linux-kernel - [tip:irq/core] xen/events: Add support for effective affinity mask

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Date:   Thu, 22 Jun 2017 10:05:16 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     peterz@...radead.org, axboe@...nel.dk, hpa@...or.com, hch@....de,
        keith.busch@...el.com, tglx@...utronix.de, marc.zyngier@....com,
        linux-kernel@...r.kernel.org, mingo@...nel.org, mpe@...erman.id.au
Subject: [tip:irq/core] xen/events: Add support for effective affinity mask

Commit-ID:  ef1c2cc88531a967fa97d1ac1f3f8a64ee6910b4
Gitweb:     http://git.kernel.org/tip/ef1c2cc88531a967fa97d1ac1f3f8a64ee6910b4
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 20 Jun 2017 01:37:45 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 22 Jun 2017 18:21:23 +0200

xen/events: Add support for effective affinity mask

Update the effective affinity mask when an interrupt was successfully
targeted to a CPU.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Keith Busch <keith.busch@...el.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Christoph Hellwig <hch@....de>
Link: http://lkml.kernel.org/r/20170619235446.799944725@linutronix.de

---
 drivers/xen/events/events_base.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index b52852f..2e567d8 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -1343,8 +1343,12 @@ static int set_affinity_irq(struct irq_data *data, const struct cpumask *dest,
 			    bool force)
 {
 	unsigned tcpu = cpumask_first_and(dest, cpu_online_mask);
+	int ret = rebind_irq_to_cpu(data->irq, tcpu);
 
-	return rebind_irq_to_cpu(data->irq, tcpu);
+	if (!ret)
+		irq_data_update_effective_affinity(data, cpumask_of(tcpu));
+
+	return ret;
 }
 
 static void enable_dynirq(struct irq_data *data)