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virtio: hookup irq_get_affinity callback

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struct bus_type has a new callback for retrieving the IRQ affinity for a
device. Hook this callback up for virtio based devices.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Daniel Wagner <wagi@kernel.org>
Link: https://lore.kernel.org/r/20241202-refactor-blk-affinity-helpers-v6-3-27211e9c2cd5@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Daniel Wagner 2024-12-02 15:00:11 +01:00 committed by Jens Axboe
parent 86ae920136
commit df0e932e86
1 changed files with 19 additions and 0 deletions
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19
drivers/virtio/virtio.c
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@ -377,6 +377,24 @@ static void virtio_dev_remove(struct device *_d)
of_node_put(dev->dev.of_node);
}
/*
* virtio_irq_get_affinity - get IRQ affinity mask for device
* @_d: ptr to dev structure
* @irq_vec: interrupt vector number
*
* Return the CPU affinity mask for @_d and @irq_vec.
*/
static const struct cpumask *virtio_irq_get_affinity(struct device *_d,
unsigned int irq_vec)
{
struct virtio_device *dev = dev_to_virtio(_d);
if (!dev->config->get_vq_affinity)
return NULL;
return dev->config->get_vq_affinity(dev, irq_vec);
}
static const struct bus_type virtio_bus = {
.name = "virtio",
.match = virtio_dev_match,
@ -384,6 +402,7 @@ static const struct bus_type virtio_bus = {
.uevent = virtio_uevent,
.probe = virtio_dev_probe,
.remove = virtio_dev_remove,
.irq_get_affinity = virtio_irq_get_affinity,
};
int __register_virtio_driver(struct virtio_driver *driver, struct module *owner)