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vdpa net: block migration if the device has CVQ

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Devices with CVQ need to migrate state beyond vq state.  Leaving this to
future series.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-11-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eugenio Pérez 2023-03-03 18:24:41 +01:00 committed by Michael S. Tsirkin
parent a230c4712b
commit 9c363cf6d5
3 changed files with 11 additions and 0 deletions
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1
hw/virtio/vhost-vdpa.c
View file

@ -438,6 +438,7 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
v->msg_type = VHOST_IOTLB_MSG_V2;
vhost_vdpa_init_svq(dev, v);
error_propagate(&dev->migration_blocker, v->migration_blocker);
if (!vhost_vdpa_first_dev(dev)) {
return 0;
}

1
include/hw/virtio/vhost-vdpa.h
View file

@ -50,6 +50,7 @@ typedef struct vhost_vdpa {
const VhostShadowVirtqueueOps *shadow_vq_ops;
void *shadow_vq_ops_opaque;
struct vhost_dev *dev;
Error *migration_blocker;
VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX];
} VhostVDPA;

9
net/vhost-vdpa.c
View file

@ -828,6 +828,15 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops;
s->vhost_vdpa.shadow_vq_ops_opaque = s;
/*
* TODO: We cannot migrate devices with CVQ as there is no way to set
* the device state (MAC, MQ, etc) before starting the datapath.
*
* Migration blocker ownership now belongs to s->vhost_vdpa.
*/
error_setg(&s->vhost_vdpa.migration_blocker,
"net vdpa cannot migrate with CVQ feature");
}
ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs);
if (ret) {