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Commit | Line | Data |
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d9f24bf5 PB |
1 | /* |
2 | * Target-specific parts of the CPU object | |
3 | * | |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library 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 GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
d9f24bf5 PB |
21 | #include "qapi/error.h" |
22 | ||
23 | #include "exec/target_page.h" | |
24 | #include "hw/qdev-core.h" | |
25 | #include "hw/qdev-properties.h" | |
26 | #include "qemu/error-report.h" | |
dfa47531 | 27 | #include "qemu/qemu-print.h" |
d9f24bf5 PB |
28 | #include "migration/vmstate.h" |
29 | #ifdef CONFIG_USER_ONLY | |
30 | #include "qemu.h" | |
31 | #else | |
8b80bd28 | 32 | #include "hw/core/sysemu-cpu-ops.h" |
d9f24bf5 | 33 | #include "exec/address-spaces.h" |
5f8d88bd | 34 | #include "exec/memory.h" |
d9f24bf5 | 35 | #endif |
412ae126 | 36 | #include "sysemu/cpus.h" |
d9f24bf5 | 37 | #include "sysemu/tcg.h" |
42508261 | 38 | #include "exec/tswap.h" |
5b5968c4 | 39 | #include "exec/replay-core.h" |
377bf6f3 | 40 | #include "exec/cpu-common.h" |
3b04508c | 41 | #include "exec/exec-all.h" |
548c9609 | 42 | #include "exec/tb-flush.h" |
3b9bd3f4 | 43 | #include "exec/translate-all.h" |
d9f24bf5 | 44 | #include "exec/log.h" |
30565f10 | 45 | #include "hw/core/accel-cpu.h" |
ad1a706f | 46 | #include "trace/trace-root.h" |
3b04508c | 47 | #include "qemu/accel.h" |
d9f24bf5 | 48 | |
d9f24bf5 PB |
49 | #ifndef CONFIG_USER_ONLY |
50 | static int cpu_common_post_load(void *opaque, int version_id) | |
51 | { | |
52 | CPUState *cpu = opaque; | |
53 | ||
54 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the | |
55 | version_id is increased. */ | |
56 | cpu->interrupt_request &= ~0x01; | |
57 | tlb_flush(cpu); | |
58 | ||
59 | /* loadvm has just updated the content of RAM, bypassing the | |
60 | * usual mechanisms that ensure we flush TBs for writes to | |
61 | * memory we've translated code from. So we must flush all TBs, | |
62 | * which will now be stale. | |
63 | */ | |
64 | tb_flush(cpu); | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | static int cpu_common_pre_load(void *opaque) | |
70 | { | |
71 | CPUState *cpu = opaque; | |
72 | ||
73 | cpu->exception_index = -1; | |
74 | ||
75 | return 0; | |
76 | } | |
77 | ||
78 | static bool cpu_common_exception_index_needed(void *opaque) | |
79 | { | |
80 | CPUState *cpu = opaque; | |
81 | ||
82 | return tcg_enabled() && cpu->exception_index != -1; | |
83 | } | |
84 | ||
85 | static const VMStateDescription vmstate_cpu_common_exception_index = { | |
86 | .name = "cpu_common/exception_index", | |
87 | .version_id = 1, | |
88 | .minimum_version_id = 1, | |
89 | .needed = cpu_common_exception_index_needed, | |
ee1381ce | 90 | .fields = (const VMStateField[]) { |
d9f24bf5 PB |
91 | VMSTATE_INT32(exception_index, CPUState), |
92 | VMSTATE_END_OF_LIST() | |
93 | } | |
94 | }; | |
95 | ||
96 | static bool cpu_common_crash_occurred_needed(void *opaque) | |
97 | { | |
98 | CPUState *cpu = opaque; | |
99 | ||
100 | return cpu->crash_occurred; | |
101 | } | |
102 | ||
103 | static const VMStateDescription vmstate_cpu_common_crash_occurred = { | |
