xics: Handle KVM ICS reset from the "simple" ICS code

The KVM ICS reset handler simply writes the ICS state to KVM. This
doesn't need the overkill parent_reset logic we have today. Also
we want to use the same ICS type for the KVM and non-KVM case with
pseries.

Call icp_set_kvm_state() from the "simple" ICS reset function.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <155023082407.1011724.1983100830860273401.stgit@bahia.lan>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/intc/xics.c

@@ -553,6 +553,10 @@ static void ics_simple_reset(DeviceState *dev)
     ICSStateClass *icsc = ICS_BASE_GET_CLASS(dev);
 
     icsc->parent_reset(dev);
+
+    if (kvm_irqchip_in_kernel()) {
+        ics_set_kvm_state(ICS_BASE(dev));
+    }
 }
 
 static void ics_simple_reset_handler(void *dev)

hw/intc/xics_kvm.c

@@ -280,20 +280,6 @@ void ics_kvm_set_irq(void *opaque, int srcno, int val)
     }
 }
 
-static void ics_kvm_reset(DeviceState *dev)
-{
-    ICSStateClass *icsc = ICS_BASE_GET_CLASS(dev);
-
-    icsc->parent_reset(dev);
-
-    ics_set_kvm_state(ICS_KVM(dev));
-}
-
-static void ics_kvm_reset_handler(void *dev)
-{
-    ics_kvm_reset(dev);
-}
-
 static void ics_kvm_realize(DeviceState *dev, Error **errp)
 {
     ICSState *ics = ICS_KVM(dev);
@@ -305,8 +291,6 @@ static void ics_kvm_realize(DeviceState *dev, Error **errp)
         error_propagate(errp, local_err);
         return;
     }
-
-    qemu_register_reset(ics_kvm_reset_handler, ics);
 }
 
 static void ics_kvm_class_init(ObjectClass *klass, void *data)
@@ -316,8 +300,6 @@ static void ics_kvm_class_init(ObjectClass *klass, void *data)
 
     device_class_set_parent_realize(dc, ics_kvm_realize,
                                     &icsc->parent_realize);
-    device_class_set_parent_reset(dc, ics_kvm_reset,
-                                  &icsc->parent_reset);
 }
 
 static const TypeInfo ics_kvm_info = {