linux-kernel - Re: [PATCH 3/4] KVM: SEV: cleanup locking for KVM_CAP_VM_MOVE_ENC_CONTEXT

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Message-ID: <CAMkAt6o8HUBogtWmXVqzkeoXn9Tfb19yQnhUHb0Rp7bLjA6vkA@mail.gmail.com>
Date:   Wed, 17 Nov 2021 10:47:32 -0700
From:   Peter Gonda <pgonda@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        seanjc@...gle.com
Subject: Re: [PATCH 3/4] KVM: SEV: cleanup locking for KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM

On Wed, Nov 17, 2021 at 9:38 AM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> Encapsulate the handling of the migration_in_progress flag for both VMs in
> two functions sev_lock_two_vms and sev_unlock_two_vms.  It does not matter
> if KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM locks the source struct kvm a bit
> earlier, and this change 1) keeps the cleanup chain of labels smaller 2)
> makes it possible for KVM_CAP_VM_COPY_ENC_CONTEXT_FROM to reuse the logic.
>
> Cc: Peter Gonda <pgonda@...gle.com>
> Cc: Sean Christopherson <seanjc@...gle.com>
> Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>

Acked-by: Peter Gonda <pgonda@...gle.com>

I like the cleanup thanks Paolo.