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audk/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.h

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/** @file
Agent Module to load other modules to deploy SMM Entry Vector for X86 CPU.
Copyright (c) 2009 - 2023, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
Copyright (C) 2023 Advanced Micro Devices, Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _CPU_PISMMCPUDXESMM_H_
#define _CPU_PISMMCPUDXESMM_H_
#include <PiSmm.h>
#include <Protocol/SmmConfiguration.h>
#include <Protocol/SmmCpu.h>
#include <Protocol/SmmAccess2.h>
#include <Protocol/SmmReadyToLock.h>
#include <Protocol/SmmCpuService.h>
#include <Protocol/SmmMemoryAttribute.h>
#include <Protocol/MmMp.h>
#include <Guid/AcpiS3Context.h>
#include <Guid/MemoryAttributesTable.h>
#include <Guid/PiSmmMemoryAttributesTable.h>
#include <Guid/SmmBaseHob.h>
#include <Guid/MpInformation2.h>
#include <Library/BaseLib.h>
#include <Library/IoLib.h>
#include <Library/TimerLib.h>
#include <Library/SynchronizationLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PcdLib.h>
#include <Library/MtrrLib.h>
#include <Library/SmmCpuPlatformHookLib.h>
#include <Library/SmmServicesTableLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/DebugAgentLib.h>
#include <Library/UefiLib.h>
#include <Library/HobLib.h>
#include <Library/LocalApicLib.h>
#include <Library/CpuLib.h>
#include <Library/CpuExceptionHandlerLib.h>
#include <Library/ReportStatusCodeLib.h>
#include <Library/SmmCpuFeaturesLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/RegisterCpuFeaturesLib.h>
#include <Library/PerformanceLib.h>
#include <Library/CpuPageTableLib.h>
#include <Library/MmSaveStateLib.h>
#include <Library/SmmCpuSyncLib.h>
#include <AcpiCpuData.h>
#include <CpuHotPlugData.h>
#include <Register/Intel/Cpuid.h>
#include <Register/Intel/Msr.h>
#include "CpuService.h"
#include "SmmProfile.h"
#include "SmmMpPerf.h"
//
// CET definition
//
#define CPUID_CET_SS BIT7
#define CPUID_CET_IBT BIT20
#define CR4_CET_ENABLE BIT23
#define MSR_IA32_S_CET 0x6A2
#define MSR_IA32_PL0_SSP 0x6A4
#define MSR_IA32_INTERRUPT_SSP_TABLE_ADDR 0x6A8
typedef union {
struct {
// enable shadow stacks
UINT32 SH_STK_ENP : 1;
// enable the WRSS{D,Q}W instructions.
UINT32 WR_SHSTK_EN : 1;
// enable tracking of indirect call/jmp targets to be ENDBRANCH instruction.
UINT32 ENDBR_EN : 1;
// enable legacy compatibility treatment for indirect call/jmp tracking.
UINT32 LEG_IW_EN : 1;
// enable use of no-track prefix on indirect call/jmp.
UINT32 NO_TRACK_EN : 1;
// disable suppression of CET indirect branch tracking on legacy compatibility.
UINT32 SUPPRESS_DIS : 1;
UINT32 RSVD : 4;
// indirect branch tracking is suppressed.
// This bit can be written to 1 only if TRACKER is written as IDLE.
UINT32 SUPPRESS : 1;
// Value of the endbranch state machine
// Values: IDLE (0), WAIT_FOR_ENDBRANCH(1).
UINT32 TRACKER : 1;
// linear address of a bitmap in memory indicating valid
// pages as target of CALL/JMP_indirect that do not land on ENDBRANCH when CET is enabled
// and not suppressed. Valid when ENDBR_EN is 1. Must be machine canonical when written on
// parts that support 64 bit mode. On parts that do not support 64 bit mode, the bits 63:32 are
// reserved and must be 0. This value is extended by 12 bits at the low end to form the base address
// (this automatically aligns the address on a 4-Kbyte boundary).
UINT32 EB_LEG_BITMAP_BASE_low : 12;
UINT32 EB_LEG_BITMAP_BASE_high : 32;
} Bits;
UINT64 Uint64;
} MSR_IA32_CET;
//
// MSRs required for configuration of SMM Code Access Check
//
#define EFI_MSR_SMM_MCA_CAP 0x17D
#define SMM_CODE_ACCESS_CHK_BIT BIT58
#define SMM_FEATURE_CONTROL_LOCK_BIT BIT0
#define SMM_CODE_CHK_EN_BIT BIT2
///
/// Page Table Entry
///
#define IA32_PG_P BIT0
#define IA32_PG_RW BIT1
#define IA32_PG_U BIT2
#define IA32_PG_WT BIT3
#define IA32_PG_CD BIT4
#define IA32_PG_A BIT5
#define IA32_PG_D BIT6
#define IA32_PG_PS BIT7
#define IA32_PG_PAT_2M BIT12
#define IA32_PG_PAT_4K IA32_PG_PS
#define IA32_PG_PMNT BIT62
#define IA32_PG_NX BIT63
#define PAGE_ATTRIBUTE_BITS (IA32_PG_D | IA32_PG_A | IA32_PG_U | IA32_PG_RW | IA32_PG_P)
//
// Bits 1, 2, 5, 6 are reserved in the IA32 PAE PDPTE
// X64 PAE PDPTE does not have such restriction
//
#define IA32_PAE_PDPTE_ATTRIBUTE_BITS (IA32_PG_P)
#define PAGE_PROGATE_BITS (IA32_PG_NX | PAGE_ATTRIBUTE_BITS)
#define PAGING_4K_MASK 0xFFF
#define PAGING_2M_MASK 0x1FFFFF
#define PAGING_1G_MASK 0x3FFFFFFF
#define PAGING_PAE_INDEX_MASK 0x1FF
#define PAGING_4K_ADDRESS_MASK_64 0x000FFFFFFFFFF000ull
#define PAGING_2M_ADDRESS_MASK_64 0x000FFFFFFFE00000ull
#define PAGING_1G_ADDRESS_MASK_64 0x000FFFFFC0000000ull
#define SMRR_MAX_ADDRESS BASE_4GB
typedef enum {
PageNone,
Page4K,
Page2M,
Page1G,
} PAGE_ATTRIBUTE;
typedef struct {
PAGE_ATTRIBUTE Attribute;
UINT64 Length;
UINT64 AddressMask;
} PAGE_ATTRIBUTE_TABLE;
//
// Size of Task-State Segment defined in IA32 Manual
//
#define TSS_SIZE 104
#define EXCEPTION_TSS_SIZE (TSS_SIZE + 4) // Add 4 bytes SSP
#define TSS_X64_IST1_OFFSET 36
#define TSS_IA32_CR3_OFFSET 28
#define TSS_IA32_ESP_OFFSET 56
#define TSS_IA32_SSP_OFFSET 104
#define CR0_WP BIT16
//
// Code select value
//
#define PROTECT_MODE_CODE_SEGMENT 0x08
#define LONG_MODE_CODE_SEGMENT 0x38
//
// The size 0x20 must be bigger than
// the size of template code of SmmInit. Currently,
// the size of SmmInit requires the 0x16 Bytes buffer
// at least.
