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/monitor.h"
  33 #include "sysemu/sysemu.h"
  34 #include "qemu/bitops.h"
  35 #include "qemu/bitmap.h"
  36 #include "sysemu/arch_init.h"
  37 #include "audio/audio.h"
  38 #include "hw/i386/pc.h"
  39 #include "hw/pci/pci.h"
  40 #include "hw/audio/audio.h"
  41 #include "sysemu/kvm.h"
  42 #include "migration/migration.h"
  43 #include "exec/gdbstub.h"
  44 #include "hw/i386/smbios.h"
  45 #include "exec/address-spaces.h"
  46 #include "hw/audio/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 #include "hw/acpi/acpi.h"
  53
  54 #ifdef DEBUG_ARCH_INIT
  55 #define DPRINTF(fmt, ...) \
  56     do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
  57 #else
  58 #define DPRINTF(fmt, ...) \
  59     do { } while (0)
  60 #endif
  61
  62 #ifdef TARGET_SPARC
  63 int graphic_width = 1024;
  64 int graphic_height = 768;
  65 int graphic_depth = 8;
  66 #else
  67 int graphic_width = 800;
  68 int graphic_height = 600;
  69 int graphic_depth = 15;
  70 #endif
  71
  72
  73 #if defined(TARGET_ALPHA)
  74 #define QEMU_ARCH QEMU_ARCH_ALPHA
  75 #elif defined(TARGET_ARM)
  76 #define QEMU_ARCH QEMU_ARCH_ARM
  77 #elif defined(TARGET_CRIS)
  78 #define QEMU_ARCH QEMU_ARCH_CRIS
  79 #elif defined(TARGET_I386)
  80 #define QEMU_ARCH QEMU_ARCH_I386
  81 #elif defined(TARGET_M68K)
  82 #define QEMU_ARCH QEMU_ARCH_M68K
  83 #elif defined(TARGET_LM32)
  84 #define QEMU_ARCH QEMU_ARCH_LM32
  85 #elif defined(TARGET_MICROBLAZE)
  86 #define QEMU_ARCH QEMU_ARCH_MICROBLAZE
  87 #elif defined(TARGET_MIPS)
  88 #define QEMU_ARCH QEMU_ARCH_MIPS
  89 #elif defined(TARGET_MOXIE)
  90 #define QEMU_ARCH QEMU_ARCH_MOXIE
  91 #elif defined(TARGET_OPENRISC)
  92 #define QEMU_ARCH QEMU_ARCH_OPENRISC
  93 #elif defined(TARGET_PPC)
  94 #define QEMU_ARCH QEMU_ARCH_PPC
  95 #elif defined(TARGET_S390X)
  96 #define QEMU_ARCH QEMU_ARCH_S390X
  97 #elif defined(TARGET_SH4)
  98 #define QEMU_ARCH QEMU_ARCH_SH4
  99 #elif defined(TARGET_SPARC)
 100 #define QEMU_ARCH QEMU_ARCH_SPARC
 101 #elif defined(TARGET_XTENSA)
 102 #define QEMU_ARCH QEMU_ARCH_XTENSA
 103 #elif defined(TARGET_UNICORE32)
 104 #define QEMU_ARCH QEMU_ARCH_UNICORE32
 105 #endif
 106
 107 const uint32_t arch_type = QEMU_ARCH;
 108
 109 /***********************************************************/
 110 /* ram save/restore */
 111
 112 #define RAM_SAVE_FLAG_FULL     0x01 /* Obsolete, not used anymore */
 113 #define RAM_SAVE_FLAG_COMPRESS 0x02
 114 #define RAM_SAVE_FLAG_MEM_SIZE 0x04
 115 #define RAM_SAVE_FLAG_PAGE     0x08
 116 #define RAM_SAVE_FLAG_EOS      0x10
 117 #define RAM_SAVE_FLAG_CONTINUE 0x20
 118 #define RAM_SAVE_FLAG_XBZRLE   0x40
 119
 120
 121 static struct defconfig_file {
 122     const char *filename;
 123     /* Indicates it is an user config file (disabled by -no-user-config) */
 124     bool userconfig;
 125 } default_config_files[] = {
 126     { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
 127     { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
 128     { NULL }, /* end of list */
 129 };
 130
 131
 132 int qemu_read_default_config_files(bool userconfig)
 133 {
 134     int ret;
 135     struct defconfig_file *f;
 136
 137     for (f = default_config_files; f->filename; f++) {
 138         if (!userconfig && f->userconfig) {
 139             continue;
 140         }
 141         ret = qemu_read_config_file(f->filename);
 142         if (ret < 0 && ret != -ENOENT) {
 143             return ret;
 144         }
 145     }
 146
 147     return 0;
 148 }
 149
 150 static inline bool is_zero_page(uint8_t *p)
 151 {
 152     return buffer_find_nonzero_offset(p, TARGET_PAGE_SIZE) ==
 153         TARGET_PAGE_SIZE;
 154 }
 155
 156 /* struct contains XBZRLE cache and a static page
 157    used by the compression */
 158 static struct {
 159     /* buffer used for XBZRLE encoding */
 160     uint8_t *encoded_buf;
 161     /* buffer for storing page content */
 162     uint8_t *current_buf;
 163     /* buffer used for XBZRLE decoding */
