diff options
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c')
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c b/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c deleted file mode 100644 index 32ce5958c5..0000000000 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c +++ /dev/null @@ -1,232 +0,0 @@ -/** @file
-Page table manipulation functions for IA-32 processors
-
-Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
-Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
-
-This program and the accompanying materials
-are licensed and made available under the terms and conditions of the BSD License
-which accompanies this distribution. The full text of the license may be found at
-http://opensource.org/licenses/bsd-license.php
-
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
-**/
-
-#include "PiSmmCpuDxeSmm.h"
-
-/**
- Create PageTable for SMM use.
-
- @return PageTable Address
-
-**/
-UINT32
-SmmInitPageTable (
- VOID
- )
-{
- UINTN PageFaultHandlerHookAddress;
- IA32_IDT_GATE_DESCRIPTOR *IdtEntry;
- EFI_STATUS Status;
-
- //
- // Initialize spin lock
- //
- InitializeSpinLock (mPFLock);
-
- if (FeaturePcdGet (PcdCpuSmmProfileEnable)) {
- //
- // Set own Page Fault entry instead of the default one, because SMM Profile
- // feature depends on IRET instruction to do Single Step
- //
- PageFaultHandlerHookAddress = (UINTN)PageFaultIdtHandlerSmmProfile;
- IdtEntry = (IA32_IDT_GATE_DESCRIPTOR *) gcSmiIdtr.Base;
- IdtEntry += EXCEPT_IA32_PAGE_FAULT;
- IdtEntry->Bits.OffsetLow = (UINT16)PageFaultHandlerHookAddress;
- IdtEntry->Bits.Reserved_0 = 0;
- IdtEntry->Bits.GateType = IA32_IDT_GATE_TYPE_INTERRUPT_32;
- IdtEntry->Bits.OffsetHigh = (UINT16)(PageFaultHandlerHookAddress >> 16);
- } else {
- //
- // Register SMM Page Fault Handler
- //
- Status = SmmRegisterExceptionHandler (&mSmmCpuService, EXCEPT_IA32_PAGE_FAULT, SmiPFHandler);
- ASSERT_EFI_ERROR (Status);
- }
-
- //
- // Additional SMM IDT initialization for SMM stack guard
- //
- if (FeaturePcdGet (PcdCpuSmmStackGuard)) {
- InitializeIDTSmmStackGuard ();
- }
- return Gen4GPageTable (TRUE);
-}
-
-/**
- Page Fault handler for SMM use.
-
-**/
-VOID
-SmiDefaultPFHandler (
- VOID
- )
-{
- CpuDeadLoop ();
-}
-
-/**
- ThePage Fault handler wrapper for SMM use.
-
- @param InterruptType Defines the type of interrupt or exception that
- occurred on the processor.This parameter is processor architecture specific.
- @param SystemContext A pointer to the processor context when
- the interrupt occurred on the processor.
-**/
-VOID
-EFIAPI
-SmiPFHandler (
- IN EFI_EXCEPTION_TYPE InterruptType,
- IN EFI_SYSTEM_CONTEXT SystemContext
- )
-{
- UINTN PFAddress;
- UINTN GuardPageAddress;
- UINTN CpuIndex;
-
- ASSERT (InterruptType == EXCEPT_IA32_PAGE_FAULT);
-
- AcquireSpinLock (mPFLock);
-
- PFAddress = AsmReadCr2 ();
-
- //
- // If a page fault occurs in SMRAM range, it might be in a SMM stack guard page,
- // or SMM page protection violation.
