diff options
| author | Mark McLoughlin <markmc@redhat.com> | 2009-10-22 17:43:47 +0100 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-10-27 12:29:03 -0500 |
| commit | f5436dd96aea2ec937964230831f241ebd3b658b (patch) | |
| tree | 3ded9f3042f591e7b31df21616c49fa18fa98296 | |
| parent | b1c28b464d5f21805d322b67f008e114a484146d (diff) | |
virtio-net: enable tap offload if guest supports it
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>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
| -rw-r--r-- | hw/virtio-net.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/hw/virtio-net.c b/hw/virtio-net.c index d10d183035..5e9520de7f 100644 --- a/hw/virtio-net.c +++ b/hw/virtio-net.c @@ -152,6 +152,11 @@ 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; @@ -177,6 +182,14 @@ 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 (n->has_vnet_hdr) { + 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, @@ -702,6 +715,11 @@ static int virtio_net_load(QEMUFile *f, void *opaque, int version_id) if (n->has_vnet_hdr) { 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); } } |