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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.h" | |
33 | #include "sysemu.h" | |
34 | #include "bitops.h" | |
35 | #include "bitmap.h" | |
36 | #include "arch_init.h" | |
37 | #include "audio/audio.h" | |
38 | #include "hw/pc.h" | |
39 | #include "hw/pci.h" | |
40 | #include "hw/audiodev.h" | |
41 | #include "kvm.h" | |
42 | #include "migration.h" | |
43 | #include "net.h" | |
44 | #include "gdbstub.h" | |
45 | #include "hw/smbios.h" | |
46 | #include "exec-memory.h" | |
47 | #include "hw/pcspk.h" | |
48 | #include "qemu/page_cache.h" | |
49 | #include "qmp-commands.h" | |
50 | #include "trace.h" | |
51 | ||
52 | #ifdef DEBUG_ARCH_INIT | |
53 | #define DPRINTF(fmt, ...) \ | |
54 | do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0) | |
55 | #else | |
56 | #define DPRINTF(fmt, ...) \ | |
57 | do { } while (0) | |
58 | #endif | |
59 | ||
60 | #ifdef TARGET_SPARC | |
61 | int graphic_width = 1024; | |
62 | int graphic_height = 768; | |
63 | int graphic_depth = 8; | |
64 | #else | |
65 | int graphic_width = 800; | |
66 | int graphic_height = 600; | |
67 | int graphic_depth = 15; | |
68 | #endif | |
69 | ||
70 | ||
71 | #if defined(TARGET_ALPHA) | |
72 | #define QEMU_ARCH QEMU_ARCH_ALPHA | |
73 | #elif defined(TARGET_ARM) | |
74 | #define QEMU_ARCH QEMU_ARCH_ARM | |
75 | #elif defined(TARGET_CRIS) | |
76 | #define QEMU_ARCH QEMU_ARCH_CRIS | |
77 | #elif defined(TARGET_I386) | |
78 | #define QEMU_ARCH QEMU_ARCH_I386 | |
79 | #elif defined(TARGET_M68K) | |
80 | #define QEMU_ARCH QEMU_ARCH_M68K | |
81 | #elif defined(TARGET_LM32) | |
82 | #define QEMU_ARCH QEMU_ARCH_LM32 | |
83 | #elif defined(TARGET_MICROBLAZE) | |
84 | #define QEMU_ARCH QEMU_ARCH_MICROBLAZE | |
85 | #elif defined(TARGET_MIPS) | |
86 | #define QEMU_ARCH QEMU_ARCH_MIPS | |
87 | #elif defined(TARGET_OPENRISC) | |
88 | #define QEMU_ARCH QEMU_ARCH_OPENRISC | |
89 | #elif defined(TARGET_PPC) | |
90 | #define QEMU_ARCH QEMU_ARCH_PPC | |
91 | #elif defined(TARGET_S390X) | |
92 | #define QEMU_ARCH QEMU_ARCH_S390X | |
93 | #elif defined(TARGET_SH4) | |
94 | #define QEMU_ARCH QEMU_ARCH_SH4 | |
95 | #elif defined(TARGET_SPARC) | |
96 | #define QEMU_ARCH QEMU_ARCH_SPARC | |
97 | #elif defined(TARGET_XTENSA) | |
98 | #define QEMU_ARCH QEMU_ARCH_XTENSA | |
99 | #elif defined(TARGET_UNICORE32) | |
100 | #define QEMU_ARCH QEMU_ARCH_UNICORE32 | |
101 | #endif | |
102 | ||
103 | const uint32_t arch_type = QEMU_ARCH; | |
104 | ||
105 | /***********************************************************/ | |
106 | /* ram save/restore */ | |
107 | ||
108 | #define RAM_SAVE_FLAG_FULL 0x01 /* Obsolete, not used anymore */ | |
109 | #define RAM_SAVE_FLAG_COMPRESS 0x02 | |
110 | #define RAM_SAVE_FLAG_MEM_SIZE 0x04 | |
111 | #define RAM_SAVE_FLAG_PAGE 0x08 | |
112 | #define RAM_SAVE_FLAG_EOS 0x10 | |
113 | #define RAM_SAVE_FLAG_CONTINUE 0x20 | |
114 | #define RAM_SAVE_FLAG_XBZRLE 0x40 | |
115 | ||
116 | #ifdef __ALTIVEC__ | |
117 | #include <altivec.h> | |
118 | #define VECTYPE vector unsigned char | |
119 | #define SPLAT(p) vec_splat(vec_ld(0, p), 0) | |
120 | #define ALL_EQ(v1, v2) vec_all_eq(v1, v2) | |
121 | /* altivec.h may redefine the bool macro as vector type. | |
122 | * Reset it to POSIX semantics. */ | |
123 | #undef bool | |
124 | #define bool _Bool | |
125 | #elif defined __SSE2__ | |
126 | #include <emmintrin.h> | |
127 | #define VECTYPE __m128i | |
128 | #define SPLAT(p) _mm_set1_epi8(*(p)) | |
129 | #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF) | |
130 | #else | |
131 | #define VECTYPE unsigned long | |
132 | #define SPLAT(p) (*(p) * (~0UL / 255)) | |
133 | #define ALL_EQ(v1, v2) ((v1) == (v2)) | |
134 | #endif | |
135 | ||
136 | ||
137 | static struct defconfig_file { | |
138 | const char *filename; | |
139 | /* Indicates it is an user config file (disabled by -no-user-config) */ | |
140 | bool userconfig; | |
141 | } default_config_files[] = { | |
142 | { CONFIG_QEMU_CONFDIR "/qemu.conf", true }, | |
143 | { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true }, | |
144 | { NULL }, /* end of list */ | |
145 | }; | |
146 | ||
147 | ||
148 | int qemu_read_default_config_files(bool userconfig) | |
