diff options
| -rw-r--r-- | include/linux/kvm_host.h | 2 | ||||
| -rw-r--r-- | include/trace/events/kvm.h | 8 | ||||
| -rw-r--r-- | virt/kvm/eventfd.c | 122 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
4 files changed, 69 insertions, 65 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 8593d2e61cbf..a4c33b34fe3f 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -388,6 +388,8 @@ struct kvm { */ struct kvm_irq_routing_table __rcu *irq_routing; struct hlist_head mask_notifier_list; +#endif +#ifdef CONFIG_HAVE_KVM_IRQFD struct hlist_head irq_ack_notifier_list; #endif diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h index 131a0bda7aec..908925ace776 100644 --- a/include/trace/events/kvm.h +++ b/include/trace/events/kvm.h @@ -37,7 +37,7 @@ TRACE_EVENT(kvm_userspace_exit, __entry->errno < 0 ? -__entry->errno : __entry->reason) ); -#if defined(CONFIG_HAVE_KVM_IRQCHIP) +#if defined(CONFIG_HAVE_KVM_IRQFD) TRACE_EVENT(kvm_set_irq, TP_PROTO(unsigned int gsi, int level, int irq_source_id), TP_ARGS(gsi, level, irq_source_id), @@ -57,7 +57,7 @@ TRACE_EVENT(kvm_set_irq, TP_printk("gsi %u level %d source %d", __entry->gsi, __entry->level, __entry->irq_source_id) ); -#endif +#endif /* defined(CONFIG_HAVE_KVM_IRQFD) */ #if defined(__KVM_HAVE_IOAPIC) #define kvm_deliver_mode \ @@ -124,7 +124,7 @@ TRACE_EVENT(kvm_msi_set_irq, #endif /* defined(__KVM_HAVE_IOAPIC) */ -#if defined(CONFIG_HAVE_KVM_IRQCHIP) +#if defined(CONFIG_HAVE_KVM_IRQFD) TRACE_EVENT(kvm_ack_irq, TP_PROTO(unsigned int irqchip, unsigned int pin), @@ -149,7 +149,7 @@ TRACE_EVENT(kvm_ack_irq, #endif ); -#endif /* defined(CONFIG_HAVE_KVM_IRQCHIP) */ +#endif /* defined(CONFIG_HAVE_KVM_IRQFD) */ diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index f5f61548f60d..3c5981c87c3f 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -445,6 +445,67 @@ out: kfree(irqfd); return ret; } + +bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin) +{ + struct kvm_irq_ack_notifier *kian; + int gsi, idx; + + idx = srcu_read_lock(&kvm->irq_srcu); + gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin); + if (gsi != -1) + hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list, + link) + if (kian->gsi == gsi) { + srcu_read_unlock(&kvm->irq_srcu, idx); + return true; + } + + srcu_read_unlock(&kvm->irq_srcu, idx); + + return false; +} +EXPORT_SYMBOL_GPL(kvm_irq_has_notifier); + +void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin) +{ + struct kvm_irq_ack_notifier *kian; + int gsi, idx; + + trace_kvm_ack_irq(irqchip, pin); + + idx = srcu_read_lock(&kvm->irq_srcu); + gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin); + if (gsi != -1) + hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list, + link) + if (kian->gsi == gsi) + kian->irq_acked(kian); + srcu_read_unlock(&kvm->irq_srcu, idx); +} + +void kvm_register_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian) +{ + mutex_lock(&kvm->irq_lock); + hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list); + mutex_unlock(&kvm->irq_lock); +#ifdef __KVM_HAVE_IOAPIC + kvm_vcpu_request_scan_ioapic(kvm); +#endif +} + +void kvm_unregister_irq_ack_notifier(struct kvm *kvm, + struct kvm_irq_ack_notifier *kian) +{ + mutex_lock(&kvm->irq_lock); + hlist_del_init_rcu(&kian->link); + mutex_unlock(&kvm->irq_lock); + synchronize_srcu(&kvm->irq_srcu); +#ifdef __KVM_HAVE_IOAPIC + kvm_vcpu_request_scan_ioapic(kvm); +#endif +} #endif void @@ -867,64 +928,3 @@ kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) return kvm_assign_ioeventfd(kvm, args); } - -bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin) -{ - struct kvm_irq_ack_notifier *kian; - int gsi, idx; - - idx = srcu_read_lock(&kvm->irq_srcu); - gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin); - if (gsi != -1) - hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list, - link) - if (kian->gsi == gsi) { - srcu_read_unlock(&kvm->irq_srcu, idx); - return true; - } - - srcu_read_unlock(&kvm->irq_srcu, idx); - - return false; -} -EXPORT_SYMBOL_GPL(kvm_irq_has_notifier); - -void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin) -{ - struct kvm_irq_ack_notifier *kian; - int gsi, idx; - - trace_kvm_ack_irq(irqchip, pin); - - idx = srcu_read_lock(&kvm->irq_srcu); - gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin); - if (gsi != -1) - hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list, - link) - if (kian->gsi == gsi) - kian->irq_acked(kian); - srcu_read_unlock(&kvm->irq_srcu, idx); -} - -void kvm_register_irq_ack_notifier(struct kvm *kvm, - struct kvm_irq_ack_notifier *kian) -{ - mutex_lock(&kvm->irq_lock); - hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list); - mutex_unlock(&kvm->irq_lock); -#ifdef __KVM_HAVE_IOAPIC - kvm_vcpu_request_scan_ioapic(kvm); -#endif -} - -void kvm_unregister_irq_ack_notifier(struct kvm *kvm, - struct kvm_irq_ack_notifier *kian) -{ - mutex_lock(&kvm->irq_lock); - hlist_del_init_rcu(&kian->link); - mutex_unlock(&kvm->irq_lock); - synchronize_srcu(&kvm->irq_srcu); -#ifdef __KVM_HAVE_IOAPIC - kvm_vcpu_request_scan_ioapic(kvm); -#endif -} diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index a69a623938b8..33712fb26eb1 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -465,6 +465,8 @@ static struct kvm *kvm_create_vm(unsigned long type) #ifdef CONFIG_HAVE_KVM_IRQCHIP INIT_HLIST_HEAD(&kvm->mask_notifier_list); +#endif +#ifdef CONFIG_HAVE_KVM_IRQFD INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); #endif |