On 30/03/2022 8:20, Gerd Hoffmann wrote:
> Hi,
>
>> Check if that page is defined; if it is, skip it in the metadata list.
>> In such case, VMM should fill the page with the hashes content, or
>> explicitly update it as a zero page (if kernel hashes are not used).
>
> Is it an option to just skip the page unconditionally?
>
> I think in the OvmfPkgX64 build the page is not used, so it probably
> doesn't matter whenever it is included or not, and it would make things
> a bit less confusing ...
>
Brijesh,
What would happen if we change this:
%define SNP_SEC_MEM_BASE_DESC_3 (CPUID_BASE + CPUID_SIZE)
to:
%define SNP_SEC_MEM_BASE_DESC_3 (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase))
in OvmfPkg/ResetVector/ResetVector.nasmb ?
It means that the page starting at MEMFD_BASE_ADDRESS+0x00F000 (that is, the
page
that follows the SNP CPUID page) will not be pre-validated by QEMU.
I'm not sure what are the implications.
-Dov
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