//
#define BACK_BUF_SIZE 0x20
#define EXCEPTION_VECTOR_NUMBER 0x20
#define INVALID_APIC_ID 0xFFFFFFFFFFFFFFFFULL
//
// Wrapper used to convert EFI_AP_PROCEDURE2 and EFI_AP_PROCEDURE.
//
typedef struct {
EFI_AP_PROCEDURE Procedure;
VOID *ProcedureArgument;
} PROCEDURE_WRAPPER;
#define PROCEDURE_TOKEN_SIGNATURE SIGNATURE_32 ('P', 'R', 'T', 'S')
typedef struct {
UINTN Signature;
LIST_ENTRY Link;
SPIN_LOCK *SpinLock;
volatile UINT32 RunningApCount;
} PROCEDURE_TOKEN;
#define PROCEDURE_TOKEN_FROM_LINK(a) CR (a, PROCEDURE_TOKEN, Link, PROCEDURE_TOKEN_SIGNATURE)
#define TOKEN_BUFFER_SIGNATURE SIGNATURE_32 ('T', 'K', 'B', 'S')
typedef struct {
UINTN Signature;
LIST_ENTRY Link;
UINT8 *Buffer;
} TOKEN_BUFFER;
#define TOKEN_BUFFER_FROM_LINK(a) CR (a, TOKEN_BUFFER, Link, TOKEN_BUFFER_SIGNATURE)
//
// Private structure for the SMM CPU module that is stored in DXE Runtime memory
// Contains the SMM Configuration Protocols that is produced.
// Contains a mix of DXE and SMM contents. All the fields must be used properly.
//
#define SMM_CPU_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('s', 'c', 'p', 'u')
typedef struct {
UINTN Signature;
EFI_HANDLE SmmCpuHandle;
EFI_PROCESSOR_INFORMATION *ProcessorInfo;
SMM_CPU_OPERATION *Operation;
UINTN *CpuSaveStateSize;
VOID **CpuSaveState;
EFI_SMM_RESERVED_SMRAM_REGION SmmReservedSmramRegion[1];
EFI_SMM_ENTRY_CONTEXT SmmCoreEntryContext;
EFI_SMM_ENTRY_POINT SmmCoreEntry;
EFI_SMM_CONFIGURATION_PROTOCOL SmmConfiguration;
PROCEDURE_WRAPPER *ApWrapperFunc;
LIST_ENTRY TokenList;
LIST_ENTRY *FirstFreeToken;
} SMM_CPU_PRIVATE_DATA;
extern SMM_CPU_PRIVATE_DATA *gSmmCpuPrivate;
extern CPU_HOT_PLUG_DATA mCpuHotPlugData;
extern UINTN mMaxNumberOfCpus;
extern UINTN mNumberOfCpus;
extern EFI_SMM_CPU_PROTOCOL mSmmCpu;
extern EFI_MM_MP_PROTOCOL mSmmMp;
extern BOOLEAN m5LevelPagingNeeded;
extern PAGING_MODE mPagingMode;
extern UINTN mSmmShadowStackSize;
///
/// The mode of the CPU at the time an SMI occurs
///
extern UINT8 mSmmSaveStateRegisterLma;
#define PAGE_TABLE_POOL_ALIGNMENT BASE_128KB
#define PAGE_TABLE_POOL_UNIT_SIZE BASE_128KB
#define PAGE_TABLE_POOL_UNIT_PAGES EFI_SIZE_TO_PAGES (PAGE_TABLE_POOL_UNIT_SIZE)
#define PAGE_TABLE_POOL_ALIGN_MASK \
(~(EFI_PHYSICAL_ADDRESS)(PAGE_TABLE_POOL_ALIGNMENT - 1))
typedef struct {
VOID *NextPool;
UINTN Offset;
UINTN FreePages;
} PAGE_TABLE_POOL;
/**
Disable CET.
**/
VOID
EFIAPI
DisableCet (
VOID
);
/**
Enable CET.
**/
VOID
EFIAPI
EnableCet (
VOID
);
//
// SMM CPU Protocol function prototypes.
//
/**
Read information from the CPU save state.
@param This EFI_SMM_CPU_PROTOCOL instance
@param Width The number of bytes to read from the CPU save state.
