From bbaba479563910aaa51e59bb9027a09e396d3a3c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 5 Feb 2017 18:15:23 +0100 Subject: 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 Reviewed-by: Jason Wang Signed-off-by: Michael S. Tsirkin --- include/linux/virtio_config.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') 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. */ -- cgit