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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/pc.h" | |
39 | #include "hw/pci/pci.h" | |
40 | #include "hw/audiodev.h" | |
41 | #include "sysemu/kvm.h" | |
42 | #include "migration/migration.h" | |
43 | #include "exec/gdbstub.h" | |
44 | #include "hw/smbios.h" | |
45 | #include "exec/address-spaces.h" | |
46 | #include "hw/pcspk.h" | |
47 | #include "migration/page_cache.h" | |
48 | #include "qemu/config-file.h" | |
49 | #include "qmp-commands.h" | |
50 | #include "trace.h" | |
51 | #include "exec/cpu-all.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 = 15; | |
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_OPENRISC) | |
89 | #define QEMU_ARCH QEMU_ARCH_OPENRISC | |
90 | #elif defined(TARGET_PPC) | |
91 | #define QEMU_ARCH QEMU_ARCH_PPC | |
92 | #elif defined(TARGET_S390X) | |
93 | #define QEMU_ARCH QEMU_ARCH_S390X | |
94 | #elif defined(TARGET_SH4) | |
95 | #define QEMU_ARCH QEMU_ARCH_SH4 | |
96 | #elif defined(TARGET_SPARC) | |
97 | #define QEMU_ARCH QEMU_ARCH_SPARC | |
98 | #elif defined(TARGET_XTENSA) | |
99 | #define QEMU_ARCH QEMU_ARCH_XTENSA | |
100 | #elif defined(TARGET_UNICORE32) | |
101 | #define QEMU_ARCH QEMU_ARCH_UNICORE32 | |
102 | #endif | |
103 | ||
104 | const uint32_t arch_type = QEMU_ARCH; | |
105 | ||
106 | /***********************************************************/ | |
107 | /* ram save/restore */ | |
108 | ||
109 | #define RAM_SAVE_FLAG_FULL 0x01 /* Obsolete, not used anymore */ | |
110 | #define RAM_SAVE_FLAG_COMPRESS 0x02 | |
111 | #define RAM_SAVE_FLAG_MEM_SIZE 0x04 | |
112 | #define RAM_SAVE_FLAG_PAGE 0x08 | |
113 | #define RAM_SAVE_FLAG_EOS 0x10 | |
114 | #define RAM_SAVE_FLAG_CONTINUE 0x20 | |
115 | #define RAM_SAVE_FLAG_XBZRLE 0x40 | |
116 | ||
117 | #ifdef __ALTIVEC__ | |
118 | #include <altivec.h> | |
119 | #define VECTYPE vector unsigned char | |
120 | #define SPLAT(p) vec_splat(vec_ld(0, p), 0) | |
121 | #define ALL_EQ(v1, v2) vec_all_eq(v1, v2) | |
122 | /* altivec.h may redefine the bool macro as vector type. | |
123 | * Reset it to POSIX semantics. */ | |
124 | #undef bool | |
125 | #define bool _Bool | |
126 | #elif defined __SSE2__ | |
127 | #include <emmintrin.h> | |
128 | #define VECTYPE __m128i | |
129 | #define SPLAT(p) _mm_set1_epi8(*(p)) | |
130 | #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF) | |
131 | #else | |
132 | #define VECTYPE unsigned long | |
133 | #define SPLAT(p) (*(p) * (~0UL / 255)) | |
134 | #define ALL_EQ(v1, v2) ((v1) == (v2)) | |
135 | #endif | |
136 | ||
137 | ||
138 | static struct defconfig_file { | |
139 | const char *filename; | |
140 | /* Indicates it is an user config file (disabled by -no-user-config) */ | |
141 | bool userconfig; | |
142 | } default_config_files[] = { | |
143 | { CONFIG_QEMU_CONFDIR "/qemu.conf", true }, | |
144 | { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true }, | |
145 | { NULL }, /* end of list */ | |
146 | }; | |
147 | ||
148 | ||
149 | int qemu_read_default_config_files(bool userconfig) | |
150 | { | |
151 | int ret; | |
152 | struct defconfig_file *f; | |
153 | ||
154 | for (f = default_config_files; f->filename; f++) { | |
155 | if (!userconfig && f->userconfig) { | |
156 | continue; | |
157 | } | |
158 | ret = qemu_read_config_file(f->filename); | |
159 | if (ret < 0 && ret != -ENOENT) { | |
160 | return ret; | |
161 | } | |
162 | } | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | static int is_dup_page(uint8_t *page) | |
168 | { | |
169 | VECTYPE *p = (VECTYPE *)page; | |
170 | VECTYPE val = SPLAT(page); | |
171 | int i; | |
172 | ||
173 | for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) { | |
174 | if (!ALL_EQ(val, p[i])) { | |
175 | return 0; | |
176 | } | |
177 | } | |
178 | ||
179 | return 1; | |
180 | } | |
181 | ||
182 | /* struct contains XBZRLE cache and a static page | |
183 | used by the compression */ | |
184 | static struct { | |
185 | /* buffer used for XBZRLE encoding */ | |
186 | uint8_t *encoded_buf; | |
187 | /* buffer for storing page content */ | |
188 | uint8_t *current_buf; | |
