[PATCH v3 08/11] KVM: arm/arm64: vgic: Add vgic_{get, set}_phys_irq_active
Marc Zyngier
marc.zyngier at arm.com
Fri Jul 24 08:55:06 PDT 2015
In order to control the active state of an interrupt, introduce
a pair of accessors allowing the state to be set/queried.
This only affects the logical state, and the HW state will only be
applied at world-switch time.
Acked-by: Christoffer Dall <christoffer.dall at linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
---
include/kvm/arm_vgic.h | 2 ++
virt/kvm/arm/vgic.c | 24 ++++++++++++++++++++++++
2 files changed, 26 insertions(+)
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 68212a1..7306b4b 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -357,6 +357,8 @@ int kvm_vgic_vcpu_active_irq(struct kvm_vcpu *vcpu);
struct irq_phys_map *kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu,
int virt_irq, int irq);
int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, struct irq_phys_map *map);
+bool kvm_vgic_get_phys_irq_active(struct irq_phys_map *map);
+void kvm_vgic_set_phys_irq_active(struct irq_phys_map *map, bool active);
#define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel))
#define vgic_initialized(k) (!!((k)->arch.vgic.nr_cpus))
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 6422b0c..3f7b690 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1778,6 +1778,30 @@ static void vgic_free_phys_irq_map_rcu(struct rcu_head *rcu)
}
/**
+ * kvm_vgic_get_phys_irq_active - Return the active state of a mapped IRQ
+ *
+ * Return the logical active state of a mapped interrupt. This doesn't
+ * necessarily reflects the current HW state.
+ */
+bool kvm_vgic_get_phys_irq_active(struct irq_phys_map *map)
+{
+ BUG_ON(!map);
+ return map->active;
+}
+
+/**
+ * kvm_vgic_set_phys_irq_active - Set the active state of a mapped IRQ
+ *
+ * Set the logical active state of a mapped interrupt. This doesn't
+ * immediately affects the HW state.
+ */
+void kvm_vgic_set_phys_irq_active(struct irq_phys_map *map, bool active)
+{
+ BUG_ON(!map);
+ map->active = active;
+}
+
+/**
* kvm_vgic_unmap_phys_irq - Remove a virtual to physical IRQ mapping
* @vcpu: The VCPU pointer
* @map: The pointer to a mapping obtained through kvm_vgic_map_phys_irq
--
2.1.4
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