@param Register Specifies the CPU register to read form the save state.
@param CpuIndex Specifies the zero-based index of the CPU save state
@param Buffer Upon return, this holds the CPU register value read from the save state.
@retval EFI_SUCCESS The register was read from Save State
@retval EFI_NOT_FOUND The register is not defined for the Save State of Processor
@retval EFI_INVALID_PARAMETER This or Buffer is NULL.
**/
EFI_STATUS
EFIAPI
SmmReadSaveState (
IN CONST EFI_SMM_CPU_PROTOCOL *This,
IN UINTN Width,
IN EFI_SMM_SAVE_STATE_REGISTER Register,
IN UINTN CpuIndex,
OUT VOID *Buffer
);
/**
Write data to the CPU save state.
@param This EFI_SMM_CPU_PROTOCOL instance
@param Width The number of bytes to read from the CPU save state.
@param Register Specifies the CPU register to write to the save state.
@param CpuIndex Specifies the zero-based index of the CPU save state
@param Buffer Upon entry, this holds the new CPU register value.
@retval EFI_SUCCESS The register was written from Save State
@retval EFI_NOT_FOUND The register is not defined for the Save State of Processor
@retval EFI_INVALID_PARAMETER ProcessorIndex or Width is not correct
**/
EFI_STATUS
EFIAPI
SmmWriteSaveState (
IN CONST EFI_SMM_CPU_PROTOCOL *This,
IN UINTN Width,
IN EFI_SMM_SAVE_STATE_REGISTER Register,
IN UINTN CpuIndex,
IN CONST VOID *Buffer
);
/**
C function for SMI handler. To change all processor's SMMBase Register.
**/
VOID
EFIAPI
SmmInitHandler (
VOID
);
/**
Issue SMI IPI (All Excluding Self SMM IPI + BSP SMM IPI) to execute first SMI init.
**/
VOID
ExecuteFirstSmiInit (
VOID
);
extern BOOLEAN mSmmRelocated;
extern volatile BOOLEAN *mSmmInitialized;
extern UINT32 mBspApicId;
extern CONST UINT8 gcSmmInitTemplate[];
extern CONST UINT16 gcSmmInitSize;
X86_ASSEMBLY_PATCH_LABEL gPatchSmmCr0;
extern UINT32 mSmmCr0;
X86_ASSEMBLY_PATCH_LABEL gPatchSmmCr3;
extern UINT32 mSmmCr4;
X86_ASSEMBLY_PATCH_LABEL gPatchSmmCr4;
X86_ASSEMBLY_PATCH_LABEL gPatchSmmInitStack;
X86_ASSEMBLY_PATCH_LABEL mPatchCetSupported;
extern BOOLEAN mCetSupported;
/**
Semaphore operation for all processor relocate SMMBase.
**/
VOID
EFIAPI
SmmRelocationSemaphoreComplete (
VOID
);
///
/// The type of SMM CPU Information
///
typedef struct {
SPIN_LOCK *Busy;
volatile EFI_AP_PROCEDURE2 Procedure;
volatile VOID *Parameter;
volatile BOOLEAN *Present;
PROCEDURE_TOKEN *Token;
EFI_STATUS *Status;
} SMM_CPU_DATA_BLOCK;
typedef enum {
SmmCpuSyncModeTradition,
SmmCpuSyncModeRelaxedAp,
SmmCpuSyncModeMax
} SMM_CPU_SYNC_MODE;
typedef struct {
//
// Pointer to an array. The array should be located immediately after this structure
// so that UC cache-ability can be set together.
//
SMM_CPU_DATA_BLOCK *CpuData;
volatile UINT32 BspIndex;
volatile BOOLEAN *InsideSmm;
volatile BOOLEAN *AllCpusInSync;
volatile SMM_CPU_SYNC_MODE EffectiveSyncMode;
volatile BOOLEAN SwitchBsp;
volatile BOOLEAN *CandidateBsp;
volatile BOOLEAN AllApArrivedWithException;
EFI_AP_PROCEDURE StartupProcedure;
VOID *StartupProcArgs;
SMM_CPU_SYNC_CONTEXT *SyncContext;
} SMM_DISPATCHER_MP_SYNC_DATA;
#define SMM_PSD_OFFSET 0xfb00
///
/// All global semaphores' pointer
///
typedef struct {
volatile BOOLEAN *InsideSmm;
volatile BOOLEAN *AllCpusInSync;
SPIN_LOCK *PFLock;
SPIN_LOCK *CodeAccessCheckLock;
} SMM_CPU_SEMAPHORE_GLOBAL;
///
/// All semaphores for each processor
///
typedef struct {
SPIN_LOCK *Busy;
volatile BOOLEAN *Present;
SPIN_LOCK *Token;
} SMM_CPU_SEMAPHORE_CPU;
///
/// All semaphores' information
///
typedef struct {
SMM_CPU_SEMAPHORE_GLOBAL SemaphoreGlobal;
SMM_CPU_SEMAPHORE_CPU SemaphoreCpu;
} SMM_CPU_SEMAPHORES;
extern IA32_DESCRIPTOR gcSmiGdtr;
extern EFI_PHYSICAL_ADDRESS mGdtBuffer;
extern UINTN mGdtBufferSize;
extern IA32_DESCRIPTOR gcSmiIdtr;
extern VOID *gcSmiIdtrPtr;
extern UINT64 gPhyMask;
extern SMM_DISPATCHER_MP_SYNC_DATA *mSmmMpSyncData;
extern UINTN mSmmStackArrayBase;
extern UINTN mSmmStackArrayEnd;
extern UINTN mSmmStackSize;
extern EFI_SMM_CPU_SERVICE_PROTOCOL mSmmCpuService;
extern IA32_DESCRIPTOR gcSmiInitGdtr;
extern SMM_CPU_SEMAPHORES mSmmCpuSemaphores;
extern UINTN mSemaphoreSize;
extern SPIN_LOCK *mPFLock;
extern SPIN_LOCK *mConfigSmmCodeAccessCheckLock;
extern EFI_SMRAM_DESCRIPTOR *mSmmCpuSmramRanges;
extern UINTN mSmmCpuSmramRangeCount;
extern UINT8 mPhysicalAddressBits;
extern BOOLEAN mSmmDebugAgentSupport;
//
// Copy of the PcdPteMemoryEncryptionAddressOrMask
//
extern UINT64 mAddressEncMask;
/**
Create 4G PageTable in SMRAM.
