xref: /openbmc/qemu/hw/cpu/core.c (revision 2c9728c0)
1 /*
2  * CPU core abstract device
3  *
4  * Copyright (C) 2016 Bharata B Rao <bharata@linux.vnet.ibm.com>
5  *
6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
7  * See the COPYING file in the top-level directory.
8  */
9 
10 #include "qemu/osdep.h"
11 #include "hw/cpu/core.h"
12 #include "qapi/visitor.h"
13 #include "qemu/module.h"
14 #include "qapi/error.h"
15 #include "sysemu/cpus.h"
16 #include "hw/boards.h"
17 
18 static void core_prop_get_core_id(Object *obj, Visitor *v, const char *name,
19                                   void *opaque, Error **errp)
20 {
21     CPUCore *core = CPU_CORE(obj);
22     int64_t value = core->core_id;
23 
24     visit_type_int(v, name, &value, errp);
25 }
26 
27 static void core_prop_set_core_id(Object *obj, Visitor *v, const char *name,
28                                   void *opaque, Error **errp)
29 {
30     CPUCore *core = CPU_CORE(obj);
31     int64_t value;
32 
33     if (!visit_type_int(v, name, &value, errp)) {
34         return;
35     }
36 
37     if (value < 0) {
38         error_setg(errp, "Invalid core id %"PRId64, value);
39         return;
40     }
41 
42     core->core_id = value;
43 }
44 
45 static void core_prop_get_nr_threads(Object *obj, Visitor *v, const char *name,
46                                      void *opaque, Error **errp)
47 {
48     CPUCore *core = CPU_CORE(obj);
49     int64_t value = core->nr_threads;
50 
51     visit_type_int(v, name, &value, errp);
52 }
53 
54 static void core_prop_set_nr_threads(Object *obj, Visitor *v, const char *name,
55                                      void *opaque, Error **errp)
56 {
57     CPUCore *core = CPU_CORE(obj);
58     int64_t value;
59 
60     if (!visit_type_int(v, name, &value, errp)) {
61         return;
62     }
63 
64     core->nr_threads = value;
65 }
66 
67 static void cpu_core_instance_init(Object *obj)
68 {
69     MachineState *ms = MACHINE(qdev_get_machine());
70     CPUCore *core = CPU_CORE(obj);
71 
72     object_property_add(obj, "core-id", "int", core_prop_get_core_id,
73                         core_prop_set_core_id, NULL, NULL);
74     object_property_add(obj, "nr-threads", "int", core_prop_get_nr_threads,
75                         core_prop_set_nr_threads, NULL, NULL);
76     core->nr_threads = ms->smp.threads;
77 }
78 
79 static void cpu_core_class_init(ObjectClass *oc, void *data)
80 {
81     DeviceClass *dc = DEVICE_CLASS(oc);
82 
83     set_bit(DEVICE_CATEGORY_CPU, dc->categories);
84 }
85 
86 static const TypeInfo cpu_core_type_info = {
87     .name = TYPE_CPU_CORE,
88     .parent = TYPE_DEVICE,
89     .abstract = true,
90     .class_init = cpu_core_class_init,
91     .instance_size = sizeof(CPUCore),
92     .instance_init = cpu_core_instance_init,
93 };
94 
95 static void cpu_core_register_types(void)
96 {
97     type_register_static(&cpu_core_type_info);
98 }
99 
100 type_init(cpu_core_register_types)
101