149 | { | |
150 | int ret; | |
151 | struct defconfig_file *f; | |
152 | ||
153 | for (f = default_config_files; f->filename; f++) { | |
154 | if (!userconfig && f->userconfig) { | |
155 | continue; | |
156 | } | |
157 | ret = qemu_read_config_file(f->filename); | |
158 | if (ret < 0 && ret != -ENOENT) { | |
159 | return ret; | |
160 | } | |
161 | } | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static int is_dup_page(uint8_t *page) | |
167 | { | |
168 | VECTYPE *p = (VECTYPE *)page; | |
169 | VECTYPE val = SPLAT(page); | |
170 | int i; | |
171 | ||
172 | for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) { | |
173 | if (!ALL_EQ(val, p[i])) { | |
174 | return 0; | |
175 | } | |
176 | } | |
177 | ||
178 | return 1; | |
179 | } | |
180 | ||
181 | /* struct contains XBZRLE cache and a static page | |
182 | used by the compression */ | |
183 | static struct { | |
184 | /* buffer used for XBZRLE encoding */ | |
185 | uint8_t *encoded_buf; | |
186 | /* buffer for storing page content */ | |
187 | uint8_t *current_buf; | |
188 | /* buffer used for XBZRLE decoding */ | |
189 | uint8_t *decoded_buf; | |
190 | /* Cache for XBZRLE */ | |
191 | PageCache *cache; | |
192 | } XBZRLE = { | |
193 | .encoded_buf = NULL, | |
194 | .current_buf = NULL, | |
195 | .decoded_buf = NULL, | |
196 | .cache = NULL, | |
197 | }; | |
198 | ||
199 | ||
200 | int64_t xbzrle_cache_resize(int64_t new_size) | |
201 | { | |
202 | if (XBZRLE.cache != NULL) { | |
203 | return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) * | |
204 | TARGET_PAGE_SIZE; | |
205 | } | |
206 | return pow2floor(new_size); | |
207 | } | |
208 | ||
209 | /* accounting for migration statistics */ | |
210 | typedef struct AccountingInfo { | |
211 | uint64_t dup_pages; | |
212 | uint64_t norm_pages; | |
213 | uint64_t iterations; | |
214 | uint64_t xbzrle_bytes; | |
215 | uint64_t xbzrle_pages; | |
216 | uint64_t xbzrle_cache_miss; | |
217 | uint64_t xbzrle_overflows; | |
218 | } AccountingInfo; | |
219 | ||
220 | static AccountingInfo acct_info; | |
221 | ||
222 | static void acct_clear(void) | |
223 | { | |
224 | memset(&acct_info, 0, sizeof(acct_info)); | |
225 | } | |
226 | ||
227 | uint64_t dup_mig_bytes_transferred(void) | |
228 | { | |
229 | return acct_info.dup_pages * TARGET_PAGE_SIZE; | |
230 | } | |
231 | ||
232 | uint64_t dup_mig_pages_transferred(void) | |
233 | { | |
234 | return acct_info.dup_pages; | |
235 | } | |
236 | ||
237 | uint64_t norm_mig_bytes_transferred(void) | |
238 | { | |
239 | return acct_info.norm_pages * TARGET_PAGE_SIZE; | |
240 | } | |
241 | ||
242 | uint64_t norm_mig_pages_transferred(void) | |
243 | { | |
244 | return acct_info.norm_pages; | |
245 | } | |
246 | ||
247 | uint64_t xbzrle_mig_bytes_transferred(void) | |
248 | { | |
249 | return acct_info.xbzrle_bytes; | |
250 | } | |
251 | ||
252 | uint64_t xbzrle_mig_pages_transferred(void) | |
253 | { | |
254 | return acct_info.xbzrle_pages; | |
255 | } | |
256 | ||
257 | uint64_t xbzrle_mig_pages_cache_miss(void) | |
258 | { | |
259 | return acct_info.xbzrle_cache_miss; | |
260 | } | |
261 | ||
262 | uint64_t xbzrle_mig_pages_overflow(void) | |
263 | { | |
264 | return acct_info.xbzrle_overflows; | |
265 | } | |
266 | ||
267 | static void save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset, | |
268 | int cont, int flag) | |
269 | { | |
270 | qemu_put_be64(f, offset | cont | flag); | |
271 | if (!cont) { | |
272 | qemu_put_byte(f, strlen(block->idstr)); | |
273 | qemu_put_buffer(f, (uint8_t *)block->idstr, | |
274 | strlen(block->idstr)); | |
275 | } | |
276 | ||
277 | } | |
278 | ||
279 | #define ENCODING_FLAG_XBZRLE 0x1 | |
280 | ||
281 | static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data, | |
282 | ram_addr_t current_addr, RAMBlock *block, | |
283 | ram_addr_t offset, int cont, bool last_stage) | |
284 | { | |
285 | int encoded_len = 0, bytes_sent = -1; | |
286 | uint8_t *prev_cached_page; | |
287 | ||
288 | if (!cache_is_cached(XBZRLE.cache, current_addr)) { | |
289 | if (!last_stage) { | |
290 | cache_insert(XBZRLE.cache, current_addr, | |
291 | g_memdup(current_data, TARGET_PAGE_SIZE)); | |
292 | } | |
