linux-kernel - Re: [RFC] KVM: x86: Support KVM VMs sharing SEV context

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Message-ID: <b885c283-ceb3-b9bc-516b-c28771652a7c@redhat.com>
Date:   Thu, 25 Feb 2021 21:33:09 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Ashish Kalra <ashish.kalra@....com>,
        James Bottomley <James.Bottomley@...senPartnership.com>
Cc:     natet@...gle.com, brijesh.singh@....com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, rientjes@...gle.com,
        seanjc@...gle.com, srutherford@...gle.com, thomas.lendacky@....com,
        x86@...nel.org, Tobin Feldman-Fitzthum <tobin@....com>,
        DOV MURIK <Dov.Murik1@...ibm.com>
Subject: Re: [RFC] KVM: x86: Support KVM VMs sharing SEV context

On 25/02/21 19:18, Ashish Kalra wrote:
> I do believe that some of these alternative SEV live migration support
> or Migration helper (MH) solutions will still use SEV PSP migration for
> migrating the MH itself, therefore the SEV live migration patches
> (currently v10 posted upstream) still make sense and will be used.

I think that since the migration helper (at least for SEV, not -ES) is 
part of the attested firmware, it can be started on the destination 
before the rest of the VM.

Paolo