hw/arm/bcm2836: Only provide "enabled-cpus" property to multicore SoCs
[qemu.git] / hw / s390x / ap-bridge.c
1 /*
2 * ap bridge
3 *
4 * Copyright 2018 IBM Corp.
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or (at
7 * your option) any later version. See the COPYING file in the top-level
8 * directory.
9 */
10
11 #include "qemu/osdep.h"
12 #include "qapi/error.h"
13 #include "hw/sysbus.h"
14 #include "qemu/bitops.h"
15 #include "qemu/module.h"
16 #include "hw/s390x/ap-bridge.h"
17 #include "cpu.h"
18
19 static char *ap_bus_get_dev_path(DeviceState *dev)
20 {
21 /* at most one */
22 return g_strdup_printf("/1");
23 }
24
25 static void ap_bus_class_init(ObjectClass *oc, void *data)
26 {
27 BusClass *k = BUS_CLASS(oc);
28
29 k->get_dev_path = ap_bus_get_dev_path;
30 /* More than one ap device does not make sense */
31 k->max_dev = 1;
32 }
33
34 static const TypeInfo ap_bus_info = {
35 .name = TYPE_AP_BUS,
36 .parent = TYPE_BUS,
37 .instance_size = 0,
38 .class_init = ap_bus_class_init,
39 };
40
41 void s390_init_ap(void)
42 {
43 DeviceState *dev;
44 BusState *bus;
45
46 /* If no AP instructions then no need for AP bridge */
47 if (!s390_has_feat(S390_FEAT_AP)) {
48 return;
49 }
50
51 /* Create bridge device */
52 dev = qdev_new(TYPE_AP_BRIDGE);
53 object_property_add_child(qdev_get_machine(), TYPE_AP_BRIDGE,
54 OBJECT(dev));
55 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
56
57 /* Create bus on bridge device */
58 bus = qbus_create(TYPE_AP_BUS, dev, TYPE_AP_BUS);
59
60 /* Enable hotplugging */
61 qbus_set_hotplug_handler(bus, OBJECT(dev));
62 }
63
64 static void ap_bridge_class_init(ObjectClass *oc, void *data)
65 {
66 DeviceClass *dc = DEVICE_CLASS(oc);
67 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc);
68
69 hc->unplug = qdev_simple_device_unplug_cb;
70 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
71 }
72
73 static const TypeInfo ap_bridge_info = {
74 .name = TYPE_AP_BRIDGE,
75 .parent = TYPE_SYS_BUS_DEVICE,
76 .instance_size = 0,
77 .class_init = ap_bridge_class_init,
78 .interfaces = (InterfaceInfo[]) {
79 { TYPE_HOTPLUG_HANDLER },
80 { }
81 }
82 };
83
84 static void ap_register(void)
85 {
86 type_register_static(&ap_bridge_info);
87 type_register_static(&ap_bus_info);
88 }
89
90 type_init(ap_register)