linux-kernel - [PATCH v2 10/12] irqchip/hip04: Report that effective affinity is a single target

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Date:   Fri, 18 Aug 2017 09:39:23 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Wei Xu <xuwei5@...ilicon.com>,
        James Hogan <james.hogan@...tec.com>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Kevin Cernekee <cernekee@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Paul Burton <paul.burton@...tec.com>,
        Matt Redfearn <matt.redfearn@...tec.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 10/12] irqchip/hip04: Report that effective affinity is a single target

The HIP04 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>
---
 arch/arm/mach-hisi/Kconfig  | 1 +
 drivers/irqchip/irq-hip04.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/arch/arm/mach-hisi/Kconfig b/arch/arm/mach-hisi/Kconfig
index a3b091a4d344..65a048fa08ec 100644
--- a/arch/arm/mach-hisi/Kconfig
+++ b/arch/arm/mach-hisi/Kconfig
@@ -39,6 +39,7 @@ config ARCH_HIP04
 	select HAVE_ARM_ARCH_TIMER
 	select MCPM if SMP
 	select MCPM_QUAD_CLUSTER if SMP
+	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
 	help
 	  Support for Hisilicon HiP04 SoC family
 
diff --git a/drivers/irqchip/irq-hip04.c b/drivers/irqchip/irq-hip04.c
index c1b4ee955dbe..5b4fd2f4e5f8 100644
--- a/drivers/irqchip/irq-hip04.c
+++ b/drivers/irqchip/irq-hip04.c
@@ -165,6 +165,8 @@ static int hip04_irq_set_affinity(struct irq_data *d,
 	writel_relaxed(val | bit, reg);
 	raw_spin_unlock(&irq_controller_lock);
 
+	irq_data_update_effective_affinity(d, cpumask_of(cpu));
+
 	return IRQ_SET_MASK_OK;
 }
 #endif
@@ -312,6 +314,7 @@ static int hip04_irq_domain_map(struct irq_domain *d, unsigned int irq,
 		irq_set_chip_and_handler(irq, &hip04_irq_chip,
 					 handle_fasteoi_irq);
 		irq_set_probe(irq);
+		irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
 	}
 	irq_set_chip_data(irq, d->host_data);
 	return 0;
-- 
2.11.0