 164     uint8_t *decoded_buf;
 165     /* Cache for XBZRLE */
 166     PageCache *cache;
 167 } XBZRLE = {
 168     .encoded_buf = NULL,
 169     .current_buf = NULL,
 170     .decoded_buf = NULL,
 171     .cache = NULL,
 172 };
 173
 174
 175 int64_t xbzrle_cache_resize(int64_t new_size)
 176 {
 177     if (XBZRLE.cache != NULL) {
 178         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 179             TARGET_PAGE_SIZE;
 180     }
 181     return pow2floor(new_size);
 182 }
 183
 184 /* accounting for migration statistics */
 185 typedef struct AccountingInfo {
 186     uint64_t dup_pages;
 187     uint64_t skipped_pages;
 188     uint64_t norm_pages;
 189     uint64_t iterations;
 190     uint64_t xbzrle_bytes;
 191     uint64_t xbzrle_pages;
 192     uint64_t xbzrle_cache_miss;
 193     uint64_t xbzrle_overflows;
 194 } AccountingInfo;
 195
 196 static AccountingInfo acct_info;
 197
 198 static void acct_clear(void)
 199 {
 200     memset(&acct_info, 0, sizeof(acct_info));
 201 }
 202
 203 uint64_t dup_mig_bytes_transferred(void)
 204 {
 205     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 206 }
 207
 208 uint64_t dup_mig_pages_transferred(void)
 209 {
 210     return acct_info.dup_pages;
 211 }
 212
 213 uint64_t skipped_mig_bytes_transferred(void)
 214 {
 215     return acct_info.skipped_pages * TARGET_PAGE_SIZE;
 216 }
 217
 218 uint64_t skipped_mig_pages_transferred(void)
 219 {
 220     return acct_info.skipped_pages;
 221 }
 222
 223 uint64_t norm_mig_bytes_transferred(void)
 224 {
 225     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 226 }
 227
 228 uint64_t norm_mig_pages_transferred(void)
 229 {
 230     return acct_info.norm_pages;
 231 }
 232
 233 uint64_t xbzrle_mig_bytes_transferred(void)
 234 {
 235     return acct_info.xbzrle_bytes;
 236 }
 237
 238 uint64_t xbzrle_mig_pages_transferred(void)
 239 {
 240     return acct_info.xbzrle_pages;
 241 }
 242
 243 uint64_t xbzrle_mig_pages_cache_miss(void)
 244 {
 245     return acct_info.xbzrle_cache_miss;
 246 }
 247
 248 uint64_t xbzrle_mig_pages_overflow(void)
 249 {
 250     return acct_info.xbzrle_overflows;
 251 }
 252
 253 static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 254                              int cont, int flag)
 255 {
 256     size_t size;
 257
 258     qemu_put_be64(f, offset | cont | flag);
 259     size = 8;
 260
 261     if (!cont) {
 262         qemu_put_byte(f, strlen(block->idstr));
 263         qemu_put_buffer(f, (uint8_t *)block->idstr,
 264                         strlen(block->idstr));
 265         size += 1 + strlen(block->idstr);
 266     }
 267     return size;
 268 }
 269
 270 #define ENCODING_FLAG_XBZRLE 0x1
 271
 272 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 273                             ram_addr_t current_addr, RAMBlock *block,
 274                             ram_addr_t offset, int cont, bool last_stage)
 275 {
 276     int encoded_len = 0, bytes_sent = -1;
 277     uint8_t *prev_cached_page;
 278
 279     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 280         if (!last_stage) {
 281             cache_insert(XBZRLE.cache, current_addr, current_data);
 282         }
 283         acct_info.xbzrle_cache_miss++;
 284         return -1;
 285     }
 286
 287     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 288
 289     /* save current buffer into memory */
 290     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 291
 292     /* XBZRLE encoding (if there is no overflow) */
 293     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 294                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 295                                        TARGET_PAGE_SIZE);
 296     if (encoded_len == 0) {
 297         DPRINTF("Skipping unmodified page\n");
 298         return 0;
 299     } else if (encoded_len == -1) {
 300         DPRINTF("Overflow\n");
 301         acct_info.xbzrle_overflows++;
 302         /* update data in the cache */
 303         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 304         return -1;