293 | acct_info.xbzrle_cache_miss++; | |
294 | return -1; | |
295 | } | |
296 | ||
297 | prev_cached_page = get_cached_data(XBZRLE.cache, current_addr); | |
298 | ||
299 | /* save current buffer into memory */ | |
300 | memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE); | |
301 | ||
302 | /* XBZRLE encoding (if there is no overflow) */ | |
303 | encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf, | |
304 | TARGET_PAGE_SIZE, XBZRLE.encoded_buf, | |
305 | TARGET_PAGE_SIZE); | |
306 | if (encoded_len == 0) { | |
307 | DPRINTF("Skipping unmodified page\n"); | |
308 | return 0; | |
309 | } else if (encoded_len == -1) { | |
310 | DPRINTF("Overflow\n"); | |
311 | acct_info.xbzrle_overflows++; | |
312 | /* update data in the cache */ | |
313 | memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE); | |
314 | return -1; | |
315 | } | |
316 | ||
317 | /* we need to update the data in the cache, in order to get the same data */ | |
318 | if (!last_stage) { | |
319 | memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE); | |
320 | } | |
321 | ||
322 | /* Send XBZRLE based compressed page */ | |
323 | save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE); | |
324 | qemu_put_byte(f, ENCODING_FLAG_XBZRLE); | |
325 | qemu_put_be16(f, encoded_len); | |
326 | qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len); | |
327 | bytes_sent = encoded_len + 1 + 2; | |
328 | acct_info.xbzrle_pages++; | |
329 | acct_info.xbzrle_bytes += bytes_sent; | |
330 | ||
331 | return bytes_sent; | |
332 | } | |
333 | ||
334 | static RAMBlock *last_block; | |
335 | static ram_addr_t last_offset; | |
336 | static unsigned long *migration_bitmap; | |
337 | static uint64_t migration_dirty_pages; | |
338 | ||
339 | static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr, | |
340 | ram_addr_t offset) | |
341 | { | |
342 | bool ret; | |
343 | int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS; | |
344 | ||
345 | ret = test_and_clear_bit(nr, migration_bitmap); | |
346 | ||
347 | if (ret) { | |
348 | migration_dirty_pages--; | |
349 | } | |
350 | return ret; | |
351 | } | |
352 | ||
353 | static inline bool migration_bitmap_set_dirty(MemoryRegion *mr, | |
354 | ram_addr_t offset) | |
355 | { | |
356 | bool ret; | |
357 | int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS; | |
358 | ||
359 | ret = test_and_set_bit(nr, migration_bitmap); | |
360 | ||
361 | if (!ret) { | |
362 | migration_dirty_pages++; | |
363 | } | |
364 | return ret; | |
365 | } | |
366 | ||
367 | static void migration_bitmap_sync(void) | |
368 | { | |
369 | RAMBlock *block; | |
370 | ram_addr_t addr; | |
371 | uint64_t num_dirty_pages_init = migration_dirty_pages; | |
372 | MigrationState *s = migrate_get_current(); | |
373 | static int64_t start_time; | |
374 | static int64_t num_dirty_pages_period; | |
375 | int64_t end_time; | |
376 | ||
377 | if (!start_time) { | |
378 | start_time = qemu_get_clock_ms(rt_clock); | |
379 | } | |
380 | ||
381 | trace_migration_bitmap_sync_start(); | |
382 | memory_global_sync_dirty_bitmap(get_system_memory()); | |
383 | ||
384 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
385 | for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) { | |
386 | if (memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE, | |
387 | DIRTY_MEMORY_MIGRATION)) { | |
388 | migration_bitmap_set_dirty(block->mr, addr); | |
389 | } | |
390 | } | |
391 | memory_region_reset_dirty(block->mr, 0, block->length, | |
392 | DIRTY_MEMORY_MIGRATION); | |
393 | } | |
394 | trace_migration_bitmap_sync_end(migration_dirty_pages | |
395 | - num_dirty_pages_init); | |
396 | num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init; | |
397 | end_time = qemu_get_clock_ms(rt_clock); | |
398 | ||
399 | /* more than 1 second = 1000 millisecons */ | |
400 | if (end_time > start_time + 1000) { | |
401 | s->dirty_pages_rate = num_dirty_pages_period * 1000 | |
402 | / (end_time - start_time); | |
403 | start_time = end_time; | |
404 | num_dirty_pages_period = 0; | |
405 | } | |
406 | } | |
407 | ||
408 | ||
409 | /* | |
410 | * ram_save_block: Writes a page of memory to the stream f | |
411 | * | |
412 | * Returns: 0: if the page hasn't changed | |