189 | /* buffer used for XBZRLE decoding */ | |
190 | uint8_t *decoded_buf; | |
191 | /* Cache for XBZRLE */ | |
192 | PageCache *cache; | |
193 | } XBZRLE = { | |
194 | .encoded_buf = NULL, | |
195 | .current_buf = NULL, | |
196 | .decoded_buf = NULL, | |
197 | .cache = NULL, | |
198 | }; | |
199 | ||
200 | ||
201 | int64_t xbzrle_cache_resize(int64_t new_size) | |
202 | { | |
203 | if (XBZRLE.cache != NULL) { | |
204 | return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) * | |
205 | TARGET_PAGE_SIZE; | |
206 | } | |
207 | return pow2floor(new_size); | |
208 | } | |
209 | ||
210 | /* accounting for migration statistics */ | |
211 | typedef struct AccountingInfo { | |
212 | uint64_t dup_pages; | |
213 | uint64_t norm_pages; | |
214 | uint64_t iterations; | |
215 | uint64_t xbzrle_bytes; | |
216 | uint64_t xbzrle_pages; | |
217 | uint64_t xbzrle_cache_miss; | |
218 | uint64_t xbzrle_overflows; | |
219 | } AccountingInfo; | |
220 | ||
221 | static AccountingInfo acct_info; | |
222 | ||
223 | static void acct_clear(void) | |
224 | { | |
225 | memset(&acct_info, 0, sizeof(acct_info)); | |
226 | } | |
227 | ||
228 | uint64_t dup_mig_bytes_transferred(void) | |
229 | { | |
230 | return acct_info.dup_pages * TARGET_PAGE_SIZE; | |
231 | } | |
232 | ||
233 | uint64_t dup_mig_pages_transferred(void) | |
234 | { | |
235 | return acct_info.dup_pages; | |
236 | } | |
237 | ||
238 | uint64_t norm_mig_bytes_transferred(void) | |
239 | { | |
240 | return acct_info.norm_pages * TARGET_PAGE_SIZE; | |
241 | } | |
242 | ||
243 | uint64_t norm_mig_pages_transferred(void) | |
244 | { | |
245 | return acct_info.norm_pages; | |
246 | } | |
247 | ||
248 | uint64_t xbzrle_mig_bytes_transferred(void) | |
249 | { | |
250 | return acct_info.xbzrle_bytes; | |
251 | } | |
252 | ||
253 | uint64_t xbzrle_mig_pages_transferred(void) | |
254 | { | |
255 | return acct_info.xbzrle_pages; | |
256 | } | |
257 | ||
258 | uint64_t xbzrle_mig_pages_cache_miss(void) | |
259 | { | |
260 | return acct_info.xbzrle_cache_miss; | |
261 | } | |
262 | ||
263 | uint64_t xbzrle_mig_pages_overflow(void) | |
264 | { | |
265 | return acct_info.xbzrle_overflows; | |
266 | } | |
267 | ||
268 | static void save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset, | |
269 | int cont, int flag) | |
270 | { | |
271 | qemu_put_be64(f, offset | cont | flag); | |
272 | if (!cont) { | |
273 | qemu_put_byte(f, strlen(block->idstr)); | |
274 | qemu_put_buffer(f, (uint8_t *)block->idstr, | |
275 | strlen(block->idstr)); | |
276 | } | |
277 | ||
278 | } | |
279 | ||
280 | #define ENCODING_FLAG_XBZRLE 0x1 | |
281 | ||
282 | static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data, | |
283 | ram_addr_t current_addr, RAMBlock *block, | |
284 | ram_addr_t offset, int cont, bool last_stage) | |
285 | { | |
286 | int encoded_len = 0, bytes_sent = -1; | |
287 | uint8_t *prev_cached_page; | |
288 | ||
289 | if (!cache_is_cached(XBZRLE.cache, current_addr)) { | |
290 | if (!last_stage) { | |
291 | cache_insert(XBZRLE.cache, current_addr, | |
292 | g_memdup(current_data, TARGET_PAGE_SIZE)); | |
293 | } | |
294 | acct_info.xbzrle_cache_miss++; | |
295 | return -1; | |
296 | } | |
297 | ||
298 | prev_cached_page = get_cached_data(XBZRLE.cache, current_addr); | |
299 | ||
300 | /* save current buffer into memory */ | |
301 | memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE); | |
302 | ||
303 | /* XBZRLE encoding (if there is no overflow) */ | |
304 | encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf, | |
305 | TARGET_PAGE_SIZE, XBZRLE.encoded_buf, | |
306 | TARGET_PAGE_SIZE); | |
307 | if (encoded_len == 0) { | |
308 | DPRINTF("Skipping unmodified page\n"); | |
309 | return 0; | |
310 | } else if (encoded_len == -1) { | |
311 | DPRINTF("Overflow\n"); | |
312 | acct_info.xbzrle_overflows++; | |
313 | /* update data in the cache */ | |
314 | memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE); | |
315 | return -1; | |
316 | } | |
317 | ||
318 | /* we need to update the data in the cache, in order to get the same data */ | |
319 | if (!last_stage) { | |
