cpu: Factor out cpu_generic_init()
[qemu.git] / qom / cpu.c
1 /*
2 * QEMU CPU model
3 *
4 * Copyright (c) 2012-2014 SUSE LINUX Products GmbH
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see
18 * <http://www.gnu.org/licenses/gpl-2.0.html>
19 */
20
21 #include "qemu-common.h"
22 #include "qom/cpu.h"
23 #include "sysemu/kvm.h"
24 #include "qemu/notify.h"
25 #include "qemu/log.h"
26 #include "qemu/error-report.h"
27 #include "sysemu/sysemu.h"
28
29 bool cpu_exists(int64_t id)
30 {
31 CPUState *cpu;
32
33 CPU_FOREACH(cpu) {
34 CPUClass *cc = CPU_GET_CLASS(cpu);
35
36 if (cc->get_arch_id(cpu) == id) {
37 return true;
38 }
39 }
40 return false;
41 }
42
43 CPUState *cpu_generic_init(const char *typename, const char *cpu_model)
44 {
45 char *str, *name, *featurestr;
46 CPUState *cpu;
47 ObjectClass *oc;
48 CPUClass *cc;
49 Error *err = NULL;
50
51 str = g_strdup(cpu_model);
52 name = strtok(str, ",");
53
54 oc = cpu_class_by_name(typename, name);
55 if (oc == NULL) {
56 g_free(str);
57 return NULL;
58 }
59
60 cpu = CPU(object_new(object_class_get_name(oc)));
61 cc = CPU_GET_CLASS(cpu);
62
63 featurestr = strtok(NULL, ",");
64 cc->parse_features(cpu, featurestr, &err);
65 g_free(str);
66 if (err != NULL) {
67 goto out;
68 }
69
70 object_property_set_bool(OBJECT(cpu), true, "realized", &err);
71
72 out:
73 if (err != NULL) {
74 error_report("%s", error_get_pretty(err));
75 error_free(err);
76 object_unref(OBJECT(cpu));
77 return NULL;
78 }
79
80 return cpu;
81 }
82
83 bool cpu_paging_enabled(const CPUState *cpu)
84 {
85 CPUClass *cc = CPU_GET_CLASS(cpu);
86
87 return cc->get_paging_enabled(cpu);
88 }
89
90 static bool cpu_common_get_paging_enabled(const CPUState *cpu)
91 {
92 return false;
93 }
94
95 void cpu_get_memory_mapping(CPUState *cpu, MemoryMappingList *list,
96 Error **errp)
97 {
98 CPUClass *cc = CPU_GET_CLASS(cpu);
99
100 return cc->get_memory_mapping(cpu, list, errp);
101 }
102
103 static void cpu_common_get_memory_mapping(CPUState *cpu,
104 MemoryMappingList *list,
105 Error **errp)
106 {
107 error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
108 }
109
110 /* CPU hot-plug notifiers */
111 static NotifierList cpu_added_notifiers =
112 NOTIFIER_LIST_INITIALIZER(cpu_add_notifiers);
113
114 void qemu_register_cpu_added_notifier(Notifier *notifier)
115 {
116 notifier_list_add(&cpu_added_notifiers, notifier);
117 }
118
119 void cpu_reset_interrupt(CPUState *cpu, int mask)
120 {
121 cpu->interrupt_request &= ~mask;
122 }
123
124 void cpu_exit(CPUState *cpu)
125 {
126 cpu->exit_request = 1;
127 cpu->tcg_exit_req = 1;
128 }
129
130 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
131 void *opaque)
132 {
133 CPUClass *cc = CPU_GET_CLASS(cpu);
134
135 return (*cc->write_elf32_qemunote)(f, cpu, opaque);
136 }
137
138 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
139 CPUState *cpu, void *opaque)
140 {
141 return -1;
142 }
143
144 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
145 int cpuid, void *opaque)
146 {
147 CPUClass *cc = CPU_GET_CLASS(cpu);
148
149 return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
150 }
151
152 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
153 CPUState *cpu, int cpuid,
154 void *opaque)
155 {
156 return -1;
157 }
158
159 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
160 void *opaque)
161 {
162 CPUClass *cc = CPU_GET_CLASS(cpu);
163
164 return (*cc->write_elf64_qemunote)(f, cpu, opaque);
165 }
166
167 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
168 CPUState *cpu, void *opaque)
169 {
170 return -1;
171 }
172
173 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
174 int cpuid, void *opaque)
175 {
176 CPUClass *cc = CPU_GET_CLASS(cpu);
177
178 return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
179 }
180
181 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
182 CPUState *cpu, int cpuid,
183 void *opaque)
184 {
185 return -1;
186 }
187
188
189 static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
190 {
191 return 0;
192 }
193
194 static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
195 {
196 return 0;
197 }
198
199
200 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
201 int flags)
202 {
203 CPUClass *cc = CPU_GET_CLASS(cpu);
204
205 if (cc->dump_state) {
206 cpu_synchronize_state(cpu);
207 cc->dump_state(cpu, f, cpu_fprintf, flags);
208 }
209 }
210
211 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
212 int flags)
213 {
214 CPUClass *cc = CPU_GET_CLASS(cpu);
215
216 if (cc->dump_statistics) {
217 cc->dump_statistics(cpu, f, cpu_fprintf, flags);
218 }
219 }
220
221 void cpu_reset(CPUState *cpu)
222 {
223 CPUClass *klass = CPU_GET_CLASS(cpu);
224
225 if (klass->reset != NULL) {
226 (*klass->reset)(cpu);
227 }
228 }
229
230 static void cpu_common_reset(CPUState *cpu)
231 {
232 CPUClass *cc = CPU_GET_CLASS(cpu);
233
234 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
235 qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
236 log_cpu_state(cpu, cc->reset_dump_flags);
237 }
238
239 cpu->interrupt_request = 0;
240 cpu->current_tb = NULL;
241 cpu->halted = 0;
242 }
243
244 static bool cpu_common_has_work(CPUState *cs)
245 {
246 return false;
247 }
248
249 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
250 {
251 CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
252
253 return cc->class_by_name(cpu_model);
254 }
255
256 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
257 {
258 return NULL;
259 }
260
261 static void cpu_common_parse_features(CPUState *cpu, char *features,
262 Error **errp)
263 {
264 char *featurestr; /* Single "key=value" string being parsed */
265 char *val;
266 Error *err = NULL;
267
268 featurestr = features ? strtok(features, ",") : NULL;
269
270 while (featurestr) {
271 val = strchr(featurestr, '=');
272 if (val) {
273 *val = 0;
274 val++;
275 object_property_parse(OBJECT(cpu), val, featurestr, &err);
276 if (err) {
277 error_propagate(errp, err);
278 return;
279 }
280 } else {
281 error_setg(errp, "Expected key=value format, found %s.",
282 featurestr);
283 return;
284 }
285 featurestr = strtok(NULL, ",");
286 }
287 }
288
289 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
290 {
291 CPUState *cpu = CPU(dev);
292
293 if (dev->hotplugged) {
294 cpu_synchronize_post_init(cpu);
295 notifier_list_notify(&cpu_added_notifiers, dev);
296 cpu_resume(cpu);
297 }
298 }
299
300 static void cpu_common_initfn(Object *obj)
301 {
302 CPUState *cpu = CPU(obj);
303 CPUClass *cc = CPU_GET_CLASS(obj);
304
305 cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
306 }
307
308 static int64_t cpu_common_get_arch_id(CPUState *cpu)
309 {
310 return cpu->cpu_index;
311 }
312
313 static void cpu_class_init(ObjectClass *klass, void *data)
314 {
315 DeviceClass *dc = DEVICE_CLASS(klass);
316 CPUClass *k = CPU_CLASS(klass);
317
318 k->class_by_name = cpu_common_class_by_name;
319 k->parse_features = cpu_common_parse_features;
320 k->reset = cpu_common_reset;
321 k->get_arch_id = cpu_common_get_arch_id;
322 k->has_work = cpu_common_has_work;
323 k->get_paging_enabled = cpu_common_get_paging_enabled;
324 k->get_memory_mapping = cpu_common_get_memory_mapping;
325 k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
326 k->write_elf32_note = cpu_common_write_elf32_note;
327 k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
328 k->write_elf64_note = cpu_common_write_elf64_note;
329 k->gdb_read_register = cpu_common_gdb_read_register;
330 k->gdb_write_register = cpu_common_gdb_write_register;
331 dc->realize = cpu_common_realizefn;
332 /*
333 * Reason: CPUs still need special care by board code: wiring up
334 * IRQs, adding reset handlers, halting non-first CPUs, ...
335 */
336 dc->cannot_instantiate_with_device_add_yet = true;
337 }
338
339 static const TypeInfo cpu_type_info = {
340 .name = TYPE_CPU,
341 .parent = TYPE_DEVICE,
342 .instance_size = sizeof(CPUState),
343 .instance_init = cpu_common_initfn,
344 .abstract = true,
345 .class_size = sizeof(CPUClass),
346 .class_init = cpu_class_init,
347 };
348
349 static void cpu_register_types(void)
350 {
351 type_register_static(&cpu_type_info);
352 }
353
354 type_init(cpu_register_types)