i8259: Convert PICCommonState to use QOM realizefn

Instead of having the parent provide PICCommonClass::init,
let the children override DeviceClass::realize themselves.
This pushes the responsibility of saving and calling the parent's
realizefn to the children.

Signed-off-by: Andreas Färber <afaerber@suse.de>

1 files changed, 24 insertions, 2 deletions

diff --git a/hw/i386/kvm/i8259.c b/hw/i386/kvm/i8259.c
index 0bfbe34c86..125022422a 100644
--- a/hw/i386/kvm/i8259.c
+++ b/hw/i386/kvm/i8259.c
@@ -14,6 +14,20 @@
 #include "sysemu/kvm.h"
 
 #define TYPE_KVM_I8259 "kvm-i8259"
+#define KVM_PIC_CLASS(class) \
+    OBJECT_CLASS_CHECK(KVMPICClass, (class), TYPE_KVM_I8259)
+#define KVM_PIC_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(KVMPICClass, (obj), TYPE_KVM_I8259)
+
+/**
+ * KVMPICClass:
+ * @parent_realize: The parent's realizefn.
+ */
+typedef struct KVMPICClass {
+    PICCommonClass parent_class;
+
+    DeviceRealize parent_realize;
+} KVMPICClass;
 
 static void kvm_pic_get(PICCommonState *s)
 {
@@ -100,10 +114,15 @@ static void kvm_pic_set_irq(void *opaque, int irq, int level)
     apic_report_irq_delivered(delivered);
 }
 
-static void kvm_pic_init(PICCommonState *s)
+static void kvm_pic_realize(DeviceState *dev, Error **errp)
 {
+    PICCommonState *s = PIC_COMMON(dev);
+    KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev);
+
     memory_region_init_reservation(&s->base_io, "kvm-pic", 2);
     memory_region_init_reservation(&s->elcr_io, "kvm-elcr", 1);
+
+    kpc->parent_realize(dev, errp);
 }
 
 qemu_irq *kvm_i8259_init(ISABus *bus)
@@ -116,11 +135,13 @@ qemu_irq *kvm_i8259_init(ISABus *bus)
 
 static void kvm_i8259_class_init(ObjectClass *klass, void *data)
 {
+    KVMPICClass *kpc = KVM_PIC_CLASS(klass);
     PICCommonClass *k = PIC_COMMON_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
 
     dc->reset     = kvm_pic_reset;
-    k->init       = kvm_pic_init;
+    kpc->parent_realize = dc->realize;
+    dc->realize   = kvm_pic_realize;
     k->pre_save   = kvm_pic_get;
     k->post_load  = kvm_pic_put;
 }
@@ -130,6 +151,7 @@ static const TypeInfo kvm_i8259_info = {
     .parent = TYPE_PIC_COMMON,
     .instance_size = sizeof(PICCommonState),
     .class_init = kvm_i8259_class_init,
+    .class_size = sizeof(KVMPICClass),
 };
 
 static void kvm_pic_register_types(void)