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