lkml.org 
[lkml]   [2016]   [Jul]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 05/13] irq/msi: Make use of affinity aware allocations
Date
From: Thomas Gleixner <tglx@linutronix.de>

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.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)
--
2.1.4
\
 
 \ /
  Last update: 2016-07-04 11:21    [W:0.320 / U:0.640 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site