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vhost-vsock-ccw: force virtio version 1 

virtio-vsock was introduced after the release of VIRTIO 1.0
specifications, so it should be 'modern-only'.

This patch forces virtio version 1 as done for vhost-vsock-pci.

To avoid migration issues, we force virtio version 1 only when
legacy check is enabled in the new machine types (>= 5.1).

Cc: qemu-stable@nongnu.org
Suggested-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20200921122506.82515-5-sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Stefano Garzarella 2020-09-21 14:25:06 +02:00 committed by Michael S. Tsirkin
parent 27eda699f5
commit a6704a34cf
1 changed files with 12 additions and 0 deletions
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12
hw/s390x/vhost-vsock-ccw.c
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@ -40,9 +40,21 @@ static void vhost_vsock_ccw_class_init(ObjectClass *klass, void *data)
static void vhost_vsock_ccw_instance_init(Object *obj)
{
VHostVSockCCWState *dev = VHOST_VSOCK_CCW(obj);
VirtioCcwDevice *ccw_dev = VIRTIO_CCW_DEVICE(obj);
VirtIODevice *virtio_dev;
virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
TYPE_VHOST_VSOCK);
virtio_dev = VIRTIO_DEVICE(&dev->vdev);
/*
* To avoid migration issues, we force virtio version 1 only when
* legacy check is enabled in the new machine types (>= 5.1).
*/
if (!virtio_legacy_check_disabled(virtio_dev)) {
ccw_dev->force_revision_1 = true;
}
}
static const TypeInfo vhost_vsock_ccw_info = {