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_OPENRISC)
  89 #define QEMU_ARCH QEMU_ARCH_OPENRISC
  90 #elif defined(TARGET_PPC)
  91 #define QEMU_ARCH QEMU_ARCH_PPC
  92 #elif defined(TARGET_S390X)
  93 #define QEMU_ARCH QEMU_ARCH_S390X
  94 #elif defined(TARGET_SH4)
  95 #define QEMU_ARCH QEMU_ARCH_SH4
  96 #elif defined(TARGET_SPARC)
  97 #define QEMU_ARCH QEMU_ARCH_SPARC
  98 #elif defined(TARGET_XTENSA)
  99 #define QEMU_ARCH QEMU_ARCH_XTENSA
 100 #elif defined(TARGET_UNICORE32)
 101 #define QEMU_ARCH QEMU_ARCH_UNICORE32
 102 #endif
 103
 104 const uint32_t arch_type = QEMU_ARCH;
 105
 106 /***********************************************************/
 107 /* ram save/restore */
 108
 109 #define RAM_SAVE_FLAG_FULL     0x01 /* Obsolete, not used anymore */
 110 #define RAM_SAVE_FLAG_COMPRESS 0x02
 111 #define RAM_SAVE_FLAG_MEM_SIZE 0x04
 112 #define RAM_SAVE_FLAG_PAGE     0x08
 113 #define RAM_SAVE_FLAG_EOS      0x10
 114 #define RAM_SAVE_FLAG_CONTINUE 0x20
 115 #define RAM_SAVE_FLAG_XBZRLE   0x40
 116
 117 #ifdef __ALTIVEC__
 118 #include <altivec.h>
 119 #define VECTYPE        vector unsigned char
 120 #define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
 121 #define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
 122 /* altivec.h may redefine the bool macro as vector type.
 123  * Reset it to POSIX semantics. */
 124 #undef bool
 125 #define bool _Bool
 126 #elif defined __SSE2__
 127 #include <emmintrin.h>
 128 #define VECTYPE        __m128i
 129 #define SPLAT(p)       _mm_set1_epi8(*(p))
 130 #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
 131 #else
 132 #define VECTYPE        unsigned long
 133 #define SPLAT(p)       (*(p) * (~0UL / 255))
 134 #define ALL_EQ(v1, v2) ((v1) == (v2))
 135 #endif
 136
 137
 138 static struct defconfig_file {
 139     const char *filename;
 140     /* Indicates it is an user config file (disabled by -no-user-config) */
 141     bool userconfig;
 142 } default_config_files[] = {
 143     { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
 144     { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
 145     { NULL }, /* end of list */
 146 };
 147
 148
 149 int qemu_read_default_config_files(bool userconfig)
 150 {
 151     int ret;
 152     struct defconfig_file *f;
 153
 154     for (f = default_config_files; f->filename; f++) {
 155         if (!userconfig && f->userconfig) {
 156             continue;
 157         }
 158         ret = qemu_read_config_file(f->filename);
 159         if (ret < 0 && ret != -ENOENT) {
 160             return ret;
 161         }
 162     }
 163
 164     return 0;
 165 }
 166
 167 static int is_dup_page(uint8_t *page)
 168 {
 169     VECTYPE *p = (VECTYPE *)page;
 170     VECTYPE val = SPLAT(page);
 171     int i;
 172
 173     for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) {
 174         if (!ALL_EQ(val, p[i])) {
 175             return 0;
 176         }
 177     }
 178
 179     return 1;
 180 }
 181
 182 /* struct contains XBZRLE cache and a static page
 183    used by the compression */
 184 static struct {
 185     /* buffer used for XBZRLE encoding */
 186     uint8_t *encoded_buf;
 187     /* buffer for storing page content */
 188     uint8_t *current_buf;
 189     /* buffer used for XBZRLE decoding */
 190     uint8_t *decoded_buf;
 191     /* Cache for XBZRLE */
 192     PageCache *cache;
 193 } XBZRLE = {
 194     .encoded_buf = NULL,
 195     .current_buf = NULL,
 196     .decoded_buf = NULL,
 197     .cache = NULL,
 198 };
 199
 200
 201 int64_t xbzrle_cache_resize(int64_t new_size)
 202 {
 203     if (XBZRLE.cache != NULL) {
 204         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 205             TARGET_PAGE_SIZE;
 206     }
 207     return pow2floor(new_size);
 208 }
 209
 210 /* accounting for migration statistics */
 211 typedef struct AccountingInfo {
 212     uint64_t dup_pages;
 213     uint64_t norm_pages;
 214     uint64_t iterations;
 215     uint64_t xbzrle_bytes;
 216     uint64_t xbzrle_pages;