413 | * -1: if there are no more dirty pages | |
414 | * n: the amount of bytes written in other case | |
415 | */ | |
416 | ||
417 | static int ram_save_block(QEMUFile *f, bool last_stage) | |
418 | { | |
419 | RAMBlock *block = last_block; | |
420 | ram_addr_t offset = last_offset; | |
421 | int bytes_sent = -1; | |
422 | MemoryRegion *mr; | |
423 | ram_addr_t current_addr; | |
424 | ||
425 | if (!block) | |
426 | block = QLIST_FIRST(&ram_list.blocks); | |
427 | ||
428 | do { | |
429 | mr = block->mr; | |
430 | if (migration_bitmap_test_and_reset_dirty(mr, offset)) { | |
431 | uint8_t *p; | |
432 | int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0; | |
433 | ||
434 | p = memory_region_get_ram_ptr(mr) + offset; | |
435 | ||
436 | if (is_dup_page(p)) { | |
437 | acct_info.dup_pages++; | |
438 | save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_COMPRESS); | |
439 | qemu_put_byte(f, *p); | |
440 | bytes_sent = 1; | |
441 | } else if (migrate_use_xbzrle()) { | |
442 | current_addr = block->offset + offset; | |
443 | bytes_sent = save_xbzrle_page(f, p, current_addr, block, | |
444 | offset, cont, last_stage); | |
445 | if (!last_stage) { | |
446 | p = get_cached_data(XBZRLE.cache, current_addr); | |
447 | } | |
448 | } | |
449 | ||
450 | /* either we didn't send yet (we may have had XBZRLE overflow) */ | |
451 | if (bytes_sent == -1) { | |
452 | save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE); | |
453 | qemu_put_buffer(f, p, TARGET_PAGE_SIZE); | |
454 | bytes_sent = TARGET_PAGE_SIZE; | |
455 | acct_info.norm_pages++; | |
456 | } | |
457 | ||
458 | /* if page is unmodified, continue to the next */ | |
459 | if (bytes_sent != 0) { | |
460 | break; | |
461 | } | |
462 | } | |
463 | ||
464 | offset += TARGET_PAGE_SIZE; | |
465 | if (offset >= block->length) { | |
466 | offset = 0; | |
467 | block = QLIST_NEXT(block, next); | |
468 | if (!block) | |
469 | block = QLIST_FIRST(&ram_list.blocks); | |
470 | } | |
471 | } while (block != last_block || offset != last_offset); | |
472 | ||
473 | last_block = block; | |
474 | last_offset = offset; | |
475 | ||
476 | return bytes_sent; | |
477 | } | |
478 | ||
479 | static uint64_t bytes_transferred; | |
480 | ||
481 | static ram_addr_t ram_save_remaining(void) | |
482 | { | |
483 | return migration_dirty_pages; | |
484 | } | |
485 | ||
486 | uint64_t ram_bytes_remaining(void) | |
487 | { | |
488 | return ram_save_remaining() * TARGET_PAGE_SIZE; | |
489 | } | |
490 | ||
491 | uint64_t ram_bytes_transferred(void) | |
492 | { | |
493 | return bytes_transferred; | |
494 | } | |
495 | ||
496 | uint64_t ram_bytes_total(void) | |
497 | { | |
498 | RAMBlock *block; | |
499 | uint64_t total = 0; | |
500 | ||
501 | QLIST_FOREACH(block, &ram_list.blocks, next) | |
502 | total += block->length; | |
503 | ||
504 | return total; | |
505 | } | |
506 | ||
507 | static int block_compar(const void *a, const void *b) | |
508 | { | |
509 | RAMBlock * const *ablock = a; | |
510 | RAMBlock * const *bblock = b; | |
511 | ||
512 | return strcmp((*ablock)->idstr, (*bblock)->idstr); | |
513 | } | |
514 | ||
515 | static void sort_ram_list(void) | |
516 | { | |
517 | RAMBlock *block, *nblock, **blocks; | |
518 | int n; | |
519 | n = 0; | |
520 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
521 | ++n; | |
522 | } | |
523 | blocks = g_malloc(n * sizeof *blocks); | |
524 | n = 0; | |
525 | QLIST_FOREACH_SAFE(block, &ram_list.blocks, next, nblock) { | |
526 | blocks[n++] = block; | |
527 | QLIST_REMOVE(block, next); | |
528 | } | |
529 | qsort(blocks, n, sizeof *blocks, block_compar); | |
530 | while (--n >= 0) { | |
531 | QLIST_INSERT_HEAD(&ram_list.blocks, blocks[n], next); | |
532 | } | |
533 | g_free(blocks); | |
534 | } | |
535 | ||
536 | static void migration_end(void) | |
537 | { | |
538 | memory_global_dirty_log_stop(); | |
539 | ||
540 | if (migrate_use_xbzrle()) { | |
541 | cache_fini(XBZRLE.cache); | |
542 | g_free(XBZRLE.cache); | |
543 | g_free(XBZRLE.encoded_buf); | |
544 | g_free(XBZRLE.current_buf); | |
545 | g_free(XBZRLE.decoded_buf); | |
546 | XBZRLE.cache = NULL; | |
547 | } | |
548 | } | |
549 | ||
