linux-kernel - Re: [PATCH v4 5/5] x86/kvm: Add guest support for detecting and enabling SEV Live Migration feature.

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Message-ID: <CABayD+e2n+7YB5a9he2VKLKSA80kXVteBMFQgtTG2-oNqqPDYA@mail.gmail.com>
Date:   Mon, 28 Jun 2021 13:37:46 -0700
From:   Steve Rutherford <srutherford@...gle.com>
To:     Ashish Kalra <Ashish.Kalra@....com>
Cc:     Borislav Petkov <bp@...en8.de>, pbonzini@...hat.com,
        seanjc@...gle.com, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, joro@...tes.org, thomas.lendacky@....com,
        x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        brijesh.singh@....com
Subject: Re: [PATCH v4 5/5] x86/kvm: Add guest support for detecting and
 enabling SEV Live Migration feature.

On Mon, Jun 28, 2021 at 12:34 PM Ashish Kalra <ashish.kalra@....com> wrote:
>
> Hello Steve,
>
> Do you have any final thoughts on this ?

Hi Ashish,

Don't block this because of my lack of understanding.  I'm still
curious about the interactions between SEV and kexec
--preserved-state. If you have concerns about --preserved-state
breaking live-migration (when returning to the original kernel), you
could have kexec's with that flag return an error on Live Migratable
SEV kernels.

Thanks,
Steve