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authorChristoph Hellwig <hch@lst.de>2017-02-05 18:15:22 +0100
committerMichael S. Tsirkin <mst@redhat.com>2017-02-27 20:54:04 +0200
commitfb5e31d970ce8b4941f03ed765d7dbefc39f22d9 (patch)
treef7b64532549f35aad0933fae46346e59151d3a71 /drivers/s390/virtio
parent52a61516125fa9a21b3bdf4f90928308e2e5573f (diff)
virtio: allow drivers to request IRQ affinity when creating VQs
Add a struct irq_affinity pointer to the find_vqs methods, which if set is used to tell the PCI layer to create the MSI-X vectors for our I/O virtqueues with the proper affinity from the start. Compared to after the fact affinity hints this gives us an instantly working setup and allows to allocate the irq descritors node-local and avoid interconnect traffic. Last but not least this will allow blk-mq queues are created based on the interrupt affinity for storage drivers. 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 'drivers/s390/virtio')
-rw-r--r--drivers/s390/virtio/kvm_virtio.c3
-rw-r--r--drivers/s390/virtio/virtio_ccw.c3
2 files changed, 4 insertions, 2 deletions
diff --git a/drivers/s390/virtio/kvm_virtio.c b/drivers/s390/virtio/kvm_virtio.c
index 5e5c11f37b24..2ce0b3eb2efe 100644
--- a/drivers/s390/virtio/kvm_virtio.c
+++ b/drivers/s390/virtio/kvm_virtio.c
@@ -255,7 +255,8 @@ static void kvm_del_vqs(struct virtio_device *vdev)
static int kvm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct kvm_device *kdev = to_kvmdev(vdev);
int i;
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c
index 070c4da95f48..304d3b3cbfd3 100644
--- a/drivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -628,7 +628,8 @@ out:
static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct virtio_ccw_device *vcdev = to_vc_device(vdev);
unsigned long *indicatorp = NULL;