104 | .name = "cpu_common/crash_occurred", | |
105 | .version_id = 1, | |
106 | .minimum_version_id = 1, | |
107 | .needed = cpu_common_crash_occurred_needed, | |
ee1381ce | 108 | .fields = (const VMStateField[]) { |
d9f24bf5 PB |
109 | VMSTATE_BOOL(crash_occurred, CPUState), |
110 | VMSTATE_END_OF_LIST() | |
111 | } | |
112 | }; | |
113 | ||
114 | const VMStateDescription vmstate_cpu_common = { | |
115 | .name = "cpu_common", | |
116 | .version_id = 1, | |
117 | .minimum_version_id = 1, | |
118 | .pre_load = cpu_common_pre_load, | |
119 | .post_load = cpu_common_post_load, | |
ee1381ce | 120 | .fields = (const VMStateField[]) { |
d9f24bf5 PB |
121 | VMSTATE_UINT32(halted, CPUState), |
122 | VMSTATE_UINT32(interrupt_request, CPUState), | |
123 | VMSTATE_END_OF_LIST() | |
124 | }, | |
ee1381ce | 125 | .subsections = (const VMStateDescription * const []) { |
d9f24bf5 PB |
126 | &vmstate_cpu_common_exception_index, |
127 | &vmstate_cpu_common_crash_occurred, | |
128 | NULL | |
129 | } | |
130 | }; | |
131 | #endif | |
132 | ||
79a99091 | 133 | bool cpu_exec_realizefn(CPUState *cpu, Error **errp) |
d9f24bf5 | 134 | { |
6fbdff87 AB |
135 | /* cache the cpu class for the hotpath */ |
136 | cpu->cc = CPU_GET_CLASS(cpu); | |
d9f24bf5 | 137 | |
bd684b2f | 138 | if (!accel_cpu_common_realize(cpu, errp)) { |
79a99091 | 139 | return false; |
9ea057dc | 140 | } |
4e4fa6c1 | 141 | |
4e4fa6c1 RH |
142 | /* Wait until cpu initialization complete before exposing cpu. */ |
143 | cpu_list_add(cpu); | |
144 | ||
7df5e3d6 | 145 | #ifdef CONFIG_USER_ONLY |
4336073b PMD |
146 | assert(qdev_get_vmsd(DEVICE(cpu)) == NULL || |
147 | qdev_get_vmsd(DEVICE(cpu))->unmigratable); | |
7df5e3d6 CF |
148 | #else |
149 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { | |
150 | vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu); | |
151 | } | |
6fbdff87 AB |
152 | if (cpu->cc->sysemu_ops->legacy_vmsd != NULL) { |
153 | vmstate_register(NULL, cpu->cpu_index, cpu->cc->sysemu_ops->legacy_vmsd, cpu); | |
7df5e3d6 CF |
154 | } |
155 | #endif /* CONFIG_USER_ONLY */ | |
79a99091 PMD |
156 | |
157 | return true; | |
7df5e3d6 CF |
158 | } |
159 | ||
160 | void cpu_exec_unrealizefn(CPUState *cpu) | |
161 | { | |
feece4d0 | 162 | #ifndef CONFIG_USER_ONLY |
7df5e3d6 | 163 | CPUClass *cc = CPU_GET_CLASS(cpu); |
d9f24bf5 | 164 | |
feece4d0 PMD |
165 | if (cc->sysemu_ops->legacy_vmsd != NULL) { |
166 | vmstate_unregister(NULL, cc->sysemu_ops->legacy_vmsd, cpu); | |
d9f24bf5 PB |
167 | } |
168 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { | |
169 | vmstate_unregister(NULL, &vmstate_cpu_common, cpu); | |
170 | } | |
d9f24bf5 | 171 | #endif |
4731f89b | 172 | |
7df5e3d6 | 173 | cpu_list_remove(cpu); |
4731f89b EC |
174 | /* |
175 | * Now that the vCPU has been removed from the RCU list, we can call | |
1aa1d830 | 176 | * accel_cpu_common_unrealize, which may free fields using call_rcu. |
4731f89b | 177 | */ |
1aa1d830 | 178 | accel_cpu_common_unrealize(cpu); |
d9f24bf5 PB |
179 | } |
180 | ||
6e8dcacd RH |
181 | /* |
182 | * This can't go in hw/core/cpu.c because that file is compiled only | |
183 | * once for both user-mode and system builds. | |
184 | */ | |
995b87de | 185 | static Property cpu_common_props[] = { |
6e8dcacd RH |
186 | #ifdef CONFIG_USER_ONLY |
187 | /* | |
188 | * Create a property for the user-only object, so users can | |
189 | * adjust prctl(PR_SET_UNALIGN) from the command-line. | |
190 | * Has no effect if the target does not support the feature. | |
191 | */ | |
192 | DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState, | |
193 | prctl_unalign_sigbus, false), | |
194 | #else | |
995b87de | 195 | /* |
54b99122 | 196 | * Create a memory property for system CPU object, so users can |
6e8dcacd | 197 | * wire up its memory. The default if no link is set up is to use |
995b87de RH |
198 | * the system address space. |
199 | */ | |
200 | DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION, | |
201 | MemoryRegion *), | |
202 | #endif | |
995b87de RH |
203 | DEFINE_PROP_END_OF_LIST(), |
204 | }; | |
205 | ||
0f9237f4 | 206 | #ifndef CONFIG_USER_ONLY |
0c3c25fc PM |
207 | static bool cpu_get_start_powered_off(Object *obj, Error **errp) |
208 | { | |
209 | CPUState *cpu = CPU(obj); | |
210 | return cpu->start_powered_off; | |
211 | } | |
212 | ||
213 | static void cpu_set_start_powered_off(Object *obj, bool value, Error **errp) | |
214 | { | |
215 | CPUState *cpu = CPU(obj); | |
216 | cpu->start_powered_off = value; | |
217 | } | |
0f9237f4 | 218 | #endif |
0c3c25fc | 219 | |
995b87de RH |
220 | void cpu_class_init_props(DeviceClass *dc) |
221 | { | |
0f9237f4 | 222 | #ifndef CONFIG_USER_ONLY |
0c3c25fc PM |
223 | ObjectClass *oc = OBJECT_CLASS(dc); |
224 | ||
0c3c25fc PM |
225 | /* |
226 | * We can't use DEFINE_PROP_BOOL in the Property array for this | |
227 | * property, because we want this to be settable after realize. | |
228 | */ | |
229 | object_class_property_add_bool(oc, "start-powered-off", | |
230 | cpu_get_start_powered_off, | |
231 | cpu_set_start_powered_off); | |
0f9237f4 PMD |
232 | #endif |
233 | ||
234 | device_class_set_props(dc, cpu_common_props); | |
995b87de RH |
235 | } |
236 | ||
d9f24bf5 PB |
237 | void cpu_exec_initfn(CPUState *cpu) |
238 | { | |
239 | cpu->as = NULL; | |
240 | cpu->num_ases = 0; | |
241 | ||
242 | #ifndef CONFIG_USER_ONLY | |
243 | cpu->thread_id = qemu_get_thread_id(); | |
244 | cpu->memory = get_system_memory(); | |
245 | object_ref(OBJECT(cpu->memory)); | |
246 | #endif | |
247 | } | |
248 | ||
445946f4 GS |
249 | char *cpu_model_from_type(const char *typename) |
250 | { | |
251 | const char *suffix = "-" CPU_RESOLVING_TYPE; | |
252 | ||
253 | if (!object_class_by_name(typename)) { | |
254 | return NULL; | |
255 | } | |
256 | ||
257 | if (g_str_has_suffix(typename, suffix)) { | |
258 | return g_strndup(typename, strlen(typename) - strlen(suffix)); | |
259 | } | |
260 | ||
261 | return g_strdup(typename); | |
262 | } | |
263 | ||
d9f24bf5 PB |
264 | const char *parse_cpu_option(const char *cpu_option) |
265 | { | |
266 | ObjectClass *oc; | |
267 | CPUClass *cc; | |
268 | gchar **model_pieces; | |
269 | const char *cpu_type; | |
270 | ||
271 | model_pieces = g_strsplit(cpu_option, ",", 2); | |
272 | if (!model_pieces[0]) { | |
273 | error_report("-cpu option cannot be empty"); | |
274 | exit(1); | |
275 | } | |
276 | ||
277 | oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]); | |
