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MdeModulePkg/DxeIpl: Create 5-level page table for long mode 

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

DxeIpl is responsible to create page table for DXE phase running
either in long mode or in 32bit mode with certain protection
mechanism enabled (refer to ToBuildPageTable()).

The patch updates DxeIpl to create 5-level page table for DXE phase
running in long mode when PcdUse5LevelPageTable is TRUE and CPU
supports 5-level page table.

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>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Ni, Ray 2019-08-01 17:58:29 +08:00 committed by Eric Dong
parent 236d5c66c4
commit b3527dedc3
2 changed files with 154 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
View File

@ -110,6 +110,7 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdNullPointerDetectionPropertyMask ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdUse5LevelPageTable ## SOMETIMES_CONSUMES
[Pcd.IA32,Pcd.X64,Pcd.ARM,Pcd.AARCH64]
gEfiMdeModulePkgTokenSpaceGuid.PcdSetNxForStack ## SOMETIMES_CONSUMES

231
MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c
View File

@ -15,13 +15,14 @@
2) IA-32 Intel(R) Architecture Software Developer's Manual Volume 2:Instruction Set Reference, Intel
3) IA-32 Intel(R) Architecture Software Developer's Manual Volume 3:System Programmer's Guide, Intel
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Register/Intel/Cpuid.h>
#include "DxeIpl.h"
#include "VirtualMemory.h"
@ -626,14 +627,18 @@ CreateIdentityMappingPageTables (
)
{
UINT32 RegEax;
CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_ECX EcxFlags;
UINT32 RegEdx;
UINT8 PhysicalAddressBits;
EFI_PHYSICAL_ADDRESS PageAddress;
UINTN IndexOfPml5Entries;
UINTN IndexOfPml4Entries;
UINTN IndexOfPdpEntries;
UINTN IndexOfPageDirectoryEntries;
UINT32 NumberOfPml5EntriesNeeded;
UINT32 NumberOfPml4EntriesNeeded;
UINT32 NumberOfPdpEntriesNeeded;
PAGE_MAP_AND_DIRECTORY_POINTER *PageMapLevel5Entry;
PAGE_MAP_AND_DIRECTORY_POINTER *PageMapLevel4Entry;
PAGE_MAP_AND_DIRECTORY_POINTER *PageMap;
PAGE_MAP_AND_DIRECTORY_POINTER *PageDirectoryPointerEntry;
@ -641,9 +646,11 @@ CreateIdentityMappingPageTables (
UINTN TotalPagesNum;
UINTN BigPageAddress;
VOID *Hob;
BOOLEAN Page5LevelSupport;
BOOLEAN Page1GSupport;
PAGE_TABLE_1G_ENTRY *PageDirectory1GEntry;
UINT64 AddressEncMask;
IA32_CR4 Cr4;
//
// Make sure AddressEncMask is contained to smallest supported address field
@ -677,33 +684,68 @@ CreateIdentityMappingPageTables (
}
}
Page5LevelSupport = FALSE;
if (PcdGetBool (PcdUse5LevelPageTable)) {
AsmCpuidEx (
CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS, CPUID_STRUCTURED_EXTENDED_FEATURE_FLAGS_SUB_LEAF_INFO, NULL,
&EcxFlags.Uint32, NULL, NULL
);
if (EcxFlags.Bits.FiveLevelPage != 0) {
Page5LevelSupport = TRUE;
}
}
DEBUG ((DEBUG_INFO, "AddressBits=%u 5LevelPaging=%u 1GPage=%u\n", PhysicalAddressBits, Page5LevelSupport, Page1GSupport));
//
// IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses.
// IA-32e paging translates 48-bit linear addresses to 52-bit physical addresses
// when 5-Level Paging is disabled,
// due to either unsupported by HW, or disabled by PCD.
//
ASSERT (PhysicalAddressBits <= 52);
if (PhysicalAddressBits > 48) {
if (!Page5LevelSupport && PhysicalAddressBits > 48) {
PhysicalAddressBits = 48;
}
//
// Calculate the table entries needed.
//
if (PhysicalAddressBits <= 39 ) {
NumberOfPml4EntriesNeeded = 1;
NumberOfPdpEntriesNeeded = (UINT32)LShiftU64 (1, (PhysicalAddressBits - 30));
} else {
NumberOfPml4EntriesNeeded = (UINT32)LShiftU64 (1, (PhysicalAddressBits - 39));
NumberOfPdpEntriesNeeded = 512;
NumberOfPml5EntriesNeeded = 1;
if (PhysicalAddressBits > 48) {
