Commit c255488d67 "virtio: add vhost support for virtio devices"
added the get_vhost() function, but it did not include vhost-vdpa devices.

So when I use the vdpa device and query the status of the vdpa device
with the x-query-virtio-status qmp command, since vdpa does not implement
vhost_get, it will cause qemu to crash.

Therefore, in order to obtain the status of the virtio device under vhost-vdpa,
we need to add a vhost_get implement for the vdpa device.

Co-developed-by: Miao Kezhan <miaokezhan@baidu.com>
Signed-off-by: Miao Kezhan <miaokezhan@baidu.com>
Signed-off-by: Li Zhaoxin <lizhaoxin04@baidu.com>
---
 hw/virtio/vdpa-dev.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/hw/virtio/vdpa-dev.c b/hw/virtio/vdpa-dev.c
index d1da40afc8..4a7b970976 100644
--- a/hw/virtio/vdpa-dev.c
+++ b/hw/virtio/vdpa-dev.c
@@ -338,6 +338,12 @@ static int vhost_vdpa_device_set_status(VirtIODevice *vdev, uint8_t status)
     return 0;
 }
 
+static struct vhost_dev *vhost_vdpa_device_get_vhost(VirtIODevice *vdev)
+{
+    VhostVdpaDevice *s = VHOST_VDPA_DEVICE(vdev);
+    return &s->dev;
+}
+
 static const Property vhost_vdpa_device_properties[] = {
     DEFINE_PROP_STRING("vhostdev", VhostVdpaDevice, vhostdev),
     DEFINE_PROP_UINT16("queue-size", VhostVdpaDevice, queue_size, 0),
@@ -369,6 +375,7 @@ static void vhost_vdpa_device_class_init(ObjectClass *klass, const void *data)
     vdc->set_config = vhost_vdpa_device_set_config;
     vdc->get_features = vhost_vdpa_device_get_features;
     vdc->set_status = vhost_vdpa_device_set_status;
+    vdc->get_vhost = vhost_vdpa_device_get_vhost;
 }
 
 static void vhost_vdpa_device_instance_init(Object *obj)
-- 
2.34.1