320 | memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE); | |
321 | } | |
322 | ||
323 | /* Send XBZRLE based compressed page */ | |
324 | save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE); | |
325 | qemu_put_byte(f, ENCODING_FLAG_XBZRLE); | |
326 | qemu_put_be16(f, encoded_len); | |
327 | qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len); | |
328 | bytes_sent = encoded_len + 1 + 2; | |
329 | acct_info.xbzrle_pages++; | |
330 | acct_info.xbzrle_bytes += bytes_sent; | |
331 | ||
332 | return bytes_sent; | |
333 | } | |
334 | ||
335 | static RAMBlock *last_block; | |
336 | static ram_addr_t last_offset; | |
337 | static unsigned long *migration_bitmap; | |
338 | static uint64_t migration_dirty_pages; | |
339 | ||
340 | static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr, | |
341 | ram_addr_t offset) | |
342 | { | |
343 | bool ret; | |
344 | int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS; | |
345 | ||
346 | ret = test_and_clear_bit(nr, migration_bitmap); | |
347 | ||
348 | if (ret) { | |
349 | migration_dirty_pages--; | |
350 | } | |
351 | return ret; | |
352 | } | |
353 | ||
354 | static inline bool migration_bitmap_set_dirty(MemoryRegion *mr, | |
355 | ram_addr_t offset) | |
356 | { | |
357 | bool ret; | |
358 | int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS; | |
359 | ||
360 | ret = test_and_set_bit(nr, migration_bitmap); | |
361 | ||
362 | if (!ret) { | |
363 | migration_dirty_pages++; | |
364 | } | |
365 | return ret; | |
366 | } | |
367 | ||
368 | static void migration_bitmap_sync(void) | |
369 | { | |
370 | RAMBlock *block; | |
371 | ram_addr_t addr; | |
372 | uint64_t num_dirty_pages_init = migration_dirty_pages; | |
373 | MigrationState *s = migrate_get_current(); | |
374 | static int64_t start_time; | |
375 | static int64_t num_dirty_pages_period; | |
376 | int64_t end_time; | |
377 | ||
378 | if (!start_time) { | |
379 | start_time = qemu_get_clock_ms(rt_clock); | |
380 | } | |
381 | ||
382 | trace_migration_bitmap_sync_start(); | |
383 | memory_global_sync_dirty_bitmap(get_system_memory()); | |
384 | ||
385 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
386 | for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) { | |
387 | if (memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE, | |
388 | DIRTY_MEMORY_MIGRATION)) { | |
389 | migration_bitmap_set_dirty(block->mr, addr); | |
390 | } | |
391 | } | |
392 | memory_region_reset_dirty(block->mr, 0, block->length, | |
393 | DIRTY_MEMORY_MIGRATION); | |
394 | } | |
395 | trace_migration_bitmap_sync_end(migration_dirty_pages | |
396 | - num_dirty_pages_init); | |
397 | num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init; | |
398 | end_time = qemu_get_clock_ms(rt_clock); | |
399 | ||
400 | /* more than 1 second = 1000 millisecons */ | |
401 | if (end_time > start_time + 1000) { | |
402 | s->dirty_pages_rate = num_dirty_pages_period * 1000 | |
403 | / (end_time - start_time); | |
404 | start_time = end_time; | |
405 | num_dirty_pages_period = 0; | |
406 | } | |
407 | } | |
408 | ||
409 | ||
410 | /* | |
411 | * ram_save_block: Writes a page of memory to the stream f | |
412 | * | |
413 | * Returns: 0: if the page hasn't changed | |
414 | * -1: if there are no more dirty pages | |
415 | * n: the amount of bytes written in other case | |
416 | */ | |
417 | ||
418 | static int ram_save_block(QEMUFile *f, bool last_stage) | |
419 | { | |
420 | RAMBlock *block = last_block; | |
421 | ram_addr_t offset = last_offset; | |
422 | int bytes_sent = -1; | |
423 | MemoryRegion *mr; | |
424 | ram_addr_t current_addr; | |
425 | ||
426 | if (!block) | |
427 | block = QLIST_FIRST(&ram_list.blocks); | |
428 | ||
429 | do { | |
430 | mr = block->mr; | |
431 | if (migration_bitmap_test_and_reset_dirty(mr, offset)) { | |
432 | uint8_t *p; | |
433 | int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0; | |
434 | ||
435 | p = memory_region_get_ram_ptr(mr) + offset; | |
436 | ||
437 | if (is_dup_page(p)) { | |
438 | acct_info.dup_pages++; | |
439 | save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_COMPRESS); | |
440 | qemu_put_byte(f, *p); | |
