[Qemu-devel] [PATCH V3 2/3] hw/vhost-user: sync backend features

[Marcel Apfelbaum <marcel@redhat.com>]

Complete vhost-user negotiation by synching the features
supported by the backend.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
---
 hw/virtio/vhost-user.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
index c4428a1..b522437 100644
--- a/hw/virtio/vhost-user.c
+++ b/hw/virtio/vhost-user.c
@@ -22,6 +22,7 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <linux/vhost.h>
+#include <linux/virtio_net.h>
 
 #define VHOST_MEMORY_MAX_NREGIONS    8
 
@@ -358,6 +359,22 @@ static int vhost_user_init(struct vhost_dev *dev, void *opaque)
         return err;
     }
 
+    if (__virtio_has_feature(msg.u64, VIRTIO_F_ANY_LAYOUT)) {
+        dev->backend_features |= 1ULL << VIRTIO_F_ANY_LAYOUT;
+    }
+
+    if (__virtio_has_feature(msg.u64, VIRTIO_F_VERSION_1)) {
+        dev->backend_features |= 1ULL << VIRTIO_F_VERSION_1;
+    }
+
+    if (__virtio_has_feature(msg.u64, VIRTIO_NET_F_MRG_RXBUF)) {
+        dev->backend_features |= 1ULL << VIRTIO_NET_F_MRG_RXBUF;
+    }
+
+    if (__virtio_has_feature(msg.u64, VIRTIO_NET_F_MQ)) {
+        dev->backend_features |= 1ULL << VIRTIO_NET_F_MQ;
+    }
+
     if (__virtio_has_feature(msg.u64, VHOST_USER_F_PROTOCOL_FEATURES)) {
         dev->backend_features |= 1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
 
-- 
2.1.0