vhost: handle memory hotplug with vDPA devices

Some vDPA drivers' basic configurations should be updated when the
guest memory is hotplugged.

Close vDPA device before hotplug operation and recreate it after the
hotplug operation is done.

Signed-off-by: Matan Azrad <matan@mellanox.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 4ca8728..d9c421b 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1070,6 +1070,13 @@ vhost_user_set_mem_table(struct virtio_net **pdev, struct VhostUserMsg *msg,
        }
 
        if (dev->mem) {
+               if (dev->flags & VIRTIO_DEV_VDPA_CONFIGURED) {
+                       struct rte_vdpa_device *vdpa_dev = dev->vdpa_dev;
+
+                       if (vdpa_dev && vdpa_dev->ops->dev_close)
+                               vdpa_dev->ops->dev_close(dev->vid);
+                       dev->flags &= ~VIRTIO_DEV_VDPA_CONFIGURED;
+               }
                free_mem_region(dev);
                rte_free(dev->mem);
                dev->mem = NULL;