441 | bytes_sent = 1; | |
442 | } else if (migrate_use_xbzrle()) { | |
443 | current_addr = block->offset + offset; | |
444 | bytes_sent = save_xbzrle_page(f, p, current_addr, block, | |
445 | offset, cont, last_stage); | |
446 | if (!last_stage) { | |
447 | p = get_cached_data(XBZRLE.cache, current_addr); | |
448 | } | |
449 | } | |
450 | ||
451 | /* either we didn't send yet (we may have had XBZRLE overflow) */ | |
452 | if (bytes_sent == -1) { | |
453 | save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE); | |
454 | qemu_put_buffer(f, p, TARGET_PAGE_SIZE); | |
455 | bytes_sent = TARGET_PAGE_SIZE; | |
456 | acct_info.norm_pages++; | |
457 | } | |
458 | ||
459 | /* if page is unmodified, continue to the next */ | |
460 | if (bytes_sent != 0) { | |
461 | break; | |
462 | } | |
463 | } | |
464 | ||
465 | offset += TARGET_PAGE_SIZE; | |
466 | if (offset >= block->length) { | |
467 | offset = 0; | |
468 | block = QLIST_NEXT(block, next); | |
469 | if (!block) | |
470 | block = QLIST_FIRST(&ram_list.blocks); | |
471 | } | |
472 | } while (block != last_block || offset != last_offset); | |
473 | ||
474 | last_block = block; | |
475 | last_offset = offset; | |
476 | ||
477 | return bytes_sent; | |
478 | } | |
479 | ||
480 | static uint64_t bytes_transferred; | |
481 | ||
482 | static ram_addr_t ram_save_remaining(void) | |
483 | { | |
484 | return migration_dirty_pages; | |
485 | } | |
486 | ||
487 | uint64_t ram_bytes_remaining(void) | |
488 | { | |
489 | return ram_save_remaining() * TARGET_PAGE_SIZE; | |
490 | } | |
491 | ||
492 | uint64_t ram_bytes_transferred(void) | |
493 | { | |
494 | return bytes_transferred; | |
495 | } | |
496 | ||
497 | uint64_t ram_bytes_total(void) | |
498 | { | |
499 | RAMBlock *block; | |
500 | uint64_t total = 0; | |
501 | ||
502 | QLIST_FOREACH(block, &ram_list.blocks, next) | |
503 | total += block->length; | |
504 | ||
505 | return total; | |
506 | } | |
507 | ||
508 | static int block_compar(const void *a, const void *b) | |
509 | { | |
510 | RAMBlock * const *ablock = a; | |
511 | RAMBlock * const *bblock = b; | |
512 | ||
513 | return strcmp((*ablock)->idstr, (*bblock)->idstr); | |
514 | } | |
515 | ||
516 | static void sort_ram_list(void) | |
517 | { | |
518 | RAMBlock *block, *nblock, **blocks; | |
519 | int n; | |
520 | n = 0; | |
521 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
522 | ++n; | |
523 | } | |
524 | blocks = g_malloc(n * sizeof *blocks); | |
525 | n = 0; | |
526 | QLIST_FOREACH_SAFE(block, &ram_list.blocks, next, nblock) { | |
527 | blocks[n++] = block; | |
528 | QLIST_REMOVE(block, next); | |
529 | } | |
530 | qsort(blocks, n, sizeof *blocks, block_compar); | |
531 | while (--n >= 0) { | |
532 | QLIST_INSERT_HEAD(&ram_list.blocks, blocks[n], next); | |
533 | } | |
534 | g_free(blocks); | |
535 | } | |
536 | ||
537 | static void migration_end(void) | |
538 | { | |
539 | if (migration_bitmap) { | |
540 | memory_global_dirty_log_stop(); | |
541 | g_free(migration_bitmap); | |
542 | migration_bitmap = NULL; | |
543 | } | |
544 | ||
545 | if (XBZRLE.cache) { | |
546 | cache_fini(XBZRLE.cache); | |
547 | g_free(XBZRLE.cache); | |
548 | g_free(XBZRLE.encoded_buf); | |
549 | g_free(XBZRLE.current_buf); | |
550 | g_free(XBZRLE.decoded_buf); | |
551 | XBZRLE.cache = NULL; | |
552 | } | |
553 | } | |
554 | ||
555 | static void ram_migration_cancel(void *opaque) | |
556 | { | |
557 | migration_end(); | |
558 | } | |
559 | ||
560 | ||
561 | static void reset_ram_globals(void) | |
562 | { | |
563 | last_block = NULL; | |
564 | last_offset = 0; | |
565 | sort_ram_list(); | |
566 | } | |
567 | ||
568 | #define MAX_WAIT 50 /* ms, half buffered_file limit */ | |
569 | ||
570 | static int ram_save_setup(QEMUFile *f, void *opaque) | |
571 | { | |
572 | RAMBlock *block; | |
573 | int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS; | |
574 | ||
575 | migration_bitmap = bitmap_new(ram_pages); | |
576 | bitmap_set(migration_bitmap, 0, ram_pages); | |
577 | migration_dirty_pages = ram_pages; | |
578 | ||
579 | bytes_transferred = 0; | |
580 | reset_ram_globals(); | |