278 | if (oc == NULL) { | |
279 | error_report("unable to find CPU model '%s'", model_pieces[0]); | |
280 | g_strfreev(model_pieces); | |
281 | exit(EXIT_FAILURE); | |
282 | } | |
283 | ||
284 | cpu_type = object_class_get_name(oc); | |
285 | cc = CPU_CLASS(oc); | |
286 | cc->parse_features(cpu_type, model_pieces[1], &error_fatal); | |
287 | g_strfreev(model_pieces); | |
288 | return cpu_type; | |
289 | } | |
290 | ||
dfa47531 GS |
291 | #ifndef cpu_list |
292 | static void cpu_list_entry(gpointer data, gpointer user_data) | |
293 | { | |
294 | CPUClass *cc = CPU_CLASS(OBJECT_CLASS(data)); | |
295 | const char *typename = object_class_get_name(OBJECT_CLASS(data)); | |
296 | g_autofree char *model = cpu_model_from_type(typename); | |
297 | ||
298 | if (cc->deprecation_note) { | |
299 | qemu_printf(" %s (deprecated)\n", model); | |
300 | } else { | |
301 | qemu_printf(" %s\n", model); | |
302 | } | |
303 | } | |
304 | ||
305 | static void cpu_list(void) | |
306 | { | |
307 | GSList *list; | |
308 | ||
309 | list = object_class_get_list_sorted(TYPE_CPU, false); | |
310 | qemu_printf("Available CPUs:\n"); | |
311 | g_slist_foreach(list, cpu_list_entry, NULL); | |
312 | g_slist_free(list); | |
313 | } | |
314 | #endif | |
315 | ||
c138c3b8 | 316 | void list_cpus(void) |
377bf6f3 | 317 | { |
377bf6f3 | 318 | cpu_list(); |
377bf6f3 PMD |
319 | } |
320 | ||
d9f24bf5 PB |
321 | /* enable or disable single step mode. EXCP_DEBUG is returned by the |
322 | CPU loop after each instruction */ | |
323 | void cpu_single_step(CPUState *cpu, int enabled) | |
324 | { | |
325 | if (cpu->singlestep_enabled != enabled) { | |
326 | cpu->singlestep_enabled = enabled; | |
412ae126 MY |
327 | |
328 | #if !defined(CONFIG_USER_ONLY) | |
329 | const AccelOpsClass *ops = cpus_get_accel(); | |
330 | if (ops->update_guest_debug) { | |
331 | ops->update_guest_debug(cpu); | |
d9f24bf5 | 332 | } |
412ae126 MY |
333 | #endif |
334 | ||
ad1a706f | 335 | trace_breakpoint_singlestep(cpu->cpu_index, enabled); |
d9f24bf5 PB |
336 | } |
337 | } | |
338 | ||
339 | void cpu_abort(CPUState *cpu, const char *fmt, ...) | |
340 | { | |
341 | va_list ap; | |
342 | va_list ap2; | |
343 | ||
344 | va_start(ap, fmt); | |
345 | va_copy(ap2, ap); | |
346 | fprintf(stderr, "qemu: fatal: "); | |
347 | vfprintf(stderr, fmt, ap); | |
348 | fprintf(stderr, "\n"); | |
349 | cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
350 | if (qemu_log_separate()) { | |
c60f599b | 351 | FILE *logfile = qemu_log_trylock(); |
78b54858 RH |
352 | if (logfile) { |
353 | fprintf(logfile, "qemu: fatal: "); | |
354 | vfprintf(logfile, fmt, ap2); | |
355 | fprintf(logfile, "\n"); | |
356 | cpu_dump_state(cpu, logfile, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
78b54858 RH |
357 | qemu_log_unlock(logfile); |
358 | } | |
d9f24bf5 PB |
359 | } |
360 | va_end(ap2); | |
361 | va_end(ap); | |
362 | replay_finish(); | |
363 | #if defined(CONFIG_USER_ONLY) | |
364 | { | |
365 | struct sigaction act; | |
366 | sigfillset(&act.sa_mask); | |
367 | act.sa_handler = SIG_DFL; | |
368 | act.sa_flags = 0; | |
369 | sigaction(SIGABRT, &act, NULL); | |
370 | } | |
371 | #endif | |
372 | abort(); | |
373 | } | |
374 | ||
