diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2011-06-12 16:21:57 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2011-06-12 16:36:53 +0300 |
| commit | bcbabae8ff7f7ec114da9fe2aa7f25f420f35306 (patch) | |
| tree | 568175283599e2c4c696b015a8234b1b6c91c9d6 /hw/vhost_net.c | |
| parent | 01731cfb39ae234a8df852f56fc21efd155dbc26 (diff) | |
| download | focaccia-qemu-bcbabae8ff7f7ec114da9fe2aa7f25f420f35306.tar.gz focaccia-qemu-bcbabae8ff7f7ec114da9fe2aa7f25f420f35306.zip | |
virtio: event index support
Add support for event_idx feature, and utilize it to reduce the number of interrupts and exits for the guest. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/vhost_net.c')
| -rw-r--r-- | hw/vhost_net.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/hw/vhost_net.c b/hw/vhost_net.c index 420e05f112..e8c9e940d9 100644 --- a/hw/vhost_net.c +++ b/hw/vhost_net.c @@ -50,6 +50,9 @@ unsigned vhost_net_get_features(struct vhost_net *net, unsigned features) if (!(net->dev.features & (1 << VIRTIO_RING_F_INDIRECT_DESC))) { features &= ~(1 << VIRTIO_RING_F_INDIRECT_DESC); } + if (!(net->dev.features & (1 << VIRTIO_RING_F_EVENT_IDX))) { + features &= ~(1 << VIRTIO_RING_F_EVENT_IDX); + } if (!(net->dev.features & (1 << VIRTIO_NET_F_MRG_RXBUF))) { features &= ~(1 << VIRTIO_NET_F_MRG_RXBUF); } @@ -65,6 +68,9 @@ void vhost_net_ack_features(struct vhost_net *net, unsigned features) if (features & (1 << VIRTIO_RING_F_INDIRECT_DESC)) { net->dev.acked_features |= (1 << VIRTIO_RING_F_INDIRECT_DESC); } + if (features & (1 << VIRTIO_RING_F_EVENT_IDX)) { + net->dev.acked_features |= (1 << VIRTIO_RING_F_EVENT_IDX); + } if (features & (1 << VIRTIO_NET_F_MRG_RXBUF)) { net->dev.acked_features |= (1 << VIRTIO_NET_F_MRG_RXBUF); } |