 217     uint64_t xbzrle_cache_miss;
 218     uint64_t xbzrle_overflows;
 219 } AccountingInfo;
 220
 221 static AccountingInfo acct_info;
 222
 223 static void acct_clear(void)
 224 {
 225     memset(&acct_info, 0, sizeof(acct_info));
 226 }
 227
 228 uint64_t dup_mig_bytes_transferred(void)
 229 {
 230     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 231 }
 232
 233 uint64_t dup_mig_pages_transferred(void)
 234 {
 235     return acct_info.dup_pages;
 236 }
 237
 238 uint64_t norm_mig_bytes_transferred(void)
 239 {
 240     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 241 }
 242
 243 uint64_t norm_mig_pages_transferred(void)
 244 {
 245     return acct_info.norm_pages;
 246 }
 247
 248 uint64_t xbzrle_mig_bytes_transferred(void)
 249 {
 250     return acct_info.xbzrle_bytes;
 251 }
 252
 253 uint64_t xbzrle_mig_pages_transferred(void)
 254 {
 255     return acct_info.xbzrle_pages;
 256 }
 257
 258 uint64_t xbzrle_mig_pages_cache_miss(void)
 259 {
 260     return acct_info.xbzrle_cache_miss;
 261 }
 262
 263 uint64_t xbzrle_mig_pages_overflow(void)
 264 {
 265     return acct_info.xbzrle_overflows;
 266 }
 267
 268 static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 269                              int cont, int flag)
 270 {
 271     size_t size;
 272
 273     qemu_put_be64(f, offset | cont | flag);
 274     size = 8;
 275
 276     if (!cont) {
 277         qemu_put_byte(f, strlen(block->idstr));
 278         qemu_put_buffer(f, (uint8_t *)block->idstr,
 279                         strlen(block->idstr));
 280         size += 1 + strlen(block->idstr);
 281     }
 282     return size;
 283 }
 284
 285 #define ENCODING_FLAG_XBZRLE 0x1
 286
 287 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 288                             ram_addr_t current_addr, RAMBlock *block,
 289                             ram_addr_t offset, int cont, bool last_stage)
 290 {
 291     int encoded_len = 0, bytes_sent = -1;
 292     uint8_t *prev_cached_page;
 293
 294     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 295         if (!last_stage) {
 296             cache_insert(XBZRLE.cache, current_addr, current_data);
 297         }
 298         acct_info.xbzrle_cache_miss++;
 299         return -1;
 300     }
 301
 302     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 303
 304     /* save current buffer into memory */
 305     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 306
 307     /* XBZRLE encoding (if there is no overflow) */
 308     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 309                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 310                                        TARGET_PAGE_SIZE);
 311     if (encoded_len == 0) {
 312         DPRINTF("Skipping unmodified page\n");
 313         return 0;
 314     } else if (encoded_len == -1) {
 315         DPRINTF("Overflow\n");
 316         acct_info.xbzrle_overflows++;
 317         /* update data in the cache */
 318         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 319         return -1;
 320     }
 321
 322     /* we need to update the data in the cache, in order to get the same data */
 323     if (!last_stage) {
 324         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 325     }
 326
 327     /* Send XBZRLE based compressed page */
 328     bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 329     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 330     qemu_put_be16(f, encoded_len);
 331     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 332     bytes_sent += encoded_len + 1 + 2;
 333     acct_info.xbzrle_pages++;
 334     acct_info.xbzrle_bytes += bytes_sent;
 335
 336     return bytes_sent;
 337 }
 338
 339
 340 /* This is the last block that we have visited serching for dirty pages
 341  */
 342 static RAMBlock *last_seen_block;
 343 /* This is the last block from where we have sent data */
 344 static RAMBlock *last_sent_block;
 345 static ram_addr_t last_offset;
