Re: [edk2-devel] [PATCH V9 3/4] OvmfPkg: Add IntelTdxMetadata.asm

["Brijesh Singh" <brijesh.singh@amd.com>]

On 10/12/21 12:22 AM, Gerd Hoffmann via groups.io wrote:
>   Hi,
>
>> +; - Type field means this section is of BFV. This field is designed for the
>> +;   purpose that in some case host VMM may do some additional processing based
>> +;   upon the section type. TdHob section is an example. Host VMM pass the
>> +;   physical memory information to the guest firmware by writing the data in
>> +;   the memory region designated by TdHob section.
> Brijesh?  What are your plans?  Do you want use this too?

Based on the previous comment by Jiewen it seems TDX folks want to have
a separate metadata for flexibility. In the v9, I am creating metadata
just for the SEV with a different GUID. Basically same as version 8 but
now the number of descriptors will be smaller (since we focus on SEV-SNP).

thanks 

> If so, then the section types need some more structure.  I think best
> would be reserve blocks, something like 0x00 -> 0xff common types (bfv,
> cfv, temp_mem), 0x100 -> 0x1ff tdx (td_hob), 0x200 -> 0x2ff sev (cpuid,
> secrets, ...).
>
> take care,
>   Gerd
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