KVM: Move irq notifier implementation into eventfd.c

This moves the functions kvm_irq_has_notifier(), kvm_notify_acked_irq(),
kvm_register_irq_ack_notifier() and kvm_unregister_irq_ack_notifier()
from irqchip.c to eventfd.c.  The reason for doing this is that those
functions are used in connection with IRQFDs, which are implemented in
eventfd.c.  In future we will want to use IRQFDs on platforms that
don't implement the GSI routing implemented in irqchip.c, so we won't
be compiling in irqchip.c, but we still need the irq notifiers.  The
implementation is unchanged.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index f0075ffb0c35d1585569e0e7932abbd843367374..99957df69cf2962746db3488ea3d43ec4d10f679 100644 (file)
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -34,7 +34,9 @@
 #include <linux/srcu.h>
 #include <linux/slab.h>
 #include <linux/seqlock.h>
+#include <trace/events/kvm.h>
 
+#include "irq.h"
 #include "iodev.h"
 
 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
@@ -865,3 +867,64 @@ 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/irqchip.c b/virt/kvm/irqchip.c
index 04faac50cef5f89bcfccee9c33377ca767abc786..7f256f31df102e36da59a8ebed636f1c9615cb00 100644 (file)
--- a/virt/kvm/irqchip.c
+++ b/virt/kvm/irqchip.c
@@ -69,67 +69,6 @@ int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
        return irq_rt->chip[irqchip][pin];
 }
 
-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
-}
-
 int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi)
 {
        struct kvm_kernel_irq_routing_entry route;