virtio: move host_features

Move host_features from the individual transport proxies into
the virtio device. Transports may continue to add feature bits
during device plugging.

This should it make easier to offer different sets of host features
for virtio-1/transitional support.

Tested-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 5 insertions, 13 deletions

diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c
index be886e75af..fac452bd1d 100644
--- a/hw/virtio/virtio-bus.c
+++ b/hw/virtio/virtio-bus.c
@@ -44,12 +44,17 @@ int virtio_bus_device_plugged(VirtIODevice *vdev)
     BusState *qbus = BUS(qdev_get_parent_bus(qdev));
     VirtioBusState *bus = VIRTIO_BUS(qbus);
     VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
+    VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
+
     DPRINTF("%s: plug device.\n", qbus->name);
 
     if (klass->device_plugged != NULL) {
         klass->device_plugged(qbus->parent);
     }
 
+    /* Get the features of the plugged device. */
+    assert(vdc->get_features != NULL);
+    vdev->host_features = vdc->get_features(vdev, vdev->host_features);
     return 0;
 }
 
@@ -96,19 +101,6 @@ size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus)
     return vdev->config_len;
 }
 
-/* Get the features of the plugged device. */
-uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
-                                    uint32_t requested_features)
-{
-    VirtIODevice *vdev = virtio_bus_get_device(bus);
-    VirtioDeviceClass *k;
-
-    assert(vdev != NULL);
-    k = VIRTIO_DEVICE_GET_CLASS(vdev);
-    assert(k->get_features != NULL);
-    return k->get_features(vdev, requested_features);
-}
-
 /* Get bad features of the plugged device. */
 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus)
 {