OvmfPkg/PlatformPei/IntelTdx.c

   1 /** @file
   2   Initialize Intel TDX support.
   3
   4   Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
   5
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <PiPei.h>
  11 #include <Library/BaseLib.h>
  12 #include <Library/DebugLib.h>
  13 #include <Library/HobLib.h>
  14 #include <Library/BaseMemoryLib.h>
  15 #include <Library/MemoryAllocationLib.h>
  16 #include <IndustryStandard/Tdx.h>
  17 #include <IndustryStandard/QemuFwCfg.h>
  18 #include <Library/QemuFwCfgLib.h>
  19 #include <Library/PeiServicesLib.h>
  20 #include <Library/TdxLib.h>
  21 #include <Library/PlatformInitLib.h>
  22 #include <WorkArea.h>
  23 #include <ConfidentialComputingGuestAttr.h>
  24 #include "Platform.h"
  25
  26 /**
  27   This Function checks if TDX is available, if present then it sets
  28   the dynamic PCDs for Tdx guest.
  29   **/
  30 VOID
  31 IntelTdxInitialize (
  32   VOID
  33   )
  34 {
  35  #ifdef MDE_CPU_X64
  36   RETURN_STATUS  PcdStatus;
  37
  38   if (!TdIsEnabled ()) {
  39     return;
  40   }
  41
  42   PcdStatus = PcdSet64S (PcdConfidentialComputingGuestAttr, CCAttrIntelTdx);
  43   ASSERT_RETURN_ERROR (PcdStatus);
  44
  45   PcdStatus = PcdSet64S (PcdTdxSharedBitMask, TdSharedPageMask ());
  46   ASSERT_RETURN_ERROR (PcdStatus);
  47
  48   PcdStatus = PcdSetBoolS (PcdSetNxForStack, TRUE);
  49   ASSERT_RETURN_ERROR (PcdStatus);
  50  #endif
  51 }