581 | ||
582 | if (migrate_use_xbzrle()) { | |
583 | XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() / | |
584 | TARGET_PAGE_SIZE, | |
585 | TARGET_PAGE_SIZE); | |
586 | if (!XBZRLE.cache) { | |
587 | DPRINTF("Error creating cache\n"); | |
588 | return -1; | |
589 | } | |
590 | XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE); | |
591 | XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE); | |
592 | acct_clear(); | |
593 | } | |
594 | ||
595 | memory_global_dirty_log_start(); | |
596 | migration_bitmap_sync(); | |
597 | ||
598 | qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); | |
599 | ||
600 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
601 | qemu_put_byte(f, strlen(block->idstr)); | |
602 | qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); | |
603 | qemu_put_be64(f, block->length); | |
604 | } | |
605 | ||
606 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
607 | ||
608 | return 0; | |
609 | } | |
610 | ||
611 | static int ram_save_iterate(QEMUFile *f, void *opaque) | |
612 | { | |
613 | uint64_t bytes_transferred_last; | |
614 | double bwidth = 0; | |
615 | int ret; | |
616 | int i; | |
617 | uint64_t expected_downtime; | |
618 | MigrationState *s = migrate_get_current(); | |
619 | ||
620 | bytes_transferred_last = bytes_transferred; | |
621 | bwidth = qemu_get_clock_ns(rt_clock); | |
622 | ||
623 | i = 0; | |
624 | while ((ret = qemu_file_rate_limit(f)) == 0) { | |
625 | int bytes_sent; | |
626 | ||
627 | bytes_sent = ram_save_block(f, false); | |
628 | /* no more blocks to sent */ | |
629 | if (bytes_sent < 0) { | |
630 | break; | |
631 | } | |
632 | bytes_transferred += bytes_sent; | |
633 | acct_info.iterations++; | |
634 | /* we want to check in the 1st loop, just in case it was the 1st time | |
635 | and we had to sync the dirty bitmap. | |
636 | qemu_get_clock_ns() is a bit expensive, so we only check each some | |
637 | iterations | |
638 | */ | |
639 | if ((i & 63) == 0) { | |
640 | uint64_t t1 = (qemu_get_clock_ns(rt_clock) - bwidth) / 1000000; | |
641 | if (t1 > MAX_WAIT) { | |
642 | DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n", | |
643 | t1, i); | |
644 | break; | |
645 | } | |
646 | } | |
647 | i++; | |
648 | } | |
649 | ||
650 | if (ret < 0) { | |
651 | return ret; | |
652 | } | |
653 | ||
654 | bwidth = qemu_get_clock_ns(rt_clock) - bwidth; | |
655 | bwidth = (bytes_transferred - bytes_transferred_last) / bwidth; | |
656 | ||
657 | /* if we haven't transferred anything this round, force | |
658 | * expected_downtime to a very high value, but without | |
659 | * crashing */ | |
660 | if (bwidth == 0) { | |
661 | bwidth = 0.000001; | |
662 | } | |
663 | ||
664 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
665 | ||
666 | expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth; | |
667 | DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(" PRIu64 ")?\n", | |
668 | expected_downtime, migrate_max_downtime()); | |
669 | ||
670 | if (expected_downtime <= migrate_max_downtime()) { | |
671 | migration_bitmap_sync(); | |
672 | expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth; | |
673 | s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */ | |
674 | ||
675 | return expected_downtime <= migrate_max_downtime(); | |
676 | } | |
677 | return 0; | |
678 | } | |
679 | ||
680 | static int ram_save_complete(QEMUFile *f, void *opaque) | |
681 | { | |
682 | migration_bitmap_sync(); | |
683 | ||
684 | /* try transferring iterative blocks of memory */ | |
685 | ||
686 | /* flush all remaining blocks regardless of rate limiting */ | |
687 | while (true) { | |
688 | int bytes_sent; | |
689 | ||
690 | bytes_sent = ram_save_block(f, true); | |
691 | /* no more blocks to sent */ | |
692 | if (bytes_sent < 0) { | |
693 | break; | |
694 | } | |
695 | bytes_transferred += bytes_sent; | |
696 | } | |
697 | migration_end(); | |
698 | ||
699 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
700 | ||
701 | return 0; | |
702 | } | |
703 | ||
704 | static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) | |
705 | { | |
706 | int ret, rc = 0; | |
