OvmfPkg/AmdSev: reserve snp pages

[mirror_edk2.git] / OvmfPkg / Include / WorkArea.h

/** @file\r
\r
  Work Area structure definition\r
\r
  Copyright (c) 2021, AMD Inc.\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#ifndef __OVMF_WORK_AREA_H__\r
#define __OVMF_WORK_AREA_H__\r
\r
//\r
// Guest type for the work area\r
//\r
typedef enum {\r
  GUEST_TYPE_NON_ENCRYPTED,\r
  GUEST_TYPE_AMD_SEV,\r
  GUEST_TYPE_INTEL_TDX,\r
} GUEST_TYPE;\r
\r
//\r
// Confidential computing work area header definition. Any change\r
// to the structure need to be kept in sync with the\r
// PcdOvmfConfidentialComputingWorkAreaHeader.\r
//\r
// PcdOvmfConfidentialComputingWorkAreaHeader ==\r
//   sizeof (CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER)\r
// PcdOvmfConfidentialComputingWorkAreaHeader defined in:\r
//   OvmfPkg/OvmfPkg.dec\r
//   OvmfPkg/OvmfPkgDefines.fdf.inc\r
typedef struct _CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER {\r
  UINT8    GuestType;\r
  UINT8    Reserved1[3];\r
} CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER;\r
\r
//\r
// Internal structure for holding SEV-ES information needed during SEC phase\r
// and valid only during SEC phase and early PEI during platform\r
// initialization.\r
//\r
// This structure is also used by assembler files:\r
//   OvmfPkg/ResetVector/ResetVector.nasmb\r
//   OvmfPkg/ResetVector/Ia32/PageTables64.asm\r
//   OvmfPkg/ResetVector/Ia32/Flat32ToFlat64.asm\r
// any changes must stay in sync with its usage.\r
//\r
typedef struct _SEC_SEV_ES_WORK_AREA {\r
  UINT8     SevEsEnabled;\r
  UINT8     Reserved1[7];\r
\r
  UINT64    RandomData;\r
\r
  UINT64    EncryptionMask;\r
} SEC_SEV_ES_WORK_AREA;\r
\r
//\r
// The SEV work area definition.\r
//\r
typedef struct _SEV_WORK_AREA {\r
  CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER    Header;\r
\r
  SEC_SEV_ES_WORK_AREA                       SevEsWorkArea;\r
} SEV_WORK_AREA;\r
\r
typedef union {\r
  CONFIDENTIAL_COMPUTING_WORK_AREA_HEADER    Header;\r
  SEV_WORK_AREA                              SevWorkArea;\r
} OVMF_WORK_AREA;\r
\r
#endif\r