linux-kernel - [PATCH v2 34/52] irqchip/gic-v3: Advertise GICv4 support to KVM

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Date:   Wed, 28 Jun 2017 16:03:53 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu
Cc:     Christoffer Dall <christoffer.dall@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Eric Auger <eric.auger@...hat.com>,
        Shanker Donthineni <shankerd@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v2 34/52] irqchip/gic-v3: Advertise GICv4 support to KVM

As KVM needs to know about the availability of GICv4 to enable
direct injection of interrupts, let's advertise the feature in
the gic_kvm_info structure.

Signed-off-by: Marc Zyngier <marc.zyngier@....com>
---
 drivers/irqchip/irq-gic-v3.c           | 2 ++
 include/linux/irqchip/arm-gic-common.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index efbd998baa9c..7ce88148da1f 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1156,6 +1156,7 @@ static void __init gic_of_setup_kvm_info(struct device_node *node)
 	if (!ret)
 		gic_v3_kvm_info.vcpu = r;
 
+	gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
 	gic_set_kvm_info(&gic_v3_kvm_info);
 }
 
@@ -1452,6 +1453,7 @@ static void __init gic_acpi_setup_kvm_info(void)
 		vcpu->end = vcpu->start + ACPI_GICV2_VCPU_MEM_SIZE - 1;
 	}
 
+	gic_v3_kvm_info.has_v4 = gic_data.rdists.has_vlpis;
 	gic_set_kvm_info(&gic_v3_kvm_info);
 }
 
diff --git a/include/linux/irqchip/arm-gic-common.h b/include/linux/irqchip/arm-gic-common.h
index c647b0547bcd..0a83b4379f34 100644
--- a/include/linux/irqchip/arm-gic-common.h
+++ b/include/linux/irqchip/arm-gic-common.h
@@ -27,6 +27,8 @@ struct gic_kvm_info {
 	unsigned int	maint_irq;
 	/* Virtual control interface */
 	struct resource vctrl;
+	/* vlpi support */
+	bool		has_v4;
 };
 
 const struct gic_kvm_info *gic_get_kvm_info(void);
-- 
2.11.0