From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: [patch 1/3] KVM: Add irq ack notifier list Date: Sat, 26 Jul 2008 17:00:59 -0300 Message-ID: <20080726200349.115919262@localhost.localdomain> References: <20080726200058.559700262@localhost.localdomain> Cc: kvm To: Avi Kivity , Sheng Yang Return-path: Received: from mx1.redhat.com ([66.187.233.31]:34845 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755884AbYGZUKO (ORCPT ); Sat, 26 Jul 2008 16:10:14 -0400 Content-Disposition: inline; filename=ack1 Sender: kvm-owner@vger.kernel.org List-ID: From: Avi Kivity This can be used by kvm subsystems that are interested in when interrupts are acked, for example time drift compensation. Signed-off-by: Avi Kivity --- arch/x86/kvm/irq.c | 22 ++++++++++++++++++++++ arch/x86/kvm/irq.h | 5 +++++ include/asm-x86/kvm_host.h | 7 +++++++ 3 files changed, 34 insertions(+), 0 deletions(-) Index: kvm/arch/x86/kvm/irq.c =================================================================== --- kvm.orig/arch/x86/kvm/irq.c +++ kvm/arch/x86/kvm/irq.c @@ -111,3 +111,25 @@ void kvm_set_irq(struct kvm *kvm, int ir 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); +} Index: kvm/arch/x86/kvm/irq.h =================================================================== --- kvm.orig/arch/x86/kvm/irq.h +++ kvm/arch/x86/kvm/irq.h @@ -83,6 +83,11 @@ static inline int irqchip_in_kernel(stru 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); Index: kvm/include/asm-x86/kvm_host.h =================================================================== --- kvm.orig/include/asm-x86/kvm_host.h +++ kvm/include/asm-x86/kvm_host.h @@ -319,6 +319,12 @@ 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]; @@ -334,6 +340,7 @@ 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; --