550 | static void ram_migration_cancel(void *opaque) | |
551 | { | |
552 | migration_end(); | |
553 | } | |
554 | ||
555 | ||
556 | static void reset_ram_globals(void) | |
557 | { | |
558 | last_block = NULL; | |
559 | last_offset = 0; | |
560 | sort_ram_list(); | |
561 | } | |
562 | ||
563 | #define MAX_WAIT 50 /* ms, half buffered_file limit */ | |
564 | ||
565 | static int ram_save_setup(QEMUFile *f, void *opaque) | |
566 | { | |
567 | RAMBlock *block; | |
568 | int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS; | |
569 | ||
570 | migration_bitmap = bitmap_new(ram_pages); | |
571 | bitmap_set(migration_bitmap, 1, ram_pages); | |
572 | migration_dirty_pages = ram_pages; | |
573 | ||
574 | bytes_transferred = 0; | |
575 | reset_ram_globals(); | |
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 | memory_global_dirty_log_start(); | |
591 | migration_bitmap_sync(); | |
592 | ||
593 | qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); | |
594 | ||
595 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
596 | qemu_put_byte(f, strlen(block->idstr)); | |
597 | qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); | |
598 | qemu_put_be64(f, block->length); | |
599 | } | |
600 | ||
601 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
606 | static int ram_save_iterate(QEMUFile *f, void *opaque) | |
607 | { | |
608 | uint64_t bytes_transferred_last; | |
609 | double bwidth = 0; | |
610 | int ret; | |
611 | int i; | |
612 | uint64_t expected_downtime; | |
613 | MigrationState *s = migrate_get_current(); | |
614 | ||
615 | bytes_transferred_last = bytes_transferred; | |
616 | bwidth = qemu_get_clock_ns(rt_clock); | |
617 | ||
618 | i = 0; | |
619 | while ((ret = qemu_file_rate_limit(f)) == 0) { | |
620 | int bytes_sent; | |
621 | ||
622 | bytes_sent = ram_save_block(f, false); | |
623 | /* no more blocks to sent */ | |
624 | if (bytes_sent < 0) { | |
625 | break; | |
626 | } | |
627 | bytes_transferred += bytes_sent; | |
628 | acct_info.iterations++; | |
629 | /* we want to check in the 1st loop, just in case it was the 1st time | |
630 | and we had to sync the dirty bitmap. | |
631 | qemu_get_clock_ns() is a bit expensive, so we only check each some | |
632 | iterations | |
633 | */ | |
634 | if ((i & 63) == 0) { | |
635 | uint64_t t1 = (qemu_get_clock_ns(rt_clock) - bwidth) / 1000000; | |
636 | if (t1 > MAX_WAIT) { | |
637 | DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n", | |
638 | t1, i); | |
639 | break; | |
640 | } | |
641 | } | |
642 | i++; | |
643 | } | |
644 | ||
645 | if (ret < 0) { | |
646 | return ret; | |
647 | } | |
648 | ||
649 | bwidth = qemu_get_clock_ns(rt_clock) - bwidth; | |
650 | bwidth = (bytes_transferred - bytes_transferred_last) / bwidth; | |
651 | ||
652 | /* if we haven't transferred anything this round, force | |
653 | * expected_downtime to a very high value, but without | |
654 | * crashing */ | |
655 | if (bwidth == 0) { | |
656 | bwidth = 0.000001; | |
657 | } | |
658 | ||
659 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
660 | ||
661 | expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth; | |
662 | DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(" PRIu64 ")?\n", | |
663 | expected_downtime, migrate_max_downtime()); | |
664 | ||
665 | if (expected_downtime <= migrate_max_downtime()) { | |
666 | migration_bitmap_sync(); | |
667 | expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth; | |
668 | s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */ | |
669 | ||
670 | return expected_downtime <= migrate_max_downtime(); | |
671 | } | |
672 | return 0; | |
673 | } | |
674 | ||
675 | static int ram_save_complete(QEMUFile *f, void *opaque) | |
676 | { | |
677 | migration_bitmap_sync(); | |
678 | ||
679 | /* try transferring iterative blocks of memory */ | |
680 | ||
681 | /* flush all remaining blocks regardless of rate limiting */ | |
682 | while (true) { | |
683 | int bytes_sent; | |
684 | ||
685 | bytes_sent = ram_save_block(f, true); | |
686 | /* no more blocks to sent */ | |
687 | if (bytes_sent < 0) { | |
688 | break; | |
689 | } | |
690 | bytes_transferred += bytes_sent; | |
691 | } | |
692 | memory_global_dirty_log_stop(); | |
693 | ||
