@@ -354,6 +354,8 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
VirtIOBlockDataPlane *s;
int fd;
Error *local_err = NULL;
+ BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
+ VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
*dataplane = NULL;
@@ -361,6 +363,14 @@ void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
return;
}
+ /* Don't try if transport does not support notifiers. */
+ if (!k->set_guest_notifiers || !k->set_host_notifier) {
+ error_setg(errp,
+ "device is incompatible with x-data-plane "
+ "(transport does not support notifiers)");
+ return;
+ }
+
if (blk->scsi) {
error_setg(errp,
"device is incompatible with x-data-plane, use scsi=off");
If the virtio transport does not support notifiers (like s390-virtio), we can't use dataplane. Bail out early and let the user know what is wrong. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> --- hw/block/dataplane/virtio-blk.c | 10 ++++++++++ 1 file changed, 10 insertions(+)