[PATCH 2/6] OvmfPkg: Add Tdx metadata

["Min Xu" <min.m.xu@intel.com>]

RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429

Tdx Metadata describes the information about the image for VMM use.
For example, the base address and length of the TdHob, TdMailbox, etc.
Its offset is put in a GUID-ed structure which is appended in the GUID-ed
chain from a fixed GPA (0xffffffd0). Below are the items in TdxMetadata:
 _Bfv:
    Boot Firmware Volume
 _Cfv:
    Configuration Firmware Volume
 _Stack:
    Initial stack
 _Heap:
    Initial heap
 _MailBox:
    TDVF reserves the memory region so each AP can receive the message
    sent by the guest OS.
 _TdHob:
    VMM pass the resource information in TdHob to TDVF.
 _TdxPageTable:
    If 5-level page table is supported (GPAW is 52), a top level page
    directory pointers (1 * 256TB entry) is generated in this page.
 _OvmfPageTable:
    Initial page table for standard Ovmf.

TDVF indicate above chunk of temporary initialized memory region (_Stack/
_Heap/_MailBox/_TdHob/_TdxPageTables/OvmfPageTable) to support TDVF code
finishing the memory initialization. Because the other unaccepted memory
cannot be accessed until they're accepted.

Since AMD SEV has already defined some SEV specific memory region in
MEMFD. SEV and TDX will not run at the same time. So TDX re-use the
memory region defined by SEV.
 - MailBox      : PcdOvmfSecGhcbBackupBase|PcdOvmfSecGhcbBackupSize
 - TdHob        : PcdOvmfSecGhcbBase|PcdOvmfSecGhcbSize
 - TdxPageTable : PcdOvmfSecGhcbPageTableBase|PcdOvmfSecGhcbPageTableSize

Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
---
 OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm | 17 ++++
 OvmfPkg/ResetVector/ResetVector.inf          | 11 ++-
 OvmfPkg/ResetVector/ResetVector.nasmb        | 47 +++++++++-
 OvmfPkg/ResetVector/X64/TdxMetadata.asm      | 97 ++++++++++++++++++++
 4 files changed, 169 insertions(+), 3 deletions(-)
 create mode 100644 OvmfPkg/ResetVector/X64/TdxMetadata.asm

diff --git a/OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm b/OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm
index 9c0b5853a46f..ac86ce69ebe8 100644
--- a/OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm
+++ b/OvmfPkg/ResetVector/Ia16/ResetVectorVtf0.asm
@@ -47,6 +47,23 @@ TIMES (15 - ((guidedStructureEnd - guidedStructureStart + 15) % 16)) DB 0
 ;
 guidedStructureStart:
 
+%ifdef ARCH_X64
+;
+; TDX Metadata offset block
+;
+; If TdxMetadata.asm is included then we need below block which describes
+; the offset of TdxMetadata block in Ovmf image
+;
+; GUID : e47a6535-984a-4798-865e-4685a7bf8ec2
+;
+tdxMetadataOffsetStart:
+    DD      (OVMF_IMAGE_SIZE_IN_KB * 1024 - (fourGigabytes - TdxMetadataGuid - 16))
+    DD      tdxMetadataOffsetEnd - tdxMetadataOffsetStart
+    DB      0x35, 0x65, 0x7a, 0xe4, 0x4a, 0x98, 0x98, 0x47
+    DB      0x86, 0x5e, 0x46, 0x85, 0xa7, 0xbf, 0x8e, 0xc2
+tdxMetadataOffsetEnd:
+
+%endif
 ;
 ; SEV Secret block
 ;
diff --git a/OvmfPkg/ResetVector/ResetVector.inf b/OvmfPkg/ResetVector/ResetVector.inf
index dc38f68919cd..fd65c0c9621d 100644
--- a/OvmfPkg/ResetVector/ResetVector.inf
+++ b/OvmfPkg/ResetVector/ResetVector.inf
@@ -1,7 +1,7 @@
 ## @file
 #  Reset Vector
 #
-#  Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -43,6 +43,15 @@
   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesSize
   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamBase
   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamSize
+  gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecGhcbBackupBase
+  gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecGhcbBackupSize
+  gUefiOvmfPkgTokenSpaceGuid.PcdOvmfImageSizeInKb
+  gUefiOvmfPkgTokenSpaceGuid.PcdCfvBase
+  gUefiOvmfPkgTokenSpaceGuid.PcdCfvRawDataOffset
+  gUefiOvmfPkgTokenSpaceGuid.PcdCfvRawDataSize
+  gUefiOvmfPkgTokenSpaceGuid.PcdBfvBase
+  gUefiOvmfPkgTokenSpaceGuid.PcdBfvRawDataOffset
+  gUefiOvmfPkgTokenSpaceGuid.PcdBfvRawDataSize
 
