OvmfPkg/MemEncryptSevLib: add support to validate system RAM

[mirror_edk2.git] / OvmfPkg / Library / BaseMemEncryptSevLib / X64 / SecSnpSystemRamValidate.c

/** @file\r
\r
  SEV-SNP Page Validation functions.\r
\r
  Copyright (c) 2021 AMD Incorporated. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Uefi/UefiBaseType.h>\r
#include <Library/BaseLib.h>\r
#include <Library/MemEncryptSevLib.h>\r
\r
#include "SnpPageStateChange.h"\r
\r
/**\r
  Pre-validate the system RAM when SEV-SNP is enabled in the guest VM.\r
\r
  @param[in]  BaseAddress             Base address\r
  @param[in]  NumPages                Number of pages starting from the base address\r
\r
**/\r
VOID\r
EFIAPI\r
MemEncryptSevSnpPreValidateSystemRam (\r
  IN PHYSICAL_ADDRESS  BaseAddress,\r
  IN UINTN             NumPages\r
  )\r
{\r
  if (!MemEncryptSevSnpIsEnabled ()) {\r
    return;\r
  }\r
\r
  InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);\r
}\r