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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" | |
27 | #include "migration/vmstate.h" | |
28 | #ifdef CONFIG_USER_ONLY | |
29 | #include "qemu.h" | |
30 | #else | |
8b80bd28 | 31 | #include "hw/core/sysemu-cpu-ops.h" |
d9f24bf5 PB |
32 | #include "exec/address-spaces.h" |
33 | #endif | |
412ae126 | 34 | #include "sysemu/cpus.h" |
d9f24bf5 | 35 | #include "sysemu/tcg.h" |
5b5968c4 | 36 | #include "exec/replay-core.h" |
377bf6f3 | 37 | #include "exec/cpu-common.h" |
3b04508c | 38 | #include "exec/exec-all.h" |
548c9609 | 39 | #include "exec/tb-flush.h" |
3b9bd3f4 | 40 | #include "exec/translate-all.h" |
d9f24bf5 | 41 | #include "exec/log.h" |
30565f10 | 42 | #include "hw/core/accel-cpu.h" |
ad1a706f | 43 | #include "trace/trace-root.h" |
3b04508c | 44 | #include "qemu/accel.h" |
720ace24 | 45 | #include "qemu/plugin.h" |
d9f24bf5 PB |
46 | |
47 | uintptr_t qemu_host_page_size; | |
48 | intptr_t qemu_host_page_mask; | |
49 | ||
50 | #ifndef CONFIG_USER_ONLY | |
51 | static int cpu_common_post_load(void *opaque, int version_id) | |
52 | { | |
53 | CPUState *cpu = opaque; | |
54 | ||
55 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the | |
56 | version_id is increased. */ | |
57 | cpu->interrupt_request &= ~0x01; | |
58 | tlb_flush(cpu); | |
59 | ||
60 | /* loadvm has just updated the content of RAM, bypassing the | |
61 | * usual mechanisms that ensure we flush TBs for writes to | |
62 | * memory we've translated code from. So we must flush all TBs, | |
63 | * which will now be stale. | |
64 | */ | |
65 | tb_flush(cpu); | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | static int cpu_common_pre_load(void *opaque) | |
71 | { | |
72 | CPUState *cpu = opaque; | |
73 | ||
74 | cpu->exception_index = -1; | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static bool cpu_common_exception_index_needed(void *opaque) | |
80 | { | |
81 | CPUState *cpu = opaque; | |
82 | ||
83 | return tcg_enabled() && cpu->exception_index != -1; | |
84 | } | |
85 | ||
86 | static const VMStateDescription vmstate_cpu_common_exception_index = { | |
87 | .name = "cpu_common/exception_index", | |
88 | .version_id = 1, | |
89 | .minimum_version_id = 1, | |
90 | .needed = cpu_common_exception_index_needed, | |
91 | .fields = (VMStateField[]) { | |
92 | VMSTATE_INT32(exception_index, CPUState), | |
93 | VMSTATE_END_OF_LIST() | |
94 | } | |
95 | }; | |
96 | ||
97 | static bool cpu_common_crash_occurred_needed(void *opaque) | |
98 | { | |
99 | CPUState *cpu = opaque; | |
100 | ||
101 | return cpu->crash_occurred; | |
102 | } | |
103 | ||
104 | static const VMStateDescription vmstate_cpu_common_crash_occurred = { | |
105 | .name = "cpu_common/crash_occurred", | |
106 | .version_id = 1, | |
107 | .minimum_version_id = 1, | |
108 | .needed = cpu_common_crash_occurred_needed, | |
109 | .fields = (VMStateField[]) { | |
110 | VMSTATE_BOOL(crash_occurred, CPUState), | |
111 | VMSTATE_END_OF_LIST() | |
112 | } | |
113 | }; | |
114 | ||
115 | const VMStateDescription vmstate_cpu_common = { | |
116 | .name = "cpu_common", | |
117 | .version_id = 1, | |
118 | .minimum_version_id = 1, | |
119 | .pre_load = cpu_common_pre_load, | |
120 | .post_load = cpu_common_post_load, | |
121 | .fields = (VMStateField[]) { | |
122 | VMSTATE_UINT32(halted, CPUState), | |
123 | VMSTATE_UINT32(interrupt_request, CPUState), | |
124 | VMSTATE_END_OF_LIST() | |
125 | }, | |
126 | .subsections = (const VMStateDescription*[]) { | |
127 | &vmstate_cpu_common_exception_index, | |
