+ if (dev->ops->send_request(dev, VHOST_USER_GET_FEATURES,
+ &dev->device_features) < 0) {
+ PMD_INIT_LOG(ERR, "get_features failed: %s",
+ strerror(errno));
+ return -1;
+ }
+
+ features &= ~dev->device_features;
+ /* For following bits, vhost-user doesn't really need to know */
+ features &= ~(1ull << VIRTIO_NET_F_MAC);
+ features &= ~(1ull << VIRTIO_NET_F_CTRL_VLAN);
+ features &= ~(1ull << VIRTIO_NET_F_CTRL_MAC_ADDR);
+ features &= ~(1ull << VIRTIO_NET_F_STATUS);
+ if (features)
+ PMD_INIT_LOG(ERR, "WARNING: Some features 0x%" PRIx64 " are not supported by vhost-user!",
+ features);
+
+ dev->features &= dev->device_features;
+