From: Marc Zyngier <marc.zyngier@arm.com>
Date: Fri, 18 Aug 2017 09:39:17 +0100
Subject: irqchip/gic-v3: Report that effective affinity is a single target
Patch-mainline: v4.14-rc1
Git-commit: 956ae91ae8761f2cd8cd7b8d6cb90fd4d0b8a596
References: FATE#323954

The GICv3 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@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Link: http://lkml.kernel.org/r/20170818083925.10108-5-marc.zyngier@arm.com
Acked-by: Alexander Graf <agraf@suse.de>
---
 drivers/irqchip/Kconfig      |    1 +
 drivers/irqchip/irq-gic-v3.c |    3 +++
 2 files changed, 4 insertions(+)

--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -35,6 +35,7 @@
 	select MULTI_IRQ_HANDLER
 	select IRQ_DOMAIN_HIERARCHY
 	select PARTITION_PERCPU
+	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
 
 config ARM_GIC_V3_ITS
 	bool
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -677,6 +677,8 @@
 	else
 		gic_dist_wait_for_rwp();
 
+	irq_data_update_effective_affinity(d, cpumask_of(cpu));
+
 	return IRQ_SET_MASK_OK_DONE;
 }
 #else
@@ -775,6 +777,7 @@
 		irq_domain_set_info(d, irq, hw, 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)));
 	}
 	/* LPIs */
 	if (hw >= 8192 && hw < GIC_ID_NR) {