TcgMorLockDxe.c File Reference

#include <PiDxe.h>
#include <Guid/MemoryOverwriteControl.h>
#include <IndustryStandard/MemoryOverwriteRequestControlLock.h>
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include "Variable.h"
#include <Protocol/VariablePolicy.h>
#include <Library/VariablePolicyHelperLib.h>

Go to the source code of this file.

Functions
EFI_STATUS	SetVariableCheckHandlerMor (IN CHAR16 *VariableName, IN EFI_GUID *VendorGuid, IN UINT32 Attributes, IN UINTN DataSize, IN VOID *Data)
EFI_STATUS	MorLockInit (VOID)
VOID	MorLockInitAtEndOfDxe (VOID)

Detailed Description

TCG MOR (Memory Overwrite Request) Lock Control support (DXE version).

This module clears MemoryOverwriteRequestControlLock variable to indicate MOR lock control unsupported.

Copyright (c) 2016, Intel Corporation. All rights reserved.
Copyright (c) Microsoft Corporation. SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file TcgMorLockDxe.c.

Function Documentation

MorLockInit()

EFI_STATUS MorLockInit

(

VOID

)

Initialization for MOR Control Lock.

Return values

EFI_SUCCESS

MorLock initialization success.

Returns

Others Some error occurs.

Definition at line 65 of file TcgMorLockDxe.c.

MorLockInitAtEndOfDxe()

VOID MorLockInitAtEndOfDxe

(

VOID

)

Delayed initialization for MOR Control Lock at EndOfDxe.

This function performs any operations queued by MorLockInit().

Definition at line 109 of file TcgMorLockDxe.c.

SetVariableCheckHandlerMor()

EFI_STATUS SetVariableCheckHandlerMor	(	IN CHAR16 *	VariableName,
		IN EFI_GUID *	VendorGuid,
		IN UINT32	Attributes,
		IN UINTN	DataSize,
		IN VOID *	Data
	)

This service is an MOR/MorLock checker handler for the SetVariable().

Parameters

[in]	VariableName	the name of the vendor's variable, as a Null-Terminated Unicode String
[in]	VendorGuid	Unify identifier for vendor.
[in]	Attributes	Attributes bitmask to set for the variable.
[in]	DataSize	The size in bytes of Data-Buffer.
[in]	Data	Point to the content of the variable.

Return values

EFI_SUCCESS	The MOR/MorLock check pass, and Variable driver can store the variable data.
EFI_INVALID_PARAMETER	The MOR/MorLock data or data size or attributes is not allowed for MOR variable.
EFI_ACCESS_DENIED	The MOR/MorLock is locked.
EFI_ALREADY_STARTED	The MorLock variable is handled inside this function. Variable driver can just return EFI_SUCCESS.

Definition at line 44 of file TcgMorLockDxe.c.