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KVM: arm/arm64: vgic-new: Implement kvm_vgic_vcpu_pending_irq

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Tell KVM whether a particular VCPU has an IRQ that needs handling
in the guest. This is used to decide whether a VCPU is runnable.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Eric Auger 2015-12-07 15:30:38 +00:00 committed by Christoffer Dall
parent 59529f69f5
commit 90eee56c5f
2 changed files with 27 additions and 0 deletions
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2
include/kvm/vgic/vgic.h
View File

@ -184,6 +184,8 @@ struct vgic_cpu {
int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
bool level);
int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);
#define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel))
#define vgic_initialized(k) (false)
#define vgic_ready(k) ((k)->arch.vgic.ready)

25
virt/kvm/arm/vgic/vgic.c
View File

@ -520,3 +520,28 @@ void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu)
vgic_flush_lr_state(vcpu);
spin_unlock(&vcpu->arch.vgic_cpu.ap_list_lock);
}
int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_irq *irq;
bool pending = false;
if (!vcpu->kvm->arch.vgic.enabled)
return false;
spin_lock(&vgic_cpu->ap_list_lock);
list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) {
spin_lock(&irq->irq_lock);
pending = irq->pending && irq->enabled;
spin_unlock(&irq->irq_lock);
if (pending)
break;
}
spin_unlock(&vgic_cpu->ap_list_lock);
return pending;
}