694 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
695 | ||
696 | g_free(migration_bitmap); | |
697 | migration_bitmap = NULL; | |
698 | ||
699 | return 0; | |
700 | } | |
701 | ||
702 | static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) | |
703 | { | |
704 | int ret, rc = 0; | |
705 | unsigned int xh_len; | |
706 | int xh_flags; | |
707 | ||
708 | if (!XBZRLE.decoded_buf) { | |
709 | XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE); | |
710 | } | |
711 | ||
712 | /* extract RLE header */ | |
713 | xh_flags = qemu_get_byte(f); | |
714 | xh_len = qemu_get_be16(f); | |
715 | ||
716 | if (xh_flags != ENCODING_FLAG_XBZRLE) { | |
717 | fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n"); | |
718 | return -1; | |
719 | } | |
720 | ||
721 | if (xh_len > TARGET_PAGE_SIZE) { | |
722 | fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n"); | |
723 | return -1; | |
724 | } | |
725 | /* load data and decode */ | |
726 | qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len); | |
727 | ||
728 | /* decode RLE */ | |
729 | ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host, | |
730 | TARGET_PAGE_SIZE); | |
731 | if (ret == -1) { | |
732 | fprintf(stderr, "Failed to load XBZRLE page - decode error!\n"); | |
733 | rc = -1; | |
734 | } else if (ret > TARGET_PAGE_SIZE) { | |
735 | fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n", | |
736 | ret, TARGET_PAGE_SIZE); | |
737 | abort(); | |
738 | } | |
739 | ||
740 | return rc; | |
741 | } | |
742 | ||
743 | static inline void *host_from_stream_offset(QEMUFile *f, | |
744 | ram_addr_t offset, | |
745 | int flags) | |
746 | { | |
747 | static RAMBlock *block = NULL; | |
748 | char id[256]; | |
749 | uint8_t len; | |
750 | ||
751 | if (flags & RAM_SAVE_FLAG_CONTINUE) { | |
752 | if (!block) { | |
753 | fprintf(stderr, "Ack, bad migration stream!\n"); | |
754 | return NULL; | |
755 | } | |
756 | ||
757 | return memory_region_get_ram_ptr(block->mr) + offset; | |
758 | } | |
759 | ||
760 | len = qemu_get_byte(f); | |
761 | qemu_get_buffer(f, (uint8_t *)id, len); | |
762 | id[len] = 0; | |
763 | ||
764 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
765 | if (!strncmp(id, block->idstr, sizeof(id))) | |
766 | return memory_region_get_ram_ptr(block->mr) + offset; | |
767 | } | |
768 | ||
769 | fprintf(stderr, "Can't find block %s!\n", id); | |
770 | return NULL; | |
771 | } | |
772 | ||
773 | static int ram_load(QEMUFile *f, void *opaque, int version_id) | |
774 | { | |
775 | ram_addr_t addr; | |
776 | int flags, ret = 0; | |
777 | int error; | |
778 | static uint64_t seq_iter; | |
779 | ||
780 | seq_iter++; | |
781 | ||
782 | if (version_id < 4 || version_id > 4) { | |
783 | return -EINVAL; | |
784 | } | |
785 | ||
786 | do { | |
787 | addr = qemu_get_be64(f); | |
788 | ||
789 | flags = addr & ~TARGET_PAGE_MASK; | |
790 | addr &= TARGET_PAGE_MASK; | |
791 | ||
792 | if (flags & RAM_SAVE_FLAG_MEM_SIZE) { | |
793 | if (version_id == 4) { | |
794 | /* Synchronize RAM block list */ | |
795 | char id[256]; | |
796 | ram_addr_t length; | |
797 | ram_addr_t total_ram_bytes = addr; | |
798 | ||
799 | while (total_ram_bytes) { | |
800 | RAMBlock *block; | |
801 | uint8_t len; | |
802 | ||
803 | len = qemu_get_byte(f); | |
804 | qemu_get_buffer(f, (uint8_t *)id, len); | |
805 | id[len] = 0; | |
806 | length = qemu_get_be64(f); | |
807 | ||
808 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
809 | if (!strncmp(id, block->idstr, sizeof(id))) { | |
810 | if (block->length != length) { | |
811 | ret = -EINVAL; | |
812 | goto done; | |
813 | } | |
814 | break; | |
815 | } | |
816 | } | |
817 | ||
818 | if (!block) { | |
819 | fprintf(stderr, "Unknown ramblock \"%s\", cannot " | |
820 | "accept migration\n", id); | |
821 | ret = -EINVAL; | |
822 | goto done; | |
823 | } | |
824 | ||
825 | total_ram_bytes -= length; | |
826 | } | |
827 | } | |
828 | } | |
829 | ||
830 | if (flags & RAM_SAVE_FLAG_COMPRESS) { | |
831 | void *host; | |
832 | uint8_t ch; | |
833 | ||
834 | host = host_from_stream_offset(f, addr, flags); | |
835 | if (!host) { | |
836 | return -EINVAL; | |
837 | } | |
838 | ||
839 | ch = qemu_get_byte(f); | |
