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Date: Wed, 29 Mar 2017 17:32:53 +0200
From: Borislav Petkov <bp@suse.de>
To: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [RFC PATCH v2 16/32] x86: kvm: Provide support to create Guest
 and HV shared per-CPU variables
Message-ID: <20170329153252.kwwyedndwnfgvzcb@pd.tnic>
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On Wed, Mar 29, 2017 at 05:21:13PM +0200, Paolo Bonzini wrote:
> The GHCB would have to be allocated much earlier, possibly even by
> firmware depending on how things will be designed.

How about a statically allocated page like we do with the early
pagetable pages in head_64.S?

> I think it's premature to consider SEV-ES requirements.

My only concern is not to have to redo a lot when SEV-ES gets enabled.
So it would be prudent to design with SEV-ES in the back of our minds.

-- 
Regards/Gruss,
    Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
--