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This feature flag allows the driver enabling virtqueues both before and after DRIVER_OK. This is needed for software assisted live migration, so userland can restore the device status in devices with control virtqueue before the dataplane is enabled. Signed-off-by: Eugenio Pérez <eperezma@redhat.com> Acked-by: Shannon Nelson <shannon.nelson@amd.com> Message-Id: <20230609092127.170673-2-eperezma@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>