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KVM: arm/arm64: vgic: Add vgic_{get,set}_phys_irq_active 

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@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2015-06-08 16:13:30 +01:00
parent 08fd6461e8
commit 6e84e0e067
2 changed files with 26 additions and 0 deletions
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2
include/kvm/arm_vgic.h
View File

@ -356,6 +356,8 @@ int kvm_vgic_vcpu_active_irq(struct kvm_vcpu *vcpu);
struct irq_phys_map *kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, struct irq_phys_map *kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu,
int virt_irq, int irq); int virt_irq, int irq);
int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, struct irq_phys_map *map); 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 irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel))
#define vgic_initialized(k) (!!((k)->arch.vgic.nr_cpus)) #define vgic_initialized(k) (!!((k)->arch.vgic.nr_cpus))

24
virt/kvm/arm/vgic.c
View File

@ -1801,6 +1801,30 @@ static void vgic_free_phys_irq_map_rcu(struct rcu_head *rcu)
kfree(entry); kfree(entry);
} }
/**
* 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 * kvm_vgic_unmap_phys_irq - Remove a virtual to physical IRQ mapping
* @vcpu: The VCPU pointer * @vcpu: The VCPU pointer