SmmProfileArch.c File Reference

#include "PiSmmCpuCommon.h"
#include "SmmProfileInternal.h"

Go to the source code of this file.

Functions
VOID	InitSmmS3Cr3 (OUT UINTN *Cr3)
VOID	InitPagesForPFHandler (VOID)
VOID	AcquirePage (UINT64 *Uplink)
VOID	SmmProfileMapPFAddress (VOID)
VOID	RestorePageTableAbove4G (UINT64 *PageTable, UINT64 PFAddress, UINTN CpuIndex, UINTN ErrorCode, BOOLEAN *IsValidPFAddress)
VOID	ClearTrapFlag (IN OUT EFI_SYSTEM_CONTEXT SystemContext)

Variables
UINTN	mPFPageIndex
UINT64	mPFPageBuffer
UINT64 *	mPFPageUplink [MAX_PF_PAGE_COUNT]

Detailed Description

X64 processor specific functions to enable SMM profile.

Copyright (c) 2012 - 2024, Intel Corporation. All rights reserved.
Copyright (c) 2017, AMD Incorporated. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file SmmProfileArch.c.

Function Documentation

AcquirePage()

VOID AcquirePage

(

UINT64 *

Uplink

)

Allocate one page for creating 4KB-page based on 2MB-page.

Parameters

Uplink

The address of Page-Directory entry.

Definition at line 84 of file SmmProfileArch.c.

ClearTrapFlag()

VOID ClearTrapFlag

(

IN OUT EFI_SYSTEM_CONTEXT

SystemContext

)

Clear TF in FLAGS.

Parameters

SystemContext

A pointer to the processor context when the interrupt occurred on the processor.

Definition at line 473 of file SmmProfileArch.c.

InitPagesForPFHandler()

VOID InitPagesForPFHandler

(

VOID

)

Allocate pages for creating 4KB-page based on 2MB-page when page fault happens.

Definition at line 56 of file SmmProfileArch.c.

InitSmmS3Cr3()

VOID InitSmmS3Cr3

(

OUT UINTN *

Cr3

)

Create SMM page table for S3 path.

Parameters

[out]

Cr3

The base address of the page tables.

Definition at line 36 of file SmmProfileArch.c.

RestorePageTableAbove4G()

VOID RestorePageTableAbove4G	(	UINT64 *	PageTable,
		UINT64	PFAddress,
		UINTN	CpuIndex,
		UINTN	ErrorCode,
		BOOLEAN *	IsValidPFAddress
	)

Update page table to map the memory correctly in order to make the instruction which caused page fault execute successfully. And it also save the original page table to be restored in single-step exception.

Parameters

PageTable	PageTable Address.
PFAddress	The memory address which caused page fault exception.
CpuIndex	The index of the processor.
ErrorCode	The Error code of exception.
IsValidPFAddress	The flag indicates if SMM profile data need be added.

Definition at line 275 of file SmmProfileArch.c.

SmmProfileMapPFAddress()

VOID SmmProfileMapPFAddress

(

VOID

)

Create new entry in page table for page fault address in SmmProfilePFHandler.

Definition at line 117 of file SmmProfileArch.c.

Variable Documentation

mPFPageBuffer

UINT64 mPFPageBuffer

Definition at line 22 of file SmmProfileArch.c.

mPFPageIndex

UINTN mPFPageIndex

Definition at line 17 of file SmmProfileArch.c.

mPFPageUplink

UINT64* mPFPageUplink[MAX_PF_PAGE_COUNT]

Definition at line 27 of file SmmProfileArch.c.