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@arm.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 65fabd5f2ec6..cc968eae6c36 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1159,6 +1159,7 @@ 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);