 [FixedPcd]
   gUefiOvmfPkgTokenSpaceGuid.PcdSevLaunchSecretBase
diff --git a/OvmfPkg/ResetVector/ResetVector.nasmb b/OvmfPkg/ResetVector/ResetVector.nasmb
index 5fbacaed5f9d..b653fe87abd6 100644
--- a/OvmfPkg/ResetVector/ResetVector.nasmb
+++ b/OvmfPkg/ResetVector/ResetVector.nasmb
@@ -4,6 +4,7 @@
 ;
 ; Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>
 ; Copyright (c) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
+; Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
 ; SPDX-License-Identifier: BSD-2-Clause-Patent
 ;
 ;------------------------------------------------------------------------------
@@ -67,6 +68,44 @@
     %error "This implementation inherently depends on PcdOvmfSecGhcbBase not straddling a 2MB boundary"
   %endif
 
+  ;
+  ; TDX meta data
+  ;
+  %define TDX_METADATA_SECTION_TYPE_BFV       0
+  %define TDX_METADATA_SECTION_TYPE_CFV       1
+  %define TDX_METADATA_SECTION_TYPE_TD_HOB    2
+  %define TDX_METADATA_SECTION_TYPE_TEMP_MEM  3
+  %define TDX_METADATA_VERSION                1
+  %define TDX_METADATA_ATTRIBUTES_EXTENDMR    0x00000001
+
+  %define TDX_BFV_RAW_DATA_OFFSET   FixedPcdGet32 (PcdBfvRawDataOffset)
+  %define TDX_BFV_RAW_DATA_SIZE     FixedPcdGet32 (PcdBfvRawDataSize)
+  %define TDX_BFV_MEMORY_BASE       FixedPcdGet32 (PcdBfvBase)
+  %define TDX_BFV_MEMORY_SIZE       FixedPcdGet32 (PcdBfvRawDataSize)
+
+  %define TDX_CFV_RAW_DATA_OFFSET   FixedPcdGet32 (PcdCfvRawDataOffset)
+  %define TDX_CFV_RAW_DATA_SIZE     FixedPcdGet32 (PcdCfvRawDataSize)
+  %define TDX_CFV_MEMORY_BASE       FixedPcdGet32 (PcdCfvBase),
+  %define TDX_CFV_MEMORY_SIZE       FixedPcdGet32 (PcdCfvRawDataSize),
+
+  %define TDX_HEAP_MEMORY_BASE      FixedPcdGet32 (PcdOvmfSecPeiTempRamBase)
+  %define TDX_HEAP_MEMORY_SIZE      FixedPcdGet32 (PcdOvmfSecPeiTempRamSize) / 2
+
+  %define TDX_STACK_MEMORY_BASE     (TDX_HEAP_MEMORY_BASE + TDX_HEAP_MEMORY_SIZE)
+  %define TDX_STACK_MEMORY_SIZE     FixedPcdGet32 (PcdOvmfSecPeiTempRamSize) / 2
+
+  %define TDX_HOB_MEMORY_BASE       FixedPcdGet32 (PcdOvmfSecGhcbBase)
+  %define TDX_HOB_MEMORY_SIZE       FixedPcdGet32 (PcdOvmfSecGhcbSize)
+
+  %define TDX_MAILBOX_MEMORY_BASE   FixedPcdGet32 (PcdOvmfSecGhcbBackupBase)
+  %define TDX_MAILBOX_MEMORY_SIZE   FixedPcdGet32 (PcdOvmfSecGhcbBackupSize)
+
+  %define OVMF_PAGE_TABLE_BASE      FixedPcdGet32 (PcdOvmfSecPageTablesBase)
+  %define OVMF_PAGE_TABLE_SIZE      FixedPcdGet32 (PcdOvmfSecPageTablesSize)
+
+  %define TDX_EXTRA_PAGE_TABLE_BASE FixedPcdGet32 (PcdOvmfSecGhcbPageTableBase)
+  %define TDX_EXTRA_PAGE_TABLE_SIZE FixedPcdGet32 (PcdOvmfSecGhcbPageTableSize)
+
   %define PT_ADDR(Offset) (FixedPcdGet32 (PcdOvmfSecPageTablesBase) + (Offset))
 
   %define GHCB_PT_ADDR (FixedPcdGet32 (PcdOvmfSecGhcbPageTableBase))
@@ -76,8 +115,11 @@
   %define SEV_ES_WORK_AREA_RDRAND (FixedPcdGet32 (PcdSevEsWorkAreaBase) + 8)
   %define SEV_ES_WORK_AREA_ENC_MASK (FixedPcdGet32 (PcdSevEsWorkAreaBase) + 16)
   %define SEV_ES_VC_TOP_OF_STACK (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
-%include "Ia32/Flat32ToFlat64.asm"
-%include "Ia32/PageTables64.asm"
+
+  %include "X64/TdxMetadata.asm"
+
+  %include "Ia32/Flat32ToFlat64.asm"
+  %include "Ia32/PageTables64.asm"
 %endif
 