840 | memset(host, ch, TARGET_PAGE_SIZE); | |
841 | #ifndef _WIN32 | |
842 | if (ch == 0 && | |
843 | (!kvm_enabled() || kvm_has_sync_mmu())) { | |
844 | qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED); | |
845 | } | |
846 | #endif | |
847 | } else if (flags & RAM_SAVE_FLAG_PAGE) { | |
848 | void *host; | |
849 | ||
850 | host = host_from_stream_offset(f, addr, flags); | |
851 | if (!host) { | |
852 | return -EINVAL; | |
853 | } | |
854 | ||
855 | qemu_get_buffer(f, host, TARGET_PAGE_SIZE); | |
856 | } else if (flags & RAM_SAVE_FLAG_XBZRLE) { | |
857 | if (!migrate_use_xbzrle()) { | |
858 | return -EINVAL; | |
859 | } | |
860 | void *host = host_from_stream_offset(f, addr, flags); | |
861 | if (!host) { | |
862 | return -EINVAL; | |
863 | } | |
864 | ||
865 | if (load_xbzrle(f, addr, host) < 0) { | |
866 | ret = -EINVAL; | |
867 | goto done; | |
868 | } | |
869 | } | |
870 | error = qemu_file_get_error(f); | |
871 | if (error) { | |
872 | ret = error; | |
873 | goto done; | |
874 | } | |
875 | } while (!(flags & RAM_SAVE_FLAG_EOS)); | |
876 | ||
877 | done: | |
878 | DPRINTF("Completed load of VM with exit code %d seq iteration " | |
879 | "%" PRIu64 "\n", ret, seq_iter); | |
880 | return ret; | |
881 | } | |
882 | ||
883 | SaveVMHandlers savevm_ram_handlers = { | |
884 | .save_live_setup = ram_save_setup, | |
885 | .save_live_iterate = ram_save_iterate, | |
886 | .save_live_complete = ram_save_complete, | |
887 | .load_state = ram_load, | |
888 | .cancel = ram_migration_cancel, | |
889 | }; | |
890 | ||
891 | #ifdef HAS_AUDIO | |
892 | struct soundhw { | |
893 | const char *name; | |
894 | const char *descr; | |
895 | int enabled; | |
896 | int isa; | |
897 | union { | |
898 | int (*init_isa) (ISABus *bus); | |
899 | int (*init_pci) (PCIBus *bus); | |
900 | } init; | |
901 | }; | |
902 | ||
903 | static struct soundhw soundhw[] = { | |
904 | #ifdef HAS_AUDIO_CHOICE | |
905 | #ifdef CONFIG_PCSPK | |
906 | { | |
907 | "pcspk", | |
908 | "PC speaker", | |
909 | 0, | |
910 | 1, | |
911 | { .init_isa = pcspk_audio_init } | |
912 | }, | |
913 | #endif | |
914 | ||
915 | #ifdef CONFIG_SB16 | |
916 | { | |
917 | "sb16", | |
918 | "Creative Sound Blaster 16", | |
919 | 0, | |
920 | 1, | |
921 | { .init_isa = SB16_init } | |
922 | }, | |
923 | #endif | |
924 | ||
925 | #ifdef CONFIG_CS4231A | |
926 | { | |
927 | "cs4231a", | |
928 | "CS4231A", | |
929 | 0, | |
930 | 1, | |
931 | { .init_isa = cs4231a_init } | |
932 | }, | |
933 | #endif | |
934 | ||
935 | #ifdef CONFIG_ADLIB | |
936 | { | |
937 | "adlib", | |
938 | #ifdef HAS_YMF262 | |
939 | "Yamaha YMF262 (OPL3)", | |
940 | #else | |
941 | "Yamaha YM3812 (OPL2)", | |
942 | #endif | |
943 | 0, | |
944 | 1, | |
945 | { .init_isa = Adlib_init } | |
946 | }, | |
947 | #endif | |
948 | ||
949 | #ifdef CONFIG_GUS | |
950 | { | |
951 | "gus", | |
952 | "Gravis Ultrasound GF1", | |
953 | 0, | |
954 | 1, | |
955 | { .init_isa = GUS_init } | |
956 | }, | |
957 | #endif | |
958 | ||
959 | #ifdef CONFIG_AC97 | |
960 | { | |
961 | "ac97", | |
962 | "Intel 82801AA AC97 Audio", | |
963 | 0, | |
964 | 0, | |
965 | { .init_pci = ac97_init } | |
966 | }, | |
967 | #endif | |
968 | ||
969 | #ifdef CONFIG_ES1370 | |
970 | { | |
971 | "es1370", | |
972 | "ENSONIQ AudioPCI ES1370", | |
973 | 0, | |
974 | 0, | |
975 | { .init_pci = es1370_init } | |
976 | }, | |
977 | #endif | |
978 | ||
979 | #ifdef CONFIG_HDA | |
980 | { | |
981 | "hda", | |
982 | "Intel HD Audio", | |
983 | 0, | |
984 | 0, | |
985 | { .init_pci = intel_hda_and_codec_init } | |
986 | }, | |
987 | #endif | |
988 | ||
989 | #endif /* HAS_AUDIO_CHOICE */ | |
990 | ||
991 | { NULL, NULL, 0, 0, { NULL } } | |
992 | }; | |
993 | ||
994 | void select_soundhw(const char *optarg) | |
995 | { | |
996 | struct soundhw *c; | |
997 | ||
998 | if (is_help_option(optarg)) { | |
999 | show_valid_cards: | |
1000 | ||
1001 | #ifdef HAS_AUDIO_CHOICE | |
1002 | printf("Valid sound card names (comma separated):\n"); | |
1003 | for (c = soundhw; c->name; ++c) { | |
1004 | printf ("%-11s %s\n", c->name, c->descr); | |
1005 | } | |
1006 | printf("\n-soundhw all will enable all of the above\n"); | |
1007 | #else | |
