arch_init.c

   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 "arch_init.h"
  35 #include "audio/audio.h"
  36 #include "hw/pc.h"
  37 #include "hw/pci.h"
  38 #include "hw/audiodev.h"
  39 #include "kvm.h"
  40 #include "migration.h"
  41 #include "net.h"
  42 #include "gdbstub.h"
  43 #include "hw/smbios.h"
  44 #include "exec-memory.h"
  45 #include "hw/pcspk.h"
  46 #include "qemu/page_cache.h"
  47 #include "qmp-commands.h"
  48 #include "trace.h"
  49
  50 #ifdef DEBUG_ARCH_INIT
  51 #define DPRINTF(fmt, ...) \
  52     do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
  53 #else
  54 #define DPRINTF(fmt, ...) \
  55     do { } while (0)
  56 #endif
  57
  58 #ifdef TARGET_SPARC
  59 int graphic_width = 1024;
  60 int graphic_height = 768;
  61 int graphic_depth = 8;
  62 #else
  63 int graphic_width = 800;
  64 int graphic_height = 600;
  65 int graphic_depth = 15;
  66 #endif
  67
  68
  69 #if defined(TARGET_ALPHA)
  70 #define QEMU_ARCH QEMU_ARCH_ALPHA
  71 #elif defined(TARGET_ARM)
  72 #define QEMU_ARCH QEMU_ARCH_ARM
  73 #elif defined(TARGET_CRIS)
  74 #define QEMU_ARCH QEMU_ARCH_CRIS
  75 #elif defined(TARGET_I386)
  76 #define QEMU_ARCH QEMU_ARCH_I386
  77 #elif defined(TARGET_M68K)
  78 #define QEMU_ARCH QEMU_ARCH_M68K
  79 #elif defined(TARGET_LM32)
  80 #define QEMU_ARCH QEMU_ARCH_LM32
  81 #elif defined(TARGET_MICROBLAZE)
  82 #define QEMU_ARCH QEMU_ARCH_MICROBLAZE
  83 #elif defined(TARGET_MIPS)
  84 #define QEMU_ARCH QEMU_ARCH_MIPS
  85 #elif defined(TARGET_OPENRISC)
  86 #define QEMU_ARCH QEMU_ARCH_OPENRISC
  87 #elif defined(TARGET_PPC)
  88 #define QEMU_ARCH QEMU_ARCH_PPC
  89 #elif defined(TARGET_S390X)
  90 #define QEMU_ARCH QEMU_ARCH_S390X
  91 #elif defined(TARGET_SH4)
  92 #define QEMU_ARCH QEMU_ARCH_SH4
  93 #elif defined(TARGET_SPARC)
  94 #define QEMU_ARCH QEMU_ARCH_SPARC
  95 #elif defined(TARGET_XTENSA)
  96 #define QEMU_ARCH QEMU_ARCH_XTENSA
  97 #elif defined(TARGET_UNICORE32)
  98 #define QEMU_ARCH QEMU_ARCH_UNICORE32
  99 #endif
 100
 101 const uint32_t arch_type = QEMU_ARCH;
 102
 103 /***********************************************************/
 104 /* ram save/restore */
 105
 106 #define RAM_SAVE_FLAG_FULL     0x01 /* Obsolete, not used anymore */
 107 #define RAM_SAVE_FLAG_COMPRESS 0x02
 108 #define RAM_SAVE_FLAG_MEM_SIZE 0x04
 109 #define RAM_SAVE_FLAG_PAGE     0x08
 110 #define RAM_SAVE_FLAG_EOS      0x10
 111 #define RAM_SAVE_FLAG_CONTINUE 0x20
 112 #define RAM_SAVE_FLAG_XBZRLE   0x40
 113
 114 #ifdef __ALTIVEC__
 115 #include <altivec.h>
 116 #define VECTYPE        vector unsigned char
 117 #define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
 118 #define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
 119 /* altivec.h may redefine the bool macro as vector type.
