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authorChristoph Hellwig <hch@lst.de>2017-02-05 20:15:22 +0300
committerMichael S. Tsirkin <mst@redhat.com>2017-02-27 21:54:04 +0300
commitfb5e31d970ce8b4941f03ed765d7dbefc39f22d9 (patch)
treef7b64532549f35aad0933fae46346e59151d3a71 /drivers/char
parent52a61516125fa9a21b3bdf4f90928308e2e5573f (diff)
downloadlinux-fb5e31d970ce8b4941f03ed765d7dbefc39f22d9.tar.xz
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/char')
-rw-r--r--drivers/char/virtio_console.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 17857beb4892..6266c0568e1d 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1939,7 +1939,7 @@ static int init_vqs(struct ports_device *portdev)
/* Find the queues. */
err = portdev->vdev->config->find_vqs(portdev->vdev, nr_queues, vqs,
io_callbacks,
- (const char **)io_names);
+ (const char **)io_names, NULL);
if (err)
goto free;