128 | &vmstate_cpu_common_crash_occurred, | |
129 | NULL | |
130 | } | |
131 | }; | |
132 | #endif | |
133 | ||
7df5e3d6 | 134 | void cpu_exec_realizefn(CPUState *cpu, Error **errp) |
d9f24bf5 | 135 | { |
6fbdff87 AB |
136 | /* cache the cpu class for the hotpath */ |
137 | cpu->cc = CPU_GET_CLASS(cpu); | |
d9f24bf5 | 138 | |
bd684b2f | 139 | if (!accel_cpu_common_realize(cpu, errp)) { |
9ea057dc CF |
140 | return; |
141 | } | |
4e4fa6c1 | 142 | |
4e4fa6c1 RH |
143 | /* Wait until cpu initialization complete before exposing cpu. */ |
144 | cpu_list_add(cpu); | |
145 | ||
146 | /* Plugin initialization must wait until cpu_index assigned. */ | |
147 | if (tcg_enabled()) { | |
148 | qemu_plugin_vcpu_init_hook(cpu); | |
149 | } | |
150 | ||
7df5e3d6 | 151 | #ifdef CONFIG_USER_ONLY |
4336073b PMD |
152 | assert(qdev_get_vmsd(DEVICE(cpu)) == NULL || |
153 | qdev_get_vmsd(DEVICE(cpu))->unmigratable); | |
7df5e3d6 CF |
154 | #else |
155 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { | |
156 | vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu); | |
157 | } | |
6fbdff87 AB |
158 | if (cpu->cc->sysemu_ops->legacy_vmsd != NULL) { |
159 | vmstate_register(NULL, cpu->cpu_index, cpu->cc->sysemu_ops->legacy_vmsd, cpu); | |
7df5e3d6 CF |
160 | } |
161 | #endif /* CONFIG_USER_ONLY */ | |
162 | } | |
163 | ||
164 | void cpu_exec_unrealizefn(CPUState *cpu) | |
165 | { | |
feece4d0 | 166 | #ifndef CONFIG_USER_ONLY |
7df5e3d6 | 167 | CPUClass *cc = CPU_GET_CLASS(cpu); |
d9f24bf5 | 168 | |
feece4d0 PMD |
169 | if (cc->sysemu_ops->legacy_vmsd != NULL) { |
170 | vmstate_unregister(NULL, cc->sysemu_ops->legacy_vmsd, cpu); | |
d9f24bf5 PB |
171 | } |
172 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { | |
173 | vmstate_unregister(NULL, &vmstate_cpu_common, cpu); | |
174 | } | |
d9f24bf5 | 175 | #endif |
4731f89b EC |
176 | |
177 | /* Call the plugin hook before clearing cpu->cpu_index in cpu_list_remove */ | |
7df5e3d6 | 178 | if (tcg_enabled()) { |
4731f89b | 179 | qemu_plugin_vcpu_exit_hook(cpu); |
7df5e3d6 | 180 | } |
7df5e3d6 CF |
181 | |
182 | cpu_list_remove(cpu); | |
4731f89b EC |
183 | /* |
184 | * Now that the vCPU has been removed from the RCU list, we can call | |
1aa1d830 | 185 | * accel_cpu_common_unrealize, which may free fields using call_rcu. |
4731f89b | 186 | */ |
1aa1d830 | 187 | accel_cpu_common_unrealize(cpu); |
d9f24bf5 PB |
188 | } |
189 | ||
6e8dcacd RH |
190 | /* |
191 | * This can't go in hw/core/cpu.c because that file is compiled only | |
192 | * once for both user-mode and system builds. | |
193 | */ | |
995b87de | 194 | static Property cpu_common_props[] = { |
6e8dcacd RH |
195 | #ifdef CONFIG_USER_ONLY |
196 | /* | |
197 | * Create a property for the user-only object, so users can | |
198 | * adjust prctl(PR_SET_UNALIGN) from the command-line. | |
199 | * Has no effect if the target does not support the feature. | |
200 | */ | |
201 | DEFINE_PROP_BOOL("prctl-unalign-sigbus", CPUState, | |
202 | prctl_unalign_sigbus, false), | |
203 | #else | |
995b87de | 204 | /* |
54b99122 | 205 | * Create a memory property for system CPU object, so users can |
6e8dcacd | 206 | * wire up its memory. The default if no link is set up is to use |
995b87de RH |
207 | * the system address space. |
208 | */ | |
209 | DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION, | |
210 | MemoryRegion *), | |
211 | #endif | |
995b87de RH |
212 | DEFINE_PROP_END_OF_LIST(), |
213 | }; | |
214 | ||
0c3c25fc PM |
215 | static bool cpu_get_start_powered_off(Object *obj, Error **errp) |
216 | { | |
217 | CPUState *cpu = CPU(obj); | |
