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

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Message-ID: <tip-500912121411e0175d44b69a7810ac6068e78326@git.kernel.org>
Date:   Fri, 18 Aug 2017 02:01:58 -0700
From:   tip-bot for Marc Zyngier <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, paul.burton@...tec.com,
        matt.redfearn@...tec.com, chris@...kel.net, jcmvbkbc@...il.com,
        mingo@...nel.org, andrew@...n.ch,
        gregory.clement@...e-electrons.com, jason@...edaemon.net,
        hpa@...or.com, james.hogan@...tec.com, tglx@...utronix.de,
        xuwei5@...ilicon.com, marc.zyngier@....com,
        sebastian.hesselbarth@...il.com, cernekee@...il.com,
        f.fainelli@...il.com
Subject: [tip:irq/core] irqchip/xtensa-mx: Report that effective affinity is
 a single target

Commit-ID:  500912121411e0175d44b69a7810ac6068e78326
Gitweb:     http://git.kernel.org/tip/500912121411e0175d44b69a7810ac6068e78326
Author:     Marc Zyngier <marc.zyngier@....com>
AuthorDate: Fri, 18 Aug 2017 09:39:25 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Fri, 18 Aug 2017 10:54:43 +0200

irqchip/xtensa-mx: Report that effective affinity is a single target

The xtensa-mx 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/20170818083925.10108-13-marc.zyngier@arm.com

---
 drivers/irqchip/Kconfig         | 1 +
 drivers/irqchip/irq-xtensa-mx.c | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index bca9a88..1139de9 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -223,6 +223,7 @@ config VERSATILE_FPGA_IRQ_NR
 config XTENSA_MX
 	bool
 	select IRQ_DOMAIN
+	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
 
 config XILINX_INTC
 	bool
diff --git a/drivers/irqchip/irq-xtensa-mx.c b/drivers/irqchip/irq-xtensa-mx.c
index 72a391e..a15a951 100644
--- a/drivers/irqchip/irq-xtensa-mx.c
+++ b/drivers/irqchip/irq-xtensa-mx.c
@@ -32,6 +32,7 @@ static int xtensa_mx_irq_map(struct irq_domain *d, unsigned int irq,
 		irq_set_status_flags(irq, IRQ_LEVEL);
 		return 0;
 	}
+	irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
 	return xtensa_irq_map(d, irq, hw);
 }
 
@@ -121,9 +122,12 @@ static int xtensa_mx_irq_retrigger(struct irq_data *d)
 static int xtensa_mx_irq_set_affinity(struct irq_data *d,
 		const struct cpumask *dest, bool force)
 {
-	unsigned mask = 1u << cpumask_any_and(dest, cpu_online_mask);
+	int cpu = cpumask_any_and(dest, cpu_online_mask);
+	unsigned mask = 1u << cpu;
 
 	set_er(mask, MIROUT(d->hwirq - HW_IRQ_MX_BASE));
+	irq_data_update_effective_affinity(d, cpumask_of(cpu));
+
 	return 0;
 
 }