1008 | printf("Machine has no user-selectable audio hardware " | |
1009 | "(it may or may not have always-present audio hardware).\n"); | |
1010 | #endif | |
1011 | exit(!is_help_option(optarg)); | |
1012 | } | |
1013 | else { | |
1014 | size_t l; | |
1015 | const char *p; | |
1016 | char *e; | |
1017 | int bad_card = 0; | |
1018 | ||
1019 | if (!strcmp(optarg, "all")) { | |
1020 | for (c = soundhw; c->name; ++c) { | |
1021 | c->enabled = 1; | |
1022 | } | |
1023 | return; | |
1024 | } | |
1025 | ||
1026 | p = optarg; | |
1027 | while (*p) { | |
1028 | e = strchr(p, ','); | |
1029 | l = !e ? strlen(p) : (size_t) (e - p); | |
1030 | ||
1031 | for (c = soundhw; c->name; ++c) { | |
1032 | if (!strncmp(c->name, p, l) && !c->name[l]) { | |
1033 | c->enabled = 1; | |
1034 | break; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | if (!c->name) { | |
1039 | if (l > 80) { | |
1040 | fprintf(stderr, | |
1041 | "Unknown sound card name (too big to show)\n"); | |
1042 | } | |
1043 | else { | |
1044 | fprintf(stderr, "Unknown sound card name `%.*s'\n", | |
1045 | (int) l, p); | |
1046 | } | |
1047 | bad_card = 1; | |
1048 | } | |
1049 | p += l + (e != NULL); | |
1050 | } | |
1051 | ||
1052 | if (bad_card) { | |
1053 | goto show_valid_cards; | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | void audio_init(ISABus *isa_bus, PCIBus *pci_bus) | |
1059 | { | |
1060 | struct soundhw *c; | |
1061 | ||
1062 | for (c = soundhw; c->name; ++c) { | |
1063 | if (c->enabled) { | |
1064 | if (c->isa) { | |
1065 | if (isa_bus) { | |
1066 | c->init.init_isa(isa_bus); | |
1067 | } | |
1068 | } else { | |
1069 | if (pci_bus) { | |
1070 | c->init.init_pci(pci_bus); | |
1071 | } | |
1072 | } | |
1073 | } | |
1074 | } | |
1075 | } | |
1076 | #else | |
1077 | void select_soundhw(const char *optarg) | |
1078 | { | |
1079 | } | |
1080 | void audio_init(ISABus *isa_bus, PCIBus *pci_bus) | |
1081 | { | |
1082 | } | |
1083 | #endif | |
1084 | ||
1085 | int qemu_uuid_parse(const char *str, uint8_t *uuid) | |
1086 | { | |
1087 | int ret; | |
1088 | ||
1089 | if (strlen(str) != 36) { | |
1090 | return -1; | |
1091 | } | |
1092 | ||
1093 | ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], | |
1094 | &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], | |
1095 | &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], | |
1096 | &uuid[15]); | |
1097 | ||
1098 | if (ret != 16) { | |
1099 | return -1; | |
1100 | } | |
1101 | #ifdef TARGET_I386 | |
1102 | smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid); | |
1103 | #endif | |
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | void do_acpitable_option(const char *optarg) | |
1108 | { | |
1109 | #ifdef TARGET_I386 | |
1110 | if (acpi_table_add(optarg) < 0) { | |
1111 | fprintf(stderr, "Wrong acpi table provided\n"); | |
1112 | exit(1); | |
1113 | } | |
1114 | #endif | |
1115 | } | |
1116 | ||
1117 | void do_smbios_option(const char *optarg) | |
1118 | { | |
1119 | #ifdef TARGET_I386 | |
1120 | if (smbios_entry_add(optarg) < 0) { | |
1121 | fprintf(stderr, "Wrong smbios provided\n"); | |
1122 | exit(1); | |
1123 | } | |
1124 | #endif | |
1125 | } | |
1126 | ||
1127 | void cpudef_init(void) | |
1128 | { | |
1129 | #if defined(cpudef_setup) | |
1130 | cpudef_setup(); /* parse cpu definitions in target config file */ | |
1131 | #endif | |
1132 | } | |
1133 | ||
1134 | int audio_available(void) | |
1135 | { | |
1136 | #ifdef HAS_AUDIO | |
1137 | return 1; | |
1138 | #else | |
1139 | return 0; | |
1140 | #endif | |
1141 | } | |
1142 | ||
1143 | int tcg_available(void) | |
1144 | { | |
1145 | return 1; | |
1146 | } | |
1147 | ||
1148 | int kvm_available(void) | |
1149 | { | |
1150 | #ifdef CONFIG_KVM | |
1151 | return 1; | |
1152 | #else | |
1153 | return 0; | |
1154 | #endif | |
1155 | } | |
1156 | ||
1157 | int xen_available(void) | |
1158 | { | |
1159 | #ifdef CONFIG_XEN | |
1160 | return 1; | |
1161 | #else | |
1162 | return 0; | |
1163 | #endif | |
1164 | } | |
1165 | ||
1166 | ||
1167 | TargetInfo *qmp_query_target(Error **errp) | |
1168 | { | |
1169 | TargetInfo *info = g_malloc0(sizeof(*info)); | |
1170 | ||
1171 | info->arch = TARGET_TYPE; | |
1172 | ||
1173 | return info; | |
1174 | } |