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 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, 0, 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 getpagesize() <= TARGET_PAGE_SIZE) { 845 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED); 846 } 847 #endif 848 } else if (flags & RAM_SAVE_FLAG_PAGE) { 849 void *host; 850 851 host = host_from_stream_offset(f, addr, flags); 852 if (!host) { 853 return -EINVAL; 854 } 855 856 qemu_get_buffer(f, host, TARGET_PAGE_SIZE); 857 } else if (flags & RAM_SAVE_FLAG_XBZRLE) { 858 if (!migrate_use_xbzrle()) { 859 return -EINVAL; 860 } 861 void *host = host_from_stream_offset(f, addr, flags); 862 if (!host) { 863 return -EINVAL; 864 } 865 866 if (load_xbzrle(f, addr, host) < 0) { 867 ret = -EINVAL; 868 goto done; 869 } 870 } 871 error = qemu_file_get_error(f); 872 if (error) { 873 ret = error; 874 goto done; 875 } 876 } while (!(flags & RAM_SAVE_FLAG_EOS)); 877 878 done: 879 DPRINTF("Completed load of VM with exit code %d seq iteration " 880 "%" PRIu64 "\n", ret, seq_iter); 881 return ret; 882 } 883 884 SaveVMHandlers savevm_ram_handlers = { 885 .save_live_setup = ram_save_setup, 886 .save_live_iterate = ram_save_iterate, 887 .save_live_complete = ram_save_complete, 888 .load_state = ram_load, 889 .cancel = ram_migration_cancel, 890 }; 891 892 #ifdef HAS_AUDIO 893 struct soundhw { 894 const char *name; 895 const char *descr; 896 int enabled; 897 int isa; 898 union { 899 int (*init_isa) (ISABus *bus); 900 int (*init_pci) (PCIBus *bus); 901 } init; 902 }; 903 904 static struct soundhw soundhw[] = { 905 #ifdef HAS_AUDIO_CHOICE 906 #ifdef CONFIG_PCSPK 907 { 908 "pcspk", 909 "PC speaker", 910 0, 911 1, 912 { .init_isa = pcspk_audio_init } 913 }, 914 #endif 915 916 #ifdef CONFIG_SB16 917 { 918 "sb16", 919 "Creative Sound Blaster 16", 920 0, 921 1, 922 { .init_isa = SB16_init } 923 }, 924 #endif 925 926 #ifdef CONFIG_CS4231A 927 { 928 "cs4231a", 929 "CS4231A", 930 0, 931 1, 932 { .init_isa = cs4231a_init } 933 }, 934 #endif 935 936 #ifdef CONFIG_ADLIB 937 { 938 "adlib", 939 #ifdef HAS_YMF262 940 "Yamaha YMF262 (OPL3)", 941 #else 942 "Yamaha YM3812 (OPL2)", 943 #endif 944 0, 945 1, 946 { .init_isa = Adlib_init } 947 }, 948 #endif 949 950 #ifdef CONFIG_GUS 951 { 952 "gus", 953 "Gravis Ultrasound GF1", 954 0, 955 1, 956 { .init_isa = GUS_init } 957 }, 958 #endif 959 960 #ifdef CONFIG_AC97 961 { 962 "ac97", 963 "Intel 82801AA AC97 Audio", 964 0, 965 0, 966 { .init_pci = ac97_init } 967 }, 968 #endif 969 970 #ifdef CONFIG_ES1370 971 { 972 "es1370", 973 "ENSONIQ AudioPCI ES1370", 974 0, 975 0, 976 { .init_pci = es1370_init } 977 }, 978 #endif 979 980 #ifdef CONFIG_HDA 981 { 982 "hda", 983 "Intel HD Audio", 984 0, 985 0, 986 { .init_pci = intel_hda_and_codec_init } 987 }, 988 #endif 989 990 #endif /* HAS_AUDIO_CHOICE */ 991 992 { NULL, NULL, 0, 0, { NULL } } 993 }; 994 995 void select_soundhw(const char *optarg) 996 { 997 struct soundhw *c; 998 999 if (is_help_option(optarg)) { 1000 show_valid_cards: 1001 1002 #ifdef HAS_AUDIO_CHOICE 1003 printf("Valid sound card names (comma separated):\n"); 1004 for (c = soundhw; c->name; ++c) { 1005 printf ("%-11s %s\n", c->name, c->descr); 1006 } 1007 printf("\n-soundhw all will enable all of the above\n"); 1008 #else 1009 printf("Machine has no user-selectable audio hardware " 1010 "(it may or may not have always-present audio hardware).