fridtjof/qemu-cr16
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

vdpa: set backend capabilities at vhost_vdpa_init

Browse source 
The backend does not reset them until the vdpa file descriptor is closed
so there is no harm in doing it only once.

This allows the destination of a live migration to premap memory in
batches, using VHOST_BACKEND_F_IOTLB_BATCH.

Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20250522145839.59974-4-jonah.palmer@oracle.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 2025-05-22 10:58:35 -04:00 • committed by Michael S. Tsirkin
parent 3312e6c8c9
commit 32f0c7ce4c
1 changed files with 6 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

7
hw/virtio/vhost-vdpa.c
View file

@ -634,6 +634,12 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
v->dev = dev;
dev->opaque = opaque ;
v->shared->listener = vhost_vdpa_memory_listener;
ret = vhost_vdpa_set_backend_cap(dev);
if (unlikely(ret != 0)) {
return ret;
}
vhost_vdpa_init_svq(dev, v);
error_propagate(&dev->migration_blocker, v->migration_blocker);
@ -1563,7 +1569,6 @@ const VhostOps vdpa_ops = {
.vhost_set_vring_kick = vhost_vdpa_set_vring_kick,
.vhost_set_vring_call = vhost_vdpa_set_vring_call,
.vhost_get_features = vhost_vdpa_get_features,
.vhost_set_backend_cap = vhost_vdpa_set_backend_cap,
.vhost_set_owner = vhost_vdpa_set_owner,
.vhost_set_vring_endian = NULL,
.vhost_backend_memslots_limit = vhost_vdpa_memslots_limit,