@param[in] Is32BitPageTable Whether the page table is 32-bit PAE
@return PageTable Address
**/
UINT32
Gen4GPageTable (
IN BOOLEAN Is32BitPageTable
);
/**
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
);
/**
Initialize global data for MP synchronization.
@param Stacks Base address of SMI stack buffer for all processors.
@param StackSize Stack size for each processor in SMM.
@param ShadowStackSize Shadow Stack size for each processor in SMM.
**/
UINT32
InitializeMpServiceData (
IN VOID *Stacks,
IN UINTN StackSize,
IN UINTN ShadowStackSize
);
/**
Initialize Timer for SMM AP Sync.
**/
VOID
InitializeSmmTimer (
VOID
);
/**
Start Timer for SMM AP Sync.
**/
UINT64
EFIAPI
StartSyncTimer (
VOID
);
/**
Check if the SMM AP Sync timer is timeout.
@param Timer The start timer from the begin.
**/
BOOLEAN
EFIAPI
IsSyncTimerTimeout (
IN UINT64 Timer
);
/**
Initialize IDT for SMM Stack Guard.
**/
VOID
EFIAPI
InitializeIDTSmmStackGuard (
VOID
);
/**
Initialize IDT IST Field.
@param[in] ExceptionType Exception type.
@param[in] Ist IST value.
**/
VOID
EFIAPI
InitializeIdtIst (
IN EFI_EXCEPTION_TYPE ExceptionType,
IN UINT8 Ist
);
/**
Initialize Gdt for all processors.
@param[in] Cr3 CR3 value.
@param[out] GdtStepSize The step size for GDT table.
@return GdtBase for processor 0.
GdtBase for processor X is: GdtBase + (GdtStepSize * X)
**/
VOID *
InitGdt (
IN UINTN Cr3,
OUT UINTN *GdtStepSize
);
/**
Register the SMM Foundation entry point.
@param This Pointer to EFI_SMM_CONFIGURATION_PROTOCOL instance
@param SmmEntryPoint SMM Foundation EntryPoint
@retval EFI_SUCCESS Successfully to register SMM foundation entry point
**/
EFI_STATUS
EFIAPI
RegisterSmmEntry (
IN CONST EFI_SMM_CONFIGURATION_PROTOCOL *This,
IN EFI_SMM_ENTRY_POINT SmmEntryPoint
);
/**
Create PageTable for SMM use.
@return PageTable Address
**/
UINT32
SmmInitPageTable (
VOID
);
/**
Schedule a procedure to run on the specified CPU.
@param Procedure The address of the procedure to run
@param CpuIndex Target CPU number
@param ProcArguments The parameter to pass to the procedure
@retval EFI_INVALID_PARAMETER CpuNumber not valid
@retval EFI_INVALID_PARAMETER CpuNumber specifying BSP
@retval EFI_INVALID_PARAMETER The AP specified by CpuNumber did not enter SMM
@retval EFI_INVALID_PARAMETER The AP specified by CpuNumber is busy
@retval EFI_SUCCESS - The procedure has been successfully scheduled
**/
EFI_STATUS
EFIAPI
SmmStartupThisAp (
IN EFI_AP_PROCEDURE Procedure,
IN UINTN CpuIndex,
IN OUT VOID *ProcArguments OPTIONAL
);
/**
Schedule a procedure to run on the specified CPU in a blocking fashion.
@param Procedure The address of the procedure to run
@param CpuIndex Target CPU Index
@param ProcArguments The parameter to pass to the procedure
@retval EFI_INVALID_PARAMETER CpuNumber not valid
@retval EFI_INVALID_PARAMETER CpuNumber specifying BSP
@retval EFI_INVALID_PARAMETER The AP specified by CpuNumber did not enter SMM
@retval EFI_INVALID_PARAMETER The AP specified by CpuNumber is busy
@retval EFI_SUCCESS The procedure has been successfully scheduled
**/
EFI_STATUS
EFIAPI
SmmBlockingStartupThisAp (
IN EFI_AP_PROCEDURE Procedure,
IN UINTN CpuIndex,
IN OUT VOID *ProcArguments OPTIONAL
);
/**
This function modifies the page attributes for the memory region specified by BaseAddress and
Length from their current attributes to the attributes specified by Attributes.
Caller should make sure BaseAddress and Length is at page boundary.
@param[in] PageTableBase The page table base.
@param[in] BaseAddress The physical address that is the start address of a memory region.
@param[in] Length The size in bytes of the memory region.
@param[in] Attributes The bit mask of attributes to modify for the memory region.
@param[in] IsSet TRUE means to set attributes. FALSE means to clear attributes.
@param[out] IsModified TRUE means page table modified. FALSE means page table not modified.
@retval RETURN_SUCCESS The attributes were modified for the memory region.
@retval RETURN_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval RETURN_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of attributes that
cannot be set together.
@retval RETURN_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval RETURN_UNSUPPORTED The processor does not support one or more bytes of the memory
resource range specified by BaseAddress and Length.