 305     }
 306
 307     /* we need to update the data in the cache, in order to get the same data */
 308     if (!last_stage) {
 309         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 310     }
 311
 312     /* Send XBZRLE based compressed page */
 313     bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 314     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 315     qemu_put_be16(f, encoded_len);
 316     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 317     bytes_sent += encoded_len + 1 + 2;
 318     acct_info.xbzrle_pages++;
 319     acct_info.xbzrle_bytes += bytes_sent;
 320
 321     return bytes_sent;
 322 }
 323
 324
 325 /* This is the last block that we have visited serching for dirty pages
 326  */
 327 static RAMBlock *last_seen_block;
 328 /* This is the last block from where we have sent data */
 329 static RAMBlock *last_sent_block;
 330 static ram_addr_t last_offset;
 331 static unsigned long *migration_bitmap;
 332 static uint64_t migration_dirty_pages;
 333 static uint32_t last_version;
 334 static bool ram_bulk_stage;
 335
 336 static inline
 337 ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
 338                                                  ram_addr_t start)
 339 {
 340     unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
 341     unsigned long nr = base + (start >> TARGET_PAGE_BITS);
 342     unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
 343
 344     unsigned long next;
 345
 346     if (ram_bulk_stage && nr > base) {
 347         next = nr + 1;
 348     } else {
 349         next = find_next_bit(migration_bitmap, size, nr);
 350     }
 351
 352     if (next < size) {
 353         clear_bit(next, migration_bitmap);
 354         migration_dirty_pages--;
 355     }
 356     return (next - base) << TARGET_PAGE_BITS;
 357 }
 358
 359 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 360                                               ram_addr_t offset)
 361 {
 362     bool ret;
 363     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 364
 365     ret = test_and_set_bit(nr, migration_bitmap);
 366
 367     if (!ret) {
 368         migration_dirty_pages++;
 369     }
 370     return ret;
 371 }
 372
 373 /* Needs iothread lock! */
 374
 375 static void migration_bitmap_sync(void)
 376 {
 377     RAMBlock *block;
 378     ram_addr_t addr;
 379     uint64_t num_dirty_pages_init = migration_dirty_pages;
 380     MigrationState *s = migrate_get_current();
 381     static int64_t start_time;
 382     static int64_t num_dirty_pages_period;
 383     int64_t end_time;
 384
 385     if (!start_time) {
 386         start_time = qemu_get_clock_ms(rt_clock);
 387     }
 388
 389     trace_migration_bitmap_sync_start();
 390     memory_global_sync_dirty_bitmap(get_system_memory());
 391
 392     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 393         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 394             if (memory_region_test_and_clear_dirty(block->mr,
 395                                                    addr, TARGET_PAGE_SIZE,
 396                                                    DIRTY_MEMORY_MIGRATION)) {
 397                 migration_bitmap_set_dirty(block->mr, addr);
 398             }
 399         }
 400     }
 401     trace_migration_bitmap_sync_end(migration_dirty_pages
 402                                     - num_dirty_pages_init);
 403     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 404     end_time = qemu_get_clock_ms(rt_clock);
 405
 406     /* more than 1 second = 1000 millisecons */
 407     if (end_time > start_time + 1000) {
 408         s->dirty_pages_rate = num_dirty_pages_period * 1000
 409             / (end_time - start_time);
 410         s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
 411         start_time = end_time;
 412         num_dirty_pages_period = 0;
 413     }
 414 }
 415
 416 /*
 417  * ram_save_block: Writes a page of memory to the stream f
 418  *
 419  * Returns:  The number of bytes written.