 120  * Reset it to POSIX semantics. */
 121 #undef bool
 122 #define bool _Bool
 123 #elif defined __SSE2__
 124 #include <emmintrin.h>
 125 #define VECTYPE        __m128i
 126 #define SPLAT(p)       _mm_set1_epi8(*(p))
 127 #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
 128 #else
 129 #define VECTYPE        unsigned long
 130 #define SPLAT(p)       (*(p) * (~0UL / 255))
 131 #define ALL_EQ(v1, v2) ((v1) == (v2))
 132 #endif
 133
 134
 135 static struct defconfig_file {
 136     const char *filename;
 137     /* Indicates it is an user config file (disabled by -no-user-config) */
 138     bool userconfig;
 139 } default_config_files[] = {
 140     { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
 141     { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
 142     { NULL }, /* end of list */
 143 };
 144
 145
 146 int qemu_read_default_config_files(bool userconfig)
 147 {
 148     int ret;
 149     struct defconfig_file *f;
 150
 151     for (f = default_config_files; f->filename; f++) {
 152         if (!userconfig && f->userconfig) {
 153             continue;
 154         }
 155         ret = qemu_read_config_file(f->filename);
 156         if (ret < 0 && ret != -ENOENT) {
 157             return ret;
 158         }
 159     }
 160
 161     return 0;
 162 }
 163
 164 static int is_dup_page(uint8_t *page)
 165 {
 166     VECTYPE *p = (VECTYPE *)page;
 167     VECTYPE val = SPLAT(page);
 168     int i;
 169
 170     for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) {
 171         if (!ALL_EQ(val, p[i])) {
 172             return 0;
 173         }
 174     }
 175
 176     return 1;
 177 }
 178
 179 /* struct contains XBZRLE cache and a static page
 180    used by the compression */
 181 static struct {
 182     /* buffer used for XBZRLE encoding */
 183     uint8_t *encoded_buf;
 184     /* buffer for storing page content */
 185     uint8_t *current_buf;
 186     /* buffer used for XBZRLE decoding */
 187     uint8_t *decoded_buf;
 188     /* Cache for XBZRLE */
 189     PageCache *cache;
 190 } XBZRLE = {
 191     .encoded_buf = NULL,
 192     .current_buf = NULL,
 193     .decoded_buf = NULL,
 194     .cache = NULL,
 195 };
 196
 197
 198 int64_t xbzrle_cache_resize(int64_t new_size)
 199 {
 200     if (XBZRLE.cache != NULL) {
 201         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 202             TARGET_PAGE_SIZE;
 203     }
 204     return pow2floor(new_size);
 205 }
 206
 207 /* accounting for migration statistics */
 208 typedef struct AccountingInfo {
 209     uint64_t dup_pages;
 210     uint64_t norm_pages;
 211     uint64_t iterations;
 212     uint64_t xbzrle_bytes;
 213     uint64_t xbzrle_pages;
 214     uint64_t xbzrle_cache_miss;
 215     uint64_t xbzrle_overflows;
 216 } AccountingInfo;
 217
 218 static AccountingInfo acct_info;
 219
 220 static void acct_clear(void)
 221 {
 222     memset(&acct_info, 0, sizeof(acct_info));
 223 }
 224
 225 uint64_t dup_mig_bytes_transferred(void)
 226 {
 227     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 228 }
 229
 230 uint64_t dup_mig_pages_transferred(void)
 231 {
 232     return acct_info.dup_pages;
 233 }
 234
 235 uint64_t norm_mig_bytes_transferred(void)
 236 {
 237     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 238 }
 239
 240 uint64_t norm_mig_pages_transferred(void)
 241 {
 242     return acct_info.norm_pages;
 243 }
 244
 245 uint64_t xbzrle_mig_bytes_transferred(void)
 246 {
 247     return acct_info.xbzrle_bytes;
 248 }
 249
 250 uint64_t xbzrle_mig_pages_transferred(void)
 251 {
 252     return acct_info.xbzrle_pages;
 253 }
 254
 255 uint64_t xbzrle_mig_pages_cache_miss(void)
 256 {
 257     return acct_info.xbzrle_cache_miss;
 258 }
 259
 260 uint64_t xbzrle_mig_pages_overflow(void)
 261 {
 262     return acct_info.xbzrle_overflows;
 263 }
 264
 265 static void save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 266         int cont, int flag)
 267 {
 268         qemu_put_be64(f, offset | cont | flag);
 269         if (!cont) {
 270                 qemu_put_byte(f, strlen(block->idstr));
 271                 qemu_put_buffer(f, (uint8_t *)block->idstr,
 272                                 strlen(block->idstr));
 273         }
 274
 275 }
 276
