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 } GUEST_TYPE;
  21
  22 //
  23 // Confidential computing work area header definition. Any change
  24 // to the structure need to be kept in sync with the
  25 // PcdOvmfConfidentialComputingWorkAreaHeader.
  26 //
  27 // PcdOvmfConfidentialComputingWorkAreaHeader ==
  28 //   sizeof (CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER)
  29 // PcdOvmfConfidentialComputingWorkAreaHeader defined in:
  30 //   OvmfPkg/OvmfPkg.dec
  31 //   OvmfPkg/OvmfPkgDefines.fdf.inc
  32 typedef struct _CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER {
  33   UINT8    GuestType;
  34   UINT8    Reserved1[3];
  35 } CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER;
  36
  37 //
  38 // Internal structure for holding SEV-ES information needed during SEC phase
  39 // and valid only during SEC phase and early PEI during platform
  40 // initialization.
  41 //
  42 // This structure is also used by assembler files:
  43 //   OvmfPkg/ResetVector/ResetVector.nasmb
  44 //   OvmfPkg/ResetVector/Ia32/PageTables64.asm
  45 //   OvmfPkg/ResetVector/Ia32/Flat32ToFlat64.asm
  46 // any changes must stay in sync with its usage.
  47 //
  48 typedef struct _SEC_SEV_ES_WORK_AREA {
  49   UINT8     SevEsEnabled;
  50   UINT8     Reserved1[7];
  51
  52   UINT64    RandomData;
  53
  54   UINT64    EncryptionMask;
  55 } SEC_SEV_ES_WORK_AREA;
  56
  57 //
  58 // The SEV work area definition.
  59 //
  60 typedef struct _SEV_WORK_AREA {
  61   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER    Header;
  62
  63   SEC_SEV_ES_WORK_AREA                       SevEsWorkArea;
  64 } SEV_WORK_AREA;
  65
  66 typedef union {
  67   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER    Header;
  68   SEV_WORK_AREA                              SevWorkArea;
  69 } OVMF_WORK_AREA;
  70
  71 #endif