OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c

   1 /** @file
   2
   3   SEV-SNP Page Validation functions.
   4
   5   Copyright (c) 2021 AMD Incorporated. All rights reserved.<BR>
   6
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #include <Uefi/UefiBaseType.h>
  12 #include <Library/BaseLib.h>
  13 #include <Library/MemEncryptSevLib.h>
  14
  15 #include "SnpPageStateChange.h"
  16
  17 /**
  18   Pre-validate the system RAM when SEV-SNP is enabled in the guest VM.
  19
  20   @param[in]  BaseAddress             Base address
  21   @param[in]  NumPages                Number of pages starting from the base address
  22
  23 **/
  24 VOID
  25 EFIAPI
  26 MemEncryptSevSnpPreValidateSystemRam (
  27   IN PHYSICAL_ADDRESS  BaseAddress,
  28   IN UINTN             NumPages
  29   )
  30 {
  31   if (!MemEncryptSevSnpIsEnabled ()) {
  32     return;
  33   }
  34
  35   InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
  36 }