genirq/affinity: Add support for allocating interrupt sets

A driver may have a need to allocate multiple sets of MSI/MSI-X interrupts,
and have them appropriately affinitized.

Add support for defining a number of sets in the irq_affinity structure, of
varying sizes, and get each set affinitized correctly across the machine.

[ tglx: Minor changelog tweaks ]

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Cc: linux-block@vger.kernel.org
Link: https://lkml.kernel.org/r/20181102145951.31979-5-ming.lei@redhat.com
This commit is contained in:
Jens Axboe
2018-11-02 22:59:51 +08:00
committed by Thomas Gleixner
parent 060746d9e3
commit 6da4b3ab9a
3 changed files with 72 additions and 23 deletions

View File

@@ -247,10 +247,14 @@ struct irq_affinity_notify {
* the MSI(-X) vector space
* @post_vectors: Don't apply affinity to @post_vectors at end of
* the MSI(-X) vector space
* @nr_sets: Length of passed in *sets array
* @sets: Number of affinitized sets
*/
struct irq_affinity {
int pre_vectors;
int post_vectors;
int nr_sets;
int *sets;
};
#if defined(CONFIG_SMP)