 %include "Ia16/Real16ToFlat32.asm"
@@ -88,5 +130,6 @@
   %define SEV_ES_AP_RESET_IP  FixedPcdGet32 (PcdSevEsWorkAreaBase)
   %define SEV_LAUNCH_SECRET_BASE  FixedPcdGet32 (PcdSevLaunchSecretBase)
   %define SEV_LAUNCH_SECRET_SIZE  FixedPcdGet32 (PcdSevLaunchSecretSize)
+  %define OVMF_IMAGE_SIZE_IN_KB   FixedPcdGet32 (PcdOvmfImageSizeInKb)
 %include "Ia16/ResetVectorVtf0.asm"
 
diff --git a/OvmfPkg/ResetVector/X64/TdxMetadata.asm b/OvmfPkg/ResetVector/X64/TdxMetadata.asm
new file mode 100644
index 000000000000..8dba8daa0165
--- /dev/null
+++ b/OvmfPkg/ResetVector/X64/TdxMetadata.asm
@@ -0,0 +1,97 @@
+;------------------------------------------------------------------------------
+; @file
+; Tdx Virtual Firmware metadata
+;
+; Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;------------------------------------------------------------------------------
+
+BITS    64
+
+%define TDX_VIRTUAL_FIRMWARE
+
+ALIGN   16
+TIMES (15 - ((TdxGuidedStructureEnd - TdxGuidedStructureStart + 15) % 16)) DB 0
+
+TdxGuidedStructureStart:
+
+;
+; TDVF meta data
+;
+TdxMetadataGuid:
+  DB  0xf3, 0xf9, 0xea, 0xe9, 0x8e, 0x16, 0xd5, 0x44
+  DB  0xa8, 0xeb, 0x7f, 0x4d, 0x87, 0x38, 0xf6, 0xae
+
+_Descriptor:
+  DB 'T','D','V','F'                                  ; Signature
+  DD TdxGuidedStructureEnd - _Descriptor              ; Length
+  DD TDX_METADATA_VERSION                             ; Version
+  DD (TdxGuidedStructureEnd - _Descriptor - 16)/32    ; Number of sections
+
+_Bfv:
+  DD TDX_BFV_RAW_DATA_OFFSET
+  DD TDX_BFV_RAW_DATA_SIZE
+  DQ TDX_BFV_MEMORY_BASE
+  DQ TDX_BFV_MEMORY_SIZE
+  DD TDX_METADATA_SECTION_TYPE_BFV
+  DD TDX_METADATA_ATTRIBUTES_EXTENDMR
+
+_Cfv:
+  DD TDX_CFV_RAW_DATA_OFFSET
+  DD TDX_CFV_RAW_DATA_SIZE
+  DQ TDX_CFV_MEMORY_BASE
+  DQ TDX_CFV_MEMORY_SIZE
+  DD TDX_METADATA_SECTION_TYPE_CFV
+  DD 0
+
+_Stack:
+  DD 0
+  DD 0
+  DQ TDX_STACK_MEMORY_BASE
+  DQ TDX_STACK_MEMORY_SIZE
+  DD TDX_METADATA_SECTION_TYPE_TEMP_MEM
+  DD 0
+
+_Heap:
+  DD 0
+  DD 0
+  DQ TDX_HEAP_MEMORY_BASE
+  DQ TDX_HEAP_MEMORY_SIZE
+  DD TDX_METADATA_SECTION_TYPE_TEMP_MEM
+  DD 0
+
+_MailBox:
+  DD 0
+  DD 0
+  DQ TDX_MAILBOX_MEMORY_BASE
+  DQ TDX_MAILBOX_MEMORY_SIZE
+  DD TDX_METADATA_SECTION_TYPE_TEMP_MEM
+  DD 0
+
+_TdHob:
+  DD 0
+  DD 0
+  DQ TDX_HOB_MEMORY_BASE
+  DQ TDX_HOB_MEMORY_SIZE
+  DD TDX_METADATA_SECTION_TYPE_TD_HOB
+  DD 0
+
+_TdxPageTable:
+  DD 0
+  DD 0
+  DQ TDX_EXTRA_PAGE_TABLE_BASE
+  DQ TDX_EXTRA_PAGE_TABLE_SIZE
+  DD TDX_METADATA_SECTION_TYPE_TEMP_MEM
+  DD 0
+
+_OvmfPageTable:
+  DD 0
+  DD 0
+  DQ OVMF_PAGE_TABLE_BASE
+  DQ OVMF_PAGE_TABLE_SIZE
+  DD TDX_METADATA_SECTION_TYPE_TEMP_MEM
+  DD 0
+
+TdxGuidedStructureEnd:
+ALIGN   16
-- 
2.29.2.windows.2