From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001 From: Angelos Mouzakitis Date: Tue, 10 Oct 2023 14:33:42 +0000 Subject: Add submodule dependency files Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec --- .../OvmfPkg/Include/Library/MemEncryptSevLib.h | 118 +++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h (limited to 'roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h') diff --git a/roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h b/roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h new file mode 100644 index 000000000..fc70b0114 --- /dev/null +++ b/roms/edk2/OvmfPkg/Include/Library/MemEncryptSevLib.h @@ -0,0 +1,118 @@ +/** @file + + Define Secure Encrypted Virtualization (SEV) base library helper function + + Copyright (c) 2017, AMD Incorporated. All rights reserved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef _MEM_ENCRYPT_SEV_LIB_H_ +#define _MEM_ENCRYPT_SEV_LIB_H_ + +#include + +/** + Returns a boolean to indicate whether SEV-ES is enabled. + + @retval TRUE SEV-ES is enabled + @retval FALSE SEV-ES is not enabled +**/ +BOOLEAN +EFIAPI +MemEncryptSevEsIsEnabled ( + VOID + ); + +/** + Returns a boolean to indicate whether SEV is enabled + + @retval TRUE SEV is enabled + @retval FALSE SEV is not enabled +**/ +BOOLEAN +EFIAPI +MemEncryptSevIsEnabled ( + 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. + @param[in] Flush Flush the caches before clearing the bit + (mostly TRUE except MMIO addresses) + + @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 +MemEncryptSevClearPageEncMask ( + IN PHYSICAL_ADDRESS Cr3BaseAddress, + IN PHYSICAL_ADDRESS BaseAddress, + IN UINTN NumPages, + IN BOOLEAN Flush + ); + +/** + 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. + @param[in] Flush Flush the caches before setting the bit + (mostly TRUE except MMIO addresses) + + @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 +MemEncryptSevSetPageEncMask ( + IN PHYSICAL_ADDRESS Cr3BaseAddress, + IN PHYSICAL_ADDRESS BaseAddress, + IN UINTN NumPages, + IN BOOLEAN Flush + ); + + +/** + Locate the page range that covers the initial (pre-SMBASE-relocation) SMRAM + Save State Map. + + @param[out] BaseAddress The base address of the lowest-address page that + covers the initial SMRAM Save State Map. + + @param[out] NumberOfPages The number of pages in the page range that covers + the initial SMRAM Save State Map. + + @retval RETURN_SUCCESS BaseAddress and NumberOfPages have been set on + output. + + @retval RETURN_UNSUPPORTED SMM is unavailable. +**/ +RETURN_STATUS +EFIAPI +MemEncryptSevLocateInitialSmramSaveStateMapPages ( + OUT UINTN *BaseAddress, + OUT UINTN *NumberOfPages + ); +#endif // _MEM_ENCRYPT_SEV_LIB_H_ -- cgit 1.2.3-korg