This can be used by kvm subsystems that are interested in when interrupts are acked, for example time drift compenstation. Signed-off-by: Avi Kivity <avi at qumranet.com> diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index 0d9e552..9091195 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -111,3 +111,25 @@ void kvm_set_irq(struct kvm *kvm, int irq, int level) kvm_ioapic_set_irq(kvm->arch.vioapic, irq, level); kvm_pic_set_irq(pic_irqchip(kvm), irq, level); } + +void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi) +{ + struct kvm_irq_ack_notifier *kian; + struct hlist_node *n; + + hlist_for_each_entry(kian, n, &kvm->arch.irq_ack_notifier_list, link) + if (kian->gsi == gsi) + kian->irq_acked(kian); +} + +void kvm_register_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian) +{ + hlist_add_head(&kian->link, &kvm->arch.irq_ack_notifier_list); +} + +void kvm_unregister_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian) +{ + hlist_del(&kian->link); +} diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h index 07ff2ae..95fe718 100644 --- a/arch/x86/kvm/irq.h +++ b/arch/x86/kvm/irq.h @@ -83,6 +83,11 @@ static inline int irqchip_in_kernel(struct kvm *kvm) void kvm_pic_reset(struct kvm_kpic_state *s); void kvm_set_irq(struct kvm *kvm, int irq, int level); +void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi); +void kvm_register_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian); +void kvm_unregister_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian); void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec); void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index c7bad53..a016900 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3948,6 +3948,7 @@ struct kvm *kvm_arch_create_vm(void) return ERR_PTR(-ENOMEM); INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); + INIT_HLIST_HEAD(&kvm->arch.irq_ack_notifier_list); return kvm; } diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h index b893a85..73756e5 100644 --- a/include/asm-x86/kvm_host.h +++ b/include/asm-x86/kvm_host.h @@ -314,6 +314,12 @@ struct kvm_mem_alias { gfn_t target_gfn; }; +struct kvm_irq_ack_notifier { + struct hlist_node link; + unsigned gsi; + void (*irq_acked)(struct kvm_irq_ack_notifier *kian); +}; + struct kvm_arch{ int naliases; struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS]; @@ -329,6 +335,7 @@ struct kvm_arch{ struct kvm_pic *vpic; struct kvm_ioapic *vioapic; struct kvm_pit *vpit; + struct hlist_head irq_ack_notifier_list; int round_robin_prev_vcpu; unsigned int tss_addr; --------------040605070007030807060607--