 277 #define ENCODING_FLAG_XBZRLE 0x1
 278
 279 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 280                             ram_addr_t current_addr, RAMBlock *block,
 281                             ram_addr_t offset, int cont, bool last_stage)
 282 {
 283     int encoded_len = 0, bytes_sent = -1;
 284     uint8_t *prev_cached_page;
 285
 286     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 287         if (!last_stage) {
 288             cache_insert(XBZRLE.cache, current_addr,
 289                          g_memdup(current_data, TARGET_PAGE_SIZE));
 290         }
 291         acct_info.xbzrle_cache_miss++;
 292         return -1;
 293     }
 294
 295     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 296
 297     /* save current buffer into memory */
 298     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 299
 300     /* XBZRLE encoding (if there is no overflow) */
 301     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 302                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 303                                        TARGET_PAGE_SIZE);
 304     if (encoded_len == 0) {
 305         DPRINTF("Skipping unmodified page\n");
 306         return 0;
 307     } else if (encoded_len == -1) {
 308         DPRINTF("Overflow\n");
 309         acct_info.xbzrle_overflows++;
 310         /* update data in the cache */
 311         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 312         return -1;
 313     }
 314
 315     /* we need to update the data in the cache, in order to get the same data */
 316     if (!last_stage) {
 317         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 318     }
 319
 320     /* Send XBZRLE based compressed page */
 321     save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 322     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 323     qemu_put_be16(f, encoded_len);
 324     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 325     bytes_sent = encoded_len + 1 + 2;
 326     acct_info.xbzrle_pages++;
 327     acct_info.xbzrle_bytes += bytes_sent;
 328
 329     return bytes_sent;
 330 }
 331
 332 static RAMBlock *last_block;
 333 static ram_addr_t last_offset;
 334
 335 static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr,
 336                                                          ram_addr_t offset)
 337 {
 338     bool ret = memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
 339                                        DIRTY_MEMORY_MIGRATION);
 340
 341     if (ret) {
 342         memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
 343                                   DIRTY_MEMORY_MIGRATION);
 344     }
 345     return ret;
 346 }
 347
 348 static inline void migration_bitmap_set_dirty(MemoryRegion *mr, int length)
 349 {
 350     ram_addr_t addr;
 351
 352     for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
 353         if (!memory_region_get_dirty(mr, addr, TARGET_PAGE_SIZE,
 354                                      DIRTY_MEMORY_MIGRATION)) {
 355             memory_region_set_dirty(mr, addr, TARGET_PAGE_SIZE);
 356         }
 357     }
 358 }
 359
 360 static void migration_bitmap_sync(void)
 361 {
 362     uint64_t num_dirty_pages_init = ram_list.dirty_pages;
 363
 364     trace_migration_bitmap_sync_start();
 365     memory_global_sync_dirty_bitmap(get_system_memory());
 366     trace_migration_bitmap_sync_end(ram_list.dirty_pages
 367                                     - num_dirty_pages_init);
 368 }
 369
 370
 371 /*
 372  * ram_save_block: Writes a page of memory to the stream f
 373  *
 374  * Returns:  0: if the page hasn't changed
 375  *          -1: if there are no more dirty pages
 376  *           n: the amount of bytes written in other case
 377  */
 378
 379 static int ram_save_block(QEMUFile *f, bool last_stage)
 380 {
 381     RAMBlock *block = last_block;
 382     ram_addr_t offset = last_offset;
 383     int bytes_sent = -1;
 384     MemoryRegion *mr;
 385     ram_addr_t current_addr;
 386
 387     if (!block)
 388         block = QLIST_FIRST(&ram_list.blocks);
 389
 390     do {
 391         mr = block->mr;
 392         if (migration_bitmap_test_and_reset_dirty(mr, offset)) {
 393             uint8_t *p;
