {
+ continue;
+ }
+ SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L1PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
+ PageTableSplitted = (PageTableSplitted || IsSplitted);
+ }
}
}
}
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm
index 741e4b7da2..271492a9d7 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmiEntry.nasm
@@ -69,6 +69,7 @@ extern ASM_PFX(mXdSupported)
global ASM_PFX(gPatchXdSupported)
global ASM_PFX(gPatchSmiStack)
global ASM_PFX(gPatchSmiCr3)
+global ASM_PFX(gPatch5LevelPagingSupport)
global ASM_PFX(gcSmiHandlerTemplate)
global ASM_PFX(gcSmiHandlerSize)
@@ -124,6 +125,17 @@ ProtFlatMode:
ASM_PFX(gPatchSmiCr3):
mov cr3, rax
mov eax, 0x668 ; as cr4.PGE is not set here, refresh cr3
+
+ mov cl, strict byte 0 ; source operand will be patched
+ASM_PFX(gPatch5LevelPagingSupport):
+ cmp cl, 0
+ je SkipEnable5LevelPaging
+ ;
+ ; Enable 5-Level Paging bit
+ ;
+ bts eax, 12 ; Set LA57 bit (bit #12)
+SkipEnable5LevelPaging:
+
mov cr4, rax ; in PreModifyMtrrs() to flush TLB.
; Load TSS
sub esp, 8 ; reserve room in stack
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmmProfileArch.c b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmmProfileArch.c
index e7c78d36fc..63bae5a913 100644
--- a/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmmProfileArch.c
+++ b/UefiCpuPkg/PiSmmCpuDxeSmm/X64/SmmProfileArch.c
@@ -1,7 +1,7 @@
/** @file
X64 processor specific functions to enable SMM profile.
-Copyright (c) 2012 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2012 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -147,9 +147,14 @@ RestorePageTableAbove4G (
BOOLEAN Existed;
UINTN Index;
UINTN PFIndex;
+ IA32_CR4 Cr4;
+ BOOLEAN Enable5LevelPaging;
ASSERT ((PageTable != NULL) && (IsValidPFAddress != NULL));
+ Cr4.UintN = AsmReadCr4 ();
+ Enable5LevelPaging = (BOOLEAN) (Cr4.Bits.LA57 == 1);
+
//
// If page fault address is 4GB above.
//
@@ -161,38 +166,48 @@ RestorePageTableAbove4G (
//
Existed = FALSE;
PageTable = (UINT64*)(AsmReadCr3 () & PHYSICAL_ADDRESS_MASK);
- PTIndex = BitFieldRead64 (PFAddress, 39, 47);
- if ((PageTable[PTIndex] & IA32_PG_P) != 0) {
- // PML4E
- PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- PTIndex = BitFieldRead64 (PFAddress, 30, 38);
+ PTIndex = 0;
+ if (Enable5LevelPaging) {
+ PTIndex = BitFieldRead64 (PFAddress, 48, 56);
+ }
+ if ((!Enable5LevelPaging) || ((PageTable[PTIndex] & IA32_PG_P) != 0)) {
+ // PML5E
+ if (Enable5LevelPaging) {
+ PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
+ }
+ PTIndex = BitFieldRead64 (PFAddress, 39, 47);
if ((PageTable[PTIndex] & IA32_PG_P) != 0) {
- // PDPTE
+ // PML4E
PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- PTIndex = BitFieldRead64 (PFAddress, 21, 29);
- // PD
- if ((PageTable[PTIndex] & IA32_PG_PS) != 0) {
- //
- // 2MB page
- //
- Address = (UINT64)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- if ((Address & ~((1ull << 21) - 1)) == ((PFAddress & PHYSICAL_ADDRESS_MASK & ~((1ull << 21) - 1)))) {
- Existed = TRUE;
- }
- } else {
- //
- // 4KB page
- //
- PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask& PHYSICAL_ADDRESS_MASK);
- if (PageTable != 0) {
+ PTIndex = BitFieldRead64 (PFAddress, 30, 38);
+ if ((PageTable[PTIndex] & IA32_PG_P) != 0) {
+ // PDPTE
+ PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
+ PTIndex = BitFieldRead64 (PFAddress, 21, 29);
+ // PD
+ if ((PageTable[PTIndex] & IA32_PG_PS) != 0) {
//
- // When there is a valid entry to map to 4KB page, need not create a new entry to map 2MB.
+ // 2MB page
//
- PTIndex = BitFieldRead64 (PFAddress, 12, 20);
Address = (UINT64)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
- if ((Address & ~((1ull << 12) - 1)) == (PFAddress & PHYSICAL_ADDRESS_MASK & ~((1ull << 12) - 1))) {
+ if ((Address & ~((1ull << 21) - 1)) == ((PFAddress & PHYSICAL_ADDRESS_MASK & ~((1ull << 21) - 1)))) {
Existed = TRUE;
}
+ } else {
+ //
+ // 4KB page
+ //
+ PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask& PHYSICAL_ADDRESS_MASK);
+ if (PageTable != 0) {
+ //
+ // When there is a valid entry to map to 4KB page, need not create a new entry to map 2MB.
+ //
+ PTIndex = BitFieldRead64 (PFAddress, 12, 20);
+ Address = (UINT64)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
+ if ((Address & ~((1ull << 12) - 1)) == (PFAddress & PHYSICAL_ADDRESS_MASK & ~((1ull << 12) - 1))) {
+ Existed = TRUE;
+ }
+ }
}
}
}
@@ -221,6 +236,11 @@ RestorePageTableAbove4G (
//
PageTable = (UINT64*)(AsmReadCr3 () & PHYSICAL_ADDRESS_MASK);
PFAddress = AsmReadCr2 ();
+ // PML5E
+ if (Enable5LevelPaging) {
+ PTIndex = BitFieldRead64 (PFAddress, 48, 56);
+ PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
+ }
// PML4E
PTIndex = BitFieldRead64 (PFAddress, 39, 47);
PageTable = (UINT64*)(UINTN)(PageTable[PTIndex] & ~mAddressEncMask & PHYSICAL_ADDRESS_MASK);
--
2.21.0.windows.1
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