]>
Commit | Line | Data |
---|---|---|
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" | |
21 | #include "qemu-common.h" | |
22 | #include "qapi/error.h" | |
23 | ||
24 | #include "exec/target_page.h" | |
25 | #include "hw/qdev-core.h" | |
26 | #include "hw/qdev-properties.h" | |
27 | #include "qemu/error-report.h" | |
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 PB |
33 | #include "exec/address-spaces.h" |
34 | #endif | |
35 | #include "sysemu/tcg.h" | |
36 | #include "sysemu/kvm.h" | |
37 | #include "sysemu/replay.h" | |
3b9bd3f4 | 38 | #include "exec/translate-all.h" |
d9f24bf5 | 39 | #include "exec/log.h" |
30565f10 | 40 | #include "hw/core/accel-cpu.h" |
ad1a706f | 41 | #include "trace/trace-root.h" |
d9f24bf5 PB |
42 | |
43 | uintptr_t qemu_host_page_size; | |
44 | intptr_t qemu_host_page_mask; | |
45 | ||
46 | #ifndef CONFIG_USER_ONLY | |
47 | static int cpu_common_post_load(void *opaque, int version_id) | |
48 | { | |
49 | CPUState *cpu = opaque; | |
50 | ||
51 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the | |
52 | version_id is increased. */ | |
53 | cpu->interrupt_request &= ~0x01; | |
54 | tlb_flush(cpu); | |
55 | ||
56 | /* loadvm has just updated the content of RAM, bypassing the | |
57 | * usual mechanisms that ensure we flush TBs for writes to | |
58 | * memory we've translated code from. So we must flush all TBs, | |
59 | * which will now be stale. | |
60 | */ | |
61 | tb_flush(cpu); | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | static int cpu_common_pre_load(void *opaque) | |
67 | { | |
68 | CPUState *cpu = opaque; | |
69 | ||
70 | cpu->exception_index = -1; | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
75 | static bool cpu_common_exception_index_needed(void *opaque) | |
76 | { | |
77 | CPUState *cpu = opaque; | |
78 | ||
79 | return tcg_enabled() && cpu->exception_index != -1; | |
80 | } | |
81 | ||
82 | static const VMStateDescription vmstate_cpu_common_exception_index = { | |
83 | .name = "cpu_common/exception_index", | |
84 | .version_id = 1, | |
85 | .minimum_version_id = 1, | |
86 | .needed = cpu_common_exception_index_needed, | |
87 | .fields = (VMStateField[]) { | |
88 | VMSTATE_INT32(exception_index, CPUState), | |
89 | VMSTATE_END_OF_LIST() | |
90 | } | |
91 | }; | |
92 | ||
93 | static bool cpu_common_crash_occurred_needed(void *opaque) | |
94 | { | |
95 | CPUState *cpu = opaque; | |
96 | ||
97 | return cpu->crash_occurred; | |
98 | } | |
99 | ||
100 | static const VMStateDescription vmstate_cpu_common_crash_occurred = { | |
101 | .name = "cpu_common/crash_occurred", | |
102 | .version_id = 1, | |
103 | .minimum_version_id = 1, | |
104 | .needed = cpu_common_crash_occurred_needed, | |
105 | .fields = (VMStateField[]) { | |
106 | VMSTATE_BOOL(crash_occurred, CPUState), | |
107 | VMSTATE_END_OF_LIST() | |
108 | } | |
109 | }; | |
110 | ||
111 | const VMStateDescription vmstate_cpu_common = { | |
112 | .name = "cpu_common", | |
113 | .version_id = 1, | |
114 | .minimum_version_id = 1, | |
115 | .pre_load = cpu_common_pre_load, | |
116 | .post_load = cpu_common_post_load, | |
117 | .fields = (VMStateField[]) { | |
118 | VMSTATE_UINT32(halted, CPUState), | |
119 | VMSTATE_UINT32(interrupt_request, CPUState), | |
120 | VMSTATE_END_OF_LIST() | |
121 | }, | |
122 | .subsections = (const VMStateDescription*[]) { | |
123 | &vmstate_cpu_common_exception_index, | |
124 | &vmstate_cpu_common_crash_occurred, | |
125 | NULL | |
126 | } | |
127 | }; | |
128 | #endif | |
