xics: Create sPAPR specific ICS subtype

We create a subtype of TYPE_ICS specifically for sPAPR.  For now all this
does is move the setup of the PAPR specific hcalls and RTAS calls to
the realize() function for this, rather than requiring the PAPR code to
explicitly call xics_spapr_init().  In future it will have some more
function.

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

hw/intc/xics_spapr.c

@@ -283,8 +283,18 @@ static void rtas_int_on(PowerPCCPU *cpu, SpaprMachineState *spapr,
     rtas_st(rets, 0, RTAS_OUT_SUCCESS);
 }
 
-void xics_spapr_init(SpaprMachineState *spapr)
+static void ics_spapr_realize(DeviceState *dev, Error **errp)
 {
+    ICSState *ics = ICS_SPAPR(dev);
+    ICSStateClass *icsc = ICS_GET_CLASS(ics);
+    Error *local_err = NULL;
+
+    icsc->parent_realize(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
     spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_set_xive);
     spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_get_xive);
     spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_int_off);
@@ -319,3 +329,25 @@ void spapr_dt_xics(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
     _FDT(fdt_setprop_cell(fdt, node, "linux,phandle", phandle));
     _FDT(fdt_setprop_cell(fdt, node, "phandle", phandle));
 }
+
+static void ics_spapr_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    ICSStateClass *isc = ICS_CLASS(klass);
+
+    device_class_set_parent_realize(dc, ics_spapr_realize,
+                                    &isc->parent_realize);
+}
+
+static const TypeInfo ics_spapr_info = {
+    .name = TYPE_ICS_SPAPR,
+    .parent = TYPE_ICS,
+    .class_init = ics_spapr_class_init,
+};
+
+static void xics_spapr_register_types(void)
+{
+    type_register_static(&ics_spapr_info);
+}
+
+type_init(xics_spapr_register_types)

hw/ppc/spapr_irq.c

@@ -98,7 +98,7 @@ static void spapr_irq_init_xics(SpaprMachineState *spapr, int nr_irqs,
     Object *obj;
     Error *local_err = NULL;
 
-    obj = object_new(TYPE_ICS);
+    obj = object_new(TYPE_ICS_SPAPR);
     object_property_add_child(OBJECT(spapr), "ics", obj, &error_abort);
     object_property_add_const_link(obj, ICS_PROP_XICS, OBJECT(spapr),
                                    &error_fatal);
@@ -109,9 +109,7 @@ static void spapr_irq_init_xics(SpaprMachineState *spapr, int nr_irqs,
         return;
     }
 
-    spapr->ics = ICS(obj);
-
-    xics_spapr_init(spapr);
+    spapr->ics = ICS_SPAPR(obj);
 }
 
 static int spapr_irq_claim_xics(SpaprMachineState *spapr, int irq, bool lsi,

include/hw/ppc/xics_spapr.h

@@ -31,11 +31,13 @@
 
 #define XICS_NODENAME "interrupt-controller"
 
+#define TYPE_ICS_SPAPR "ics-spapr"
+#define ICS_SPAPR(obj) OBJECT_CHECK(ICSState, (obj), TYPE_ICS_SPAPR)
+
 void spapr_dt_xics(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
                    uint32_t phandle);
 int xics_kvm_connect(SpaprMachineState *spapr, Error **errp);
 void xics_kvm_disconnect(SpaprMachineState *spapr, Error **errp);
 bool xics_kvm_has_broken_disconnect(SpaprMachineState *spapr);
-void xics_spapr_init(SpaprMachineState *spapr);
 
 #endif /* XICS_SPAPR_H */