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Commit 564f1537 authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: Add irq ack notifier list 



This can be used by kvm subsystems that are interested in when
interrupts are acked, for example time drift compensation.

Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent 49dd2c49

arch/x86/kvm/irq.c

+22 −0
Original line number Diff line number Diff line
@@ -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);

}

arch/x86/kvm/irq.h

+5 −0
Original line number Diff line number Diff line
@@ -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);

include/asm-x86/kvm_host.h

+7 −0
Original line number Diff line number Diff line
@@ -321,6 +321,12 @@ 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];
@@ -336,6 +342,7 @@ 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;