kvm/eventfd: factor out kvm_notify_acked_gsi()

Factor out kvm_notify_acked_gsi() helper to iterate over EOI listeners
and notify those matching the given gsi.

It will be reused in the upcoming Hyper-V SynIC implementation.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 11 insertions, 5 deletions

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 518421e65b0d..f6b986a41823 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -451,9 +451,18 @@ bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin)
 }
 EXPORT_SYMBOL_GPL(kvm_irq_has_notifier);
 
-void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
+void kvm_notify_acked_gsi(struct kvm *kvm, int gsi)
 {
         struct kvm_irq_ack_notifier *kian;
+
+        hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list,
+                                 link)
+                if (kian->gsi == gsi)
+                        kian->irq_acked(kian);
+}
+
+void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
+{
         int gsi, idx;
 
         trace_kvm_ack_irq(irqchip, pin);
@@ -461,10 +470,7 @@ void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned 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);
+                kvm_notify_acked_gsi(kvm, gsi);
         srcu_read_unlock(&kvm->irq_srcu, idx);
 }