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1 | /* | |
2 | * QEMU System Emulator | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | #include <stdint.h> | |
25 | #include <stdarg.h> | |
26 | #include <stdlib.h> | |
27 | #ifndef _WIN32 | |
28 | #include <sys/types.h> | |
29 | #include <sys/mman.h> | |
30 | #endif | |
31 | #include "config.h" | |
32 | #include "monitor/monitor.h" | |
33 | #include "sysemu/sysemu.h" | |
34 | #include "qemu/bitops.h" | |
35 | #include "qemu/bitmap.h" | |
36 | #include "sysemu/arch_init.h" | |
37 | #include "audio/audio.h" | |
38 | #include "hw/i386/pc.h" | |
39 | #include "hw/pci/pci.h" | |
40 | #include "hw/audio/audio.h" | |
41 | #include "sysemu/kvm.h" | |
42 | #include "migration/migration.h" | |
43 | #include "hw/i386/smbios.h" | |
44 | #include "exec/address-spaces.h" | |
45 | #include "hw/audio/pcspk.h" | |
46 | #include "migration/page_cache.h" | |
47 | #include "qemu/config-file.h" | |
48 | #include "qmp-commands.h" | |
49 | #include "trace.h" | |
50 | #include "exec/cpu-all.h" | |
51 | #include "hw/acpi/acpi.h" | |
52 | ||
53 | #ifdef DEBUG_ARCH_INIT | |
54 | #define DPRINTF(fmt, ...) \ | |
55 | do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0) | |
56 | #else | |
57 | #define DPRINTF(fmt, ...) \ | |
58 | do { } while (0) | |
59 | #endif | |
60 | ||
61 | #ifdef TARGET_SPARC | |
62 | int graphic_width = 1024; | |
63 | int graphic_height = 768; | |
64 | int graphic_depth = 8; | |
65 | #else | |
66 | int graphic_width = 800; | |
67 | int graphic_height = 600; | |
68 | int graphic_depth = 32; | |
69 | #endif | |
70 | ||
71 | ||
72 | #if defined(TARGET_ALPHA) | |
73 | #define QEMU_ARCH QEMU_ARCH_ALPHA | |
74 | #elif defined(TARGET_ARM) | |
75 | #define QEMU_ARCH QEMU_ARCH_ARM | |
76 | #elif defined(TARGET_CRIS) | |
77 | #define QEMU_ARCH QEMU_ARCH_CRIS | |
78 | #elif defined(TARGET_I386) | |
79 | #define QEMU_ARCH QEMU_ARCH_I386 | |
80 | #elif defined(TARGET_M68K) | |
81 | #define QEMU_ARCH QEMU_ARCH_M68K | |
82 | #elif defined(TARGET_LM32) | |
83 | #define QEMU_ARCH QEMU_ARCH_LM32 | |
84 | #elif defined(TARGET_MICROBLAZE) | |
85 | #define QEMU_ARCH QEMU_ARCH_MICROBLAZE | |
86 | #elif defined(TARGET_MIPS) | |
87 | #define QEMU_ARCH QEMU_ARCH_MIPS | |
88 | #elif defined(TARGET_MOXIE) | |
89 | #define QEMU_ARCH QEMU_ARCH_MOXIE | |
90 | #elif defined(TARGET_OPENRISC) | |
91 | #define QEMU_ARCH QEMU_ARCH_OPENRISC | |
92 | #elif defined(TARGET_PPC) | |
93 | #define QEMU_ARCH QEMU_ARCH_PPC | |
94 | #elif defined(TARGET_S390X) | |
95 | #define QEMU_ARCH QEMU_ARCH_S390X | |
96 | #elif defined(TARGET_SH4) | |
97 | #define QEMU_ARCH QEMU_ARCH_SH4 | |
98 | #elif defined(TARGET_SPARC) | |
99 | #define QEMU_ARCH QEMU_ARCH_SPARC | |
100 | #elif defined(TARGET_XTENSA) | |
101 | #define QEMU_ARCH QEMU_ARCH_XTENSA | |
102 | #elif defined(TARGET_UNICORE32) | |
103 | #define QEMU_ARCH QEMU_ARCH_UNICORE32 | |
104 | #endif | |
105 | ||
106 | const uint32_t arch_type = QEMU_ARCH; | |
107 | ||
108 | /***********************************************************/ | |
109 | /* ram save/restore */ | |
110 | ||
111 | #define RAM_SAVE_FLAG_FULL 0x01 /* Obsolete, not used anymore */ | |
112 | #define RAM_SAVE_FLAG_COMPRESS 0x02 | |
113 | #define RAM_SAVE_FLAG_MEM_SIZE 0x04 | |
114 | #define RAM_SAVE_FLAG_PAGE 0x08 | |
115 | #define RAM_SAVE_FLAG_EOS 0x10 | |
116 | #define RAM_SAVE_FLAG_CONTINUE 0x20 | |
117 | #define RAM_SAVE_FLAG_XBZRLE 0x40 | |
118 | ||
119 | ||
120 | static struct defconfig_file { | |
121 | const char *filename; | |
122 | /* Indicates it is an user config file (disabled by -no-user-config) */ | |
123 | bool userconfig; | |
124 | } default_config_files[] = { | |
125 | { CONFIG_QEMU_CONFDIR "/qemu.conf", true }, | |
126 | { CONFIG_QEMU_CONFDIR "/target-" TARGET_NAME ".conf", true }, | |
127 | { NULL }, /* end of list */ | |
128 | }; | |
129 | ||
130 | ||
131 | int qemu_read_default_config_files(bool userconfig) | |
132 | { | |
133 | int ret; | |
134 | struct defconfig_file *f; | |
135 | ||
136 | for (f = default_config_files; f->filename; f++) { | |
137 | if (!userconfig && f->userconfig) { | |
138 | continue; | |
139 | } | |
140 | ret = qemu_read_config_file(f->filename); | |
