aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorAvi Kivity <avi@qumranet.com>2008-07-26 17:00:59 -0300
committerAvi Kivity <avi@qumranet.com>2008-10-15 10:15:16 +0200
commit564f15378f04921d5749f27ec53d5e68a6d1d446 (patch)
tree5ba58d06003010de40989a99b920602a1e76fdf9
parent49dd2c492895828a90ecdf889e7fe9cfb40a82a7 (diff)
downloadmrst-s0i3-test-564f15378f04921d5749f27ec53d5e68a6d1d446.tar.gz
mrst-s0i3-test-564f15378f04921d5749f27ec53d5e68a6d1d446.tar.xz
mrst-s0i3-test-564f15378f04921d5749f27ec53d5e68a6d1d446.zip
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: Avi Kivity <avi@qumranet.com>
-rw-r--r--arch/x86/kvm/irq.c22
-rw-r--r--arch/x86/kvm/irq.h5
-rw-r--r--include/asm-x86/kvm_host.h7
3 files changed, 34 insertions, 0 deletions
diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
index 0d9e55275af..90911958d85 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 07ff2aef0c1..95fe718e3ab 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/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 83afa10c77f..d451928fc84 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -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;