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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/virtio/virtio_pci_common.h
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/virtio/virtio_pci_common.h')
-rw-r--r--drivers/virtio/virtio_pci_common.h5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index 217ca876eed7..a6ad9ec6baef 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -97,9 +97,8 @@ bool vp_notify(struct virtqueue *vq);
void vp_del_vqs(struct virtio_device *vdev);
/* the config->find_vqs() implementation */
int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[]);
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc);
const char *vp_bus_name(struct virtio_device *vdev);
/* Setup the affinity for a virtqueue: