seccomp: whitelist syscalls fallocate(), fadvise64(), inotify_init1() and inotify_add...
[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 void cpu_reset_interrupt(CPUState *cpu, int mask)
111 {
112 cpu->interrupt_request &= ~mask;
113 }
114
115 void cpu_exit(CPUState *cpu)
116 {
117 cpu->exit_request = 1;
118 cpu->tcg_exit_req = 1;
119 }
120
121 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
122 void *opaque)
123 {
124 CPUClass *cc = CPU_GET_CLASS(cpu);
125
126 return (*cc->write_elf32_qemunote)(f, cpu, opaque);
127 }
128
129 static int cpu_common_write_elf32_qemunote(WriteCoreDumpFunction f,
130 CPUState *cpu, void *opaque)
131 {
132 return -1;
133 }
134
135 int cpu_write_elf32_note(WriteCoreDumpFunction f, CPUState *cpu,
136 int cpuid, void *opaque)
137 {
138 CPUClass *cc = CPU_GET_CLASS(cpu);
139
140 return (*cc->write_elf32_note)(f, cpu, cpuid, opaque);
141 }
142
143 static int cpu_common_write_elf32_note(WriteCoreDumpFunction f,
144 CPUState *cpu, int cpuid,
145 void *opaque)
146 {
147 return -1;
148 }
149
150 int cpu_write_elf64_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
151 void *opaque)
152 {
153 CPUClass *cc = CPU_GET_CLASS(cpu);
154
155 return (*cc->write_elf64_qemunote)(f, cpu, opaque);
156 }
157
158 static int cpu_common_write_elf64_qemunote(WriteCoreDumpFunction f,
159 CPUState *cpu, void *opaque)
160 {
161 return -1;
162 }
163
164 int cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cpu,
165 int cpuid, void *opaque)
166 {
167 CPUClass *cc = CPU_GET_CLASS(cpu);
168
169 return (*cc->write_elf64_note)(f, cpu, cpuid, opaque);
170 }
171
172 static int cpu_common_write_elf64_note(WriteCoreDumpFunction f,
173 CPUState *cpu, int cpuid,
174 void *opaque)
175 {
176 return -1;
177 }
178
179
180 static int cpu_common_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg)
181 {
182 return 0;
183 }
184
185 static int cpu_common_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg)
186 {
187 return 0;
188 }
189
190 bool target_words_bigendian(void);
191 static bool cpu_common_virtio_is_big_endian(CPUState *cpu)
192 {
193 return target_words_bigendian();
194 }
195
196 static void cpu_common_noop(CPUState *cpu)
197 {
198 }
199
200 static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
201 {
202 return false;
203 }
204
205 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
206 int flags)
207 {
208 CPUClass *cc = CPU_GET_CLASS(cpu);
209
210 if (cc->dump_state) {
211 cpu_synchronize_state(cpu);
212 cc->dump_state(cpu, f, cpu_fprintf, flags);
213 }
214 }
215
216 void cpu_dump_statistics(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
217 int flags)
218 {
219 CPUClass *cc = CPU_GET_CLASS(cpu);
220
221 if (cc->dump_statistics) {
222 cc->dump_statistics(cpu, f, cpu_fprintf, flags);
223 }
224 }
225
226 void cpu_reset(CPUState *cpu)
227 {
228 CPUClass *klass = CPU_GET_CLASS(cpu);
229
230 if (klass->reset != NULL) {
231 (*klass->reset)(cpu);
232 }
233 }
234
235 static void cpu_common_reset(CPUState *cpu)
236 {
237 CPUClass *cc = CPU_GET_CLASS(cpu);
238
239 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
240 qemu_log("CPU Reset (CPU %d)\n", cpu->cpu_index);
241 log_cpu_state(cpu, cc->reset_dump_flags);
242 }
243
244 cpu->interrupt_request = 0;
245 cpu->current_tb = NULL;
246 cpu->halted = 0;
247 cpu->mem_io_pc = 0;
248 cpu->mem_io_vaddr = 0;
249 cpu->icount_extra = 0;
250 cpu->icount_decr.u32 = 0;
