From: Steve Rutherford <srutherford@google.com>
To: jejb@linux.ibm.com
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Ashish Kalra <ashish.kalra@amd.com>,
Nathan Tempelman <natet@google.com>,
Tom Lendacky <thomas.lendacky@amd.com>, X86 ML <x86@kernel.org>,
KVM list <kvm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Sean Christopherson <seanjc@google.com>,
David Rientjes <rientjes@google.com>,
Brijesh Singh <brijesh.singh@amd.com>,
dovmurik@linux.vnet.ibm.com, lersek@redhat.com,
frankeh@us.ibm.com
Subject: Re: [RFC v2] KVM: x86: Support KVM VMs sharing SEV context
Date: Thu, 8 Apr 2021 12:48:56 -0700 [thread overview]
Message-ID: <CABayD+cBdOMzy7g6X4W-M8ssMpbpDGxFA5o-Nc5CmWi-aeCArQ@mail.gmail.com> (raw)
In-Reply-To: <936fa1e7755687981bdbc3bad9ecf2354c748381.camel@linux.ibm.com>
On Thu, Apr 8, 2021 at 10:43 AM James Bottomley <jejb@linux.ibm.com> wrote:
>
> On Fri, 2021-04-02 at 16:20 +0200, Paolo Bonzini wrote:
> > On 02/04/21 13:58, Ashish Kalra wrote:
> > > Hi Nathan,
> > >
> > > Will you be posting a corresponding Qemu patch for this ?
> >
> > Hi Ashish,
> >
> > as far as I know IBM is working on QEMU patches for guest-based
> > migration helpers.
>
> Yes, that's right, we'll take on this part.
>
> > However, it would be nice to collaborate on the low-level (SEC/PEI)
> > firmware patches to detect whether a CPU is part of the primary VM
> > or the mirror. If Google has any OVMF patches already done for that,
> > it would be great to combine it with IBM's SEV migration code and
> > merge it into upstream OVMF.
>
> We've reached the stage with our prototyping where not having the OVMF
> support is blocking us from working on QEMU. If we're going to have to
> reinvent the wheel in OVMF because Google is unwilling to publish the
> patches, can you at least give some hints about how you did it?
>
> Thanks,
>
> James
Hey James,
It's not strictly necessary to modify OVMF to make SEV VMs live
migrate. If we were to modify OVMF, we would contribute those changes
upstream.
Thanks,
Steve
next prev parent reply other threads:[~2021-04-08 19:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 1:40 [RFC v2] KVM: x86: Support KVM VMs sharing SEV context Nathan Tempelman
2021-04-02 11:58 ` Ashish Kalra
2021-04-02 14:20 ` Paolo Bonzini
2021-04-08 17:43 ` James Bottomley
2021-04-08 19:48 ` Steve Rutherford [this message]
2021-04-08 21:15 ` James Bottomley
2021-04-09 0:41 ` Steve Rutherford
2021-04-09 1:18 ` James Bottomley
2021-04-09 8:14 ` Paolo Bonzini
2021-04-09 20:24 ` Steve Rutherford
2021-04-02 14:25 ` Paolo Bonzini
2021-04-02 18:17 ` Sean Christopherson
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