 346 static unsigned long *migration_bitmap;
 347 static uint64_t migration_dirty_pages;
 348 static uint32_t last_version;
 349
 350 static inline
 351 ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
 352                                                  ram_addr_t start)
 353 {
 354     unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
 355     unsigned long nr = base + (start >> TARGET_PAGE_BITS);
 356     unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
 357
 358     unsigned long next = find_next_bit(migration_bitmap, size, nr);
 359
 360     if (next < size) {
 361         clear_bit(next, migration_bitmap);
 362         migration_dirty_pages--;
 363     }
 364     return (next - base) << TARGET_PAGE_BITS;
 365 }
 366
 367 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 368                                               ram_addr_t offset)
 369 {
 370     bool ret;
 371     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 372
 373     ret = test_and_set_bit(nr, migration_bitmap);
 374
 375     if (!ret) {
 376         migration_dirty_pages++;
 377     }
 378     return ret;
 379 }
 380
 381 /* Needs iothread lock! */
 382
 383 static void migration_bitmap_sync(void)
 384 {
 385     RAMBlock *block;
 386     ram_addr_t addr;
 387     uint64_t num_dirty_pages_init = migration_dirty_pages;
 388     MigrationState *s = migrate_get_current();
 389     static int64_t start_time;
 390     static int64_t num_dirty_pages_period;
 391     int64_t end_time;
 392
 393     if (!start_time) {
 394         start_time = qemu_get_clock_ms(rt_clock);
 395     }
 396
 397     trace_migration_bitmap_sync_start();
 398     memory_global_sync_dirty_bitmap(get_system_memory());
 399
 400     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 401         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 402             if (memory_region_test_and_clear_dirty(block->mr,
 403                                                    addr, TARGET_PAGE_SIZE,
 404                                                    DIRTY_MEMORY_MIGRATION)) {
 405                 migration_bitmap_set_dirty(block->mr, addr);
 406             }
 407         }
 408     }
 409     trace_migration_bitmap_sync_end(migration_dirty_pages
 410                                     - num_dirty_pages_init);
 411     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 412     end_time = qemu_get_clock_ms(rt_clock);
 413
 414     /* more than 1 second = 1000 millisecons */
 415     if (end_time > start_time + 1000) {
 416         s->dirty_pages_rate = num_dirty_pages_period * 1000
 417             / (end_time - start_time);
 418         s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
 419         start_time = end_time;
 420         num_dirty_pages_period = 0;
 421     }
 422 }
 423
 424 /*
 425  * ram_save_block: Writes a page of memory to the stream f
 426  *
 427  * Returns:  The number of bytes written.
 428  *           0 means no dirty pages
 429  */
 430
 431 static int ram_save_block(QEMUFile *f, bool last_stage)
 432 {
 433     RAMBlock *block = last_seen_block;
 434     ram_addr_t offset = last_offset;
 435     bool complete_round = false;
 436     int bytes_sent = 0;
 437     MemoryRegion *mr;
 438     ram_addr_t current_addr;
 439
 440     if (!block)
 441         block = QTAILQ_FIRST(&ram_list.blocks);
 442
 443     while (true) {
 444         mr = block->mr;
 445         offset = migration_bitmap_find_and_reset_dirty(mr, offset);
 446         if (complete_round && block == last_seen_block &&
 447             offset >= last_offset) {
 448             break;
 449         }
 450         if (offset >= block->length) {
 451             offset = 0;
 452             block = QTAILQ_NEXT(block, next);
 453             if (!block) {
 454                 block = QTAILQ_FIRST(&ram_list.blocks);
 455                 complete_round = true;
 456             }
 457         } else {
 458             uint8_t *p;
 459             int cont = (block == last_sent_block) ?
