linux-kernel - [RFC PATCH 3/8] ARM: gic: Introduce new gic_set

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Date:	Mon, 18 Jun 2012 13:30:06 +0200
From:	Michal Simek <monstr@...str.eu>
To:	linux-kernel@...r.kernel.org
Cc:	Russell King <linux@....linux.org.uk>,
	Marc Zyngier <marc.zyngier@....com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Will Deacon <will.deacon@....com>,
	Rob Herring <rob.herring@...xeda.com>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	Ohad Ben-Cohen <ohad@...ery.com>,
	Peter Crosthwaite <peter.crosthwaite@...alogix.com>,
	Michal Simek <monstr@...str.eu>
Subject: [RFC PATCH 3/8] ARM: gic: Introduce new gic_set_cpu

gic_set_cpu enable option to forward specific IRQ to choosen
ARM core.

Signed-off-by: Michal Simek <monstr@...str.eu>
---
 arch/arm/common/gic.c               |   11 +++++++++++
 arch/arm/include/asm/hardware/gic.h |    2 ++
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index b8e7202..2998d9e 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -257,6 +257,17 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
 
 	return IRQ_SET_MASK_OK;
 }
+
+void gic_set_cpu(unsigned int cpu, unsigned int irq)
+{
+	struct irq_data *d = irq_get_irq_data(irq);
+	struct cpumask mask;
+
+	cpumask_clear(&mask);
+	cpumask_set_cpu(cpu, &mask);
+	gic_set_affinity(d, &mask, true);
+}
+EXPORT_SYMBOL(gic_set_cpu);
 #endif
 
 #ifdef CONFIG_PM
diff --git a/arch/arm/include/asm/hardware/gic.h b/arch/arm/include/asm/hardware/gic.h
index 4b1ce6c..8aa9631 100644
--- a/arch/arm/include/asm/hardware/gic.h
+++ b/arch/arm/include/asm/hardware/gic.h
@@ -46,6 +46,8 @@ void gic_handle_irq(struct pt_regs *regs);
 void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
 void gic_raise_softirq(const struct cpumask *mask, unsigned int irq);
 
+void gic_set_cpu(unsigned int cpu, unsigned int irq);
+
 static inline void gic_init(unsigned int nr, int start,
 			    void __iomem *dist , void __iomem *cpu)
 {
-- 
1.7.0.4

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