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Re: [PATCH v3] s390x/cpu_model: disallow unpack for --only-migratable

From: Halil Pasic
Subject: Re: [PATCH v3] s390x/cpu_model: disallow unpack for --only-migratable
Date: Mon, 25 Jan 2021 23:49:24 +0100

On Mon, 25 Jan 2021 14:53:32 +0100
Christian Borntraeger <borntraeger@de.ibm.com> wrote:

> Secure execution (aka protected virtualization) guests cannot be
> migrated at the moment. If the unpack facility is provided in the cpu
> model, a guest may choose to transition to secure mode, making the
> guest unmigratable at that point in time. If the machine was explicitly
> started with --only-migratable, we would get a failure only when the
> guest actually tries to transition; instead, explicitly disallow the
> unpack facility if --only-migratable was specified to avoid late
> surprises.
> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Reviewed-by: David Hildenbrand <david@redhat.com>

Reviewed-by: Halil Pasic <pasic@linux.ibm.com>

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