 394             int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
 395
 396             p = memory_region_get_ram_ptr(mr) + offset;
 397
 398             if (is_dup_page(p)) {
 399                 acct_info.dup_pages++;
 400                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_COMPRESS);
 401                 qemu_put_byte(f, *p);
 402                 bytes_sent = 1;
 403             } else if (migrate_use_xbzrle()) {
 404                 current_addr = block->offset + offset;
 405                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 406                                               offset, cont, last_stage);
 407                 if (!last_stage) {
 408                     p = get_cached_data(XBZRLE.cache, current_addr);
 409                 }
 410             }
 411
 412             /* either we didn't send yet (we may have had XBZRLE overflow) */
 413             if (bytes_sent == -1) {
 414                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 415                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 416                 bytes_sent = TARGET_PAGE_SIZE;
 417                 acct_info.norm_pages++;
 418             }
 419
 420             /* if page is unmodified, continue to the next */
 421             if (bytes_sent != 0) {
 422                 break;
 423             }
 424         }
 425
 426         offset += TARGET_PAGE_SIZE;
 427         if (offset >= block->length) {
 428             offset = 0;
 429             block = QLIST_NEXT(block, next);
 430             if (!block)
 431                 block = QLIST_FIRST(&ram_list.blocks);
 432         }
 433     } while (block != last_block || offset != last_offset);
 434
 435     last_block = block;
 436     last_offset = offset;
 437
 438     return bytes_sent;
 439 }
 440
 441 static uint64_t bytes_transferred;
 442
 443 static ram_addr_t ram_save_remaining(void)
 444 {
 445     return ram_list.dirty_pages;
 446 }
 447
 448 uint64_t ram_bytes_remaining(void)
 449 {
 450     return ram_save_remaining() * TARGET_PAGE_SIZE;
 451 }
 452
 453 uint64_t ram_bytes_transferred(void)
 454 {
 455     return bytes_transferred;
 456 }
 457
 458 uint64_t ram_bytes_total(void)
 459 {
 460     RAMBlock *block;
 461     uint64_t total = 0;
 462
 463     QLIST_FOREACH(block, &ram_list.blocks, next)
 464         total += block->length;
 465
 466     return total;
 467 }
 468
 469 static int block_compar(const void *a, const void *b)
 470 {
 471     RAMBlock * const *ablock = a;
 472     RAMBlock * const *bblock = b;
 473
 474     return strcmp((*ablock)->idstr, (*bblock)->idstr);
 475 }
 476
 477 static void sort_ram_list(void)
 478 {
 479     RAMBlock *block, *nblock, **blocks;
 480     int n;
 481     n = 0;
 482     QLIST_FOREACH(block, &ram_list.blocks, next) {
 483         ++n;
 484     }
 485     blocks = g_malloc(n * sizeof *blocks);
 486     n = 0;
 487     QLIST_FOREACH_SAFE(block, &ram_list.blocks, next, nblock) {
 488         blocks[n++] = block;
 489         QLIST_REMOVE(block, next);
 490     }
 491     qsort(blocks, n, sizeof *blocks, block_compar);
 492     while (--n >= 0) {
 493         QLIST_INSERT_HEAD(&ram_list.blocks, blocks[n], next);
 494     }
 495     g_free(blocks);
 496 }
 497
 498 static void migration_end(void)
 499 {
 500     memory_global_dirty_log_stop();
 501
 502     if (migrate_use_xbzrle()) {
 503         cache_fini(XBZRLE.cache);
 504         g_free(XBZRLE.cache);
 505         g_free(XBZRLE.encoded_buf);
 506         g_free(XBZRLE.current_buf);
 507         g_free(XBZRLE.decoded_buf);
 508         XBZRLE.cache = NULL;
 509     }
 510 }
 511
 512 static void ram_migration_cancel(void *opaque)
 513 {
 514     migration_end();
 515 }
 516
 517
 518 static void reset_ram_globals(void)
 519 {
 520     last_block = NULL;
 521     last_offset = 0;
 522     sort_ram_list();
 523 }
 524
 525 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 526
 527 static int ram_save_setup(QEMUFile *f, void *opaque)
 528 {
 529     RAMBlock *block;
 530
 531     bytes_transferred = 0;
 532     reset_ram_globals();
 533
 534     if (migrate_use_xbzrle()) {
 535         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 536                                   TARGET_PAGE_SIZE,