The bit mask of attributes is not support for the memory resource
range specified by BaseAddress and Length.
**/
RETURN_STATUS
ConvertMemoryPageAttributes (
IN UINTN PageTableBase,
IN PAGING_MODE PagingMode,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes,
IN BOOLEAN IsSet,
OUT BOOLEAN *IsModified OPTIONAL
);
/**
This function sets the attributes for the memory region specified by BaseAddress and
Length from their current attributes to the attributes specified by Attributes.
@param[in] BaseAddress The physical address that is the start address of a memory region.
@param[in] Length The size in bytes of the memory region.
@param[in] Attributes The bit mask of attributes to set for the memory region.
@retval EFI_SUCCESS The attributes were set for the memory region.
@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of attributes that
cannot be set together.
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
resource range specified by BaseAddress and Length.
The bit mask of attributes is not support for the memory resource
range specified by BaseAddress and Length.
**/
EFI_STATUS
SmmSetMemoryAttributes (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
This function clears the attributes for the memory region specified by BaseAddress and
Length from their current attributes to the attributes specified by Attributes.
@param[in] BaseAddress The physical address that is the start address of a memory region.
@param[in] Length The size in bytes of the memory region.
@param[in] Attributes The bit mask of attributes to clear for the memory region.
@retval EFI_SUCCESS The attributes were cleared for the memory region.
@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of attributes that
cannot be set together.
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
resource range specified by BaseAddress and Length.
The bit mask of attributes is not support for the memory resource
range specified by BaseAddress and Length.
**/
EFI_STATUS
SmmClearMemoryAttributes (
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
Initialize MP synchronization data.
**/
VOID
EFIAPI
InitializeMpSyncData (
VOID
);
/**
Find out SMRAM information including SMRR base and SMRR size.
@param SmrrBase SMRR base
@param SmrrSize SMRR size
**/
VOID
FindSmramInfo (
OUT UINT32 *SmrrBase,
OUT UINT32 *SmrrSize
);
/**
Relocate SmmBases for each processor.
Execute on first boot and all S3 resumes
**/
VOID
EFIAPI
SmmRelocateBases (
VOID
);
/**
Page Fault handler 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
);
/**
Perform the remaining tasks.
**/
VOID
PerformRemainingTasks (
VOID
);
/**
Perform the pre tasks.
**/
VOID
PerformPreTasks (
VOID
);
/**
Initialize MSR spin lock by MSR index.
@param MsrIndex MSR index value.
**/
VOID
InitMsrSpinLockByIndex (
IN UINT32 MsrIndex
);
/**
Hook return address of SMM Save State so that semaphore code
can be executed immediately after AP exits SMM to indicate to
the BSP that an AP has exited SMM after SMBASE relocation.
@param[in] CpuIndex The processor index.
@param[in] RebasedFlag A pointer to a flag that is set to TRUE
immediately after AP exits SMM.
**/
VOID
SemaphoreHook (
IN UINTN CpuIndex,
IN volatile BOOLEAN *RebasedFlag
);
/**
Configure SMM Code Access Check feature for all processors.
SMM Feature Control MSR will be locked after configuration.
**/
VOID
ConfigSmmCodeAccessCheck (
VOID
);
/**
Hook the code executed immediately after an RSM instruction on the currently
executing CPU. The mode of code executed immediately after RSM must be
detected, and the appropriate hook must be selected. Always clear the auto
HALT restart flag if it is set.
@param[in] CpuIndex The processor index for the currently
executing CPU.
@param[in] CpuState Pointer to SMRAM Save State Map for the
currently executing CPU.
@param[in] NewInstructionPointer32 Instruction pointer to use if resuming to
32-bit mode from 64-bit SMM.
@param[in] NewInstructionPointer Instruction pointer to use if resuming to
same mode as SMM.
@retval The value of the original instruction pointer before it was hooked.
**/
UINT64
EFIAPI
HookReturnFromSmm (
IN UINTN CpuIndex,
SMRAM_SAVE_STATE_MAP *CpuState,
UINT64 NewInstructionPointer32,
UINT64 NewInstructionPointer
);
/**
Get the size of the SMI Handler in bytes.
@retval The size, in bytes, of the SMI Handler.
**/
UINTN
EFIAPI
GetSmiHandlerSize (
VOID
);
/**
Install the SMI handler for the CPU specified by CpuIndex. This function
is called by the CPU that was elected as monarch during System Management
Mode initialization.
@param[in] CpuIndex The index of the CPU to install the custom SMI handler.
The value must be between 0 and the NumberOfCpus field
in the System Management System Table (SMST).
@param[in] SmBase The SMBASE address for the CPU specified by CpuIndex.
@param[in] SmiStack The stack to use when an SMI is processed by the
the CPU specified by CpuIndex.
@param[in] StackSize The size, in bytes, if the stack used when an SMI is
processed by the CPU specified by CpuIndex.
@param[in] GdtBase The base address of the GDT to use when an SMI is
processed by the CPU specified by CpuIndex.
@param[in] GdtSize The size, in bytes, of the GDT used when an SMI is
processed by the CPU specified by CpuIndex.
@param[in] IdtBase The base address of the IDT to use when an SMI is
processed by the CPU specified by CpuIndex.
@param[in] IdtSize The size, in bytes, of the IDT used when an SMI is
processed by the CPU specified by CpuIndex.
@param[in] Cr3 The base address of the page tables to use when an SMI
is processed by the CPU specified by CpuIndex.
**/
VOID
EFIAPI
InstallSmiHandler (
IN UINTN CpuIndex,
IN UINT32 SmBase,
IN VOID *SmiStack,
IN UINTN StackSize,
IN UINTN GdtBase,
IN UINTN GdtSize,
IN UINTN IdtBase,
IN UINTN IdtSize,
IN UINT32 Cr3
);
/**
Search module name by input IP address and output it.
