[Qemu-devel] [PATCH 1/4] hw/s390x/virtio-ccw: Add virtio_ccw_device_plugged for virtio-ccw

[Shannon Zhao <shannon.zhao@linaro.org>]

Add virtio_ccw_device_plugged, it can be used to get backend's features.

Signed-off-by: Shannon Zhao <zhaoshenglong@huawei.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
 hw/s390x/virtio-ccw.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index 130535c..30ca377 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -1395,6 +1395,16 @@ static int virtio_ccw_load_config(DeviceState *d, QEMUFile *f)
     return 0;
 }
 
+/* This is called by virtio-bus just after the device is plugged. */
+static void virtio_ccw_device_plugged(DeviceState *d)
+{
+    VirtioCcwDevice *dev = VIRTIO_CCW_DEVICE(d);
+
+    /* Only the first 32 feature bits are used. */
+    dev->host_features[0] = virtio_bus_get_vdev_features(&dev->bus,
+                                                         dev->host_features[0]);
+}
+
 /**************** Virtio-ccw Bus Device Descriptions *******************/
 
 static Property virtio_ccw_net_properties[] = {
@@ -1711,6 +1721,7 @@ static void virtio_ccw_bus_class_init(ObjectClass *klass, void *data)
     k->load_queue = virtio_ccw_load_queue;
     k->save_config = virtio_ccw_save_config;
     k->load_config = virtio_ccw_load_config;
+    k->device_plugged = virtio_ccw_device_plugged;
 }
 
 static const TypeInfo virtio_ccw_bus_info = {
-- 
2.0.4