PeiSnpSystemRamValidate.c File Reference

#include <Uefi/UefiBaseType.h>
#include <Library/BaseLib.h>
#include <Library/PcdLib.h>
#include <Library/DebugLib.h>
#include <Library/MemEncryptSevLib.h>
#include "SnpPageStateChange.h"
#include "VirtualMemory.h"

Go to the source code of this file.

Data Structures
struct	SNP_PRE_VALIDATED_RANGE

Functions
STATIC BOOLEAN	DetectPreValidatedOverLap (IN PHYSICAL_ADDRESS StartAddress, IN PHYSICAL_ADDRESS EndAddress, OUT SNP_PRE_VALIDATED_RANGE *OverlapRange)
VOID EFIAPI	MemEncryptSevSnpPreValidateSystemRam (IN PHYSICAL_ADDRESS BaseAddress, IN UINTN NumPages)

Variables
STATIC UINT8	mPscBufferPage [EFI_PAGE_SIZE]
STATIC SNP_PRE_VALIDATED_RANGE	mPreValidatedRange []

Detailed Description

SEV-SNP Page Validation functions.

Copyright (c) 2021 - 2024, AMD Incorporated. All rights reserved.

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

Definition in file PeiSnpSystemRamValidate.c.

Function Documentation

DetectPreValidatedOverLap()

STATIC BOOLEAN DetectPreValidatedOverLap	(	IN PHYSICAL_ADDRESS	StartAddress,
		IN PHYSICAL_ADDRESS	EndAddress,
		OUT SNP_PRE_VALIDATED_RANGE *	OverlapRange
	)

Definition at line 43 of file PeiSnpSystemRamValidate.c.

MemEncryptSevSnpPreValidateSystemRam()

VOID EFIAPI MemEncryptSevSnpPreValidateSystemRam	(	IN PHYSICAL_ADDRESS	BaseAddress,
		IN UINTN	NumPages
	)

Pre-validate the system RAM when SEV-SNP is enabled in the guest VM.

Parameters

[in]	BaseAddress	Base address
[in]	NumPages	Number of pages starting from the base address

Definition at line 76 of file PeiSnpSystemRamValidate.c.

Variable Documentation

mPreValidatedRange

STATIC SNP_PRE_VALIDATED_RANGE mPreValidatedRange[]

Initial value:

= {
  
  
  {
    FixedPcdGet32 (PcdOvmfSecPageTablesBase),
    FixedPcdGet32 (PcdOvmfPeiMemFvBase),
  },
  
  {
    FixedPcdGet32 (PcdOvmfSecValidatedStart),
    FixedPcdGet32 (PcdOvmfSecValidatedEnd)
  },
}

Definition at line 27 of file PeiSnpSystemRamValidate.c.

mPscBufferPage

STATIC UINT8 mPscBufferPage[EFI_PAGE_SIZE]

Definition at line 20 of file PeiSnpSystemRamValidate.c.