129 | ||
7df5e3d6 | 130 | void cpu_exec_realizefn(CPUState *cpu, Error **errp) |
d9f24bf5 | 131 | { |
feece4d0 | 132 | #ifndef CONFIG_USER_ONLY |
d9f24bf5 | 133 | CPUClass *cc = CPU_GET_CLASS(cpu); |
feece4d0 | 134 | #endif |
d9f24bf5 | 135 | |
7df5e3d6 | 136 | cpu_list_add(cpu); |
9ea057dc CF |
137 | if (!accel_cpu_realizefn(cpu, errp)) { |
138 | return; | |
139 | } | |
7df5e3d6 CF |
140 | /* NB: errp parameter is unused currently */ |
141 | if (tcg_enabled()) { | |
142 | tcg_exec_realizefn(cpu, errp); | |
143 | } | |
7df5e3d6 CF |
144 | |
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 | } | |
feece4d0 PMD |
152 | if (cc->sysemu_ops->legacy_vmsd != NULL) { |
153 | vmstate_register(NULL, cpu->cpu_index, cc->sysemu_ops->legacy_vmsd, cpu); | |
7df5e3d6 CF |
154 | } |
155 | #endif /* CONFIG_USER_ONLY */ | |
156 | } | |
157 | ||
158 | void cpu_exec_unrealizefn(CPUState *cpu) | |
159 | { | |
feece4d0 | 160 | #ifndef CONFIG_USER_ONLY |
7df5e3d6 | 161 | CPUClass *cc = CPU_GET_CLASS(cpu); |
d9f24bf5 | 162 | |
feece4d0 PMD |
163 | if (cc->sysemu_ops->legacy_vmsd != NULL) { |
164 | vmstate_unregister(NULL, cc->sysemu_ops->legacy_vmsd, cpu); | |
d9f24bf5 PB |
165 | } |
166 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { | |
167 | vmstate_unregister(NULL, &vmstate_cpu_common, cpu); | |
168 | } | |
d9f24bf5 | 169 | #endif |
7df5e3d6 CF |
170 | if (tcg_enabled()) { |
171 | tcg_exec_unrealizefn(cpu); | |
172 | } | |
7df5e3d6 CF |
173 | |
174 | cpu_list_remove(cpu); | |
d9f24bf5 PB |
175 | } |
176 | ||
995b87de RH |
177 | static Property cpu_common_props[] = { |
178 | #ifndef CONFIG_USER_ONLY | |
179 | /* | |
180 | * Create a memory property for softmmu CPU object, | |
181 | * so users can wire up its memory. (This can't go in hw/core/cpu.c | |
182 | * because that file is compiled only once for both user-mode | |
183 | * and system builds.) The default if no link is set up is to use | |
184 | * the system address space. | |
185 | */ | |
186 | DEFINE_PROP_LINK("memory", CPUState, memory, TYPE_MEMORY_REGION, | |
187 | MemoryRegion *), | |
188 | #endif | |
189 | DEFINE_PROP_BOOL("start-powered-off", CPUState, start_powered_off, false), | |
190 | DEFINE_PROP_END_OF_LIST(), | |
191 | }; | |
192 | ||
193 | void cpu_class_init_props(DeviceClass *dc) | |
194 | { | |
195 | device_class_set_props(dc, cpu_common_props); | |
196 | } | |
197 | ||
d9f24bf5 PB |
198 | void cpu_exec_initfn(CPUState *cpu) |
199 | { | |
200 | cpu->as = NULL; | |
201 | cpu->num_ases = 0; | |
202 | ||
203 | #ifndef CONFIG_USER_ONLY | |
204 | cpu->thread_id = qemu_get_thread_id(); | |
205 | cpu->memory = get_system_memory(); | |
206 | object_ref(OBJECT(cpu->memory)); | |
207 | #endif | |
208 | } | |
209 | ||
d9f24bf5 PB |
210 | const char *parse_cpu_option(const char *cpu_option) |
211 | { | |
212 | ObjectClass *oc; | |
213 | CPUClass *cc; | |
214 | gchar **model_pieces; | |
215 | const char *cpu_type; | |
216 | ||
217 | model_pieces = g_strsplit(cpu_option, ",", 2); | |
218 | if (!model_pieces[0]) { | |
219 | error_report("-cpu option cannot be empty"); | |
220 | exit(1); | |
221 | } | |
222 | ||
223 | oc = cpu_class_by_name(CPU_RESOLVING_TYPE, model_pieces[0]); | |
224 | if (oc == NULL) { | |
225 | error_report("unable to find CPU model '%s'", model_pieces[0]); | |
226 | g_strfreev(model_pieces); | |
227 | exit(EXIT_FAILURE); | |
228 | } | |
229 | ||
230 | cpu_type = object_class_get_name(oc); | |
231 | cc = CPU_CLASS(oc); | |
232 | cc->parse_features(cpu_type, model_pieces[1], &error_fatal); | |