 420  *           0 means no dirty pages
 421  */
 422
 423 static int ram_save_block(QEMUFile *f, bool last_stage)
 424 {
 425     RAMBlock *block = last_seen_block;
 426     ram_addr_t offset = last_offset;
 427     bool complete_round = false;
 428     int bytes_sent = 0;
 429     MemoryRegion *mr;
 430     ram_addr_t current_addr;
 431
 432     if (!block)
 433         block = QTAILQ_FIRST(&ram_list.blocks);
 434
 435     while (true) {
 436         mr = block->mr;
 437         offset = migration_bitmap_find_and_reset_dirty(mr, offset);
 438         if (complete_round && block == last_seen_block &&
 439             offset >= last_offset) {
 440             break;
 441         }
 442         if (offset >= block->length) {
 443             offset = 0;
 444             block = QTAILQ_NEXT(block, next);
 445             if (!block) {
 446                 block = QTAILQ_FIRST(&ram_list.blocks);
 447                 complete_round = true;
 448                 ram_bulk_stage = false;
 449             }
 450         } else {
 451             uint8_t *p;
 452             int cont = (block == last_sent_block) ?
 453                 RAM_SAVE_FLAG_CONTINUE : 0;
 454
 455             p = memory_region_get_ram_ptr(mr) + offset;
 456
 457             /* In doubt sent page as normal */
 458             bytes_sent = -1;
 459             if (is_zero_page(p)) {
 460                 acct_info.dup_pages++;
 461                 if (!ram_bulk_stage) {
 462                     bytes_sent = save_block_hdr(f, block, offset, cont,
 463                                                 RAM_SAVE_FLAG_COMPRESS);
 464                     qemu_put_byte(f, 0);
 465                     bytes_sent++;
 466                 } else {
 467                     acct_info.skipped_pages++;
 468                     bytes_sent = 0;
 469                 }
 470             } else if (!ram_bulk_stage && migrate_use_xbzrle()) {
 471                 current_addr = block->offset + offset;
 472                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 473                                               offset, cont, last_stage);
 474                 if (!last_stage) {
 475                     p = get_cached_data(XBZRLE.cache, current_addr);
 476                 }
 477             }
 478
 479             /* XBZRLE overflow or normal page */
 480             if (bytes_sent == -1) {
 481                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 482                 qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE);
 483                 bytes_sent += TARGET_PAGE_SIZE;
 484                 acct_info.norm_pages++;
 485             }
 486
 487             /* if page is unmodified, continue to the next */
 488             if (bytes_sent > 0) {
 489                 last_sent_block = block;
 490                 break;
 491             }
 492         }
 493     }
 494     last_seen_block = block;
 495     last_offset = offset;
 496
 497     return bytes_sent;
 498 }
 499
 500 static uint64_t bytes_transferred;
 501
 502 static ram_addr_t ram_save_remaining(void)
 503 {
 504     return migration_dirty_pages;
 505 }
 506
 507 uint64_t ram_bytes_remaining(void)
 508 {
 509     return ram_save_remaining() * TARGET_PAGE_SIZE;
 510 }
 511
 512 uint64_t ram_bytes_transferred(void)
 513 {
 514     return bytes_transferred;
 515 }
 516
 517 uint64_t ram_bytes_total(void)
 518 {
 519     RAMBlock *block;
 520     uint64_t total = 0;
 521
 522     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 523         total += block->length;
 524
 525     return total;
 526 }
 527
 528 static void migration_end(void)
 529 {
 530     if (migration_bitmap) {
 531         memory_global_dirty_log_stop();
 532         g_free(migration_bitmap);
 533         migration_bitmap = NULL;
 534     }
 535
 536     if (XBZRLE.cache) {
 537         cache_fini(XBZRLE.cache);
 538         g_free(XBZRLE.cache);
 539         g_free(XBZRLE.encoded_buf);
 540         g_free(XBZRLE.current_buf);
 541         g_free(XBZRLE.decoded_buf);
 542         XBZRLE.cache = NULL;
 543     }
 544 }
 545
 546 static void ram_migration_cancel(void *opaque)
 547 {
 548     migration_end();
 549 }
 550
 551 static void reset_ram_globals(void)
 552 {
 553     last_seen_block = NULL;
 554     last_sent_block = NULL;
 555     last_offset = 0;
