When a vPE is not running, the delivery of a VLPI results in a doorbell interrupt to be delivered. Let's handle this interrupt and update the pending_last flag that indicates that VLPIs are pending. Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> --- virt/kvm/arm/vgic/vgic-v4.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/virt/kvm/arm/vgic/vgic-v4.c b/virt/kvm/arm/vgic/vgic-v4.c index a2d1a6db0490..fe0d0a8ed469 100644 --- a/virt/kvm/arm/vgic/vgic-v4.c +++ b/virt/kvm/arm/vgic/vgic-v4.c @@ -21,6 +21,14 @@ #include "vgic.h" +static irqreturn_t vgic_v4_doorbell_handler(int irq, void *info) +{ + struct kvm_vcpu *vcpu = info; + + vcpu->arch.vgic_cpu.vgic_v3.its_vpe.pending_last = true; + return IRQ_HANDLED; +} + int vgic_v4_init(struct kvm *kvm) { struct vgic_dist *dist = &kvm->arch.vgic; @@ -47,12 +55,34 @@ int vgic_v4_init(struct kvm *kvm) return ret; } + kvm_for_each_vcpu(i, vcpu, kvm) { + int irq = dist->its_vm.vpes[i]->irq; + + ret = request_irq(irq, vgic_v4_doorbell_handler, + 0, "vcpu", vcpu); + if (ret) { + kvm_err("failed to allocate vcpu IRQ%d\n", irq); + dist->its_vm.nr_vpes = i; + break; + } + } + + if (ret) + vgic_v4_teardown(kvm); + return ret; } void vgic_v4_teardown(struct kvm *kvm) { struct its_vm *its_vm = &kvm->arch.vgic.its_vm; + struct kvm_vcpu *vcpu; + int i; + + for (i = 0; i < its_vm->nr_vpes; i++) { + vcpu = kvm_get_vcpu(kvm, i); + free_irq(its_vm->vpes[i]->irq, vcpu); + } its_free_vcpu_irqs(its_vm); kfree(its_vm->vpes); -- 2.11.0 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm