@@ -149,6 +149,11 @@ static uint32_t virtio_net_get_features(VirtIODevice *vdev)
features |= (1 << VIRTIO_NET_F_HOST_TSO4);
features |= (1 << VIRTIO_NET_F_HOST_TSO6);
features |= (1 << VIRTIO_NET_F_HOST_ECN);
+
+ features |= (1 << VIRTIO_NET_F_GUEST_CSUM);
+ features |= (1 << VIRTIO_NET_F_GUEST_TSO4);
+ features |= (1 << VIRTIO_NET_F_GUEST_TSO6);
+ features |= (1 << VIRTIO_NET_F_GUEST_ECN);
}
return features;
@@ -174,6 +179,14 @@ static void virtio_net_set_features(VirtIODevice *vdev, uint32_t features)
VirtIONet *n = to_virtio_net(vdev);
n->mergeable_rx_bufs = !!(features & (1 << VIRTIO_NET_F_MRG_RXBUF));
+
+ if (peer_has_vnet_hdr(n)) {
+ tap_set_offload(n->vc->peer,
+ (features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
+ (features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
+ (features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
+ (features >> VIRTIO_NET_F_GUEST_ECN) & 1);
+ }
}
static int virtio_net_handle_rx_mode(VirtIONet *n, uint8_t cmd,
@@ -700,6 +713,11 @@ static int virtio_net_load(QEMUFile *f, void *opaque, int version_id)
if (peer_has_vnet_hdr(n)) {
tap_using_vnet_hdr(n->vc->peer, 1);
+ tap_set_offload(n->vc->peer,
+ (n->vdev.features >> VIRTIO_NET_F_GUEST_CSUM) & 1,
+ (n->vdev.features >> VIRTIO_NET_F_GUEST_TSO4) & 1,
+ (n->vdev.features >> VIRTIO_NET_F_GUEST_TSO6) & 1,
+ (n->vdev.features >> VIRTIO_NET_F_GUEST_ECN) & 1);
}
}
We query the guest's feature set to see if it supports offload and, if so, we enable those features on the tap interface. Signed-off-by: Mark McLoughlin <markmc@redhat.com> --- hw/virtio-net.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-)