 556     last_version = ram_list.version;
 557     ram_bulk_stage = true;
 558 }
 559
 560 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 561
 562 static int ram_save_setup(QEMUFile *f, void *opaque)
 563 {
 564     RAMBlock *block;
 565     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 566
 567     migration_bitmap = bitmap_new(ram_pages);
 568     bitmap_set(migration_bitmap, 0, ram_pages);
 569     migration_dirty_pages = ram_pages;
 570
 571     if (migrate_use_xbzrle()) {
 572         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 573                                   TARGET_PAGE_SIZE,
 574                                   TARGET_PAGE_SIZE);
 575         if (!XBZRLE.cache) {
 576             DPRINTF("Error creating cache\n");
 577             return -1;
 578         }
 579         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 580         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 581         acct_clear();
 582     }
 583
 584     qemu_mutex_lock_iothread();
 585     qemu_mutex_lock_ramlist();
 586     bytes_transferred = 0;
 587     reset_ram_globals();
 588
 589     memory_global_dirty_log_start();
 590     migration_bitmap_sync();
 591     qemu_mutex_unlock_iothread();
 592
 593     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 594
 595     QTAILQ_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_mutex_unlock_ramlist();
 602     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 603
 604     return 0;
 605 }
 606
 607 static int ram_save_iterate(QEMUFile *f, void *opaque)
 608 {
 609     int ret;
 610     int i;
 611     int64_t t0;
 612     int total_sent = 0;
 613
 614     qemu_mutex_lock_ramlist();
 615
 616     if (ram_list.version != last_version) {
 617         reset_ram_globals();
 618     }
 619
 620     t0 = qemu_get_clock_ns(rt_clock);
 621     i = 0;
 622     while ((ret = qemu_file_rate_limit(f)) == 0) {
 623         int bytes_sent;
 624
 625         bytes_sent = ram_save_block(f, false);
 626         /* no more blocks to sent */
 627         if (bytes_sent == 0) {
 628             break;
 629         }
 630         total_sent += bytes_sent;
 631         acct_info.iterations++;
 632         /* we want to check in the 1st loop, just in case it was the 1st time
 633            and we had to sync the dirty bitmap.
 634            qemu_get_clock_ns() is a bit expensive, so we only check each some
 635            iterations
 636         */
 637         if ((i & 63) == 0) {
 638             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 639             if (t1 > MAX_WAIT) {
 640                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 641                         t1, i);
 642                 break;
 643             }
 644         }
 645         i++;
 646     }
 647
 648     qemu_mutex_unlock_ramlist();
 649
 650     if (ret < 0) {
 651         bytes_transferred += total_sent;
 652         return ret;
 653     }
 654
 655     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 656     total_sent += 8;
 657     bytes_transferred += total_sent;
 658
 659     return total_sent;
 660 }
 661
 662 static int ram_save_complete(QEMUFile *f, void *opaque)
 663 {
 664     qemu_mutex_lock_ramlist();
 665     migration_bitmap_sync();
 666
 667     /* try transferring iterative blocks of memory */
 668
 669     /* flush all remaining blocks regardless of rate limiting */
 670     while (true) {
 671         int bytes_sent;
 672
 673         bytes_sent = ram_save_block(f, true);
 674         /* no more blocks to sent */
 675         if (bytes_sent == 0) {
 676             break;
 677         }
 678         bytes_transferred += bytes_sent;
 679     }
 680     migration_end();
 681
 682     qemu_mutex_unlock_ramlist();
 683     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 684
 685     return 0;
 686 }
 687
 688 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 689 {
 690     uint64_t remaining_size;
 691
 692     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 693
 694     if (remaining_size < max_size) {
 695         qemu_mutex_lock_iothread();
 696         migration_bitmap_sync();
 697         qemu_mutex_unlock_iothread();
 698         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 699     }
 700     return remaining_size;
 701 }
 702