 537                                   TARGET_PAGE_SIZE);
 538         if (!XBZRLE.cache) {
 539             DPRINTF("Error creating cache\n");
 540             return -1;
 541         }
 542         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 543         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 544         acct_clear();
 545     }
 546
 547     /* Make sure all dirty bits are set */
 548     QLIST_FOREACH(block, &ram_list.blocks, next) {
 549         migration_bitmap_set_dirty(block->mr, block->length);
 550     }
 551
 552     memory_global_dirty_log_start();
 553     memory_global_sync_dirty_bitmap(get_system_memory());
 554
 555     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 556
 557     QLIST_FOREACH(block, &ram_list.blocks, next) {
 558         qemu_put_byte(f, strlen(block->idstr));
 559         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 560         qemu_put_be64(f, block->length);
 561     }
 562
 563     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 564
 565     return 0;
 566 }
 567
 568 static int ram_save_iterate(QEMUFile *f, void *opaque)
 569 {
 570     uint64_t bytes_transferred_last;
 571     double bwidth = 0;
 572     int ret;
 573     int i;
 574     uint64_t expected_downtime;
 575     MigrationState *s = migrate_get_current();
 576
 577     bytes_transferred_last = bytes_transferred;
 578     bwidth = qemu_get_clock_ns(rt_clock);
 579
 580     i = 0;
 581     while ((ret = qemu_file_rate_limit(f)) == 0) {
 582         int bytes_sent;
 583
 584         bytes_sent = ram_save_block(f, false);
 585         /* no more blocks to sent */
 586         if (bytes_sent < 0) {
 587             break;
 588         }
 589         bytes_transferred += bytes_sent;
 590         acct_info.iterations++;
 591         /* we want to check in the 1st loop, just in case it was the 1st time
 592            and we had to sync the dirty bitmap.
 593            qemu_get_clock_ns() is a bit expensive, so we only check each some
 594            iterations
 595         */
 596         if ((i & 63) == 0) {
 597             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - bwidth) / 1000000;
 598             if (t1 > MAX_WAIT) {
 599                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 600                         t1, i);
 601                 break;
 602             }
 603         }
 604         i++;
 605     }
 606
 607     if (ret < 0) {
 608         return ret;
 609     }
 610
 611     bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
 612     bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
 613
 614     /* if we haven't transferred anything this round, force
 615      * expected_downtime to a very high value, but without
 616      * crashing */
 617     if (bwidth == 0) {
 618         bwidth = 0.000001;
 619     }
 620
 621     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 622
 623     expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 624     DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(" PRIu64 ")?\n",
 625             expected_downtime, migrate_max_downtime());
 626
 627     if (expected_downtime <= migrate_max_downtime()) {
 628         migration_bitmap_sync();
 629         expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 630         s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */
 631
 632         return expected_downtime <= migrate_max_downtime();
 633     }
 634     return 0;
 635 }
 636
 637 static int ram_save_complete(QEMUFile *f, void *opaque)
 638 {
 639     migration_bitmap_sync();
 640
 641     /* try transferring iterative blocks of memory */
 642
 643     /* flush all remaining blocks regardless of rate limiting */
 644     while (true) {
 645         int bytes_sent;
 646
 647         bytes_sent = ram_save_block(f, true);
 648         /* no more blocks to sent */
 649         if (bytes_sent < 0) {
 650             break;
 651         }
 652         bytes_transferred += bytes_sent;
 653     }
 654     memory_global_dirty_log_stop();
 655
 656     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 657
 658     return 0;
 659 }
 660
 661 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 662 {
 663     int ret, rc = 0;
