From: Akihiko Odaki <akihiko.odaki@daynix.com>

VIRTIO_NET_F_RSC_EXT is implemented in the rx data path, which vhost
implements, so vhost needs to support the feature if it is ever to be
enabled with vhost. The feature must be disabled otherwise.

Fixes: 2974e916df87 ("virtio-net: support RSC v4/v6 tcp traffic for Windows HCK")
Reported-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20240802-rsc-v1-1-2b607bd2f555@daynix.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/net/vhost_net.c | 2 ++
 net/vhost-vdpa.c   | 1 +
 2 files changed, 3 insertions(+)

diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index a788e6937e..dedf9ad7c2 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -50,6 +50,7 @@ static const int kernel_feature_bits[] = {
     VIRTIO_F_RING_RESET,
     VIRTIO_F_IN_ORDER,
     VIRTIO_F_NOTIFICATION_DATA,
+    VIRTIO_NET_F_RSC_EXT,
     VIRTIO_NET_F_HASH_REPORT,
     VHOST_INVALID_FEATURE_BIT
 };
@@ -81,6 +82,7 @@ static const int user_feature_bits[] = {
     VIRTIO_F_RING_RESET,
     VIRTIO_F_IN_ORDER,
     VIRTIO_NET_F_RSS,
+    VIRTIO_NET_F_RSC_EXT,
     VIRTIO_NET_F_HASH_REPORT,
     VIRTIO_NET_F_GUEST_USO4,
     VIRTIO_NET_F_GUEST_USO6,
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 03457ead66..46b02c50be 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -88,6 +88,7 @@ const int vdpa_feature_bits[] = {
     VIRTIO_NET_F_MQ,
     VIRTIO_NET_F_MRG_RXBUF,
     VIRTIO_NET_F_MTU,
+    VIRTIO_NET_F_RSC_EXT,
     VIRTIO_NET_F_RSS,
     VIRTIO_NET_F_STATUS,
     VIRTIO_RING_F_EVENT_IDX,
-- 
MST