707 | unsigned int xh_len; | |
708 | int xh_flags; | |
709 | ||
710 | if (!XBZRLE.decoded_buf) { | |
711 | XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE); | |
712 | } | |
713 | ||
714 | /* extract RLE header */ | |
715 | xh_flags = qemu_get_byte(f); | |
716 | xh_len = qemu_get_be16(f); | |
717 | ||
718 | if (xh_flags != ENCODING_FLAG_XBZRLE) { | |
719 | fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n"); | |
720 | return -1; | |
721 | } | |
722 | ||
723 | if (xh_len > TARGET_PAGE_SIZE) { | |
724 | fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n"); | |
725 | return -1; | |
726 | } | |
727 | /* load data and decode */ | |
728 | qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len); | |
729 | ||
730 | /* decode RLE */ | |
731 | ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host, | |
732 | TARGET_PAGE_SIZE); | |
733 | if (ret == -1) { | |
734 | fprintf(stderr, "Failed to load XBZRLE page - decode error!\n"); | |
735 | rc = -1; | |
736 | } else if (ret > TARGET_PAGE_SIZE) { | |
737 | fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n", | |
738 | ret, TARGET_PAGE_SIZE); | |
739 | abort(); | |
740 | } | |
741 | ||
742 | return rc; | |
743 | } | |
744 | ||
745 | static inline void *host_from_stream_offset(QEMUFile *f, | |
746 | ram_addr_t offset, | |
747 | int flags) | |
748 | { | |
749 | static RAMBlock *block = NULL; | |
750 | char id[256]; | |
751 | uint8_t len; | |
752 | ||
753 | if (flags & RAM_SAVE_FLAG_CONTINUE) { | |
754 | if (!block) { | |
755 | fprintf(stderr, "Ack, bad migration stream!\n"); | |
756 | return NULL; | |
757 | } | |
758 | ||
759 | return memory_region_get_ram_ptr(block->mr) + offset; | |
760 | } | |
761 | ||
762 | len = qemu_get_byte(f); | |
763 | qemu_get_buffer(f, (uint8_t *)id, len); | |
764 | id[len] = 0; | |
765 | ||
766 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
767 | if (!strncmp(id, block->idstr, sizeof(id))) | |
768 | return memory_region_get_ram_ptr(block->mr) + offset; | |
769 | } | |
770 | ||
771 | fprintf(stderr, "Can't find block %s!\n", id); | |
772 | return NULL; | |
773 | } | |
774 | ||
775 | static int ram_load(QEMUFile *f, void *opaque, int version_id) | |
776 | { | |
777 | ram_addr_t addr; | |
778 | int flags, ret = 0; | |
779 | int error; | |
780 | static uint64_t seq_iter; | |
781 | ||
782 | seq_iter++; | |
783 | ||
784 | if (version_id < 4 || version_id > 4) { | |
785 | return -EINVAL; | |
786 | } | |
787 | ||
788 | do { | |
789 | addr = qemu_get_be64(f); | |
790 | ||
791 | flags = addr & ~TARGET_PAGE_MASK; | |
792 | addr &= TARGET_PAGE_MASK; | |
793 | ||
794 | if (flags & RAM_SAVE_FLAG_MEM_SIZE) { | |
795 | if (version_id == 4) { | |
796 | /* Synchronize RAM block list */ | |
797 | char id[256]; | |
798 | ram_addr_t length; | |
799 | ram_addr_t total_ram_bytes = addr; | |
800 | ||
801 | while (total_ram_bytes) { | |
802 | RAMBlock *block; | |
803 | uint8_t len; | |
804 | ||
805 | len = qemu_get_byte(f); | |
806 | qemu_get_buffer(f, (uint8_t *)id, len); | |
807 | id[len] = 0; | |
808 | length = qemu_get_be64(f); | |
809 | ||
810 | QLIST_FOREACH(block, &ram_list.blocks, next) { | |
811 | if (!strncmp(id, block->idstr, sizeof(id))) { | |
812 | if (block->length != length) { | |
813 | ret = -EINVAL; | |
814 | goto done; | |
815 | } | |
816 | break; | |
817 | } | |
818 | } | |
819 | ||
820 | if (!block) { | |
821 | fprintf(stderr, "Unknown ramblock \"%s\", cannot " | |
822 | "accept migration\n", id); | |
823 | ret = -EINVAL; | |
824 | goto done; | |
825 | } | |
826 | ||
827 | total_ram_bytes -= length; | |
828 | } | |
829 | } | |
830 | } | |
831 | ||
832 | if (flags & RAM_SAVE_FLAG_COMPRESS) { | |
833 | void *host; | |
834 | uint8_t ch; | |
835 | ||
836 | host = host_from_stream_offset(f, addr, flags); | |
837 | if (!host) { | |
838 | return -EINVAL; | |
839 | } | |
840 | ||
841 | ch = qemu_get_byte(f); | |
842 | memset(host, ch, TARGET_PAGE_SIZE); | |
843 | #ifndef _WIN32 | |
844 | if (ch == 0 && | |
845 | (!kvm_enabled() || kvm_has_sync_mmu()) && | |
846 | getpagesize() <= TARGET_PAGE_SIZE) { | |
847 | qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED); | |
