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| author |   Christoph Hellwig <hch@lst.de> | 2017-02-05 18:15:23 +0100 |
|---|---|---|
| committer |   Michael S. Tsirkin <mst@redhat.com> | 2017-02-27 20:54:05 +0200 |
| commit | bbaba479563910aaa51e59bb9027a09e396d3a3c (patch) | |
| tree | 0c67858d20c8a87b3abfc8cd4baf4f68ce84165c /include/linux/virtio_config.h | |
| parent | virtio: allow drivers to request IRQ affinity when creating VQs (diff) | |
| download | wireguard-linux-bbaba479563910aaa51e59bb9027a09e396d3a3c.tar.xz wireguard-linux-bbaba479563910aaa51e59bb9027a09e396d3a3c.zip | |
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.h | 3 |
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. */ |