Next patches enable devices to be migrated even if vdpa netdev has not
been started with x-svq. However, not all devices are migratable, so we
need to block migration if we detect that.
Block migration if we detect the device expose a feature SVQ does not
know how to work with.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
hw/virtio/vhost-vdpa.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index c01411af30..2de0796e66 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -460,6 +460,15 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_SUSPEND))) {
error_setg(&dev->migration_blocker,
"vhost-vdpa backend lacks VHOST_BACKEND_F_SUSPEND feature.");
+ } else {
+ /* We don't have dev->features yet */
+ uint64_t features;
+ ret = vhost_vdpa_get_dev_features(dev, &features);
+ if (unlikely(ret)) {
+ error_setg_errno(errp, -ret, "Could not get device features");
+ return ret;
+ }
+ vhost_svq_valid_features(features, &dev->migration_blocker);
}
}
--
2.31.1