@param CallerIpAddress Caller instruction pointer.
**/
VOID
DumpModuleInfoByIp (
IN UINTN CallerIpAddress
);
/**
This function sets memory attribute according to MemoryAttributesTable.
**/
VOID
SetMemMapAttributes (
VOID
);
/**
This function sets UEFI memory attribute according to UEFI memory map.
**/
VOID
SetUefiMemMapAttributes (
VOID
);
/**
Return if the Address is forbidden as SMM communication buffer.
@param[in] Address the address to be checked
@return TRUE The address is forbidden as SMM communication buffer.
@return FALSE The address is allowed as SMM communication buffer.
**/
BOOLEAN
IsSmmCommBufferForbiddenAddress (
IN UINT64 Address
);
/**
This function caches the UEFI memory map information.
**/
VOID
GetUefiMemoryMap (
VOID
);
/**
This function sets memory attribute for page table.
**/
VOID
SetPageTableAttributes (
VOID
);
/**
This function sets the attributes for the memory region specified by BaseAddress and
Length from their current attributes to the attributes specified by Attributes.
@param[in] PageTableBase The page table base.
@param[in] PagingMode The paging mode.
@param[in] BaseAddress The physical address that is the start address of a memory region.
@param[in] Length The size in bytes of the memory region.
@param[in] Attributes The bit mask of attributes to set for the memory region.
@retval EFI_SUCCESS The attributes were set for the memory region.
@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of attributes that
cannot be set together.
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
resource range specified by BaseAddress and Length.
The bit mask of attributes is not support for the memory resource
range specified by BaseAddress and Length.
**/
EFI_STATUS
SmmSetMemoryAttributesEx (
IN UINTN PageTableBase,
IN PAGING_MODE PagingMode,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
This function clears the attributes for the memory region specified by BaseAddress and
Length from their current attributes to the attributes specified by Attributes.
@param[in] PageTableBase The page table base.
@param[in] PagingMode The paging mode.
@param[in] BaseAddress The physical address that is the start address of a memory region.
@param[in] Length The size in bytes of the memory region.
@param[in] Attributes The bit mask of attributes to clear for the memory region.
@retval EFI_SUCCESS The attributes were cleared for the memory region.
@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by
BaseAddress and Length cannot be modified.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of attributes that
cannot be cleared together.
@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory
resource range specified by BaseAddress and Length.
The bit mask of attributes is not supported for the memory resource
range specified by BaseAddress and Length.
**/
EFI_STATUS
SmmClearMemoryAttributesEx (
IN UINTN PageTableBase,
IN PAGING_MODE PagingMode,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
This API provides a way to allocate memory for page table.
This API can be called more once to allocate memory for page tables.
Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the
allocated buffer. The buffer returned is aligned on a 4KB boundary. If Pages is 0, then NULL
is returned. If there is not enough memory remaining to satisfy the request, then NULL is
returned.
@param Pages The number of 4 KB pages to allocate.
@return A pointer to the allocated buffer or NULL if allocation fails.
**/
VOID *
AllocatePageTableMemory (
IN UINTN Pages
);
/**
Allocate pages for code.
@param[in] Pages Number of pages to be allocated.
@return Allocated memory.
**/
VOID *
AllocateCodePages (
IN UINTN Pages
);
/**
Allocate aligned pages for code.
@param[in] Pages Number of pages to be allocated.
@param[in] Alignment The requested alignment of the allocation.
Must be a power of two.
If Alignment is zero, then byte alignment is used.
@return Allocated memory.
**/
VOID *
AllocateAlignedCodePages (
IN UINTN Pages,
IN UINTN Alignment
);
//
// S3 related global variable and function prototype.
//
extern BOOLEAN mSmmS3Flag;
/**
Initialize SMM S3 resume state structure used during S3 Resume.
@param[in] Cr3 The base address of the page tables to use in SMM.
**/
VOID
InitSmmS3ResumeState (
IN UINT32 Cr3
);
/**
Get ACPI CPU data.
**/
VOID
GetAcpiCpuData (
VOID
);
/**
Restore SMM Configuration in S3 boot path.
**/
VOID
RestoreSmmConfigurationInS3 (
VOID
);
/**
Get ACPI S3 enable flag.
**/
VOID
GetAcpiS3EnableFlag (
VOID
);
/**
Transfer AP to safe hlt-loop after it finished restore CPU features on S3 patch.
@param[in] ApHltLoopCode The address of the safe hlt-loop function.
@param[in] TopOfStack A pointer to the new stack to use for the ApHltLoopCode.
@param[in] NumberToFinishAddress Address of Semaphore of APs finish count.
**/
VOID
TransferApToSafeState (
IN UINTN ApHltLoopCode,
IN UINTN TopOfStack,
IN UINTN NumberToFinishAddress
);
/**
Set ShadowStack memory.
@param[in] Cr3 The page table base address.
@param[in] BaseAddress The physical address that is the start address of a memory region.
@param[in] Length The size in bytes of the memory region.
@retval EFI_SUCCESS The shadow stack memory is set.
**/
EFI_STATUS
SetShadowStack (
IN UINTN Cr3,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length
);
/**
Initialize the shadow stack related data structure.
@param CpuIndex The index of CPU.
@param ShadowStack The bottom of the shadow stack for this CPU.
**/
VOID
InitShadowStack (
IN UINTN CpuIndex,
IN VOID *ShadowStack
);
/**
This function set given attributes of the memory region specified by
BaseAddress and Length.
@param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of
a memory region.
@param Length The size in bytes of the memory region.