218 | return cpu->start_powered_off; | |
219 | } | |
220 | ||
221 | static void cpu_set_start_powered_off(Object *obj, bool value, Error **errp) | |
222 | { | |
223 | CPUState *cpu = CPU(obj); | |
224 | cpu->start_powered_off = value; | |
225 | } | |
226 | ||
995b87de RH |
227 | void cpu_class_init_props(DeviceClass *dc) |
228 | { | |
0c3c25fc PM |
229 | ObjectClass *oc = OBJECT_CLASS(dc); |
230 | ||
995b87de | 231 | device_class_set_props(dc, cpu_common_props); |
0c3c25fc PM |
232 | /* |
233 | * We can't use DEFINE_PROP_BOOL in the Property array for this | |
234 | * property, because we want this to be settable after realize. | |
235 | */ | |
236 | object_class_property_add_bool(oc, "start-powered-off", | |
237 | cpu_get_start_powered_off, | |
238 | cpu_set_start_powered_off); | |
995b87de RH |
239 | } |
240 | ||
d9f24bf5 PB |
241 | void cpu_exec_initfn(CPUState *cpu) |
242 | { | |
243 | cpu->as = NULL; | |
244 | cpu->num_ases = 0; | |
245 | ||
246 | #ifndef CONFIG_USER_ONLY | |
247 | cpu->thread_id = qemu_get_thread_id(); | |
248 | cpu->memory = get_system_memory(); | |
249 | object_ref(OBJECT(cpu->memory)); | |
250 | #endif | |
251 | } | |
252 | ||
d9f24bf5 PB |
253 | const char *parse_cpu_option(const char *cpu_option) |
254 | { | |
255 | ObjectClass *oc; | |
256 | CPUClass *cc; | |
257 | gchar **model_pieces; | |
258 | const char *cpu_type; | |
259 | ||
260 | model_pieces = g_strsplit(cpu_option, ",", 2); | |
261 | if (!model_pieces[0]) { | |
262 | error_report("-cpu option cannot be empty"); | |
263 | exit(1); | |
264 | } | |
265 | ||
266 | oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]); | |
267 | if (oc == NULL) { | |
268 | error_report("unable to find CPU model '%s'", model_pieces[0]); | |
269 | g_strfreev(model_pieces); | |
270 | exit(EXIT_FAILURE); | |
271 | } | |
272 | ||
273 | cpu_type = object_class_get_name(oc); | |
274 | cc = CPU_CLASS(oc); | |
275 | cc->parse_features(cpu_type, model_pieces[1], &error_fatal); | |
276 | g_strfreev(model_pieces); | |
277 | return cpu_type; | |
278 | } | |
279 | ||
c138c3b8 | 280 | void list_cpus(void) |
377bf6f3 PMD |
281 | { |
282 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
283 | #if defined(cpu_list) | |
284 | cpu_list(); | |
285 | #endif | |
286 | } | |
287 | ||
d9f24bf5 | 288 | #if defined(CONFIG_USER_ONLY) |
c814c892 | 289 | void tb_invalidate_phys_addr(hwaddr addr) |
d9f24bf5 PB |
290 | { |
291 | mmap_lock(); | |
d6d1fd29 | 292 | tb_invalidate_phys_page(addr); |
d9f24bf5 PB |
293 | mmap_unlock(); |
294 | } | |
d9f24bf5 PB |
295 | #else |
296 | void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs) | |
297 | { | |
298 | ram_addr_t ram_addr; | |
299 | MemoryRegion *mr; | |
300 | hwaddr l = 1; | |
301 | ||
302 | if (!tcg_enabled()) { | |
303 | return; | |
304 | } | |
305 | ||
306 | RCU_READ_LOCK_GUARD(); | |
307 | mr = address_space_translate(as, addr, &addr, &l, false, attrs); | |
308 | if (!(memory_region_is_ram(mr) | |
309 | || memory_region_is_romd(mr))) { | |
310 | return; | |
311 | } | |
312 | ram_addr = memory_region_get_ram_addr(mr) + addr; | |
d6d1fd29 | 313 | tb_invalidate_phys_page(ram_addr); |
d9f24bf5 | 314 | } |
d9f24bf5 PB |
315 | #endif |
316 | ||
d9f24bf5 PB |
317 | /* enable or disable single step mode. EXCP_DEBUG is returned by the |
318 | CPU loop after each instruction */ | |
319 | void cpu_single_step(CPUState *cpu, int enabled) | |
320 | { | |
321 | if (cpu->singlestep_enabled != enabled) { | |
322 | cpu->singlestep_enabled = enabled; | |
412ae126 MY |
323 | |
324 | #if !defined(CONFIG_USER_ONLY) | |