 664     unsigned int xh_len;
 665     int xh_flags;
 666
 667     if (!XBZRLE.decoded_buf) {
 668         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 669     }
 670
 671     /* extract RLE header */
 672     xh_flags = qemu_get_byte(f);
 673     xh_len = qemu_get_be16(f);
 674
 675     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 676         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 677         return -1;
 678     }
 679
 680     if (xh_len > TARGET_PAGE_SIZE) {
 681         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 682         return -1;
 683     }
 684     /* load data and decode */
 685     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 686
 687     /* decode RLE */
 688     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 689                                TARGET_PAGE_SIZE);
 690     if (ret == -1) {
 691         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 692         rc = -1;
 693     } else  if (ret > TARGET_PAGE_SIZE) {
 694         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 695                 ret, TARGET_PAGE_SIZE);
 696         abort();
 697     }
 698
 699     return rc;
 700 }
 701
 702 static inline void *host_from_stream_offset(QEMUFile *f,
 703                                             ram_addr_t offset,
 704                                             int flags)
 705 {
 706     static RAMBlock *block = NULL;
 707     char id[256];
 708     uint8_t len;
 709
 710     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 711         if (!block) {
 712             fprintf(stderr, "Ack, bad migration stream!\n");
 713             return NULL;
 714         }
 715
 716         return memory_region_get_ram_ptr(block->mr) + offset;
 717     }
 718
 719     len = qemu_get_byte(f);
 720     qemu_get_buffer(f, (uint8_t *)id, len);
 721     id[len] = 0;
 722
 723     QLIST_FOREACH(block, &ram_list.blocks, next) {
 724         if (!strncmp(id, block->idstr, sizeof(id)))
 725             return memory_region_get_ram_ptr(block->mr) + offset;
 726     }
 727
 728     fprintf(stderr, "Can't find block %s!\n", id);
 729     return NULL;
 730 }
 731
 732 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 733 {
 734     ram_addr_t addr;
 735     int flags, ret = 0;
 736     int error;
 737     static uint64_t seq_iter;
 738
 739     seq_iter++;
 740
 741     if (version_id < 4 || version_id > 4) {
 742         return -EINVAL;
 743     }
 744
 745     do {
 746         addr = qemu_get_be64(f);
 747
 748         flags = addr & ~TARGET_PAGE_MASK;
 749         addr &= TARGET_PAGE_MASK;
 750
 751         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 752             if (version_id == 4) {
 753                 /* Synchronize RAM block list */
 754                 char id[256];
 755                 ram_addr_t length;
 756                 ram_addr_t total_ram_bytes = addr;
 757
 758                 while (total_ram_bytes) {
 759                     RAMBlock *block;
 760                     uint8_t len;
 761
 762                     len = qemu_get_byte(f);
 763                     qemu_get_buffer(f, (uint8_t *)id, len);
 764                     id[len] = 0;
 765                     length = qemu_get_be64(f);
 766
 767                     QLIST_FOREACH(block, &ram_list.blocks, next) {
 768                         if (!strncmp(id, block->idstr, sizeof(id))) {
 769                             if (block->length != length) {
 770                                 ret =  -EINVAL;
 771                                 goto done;
 772                             }
 773                             break;
 774                         }
 775                     }
 776
 777                     if (!block) {
 778                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 779                                 "accept migration\n", id);
 780                         ret = -EINVAL;
 781                         goto done;
 782                     }
 783
 784                     total_ram_bytes -= length;
 785                 }
 786             }
 787         }
 788
 789         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 790             void *host;
 791             uint8_t ch;
 792
 793             host = host_from_stream_offset(f, addr, flags);