 703 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 704 {
 705     int ret, rc = 0;
 706     unsigned int xh_len;
 707     int xh_flags;
 708
 709     if (!XBZRLE.decoded_buf) {
 710         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 711     }
 712
 713     /* extract RLE header */
 714     xh_flags = qemu_get_byte(f);
 715     xh_len = qemu_get_be16(f);
 716
 717     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 718         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 719         return -1;
 720     }
 721
 722     if (xh_len > TARGET_PAGE_SIZE) {
 723         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 724         return -1;
 725     }
 726     /* load data and decode */
 727     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 728
 729     /* decode RLE */
 730     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 731                                TARGET_PAGE_SIZE);
 732     if (ret == -1) {
 733         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 734         rc = -1;
 735     } else  if (ret > TARGET_PAGE_SIZE) {
 736         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 737                 ret, TARGET_PAGE_SIZE);
 738         abort();
 739     }
 740
 741     return rc;
 742 }
 743
 744 static inline void *host_from_stream_offset(QEMUFile *f,
 745                                             ram_addr_t offset,
 746                                             int flags)
 747 {
 748     static RAMBlock *block = NULL;
 749     char id[256];
 750     uint8_t len;
 751
 752     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 753         if (!block) {
 754             fprintf(stderr, "Ack, bad migration stream!\n");
 755             return NULL;
 756         }
 757
 758         return memory_region_get_ram_ptr(block->mr) + offset;
 759     }
 760
 761     len = qemu_get_byte(f);
 762     qemu_get_buffer(f, (uint8_t *)id, len);
 763     id[len] = 0;
 764
 765     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 766         if (!strncmp(id, block->idstr, sizeof(id)))
 767             return memory_region_get_ram_ptr(block->mr) + offset;
 768     }
 769
 770     fprintf(stderr, "Can't find block %s!\n", id);
 771     return NULL;
 772 }
 773
 774 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 775 {
 776     ram_addr_t addr;
 777     int flags, ret = 0;
 778     int error;
 779     static uint64_t seq_iter;
 780
 781     seq_iter++;
 782
 783     if (version_id < 4 || version_id > 4) {
 784         return -EINVAL;
 785     }
 786
 787     do {
 788         addr = qemu_get_be64(f);
 789
 790         flags = addr & ~TARGET_PAGE_MASK;
 791         addr &= TARGET_PAGE_MASK;
 792
 793         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 794             if (version_id == 4) {
 795                 /* Synchronize RAM block list */
 796                 char id[256];
 797                 ram_addr_t length;
 798                 ram_addr_t total_ram_bytes = addr;
 799
 800                 while (total_ram_bytes) {
 801                     RAMBlock *block;
 802                     uint8_t len;
 803
 804                     len = qemu_get_byte(f);
 805                     qemu_get_buffer(f, (uint8_t *)id, len);
 806                     id[len] = 0;
 807                     length = qemu_get_be64(f);
 808
 809                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 810                         if (!strncmp(id, block->idstr, sizeof(id))) {
 811                             if (block->length != length) {
 812                                 ret =  -EINVAL;
 813                                 goto done;
 814                             }
 815                             break;
 816                         }
 817                     }
 818
 819                     if (!block) {
 820                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 821                                 "accept migration\n", id);
 822                         ret = -EINVAL;
 823                         goto done;
 824                     }
 825
 826                     total_ram_bytes -= length;
 827                 }
 828             }
 829         }
 830
 831         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 832             void *host;
 833             uint8_t ch;
 834
