virtio-bus: add new functions.

This add two functions:
   * virtio_bus_set_vdev_config.
   * virtio_bus_set_vdev_feature.

Needed by virtio-ccw.
Signed-off-by: NKONRAD Frederic <fred.konrad@greensocs.com>
Message-id: 1366791683-5350-2-git-send-email-fred.konrad@greensocs.com
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/virtio/virtio-bus.c

@@ -124,6 +124,18 @@ uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
     return k->get_features(bus->vdev, requested_features);
 }
 
+/* Set the features of the plugged device. */
+void virtio_bus_set_vdev_features(VirtioBusState *bus,
+                                      uint32_t requested_features)
+{
+    VirtioDeviceClass *k;
+    assert(bus->vdev != NULL);
+    k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+    if (k->set_features != NULL) {
+        k->set_features(bus->vdev, requested_features);
+    }
+}
+
 /* Get bad features of the plugged device. */
 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus)
 {
@@ -148,6 +160,17 @@ void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config)
     }
 }
 
+/* Set config of the plugged device. */
+void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config)
+{
+    VirtioDeviceClass *k;
+    assert(bus->vdev != NULL);
+    k = VIRTIO_DEVICE_GET_CLASS(bus->vdev);
+    if (k->set_config != NULL) {
+        k->set_config(bus->vdev, config);
+    }
+}
+
 static const TypeInfo virtio_bus_info = {
     .name = TYPE_VIRTIO_BUS,
     .parent = TYPE_BUS,

include/hw/virtio/virtio-bus.h

@@ -86,9 +86,14 @@ size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus);
 /* Get the features of the plugged device. */
 uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
                                     uint32_t requested_features);
+/* Set the features of the plugged device. */
+void virtio_bus_set_vdev_features(VirtioBusState *bus,
+                                  uint32_t requested_features);
 /* Get bad features of the plugged device. */
 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
 /* Get config of the plugged device. */
 void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config);
+/* Set config of the plugged device. */
+void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config);
 
 #endif /* VIRTIO_BUS_H */