 794             if (!host) {
 795                 return -EINVAL;
 796             }
 797
 798             ch = qemu_get_byte(f);
 799             memset(host, ch, TARGET_PAGE_SIZE);
 800 #ifndef _WIN32
 801             if (ch == 0 &&
 802                 (!kvm_enabled() || kvm_has_sync_mmu())) {
 803                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 804             }
 805 #endif
 806         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 807             void *host;
 808
 809             host = host_from_stream_offset(f, addr, flags);
 810             if (!host) {
 811                 return -EINVAL;
 812             }
 813
 814             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 815         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 816             if (!migrate_use_xbzrle()) {
 817                 return -EINVAL;
 818             }
 819             void *host = host_from_stream_offset(f, addr, flags);
 820             if (!host) {
 821                 return -EINVAL;
 822             }
 823
 824             if (load_xbzrle(f, addr, host) < 0) {
 825                 ret = -EINVAL;
 826                 goto done;
 827             }
 828         }
 829         error = qemu_file_get_error(f);
 830         if (error) {
 831             ret = error;
 832             goto done;
 833         }
 834     } while (!(flags & RAM_SAVE_FLAG_EOS));
 835
 836 done:
 837     DPRINTF("Completed load of VM with exit code %d seq iteration "
 838             "%" PRIu64 "\n", ret, seq_iter);
 839     return ret;
 840 }
 841
 842 SaveVMHandlers savevm_ram_handlers = {
 843     .save_live_setup = ram_save_setup,
 844     .save_live_iterate = ram_save_iterate,
 845     .save_live_complete = ram_save_complete,
 846     .load_state = ram_load,
 847     .cancel = ram_migration_cancel,
 848 };
 849
 850 #ifdef HAS_AUDIO
 851 struct soundhw {
 852     const char *name;
 853     const char *descr;
 854     int enabled;
 855     int isa;
 856     union {
 857         int (*init_isa) (ISABus *bus);
 858         int (*init_pci) (PCIBus *bus);
 859     } init;
 860 };
 861
 862 static struct soundhw soundhw[] = {
 863 #ifdef HAS_AUDIO_CHOICE
 864 #ifdef CONFIG_PCSPK
 865     {
 866         "pcspk",
 867         "PC speaker",
 868         0,
 869         1,
 870         { .init_isa = pcspk_audio_init }
 871     },
 872 #endif
 873
 874 #ifdef CONFIG_SB16
 875     {
 876         "sb16",
 877         "Creative Sound Blaster 16",
 878         0,
 879         1,
 880         { .init_isa = SB16_init }
 881     },
 882 #endif
 883
 884 #ifdef CONFIG_CS4231A
 885     {
 886         "cs4231a",
 887         "CS4231A",
 888         0,
 889         1,
 890         { .init_isa = cs4231a_init }
 891     },
 892 #endif
 893
 894 #ifdef CONFIG_ADLIB
 895     {
 896         "adlib",
 897 #ifdef HAS_YMF262
 898         "Yamaha YMF262 (OPL3)",
 899 #else
 900         "Yamaha YM3812 (OPL2)",
 901 #endif
 902         0,
 903         1,
 904         { .init_isa = Adlib_init }
 905     },
 906 #endif
 907
 908 #ifdef CONFIG_GUS
 909     {
 910         "gus",
 911         "Gravis Ultrasound GF1",
 912         0,
 913         1,
 914         { .init_isa = GUS_init }
 915     },
 916 #endif
 917
 918 #ifdef CONFIG_AC97
 919     {
 920         "ac97",
 921         "Intel 82801AA AC97 Audio",
 922         0,
 923         0,
 924         { .init_pci = ac97_init }
 925     },
 926 #endif
 927
 928 #ifdef CONFIG_ES1370
 929     {
 930         "es1370",
 931         "ENSONIQ AudioPCI ES1370",
 932         0,
 933         0,
 934         { .init_pci = es1370_init }
 935     },
 936 #endif
 937
 938 #ifdef CONFIG_HDA
 939     {
 940         "hda",
 941         "Intel HD Audio",
 942         0,
 943         0,
 944         { .init_pci = intel_hda_and_codec_init }
 945     },
 946 #endif
 947
 948 #endif /* HAS_AUDIO_CHOICE */
 949
 950     { NULL, NULL, 0, 0, { NULL } }
 951 };
 952
 953 void select_soundhw(const char *optarg)
 954 {
 955     struct soundhw *c;
 956
 957     if (is_help_option(optarg)) {
 958     show_valid_cards:
 959
 960 #ifdef HAS_AUDIO_CHOICE
 961         printf("Valid sound card names (comma separated):\n");
 962         for (c = soundhw; c->name; ++c) {
