Commit 568e8c90 authored by Andre Przywara's avatar Andre Przywara Committed by Christoffer Dall
Browse files

KVM: arm/arm64: vgic-new: implement mapped IRQ handling 



We now store the mapped hardware IRQ number in our struct, so we
don't need the irq_phys_map for the new VGIC.
Implement the hardware IRQ mapping on top of the reworked arch
timer interface.

Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
parent 03f0c94c

include/kvm/vgic/vgic.h

+5 −0
Original line number Diff line number Diff line
@@ -206,6 +206,11 @@ int kvm_vgic_hyp_init(void); 


int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,

			bool level);

int kvm_vgic_inject_mapped_irq(struct kvm *kvm, int cpuid, unsigned int intid,

			       bool level);

int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, u32 virt_irq, u32 phys_irq);

int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq);

bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq);



int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);

virt/kvm/arm/vgic/vgic.c

+53 −0
Original line number Diff line number Diff line
@@ -312,6 +312,47 @@ int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid, 
	return vgic_update_irq_pending(kvm, cpuid, intid, level, false);

}



int kvm_vgic_inject_mapped_irq(struct kvm *kvm, int cpuid, unsigned int intid,

			       bool level)

{

	return vgic_update_irq_pending(kvm, cpuid, intid, level, true);

}



int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, u32 virt_irq, u32 phys_irq)

{

	struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);



	BUG_ON(!irq);



	spin_lock(&irq->irq_lock);



	irq->hw = true;

	irq->hwintid = phys_irq;



	spin_unlock(&irq->irq_lock);



	return 0;

}



int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq)

{

	struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);



	BUG_ON(!irq);



	if (!vgic_initialized(vcpu->kvm))

		return -EAGAIN;



	spin_lock(&irq->irq_lock);



	irq->hw = false;

	irq->hwintid = 0;



	spin_unlock(&irq->irq_lock);



	return 0;

}



/**

 * vgic_prune_ap_list - Remove non-relevant interrupts from the list

 *
@@ -564,3 +605,15 @@ void vgic_kick_vcpus(struct kvm *kvm) 
			kvm_vcpu_kick(vcpu);

	}

}



bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq)

{

	struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);

	bool map_is_active;



	spin_lock(&irq->irq_lock);

	map_is_active = irq->hw && irq->active;

	spin_unlock(&irq->irq_lock);



	return map_is_active;

}