linux-kernel - [tip:irq/core] irqchip/gic: Report that effective affinity is a single target

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Date:   Fri, 18 Aug 2017 01:58:28 -0700
From:   tip-bot for Marc Zyngier <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     xuwei5@...ilicon.com, matt.redfearn@...tec.com,
        linux-kernel@...r.kernel.org, cernekee@...il.com,
        paul.burton@...tec.com, mingo@...nel.org, hpa@...or.com,
        andrew@...n.ch, f.fainelli@...il.com, jcmvbkbc@...il.com,
        marc.zyngier@....com, jason@...edaemon.net,
        gregory.clement@...e-electrons.com, james.hogan@...tec.com,
        tglx@...utronix.de, chris@...kel.net,
        sebastian.hesselbarth@...il.com
Subject: [tip:irq/core] irqchip/gic: Report that effective affinity is a
 single target

Commit-ID:  0c9e498286ef9762e0ae62fc8a02b4739796970f
Gitweb:     http://git.kernel.org/tip/0c9e498286ef9762e0ae62fc8a02b4739796970f
Author:     Marc Zyngier <marc.zyngier@....com>
AuthorDate: Fri, 18 Aug 2017 09:39:16 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 18 Aug 2017 10:54:40 +0200

irqchip/gic: Report that effective affinity is a single target

The GIC driver only targets a single CPU at a time, even if
the notional affinity is wider. Let's inform the core code
about this.

Signed-off-by: Marc Zyngier <marc.zyngier@....com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: James Hogan <james.hogan@...tec.com>
Cc: Jason Cooper <jason@...edaemon.net>
Cc: Paul Burton <paul.burton@...tec.com>
Cc: Chris Zankel <chris@...kel.net>
Cc: Kevin Cernekee <cernekee@...il.com>
Cc: Wei Xu <xuwei5@...ilicon.com>
Cc: Max Filippov <jcmvbkbc@...il.com>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Gregory Clement <gregory.clement@...e-electrons.com>
Cc: Matt Redfearn <matt.redfearn@...tec.com>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Link: http://lkml.kernel.org/r/20170818083925.10108-4-marc.zyngier@arm.com

---
 drivers/irqchip/Kconfig   | 1 +
 drivers/irqchip/irq-gic.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index f1fd5f4..586929d 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -7,6 +7,7 @@ config ARM_GIC
 	select IRQ_DOMAIN
 	select IRQ_DOMAIN_HIERARCHY
 	select MULTI_IRQ_HANDLER
+	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
 
 config ARM_GIC_PM
 	bool
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 1b1df4f..20dd2ba 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -344,6 +344,8 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
 	writel_relaxed(val | bit, reg);
 	gic_unlock_irqrestore(flags);
 
+	irq_data_update_effective_affinity(d, cpumask_of(cpu));
+
 	return IRQ_SET_MASK_OK_DONE;
 }
 #endif
@@ -966,6 +968,7 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
 		irq_domain_set_info(d, irq, hw, &gic->chip, d->host_data,
 				    handle_fasteoi_irq, NULL, NULL);
 		irq_set_probe(irq);
+		irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
 	}
 	return 0;
 }