diff options
Diffstat (limited to 'virt/kvm/irq_comm.c')
| -rw-r--r-- | virt/kvm/irq_comm.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 656fa455e15..ff6d40e2c06 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -22,6 +22,7 @@ #include <linux/kvm_host.h> #include <linux/slab.h> +#include <linux/export.h> #include <trace/events/kvm.h> #include <asm/msidef.h> @@ -237,6 +238,28 @@ int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level) return ret; } +bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin) +{ + struct kvm_irq_ack_notifier *kian; + struct hlist_node *n; + int gsi; + + rcu_read_lock(); + gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin]; + if (gsi != -1) + hlist_for_each_entry_rcu(kian, n, &kvm->irq_ack_notifier_list, + link) + if (kian->gsi == gsi) { + rcu_read_unlock(); + return true; + } + + rcu_read_unlock(); + + 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; @@ -261,6 +284,7 @@ void kvm_register_irq_ack_notifier(struct kvm *kvm, mutex_lock(&kvm->irq_lock); hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list); mutex_unlock(&kvm->irq_lock); + kvm_ioapic_make_eoibitmap_request(kvm); } void kvm_unregister_irq_ack_notifier(struct kvm *kvm, @@ -270,6 +294,7 @@ void kvm_unregister_irq_ack_notifier(struct kvm *kvm, hlist_del_init_rcu(&kian->link); mutex_unlock(&kvm->irq_lock); synchronize_rcu(); + kvm_ioapic_make_eoibitmap_request(kvm); } int kvm_request_irq_source_id(struct kvm *kvm) |