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authorChristoph Hellwig <hch@lst.de>2017-02-05 18:15:23 +0100
committerMichael S. Tsirkin <mst@redhat.com>2017-02-27 20:54:05 +0200
commitbbaba479563910aaa51e59bb9027a09e396d3a3c (patch)
tree0c67858d20c8a87b3abfc8cd4baf4f68ce84165c /include/linux/virtio_config.h
parentfb5e31d970ce8b4941f03ed765d7dbefc39f22d9 (diff)
virtio: provide a method to get the IRQ affinity mask for a virtqueue
This basically passed up the pci_irq_get_affinity information through virtio through an optional get_vq_affinity method. It is only implemented by the PCI backend for now, and only when we use per-virtqueue IRQs. 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 'include/linux/virtio_config.h')
-rw-r--r--include/linux/virtio_config.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 2ebe506fe41a..8355bab175e1 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -58,6 +58,7 @@ struct irq_affinity;
* This returns a pointer to the bus name a la pci_name from which
* the caller can then copy.
* @set_vq_affinity: set the affinity for a virtqueue.
+ * @get_vq_affinity: get the affinity for a virtqueue (optional).
*/
typedef void vq_callback_t(struct virtqueue *);
struct virtio_config_ops {
@@ -77,6 +78,8 @@ struct virtio_config_ops {
int (*finalize_features)(struct virtio_device *vdev);
const char *(*bus_name)(struct virtio_device *vdev);
int (*set_vq_affinity)(struct virtqueue *vq, int cpu);
+ const struct cpumask *(*get_vq_affinity)(struct virtio_device *vdev,
+ int index);
};
/* If driver didn't advertise the feature, it will never appear. */