[RFC 07/10] vdpa-dev: implement the get_config/set_config interface

["Longpeng(Mike)" via <qemu-devel@nongnu.org>]

From: Longpeng <longpeng2@huawei.com>

Implements the .get_config and .set_config interface.

Signed-off-by: Longpeng <longpeng2@huawei.com>
---
 hw/virtio/vdpa-dev.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/hw/virtio/vdpa-dev.c b/hw/virtio/vdpa-dev.c
index 4e4dd3d201..4f97a7521b 100644
--- a/hw/virtio/vdpa-dev.c
+++ b/hw/virtio/vdpa-dev.c
@@ -161,13 +161,23 @@ static void vhost_vdpa_device_unrealize(DeviceState *dev)
 static void
 vhost_vdpa_device_get_config(VirtIODevice *vdev, uint8_t *config)
 {
-    return;
+    VhostVdpaDevice *s = VHOST_VDPA_DEVICE(vdev);
+
+    memcpy(config, s->config, s->config_size);
 }
 
 static void
 vhost_vdpa_device_set_config(VirtIODevice *vdev, const uint8_t *config)
 {
-    return;
+    VhostVdpaDevice *s = VHOST_VDPA_DEVICE(vdev);
+    int ret;
+
+    ret = vhost_dev_set_config(&s->dev, s->config, 0, s->config_size,
+                               VHOST_SET_CONFIG_TYPE_MASTER);
+    if (ret) {
+        error_report("set device config space failed");
+        return;
+    }
 }
 
 static uint64_t vhost_vdpa_device_get_features(VirtIODevice *vdev,
-- 
2.23.0