 460                 RAM_SAVE_FLAG_CONTINUE : 0;
 461
 462             p = memory_region_get_ram_ptr(mr) + offset;
 463
 464             /* In doubt sent page as normal */
 465             bytes_sent = -1;
 466             if (is_dup_page(p)) {
 467                 acct_info.dup_pages++;
 468                 bytes_sent = save_block_hdr(f, block, offset, cont,
 469                                             RAM_SAVE_FLAG_COMPRESS);
 470                 qemu_put_byte(f, *p);
 471                 bytes_sent += 1;
 472             } else if (migrate_use_xbzrle()) {
 473                 current_addr = block->offset + offset;
 474                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 475                                               offset, cont, last_stage);
 476                 if (!last_stage) {
 477                     p = get_cached_data(XBZRLE.cache, current_addr);
 478                 }
 479             }
 480
 481             /* XBZRLE overflow or normal page */
 482             if (bytes_sent == -1) {
 483                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 484                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 485                 bytes_sent += TARGET_PAGE_SIZE;
 486                 acct_info.norm_pages++;
 487             }
 488
 489             /* if page is unmodified, continue to the next */
 490             if (bytes_sent > 0) {
 491                 last_sent_block = block;
 492                 break;
 493             }
 494         }
 495     }
 496     last_seen_block = block;
 497     last_offset = offset;
 498
 499     return bytes_sent;
 500 }
 501
 502 static uint64_t bytes_transferred;
 503
 504 static ram_addr_t ram_save_remaining(void)
 505 {
 506     return migration_dirty_pages;
 507 }
 508
 509 uint64_t ram_bytes_remaining(void)
 510 {
 511     return ram_save_remaining() * TARGET_PAGE_SIZE;
 512 }
 513
 514 uint64_t ram_bytes_transferred(void)
 515 {
 516     return bytes_transferred;
 517 }
 518
 519 uint64_t ram_bytes_total(void)
 520 {
 521     RAMBlock *block;
 522     uint64_t total = 0;
 523
 524     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 525         total += block->length;
 526
 527     return total;
 528 }
 529
 530 static void migration_end(void)
 531 {
 532     if (migration_bitmap) {
 533         memory_global_dirty_log_stop();
 534         g_free(migration_bitmap);
 535         migration_bitmap = NULL;
 536     }
 537
 538     if (XBZRLE.cache) {
 539         cache_fini(XBZRLE.cache);
 540         g_free(XBZRLE.cache);
 541         g_free(XBZRLE.encoded_buf);
 542         g_free(XBZRLE.current_buf);
 543         g_free(XBZRLE.decoded_buf);
 544         XBZRLE.cache = NULL;
 545     }
 546 }
 547
 548 static void ram_migration_cancel(void *opaque)
 549 {
 550     migration_end();
 551 }
 552
 553 static void reset_ram_globals(void)
 554 {
 555     last_seen_block = NULL;
 556     last_sent_block = NULL;
 557     last_offset = 0;
 558     last_version = ram_list.version;
 559 }
 560
 561 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 562
 563 static int ram_save_setup(QEMUFile *f, void *opaque)
 564 {
 565     RAMBlock *block;
 566     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 567
 568     migration_bitmap = bitmap_new(ram_pages);
 569     bitmap_set(migration_bitmap, 0, ram_pages);
 570     migration_dirty_pages = ram_pages;
 571
 572     if (migrate_use_xbzrle()) {
 573         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 574                                   TARGET_PAGE_SIZE,
 575                                   TARGET_PAGE_SIZE);
 576         if (!XBZRLE.cache) {
 577             DPRINTF("Error creating cache\n");
 578             return -1;
 579         }
 580         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 581         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 582         acct_clear();