848 | } | |
849 | #endif | |
850 | } else if (flags & RAM_SAVE_FLAG_PAGE) { | |
851 | void *host; | |
852 | ||
853 | host = host_from_stream_offset(f, addr, flags); | |
854 | if (!host) { | |
855 | return -EINVAL; | |
856 | } | |
857 | ||
858 | qemu_get_buffer(f, host, TARGET_PAGE_SIZE); | |
859 | } else if (flags & RAM_SAVE_FLAG_XBZRLE) { | |
860 | if (!migrate_use_xbzrle()) { | |
861 | return -EINVAL; | |
862 | } | |
863 | void *host = host_from_stream_offset(f, addr, flags); | |
864 | if (!host) { | |
865 | return -EINVAL; | |
866 | } | |
867 | ||
868 | if (load_xbzrle(f, addr, host) < 0) { | |
869 | ret = -EINVAL; | |
870 | goto done; | |
871 | } | |
872 | } | |
873 | error = qemu_file_get_error(f); | |
874 | if (error) { | |
875 | ret = error; | |
876 | goto done; | |
877 | } | |
878 | } while (!(flags & RAM_SAVE_FLAG_EOS)); | |
879 | ||
880 | done: | |
881 | DPRINTF("Completed load of VM with exit code %d seq iteration " | |
882 | "%" PRIu64 "\n", ret, seq_iter); | |
883 | return ret; | |
884 | } | |
885 | ||
886 | SaveVMHandlers savevm_ram_handlers = { | |
887 | .save_live_setup = ram_save_setup, | |
888 | .save_live_iterate = ram_save_iterate, | |
889 | .save_live_complete = ram_save_complete, | |
890 | .load_state = ram_load, | |
891 | .cancel = ram_migration_cancel, | |
892 | }; | |
893 | ||
894 | #ifdef HAS_AUDIO | |
895 | struct soundhw { | |
896 | const char *name; | |
897 | const char *descr; | |
898 | int enabled; | |
899 | int isa; | |
900 | union { | |
901 | int (*init_isa) (ISABus *bus); | |
902 | int (*init_pci) (PCIBus *bus); | |
903 | } init; | |
904 | }; | |
905 | ||
906 | static struct soundhw soundhw[] = { | |
907 | #ifdef HAS_AUDIO_CHOICE | |
908 | #ifdef CONFIG_PCSPK | |
909 | { | |
910 | "pcspk", | |
911 | "PC speaker", | |
912 | 0, | |
913 | 1, | |
914 | { .init_isa = pcspk_audio_init } | |
915 | }, | |
916 | #endif | |
917 | ||
918 | #ifdef CONFIG_SB16 | |
919 | { | |
920 | "sb16", | |
921 | "Creative Sound Blaster 16", | |
922 | 0, | |
923 | 1, | |
924 | { .init_isa = SB16_init } | |
925 | }, | |
926 | #endif | |
927 | ||
928 | #ifdef CONFIG_CS4231A | |
929 | { | |
930 | "cs4231a", | |
931 | "CS4231A", | |
932 | 0, | |
933 | 1, | |
934 | { .init_isa = cs4231a_init } | |
935 | }, | |
936 | #endif | |
937 | ||
938 | #ifdef CONFIG_ADLIB | |
939 | { | |
940 | "adlib", | |
941 | #ifdef HAS_YMF262 | |
942 | "Yamaha YMF262 (OPL3)", | |
943 | #else | |
944 | "Yamaha YM3812 (OPL2)", | |
945 | #endif | |
946 | 0, | |
947 | 1, | |
948 | { .init_isa = Adlib_init } | |
949 | }, | |
950 | #endif | |
951 | ||
952 | #ifdef CONFIG_GUS | |
953 | { | |
954 | "gus", | |
955 | "Gravis Ultrasound GF1", | |
956 | 0, | |
957 | 1, | |
958 | { .init_isa = GUS_init } | |
959 | }, | |
960 | #endif | |
961 | ||
962 | #ifdef CONFIG_AC97 | |
963 | { | |
964 | "ac97", | |
965 | "Intel 82801AA AC97 Audio", | |
966 | 0, | |
967 | 0, | |
968 | { .init_pci = ac97_init } | |
969 | }, | |
970 | #endif | |
971 | ||
972 | #ifdef CONFIG_ES1370 | |
973 | { | |
974 | "es1370", | |
975 | "ENSONIQ AudioPCI ES1370", | |
976 | 0, | |
977 | 0, | |
978 | { .init_pci = es1370_init } | |
979 | }, | |
980 | #endif | |
981 | ||
982 | #ifdef CONFIG_HDA | |
983 | { | |
984 | "hda", | |
985 | "Intel HD Audio", | |
986 | 0, | |
987 | 0, | |
988 | { .init_pci = intel_hda_and_codec_init } | |
989 | }, | |
990 | #endif | |
991 | ||
992 | #endif /* HAS_AUDIO_CHOICE */ | |
993 | ||
994 | { NULL, NULL, 0, 0, { NULL } } | |
995 | }; | |
996 | ||
997 | void select_soundhw(const char *optarg) | |
998 | { | |
999 | struct soundhw *c; | |
1000 | ||
1001 | if (is_help_option(optarg)) { | |
1002 | show_valid_cards: | |
1003 | ||
1004 | #ifdef HAS_AUDIO_CHOICE | |
1005 | printf("Valid sound card names (comma separated):\n"); | |
1006 | for (c = soundhw; c->name; ++c) { | |
1007 | printf ("%-11s %s\n", c->name, c->descr); | |
1008 | } | |
1009 | printf("\n-soundhw all will enable all of the above\n"); | |
1010 | #else | |
1011 | printf("Machine has no user-selectable audio hardware " | |
1012 | "(it may or may not have always-present audio hardware).\n"); | |