141 | if (ret < 0 && ret != -ENOENT) { | |
142 | return ret; | |
143 | } | |
144 | } | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static inline bool is_zero_page(uint8_t *p) | |
150 | { | |
151 | return buffer_find_nonzero_offset(p, TARGET_PAGE_SIZE) == | |
152 | TARGET_PAGE_SIZE; | |
153 | } | |
154 | ||
155 | /* struct contains XBZRLE cache and a static page | |
156 | used by the compression */ | |
157 | static struct { | |
158 | /* buffer used for XBZRLE encoding */ | |
159 | uint8_t *encoded_buf; | |
160 | /* buffer for storing page content */ | |
161 | uint8_t *current_buf; | |
162 | /* buffer used for XBZRLE decoding */ | |
163 | uint8_t *decoded_buf; | |
164 | /* Cache for XBZRLE */ | |
165 | PageCache *cache; | |
166 | } XBZRLE = { | |
167 | .encoded_buf = NULL, | |
168 | .current_buf = NULL, | |
169 | .decoded_buf = NULL, | |
170 | .cache = NULL, | |
171 | }; | |
172 | ||
173 | ||
174 | int64_t xbzrle_cache_resize(int64_t new_size) | |
175 | { | |
176 | if (XBZRLE.cache != NULL) { | |
177 | return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) * | |
178 | TARGET_PAGE_SIZE; | |
179 | } | |
180 | return pow2floor(new_size); | |
181 | } | |
182 | ||
183 | /* accounting for migration statistics */ | |
184 | typedef struct AccountingInfo { | |
185 | uint64_t dup_pages; | |
186 | uint64_t skipped_pages; | |
187 | uint64_t norm_pages; | |
188 | uint64_t iterations; | |
189 | uint64_t xbzrle_bytes; | |
190 | uint64_t xbzrle_pages; | |
191 | uint64_t xbzrle_cache_miss; | |
192 | uint64_t xbzrle_overflows; | |
193 | } AccountingInfo; | |
194 | ||
195 | static AccountingInfo acct_info; | |
196 | ||
197 | static void acct_clear(void) | |
198 | { | |
199 | memset(&acct_info, 0, sizeof(acct_info)); | |
200 | } | |
201 | ||
202 | uint64_t dup_mig_bytes_transferred(void) | |
203 | { | |
204 | return acct_info.dup_pages * TARGET_PAGE_SIZE; | |
205 | } | |
206 | ||
207 | uint64_t dup_mig_pages_transferred(void) | |
208 | { | |
209 | return acct_info.dup_pages; | |
210 | } | |
211 | ||
212 | uint64_t skipped_mig_bytes_transferred(void) | |
213 | { | |
214 | return acct_info.skipped_pages * TARGET_PAGE_SIZE; | |
215 | } | |
216 | ||
217 | uint64_t skipped_mig_pages_transferred(void) | |
218 | { | |
219 | return acct_info.skipped_pages; | |
220 | } | |
221 | ||
222 | uint64_t norm_mig_bytes_transferred(void) | |
223 | { | |
224 | return acct_info.norm_pages * TARGET_PAGE_SIZE; | |
225 | } | |
226 | ||
227 | uint64_t norm_mig_pages_transferred(void) | |
228 | { | |
229 | return acct_info.norm_pages; | |
230 | } | |
231 | ||
232 | uint64_t xbzrle_mig_bytes_transferred(void) | |
233 | { | |
234 | return acct_info.xbzrle_bytes; | |
235 | } | |
236 | ||
237 | uint64_t xbzrle_mig_pages_transferred(void) | |
238 | { | |
239 | return acct_info.xbzrle_pages; | |
240 | } | |
241 | ||
242 | uint64_t xbzrle_mig_pages_cache_miss(void) | |
243 | { | |
244 | return acct_info.xbzrle_cache_miss; | |
245 | } | |
246 | ||
247 | uint64_t xbzrle_mig_pages_overflow(void) | |
248 | { | |
249 | return acct_info.xbzrle_overflows; | |
250 | } | |
251 | ||
252 | static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset, | |
253 | int cont, int flag) | |
254 | { | |
255 | size_t size; | |
256 | ||
257 | qemu_put_be64(f, offset | cont | flag); | |
258 | size = 8; | |
259 | ||
260 | if (!cont) { | |
261 | qemu_put_byte(f, strlen(block->idstr)); | |
262 | qemu_put_buffer(f, (uint8_t *)block->idstr, | |
263 | strlen(block->idstr)); | |
264 | size += 1 + strlen(block->idstr); | |
265 | } | |
266 | return size; | |
267 | } | |
268 | ||
269 | #define ENCODING_FLAG_XBZRLE 0x1 | |
270 | ||
271 | static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data, | |
272 | ram_addr_t current_addr, RAMBlock *block, | |
273 | ram_addr_t offset, int cont, bool last_stage) | |
274 | { | |
275 | int encoded_len = 0, bytes_sent = -1; | |
276 | uint8_t *prev_cached_page; | |
277 | ||
278 | if (!cache_is_cached(XBZRLE.cache, current_addr)) { | |
279 | if (!last_stage) { | |
280 | cache_insert(XBZRLE.cache, current_addr, current_data); | |
281 | } | |
282 | acct_info.xbzrle_cache_miss++; | |
283 | return -1; | |
284 | } | |
285 | ||