NumberOfPml5EntriesNeeded = (UINT32) LShiftU64 (1, PhysicalAddressBits - 48);
PhysicalAddressBits = 48;
}
NumberOfPml4EntriesNeeded = 1;
if (PhysicalAddressBits > 39) {
NumberOfPml4EntriesNeeded = (UINT32) LShiftU64 (1, PhysicalAddressBits - 39);
PhysicalAddressBits = 39;
}
NumberOfPdpEntriesNeeded = 1;
ASSERT (PhysicalAddressBits > 30);
NumberOfPdpEntriesNeeded = (UINT32) LShiftU64 (1, PhysicalAddressBits - 30);
//
// Pre-allocate big pages to avoid later allocations.
//
if (!Page1GSupport) {
TotalPagesNum = (NumberOfPdpEntriesNeeded + 1) * NumberOfPml4EntriesNeeded + 1;
TotalPagesNum = ((NumberOfPdpEntriesNeeded + 1) * NumberOfPml4EntriesNeeded + 1) * NumberOfPml5EntriesNeeded + 1;
} else {
TotalPagesNum = NumberOfPml4EntriesNeeded + 1;
TotalPagesNum = (NumberOfPml4EntriesNeeded + 1) * NumberOfPml5EntriesNeeded + 1;
}
//
// Substract the one page occupied by PML5 entries if 5-Level Paging is disabled.
//
if (!Page5LevelSupport) {
TotalPagesNum--;
}
DEBUG ((DEBUG_INFO, "Pml5=%u Pml4=%u Pdp=%u TotalPage=%Lu\n",
NumberOfPml5EntriesNeeded, NumberOfPml4EntriesNeeded,
NumberOfPdpEntriesNeeded, (UINT64)TotalPagesNum));
BigPageAddress = (UINTN) AllocatePageTableMemory (TotalPagesNum);
ASSERT (BigPageAddress != 0);
@ -711,92 +753,125 @@ CreateIdentityMappingPageTables (
// By architecture only one PageMapLevel4 exists - so lets allocate storage for it.
//
PageMap = (VOID *) BigPageAddress;
BigPageAddress += SIZE_4KB;
PageMapLevel4Entry = PageMap;
if (Page5LevelSupport) {
//
// By architecture only one PageMapLevel5 exists - so lets allocate storage for it.
//
PageMapLevel5Entry = PageMap;
BigPageAddress += SIZE_4KB;
}
PageAddress = 0;
for (IndexOfPml4Entries = 0; IndexOfPml4Entries < NumberOfPml4EntriesNeeded; IndexOfPml4Entries++, PageMapLevel4Entry++) {
for ( IndexOfPml5Entries = 0
; IndexOfPml5Entries < NumberOfPml5EntriesNeeded
; IndexOfPml5Entries++, PageMapLevel5Entry++) {
//
// Each PML4 entry points to a page of Page Directory Pointer entires.
// So lets allocate space for them and fill them in in the IndexOfPdpEntries loop.
// 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.
//
PageDirectoryPointerEntry = (VOID *) BigPageAddress;
BigPageAddress += SIZE_4KB;
PageMapLevel4Entry = (VOID *) BigPageAddress;
BigPageAddress += SIZE_4KB;
//
// Make a PML4 Entry
//
PageMapLevel4Entry->Uint64 = (UINT64)(UINTN)PageDirectoryPointerEntry | AddressEncMask;
PageMapLevel4Entry->Bits.ReadWrite = 1;
PageMapLevel4Entry->Bits.Present = 1;
if (Page5LevelSupport) {
//
// Make a PML5 Entry
//
PageMapLevel5Entry->Uint64 = (UINT64) (UINTN) PageMapLevel4Entry | AddressEncMask;
PageMapLevel5Entry->Bits.ReadWrite = 1;
PageMapLevel5Entry->Bits.Present = 1;
}
if (Page1GSupport) {
PageDirectory1GEntry = (VOID *) PageDirectoryPointerEntry;
for ( IndexOfPml4Entries = 0
; IndexOfPml4Entries < (NumberOfPml5EntriesNeeded == 1 ? NumberOfPml4EntriesNeeded : 512)
; IndexOfPml4Entries++, PageMapLevel4Entry++) {
//
// Each PML4 entry points to a page of Page Directory Pointer entires.
// So lets allocate space for them and fill them in in the IndexOfPdpEntries loop.
//
PageDirectoryPointerEntry = (VOID *) BigPageAddress;
BigPageAddress += SIZE_4KB;
for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectory1GEntry++, PageAddress += SIZE_1GB) {
if (ToSplitPageTable (PageAddress, SIZE_1GB, StackBase, StackSize)) {
Split1GPageTo2M (PageAddress, (UINT64 *) PageDirectory1GEntry, StackBase, StackSize);
} else {
//
// Fill in the Page Directory entries
//
PageDirectory1GEntry->Uint64 = (UINT64)PageAddress | AddressEncMask;
PageDirectory1GEntry->Bits.ReadWrite = 1;
PageDirectory1GEntry->Bits.Present = 1;
PageDirectory1GEntry->Bits.MustBe1 = 1;
}
}
} else {
for (IndexOfPdpEntries = 0; IndexOfPdpEntries < NumberOfPdpEntriesNeeded; IndexOfPdpEntries++, PageDirectoryPointerEntry++) {