233 | g_strfreev(model_pieces); | |
234 | return cpu_type; | |
235 | } | |
236 | ||
237 | #if defined(CONFIG_USER_ONLY) | |
238 | void tb_invalidate_phys_addr(target_ulong addr) | |
239 | { | |
240 | mmap_lock(); | |
241 | tb_invalidate_phys_page_range(addr, addr + 1); | |
242 | mmap_unlock(); | |
243 | } | |
d9f24bf5 PB |
244 | #else |
245 | void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr, MemTxAttrs attrs) | |
246 | { | |
247 | ram_addr_t ram_addr; | |
248 | MemoryRegion *mr; | |
249 | hwaddr l = 1; | |
250 | ||
251 | if (!tcg_enabled()) { | |
252 | return; | |
253 | } | |
254 | ||
255 | RCU_READ_LOCK_GUARD(); | |
256 | mr = address_space_translate(as, addr, &addr, &l, false, attrs); | |
257 | if (!(memory_region_is_ram(mr) | |
258 | || memory_region_is_romd(mr))) { | |
259 | return; | |
260 | } | |
261 | ram_addr = memory_region_get_ram_addr(mr) + addr; | |
262 | tb_invalidate_phys_page_range(ram_addr, ram_addr + 1); | |
263 | } | |
d9f24bf5 PB |
264 | #endif |
265 | ||
266 | /* Add a breakpoint. */ | |
267 | int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags, | |
268 | CPUBreakpoint **breakpoint) | |
269 | { | |
5bc31e94 | 270 | CPUClass *cc = CPU_GET_CLASS(cpu); |
d9f24bf5 PB |
271 | CPUBreakpoint *bp; |
272 | ||
5bc31e94 RH |
273 | if (cc->gdb_adjust_breakpoint) { |
274 | pc = cc->gdb_adjust_breakpoint(cpu, pc); | |
275 | } | |
276 | ||
d9f24bf5 PB |
277 | bp = g_malloc(sizeof(*bp)); |
278 | ||
279 | bp->pc = pc; | |
280 | bp->flags = flags; | |
281 | ||
282 | /* keep all GDB-injected breakpoints in front */ | |
283 | if (flags & BP_GDB) { | |
284 | QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry); | |
285 | } else { | |
286 | QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry); | |
287 | } | |
288 | ||
d9f24bf5 PB |
289 | if (breakpoint) { |
290 | *breakpoint = bp; | |
291 | } | |
ad1a706f RH |
292 | |
293 | trace_breakpoint_insert(cpu->cpu_index, pc, flags); | |
d9f24bf5 PB |
294 | return 0; |
295 | } | |
296 | ||
297 | /* Remove a specific breakpoint. */ | |
298 | int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags) | |
299 | { | |
5bc31e94 | 300 | CPUClass *cc = CPU_GET_CLASS(cpu); |
d9f24bf5 PB |
301 | CPUBreakpoint *bp; |
302 | ||
5bc31e94 RH |
303 | if (cc->gdb_adjust_breakpoint) { |
304 | pc = cc->gdb_adjust_breakpoint(cpu, pc); | |
305 | } | |
306 | ||
d9f24bf5 PB |
307 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
308 | if (bp->pc == pc && bp->flags == flags) { | |
309 | cpu_breakpoint_remove_by_ref(cpu, bp); | |
310 | return 0; | |
311 | } | |
312 | } | |
313 | return -ENOENT; | |
314 | } | |
315 | ||
316 | /* Remove a specific breakpoint by reference. */ | |
ad1a706f | 317 | void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *bp) |
d9f24bf5 | 318 | { |
ad1a706f | 319 | QTAILQ_REMOVE(&cpu->breakpoints, bp, entry); |
d9f24bf5 | 320 | |
ad1a706f RH |
321 | trace_breakpoint_remove(cpu->cpu_index, bp->pc, bp->flags); |
322 | g_free(bp); | |
d9f24bf5 PB |
323 | } |
324 | ||
325 | /* Remove all matching breakpoints. */ | |
326 | void cpu_breakpoint_remove_all(CPUState *cpu, int mask) | |
327 | { | |
328 | CPUBreakpoint *bp, *next; | |
329 | ||
330 | QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) { | |
331 | if (bp->flags & mask) { | |
332 | cpu_breakpoint_remove_by_ref(cpu, bp); | |
333 | } | |
334 | } | |
335 | } | |
336 | ||
337 | /* enable or disable single step mode. EXCP_DEBUG is returned by the | |
338 | CPU loop after each instruction */ | |