- //
- if ((PFAddress >= mCpuHotPlugData.SmrrBase) &&
- (PFAddress < (mCpuHotPlugData.SmrrBase + mCpuHotPlugData.SmrrSize))) {
- DumpCpuContext (InterruptType, SystemContext);
- CpuIndex = GetCpuIndex ();
- GuardPageAddress = (mSmmStackArrayBase + EFI_PAGE_SIZE + CpuIndex * mSmmStackSize);
- if ((FeaturePcdGet (PcdCpuSmmStackGuard)) &&
- (PFAddress >= GuardPageAddress) &&
- (PFAddress < (GuardPageAddress + EFI_PAGE_SIZE))) {
- DEBUG ((DEBUG_ERROR, "SMM stack overflow!\n"));
- } else {
- if ((SystemContext.SystemContextIa32->ExceptionData & IA32_PF_EC_ID) != 0) {
- DEBUG ((DEBUG_ERROR, "SMM exception at execution (0x%x)\n", PFAddress));
- DEBUG_CODE (
- DumpModuleInfoByIp (*(UINTN *)(UINTN)SystemContext.SystemContextIa32->Esp);
- );
- } else {
- DEBUG ((DEBUG_ERROR, "SMM exception at access (0x%x)\n", PFAddress));
- DEBUG_CODE (
- DumpModuleInfoByIp ((UINTN)SystemContext.SystemContextIa32->Eip);
- );
- }
- }
- CpuDeadLoop ();
- }
-
- //
- // If a page fault occurs in SMM range
- //
- if ((PFAddress < mCpuHotPlugData.SmrrBase) ||
- (PFAddress >= mCpuHotPlugData.SmrrBase + mCpuHotPlugData.SmrrSize)) {
- DumpCpuContext (InterruptType, SystemContext);
- if ((SystemContext.SystemContextIa32->ExceptionData & IA32_PF_EC_ID) != 0) {
- DEBUG ((DEBUG_ERROR, "Code executed on IP(0x%x) out of SMM range after SMM is locked!\n", PFAddress));
- DEBUG_CODE (
- DumpModuleInfoByIp (*(UINTN *)(UINTN)SystemContext.SystemContextIa32->Esp);
- );
- CpuDeadLoop ();
- }
- if (IsSmmCommBufferForbiddenAddress (PFAddress)) {
- DEBUG ((DEBUG_ERROR, "Access SMM communication forbidden address (0x%x)!\n", PFAddress));
- DEBUG_CODE (
- DumpModuleInfoByIp ((UINTN)SystemContext.SystemContextIa32->Eip);
- );
- CpuDeadLoop ();
- }
- }
-
- if (FeaturePcdGet (PcdCpuSmmProfileEnable)) {
- SmmProfilePFHandler (
- SystemContext.SystemContextIa32->Eip,
- SystemContext.SystemContextIa32->ExceptionData
- );
- } else {
- DumpCpuContext (InterruptType, SystemContext);
- SmiDefaultPFHandler ();
- }
-
- ReleaseSpinLock (mPFLock);
-}
-
-/**
- This function sets memory attribute for page table.
-**/
-VOID
-SetPageTableAttributes (
- VOID
- )
-{
- UINTN Index2;
- UINTN Index3;
- UINT64 *L1PageTable;
- UINT64 *L2PageTable;
- UINT64 *L3PageTable;
- BOOLEAN IsSplitted;
- BOOLEAN PageTableSplitted;
-
- DEBUG ((DEBUG_INFO, "SetPageTableAttributes\n"));
-
- //
- // Disable write protection, because we need mark page table to be write protected.
- // We need *write* page table memory, to mark itself to be *read only*.
- //
- AsmWriteCr0 (AsmReadCr0() & ~CR0_WP);
-
- do {
- DEBUG ((DEBUG_INFO, "Start...\n"));
- PageTableSplitted = FALSE;
-
- L3PageTable = (UINT64 *)GetPageTableBase ();
-
- SmmSetMemoryAttributesEx ((EFI_PHYSICAL_ADDRESS)(UINTN)L3PageTable, SIZE_4KB, EFI_MEMORY_RO, &IsSplitted);
- PageTableSplitted = (PageTableSplitted || IsSplitted);
-
- for (Index3 = 0; Index3 < 4; Index3++) {
- L2PageTable = (UINT64 *)(UINTN)(L3PageTable[Index3] & ~mAddressEncMask & PAGING_4K_ADDRESS_MASK_64);
- if (L2PageTable == NULL) {
- continue;
- }
-
- 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);
- }
- }
- } while (PageTableSplitted);
-
- //
- // Enable write protection, after page table updated.
- //
- AsmWriteCr0 (AsmReadCr0() | CR0_WP);
-
- return ;
-}
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