diff options
| author |   Christoph Hellwig <hch@lst.de> | 2017-02-05 18:15:22 +0100 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2017-02-27 20:54:04 +0200 |
| commit | fb5e31d970ce8b4941f03ed765d7dbefc39f22d9 (patch) | |
| tree | f7b64532549f35aad0933fae46346e59151d3a71 /drivers/virtio/virtio_input.c | |
| parent | virtio_pci: simplify MSI-X setup (diff) | |
| download | linux-dev-fb5e31d970ce8b4941f03ed765d7dbefc39f22d9.tar.xz linux-dev-fb5e31d970ce8b4941f03ed765d7dbefc39f22d9.zip | |
virtio: allow drivers to request IRQ affinity when creating VQs
Add a struct irq_affinity pointer to the find_vqs methods, which if set
is used to tell the PCI layer to create the MSI-X vectors for our I/O
virtqueues with the proper affinity from the start. Compared to after
the fact affinity hints this gives us an instantly working setup and
allows to allocate the irq descritors node-local and avoid interconnect
traffic. Last but not least this will allow blk-mq queues are created
based on the interrupt affinity for storage drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio/virtio_input.c')
| -rw-r--r-- | drivers/virtio/virtio_input.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c index 350a2a5a49db..79f1293cda93 100644 --- a/drivers/virtio/virtio_input.c +++ b/drivers/virtio/virtio_input.c @@ -173,7 +173,8 @@ static int virtinput_init_vqs(struct virtio_input *vi) static const char * const names[] = { "events", "status" }; int err; - err = vi->vdev->config->find_vqs(vi->vdev, 2, vqs, cbs, names); + err = vi->vdev->config->find_vqs(vi->vdev, 2, vqs, cbs, names, + NULL); if (err) return err; vi->evt = vqs[0]; |