Re: [PATCH 6/7] x86/boot/compressed/64: Check SEV encryption in 32-bit boot-path

[Joerg Roedel]

On Tue, Mar 02, 2021 at 08:43:53PM +0100, Borislav Petkov wrote:
> On Wed, Feb 10, 2021 at 11:21:34AM +0100, Joerg Roedel wrote:
> > +	/*
> > +	 * Store the sme_me_mask as an indicator that SEV is active. It will be
> > +	 * set again in startup_64().
> 
> So why bother? Or does something needs it before that?

This was actually a bug. The startup32_check_sev_cbit() needs something
to skip the check when SEV is not active. Therefore the value is set
here in sme_me_mask, but the function later checks sev_status.

I fixed it by setting sev_status to 1 here (indicates SEV is active).

Regards,

	Joerg