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virtio: Make vp_set_vq_affinity() take a mask.

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Make vp_set_vq_affinity() take a cpumask instead of taking a single CPU.

If there are fewer queues than cores, queue affinity should be able to
map to multiple cores.

Link: https://patchwork.ozlabs.org/patch/948149/
Suggested-by: Willem de Bruijn <[email protected]>
Signed-off-by: Caleb Raitto <[email protected]>
Acked-by: Gonglei <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Caleb Raitto 2018-08-09 18:18:28 -07:00 • committed by David S. Miller
commit 19e226e8cc
5 changed files with 14 additions and 14 deletions
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7
drivers/virtio/virtio_pci_common.c
View file

@ -421,7 +421,7 @@ const char *vp_bus_name(struct virtio_device *vdev)
* - OR over all affinities for shared MSI
* - ignore the affinity request if we're using INTX
*/
int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
int vp_set_vq_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask)
{
struct virtio_device *vdev = vq->vdev;
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
@ -435,11 +435,10 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
if (vp_dev->msix_enabled) {
mask = vp_dev->msix_affinity_masks[info->msix_vector];
irq = pci_irq_vector(vp_dev->pci_dev, info->msix_vector);
if (cpu == -1)
if (!cpu_mask)
irq_set_affinity_hint(irq, NULL);
else {
cpumask_clear(mask);
cpumask_set_cpu(cpu, mask);
cpumask_copy(mask, cpu_mask);
irq_set_affinity_hint(irq, mask);
}
}

2
drivers/virtio/virtio_pci_common.h
View file

@ -141,7 +141,7 @@ const char *vp_bus_name(struct virtio_device *vdev);
* - OR over all affinities for shared MSI
* - ignore the affinity request if we're using INTX
*/
int vp_set_vq_affinity(struct virtqueue *vq, int cpu);
int vp_set_vq_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask);
const struct cpumask *vp_get_vq_affinity(struct virtio_device *vdev, int index);