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genirq/msi: Make use of affinity aware allocations 

Allow the MSI code to provide affinity hints per MSI descriptor.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-block@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: axboe@fb.com
Cc: agordeev@redhat.com
Link: http://lkml.kernel.org/r/1467621574-8277-6-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2016-07-04 17:39:26 +09:00
parent 45ddcecbfa
commit 0972fa57f5
2 changed files with 3 additions and 1 deletions
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2
include/linux/msi.h
View File

@ -47,6 +47,7 @@ struct fsl_mc_msi_desc {
* @nvec_used: The number of vectors used * @nvec_used: The number of vectors used
* @dev: Pointer to the device which uses this descriptor * @dev: Pointer to the device which uses this descriptor
* @msg: The last set MSI message cached for reuse * @msg: The last set MSI message cached for reuse
* @affinity: Optional pointer to a cpu affinity mask for this descriptor
* *
* @masked: [PCI MSI/X] Mask bits * @masked: [PCI MSI/X] Mask bits
* @is_msix: [PCI MSI/X] True if MSI-X * @is_msix: [PCI MSI/X] True if MSI-X
@ -67,6 +68,7 @@ struct msi_desc {
unsigned int nvec_used; unsigned int nvec_used;
struct device *dev; struct device *dev;
struct msi_msg msg; struct msi_msg msg;
const struct cpumask *affinity;
union { union {
/* PCI MSI/X specific data */ /* PCI MSI/X specific data */

2
kernel/irq/msi.c
View File

@ -335,7 +335,7 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,
virq = __irq_domain_alloc_irqs(domain, -1, desc->nvec_used, virq = __irq_domain_alloc_irqs(domain, -1, desc->nvec_used,
dev_to_node(dev), &arg, false, dev_to_node(dev), &arg, false,
NULL); desc->affinity);
if (virq < 0) { if (virq < 0) {
ret = -ENOSPC; ret = -ENOSPC;
if (ops->handle_error) if (ops->handle_error)