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>

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 9596a2f0977b06105e52f8d30473979c00c4fee1..b66861c297c4dec9a6ee5cb1464a2d5c77ede12f 100644 (file)
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -829,6 +829,7 @@ int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level)
 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
                int irq_source_id, int level, bool line_status);
 bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin);
+void kvm_notify_acked_gsi(struct kvm *kvm, int gsi);
 void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
 void kvm_register_irq_ack_notifier(struct kvm *kvm,
                                   struct kvm_irq_ack_notifier *kian);

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 518421e65b0d16dd90fc1fdfe1613dd7aef1cc45..f6b986a418230de0eedee403a9be2b368f6ba6c7 100644 (file)
--- 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);
 }