 835             host = host_from_stream_offset(f, addr, flags);
 836             if (!host) {
 837                 return -EINVAL;
 838             }
 839
 840             ch = qemu_get_byte(f);
 841             memset(host, ch, TARGET_PAGE_SIZE);
 842 #ifndef _WIN32
 843             if (ch == 0 &&
 844                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 845                 getpagesize() <= TARGET_PAGE_SIZE) {
 846                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 847             }
 848 #endif
 849         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 850             void *host;
 851
 852             host = host_from_stream_offset(f, addr, flags);
 853             if (!host) {
 854                 return -EINVAL;
 855             }
 856
 857             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 858         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 859             void *host = host_from_stream_offset(f, addr, flags);
 860             if (!host) {
 861                 return -EINVAL;
 862             }
 863
 864             if (load_xbzrle(f, addr, host) < 0) {
 865                 ret = -EINVAL;
 866                 goto done;
 867             }
 868         }
 869         error = qemu_file_get_error(f);
 870         if (error) {
 871             ret = error;
 872             goto done;
 873         }
 874     } while (!(flags & RAM_SAVE_FLAG_EOS));
 875
 876 done:
 877     DPRINTF("Completed load of VM with exit code %d seq iteration "
 878             "%" PRIu64 "\n", ret, seq_iter);
 879     return ret;
 880 }
 881
 882 SaveVMHandlers savevm_ram_handlers = {
 883     .save_live_setup = ram_save_setup,
 884     .save_live_iterate = ram_save_iterate,
 885     .save_live_complete = ram_save_complete,
 886     .save_live_pending = ram_save_pending,
 887     .load_state = ram_load,
 888     .cancel = ram_migration_cancel,
 889 };
 890
 891 #ifdef HAS_AUDIO
 892 struct soundhw {
 893     const char *name;
 894     const char *descr;
 895     int enabled;
 896     int isa;
 897     union {
 898         int (*init_isa) (ISABus *bus);
 899         int (*init_pci) (PCIBus *bus);
 900     } init;
 901 };
 902
 903 static struct soundhw soundhw[] = {
 904 #ifdef HAS_AUDIO_CHOICE
 905 #ifdef CONFIG_PCSPK
 906     {
 907         "pcspk",
 908         "PC speaker",
 909         0,
 910         1,
 911         { .init_isa = pcspk_audio_init }
 912     },
 913 #endif
 914
 915 #ifdef CONFIG_SB16
 916     {
 917         "sb16",
 918         "Creative Sound Blaster 16",
 919         0,
 920         1,
 921         { .init_isa = SB16_init }
 922     },
 923 #endif
 924
 925 #ifdef CONFIG_CS4231A
 926     {
 927         "cs4231a",
 928         "CS4231A",
 929         0,
 930         1,
 931         { .init_isa = cs4231a_init }
 932     },
 933 #endif
 934
 935 #ifdef CONFIG_ADLIB
 936     {
 937         "adlib",
 938 #ifdef HAS_YMF262
 939         "Yamaha YMF262 (OPL3)",
 940 #else
 941         "Yamaha YM3812 (OPL2)",
 942 #endif
 943         0,
 944         1,
 945         { .init_isa = Adlib_init }
 946     },
 947 #endif
 948
 949 #ifdef CONFIG_GUS
 950     {
 951         "gus",
 952         "Gravis Ultrasound GF1",
 953         0,
 954         1,
 955         { .init_isa = GUS_init }
 956     },
 957 #endif
 958
 959 #ifdef CONFIG_AC97
 960     {
 961         "ac97",
 962         "Intel 82801AA AC97 Audio",
 963         0,
 964         0,
 965         { .init_pci = ac97_init }
 966     },
 967 #endif
 968
 969 #ifdef CONFIG_ES1370
 970     {
 971         "es1370",
 972         "ENSONIQ AudioPCI ES1370",
 973         0,
 974         0,
 975         { .init_pci = es1370_init }
 976     },
 977 #endif
 978
 979 #ifdef CONFIG_HDA
 980     {
 981         "hda",
 982         "Intel HD Audio",
 983         0,
 984         0,
 985         { .init_pci = intel_hda_and_codec_init }
 986     },
 987 #endif
 988
 989 #endif /* HAS_AUDIO_CHOICE */
 990
 991     { NULL, NULL, 0, 0, { NULL } }
 992 };
 993
 994 void select_soundhw(const char *optarg)
 995 {
 996     struct soundhw *c;
 997
 998     if (is_help_option(optarg)) {
 999     show_valid_cards:
1000
1001 #ifdef HAS_AUDIO_CHOICE
1002         printf("Valid sound card names (comma separated):\n");
1003         for (c = soundhw; c->name; ++c) {
1004             printf ("%-11s %s\n", c->name, c->descr);
