mirror of https://github.com/acidanthera/audk.git
82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/** @file
|
|
|
|
Define Memory Encrypted Virtualization base library helper function
|
|
|
|
Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
|
|
Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#ifndef MEM_ENCRYPT_TDX_LIB_H_
|
|
#define MEM_ENCRYPT_TDX_LIB_H_
|
|
|
|
#include <Base.h>
|
|
|
|
/**
|
|
Returns boolean to indicate whether to indicate which, if any, memory encryption is enabled
|
|
|
|
@param[in] Type Bitmask of encryption technologies to check is enabled
|
|
|
|
@retval TRUE The encryption type(s) are enabled
|
|
@retval FALSE The encryption type(s) are not enabled
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
MemEncryptTdxIsEnabled (
|
|
VOID
|
|
);
|
|
|
|
/**
|
|
This function clears memory encryption bit for the memory region specified by
|
|
BaseAddress and NumPages from the current page table context.
|
|
|
|
@param[in] Cr3BaseAddress Cr3 Base Address (if zero then use
|
|
current CR3)
|
|
@param[in] BaseAddress The physical address that is the start
|
|
address of a memory region.
|
|
@param[in] NumPages The number of pages from start memory
|
|
region.
|
|
|
|
@retval RETURN_SUCCESS The attributes were cleared for the
|
|
memory region.
|
|
@retval RETURN_INVALID_PARAMETER Number of pages is zero.
|
|
@retval RETURN_UNSUPPORTED Clearing the memory encryption attribute
|
|
is not supported
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
MemEncryptTdxSetPageSharedBit (
|
|
IN PHYSICAL_ADDRESS Cr3BaseAddress,
|
|
IN PHYSICAL_ADDRESS BaseAddress,
|
|
IN UINTN NumPages
|
|
);
|
|
|
|
/**
|
|
This function sets memory encryption bit for the memory region specified by
|
|
BaseAddress and NumPages from the current page table context.
|
|
|
|
@param[in] Cr3BaseAddress Cr3 Base Address (if zero then use
|
|
current CR3)
|
|
@param[in] BaseAddress The physical address that is the start
|
|
address of a memory region.
|
|
@param[in] NumPages The number of pages from start memory
|
|
region.
|
|
|
|
@retval RETURN_SUCCESS The attributes were set for the memory
|
|
region.
|
|
@retval RETURN_INVALID_PARAMETER Number of pages is zero.
|
|
@retval RETURN_UNSUPPORTED Setting the memory encryption attribute
|
|
is not supported
|
|
**/
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
MemEncryptTdxClearPageSharedBit (
|
|
IN PHYSICAL_ADDRESS Cr3BaseAddress,
|
|
IN PHYSICAL_ADDRESS BaseAddress,
|
|
IN UINTN NumPages
|
|
);
|
|
|
|
#endif // _MEM_ENCRYPT_TDX_LIB_H_
|