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/pc.h"
  39 #include "hw/pci/pci.h"
  40 #include "hw/audiodev.h"
  41 #include "sysemu/kvm.h"
  42 #include "migration/migration.h"
  43 #include "exec/gdbstub.h"
  44 #include "hw/smbios.h"
  45 #include "exec/address-spaces.h"
  46 #include "hw/pcspk.h"
  47 #include "migration/page_cache.h"
  48 #include "qemu/config-file.h"
  49 #include "qmp-commands.h"
  50 #include "trace.h"
  51 #include "exec/cpu-all.h"
  52
  53 #ifdef DEBUG_ARCH_INIT
  54 #define DPRINTF(fmt, ...) \
  55     do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
  56 #else
  57 #define DPRINTF(fmt, ...) \
  58     do { } while (0)
  59 #endif
  60
  61 #ifdef TARGET_SPARC
  62 int graphic_width = 1024;
  63 int graphic_height = 768;
  64 int graphic_depth = 8;
  65 #else
  66 int graphic_width = 800;
  67 int graphic_height = 600;
  68 int graphic_depth = 15;
  69 #endif
  70
  71
  72 #if defined(TARGET_ALPHA)
  73 #define QEMU_ARCH QEMU_ARCH_ALPHA
  74 #elif defined(TARGET_ARM)
  75 #define QEMU_ARCH QEMU_ARCH_ARM
  76 #elif defined(TARGET_CRIS)
  77 #define QEMU_ARCH QEMU_ARCH_CRIS
  78 #elif defined(TARGET_I386)
  79 #define QEMU_ARCH QEMU_ARCH_I386
  80 #elif defined(TARGET_M68K)
  81 #define QEMU_ARCH QEMU_ARCH_M68K
  82 #elif defined(TARGET_LM32)
  83 #define QEMU_ARCH QEMU_ARCH_LM32
  84 #elif defined(TARGET_MICROBLAZE)
  85 #define QEMU_ARCH QEMU_ARCH_MICROBLAZE
  86 #elif defined(TARGET_MIPS)
  87 #define QEMU_ARCH QEMU_ARCH_MIPS
  88 #elif defined(TARGET_MOXIE)
  89 #define QEMU_ARCH QEMU_ARCH_MOXIE
  90 #elif defined(TARGET_OPENRISC)
  91 #define QEMU_ARCH QEMU_ARCH_OPENRISC
  92 #elif defined(TARGET_PPC)
  93 #define QEMU_ARCH QEMU_ARCH_PPC
  94 #elif defined(TARGET_S390X)
  95 #define QEMU_ARCH QEMU_ARCH_S390X
  96 #elif defined(TARGET_SH4)
  97 #define QEMU_ARCH QEMU_ARCH_SH4
  98 #elif defined(TARGET_SPARC)
  99 #define QEMU_ARCH QEMU_ARCH_SPARC
 100 #elif defined(TARGET_XTENSA)
 101 #define QEMU_ARCH QEMU_ARCH_XTENSA
 102 #elif defined(TARGET_UNICORE32)
 103 #define QEMU_ARCH QEMU_ARCH_UNICORE32
 104 #endif
 105
 106 const uint32_t arch_type = QEMU_ARCH;
 107
 108 /***********************************************************/
 109 /* ram save/restore */
 110
 111 #define RAM_SAVE_FLAG_FULL     0x01 /* Obsolete, not used anymore */
 112 #define RAM_SAVE_FLAG_COMPRESS 0x02
 113 #define RAM_SAVE_FLAG_MEM_SIZE 0x04
 114 #define RAM_SAVE_FLAG_PAGE     0x08
 115 #define RAM_SAVE_FLAG_EOS      0x10
 116 #define RAM_SAVE_FLAG_CONTINUE 0x20
 117 #define RAM_SAVE_FLAG_XBZRLE   0x40
 118
 119
 120 static struct defconfig_file {
 121     const char *filename;
 122     /* Indicates it is an user config file (disabled by -no-user-config) */
 123     bool userconfig;
 124 } default_config_files[] = {
 125     { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
 126     { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
 127     { NULL }, /* end of list */
 128 };
 129
 130
 131 int qemu_read_default_config_files(bool userconfig)
 132 {
 133     int ret;
 134     struct defconfig_file *f;
 135
 136     for (f = default_config_files; f->filename; f++) {
 137         if (!userconfig && f->userconfig) {
 138             continue;
 139         }
 140         ret = qemu_read_config_file(f->filename);
 141         if (ret < 0 && ret != -ENOENT) {
 142             return ret;
 143         }
 144     }
 145
 146     return 0;
 147 }
 148
 149 static inline bool is_zero_page(uint8_t *p)
 150 {
 151     return buffer_find_nonzero_offset(p, TARGET_PAGE_SIZE) ==
 152         TARGET_PAGE_SIZE;
 153 }
 154
 155 /* struct contains XBZRLE cache and a static page
 156    used by the compression */
 157 static struct {
 158     /* buffer used for XBZRLE encoding */
 159     uint8_t *encoded_buf;
 160     /* buffer for storing page content */
 161     uint8_t *current_buf;