251 cpu->can_do_io = 0;
252 memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
253 }
254
255 static bool cpu_common_has_work(CPUState *cs)
256 {
257 return false;
258 }
259
260 ObjectClass *cpu_class_by_name(const char *typename, const char *cpu_model)
261 {
262 CPUClass *cc = CPU_CLASS(object_class_by_name(typename));
263
264 return cc->class_by_name(cpu_model);
265 }
266
267 static ObjectClass *cpu_common_class_by_name(const char *cpu_model)
268 {
269 return NULL;
270 }
271
272 static void cpu_common_parse_features(CPUState *cpu, char *features,
273 Error **errp)
274 {
275 char *featurestr; /* Single "key=value" string being parsed */
276 char *val;
277 Error *err = NULL;
278
279 featurestr = features ? strtok(features, ",") : NULL;
280
281 while (featurestr) {
282 val = strchr(featurestr, '=');
283 if (val) {
284 *val = 0;
285 val++;
286 object_property_parse(OBJECT(cpu), val, featurestr, &err);
287 if (err) {
288 error_propagate(errp, err);
289 return;
290 }
291 } else {
292 error_setg(errp, "Expected key=value format, found %s.",
293 featurestr);
294 return;
295 }
296 featurestr = strtok(NULL, ",");
297 }
298 }
299
300 static void cpu_common_realizefn(DeviceState *dev, Error **errp)
301 {
302 CPUState *cpu = CPU(dev);
303
304 if (dev->hotplugged) {
305 cpu_synchronize_post_init(cpu);
306 cpu_resume(cpu);
307 }
308 }
309
310 static void cpu_common_initfn(Object *obj)
311 {
312 CPUState *cpu = CPU(obj);
313 CPUClass *cc = CPU_GET_CLASS(obj);
314
315 cpu->gdb_num_regs = cpu->gdb_num_g_regs = cc->gdb_num_core_regs;
316 }
317
318 static int64_t cpu_common_get_arch_id(CPUState *cpu)
319 {
320 return cpu->cpu_index;
321 }
322
323 static void cpu_class_init(ObjectClass *klass, void *data)
324 {
325 DeviceClass *dc = DEVICE_CLASS(klass);
326 CPUClass *k = CPU_CLASS(klass);
327
328 k->class_by_name = cpu_common_class_by_name;
329 k->parse_features = cpu_common_parse_features;
330 k->reset = cpu_common_reset;
331 k->get_arch_id = cpu_common_get_arch_id;
332 k->has_work = cpu_common_has_work;
333 k->get_paging_enabled = cpu_common_get_paging_enabled;
334 k->get_memory_mapping = cpu_common_get_memory_mapping;
335 k->write_elf32_qemunote = cpu_common_write_elf32_qemunote;
336 k->write_elf32_note = cpu_common_write_elf32_note;
337 k->write_elf64_qemunote = cpu_common_write_elf64_qemunote;
338 k->write_elf64_note = cpu_common_write_elf64_note;
339 k->gdb_read_register = cpu_common_gdb_read_register;
340 k->gdb_write_register = cpu_common_gdb_write_register;
341 k->virtio_is_big_endian = cpu_common_virtio_is_big_endian;
342 k->debug_excp_handler = cpu_common_noop;
343 k->cpu_exec_enter = cpu_common_noop;
344 k->cpu_exec_exit = cpu_common_noop;
345 k->cpu_exec_interrupt = cpu_common_exec_interrupt;
346 dc->realize = cpu_common_realizefn;
347 /*
348 * Reason: CPUs still need special care by board code: wiring up
349 * IRQs, adding reset handlers, halting non-first CPUs, ...
350 */
351 dc->cannot_instantiate_with_device_add_yet = true;
352 }
353
354 static const TypeInfo cpu_type_info = {
355 .name = TYPE_CPU,
356 .parent = TYPE_DEVICE,
357 .instance_size = sizeof(CPUState),
358 .instance_init = cpu_common_initfn,
359 .abstract = true,
360 .class_size = sizeof(CPUClass),
361 .class_init = cpu_class_init,
362 };
363
364 static void cpu_register_types(void)
365 {
366 type_register_static(&cpu_type_info);
367 }
368
369 type_init(cpu_register_types)