ac0a286f4d
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the OvmfPkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Andrew Fish <afish@apple.com>
127 lines
4.0 KiB
C
127 lines
4.0 KiB
C
/** @file
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Virtual Memory Management Services to set or clear the memory encryption bit
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Copyright (c) 2020, 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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#include <Library/CpuLib.h>
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#include <Library/MemEncryptSevLib.h>
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#include "VirtualMemory.h"
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/**
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Return the pagetable memory encryption mask.
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@return The pagetable memory encryption mask.
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**/
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UINT64
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EFIAPI
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InternalGetMemEncryptionAddressMask (
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VOID
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)
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{
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UINT64 EncryptionMask;
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EncryptionMask = MemEncryptSevGetEncryptionMask ();
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EncryptionMask &= PAGING_1G_ADDRESS_MASK_64;
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return EncryptionMask;
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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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PhysicalAddress and Length 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] PhysicalAddress The physical address that is the start
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address of a memory region.
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@param[in] Length The length of memory 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 encyrption 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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InternalMemEncryptSevSetMemoryDecrypted (
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IN PHYSICAL_ADDRESS Cr3BaseAddress,
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IN PHYSICAL_ADDRESS PhysicalAddress,
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IN UINTN Length
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)
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{
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//
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// This function is not available during SEC.
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//
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return RETURN_UNSUPPORTED;
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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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PhysicalAddress and Length 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] PhysicalAddress The physical address that is the start
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address of a memory region.
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@param[in] Length The length of memory region
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@param[in] Flush Flush the caches before applying the
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encryption mask
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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 encyrption 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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InternalMemEncryptSevSetMemoryEncrypted (
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IN PHYSICAL_ADDRESS Cr3BaseAddress,
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IN PHYSICAL_ADDRESS PhysicalAddress,
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IN UINTN Length
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)
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{
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//
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// This function is not available during SEC.
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//
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return RETURN_UNSUPPORTED;
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}
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/**
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This function clears memory encryption bit for the MMIO region specified by
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PhysicalAddress and Length.
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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] PhysicalAddress The physical address that is the start
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address of a MMIO region.
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@param[in] Length The length of memory 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 Length is zero.
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@retval RETURN_UNSUPPORTED Clearing the memory encyrption 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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InternalMemEncryptSevClearMmioPageEncMask (
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IN PHYSICAL_ADDRESS Cr3BaseAddress,
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IN PHYSICAL_ADDRESS PhysicalAddress,
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IN UINTN Length
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)
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{
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//
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// This function is not available during SEC.
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//
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return RETURN_UNSUPPORTED;
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}
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