 162     /* buffer used for XBZRLE decoding */
 163     uint8_t *decoded_buf;
 164     /* Cache for XBZRLE */
 165     PageCache *cache;
 166 } XBZRLE = {
 167     .encoded_buf = NULL,
 168     .current_buf = NULL,
 169     .decoded_buf = NULL,
 170     .cache = NULL,
 171 };
 172
 173
 174 int64_t xbzrle_cache_resize(int64_t new_size)
 175 {
 176     if (XBZRLE.cache != NULL) {
 177         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 178             TARGET_PAGE_SIZE;
 179     }
 180     return pow2floor(new_size);
 181 }
 182
 183 /* accounting for migration statistics */
 184 typedef struct AccountingInfo {
 185     uint64_t dup_pages;
 186     uint64_t norm_pages;
 187     uint64_t iterations;
 188     uint64_t xbzrle_bytes;
 189     uint64_t xbzrle_pages;
 190     uint64_t xbzrle_cache_miss;
 191     uint64_t xbzrle_overflows;
 192 } AccountingInfo;
 193
 194 static AccountingInfo acct_info;
 195
 196 static void acct_clear(void)
 197 {
 198     memset(&acct_info, 0, sizeof(acct_info));
 199 }
 200
 201 uint64_t dup_mig_bytes_transferred(void)
 202 {
 203     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 204 }
 205
 206 uint64_t dup_mig_pages_transferred(void)
 207 {
 208     return acct_info.dup_pages;
 209 }
 210
 211 uint64_t norm_mig_bytes_transferred(void)
 212 {
 213     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 214 }
 215
 216 uint64_t norm_mig_pages_transferred(void)
 217 {
 218     return acct_info.norm_pages;
 219 }
 220
 221 uint64_t xbzrle_mig_bytes_transferred(void)
 222 {
 223     return acct_info.xbzrle_bytes;
 224 }
 225
 226 uint64_t xbzrle_mig_pages_transferred(void)
 227 {
 228     return acct_info.xbzrle_pages;
 229 }
 230
 231 uint64_t xbzrle_mig_pages_cache_miss(void)
 232 {
 233     return acct_info.xbzrle_cache_miss;
 234 }
 235
 236 uint64_t xbzrle_mig_pages_overflow(void)
 237 {
 238     return acct_info.xbzrle_overflows;
 239 }
 240
 241 static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 242                              int cont, int flag)
 243 {
 244     size_t size;
 245
 246     qemu_put_be64(f, offset | cont | flag);
 247     size = 8;
 248
 249     if (!cont) {
 250         qemu_put_byte(f, strlen(block->idstr));
 251         qemu_put_buffer(f, (uint8_t *)block->idstr,
 252                         strlen(block->idstr));
 253         size += 1 + strlen(block->idstr);
 254     }
 255     return size;
 256 }
 257
 258 #define ENCODING_FLAG_XBZRLE 0x1
 259
 260 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 261                             ram_addr_t current_addr, RAMBlock *block,
 262                             ram_addr_t offset, int cont, bool last_stage)
 263 {
 264     int encoded_len = 0, bytes_sent = -1;
 265     uint8_t *prev_cached_page;
 266
 267     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 268         if (!last_stage) {
 269             cache_insert(XBZRLE.cache, current_addr, current_data);
 270         }
 271         acct_info.xbzrle_cache_miss++;
 272         return -1;
 273     }
 274
 275     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 276
 277     /* save current buffer into memory */
 278     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 279
 280     /* XBZRLE encoding (if there is no overflow) */
 281     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 282                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 283                                        TARGET_PAGE_SIZE);
 284     if (encoded_len == 0) {
 285         DPRINTF("Skipping unmodified page\n");
 286         return 0;
 287     } else if (encoded_len == -1) {
 288         DPRINTF("Overflow\n");
 289         acct_info.xbzrle_overflows++;
 290         /* update data in the cache */
 291         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 292         return -1;
 293     }