286 | prev_cached_page = get_cached_data(XBZRLE.cache, current_addr); | |
287 | ||
288 | /* save current buffer into memory */ | |
289 | memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE); | |
290 | ||
291 | /* XBZRLE encoding (if there is no overflow) */ | |
292 | encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf, | |
293 | TARGET_PAGE_SIZE, XBZRLE.encoded_buf, | |
294 | TARGET_PAGE_SIZE); | |
295 | if (encoded_len == 0) { | |
296 | DPRINTF("Skipping unmodified page\n"); | |
297 | return 0; | |
298 | } else if (encoded_len == -1) { | |
299 | DPRINTF("Overflow\n"); | |
300 | acct_info.xbzrle_overflows++; | |
301 | /* update data in the cache */ | |
302 | memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE); | |
303 | return -1; | |
304 | } | |
305 | ||
306 | /* we need to update the data in the cache, in order to get the same data */ | |
307 | if (!last_stage) { | |
308 | memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE); | |
309 | } | |
310 | ||
311 | /* Send XBZRLE based compressed page */ | |
312 | bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE); | |
313 | qemu_put_byte(f, ENCODING_FLAG_XBZRLE); | |
314 | qemu_put_be16(f, encoded_len); | |
315 | qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len); | |
316 | bytes_sent += encoded_len + 1 + 2; | |
317 | acct_info.xbzrle_pages++; | |
318 | acct_info.xbzrle_bytes += bytes_sent; | |
319 | ||
320 | return bytes_sent; | |
321 | } | |
322 | ||
323 | ||
324 | /* This is the last block that we have visited serching for dirty pages | |
325 | */ | |
326 | static RAMBlock *last_seen_block; | |
327 | /* This is the last block from where we have sent data */ | |
328 | static RAMBlock *last_sent_block; | |
329 | static ram_addr_t last_offset; | |
330 | static unsigned long *migration_bitmap; | |
331 | static uint64_t migration_dirty_pages; | |
332 | static uint32_t last_version; | |
333 | static bool ram_bulk_stage; | |
334 | ||
335 | static inline | |
336 | ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr, | |
337 | ram_addr_t start) | |
338 | { | |
339 | unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS; | |
340 | unsigned long nr = base + (start >> TARGET_PAGE_BITS); | |
341 | unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS); | |
342 | ||
343 | unsigned long next; | |
344 | ||
345 | if (ram_bulk_stage && nr > base) { | |
346 | next = nr + 1; | |
347 | } else { | |
348 | next = find_next_bit(migration_bitmap, size, nr); | |
349 | } | |
350 | ||
351 | if (next < size) { | |
352 | clear_bit(next, migration_bitmap); | |
353 | migration_dirty_pages--; | |
354 | } | |
355 | return (next - base) << TARGET_PAGE_BITS; | |
356 | } | |
357 | ||
358 | static inline bool migration_bitmap_set_dirty(MemoryRegion *mr, | |
359 | ram_addr_t offset) | |
360 | { | |
361 | bool ret; | |
362 | int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS; | |
363 | ||
364 | ret = test_and_set_bit(nr, migration_bitmap); | |
365 | ||
366 | if (!ret) { | |
367 | migration_dirty_pages++; | |
368 | } | |
369 | return ret; | |
370 | } | |
371 | ||
372 | /* Needs iothread lock! */ | |
373 | ||
374 | static void migration_bitmap_sync(void) | |
375 | { | |
376 | RAMBlock *block; | |
377 | ram_addr_t addr; | |
378 | uint64_t num_dirty_pages_init = migration_dirty_pages; | |
379 | MigrationState *s = migrate_get_current(); | |
380 | static int64_t start_time; | |
381 | static int64_t num_dirty_pages_period; | |
382 | int64_t end_time; | |
383 | ||
384 | if (!start_time) { | |
385 | start_time = qemu_get_clock_ms(rt_clock); | |
386 | } | |
387 | ||
388 | trace_migration_bitmap_sync_start(); | |
389 | address_space_sync_dirty_bitmap(&address_space_memory); | |
390 | ||
391 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
392 | for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) { | |
393 | if (memory_region_test_and_clear_dirty(block->mr, | |
394 | addr, TARGET_PAGE_SIZE, | |
395 | DIRTY_MEMORY_MIGRATION)) { | |
396 | migration_bitmap_set_dirty(block->mr, addr); | |
397 | } | |
398 | } | |
399 | } | |
400 | trace_migration_bitmap_sync_end(migration_dirty_pages | |
401 | - num_dirty_pages_init); | |
402 | num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init; | |
