[edk2-devel] [PATCH 2/6] OvmfPkg: Add Tdx metadata
Min Xu
min.m.xu at intel.com
Mon Jul 12 01:19:38 UTC 2021
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 at amd.com>
Cc: Erdem Aktas <erdemaktas at google.com>
Cc: James Bottomley <jejb at linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Laszlo Ersek <lersek at redhat.com>
Cc: Tom Lendacky <thomas.lendacky at amd.com>
Signed-off-by: Min Xu <min.m.xu at 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
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