SecMemEncryptSevLibInternal.c File Reference

#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/MemEncryptSevLib.h>
#include <Library/PcdLib.h>
#include <Register/Amd/Cpuid.h>
#include <Register/Amd/Msr.h>
#include <Register/Cpuid.h>
#include <Uefi/UefiBaseType.h>

Go to the source code of this file.

Functions
STATIC SEC_SEV_ES_WORK_AREA *EFIAPI	GetSevEsWorkArea (VOID)
STATIC UINT32 EFIAPI	InternalMemEncryptSevStatus (VOID)
BOOLEAN EFIAPI	MemEncryptSevSnpIsEnabled (VOID)
BOOLEAN EFIAPI	MemEncryptSevEsIsEnabled (VOID)
BOOLEAN EFIAPI	MemEncryptSevIsEnabled (VOID)
UINT64 EFIAPI	MemEncryptSevGetEncryptionMask (VOID)
BOOLEAN EFIAPI	MemEncryptSevEsDebugVirtualizationIsEnabled (VOID)
RETURN_STATUS EFIAPI	MemEncryptSevLocateInitialSmramSaveStateMapPages (OUT UINTN *BaseAddress, OUT UINTN *NumberOfPages)

Detailed Description

Secure Encrypted Virtualization (SEV) library helper function

Copyright (c) 2020, Advanced Micro Devices, Inc. All rights reserved.

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

Definition in file SecMemEncryptSevLibInternal.c.

Function Documentation

GetSevEsWorkArea()

STATIC SEC_SEV_ES_WORK_AREA *EFIAPI GetSevEsWorkArea

(

VOID

)

Read the workarea to determine whether SEV is enabled. If enabled, then return the SevEsWorkArea pointer.

Definition at line 28 of file SecMemEncryptSevLibInternal.c.

InternalMemEncryptSevStatus()

STATIC UINT32 EFIAPI InternalMemEncryptSevStatus

(

VOID

)

Read the SEV Status MSR value from the workarea

Definition at line 53 of file SecMemEncryptSevLibInternal.c.

MemEncryptSevEsDebugVirtualizationIsEnabled()

BOOLEAN EFIAPI MemEncryptSevEsDebugVirtualizationIsEnabled

(

VOID

)

Returns a boolean to indicate whether DebugVirtualization is enabled.

Return values

TRUE	DebugVirtualization is enabled
FALSE	DebugVirtualization is not enabled

Definition at line 153 of file SecMemEncryptSevLibInternal.c.

MemEncryptSevEsIsEnabled()

BOOLEAN EFIAPI MemEncryptSevEsIsEnabled

(

VOID

)

Returns a boolean to indicate whether SEV-ES is enabled.

Return values

TRUE	SEV-ES is enabled
FALSE	SEV-ES is not enabled

Definition at line 94 of file SecMemEncryptSevLibInternal.c.

MemEncryptSevGetEncryptionMask()

UINT64 EFIAPI MemEncryptSevGetEncryptionMask

(

VOID

)

Returns the SEV encryption mask.

Returns

The SEV pagtable encryption mask

Definition at line 131 of file SecMemEncryptSevLibInternal.c.

MemEncryptSevIsEnabled()

BOOLEAN EFIAPI MemEncryptSevIsEnabled

(

VOID

)

Returns a boolean to indicate whether SEV is enabled.

Return values

TRUE	SEV is enabled
FALSE	SEV is not enabled

Definition at line 113 of file SecMemEncryptSevLibInternal.c.

MemEncryptSevLocateInitialSmramSaveStateMapPages()

RETURN_STATUS EFIAPI MemEncryptSevLocateInitialSmramSaveStateMapPages	(	OUT UINTN *	BaseAddress,
		OUT UINTN *	NumberOfPages
	)

Locate the page range that covers the initial (pre-SMBASE-relocation) SMRAM Save State Map.

Parameters

[out]	BaseAddress	The base address of the lowest-address page that covers the initial SMRAM Save State Map.
[out]	NumberOfPages	The number of pages in the page range that covers the initial SMRAM Save State Map.

Return values

RETURN_SUCCESS	BaseAddress and NumberOfPages have been set on output.
RETURN_UNSUPPORTED	SMM is unavailable.

Definition at line 181 of file SecMemEncryptSevLibInternal.c.

MemEncryptSevSnpIsEnabled()

BOOLEAN EFIAPI MemEncryptSevSnpIsEnabled

(

VOID

)

Returns a boolean to indicate whether SEV-SNP is enabled.

Return values

TRUE	SEV-SNP is enabled
FALSE	SEV-SNP is not enabled

Definition at line 75 of file SecMemEncryptSevLibInternal.c.