325 | const AccelOpsClass *ops = cpus_get_accel(); | |
326 | if (ops->update_guest_debug) { | |
327 | ops->update_guest_debug(cpu); | |
d9f24bf5 | 328 | } |
412ae126 MY |
329 | #endif |
330 | ||
ad1a706f | 331 | trace_breakpoint_singlestep(cpu->cpu_index, enabled); |
d9f24bf5 PB |
332 | } |
333 | } | |
334 | ||
335 | void cpu_abort(CPUState *cpu, const char *fmt, ...) | |
336 | { | |
337 | va_list ap; | |
338 | va_list ap2; | |
339 | ||
340 | va_start(ap, fmt); | |
341 | va_copy(ap2, ap); | |
342 | fprintf(stderr, "qemu: fatal: "); | |
343 | vfprintf(stderr, fmt, ap); | |
344 | fprintf(stderr, "\n"); | |
345 | cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
346 | if (qemu_log_separate()) { | |
c60f599b | 347 | FILE *logfile = qemu_log_trylock(); |
78b54858 RH |
348 | if (logfile) { |
349 | fprintf(logfile, "qemu: fatal: "); | |
350 | vfprintf(logfile, fmt, ap2); | |
351 | fprintf(logfile, "\n"); | |
352 | cpu_dump_state(cpu, logfile, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
78b54858 RH |
353 | qemu_log_unlock(logfile); |
354 | } | |
d9f24bf5 PB |
355 | } |
356 | va_end(ap2); | |
357 | va_end(ap); | |
358 | replay_finish(); | |
359 | #if defined(CONFIG_USER_ONLY) | |
360 | { | |
361 | struct sigaction act; | |
362 | sigfillset(&act.sa_mask); | |
363 | act.sa_handler = SIG_DFL; | |
364 | act.sa_flags = 0; | |
365 | sigaction(SIGABRT, &act, NULL); | |
366 | } | |
367 | #endif | |
368 | abort(); | |
369 | } | |
370 | ||
371 | /* physical memory access (slow version, mainly for debug) */ | |
372 | #if defined(CONFIG_USER_ONLY) | |
73842ef0 PMD |
373 | int cpu_memory_rw_debug(CPUState *cpu, vaddr addr, |
374 | void *ptr, size_t len, bool is_write) | |
d9f24bf5 PB |
375 | { |
376 | int flags; | |
73842ef0 | 377 | vaddr l, page; |
d9f24bf5 PB |
378 | void * p; |
379 | uint8_t *buf = ptr; | |
380 | ||
381 | while (len > 0) { | |
382 | page = addr & TARGET_PAGE_MASK; | |
383 | l = (page + TARGET_PAGE_SIZE) - addr; | |
384 | if (l > len) | |
385 | l = len; | |
386 | flags = page_get_flags(page); | |
387 | if (!(flags & PAGE_VALID)) | |
388 | return -1; | |
389 | if (is_write) { | |
390 | if (!(flags & PAGE_WRITE)) | |
391 | return -1; | |
392 | /* XXX: this code should not depend on lock_user */ | |
393 | if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) | |
394 | return -1; | |
395 | memcpy(p, buf, l); | |
396 | unlock_user(p, addr, l); | |
397 | } else { | |
398 | if (!(flags & PAGE_READ)) | |
399 | return -1; | |
400 | /* XXX: this code should not depend on lock_user */ | |
401 | if (!(p = lock_user(VERIFY_READ, addr, l, 1))) | |
402 | return -1; | |
403 | memcpy(buf, p, l); | |
404 | unlock_user(p, addr, 0); | |
405 | } | |
406 | len -= l; | |
407 | buf += l; | |
408 | addr += l; | |
409 | } | |
410 | return 0; | |
411 | } | |
412 | #endif | |
413 | ||
414 | bool target_words_bigendian(void) | |
415 | { | |
ded625e7 | 416 | return TARGET_BIG_ENDIAN; |
d9f24bf5 PB |
417 | } |
418 | ||
1077f50b TH |
419 | const char *target_name(void) |
420 | { | |
421 | return TARGET_NAME; | |
422 | } | |
423 | ||
d9f24bf5 PB |
424 | void page_size_init(void) |
425 | { | |
426 | /* NOTE: we can always suppose that qemu_host_page_size >= | |
427 | TARGET_PAGE_SIZE */ | |
428 | if (qemu_host_page_size == 0) { | |
8e3b0cbb | 429 | qemu_host_page_size = qemu_real_host_page_size(); |
d9f24bf5 PB |
430 | } |
431 | if (qemu_host_page_size < TARGET_PAGE_SIZE) { | |
432 | qemu_host_page_size = TARGET_PAGE_SIZE; | |
433 | } | |
434 | qemu_host_page_mask = -(intptr_t)qemu_host_page_size; | |
435 | } |