339 | void cpu_single_step(CPUState *cpu, int enabled) | |
340 | { | |
341 | if (cpu->singlestep_enabled != enabled) { | |
342 | cpu->singlestep_enabled = enabled; | |
343 | if (kvm_enabled()) { | |
344 | kvm_update_guest_debug(cpu, 0); | |
d9f24bf5 | 345 | } |
ad1a706f | 346 | trace_breakpoint_singlestep(cpu->cpu_index, enabled); |
d9f24bf5 PB |
347 | } |
348 | } | |
349 | ||
350 | void cpu_abort(CPUState *cpu, const char *fmt, ...) | |
351 | { | |
352 | va_list ap; | |
353 | va_list ap2; | |
354 | ||
355 | va_start(ap, fmt); | |
356 | va_copy(ap2, ap); | |
357 | fprintf(stderr, "qemu: fatal: "); | |
358 | vfprintf(stderr, fmt, ap); | |
359 | fprintf(stderr, "\n"); | |
360 | cpu_dump_state(cpu, stderr, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
361 | if (qemu_log_separate()) { | |
362 | FILE *logfile = qemu_log_lock(); | |
363 | qemu_log("qemu: fatal: "); | |
364 | qemu_log_vprintf(fmt, ap2); | |
365 | qemu_log("\n"); | |
366 | log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP); | |
367 | qemu_log_flush(); | |
368 | qemu_log_unlock(logfile); | |
369 | qemu_log_close(); | |
370 | } | |
371 | va_end(ap2); | |
372 | va_end(ap); | |
373 | replay_finish(); | |
374 | #if defined(CONFIG_USER_ONLY) | |
375 | { | |
376 | struct sigaction act; | |
377 | sigfillset(&act.sa_mask); | |
378 | act.sa_handler = SIG_DFL; | |
379 | act.sa_flags = 0; | |
380 | sigaction(SIGABRT, &act, NULL); | |
381 | } | |
382 | #endif | |
383 | abort(); | |
384 | } | |
385 | ||
386 | /* physical memory access (slow version, mainly for debug) */ | |
387 | #if defined(CONFIG_USER_ONLY) | |
388 | int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, | |
389 | void *ptr, target_ulong len, bool is_write) | |
390 | { | |
391 | int flags; | |
392 | target_ulong l, page; | |
393 | void * p; | |
394 | uint8_t *buf = ptr; | |
395 | ||
396 | while (len > 0) { | |
397 | page = addr & TARGET_PAGE_MASK; | |
398 | l = (page + TARGET_PAGE_SIZE) - addr; | |
399 | if (l > len) | |
400 | l = len; | |
401 | flags = page_get_flags(page); | |
402 | if (!(flags & PAGE_VALID)) | |
403 | return -1; | |
404 | if (is_write) { | |
405 | if (!(flags & PAGE_WRITE)) | |
406 | return -1; | |
407 | /* XXX: this code should not depend on lock_user */ | |
408 | if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) | |
409 | return -1; | |
410 | memcpy(p, buf, l); | |
411 | unlock_user(p, addr, l); | |
412 | } else { | |
413 | if (!(flags & PAGE_READ)) | |
414 | return -1; | |
415 | /* XXX: this code should not depend on lock_user */ | |
416 | if (!(p = lock_user(VERIFY_READ, addr, l, 1))) | |
417 | return -1; | |
418 | memcpy(buf, p, l); | |
419 | unlock_user(p, addr, 0); | |
420 | } | |
421 | len -= l; | |
422 | buf += l; | |
423 | addr += l; | |
424 | } | |
425 | return 0; | |
426 | } | |
427 | #endif | |
428 | ||
429 | bool target_words_bigendian(void) | |
430 | { | |
431 | #if defined(TARGET_WORDS_BIGENDIAN) | |
432 | return true; | |
433 | #else | |
434 | return false; | |
435 | #endif | |
436 | } | |
437 | ||
438 | void page_size_init(void) | |
439 | { | |
440 | /* NOTE: we can always suppose that qemu_host_page_size >= | |
441 | TARGET_PAGE_SIZE */ | |
442 | if (qemu_host_page_size == 0) { | |
443 | qemu_host_page_size = qemu_real_host_page_size; | |
444 | } | |
445 | if (qemu_host_page_size < TARGET_PAGE_SIZE) { | |
446 | qemu_host_page_size = TARGET_PAGE_SIZE; | |
447 | } | |
448 | qemu_host_page_mask = -(intptr_t)qemu_host_page_size; | |
449 | } |