 294
 295     /* we need to update the data in the cache, in order to get the same data */
 296     if (!last_stage) {
 297         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 298     }
 299
 300     /* Send XBZRLE based compressed page */
 301     bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 302     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 303     qemu_put_be16(f, encoded_len);
 304     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 305     bytes_sent += encoded_len + 1 + 2;
 306     acct_info.xbzrle_pages++;
 307     acct_info.xbzrle_bytes += bytes_sent;
 308
 309     return bytes_sent;
 310 }
 311
 312
 313 /* This is the last block that we have visited serching for dirty pages
 314  */
 315 static RAMBlock *last_seen_block;
 316 /* This is the last block from where we have sent data */
 317 static RAMBlock *last_sent_block;
 318 static ram_addr_t last_offset;
 319 static unsigned long *migration_bitmap;
 320 static uint64_t migration_dirty_pages;
 321 static uint32_t last_version;
 322
 323 static inline
 324 ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
 325                                                  ram_addr_t start)
 326 {
 327     unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
 328     unsigned long nr = base + (start >> TARGET_PAGE_BITS);
 329     unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
 330
 331     unsigned long next = find_next_bit(migration_bitmap, size, nr);
 332
 333     if (next < size) {
 334         clear_bit(next, migration_bitmap);
 335         migration_dirty_pages--;
 336     }
 337     return (next - base) << TARGET_PAGE_BITS;
 338 }
 339
 340 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 341                                               ram_addr_t offset)
 342 {
 343     bool ret;
 344     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 345
 346     ret = test_and_set_bit(nr, migration_bitmap);
 347
 348     if (!ret) {
 349         migration_dirty_pages++;
 350     }
 351     return ret;
 352 }
 353
 354 /* Needs iothread lock! */
 355
 356 static void migration_bitmap_sync(void)
 357 {
 358     RAMBlock *block;
 359     ram_addr_t addr;
 360     uint64_t num_dirty_pages_init = migration_dirty_pages;
 361     MigrationState *s = migrate_get_current();
 362     static int64_t start_time;
 363     static int64_t num_dirty_pages_period;
 364     int64_t end_time;
 365
 366     if (!start_time) {
 367         start_time = qemu_get_clock_ms(rt_clock);
 368     }
 369
 370     trace_migration_bitmap_sync_start();
 371     memory_global_sync_dirty_bitmap(get_system_memory());
 372
 373     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 374         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 375             if (memory_region_test_and_clear_dirty(block->mr,
 376                                                    addr, TARGET_PAGE_SIZE,
 377                                                    DIRTY_MEMORY_MIGRATION)) {
 378                 migration_bitmap_set_dirty(block->mr, addr);
 379             }
 380         }
 381     }
 382     trace_migration_bitmap_sync_end(migration_dirty_pages
 383                                     - num_dirty_pages_init);
 384     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 385     end_time = qemu_get_clock_ms(rt_clock);
 386
 387     /* more than 1 second = 1000 millisecons */
 388     if (end_time > start_time + 1000) {
 389         s->dirty_pages_rate = num_dirty_pages_period * 1000
 390             / (end_time - start_time);
 391         s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
 392         start_time = end_time;
 393         num_dirty_pages_period = 0;
 394     }
 395 }
 396
 397 /*
 398  * ram_save_block: Writes a page of memory to the stream f
 399  *
 400  * Returns:  The number of bytes written.