@param Attributes The bit mask of attributes to set for the memory
region.
@retval EFI_SUCCESS The attributes were set for the memory region.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of
attributes that cannot be set together.
@retval EFI_UNSUPPORTED The processor does not support one or more
bytes of the memory resource range specified
by BaseAddress and Length.
The bit mask of attributes is not supported for
the memory resource range specified by
BaseAddress and Length.
**/
EFI_STATUS
EFIAPI
EdkiiSmmSetMemoryAttributes (
IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
This function clears given attributes of the memory region specified by
BaseAddress and Length.
@param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of
a memory region.
@param Length The size in bytes of the memory region.
@param Attributes The bit mask of attributes to clear for the memory
region.
@retval EFI_SUCCESS The attributes were cleared for the memory region.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of
attributes that cannot be cleared together.
@retval EFI_UNSUPPORTED The processor does not support one or more
bytes of the memory resource range specified
by BaseAddress and Length.
The bit mask of attributes is not supported for
the memory resource range specified by
BaseAddress and Length.
**/
EFI_STATUS
EFIAPI
EdkiiSmmClearMemoryAttributes (
IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
This function retrieves the attributes of the memory region specified by
BaseAddress and Length. If different attributes are got from different part
of the memory region, EFI_NO_MAPPING will be returned.
@param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of
a memory region.
@param Length The size in bytes of the memory region.
@param Attributes Pointer to attributes returned.
@retval EFI_SUCCESS The attributes got for the memory region.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes is NULL.
@retval EFI_NO_MAPPING Attributes are not consistent cross the memory
region.
@retval EFI_UNSUPPORTED The processor does not support one or more
bytes of the memory resource range specified
by BaseAddress and Length.
**/
EFI_STATUS
EFIAPI
EdkiiSmmGetMemoryAttributes (
IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 *Attributes
);
/**
This function fixes up the address of the global variable or function
referred in SmmInit assembly files to be the absolute address.
**/
VOID
EFIAPI
PiSmmCpuSmmInitFixupAddress (
);
/**
This function fixes up the address of the global variable or function
referred in SmiEntry assembly files to be the absolute address.
**/
VOID
EFIAPI
PiSmmCpuSmiEntryFixupAddress (
);
/**
This function reads CR2 register when on-demand paging is enabled
for 64 bit and no action for 32 bit.
@param[out] *Cr2 Pointer to variable to hold CR2 register value.
**/
VOID
SaveCr2 (
OUT UINTN *Cr2
);
/**
This function writes into CR2 register when on-demand paging is enabled
for 64 bit and no action for 32 bit.
@param[in] Cr2 Value to write into CR2 register.
**/
VOID
RestoreCr2 (
IN UINTN Cr2
);
/**
Schedule a procedure to run on the specified CPU.
@param[in] Procedure The address of the procedure to run
@param[in] CpuIndex Target CPU Index
@param[in,out] ProcArguments The parameter to pass to the procedure
@param[in,out] Token This is an optional parameter that allows the caller to execute the
procedure in a blocking or non-blocking fashion. If it is NULL the
call is blocking, and the call will not return until the AP has
completed the procedure. If the token is not NULL, the call will
return immediately. The caller can check whether the procedure has
completed with CheckOnProcedure or WaitForProcedure.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for the APs to finish
execution of Procedure, either for blocking or non-blocking mode.
Zero means infinity. If the timeout expires before all APs return
from Procedure, then Procedure on the failed APs is terminated. If
the timeout expires in blocking mode, the call returns EFI_TIMEOUT.
If the timeout expires in non-blocking mode, the timeout determined
can be through CheckOnProcedure or WaitForProcedure.
Note that timeout support is optional. Whether an implementation
supports this feature can be determined via the Attributes data
member.
@param[in,out] CpuStatus This optional pointer may be used to get the status code returned
by Procedure when it completes execution on the target AP, or with
EFI_TIMEOUT if the Procedure fails to complete within the optional
timeout. The implementation will update this variable with
EFI_NOT_READY prior to starting Procedure on the target AP.
@retval EFI_INVALID_PARAMETER CpuNumber not valid
@retval EFI_INVALID_PARAMETER CpuNumber specifying BSP
@retval EFI_INVALID_PARAMETER The AP specified by CpuNumber did not enter SMM
@retval EFI_INVALID_PARAMETER The AP specified by CpuNumber is busy
@retval EFI_SUCCESS The procedure has been successfully scheduled
**/
EFI_STATUS
InternalSmmStartupThisAp (
IN EFI_AP_PROCEDURE2 Procedure,
IN UINTN CpuIndex,
IN OUT VOID *ProcArguments OPTIONAL,
IN OUT MM_COMPLETION *Token,
IN UINTN TimeoutInMicroseconds,
IN OUT EFI_STATUS *CpuStatus
);
/**
Checks whether the input token is the current used token.
@param[in] Token This parameter describes the token that was passed into DispatchProcedure or
BroadcastProcedure.
@retval TRUE The input token is the current used token.
@retval FALSE The input token is not the current used token.
**/
BOOLEAN
IsTokenInUse (
IN SPIN_LOCK *Token
);
/**
Checks status of specified AP.
This function checks whether the specified AP has finished the task assigned
by StartupThisAP(), and whether timeout expires.
@param[in] Token This parameter describes the token that was passed into DispatchProcedure or
BroadcastProcedure.
@retval EFI_SUCCESS Specified AP has finished task assigned by StartupThisAPs().
@retval EFI_NOT_READY Specified AP has not finished task and timeout has not expired.
**/
EFI_STATUS
IsApReady (
IN SPIN_LOCK *Token
);
/**
Check whether it is an present AP.
@param CpuIndex The AP index which calls this function.
@retval TRUE It's a present AP.