\n"); 1011 #endif 1012 exit(!is_help_option(optarg)); 1013 } 1014 else { 1015 size_t l; 1016 const char *p; 1017 char *e; 1018 int bad_card = 0; 1019 1020 if (!strcmp(optarg, "all")) { 1021 for (c = soundhw; c->name; ++c) { 1022 c->enabled = 1; 1023 } 1024 return; 1025 } 1026 1027 p = optarg; 1028 while (*p) { 1029 e = strchr(p, ','); 1030 l = !e ? strlen(p) : (size_t) (e - p); 1031 1032 for (c = soundhw; c->name; ++c) { 1033 if (!strncmp(c->name, p, l) && !c->name[l]) { 1034 c->enabled = 1; 1035 break; 1036 } 1037 } 1038 1039 if (!c->name) { 1040 if (l > 80) { 1041 fprintf(stderr, 1042 "Unknown sound card name (too big to show)\n"); 1043 } 1044 else { 1045 fprintf(stderr, "Unknown sound card name `%.*s'\n", 1046 (int) l, p); 1047 } 1048 bad_card = 1; 1049 } 1050 p += l + (e != NULL); 1051 } 1052 1053 if (bad_card) { 1054 goto show_valid_cards; 1055 } 1056 } 1057 } 1058 1059 void audio_init(ISABus *isa_bus, PCIBus *pci_bus) 1060 { 1061 struct soundhw *c; 1062 1063 for (c = soundhw; c->name; ++c) { 1064 if (c->enabled) { 1065 if (c->isa) { 1066 if (isa_bus) { 1067 c->init.init_isa(isa_bus); 1068 } 1069 } else { 1070 if (pci_bus) { 1071 c->init.init_pci(pci_bus); 1072 } 1073 } 1074 } 1075 } 1076 } 1077 #else 1078 void select_soundhw(const char *optarg) 1079 { 1080 } 1081 void audio_init(ISABus *isa_bus, PCIBus *pci_bus) 1082 { 1083 } 1084 #endif 1085 1086 int qemu_uuid_parse(const char *str, uint8_t *uuid) 1087 { 1088 int ret; 1089 1090 if (strlen(str) != 36) { 1091 return -1; 1092 } 1093 1094 ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], 1095 &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], 1096 &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], 1097 &uuid[15]); 1098 1099 if (ret != 16) { 1100 return -1; 1101 } 1102 #ifdef TARGET_I386 1103 smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid); 1104 #endif 1105 return 0; 1106 } 1107 1108 void do_acpitable_option(const char *optarg) 1109 { 1110 #ifdef TARGET_I386 1111 if (acpi_table_add(optarg) < 0) { 1112 fprintf(stderr, "Wrong acpi table provided\n"); 1113 exit(1); 1114 } 1115 #endif 1116 } 1117 1118 void do_smbios_option(const char *optarg) 1119 { 1120 #ifdef TARGET_I386 1121 if (smbios_entry_add(optarg) < 0) { 1122 fprintf(stderr, "Wrong smbios provided\n"); 1123 exit(1); 1124 } 1125 #endif 1126 } 1127 1128 void cpudef_init(void) 1129 { 1130 #if defined(cpudef_setup) 1131 cpudef_setup(); /* parse cpu definitions in target config file */ 1132 #endif 1133 } 1134 1135 int audio_available(void) 1136 { 1137 #ifdef HAS_AUDIO 1138 return 1; 1139 #else 1140 return 0; 1141 #endif 1142 } 1143 1144 int tcg_available(void) 1145 { 1146 return 1; 1147 } 1148 1149 int kvm_available(void) 1150 { 1151 #ifdef CONFIG_KVM 1152 return 1; 1153 #else 1154 return 0; 1155 #endif 1156 } 1157 1158 int xen_available(void) 1159 { 1160 #ifdef CONFIG_XEN 1161 return 1; 1162 #else 1163 return 0; 1164 #endif 1165 } 1166 1167 1168 TargetInfo *qmp_query_target(Error **errp) 1169 { 1170 TargetInfo *info = g_malloc0(sizeof(*info)); 1171 1172 info->arch = TARGET_TYPE; 1173 1174 return info; 1175 } 1176