375 | /* physical memory access (slow version, mainly for debug) */ | |
376 | #if defined(CONFIG_USER_ONLY) | |
73842ef0 PMD |
377 | int cpu_memory_rw_debug(CPUState *cpu, vaddr addr, |
378 | void *ptr, size_t len, bool is_write) | |
d9f24bf5 PB |
379 | { |
380 | int flags; | |
73842ef0 | 381 | vaddr l, page; |
d9f24bf5 PB |
382 | void * p; |
383 | uint8_t *buf = ptr; | |
87ab2704 IL |
384 | ssize_t written; |
385 | int ret = -1; | |
386 | int fd = -1; | |
d9f24bf5 PB |
387 | |
388 | while (len > 0) { | |
389 | page = addr & TARGET_PAGE_MASK; | |
390 | l = (page + TARGET_PAGE_SIZE) - addr; | |
391 | if (l > len) | |
392 | l = len; | |
393 | flags = page_get_flags(page); | |
87ab2704 IL |
394 | if (!(flags & PAGE_VALID)) { |
395 | goto out_close; | |
396 | } | |
d9f24bf5 | 397 | if (is_write) { |
87ab2704 IL |
398 | if (flags & PAGE_WRITE) { |
399 | /* XXX: this code should not depend on lock_user */ | |
400 | p = lock_user(VERIFY_WRITE, addr, l, 0); | |
401 | if (!p) { | |
402 | goto out_close; | |
403 | } | |
404 | memcpy(p, buf, l); | |
405 | unlock_user(p, addr, l); | |
406 | } else { | |
407 | /* Bypass the host page protection using ptrace. */ | |
408 | if (fd == -1) { | |
409 | fd = open("/proc/self/mem", O_WRONLY); | |
410 | if (fd == -1) { | |
411 | goto out; | |
412 | } | |
413 | } | |
414 | /* | |
415 | * If there is a TranslationBlock and we weren't bypassing the | |
416 | * host page protection, the memcpy() above would SEGV, | |
417 | * ultimately leading to page_unprotect(). So invalidate the | |
418 | * translations manually. Both invalidation and pwrite() must | |
419 | * be under mmap_lock() in order to prevent the creation of | |
420 | * another TranslationBlock in between. | |
421 | */ | |
422 | mmap_lock(); | |
423 | tb_invalidate_phys_range(addr, addr + l - 1); | |
424 | written = pwrite(fd, buf, l, | |
425 | (off_t)(uintptr_t)g2h_untagged(addr)); | |
426 | mmap_unlock(); | |
427 | if (written != l) { | |
428 | goto out_close; | |
429 | } | |
430 | } | |
431 | } else if (flags & PAGE_READ) { | |
d9f24bf5 | 432 | /* XXX: this code should not depend on lock_user */ |
87ab2704 IL |
433 | p = lock_user(VERIFY_READ, addr, l, 1); |
434 | if (!p) { | |
435 | goto out_close; | |
436 | } | |
d9f24bf5 PB |
437 | memcpy(buf, p, l); |
438 | unlock_user(p, addr, 0); | |
87ab2704 IL |
439 | } else { |
440 | /* Bypass the host page protection using ptrace. */ | |
441 | if (fd == -1) { | |
442 | fd = open("/proc/self/mem", O_RDONLY); | |
443 | if (fd == -1) { | |
444 | goto out; | |
445 | } | |
446 | } | |
447 | if (pread(fd, buf, l, | |
448 | (off_t)(uintptr_t)g2h_untagged(addr)) != l) { | |
449 | goto out_close; | |
450 | } | |
d9f24bf5 PB |
451 | } |
452 | len -= l; | |
453 | buf += l; | |
454 | addr += l; | |
455 | } | |
87ab2704 IL |
456 | ret = 0; |
457 | out_close: | |
458 | if (fd != -1) { | |
459 | close(fd); | |
460 | } | |
461 | out: | |
462 | return ret; | |
d9f24bf5 PB |
463 | } |
464 | #endif | |
465 | ||
466 | bool target_words_bigendian(void) | |
467 | { | |
ded625e7 | 468 | return TARGET_BIG_ENDIAN; |
d9f24bf5 PB |
469 | } |
470 | ||
1077f50b TH |
471 | const char *target_name(void) |
472 | { | |
473 | return TARGET_NAME; | |
474 | } |