1005         }
1006         printf("\n-soundhw all will enable all of the above\n");
1007 #else
1008         printf("Machine has no user-selectable audio hardware "
1009                "(it may or may not have always-present audio hardware).\n");
1010 #endif
1011         exit(!is_help_option(optarg));
1012     }
1013     else {
1014         size_t l;
1015         const char *p;
1016         char *e;
1017         int bad_card = 0;
1018
1019         if (!strcmp(optarg, "all")) {
1020             for (c = soundhw; c->name; ++c) {
1021                 c->enabled = 1;
1022             }
1023             return;
1024         }
1025
1026         p = optarg;
1027         while (*p) {
1028             e = strchr(p, ',');
1029             l = !e ? strlen(p) : (size_t) (e - p);
1030
1031             for (c = soundhw; c->name; ++c) {
1032                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1033                     c->enabled = 1;
1034                     break;
1035                 }
1036             }
1037
1038             if (!c->name) {
1039                 if (l > 80) {
1040                     fprintf(stderr,
1041                             "Unknown sound card name (too big to show)\n");
1042                 }
1043                 else {
1044                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1045                             (int) l, p);
1046                 }
1047                 bad_card = 1;
1048             }
1049             p += l + (e != NULL);
1050         }
1051
1052         if (bad_card) {
1053             goto show_valid_cards;
1054         }
1055     }
1056 }
1057
1058 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1059 {
1060     struct soundhw *c;
1061
1062     for (c = soundhw; c->name; ++c) {
1063         if (c->enabled) {
1064             if (c->isa) {
1065                 if (isa_bus) {
1066                     c->init.init_isa(isa_bus);
1067                 }
1068             } else {
1069                 if (pci_bus) {
1070                     c->init.init_pci(pci_bus);
1071                 }
1072             }
1073         }
1074     }
1075 }
1076 #else
1077 void select_soundhw(const char *optarg)
1078 {
1079 }
1080 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1081 {
1082 }
1083 #endif
1084
1085 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1086 {
1087     int ret;
1088
1089     if (strlen(str) != 36) {
1090         return -1;
1091     }
1092
1093     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1094                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1095                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1096                  &uuid[15]);
1097
1098     if (ret != 16) {
1099         return -1;
1100     }
1101 #ifdef TARGET_I386
1102     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1103 #endif
1104     return 0;
1105 }
1106
1107 void do_acpitable_option(const QemuOpts *opts)
1108 {
1109 #ifdef TARGET_I386
1110     Error *err = NULL;
1111
1112     acpi_table_add(opts, &err);
1113     if (err) {
1114         fprintf(stderr, "Wrong acpi table provided: %s\n",
1115                 error_get_pretty(err));
1116         error_free(err);
1117         exit(1);
1118     }
1119 #endif
1120 }
1121
1122 void do_smbios_option(const char *optarg)
1123 {
1124 #ifdef TARGET_I386
1125     if (smbios_entry_add(optarg) < 0) {
1126         fprintf(stderr, "Wrong smbios provided\n");
1127         exit(1);
1128     }
1129 #endif
1130 }
1131
1132 void cpudef_init(void)
1133 {
1134 #if defined(cpudef_setup)
1135     cpudef_setup(); /* parse cpu definitions in target config file */
1136 #endif
1137 }
1138
1139 int audio_available(void)
1140 {
1141 #ifdef HAS_AUDIO
1142     return 1;
1143 #else
1144     return 0;
1145 #endif
1146 }
1147
1148 int tcg_available(void)
1149 {
1150     return 1;
1151 }
1152
1153 int kvm_available(void)
1154 {
1155 #ifdef CONFIG_KVM
1156     return 1;
1157 #else
1158     return 0;
1159 #endif
1160 }
1161
1162 int xen_available(void)
1163 {
1164 #ifdef CONFIG_XEN
1165     return 1;
1166 #else
1167     return 0;
1168 #endif
1169 }
1170
1171
1172 TargetInfo *qmp_query_target(Error **errp)
1173 {
1174     TargetInfo *info = g_malloc0(sizeof(*info));
1175
1176     info->arch = TARGET_TYPE;
1177
1178     return info;
1179 }