 401  *           0 means no dirty pages
 402  */
 403
 404 static int ram_save_block(QEMUFile *f, bool last_stage)
 405 {
 406     RAMBlock *block = last_seen_block;
 407     ram_addr_t offset = last_offset;
 408     bool complete_round = false;
 409     int bytes_sent = 0;
 410     MemoryRegion *mr;
 411     ram_addr_t current_addr;
 412
 413     if (!block)
 414         block = QTAILQ_FIRST(&ram_list.blocks);
 415
 416     while (true) {
 417         mr = block->mr;
 418         offset = migration_bitmap_find_and_reset_dirty(mr, offset);
 419         if (complete_round && block == last_seen_block &&
 420             offset >= last_offset) {
 421             break;
 422         }
 423         if (offset >= block->length) {
 424             offset = 0;
 425             block = QTAILQ_NEXT(block, next);
 426             if (!block) {
 427                 block = QTAILQ_FIRST(&ram_list.blocks);
 428                 complete_round = true;
 429             }
 430         } else {
 431             uint8_t *p;
 432             int cont = (block == last_sent_block) ?
 433                 RAM_SAVE_FLAG_CONTINUE : 0;
 434
 435             p = memory_region_get_ram_ptr(mr) + offset;
 436
 437             /* In doubt sent page as normal */
 438             bytes_sent = -1;
 439             if (is_zero_page(p)) {
 440                 acct_info.dup_pages++;
 441                 bytes_sent = save_block_hdr(f, block, offset, cont,
 442                                             RAM_SAVE_FLAG_COMPRESS);
 443                 qemu_put_byte(f, 0);
 444                 bytes_sent++;
 445             } else if (migrate_use_xbzrle()) {
 446                 current_addr = block->offset + offset;
 447                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 448                                               offset, cont, last_stage);
 449                 if (!last_stage) {
 450                     p = get_cached_data(XBZRLE.cache, current_addr);
 451                 }
 452             }
 453
 454             /* XBZRLE overflow or normal page */
 455             if (bytes_sent == -1) {
 456                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 457                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 458                 bytes_sent += TARGET_PAGE_SIZE;
 459                 acct_info.norm_pages++;
 460             }
 461
 462             /* if page is unmodified, continue to the next */
 463             if (bytes_sent > 0) {
 464                 last_sent_block = block;
 465                 break;
 466             }
 467         }
 468     }
 469     last_seen_block = block;
 470     last_offset = offset;
 471
 472     return bytes_sent;
 473 }
 474
 475 static uint64_t bytes_transferred;
 476
 477 static ram_addr_t ram_save_remaining(void)
 478 {
 479     return migration_dirty_pages;
 480 }
 481
 482 uint64_t ram_bytes_remaining(void)
 483 {
 484     return ram_save_remaining() * TARGET_PAGE_SIZE;
 485 }
 486
 487 uint64_t ram_bytes_transferred(void)
 488 {
 489     return bytes_transferred;
 490 }
 491
 492 uint64_t ram_bytes_total(void)
 493 {
 494     RAMBlock *block;
 495     uint64_t total = 0;
 496
 497     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 498         total += block->length;
 499
 500     return total;
 501 }
 502
 503 static void migration_end(void)
 504 {
 505     if (migration_bitmap) {
 506         memory_global_dirty_log_stop();
 507         g_free(migration_bitmap);
 508         migration_bitmap = NULL;
 509     }
 510
 511     if (XBZRLE.cache) {
 512         cache_fini(XBZRLE.cache);
 513         g_free(XBZRLE.cache);
 514         g_free(XBZRLE.encoded_buf);
 515         g_free(XBZRLE.current_buf);
 516         g_free(XBZRLE.decoded_buf);
 517         XBZRLE.cache = NULL;
 518     }
 519 }
 520
 521 static void ram_migration_cancel(void *opaque)
 522 {
 523     migration_end();
 524 }
 525
 526 static void reset_ram_globals(void)
 527 {
 528     last_seen_block = NULL;
 529     last_sent_block = NULL;
 530     last_offset = 0;
 531     last_version = ram_list.version;
 532 }
 533
 534 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 535
 536 static int ram_save_setup(QEMUFile *f, void *opaque)