403 | end_time = qemu_get_clock_ms(rt_clock); | |
404 | ||
405 | /* more than 1 second = 1000 millisecons */ | |
406 | if (end_time > start_time + 1000) { | |
407 | s->dirty_pages_rate = num_dirty_pages_period * 1000 | |
408 | / (end_time - start_time); | |
409 | s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE; | |
410 | start_time = end_time; | |
411 | num_dirty_pages_period = 0; | |
412 | } | |
413 | } | |
414 | ||
415 | /* | |
416 | * ram_save_block: Writes a page of memory to the stream f | |
417 | * | |
418 | * Returns: The number of bytes written. | |
419 | * 0 means no dirty pages | |
420 | */ | |
421 | ||
422 | static int ram_save_block(QEMUFile *f, bool last_stage) | |
423 | { | |
424 | RAMBlock *block = last_seen_block; | |
425 | ram_addr_t offset = last_offset; | |
426 | bool complete_round = false; | |
427 | int bytes_sent = 0; | |
428 | MemoryRegion *mr; | |
429 | ram_addr_t current_addr; | |
430 | ||
431 | if (!block) | |
432 | block = QTAILQ_FIRST(&ram_list.blocks); | |
433 | ||
434 | while (true) { | |
435 | mr = block->mr; | |
436 | offset = migration_bitmap_find_and_reset_dirty(mr, offset); | |
437 | if (complete_round && block == last_seen_block && | |
438 | offset >= last_offset) { | |
439 | break; | |
440 | } | |
441 | if (offset >= block->length) { | |
442 | offset = 0; | |
443 | block = QTAILQ_NEXT(block, next); | |
444 | if (!block) { | |
445 | block = QTAILQ_FIRST(&ram_list.blocks); | |
446 | complete_round = true; | |
447 | ram_bulk_stage = false; | |
448 | } | |
449 | } else { | |
450 | uint8_t *p; | |
451 | int cont = (block == last_sent_block) ? | |
452 | RAM_SAVE_FLAG_CONTINUE : 0; | |
453 | ||
454 | p = memory_region_get_ram_ptr(mr) + offset; | |
455 | ||
456 | /* In doubt sent page as normal */ | |
457 | bytes_sent = -1; | |
458 | if (is_zero_page(p)) { | |
459 | acct_info.dup_pages++; | |
460 | bytes_sent = save_block_hdr(f, block, offset, cont, | |
461 | RAM_SAVE_FLAG_COMPRESS); | |
462 | qemu_put_byte(f, 0); | |
463 | bytes_sent++; | |
464 | } else if (!ram_bulk_stage && migrate_use_xbzrle()) { | |
465 | current_addr = block->offset + offset; | |
466 | bytes_sent = save_xbzrle_page(f, p, current_addr, block, | |
467 | offset, cont, last_stage); | |
468 | if (!last_stage) { | |
469 | p = get_cached_data(XBZRLE.cache, current_addr); | |
470 | } | |
471 | } | |
472 | ||
473 | /* XBZRLE overflow or normal page */ | |
474 | if (bytes_sent == -1) { | |
475 | bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE); | |
476 | qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE); | |
477 | bytes_sent += TARGET_PAGE_SIZE; | |
478 | acct_info.norm_pages++; | |
479 | } | |
480 | ||
481 | /* if page is unmodified, continue to the next */ | |
482 | if (bytes_sent > 0) { | |
483 | last_sent_block = block; | |
484 | break; | |
485 | } | |
486 | } | |
487 | } | |
488 | last_seen_block = block; | |
489 | last_offset = offset; | |
490 | ||
491 | return bytes_sent; | |
492 | } | |
493 | ||
494 | static uint64_t bytes_transferred; | |
495 | ||
496 | void acct_update_position(QEMUFile *f, size_t size, bool zero) | |
497 | { | |
498 | uint64_t pages = size / TARGET_PAGE_SIZE; | |
499 | if (zero) { | |
500 | acct_info.dup_pages += pages; | |
501 | } else { | |
502 | acct_info.norm_pages += pages; | |
503 | bytes_transferred += size; | |
504 | qemu_update_position(f, size); | |
505 | } | |
506 | } | |
507 | ||
508 | static ram_addr_t ram_save_remaining(void) | |
509 | { | |
510 | return migration_dirty_pages; | |
511 | } | |
512 | ||
513 | uint64_t ram_bytes_remaining(void) | |
514 | { | |
515 | return ram_save_remaining() * TARGET_PAGE_SIZE; | |
516 | } | |
517 | ||
518 | uint64_t ram_bytes_transferred(void) | |
519 | { | |
520 | return bytes_transferred; | |
521 | } | |
522 | ||
523 | uint64_t ram_bytes_total(void) | |
524 | { | |
525 | RAMBlock *block; | |
526 | uint64_t total = 0; | |
527 | ||
528 | QTAILQ_FOREACH(block, &ram_list.blocks, next) | |
529 | total += block->length; | |
530 | ||
531 | return total; | |
532 | } | |
533 | ||
534 | static void migration_end(void) | |
535 | { | |
536 | if (migration_bitmap) { | |
537 | memory_global_dirty_log_stop(); | |
