linux-kernel - [tip:irq/core] genirq/msi: Make use of affinity aware allocations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 4 Jul 2016 03:33:59 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hch@....de, linux-kernel@...r.kernel.org, tglx@...utronix.de,
	hpa@...or.com, mingo@...nel.org
Subject: [tip:irq/core] genirq/msi: Make use of affinity aware allocations

Commit-ID:  0972fa57f53525ffa6ced12d703750fc2791e3ce
Gitweb:     http://git.kernel.org/tip/0972fa57f53525ffa6ced12d703750fc2791e3ce
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Mon, 4 Jul 2016 17:39:26 +0900
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 4 Jul 2016 12:25:14 +0200

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@...utronix.de>
Cc: Christoph Hellwig <hch@....de>
Cc: linux-block@...r.kernel.org
Cc: linux-pci@...r.kernel.org
Cc: linux-nvme@...ts.infradead.org
Cc: axboe@...com
Cc: agordeev@...hat.com
Link: http://lkml.kernel.org/r/1467621574-8277-6-git-send-email-hch@lst.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 include/linux/msi.h | 2 ++
 kernel/irq/msi.c    | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/linux/msi.h b/include/linux/msi.h
index c33abfa..4f0bfe5 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -47,6 +47,7 @@ struct fsl_mc_msi_desc {
  * @nvec_used:	The number of vectors used
  * @dev:	Pointer to the device which uses this descriptor
  * @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
  * @is_msix:	[PCI MSI/X] True if MSI-X
@@ -67,6 +68,7 @@ struct msi_desc {
 	unsigned int			nvec_used;
 	struct device			*dev;
 	struct msi_msg			msg;
+	const struct cpumask		*affinity;
 
 	union {
 		/* PCI MSI/X specific data */
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 58dbbac..0e2a736 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -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,
 					       dev_to_node(dev), &arg, false,
-					       NULL);
+					       desc->affinity);
 		if (virq < 0) {
 			ret = -ENOSPC;
 			if (ops->handle_error)