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 #include <ConfidentialComputingGuestAttr.h>
  14 #include <IndustryStandard/Tpm20.h>
  15
  16 //
  17 // Confidential computing work area header definition. Any change
  18 // to the structure need to be kept in sync with the
  19 // PcdOvmfConfidentialComputingWorkAreaHeader.
  20 //
  21 // PcdOvmfConfidentialComputingWorkAreaHeader ==
  22 //   sizeof (CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER)
  23 // PcdOvmfConfidentialComputingWorkAreaHeader defined in:
  24 //   OvmfPkg/OvmfPkg.dec
  25 //   OvmfPkg/Include/Fdf/OvmfPkgDefines.fdf.inc
  26 typedef struct _CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER {
  27   UINT8    GuestType;
  28   UINT8    Reserved1[3];
  29 } CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER;
  30
  31 //
  32 // Internal structure for holding SEV-ES information needed during SEC phase
  33 // and valid only during SEC phase and early PEI during platform
  34 // initialization.
  35 //
  36 // This structure is also used by assembler files:
  37 //   OvmfPkg/ResetVector/ResetVector.nasmb
  38 //   OvmfPkg/ResetVector/Ia32/PageTables64.asm
  39 //   OvmfPkg/ResetVector/Ia32/Flat32ToFlat64.asm
  40 // any changes must stay in sync with its usage.
  41 //
  42 typedef struct _SEC_SEV_ES_WORK_AREA {
  43   //
  44   // Hold the SevStatus MSR value read by OvmfPkg/ResetVector/Ia32/AmdSev.c
  45   //
  46   UINT64    SevStatusMsrValue;
  47
  48   UINT64    RandomData;
  49
  50   UINT64    EncryptionMask;
  51
  52   //
  53   // Indicator that the VC handler is called. It is used during the SevFeature
  54   // detection in OvmfPkg/ResetVector/Ia32/AmdSev.c
  55   //
  56   UINT8     ReceivedVc;
  57 } SEC_SEV_ES_WORK_AREA;
  58
  59 //
  60 // The SEV work area definition.
  61 //
  62 typedef struct _SEV_WORK_AREA {
  63   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER    Header;
  64
  65   SEC_SEV_ES_WORK_AREA                       SevEsWorkArea;
  66 } SEV_WORK_AREA;
  67
  68 //
  69 // Start of TDX Specific WorkArea definition
  70 //
  71
  72 #define TDX_MEASUREMENT_TDHOB_BITMASK   0x1
  73 #define TDX_MEASUREMENT_CFVIMG_BITMASK  0x2
  74
  75 typedef struct _TDX_MEASUREMENTS_DATA {
  76   UINT32    MeasurementsBitmap;
  77   UINT8     TdHobHashValue[SHA384_DIGEST_SIZE];
  78   UINT8     CfvImgHashValue[SHA384_DIGEST_SIZE];
  79 } TDX_MEASUREMENTS_DATA;
  80
  81 //
  82 // The TDX work area definition
  83 //
  84 typedef struct _SEC_TDX_WORK_AREA {
  85   UINT32                   PageTableReady;
  86   UINT32                   Gpaw;
  87   UINT64                   HobList;
  88   TDX_MEASUREMENTS_DATA    TdxMeasurementsData;
  89 } SEC_TDX_WORK_AREA;
  90
  91 typedef struct _TDX_WORK_AREA {
  92   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER    Header;
  93   SEC_TDX_WORK_AREA                          SecTdxWorkArea;
  94 } TDX_WORK_AREA;
  95
  96 //
  97 // End of TDX Specific WorkArea definition
  98 //
  99
 100 typedef union {
 101   CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER    Header;
 102   SEV_WORK_AREA                              SevWorkArea;
 103   TDX_WORK_AREA                              TdxWorkArea;
 104 } OVMF_WORK_AREA;
 105
 106 #endif