538 | g_free(migration_bitmap); | |
539 | migration_bitmap = NULL; | |
540 | } | |
541 | ||
542 | if (XBZRLE.cache) { | |
543 | cache_fini(XBZRLE.cache); | |
544 | g_free(XBZRLE.cache); | |
545 | g_free(XBZRLE.encoded_buf); | |
546 | g_free(XBZRLE.current_buf); | |
547 | g_free(XBZRLE.decoded_buf); | |
548 | XBZRLE.cache = NULL; | |
549 | } | |
550 | } | |
551 | ||
552 | static void ram_migration_cancel(void *opaque) | |
553 | { | |
554 | migration_end(); | |
555 | } | |
556 | ||
557 | static void reset_ram_globals(void) | |
558 | { | |
559 | last_seen_block = NULL; | |
560 | last_sent_block = NULL; | |
561 | last_offset = 0; | |
562 | last_version = ram_list.version; | |
563 | ram_bulk_stage = true; | |
564 | } | |
565 | ||
566 | #define MAX_WAIT 50 /* ms, half buffered_file limit */ | |
567 | ||
568 | static int ram_save_setup(QEMUFile *f, void *opaque) | |
569 | { | |
570 | RAMBlock *block; | |
571 | int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS; | |
572 | ||
573 | migration_bitmap = bitmap_new(ram_pages); | |
574 | bitmap_set(migration_bitmap, 0, ram_pages); | |
575 | migration_dirty_pages = ram_pages; | |
576 | ||
577 | if (migrate_use_xbzrle()) { | |
578 | XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() / | |
579 | TARGET_PAGE_SIZE, | |
580 | TARGET_PAGE_SIZE); | |
581 | if (!XBZRLE.cache) { | |
582 | DPRINTF("Error creating cache\n"); | |
583 | return -1; | |
584 | } | |
585 | XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE); | |
586 | XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE); | |
587 | acct_clear(); | |
588 | } | |
589 | ||
590 | qemu_mutex_lock_iothread(); | |
591 | qemu_mutex_lock_ramlist(); | |
592 | bytes_transferred = 0; | |
593 | reset_ram_globals(); | |
594 | ||
595 | memory_global_dirty_log_start(); | |
596 | migration_bitmap_sync(); | |
597 | qemu_mutex_unlock_iothread(); | |
598 | ||
599 | qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); | |
600 | ||
601 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
602 | qemu_put_byte(f, strlen(block->idstr)); | |
603 | qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); | |
604 | qemu_put_be64(f, block->length); | |
605 | } | |
606 | ||
607 | qemu_mutex_unlock_ramlist(); | |
608 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | static int ram_save_iterate(QEMUFile *f, void *opaque) | |
614 | { | |
615 | int ret; | |
616 | int i; | |
617 | int64_t t0; | |
618 | int total_sent = 0; | |
619 | ||
620 | qemu_mutex_lock_ramlist(); | |
621 | ||
622 | if (ram_list.version != last_version) { | |
623 | reset_ram_globals(); | |
624 | } | |
625 | ||
626 | t0 = qemu_get_clock_ns(rt_clock); | |
627 | i = 0; | |
628 | while ((ret = qemu_file_rate_limit(f)) == 0) { | |
629 | int bytes_sent; | |
630 | ||
631 | bytes_sent = ram_save_block(f, false); | |
632 | /* no more blocks to sent */ | |
633 | if (bytes_sent == 0) { | |
634 | break; | |
635 | } | |
636 | total_sent += bytes_sent; | |
637 | acct_info.iterations++; | |
638 | /* we want to check in the 1st loop, just in case it was the 1st time | |
639 | and we had to sync the dirty bitmap. | |
640 | qemu_get_clock_ns() is a bit expensive, so we only check each some | |
641 | iterations | |
642 | */ | |
643 | if ((i & 63) == 0) { | |
644 | uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000; | |
645 | if (t1 > MAX_WAIT) { | |
646 | DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n", | |
647 | t1, i); | |
648 | break; | |
649 | } | |
650 | } | |
651 | i++; | |
652 | } | |
653 | ||
654 | qemu_mutex_unlock_ramlist(); | |
655 | ||
656 | if (ret < 0) { | |
657 | bytes_transferred += total_sent; | |
658 | return ret; | |
659 | } | |
660 | ||
661 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
662 | total_sent += 8; | |
663 | bytes_transferred += total_sent; | |
664 | ||
665 | return total_sent; | |
666 | } | |
667 | ||
668 | static int ram_save_complete(QEMUFile *f, void *opaque) | |
669 | { | |
670 | qemu_mutex_lock_ramlist(); | |
671 | migration_bitmap_sync(); | |
672 | ||
673 | /* try transferring iterative blocks of memory */ | |
674 | ||
675 | /* flush all remaining blocks regardless of rate limiting */ | |
676 | while (true) { | |