 537 {
 538     RAMBlock *block;
 539     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 540
 541     migration_bitmap = bitmap_new(ram_pages);
 542     bitmap_set(migration_bitmap, 0, ram_pages);
 543     migration_dirty_pages = ram_pages;
 544
 545     if (migrate_use_xbzrle()) {
 546         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 547                                   TARGET_PAGE_SIZE,
 548                                   TARGET_PAGE_SIZE);
 549         if (!XBZRLE.cache) {
 550             DPRINTF("Error creating cache\n");
 551             return -1;
 552         }
 553         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 554         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 555         acct_clear();
 556     }
 557
 558     qemu_mutex_lock_iothread();
 559     qemu_mutex_lock_ramlist();
 560     bytes_transferred = 0;
 561     reset_ram_globals();
 562
 563     memory_global_dirty_log_start();
 564     migration_bitmap_sync();
 565     qemu_mutex_unlock_iothread();
 566
 567     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 568
 569     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 570         qemu_put_byte(f, strlen(block->idstr));
 571         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 572         qemu_put_be64(f, block->length);
 573     }
 574
 575     qemu_mutex_unlock_ramlist();
 576     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 577
 578     return 0;
 579 }
 580
 581 static int ram_save_iterate(QEMUFile *f, void *opaque)
 582 {
 583     int ret;
 584     int i;
 585     int64_t t0;
 586     int total_sent = 0;
 587
 588     qemu_mutex_lock_ramlist();
 589
 590     if (ram_list.version != last_version) {
 591         reset_ram_globals();
 592     }
 593
 594     t0 = qemu_get_clock_ns(rt_clock);
 595     i = 0;
 596     while ((ret = qemu_file_rate_limit(f)) == 0) {
 597         int bytes_sent;
 598
 599         bytes_sent = ram_save_block(f, false);
 600         /* no more blocks to sent */
 601         if (bytes_sent == 0) {
 602             break;
 603         }
 604         total_sent += bytes_sent;
 605         acct_info.iterations++;
 606         /* we want to check in the 1st loop, just in case it was the 1st time
 607            and we had to sync the dirty bitmap.
 608            qemu_get_clock_ns() is a bit expensive, so we only check each some
 609            iterations
 610         */
 611         if ((i & 63) == 0) {
 612             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 613             if (t1 > MAX_WAIT) {
 614                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 615                         t1, i);
 616                 break;
 617             }
 618         }
 619         i++;
 620     }
 621
 622     qemu_mutex_unlock_ramlist();
 623
 624     if (ret < 0) {
 625         bytes_transferred += total_sent;
 626         return ret;
 627     }
 628
 629     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 630     total_sent += 8;
 631     bytes_transferred += total_sent;
 632
 633     return total_sent;
 634 }
 635
 636 static int ram_save_complete(QEMUFile *f, void *opaque)
 637 {
 638     qemu_mutex_lock_ramlist();
 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     migration_end();
 655
 656     qemu_mutex_unlock_ramlist();
 657     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 658
 659     return 0;
 660 }
 661
 662 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 663 {
 664     uint64_t remaining_size;
 665
 666     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 667
 668     if (remaining_size < max_size) {
 669         qemu_mutex_lock_iothread();
 670         migration_bitmap_sync();
 671         qemu_mutex_unlock_iothread();
 672         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 673     }
 674     return remaining_size;
 675 }
 676
 677 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 678 {
 679     int ret, rc = 0;
 680     unsigned int xh_len;
 681     int xh_flags;
 682
 683     if (!XBZRLE.decoded_buf) {
 684         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 685     }
 686
 687     /* extract RLE header */
