OvmfPkg/Include/WorkArea.h

   1 /** @file
   2
   3   Work Area structure definition
   4
   5   Copyright (c) 2021, AMD Inc.
   6
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8 **/
   9
  10 #ifndef __OVMF_WORK_AREA_H__
  11 #define __OVMF_WORK_AREA_H__
  12
  13 //
  14 // Guest type for the work area
  15 //
  16 typedef enum {
  17   GUEST_TYPE_NON_ENCRYPTED,
  18   GUEST_TYPE_AMD_SEV,
  19   GUEST_TYPE_INTEL_TDX,
  20
  21 } GUEST_TYPE;
  22
  23 //
  24 // Confidential computing work area header definition. Any change
  25 // to the structure need to be kept in sync with the
  26 // PcdOvmfConfidentialComputingWorkAreaHeader.
  27 //
  28 // PcdOvmfConfidentialComputingWorkAreaHeader ==
  29 //   sizeof (CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER)
  30 // PcdOvmfConfidentialComputingWorkAreaHeader defined in:
  31 //   OvmfPkg/OvmfPkg.dec
  32 //   OvmfPkg/OvmfPkgDefines.fdf.inc
  33 typedef struct _CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER {
  34   UINT8                   GuestType;
  35   UINT8                   Reserved1[3];
  36 } CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER;
  37
  38 //
  39 // Internal structure for holding SEV-ES information needed during SEC phase
  40 // and valid only during SEC phase and early PEI during platform
  41 // initialization.
  42 //
  43 // This structure is also used by assembler files:
  44 //   OvmfPkg/ResetVector/ResetVector.nasmb
  45 //   OvmfPkg/ResetVector/Ia32/PageTables64.asm
  46 //   OvmfPkg/ResetVector/Ia32/Flat32ToFlat64.asm
  47 // any changes must stay in sync with its usage.
  48 //
  49 typedef struct _SEC_SEV_ES_WORK_AREA {
  50   UINT8    SevEsEnabled;
  51   UINT8    Reserved1[7];
  52
  53   UINT64   RandomData;
  54
  55   UINT64   EncryptionMask;
  56 } SEC_SEV_ES_WORK_AREA;
  57
  58 //
  59 // The SEV work area definition.
  60 //
  61 typedef struct _SEV_WORK_AREA {
  62   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER   Header;
  63
  64   SEC_SEV_ES_WORK_AREA                      SevEsWorkArea;
  65 } SEV_WORK_AREA;
  66
  67 typedef union {
  68   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER   Header;
  69   SEV_WORK_AREA                             SevWorkArea;
  70 } OVMF_WORK_AREA;
  71
  72 #endif