Re: [RFC 06/16] KVM: selftests: add library for creating/interacting with SEV guests

[Mingwei Zhang]

>
> >
> > > +#define SEV_FW_REQ_VER_MAJOR   1
> > > +#define SEV_FW_REQ_VER_MINOR   30
> >
> > Where does the requirement for this minimum version come from? Maybe
> > add a comment?
> >
> > Edit: Is this for patches later on in the series that exercise SNP? If
> > so, I think it would be better to add a check like this in the test
> > itself, rather than globally. I happened to test this on a machine
> > with a very old PSP FW, 0.22, and the SEV test added in patch #7 seems
> > to work fine with this ancient PSP FW.
>
> Ah, yes, this was mostly for SNP support. I'll implement a separate minimum
> version for SEV/SEV-ES.
>

I want to ask the same thing, I tried to run the sev selftest today
and I was blocked by this minimum version number... BTW: I suspect if
I want to update the SEV firmware I have to update the BIOS myself?
So, it would be good to know what is the actual minimum for SEV.

In addition, maybe that's side effect, I see a warning when building the kernel:

"module ccp.ko requires firmware amd/amd_sev_fam19h_model0xh.sbin"

Maybe I need some hints from you? Or maybe it is just harmless. I did
double checked and it looks like I was using either
amd_sev_fam17h_model3xh.sbin or amd_sev_fam17h_model0xh.sbin

Thanks.
-Mingwei