 688     xh_flags = qemu_get_byte(f);
 689     xh_len = qemu_get_be16(f);
 690
 691     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 692         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 693         return -1;
 694     }
 695
 696     if (xh_len > TARGET_PAGE_SIZE) {
 697         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 698         return -1;
 699     }
 700     /* load data and decode */
 701     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 702
 703     /* decode RLE */
 704     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 705                                TARGET_PAGE_SIZE);
 706     if (ret == -1) {
 707         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 708         rc = -1;
 709     } else  if (ret > TARGET_PAGE_SIZE) {
 710         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 711                 ret, TARGET_PAGE_SIZE);
 712         abort();
 713     }
 714
 715     return rc;
 716 }
 717
 718 static inline void *host_from_stream_offset(QEMUFile *f,
 719                                             ram_addr_t offset,
 720                                             int flags)
 721 {
 722     static RAMBlock *block = NULL;
 723     char id[256];
 724     uint8_t len;
 725
 726     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 727         if (!block) {
 728             fprintf(stderr, "Ack, bad migration stream!\n");
 729             return NULL;
 730         }
 731
 732         return memory_region_get_ram_ptr(block->mr) + offset;
 733     }
 734
 735     len = qemu_get_byte(f);
 736     qemu_get_buffer(f, (uint8_t *)id, len);
 737     id[len] = 0;
 738
 739     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 740         if (!strncmp(id, block->idstr, sizeof(id)))
 741             return memory_region_get_ram_ptr(block->mr) + offset;
 742     }
 743
 744     fprintf(stderr, "Can't find block %s!\n", id);
 745     return NULL;
 746 }
 747
 748 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 749 {
 750     ram_addr_t addr;
 751     int flags, ret = 0;
 752     int error;
 753     static uint64_t seq_iter;
 754
 755     seq_iter++;
 756
 757     if (version_id < 4 || version_id > 4) {
 758         return -EINVAL;
 759     }
 760
 761     do {
 762         addr = qemu_get_be64(f);
 763
 764         flags = addr & ~TARGET_PAGE_MASK;
 765         addr &= TARGET_PAGE_MASK;
 766
 767         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 768             if (version_id == 4) {
 769                 /* Synchronize RAM block list */
 770                 char id[256];
 771                 ram_addr_t length;
 772                 ram_addr_t total_ram_bytes = addr;
 773
 774                 while (total_ram_bytes) {
 775                     RAMBlock *block;
 776                     uint8_t len;
 777
 778                     len = qemu_get_byte(f);
 779                     qemu_get_buffer(f, (uint8_t *)id, len);
 780                     id[len] = 0;
 781                     length = qemu_get_be64(f);
 782
 783                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 784                         if (!strncmp(id, block->idstr, sizeof(id))) {
 785                             if (block->length != length) {
 786                                 ret =  -EINVAL;
 787                                 goto done;
 788                             }
 789                             break;
 790                         }
 791                     }
 792
 793                     if (!block) {
 794                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 795                                 "accept migration\n", id);
 796                         ret = -EINVAL;
 797                         goto done;
 798                     }
 799
 800                     total_ram_bytes -= length;
 801                 }
 802             }
 803         }
 804
 805         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 806             void *host;
 807             uint8_t ch;
 808
 809             host = host_from_stream_offset(f, addr, flags);
 810             if (!host) {
 811                 return -EINVAL;
 812             }
 813
