DxeMemEncryptSevLibInternal.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>
#include <ConfidentialComputingGuestAttr.h>

Go to the source code of this file.

Functions
STATIC BOOLEAN	AmdMemEncryptionAttrCheck (IN UINT64 CurrentAttr, IN CONFIDENTIAL_COMPUTING_GUEST_ATTR Attr)
STATIC BOOLEAN EFIAPI	ConfidentialComputingGuestHas (IN CONFIDENTIAL_COMPUTING_GUEST_ATTR Attr)
BOOLEAN EFIAPI	MemEncryptSevSnpIsEnabled (VOID)
BOOLEAN EFIAPI	MemEncryptSevEsIsEnabled (VOID)
BOOLEAN EFIAPI	MemEncryptSevIsEnabled (VOID)
UINT64 EFIAPI	MemEncryptSevGetEncryptionMask (VOID)
BOOLEAN EFIAPI	MemEncryptSevEsDebugVirtualizationIsEnabled (VOID)

Variables
STATIC UINT64	mCurrentAttr = 0
STATIC BOOLEAN	mCurrentAttrRead = FALSE
STATIC UINT64	mSevEncryptionMask = 0
STATIC BOOLEAN	mSevEncryptionMaskSaved = FALSE

Detailed Description

Secure Encrypted Virtualization (SEV) library helper function

Copyright (c) 2017 - 2020, AMD Incorporated. All rights reserved.

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

Definition in file DxeMemEncryptSevLibInternal.c.

Function Documentation

AmdMemEncryptionAttrCheck()

STATIC BOOLEAN AmdMemEncryptionAttrCheck	(	IN UINT64	CurrentAttr,
		IN CONFIDENTIAL_COMPUTING_GUEST_ATTR	Attr
	)

The function check if the specified Attr is set.

Parameters

[in]	CurrentAttr	The current attribute.
[in]	Attr	The attribute to check.

Return values

TRUE	The specified Attr is set.
FALSE	The specified Attr is not set.

Definition at line 38 of file DxeMemEncryptSevLibInternal.c.

ConfidentialComputingGuestHas()

STATIC BOOLEAN EFIAPI ConfidentialComputingGuestHas

(

IN CONFIDENTIAL_COMPUTING_GUEST_ATTR

Attr

)

Check if the specified confidential computing attribute is active.

Parameters

[in]

Attr

The attribute to check.

Return values

TRUE	The specified Attr is active.
FALSE	The specified Attr is not active.

Definition at line 79 of file DxeMemEncryptSevLibInternal.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 177 of file DxeMemEncryptSevLibInternal.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 128 of file DxeMemEncryptSevLibInternal.c.

MemEncryptSevGetEncryptionMask()

UINT64 EFIAPI MemEncryptSevGetEncryptionMask

(

VOID

)

Returns the SEV encryption mask.

Returns

The SEV pagtable encryption mask

Definition at line 157 of file DxeMemEncryptSevLibInternal.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 143 of file DxeMemEncryptSevLibInternal.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 113 of file DxeMemEncryptSevLibInternal.c.

Variable Documentation

mCurrentAttr

STATIC UINT64 mCurrentAttr = 0

Definition at line 21 of file DxeMemEncryptSevLibInternal.c.

mCurrentAttrRead

STATIC BOOLEAN mCurrentAttrRead = FALSE

Definition at line 22 of file DxeMemEncryptSevLibInternal.c.

mSevEncryptionMask

STATIC UINT64 mSevEncryptionMask = 0

Definition at line 23 of file DxeMemEncryptSevLibInternal.c.

mSevEncryptionMaskSaved

STATIC BOOLEAN mSevEncryptionMaskSaved = FALSE

Definition at line 24 of file DxeMemEncryptSevLibInternal.c.