//
// 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 = (VOID *) BigPageAddress;
BigPageAddress += SIZE_4KB;
//
// Make a PML4 Entry
//
PageMapLevel4Entry->Uint64 = (UINT64)(UINTN)PageDirectoryPointerEntry | AddressEncMask;
PageMapLevel4Entry->Bits.ReadWrite = 1;
PageMapLevel4Entry->Bits.Present = 1;
//
// Fill in a Page Directory Pointer Entries
//
PageDirectoryPointerEntry->Uint64 = (UINT64)(UINTN)PageDirectoryEntry | AddressEncMask;
PageDirectoryPointerEntry->Bits.ReadWrite = 1;
PageDirectoryPointerEntry->Bits.Present = 1;
if (Page1GSupport) {
PageDirectory1GEntry = (VOID *) PageDirectoryPointerEntry;
for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectoryEntry++, PageAddress += SIZE_2MB) {
if (ToSplitPageTable (PageAddress, SIZE_2MB, StackBase, StackSize)) {
//
// Need to split this 2M page that covers NULL or stack range.
//
Split2MPageTo4K (PageAddress, (UINT64 *) PageDirectoryEntry, StackBase, StackSize);
for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectory1GEntry++, PageAddress += SIZE_1GB) {
if (ToSplitPageTable (PageAddress, SIZE_1GB, StackBase, StackSize)) {
Split1GPageTo2M (PageAddress, (UINT64 *) PageDirectory1GEntry, StackBase, StackSize);
} else {
//
// Fill in the Page Directory entries
//
PageDirectoryEntry->Uint64 = (UINT64)PageAddress | AddressEncMask;
PageDirectoryEntry->Bits.ReadWrite = 1;
PageDirectoryEntry->Bits.Present = 1;
PageDirectoryEntry->Bits.MustBe1 = 1;
PageDirectory1GEntry->Uint64 = (UINT64)PageAddress | AddressEncMask;
PageDirectory1GEntry->Bits.ReadWrite = 1;
PageDirectory1GEntry->Bits.Present = 1;
PageDirectory1GEntry->Bits.MustBe1 = 1;
}
}
}
} else {
for ( IndexOfPdpEntries = 0
; IndexOfPdpEntries < (NumberOfPml4EntriesNeeded == 1 ? NumberOfPdpEntriesNeeded : 512)
; IndexOfPdpEntries++, PageDirectoryPointerEntry++) {
//
// 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 = (VOID *) BigPageAddress;
BigPageAddress += SIZE_4KB;
for (; IndexOfPdpEntries < 512; IndexOfPdpEntries++, PageDirectoryPointerEntry++) {
ZeroMem (
PageDirectoryPointerEntry,
sizeof(PAGE_MAP_AND_DIRECTORY_POINTER)
);
//
// Fill in a Page Directory Pointer Entries
//
PageDirectoryPointerEntry->Uint64 = (UINT64)(UINTN)PageDirectoryEntry | AddressEncMask;
PageDirectoryPointerEntry->Bits.ReadWrite = 1;
PageDirectoryPointerEntry->Bits.Present = 1;
for (IndexOfPageDirectoryEntries = 0; IndexOfPageDirectoryEntries < 512; IndexOfPageDirectoryEntries++, PageDirectoryEntry++, PageAddress += SIZE_2MB) {
if (ToSplitPageTable (PageAddress, SIZE_2MB, StackBase, StackSize)) {
//
// Need to split this 2M page that covers NULL or stack range.
//
Split2MPageTo4K (PageAddress, (UINT64 *) PageDirectoryEntry, StackBase, StackSize);
} else {
//
// Fill in the Page Directory entries
//
PageDirectoryEntry->Uint64 = (UINT64)PageAddress | AddressEncMask;
PageDirectoryEntry->Bits.ReadWrite = 1;
PageDirectoryEntry->Bits.Present = 1;
PageDirectoryEntry->Bits.MustBe1 = 1;
}
}
}
//
// Fill with null entry for unused PDPTE
//
ZeroMem (PageDirectoryPointerEntry, (512 - IndexOfPdpEntries) * sizeof(PAGE_MAP_AND_DIRECTORY_POINTER));
}
}
//
// For the PML4 entries we are not using fill in a null entry.
//
ZeroMem (PageMapLevel4Entry, (512 - IndexOfPml4Entries) * sizeof (PAGE_MAP_AND_DIRECTORY_POINTER));
}
//
// For the PML4 entries we are not using fill in a null entry.
//
for (; IndexOfPml4Entries < 512; IndexOfPml4Entries++, PageMapLevel4Entry++) {
ZeroMem (
PageMapLevel4Entry,
sizeof (PAGE_MAP_AND_DIRECTORY_POINTER)
);
if (Page5LevelSupport) {
Cr4.UintN = AsmReadCr4 ();
Cr4.Bits.LA57 = 1;
AsmWriteCr4 (Cr4.UintN);
//
// For the PML5 entries we are not using fill in a null entry.
//
ZeroMem (PageMapLevel5Entry, (512 - IndexOfPml5Entries) * sizeof (PAGE_MAP_AND_DIRECTORY_POINTER));
}
//