 963             printf ("%-11s %s\n", c->name, c->descr);
 964         }
 965         printf("\n-soundhw all will enable all of the above\n");
 966 #else
 967         printf("Machine has no user-selectable audio hardware "
 968                "(it may or may not have always-present audio hardware).\n");
 969 #endif
 970         exit(!is_help_option(optarg));
 971     }
 972     else {
 973         size_t l;
 974         const char *p;
 975         char *e;
 976         int bad_card = 0;
 977
 978         if (!strcmp(optarg, "all")) {
 979             for (c = soundhw; c->name; ++c) {
 980                 c->enabled = 1;
 981             }
 982             return;
 983         }
 984
 985         p = optarg;
 986         while (*p) {
 987             e = strchr(p, ',');
 988             l = !e ? strlen(p) : (size_t) (e - p);
 989
 990             for (c = soundhw; c->name; ++c) {
 991                 if (!strncmp(c->name, p, l) && !c->name[l]) {
 992                     c->enabled = 1;
 993                     break;
 994                 }
 995             }
 996
 997             if (!c->name) {
 998                 if (l > 80) {
 999                     fprintf(stderr,
1000                             "Unknown sound card name (too big to show)\n");
1001                 }
1002                 else {
1003                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1004                             (int) l, p);
1005                 }
1006                 bad_card = 1;
1007             }
1008             p += l + (e != NULL);
1009         }
1010
1011         if (bad_card) {
1012             goto show_valid_cards;
1013         }
1014     }
1015 }
1016
1017 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1018 {
1019     struct soundhw *c;
1020
1021     for (c = soundhw; c->name; ++c) {
1022         if (c->enabled) {
1023             if (c->isa) {
1024                 if (isa_bus) {
1025                     c->init.init_isa(isa_bus);
1026                 }
1027             } else {
1028                 if (pci_bus) {
1029                     c->init.init_pci(pci_bus);
1030                 }
1031             }
1032         }
1033     }
1034 }
1035 #else
1036 void select_soundhw(const char *optarg)
1037 {
1038 }
1039 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1040 {
1041 }
1042 #endif
1043
1044 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1045 {
1046     int ret;
1047
1048     if (strlen(str) != 36) {
1049         return -1;
1050     }
1051
1052     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1053                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1054                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1055                  &uuid[15]);
1056
1057     if (ret != 16) {
1058         return -1;
1059     }
1060 #ifdef TARGET_I386
1061     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1062 #endif
1063     return 0;
1064 }
1065
1066 void do_acpitable_option(const char *optarg)
1067 {
1068 #ifdef TARGET_I386
1069     if (acpi_table_add(optarg) < 0) {
1070         fprintf(stderr, "Wrong acpi table provided\n");
1071         exit(1);
1072     }
1073 #endif
1074 }
1075
1076 void do_smbios_option(const char *optarg)
1077 {
1078 #ifdef TARGET_I386
1079     if (smbios_entry_add(optarg) < 0) {
1080         fprintf(stderr, "Wrong smbios provided\n");
1081         exit(1);
1082     }
1083 #endif
1084 }
1085
1086 void cpudef_init(void)
1087 {
1088 #if defined(cpudef_setup)
1089     cpudef_setup(); /* parse cpu definitions in target config file */
1090 #endif
1091 }
1092
1093 int audio_available(void)
1094 {
1095 #ifdef HAS_AUDIO
1096     return 1;
1097 #else
1098     return 0;
1099 #endif
1100 }
1101
1102 int tcg_available(void)
1103 {
1104     return 1;
1105 }
1106
1107 int kvm_available(void)
1108 {
1109 #ifdef CONFIG_KVM
1110     return 1;
1111 #else
1112     return 0;
1113 #endif
1114 }
1115
1116 int xen_available(void)
1117 {
1118 #ifdef CONFIG_XEN
1119     return 1;
1120 #else
1121     return 0;
1122 #endif
1123 }
1124
1125
1126 TargetInfo *qmp_query_target(Error **errp)
1127 {
1128     TargetInfo *info = g_malloc0(sizeof(*info));
1129
1130     info->arch = TARGET_TYPE;
1131
1132     return info;
1133 }