677 | int bytes_sent; | |
678 | ||
679 | bytes_sent = ram_save_block(f, true); | |
680 | /* no more blocks to sent */ | |
681 | if (bytes_sent == 0) { | |
682 | break; | |
683 | } | |
684 | bytes_transferred += bytes_sent; | |
685 | } | |
686 | migration_end(); | |
687 | ||
688 | qemu_mutex_unlock_ramlist(); | |
689 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
690 | ||
691 | return 0; | |
692 | } | |
693 | ||
694 | static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size) | |
695 | { | |
696 | uint64_t remaining_size; | |
697 | ||
698 | remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE; | |
699 | ||
700 | if (remaining_size < max_size) { | |
701 | qemu_mutex_lock_iothread(); | |
702 | migration_bitmap_sync(); | |
703 | qemu_mutex_unlock_iothread(); | |
704 | remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE; | |
705 | } | |
706 | return remaining_size; | |
707 | } | |
708 | ||
709 | static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) | |
710 | { | |
711 | int ret, rc = 0; | |
712 | unsigned int xh_len; | |
713 | int xh_flags; | |
714 | ||
715 | if (!XBZRLE.decoded_buf) { | |
716 | XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE); | |
717 | } | |
718 | ||
719 | /* extract RLE header */ | |
720 | xh_flags = qemu_get_byte(f); | |
721 | xh_len = qemu_get_be16(f); | |
722 | ||
723 | if (xh_flags != ENCODING_FLAG_XBZRLE) { | |
724 | fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n"); | |
725 | return -1; | |
726 | } | |
727 | ||
728 | if (xh_len > TARGET_PAGE_SIZE) { | |
729 | fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n"); | |
730 | return -1; | |
731 | } | |
732 | /* load data and decode */ | |
733 | qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len); | |
734 | ||
735 | /* decode RLE */ | |
736 | ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host, | |
737 | TARGET_PAGE_SIZE); | |
738 | if (ret == -1) { | |
739 | fprintf(stderr, "Failed to load XBZRLE page - decode error!\n"); | |
740 | rc = -1; | |
741 | } else if (ret > TARGET_PAGE_SIZE) { | |
742 | fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n", | |
743 | ret, TARGET_PAGE_SIZE); | |
744 | abort(); | |
745 | } | |
746 | ||
747 | return rc; | |
748 | } | |
749 | ||
750 | static inline void *host_from_stream_offset(QEMUFile *f, | |
751 | ram_addr_t offset, | |
752 | int flags) | |
753 | { | |
754 | static RAMBlock *block = NULL; | |
755 | char id[256]; | |
756 | uint8_t len; | |
757 | ||
758 | if (flags & RAM_SAVE_FLAG_CONTINUE) { | |
759 | if (!block) { | |
760 | fprintf(stderr, "Ack, bad migration stream!\n"); | |
761 | return NULL; | |
762 | } | |
763 | ||
764 | return memory_region_get_ram_ptr(block->mr) + offset; | |
765 | } | |
766 | ||
767 | len = qemu_get_byte(f); | |
768 | qemu_get_buffer(f, (uint8_t *)id, len); | |
769 | id[len] = 0; | |
770 | ||
771 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
772 | if (!strncmp(id, block->idstr, sizeof(id))) | |
773 | return memory_region_get_ram_ptr(block->mr) + offset; | |
774 | } | |
775 | ||
776 | fprintf(stderr, "Can't find block %s!\n", id); | |
777 | return NULL; | |
778 | } | |
779 | ||
780 | static int ram_load(QEMUFile *f, void *opaque, int version_id) | |
781 | { | |
782 | ram_addr_t addr; | |
783 | int flags, ret = 0; | |
784 | int error; | |
785 | static uint64_t seq_iter; | |
786 | ||
787 | seq_iter++; | |
788 | ||
789 | if (version_id < 4 || version_id > 4) { | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
793 | do { | |
794 | addr = qemu_get_be64(f); | |
795 | ||
796 | flags = addr & ~TARGET_PAGE_MASK; | |
797 | addr &= TARGET_PAGE_MASK; | |
798 | ||
799 | if (flags & RAM_SAVE_FLAG_MEM_SIZE) { | |
800 | if (version_id == 4) { | |
801 | /* Synchronize RAM block list */ | |
802 | char id[256]; | |
803 | ram_addr_t length; | |
804 | ram_addr_t total_ram_bytes = addr; | |
805 | ||
806 | while (total_ram_bytes) { | |
807 | RAMBlock *block; | |
808 | uint8_t len; | |
809 | ||
810 | len = qemu_get_byte(f); | |
811 | qemu_get_buffer(f, (uint8_t *)id, len); | |
812 | id[len] = 0; | |
813 | length = qemu_get_be64(f); | |
814 | ||
815 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { | |
816 | if (!strncmp(id, block->idstr, sizeof(id))) { | |
817 | if (block->length != length) { | |
818 | fprintf(stderr, | |
819 | "Length mismatch: %s: " RAM_ADDR_FMT | |
820 | " in != " RAM_ADDR_FMT "\n", id, length, | |
821 | block->length); | |
822 | ret = -EINVAL; | |
823 | goto done; | |
824 | } | |
825 | break; | |
826 | } | |
827 | } | |
828 | ||
829 | if (!block) { | |
830 | fprintf(stderr, "Unknown ramblock \"%s\", cannot " | |
831 | "accept migration\n", id); | |
832 | ret = -EINVAL; | |
833 | goto done; | |
834 | } | |
835 | ||
836 | total_ram_bytes -= length; | |
837 | } | |
838 | } | |
839 | } | |
840 | ||
841 | if (flags & RAM_SAVE_FLAG_COMPRESS) { | |
842 | void *host; | |
843 | uint8_t ch; | |
844 | ||
845 | host = host_from_stream_offset(f, addr, flags); | |
846 | if (!host) { | |
847 | return -EINVAL; | |
848 | } | |
849 | ||
850 | ch = qemu_get_byte(f); | |
851 | if (ch != 0 || !is_zero_page(host)) { | |
852 | memset(host, ch, TARGET_PAGE_SIZE); | |
853 | #ifndef _WIN32 | |
854 | if (ch == 0 && | |
855 | (!kvm_enabled() || kvm_has_sync_mmu()) && | |
856 | getpagesize() <= TARGET_PAGE_SIZE) { | |
857 | qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED); | |
858 | } | |
859 | #endif | |
860 | } | |
861 | } else if (flags & RAM_SAVE_FLAG_PAGE) { | |
862 | void *host; | |
863 | ||
864 | host = host_from_stream_offset(f, addr, flags); | |
865 | if (!host) { | |
866 | return -EINVAL; | |
867 | } | |
868 | ||
869 | qemu_get_buffer(f, host, TARGET_PAGE_SIZE); | |
870 | } else if (flags & RAM_SAVE_FLAG_XBZRLE) { | |
871 | void *host = host_from_stream_offset(f, addr, flags); | |
872 | if (!host) { | |
873 | return -EINVAL; | |
874 | } | |
875 | ||
876 | if (load_xbzrle(f, addr, host) < 0) { | |
877 | ret = -EINVAL; | |
878 | goto done; | |
879 | } | |
880 | } | |
881 | error = qemu_file_get_error(f); | |
882 | if (error) { | |
883 | ret = error; | |
884 | goto done; | |
885 | } | |
886 | } while (!(flags & RAM_SAVE_FLAG_EOS)); | |
887 | ||
888 | done: | |
889 | DPRINTF("Completed load of VM with exit code %d seq iteration " | |
890 | "%" PRIu64 "\n", ret, seq_iter); | |
891 | return ret; | |
892 | } | |
893 | ||
894 | SaveVMHandlers savevm_ram_handlers = { | |
895 | .save_live_setup = ram_save_setup, | |
896 | .save_live_iterate = ram_save_iterate, | |
897 | .save_live_complete = ram_save_complete, | |
898 | .save_live_pending = ram_save_pending, | |
899 | .load_state = ram_load, | |
900 | .cancel = ram_migration_cancel, | |
901 | }; | |
902 | ||
903 | struct soundhw { | |
904 | const char *name; | |
905 | const char *descr; | |
906 | int enabled; | |
907 | int isa; | |
908 | union { | |
909 | int (*init_isa) (ISABus *bus); | |
910 | int (*init_pci) (PCIBus *bus); | |
911 | } init; | |
912 | }; | |
913 | ||
914 | static struct soundhw soundhw[9]; | |
915 | static int soundhw_count; | |
916 | ||
917 | void isa_register_soundhw(const char *name, const char *descr, | |
918 | int (*init_isa)(ISABus *bus)) | |
919 | { | |
920 | assert(soundhw_count < ARRAY_SIZE(soundhw) - 1); | |
921 | soundhw[soundhw_count].name = name; | |
922 | soundhw[soundhw_count].descr = descr; | |
923 | soundhw[soundhw_count].isa = 1; | |
924 | soundhw[soundhw_count].init.init_isa = init_isa; | |
925 | soundhw_count++; | |
926 | } | |
927 | ||
928 | void pci_register_soundhw(const char *name, const char *descr, | |
929 | int (*init_pci)(PCIBus *bus)) | |
930 | { | |
931 | assert(soundhw_count < ARRAY_SIZE(soundhw) - 1); | |
932 | soundhw[soundhw_count].name = name; | |
933 | soundhw[soundhw_count].descr = descr; | |
934 | soundhw[soundhw_count].isa = 0; | |
935 | soundhw[soundhw_count].init.init_pci = init_pci; | |
936 | soundhw_count++; | |
937 | } | |
938 | ||
939 | void select_soundhw(const char *optarg) | |
940 | { | |
941 | struct soundhw *c; | |
942 | ||
943 | if (is_help_option(optarg)) { | |
944 | show_valid_cards: | |
945 | ||
946 | if (soundhw_count) { | |
947 | printf("Valid sound card names (comma separated):\n"); | |
948 | for (c = soundhw; c->name; ++c) { | |
949 | printf ("%-11s %s\n", c->name, c->descr); | |
950 | } | |
951 | printf("\n-soundhw all will enable all of the above\n"); | |
952 | } else { | |
