[AMD Official Use Only] May I ask to use the OvmfMetadata instead of the of TdxMetadata for the Guided structure name label (same as what I did in SNP series patch #4). If you can send the metadata introduction as a patch separately then add the TDX descriptor in TDX series. I can try to make it work for the SNP series and add SNP specific descriptors. Additionally, I think you want to provide an absolute offset for the start of the metadata instead relative value so that VMM can very easily reach to the start of metadata. e.g
+OvmfMetadataOffsetStart: + DD (fourGigabytes - OvmfMetadataGuid - 16) + DW OvmfMetadataOffsetEnd - OvmfMetadataOffsetStart + DB 0x35, 0x65, 0x7a, 0xe4, 0x4a, 0x98, 0x98, 0x47 + DB 0x86, 0x5e, 0x46, 0x85, 0xa7, 0xbf, 0x8e, 0xc2 +OvmfMetadataOffsetEnd: For SNP series, I will 3 section types #1 CPUID, # Secrets, and #3 SEC_MEM and will probably add a total of 3 more descriptors. ________________________________ From: Xu, Min M <min.m...@intel.com> Sent: Tuesday, September 28, 2021 2:35 AM To: devel@edk2.groups.io <devel@edk2.groups.io>; kra...@redhat.com <kra...@redhat.com> Cc: Yao, Jiewen <jiewen....@intel.com>; Ard Biesheuvel <ardb+tianoc...@kernel.org>; Justen, Jordan L <jordan.l.jus...@intel.com>; Singh, Brijesh <brijesh.si...@amd.com>; Erdem Aktas <erdemak...@google.com>; James Bottomley <j...@linux.ibm.com>; Lendacky, Thomas <thomas.lenda...@amd.com> Subject: RE: [edk2-devel] [PATCH V8 3/3] OvmfPkg: Enable TDX in ResetVector On September 28, 2021 12:43 PM, Gerd Hoffmann wrote: > Hi, > > > > Can you move the metadata changes to a separate patch please? > > Yes, the metadata changes will be in a separate patch in the next version. > > Can you also add a comment block documenting the format? Not only those > parts which are used for TDVF, but everything? The description in > tdx-virtual- > firmware-design-guide-rev-1.pdf seems to be incomplete, specifically the > option to use the table for TD memory allocation (as mentioned by Jiewen) is > not covered. And possibly there is more which is missing ... Sure. I will add the comment in IntelTdxMetadata.asm to describe the format of Tdx Metadata. Here is the PR I would send as the next version. https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Ftianocore%2Fedk2%2Fpull%2F2018&data=04%7C01%7Cbrijesh.singh%40amd.com%7Cf49ea5bc7d79474e572108d982529cbd%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637684113590273535%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=bGOxYMIKtHYKhcfk0Wt4qoIgiz3b9DM%2FAD%2Fui3ByVrU%3D&reserved=0 You can have a preliminary review if you want. > > thanks, > Gerd > > > > > -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#81223): https://edk2.groups.io/g/devel/message/81223 Mute This Topic: https://groups.io/mt/85891884/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
