Commit 90eee56c authored by Eric Auger's avatar Eric Auger Committed by Christoffer Dall
Browse files

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



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: default avatarEric Auger <eric.auger@linaro.org>
Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 59529f69

include/kvm/vgic/vgic.h

+2 −0
Original line number Diff line number Diff line
@@ -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)

virt/kvm/arm/vgic/vgic.c

+25 −0
Original line number Diff line number Diff line
@@ -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;

}