953 | printf("Machine has no user-selectable audio hardware " | |
954 | "(it may or may not have always-present audio hardware).\n"); | |
955 | } | |
956 | exit(!is_help_option(optarg)); | |
957 | } | |
958 | else { | |
959 | size_t l; | |
960 | const char *p; | |
961 | char *e; | |
962 | int bad_card = 0; | |
963 | ||
964 | if (!strcmp(optarg, "all")) { | |
965 | for (c = soundhw; c->name; ++c) { | |
966 | c->enabled = 1; | |
967 | } | |
968 | return; | |
969 | } | |
970 | ||
971 | p = optarg; | |
972 | while (*p) { | |
973 | e = strchr(p, ','); | |
974 | l = !e ? strlen(p) : (size_t) (e - p); | |
975 | ||
976 | for (c = soundhw; c->name; ++c) { | |
977 | if (!strncmp(c->name, p, l) && !c->name[l]) { | |
978 | c->enabled = 1; | |
979 | break; | |
980 | } | |
981 | } | |
982 | ||
983 | if (!c->name) { | |
984 | if (l > 80) { | |
985 | fprintf(stderr, | |
986 | "Unknown sound card name (too big to show)\n"); | |
987 | } | |
988 | else { | |
989 | fprintf(stderr, "Unknown sound card name `%.*s'\n", | |
990 | (int) l, p); | |
991 | } | |
992 | bad_card = 1; | |
993 | } | |
994 | p += l + (e != NULL); | |
995 | } | |
996 | ||
997 | if (bad_card) { | |
998 | goto show_valid_cards; | |
999 | } | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | void audio_init(void) | |
1004 | { | |
1005 | struct soundhw *c; | |
1006 | ISABus *isa_bus = (ISABus *) object_resolve_path_type("", TYPE_ISA_BUS, NULL); | |
1007 | PCIBus *pci_bus = (PCIBus *) object_resolve_path_type("", TYPE_PCI_BUS, NULL); | |
1008 | ||
1009 | for (c = soundhw; c->name; ++c) { | |
1010 | if (c->enabled) { | |
1011 | if (c->isa) { | |
1012 | if (!isa_bus) { | |
1013 | fprintf(stderr, "ISA bus not available for %s\n", c->name); | |
1014 | exit(1); | |
1015 | } | |
1016 | c->init.init_isa(isa_bus); | |
1017 | } else { | |
1018 | if (!pci_bus) { | |
1019 | fprintf(stderr, "PCI bus not available for %s\n", c->name); | |
1020 | exit(1); | |
1021 | } | |
1022 | c->init.init_pci(pci_bus); | |
1023 | } | |
1024 | } | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | int qemu_uuid_parse(const char *str, uint8_t *uuid) | |
1029 | { | |
1030 | int ret; | |
1031 | ||
1032 | if (strlen(str) != 36) { | |
1033 | return -1; | |
1034 | } | |
1035 | ||
1036 | ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], | |
1037 | &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], | |
1038 | &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], | |
1039 | &uuid[15]); | |
1040 | ||
1041 | if (ret != 16) { | |
1042 | return -1; | |
1043 | } | |
1044 | #ifdef TARGET_I386 | |
1045 | smbios_add_field(1, offsetof(struct smbios_type_1, uuid), uuid, 16); | |
1046 | #endif | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | void do_acpitable_option(const QemuOpts *opts) | |
1051 | { | |
1052 | #ifdef TARGET_I386 | |
1053 | Error *err = NULL; | |
1054 | ||
1055 | acpi_table_add(opts, &err); | |
1056 | if (err) { | |
1057 | fprintf(stderr, "Wrong acpi table provided: %s\n", | |
1058 | error_get_pretty(err)); | |
1059 | error_free(err); | |
1060 | exit(1); | |
1061 | } | |
1062 | #endif | |
1063 | } | |
1064 | ||
1065 | void do_smbios_option(const char *optarg) | |
1066 | { | |
1067 | #ifdef TARGET_I386 | |
1068 | if (smbios_entry_add(optarg) < 0) { | |
1069 | exit(1); | |
1070 | } | |
1071 | #endif | |
1072 | } | |
1073 | ||
1074 | void cpudef_init(void) | |
1075 | { | |
1076 | #if defined(cpudef_setup) | |
1077 | cpudef_setup(); /* parse cpu definitions in target config file */ | |
1078 | #endif | |
1079 | } | |
1080 | ||
1081 | int tcg_available(void) | |
1082 | { | |
1083 | return 1; | |
1084 | } | |
1085 | ||
1086 | int kvm_available(void) | |
1087 | { | |
1088 | #ifdef CONFIG_KVM | |
1089 | return 1; | |
1090 | #else | |
1091 | return 0; | |
1092 | #endif | |
1093 | } | |
1094 | ||
1095 | int xen_available(void) | |
1096 | { | |
1097 | #ifdef CONFIG_XEN | |
1098 | return 1; | |
1099 | #else | |
1100 | return 0; | |
1101 | #endif | |
1102 | } | |
1103 | ||
1104 | ||
1105 | TargetInfo *qmp_query_target(Error **errp) | |
1106 | { | |
1107 | TargetInfo *info = g_malloc0(sizeof(*info)); | |
1108 | ||
1109 | info->arch = g_strdup(TARGET_NAME); | |
1110 | ||
1111 | return info; | |
1112 | } |