@retval TRUE This is not an AP or it is not present.
**/
BOOLEAN
IsPresentAp (
IN UINTN CpuIndex
);
/**
Worker function to execute a caller provided function on all enabled APs.
@param[in] Procedure A pointer to the function to be run on
enabled APs of the system.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
APs to return from Procedure, either for
blocking or non-blocking mode.
@param[in,out] ProcedureArguments The parameter passed into Procedure for
all APs.
@param[in,out] Token This is an optional parameter that allows the caller to execute the
procedure in a blocking or non-blocking fashion. If it is NULL the
call is blocking, and the call will not return until the AP has
completed the procedure. If the token is not NULL, the call will
return immediately. The caller can check whether the procedure has
completed with CheckOnProcedure or WaitForProcedure.
@param[in,out] CPUStatus This optional pointer may be used to get the status code returned
by Procedure when it completes execution on the target AP, or with
EFI_TIMEOUT if the Procedure fails to complete within the optional
timeout. The implementation will update this variable with
EFI_NOT_READY prior to starting Procedure on the target AP.
@retval EFI_SUCCESS In blocking mode, all APs have finished before
the timeout expired.
@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
to all enabled APs.
@retval others Failed to Startup all APs.
**/
EFI_STATUS
InternalSmmStartupAllAPs (
IN EFI_AP_PROCEDURE2 Procedure,
IN UINTN TimeoutInMicroseconds,
IN OUT VOID *ProcedureArguments OPTIONAL,
IN OUT MM_COMPLETION *Token,
IN OUT EFI_STATUS *CPUStatus
);
/**
Register the SMM Foundation entry point.
@param[in] Procedure A pointer to the code stream to be run on the designated target AP
of the system. Type EFI_AP_PROCEDURE is defined below in Volume 2
with the related definitions of
EFI_MP_SERVICES_PROTOCOL.StartupAllAPs.
If caller may pass a value of NULL to deregister any existing
startup procedure.
@param[in,out] ProcedureArguments Allows the caller to pass a list of parameters to the code that is
run by the AP. It is an optional common mailbox between APs and
the caller to share information
@retval EFI_SUCCESS The Procedure has been set successfully.
@retval EFI_INVALID_PARAMETER The Procedure is NULL but ProcedureArguments not NULL.
**/
EFI_STATUS
RegisterStartupProcedure (
IN EFI_AP_PROCEDURE Procedure,
IN OUT VOID *ProcedureArguments OPTIONAL
);
/**
Initialize PackageBsp Info. Processor specified by mPackageFirstThreadIndex[PackageIndex]
will do the package-scope register programming. Set default CpuIndex to (UINT32)-1, which
means not specified yet.
**/
VOID
InitPackageFirstThreadIndexInfo (
VOID
);
/**
Allocate buffer for SpinLock and Wrapper function buffer.
**/
VOID
InitializeDataForMmMp (
VOID
);
/**
Return whether access to non-SMRAM is restricted.
@retval TRUE Access to non-SMRAM is restricted.
@retval FALSE Access to non-SMRAM is not restricted.
**/
BOOLEAN
IsRestrictedMemoryAccess (
VOID
);
/**
Choose blocking or non-blocking mode to Wait for all APs.
@param[in] This A pointer to the EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL instance.
@param[in] BlockingMode Blocking or non-blocking mode.
@retval EFI_SUCCESS All APs have arrived SMM mode except SMI disabled APs.
@retval EFI_TIMEOUT There are APs not in SMM mode in given timeout constraint.
**/
EFI_STATUS
EFIAPI
SmmCpuRendezvous (
IN EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL *This,
IN BOOLEAN BlockingMode
);
/**
Insure when this function returns, no AP will execute normal mode code before entering SMM, except SMI disabled APs.
**/
VOID
SmmWaitForApArrival (
VOID
);
/**
Write unprotect read-only pages if Cr0.Bits.WP is 1.
@param[out] WriteProtect If Cr0.Bits.WP is enabled.
**/
VOID
SmmWriteUnprotectReadOnlyPage (
OUT BOOLEAN *WriteProtect
);
/**
Write protect read-only pages.
@param[in] WriteProtect If Cr0.Bits.WP should be enabled.
**/
VOID
SmmWriteProtectReadOnlyPage (
IN BOOLEAN WriteProtect
);
///
/// Define macros to encapsulate the write unprotect/protect
/// read-only pages.
/// Below pieces of logic are defined as macros and not functions
/// because "CET" feature disable & enable must be in the same
/// function to avoid shadow stack and normal SMI stack mismatch,
/// thus WRITE_UNPROTECT_RO_PAGES () must be called pair with
/// WRITE_PROTECT_RO_PAGES () in same function.
///
/// @param[in,out] Wp A BOOLEAN variable local to the containing
/// function, carrying write protection status from
/// WRITE_UNPROTECT_RO_PAGES() to
/// WRITE_PROTECT_RO_PAGES().
///
/// @param[in,out] Cet A BOOLEAN variable local to the containing
/// function, carrying control flow integrity
/// enforcement status from
/// WRITE_UNPROTECT_RO_PAGES() to
/// WRITE_PROTECT_RO_PAGES().
///
#define WRITE_UNPROTECT_RO_PAGES(Wp, Cet) \
do { \
Cet = ((AsmReadCr4 () & CR4_CET_ENABLE) != 0); \
if (Cet) { \
DisableCet (); \
} \
SmmWriteUnprotectReadOnlyPage (&Wp); \
} while (FALSE)
#define WRITE_PROTECT_RO_PAGES(Wp, Cet) \
do { \
SmmWriteProtectReadOnlyPage (Wp); \
if (Cet) { \
EnableCet (); \
} \
} while (FALSE)
#endif
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