 814             ch = qemu_get_byte(f);
 815             memset(host, ch, TARGET_PAGE_SIZE);
 816 #ifndef _WIN32
 817             if (ch == 0 &&
 818                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 819                 getpagesize() <= TARGET_PAGE_SIZE) {
 820                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 821             }
 822 #endif
 823         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 824             void *host;
 825
 826             host = host_from_stream_offset(f, addr, flags);
 827             if (!host) {
 828                 return -EINVAL;
 829             }
 830
 831             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 832         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 833             void *host = host_from_stream_offset(f, addr, flags);
 834             if (!host) {
 835                 return -EINVAL;
 836             }
 837
 838             if (load_xbzrle(f, addr, host) < 0) {
 839                 ret = -EINVAL;
 840                 goto done;
 841             }
 842         }
 843         error = qemu_file_get_error(f);
 844         if (error) {
 845             ret = error;
 846             goto done;
 847         }
 848     } while (!(flags & RAM_SAVE_FLAG_EOS));
 849
 850 done:
 851     DPRINTF("Completed load of VM with exit code %d seq iteration "
 852             "%" PRIu64 "\n", ret, seq_iter);
 853     return ret;
 854 }
 855
 856 SaveVMHandlers savevm_ram_handlers = {
 857     .save_live_setup = ram_save_setup,
 858     .save_live_iterate = ram_save_iterate,
 859     .save_live_complete = ram_save_complete,
 860     .save_live_pending = ram_save_pending,
 861     .load_state = ram_load,
 862     .cancel = ram_migration_cancel,
 863 };
 864
 865 #ifdef HAS_AUDIO
 866 struct soundhw {
 867     const char *name;
 868     const char *descr;
 869     int enabled;
 870     int isa;
 871     union {
 872         int (*init_isa) (ISABus *bus);
 873         int (*init_pci) (PCIBus *bus);
 874     } init;
 875 };
 876
 877 static struct soundhw soundhw[] = {
 878 #ifdef HAS_AUDIO_CHOICE
 879 #ifdef CONFIG_PCSPK
 880     {
 881         "pcspk",
 882         "PC speaker",
 883         0,
 884         1,
 885         { .init_isa = pcspk_audio_init }
 886     },
 887 #endif
 888
 889 #ifdef CONFIG_SB16
 890     {
 891         "sb16",
 892         "Creative Sound Blaster 16",
 893         0,
 894         1,
 895         { .init_isa = SB16_init }
 896     },
 897 #endif
 898
 899 #ifdef CONFIG_CS4231A
 900     {
 901         "cs4231a",
 902         "CS4231A",
 903         0,
 904         1,
 905         { .init_isa = cs4231a_init }
 906     },
 907 #endif
 908
 909 #ifdef CONFIG_ADLIB
 910     {
 911         "adlib",
 912 #ifdef HAS_YMF262
 913         "Yamaha YMF262 (OPL3)",
 914 #else
 915         "Yamaha YM3812 (OPL2)",
 916 #endif
 917         0,
 918         1,
 919         { .init_isa = Adlib_init }
 920     },
 921 #endif
 922
 923 #ifdef CONFIG_GUS
 924     {
 925         "gus",
 926         "Gravis Ultrasound GF1",
 927         0,
 928         1,
 929         { .init_isa = GUS_init }
 930     },
 931 #endif
 932
 933 #ifdef CONFIG_AC97
 934     {
 935         "ac97",
 936         "Intel 82801AA AC97 Audio",
 937         0,
 938         0,
 939         { .init_pci = ac97_init }
 940     },
 941 #endif
 942
 943 #ifdef CONFIG_ES1370
 944     {
 945         "es1370",
 946         "ENSONIQ AudioPCI ES1370",
 947         0,
 948         0,
 949         { .init_pci = es1370_init }
 950     },
 951 #endif
 952
 953 #ifdef CONFIG_HDA
 954     {
 955         "hda",
 956         "Intel HD Audio",
 957         0,
 958         0,
 959         { .init_pci = intel_hda_and_codec_init }
 960     },
 961 #endif
 962
 963 #endif /* HAS_AUDIO_CHOICE */
 964
 965     { NULL, NULL, 0, 0, { NULL } }
 966 };
 967
 968 void select_soundhw(const char *optarg)
 969 {
 970     struct soundhw *c;
 971
 972     if (is_help_option(optarg)) {
 973     show_valid_cards:
 974
 975 #ifdef HAS_AUDIO_CHOICE
 976         printf("Valid sound card names (comma separated):\n");
 977         for (c = soundhw; c->name; ++c) {
 978             printf ("%-11s %s\n", c->name, c->descr);
