OvmfPkg/ResetVector/X64/OvmfSevMetadata.asm

   1 ;-----------------------------------------------------------------------------
   2 ; @file
   3 ; OVMF metadata for the AMD SEV confidential computing guests
   4 ;
   5 ; Copyright (c) 2021, AMD Inc. All rights reserved.<BR>
   6 ;
   7 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   8 ;-----------------------------------------------------------------------------
   9
  10 BITS  64
  11
  12 %define OVMF_SEV_METADATA_VERSION     1
  13
  14 ; The section must be accepted or validated by the VMM before the boot
  15 %define OVMF_SECTION_TYPE_SNP_SEC_MEM     0x1
  16
  17 ; AMD SEV-SNP specific sections
  18 %define OVMF_SECTION_TYPE_SNP_SECRETS     0x2
  19
  20 ALIGN 16
  21
  22 TIMES (15 - ((OvmfSevGuidedStructureEnd - OvmfSevGuidedStructureStart + 15) % 16)) DB 0
  23
  24 OvmfSevGuidedStructureStart:
  25 ;
  26 ; OvmfSev metadata descriptor
  27 ;
  28 OvmfSevMetadataGuid:
  29
  30 _DescriptorSev:
  31   DB 'A','S','E','V'                                        ; Signature
  32   DD OvmfSevGuidedStructureEnd - _DescriptorSev             ; Length
  33   DD OVMF_SEV_METADATA_VERSION                              ; Version
  34   DD (OvmfSevGuidedStructureEnd - _DescriptorSev - 16) / 12 ; Number of sections
  35
  36 ; SEV-SNP Secrets page
  37 SevSnpSecrets:
  38   DD  SEV_SNP_SECRETS_BASE
  39   DD  SEV_SNP_SECRETS_SIZE
  40   DD  OVMF_SECTION_TYPE_SNP_SECRETS
  41
  42 OvmfSevGuidedStructureEnd:
  43   ALIGN   16