From c7f63c5d13925c97a4ae9908bd933ab197872161 Mon Sep 17 00:00:00 2001 From: Daniel Wagner Date: Mon, 2 Dec 2024 15:00:11 +0100 Subject: [PATCH] virtio: hookup irq_get_affinity callback 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 Reviewed-by: Hannes Reinecke Reviewed-by: Ming Lei Reviewed-by: John Garry Signed-off-by: Daniel Wagner Link: https://lore.kernel.org/r/20241202-refactor-blk-affinity-helpers-v6-3-27211e9c2cd5@kernel.org Signed-off-by: Jens Axboe --- drivers/virtio/virtio.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index b9095751e43bb..b10ed9f5b5435 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -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)