 979         }
 980         printf("\n-soundhw all will enable all of the above\n");
 981 #else
 982         printf("Machine has no user-selectable audio hardware "
 983                "(it may or may not have always-present audio hardware).\n");
 984 #endif
 985         exit(!is_help_option(optarg));
 986     }
 987     else {
 988         size_t l;
 989         const char *p;
 990         char *e;
 991         int bad_card = 0;
 992
 993         if (!strcmp(optarg, "all")) {
 994             for (c = soundhw; c->name; ++c) {
 995                 c->enabled = 1;
 996             }
 997             return;
 998         }
 999
1000         p = optarg;
1001         while (*p) {
1002             e = strchr(p, ',');
1003             l = !e ? strlen(p) : (size_t) (e - p);
1004
1005             for (c = soundhw; c->name; ++c) {
1006                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1007                     c->enabled = 1;
1008                     break;
1009                 }
1010             }
1011
1012             if (!c->name) {
1013                 if (l > 80) {
1014                     fprintf(stderr,
1015                             "Unknown sound card name (too big to show)\n");
1016                 }
1017                 else {
1018                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1019                             (int) l, p);
1020                 }
1021                 bad_card = 1;
1022             }
1023             p += l + (e != NULL);
1024         }
1025
1026         if (bad_card) {
1027             goto show_valid_cards;
1028         }
1029     }
1030 }
1031
1032 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1033 {
1034     struct soundhw *c;
1035
1036     for (c = soundhw; c->name; ++c) {
1037         if (c->enabled) {
1038             if (c->isa) {
1039                 if (isa_bus) {
1040                     c->init.init_isa(isa_bus);
1041                 }
1042             } else {
1043                 if (pci_bus) {
1044                     c->init.init_pci(pci_bus);
1045                 }
1046             }
1047         }
1048     }
1049 }
1050 #else
1051 void select_soundhw(const char *optarg)
1052 {
1053 }
1054 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1055 {
1056 }
1057 #endif
1058
1059 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1060 {
1061     int ret;
1062
1063     if (strlen(str) != 36) {
1064         return -1;
1065     }
1066
1067     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1068                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1069                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1070                  &uuid[15]);
1071
1072     if (ret != 16) {
1073         return -1;
1074     }
1075 #ifdef TARGET_I386
1076     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1077 #endif
1078     return 0;
1079 }
1080
1081 void do_acpitable_option(const char *optarg)
1082 {
1083 #ifdef TARGET_I386
1084     if (acpi_table_add(optarg) < 0) {
1085         fprintf(stderr, "Wrong acpi table provided\n");
1086         exit(1);
1087     }
1088 #endif
1089 }
1090
1091 void do_smbios_option(const char *optarg)
1092 {
1093 #ifdef TARGET_I386
1094     if (smbios_entry_add(optarg) < 0) {
1095         fprintf(stderr, "Wrong smbios provided\n");
1096         exit(1);
1097     }
1098 #endif
1099 }
1100
1101 void cpudef_init(void)
1102 {
1103 #if defined(cpudef_setup)
1104     cpudef_setup(); /* parse cpu definitions in target config file */
1105 #endif
1106 }
1107
1108 int audio_available(void)
1109 {
1110 #ifdef HAS_AUDIO
1111     return 1;
1112 #else
1113     return 0;
1114 #endif
1115 }
1116
1117 int tcg_available(void)
1118 {
1119     return 1;
1120 }
1121
1122 int kvm_available(void)
1123 {
1124 #ifdef CONFIG_KVM
1125     return 1;
1126 #else
1127     return 0;
1128 #endif
1129 }
1130
1131 int xen_available(void)
1132 {
1133 #ifdef CONFIG_XEN
1134     return 1;
1135 #else
1136     return 0;
1137 #endif
1138 }
1139
1140
1141 TargetInfo *qmp_query_target(Error **errp)
1142 {
1143     TargetInfo *info = g_malloc0(sizeof(*info));
1144
1145     info->arch = TARGET_TYPE;
1146
1147     return info;
1148 }