1013 | #endif | |
1014 | exit(!is_help_option(optarg)); | |
1015 | } | |
1016 | else { | |
1017 | size_t l; | |
1018 | const char *p; | |
1019 | char *e; | |
1020 | int bad_card = 0; | |
1021 | ||
1022 | if (!strcmp(optarg, "all")) { | |
1023 | for (c = soundhw; c->name; ++c) { | |
1024 | c->enabled = 1; | |
1025 | } | |
1026 | return; | |
1027 | } | |
1028 | ||
1029 | p = optarg; | |
1030 | while (*p) { | |
1031 | e = strchr(p, ','); | |
1032 | l = !e ? strlen(p) : (size_t) (e - p); | |
1033 | ||
1034 | for (c = soundhw; c->name; ++c) { | |
1035 | if (!strncmp(c->name, p, l) && !c->name[l]) { | |
1036 | c->enabled = 1; | |
1037 | break; | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | if (!c->name) { | |
1042 | if (l > 80) { | |
1043 | fprintf(stderr, | |
1044 | "Unknown sound card name (too big to show)\n"); | |
1045 | } | |
1046 | else { | |
1047 | fprintf(stderr, "Unknown sound card name `%.*s'\n", | |
1048 | (int) l, p); | |
1049 | } | |
1050 | bad_card = 1; | |
1051 | } | |
1052 | p += l + (e != NULL); | |
1053 | } | |
1054 | ||
1055 | if (bad_card) { | |
1056 | goto show_valid_cards; | |
1057 | } | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | void audio_init(ISABus *isa_bus, PCIBus *pci_bus) | |
1062 | { | |
1063 | struct soundhw *c; | |
1064 | ||
1065 | for (c = soundhw; c->name; ++c) { | |
1066 | if (c->enabled) { | |
1067 | if (c->isa) { | |
1068 | if (isa_bus) { | |
1069 | c->init.init_isa(isa_bus); | |
1070 | } | |
1071 | } else { | |
1072 | if (pci_bus) { | |
1073 | c->init.init_pci(pci_bus); | |
1074 | } | |
1075 | } | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | #else | |
1080 | void select_soundhw(const char *optarg) | |
1081 | { | |
1082 | } | |
1083 | void audio_init(ISABus *isa_bus, PCIBus *pci_bus) | |
1084 | { | |
1085 | } | |
1086 | #endif | |
1087 | ||
1088 | int qemu_uuid_parse(const char *str, uint8_t *uuid) | |
1089 | { | |
1090 | int ret; | |
1091 | ||
1092 | if (strlen(str) != 36) { | |
1093 | return -1; | |
1094 | } | |
1095 | ||
1096 | ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], | |
1097 | &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], | |
1098 | &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], | |
1099 | &uuid[15]); | |
1100 | ||
1101 | if (ret != 16) { | |
1102 | return -1; | |
1103 | } | |
1104 | #ifdef TARGET_I386 | |
1105 | smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid); | |
1106 | #endif | |
1107 | return 0; | |
1108 | } | |
1109 | ||
1110 | void do_acpitable_option(const char *optarg) | |
1111 | { | |
1112 | #ifdef TARGET_I386 | |
1113 | if (acpi_table_add(optarg) < 0) { | |
1114 | fprintf(stderr, "Wrong acpi table provided\n"); | |
1115 | exit(1); | |
1116 | } | |
1117 | #endif | |
1118 | } | |
1119 | ||
1120 | void do_smbios_option(const char *optarg) | |
1121 | { | |
1122 | #ifdef TARGET_I386 | |
1123 | if (smbios_entry_add(optarg) < 0) { | |
1124 | fprintf(stderr, "Wrong smbios provided\n"); | |
1125 | exit(1); | |
1126 | } | |
1127 | #endif | |
1128 | } | |
1129 | ||
1130 | void cpudef_init(void) | |
1131 | { | |
1132 | #if defined(cpudef_setup) | |
1133 | cpudef_setup(); /* parse cpu definitions in target config file */ | |
1134 | #endif | |
1135 | } | |
1136 | ||
1137 | int audio_available(void) | |
1138 | { | |
1139 | #ifdef HAS_AUDIO | |
1140 | return 1; | |
1141 | #else | |
1142 | return 0; | |
1143 | #endif | |
1144 | } | |
1145 | ||
1146 | int tcg_available(void) | |
1147 | { | |
1148 | return 1; | |
1149 | } | |
1150 | ||
1151 | int kvm_available(void) | |
1152 | { | |
1153 | #ifdef CONFIG_KVM | |
1154 | return 1; | |
1155 | #else | |
1156 | return 0; | |
1157 | #endif | |
1158 | } | |
1159 | ||
1160 | int xen_available(void) | |
1161 | { | |
1162 | #ifdef CONFIG_XEN | |
1163 | return 1; | |
1164 | #else | |
1165 | return 0; | |
1166 | #endif | |
1167 | } | |
1168 | ||
1169 | ||
1170 | TargetInfo *qmp_query_target(Error **errp) | |
1171 | { | |
1172 | TargetInfo *info = g_malloc0(sizeof(*info)); | |
1173 | ||
1174 | info->arch = TARGET_TYPE; | |
1175 | ||
1176 | return info; | |
1177 | } |