 583     }
 584
 585     qemu_mutex_lock_iothread();
 586     qemu_mutex_lock_ramlist();
 587     bytes_transferred = 0;
 588     reset_ram_globals();
 589
 590     memory_global_dirty_log_start();
 591     migration_bitmap_sync();
 592     qemu_mutex_unlock_iothread();
 593
 594     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 595
 596     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 597         qemu_put_byte(f, strlen(block->idstr));
 598         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 599         qemu_put_be64(f, block->length);
 600     }
 601
 602     qemu_mutex_unlock_ramlist();
 603     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 604
 605     return 0;
 606 }
 607
 608 static int ram_save_iterate(QEMUFile *f, void *opaque)
 609 {
 610     int ret;
 611     int i;
 612     int64_t t0;
 613     int total_sent = 0;
 614
 615     qemu_mutex_lock_ramlist();
 616
 617     if (ram_list.version != last_version) {
 618         reset_ram_globals();
 619     }
 620
 621     t0 = qemu_get_clock_ns(rt_clock);
 622     i = 0;
 623     while ((ret = qemu_file_rate_limit(f)) == 0) {
 624         int bytes_sent;
 625
 626         bytes_sent = ram_save_block(f, false);
 627         /* no more blocks to sent */
 628         if (bytes_sent == 0) {
 629             break;
 630         }
 631         total_sent += bytes_sent;
 632         acct_info.iterations++;
 633         /* we want to check in the 1st loop, just in case it was the 1st time
 634            and we had to sync the dirty bitmap.
 635            qemu_get_clock_ns() is a bit expensive, so we only check each some
 636            iterations
 637         */
 638         if ((i & 63) == 0) {
 639             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 640             if (t1 > MAX_WAIT) {
 641                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 642                         t1, i);
 643                 break;
 644             }
 645         }
 646         i++;
 647     }
 648
 649     qemu_mutex_unlock_ramlist();
 650
 651     if (ret < 0) {
 652         bytes_transferred += total_sent;
 653         return ret;
 654     }
 655
 656     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 657     total_sent += 8;
 658     bytes_transferred += total_sent;
 659
 660     return total_sent;
 661 }
 662
 663 static int ram_save_complete(QEMUFile *f, void *opaque)
 664 {
 665     qemu_mutex_lock_ramlist();
 666     migration_bitmap_sync();
 667
 668     /* try transferring iterative blocks of memory */
 669
 670     /* flush all remaining blocks regardless of rate limiting */
 671     while (true) {
 672         int bytes_sent;
 673
 674         bytes_sent = ram_save_block(f, true);
 675         /* no more blocks to sent */
 676         if (bytes_sent == 0) {
 677             break;
 678         }
 679         bytes_transferred += bytes_sent;
 680     }
 681     migration_end();
 682
 683     qemu_mutex_unlock_ramlist();
 684     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 685
 686     return 0;
 687 }
 688
 689 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 690 {
 691     uint64_t remaining_size;
 692
 693     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 694
 695     if (remaining_size < max_size) {
 696         qemu_mutex_lock_iothread();
 697         migration_bitmap_sync();
 698         qemu_mutex_unlock_iothread();
 699         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 700     }
 701     return remaining_size;
 702 }
 703
 704 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 705 {
 706     int ret, rc = 0;
 707     unsigned int xh_len;
 708     int xh_flags;
 709
 710     if (!XBZRLE.decoded_buf) {
 711         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 712     }
 713
 714     /* extract RLE header */
 715     xh_flags = qemu_get_byte(f);
 716     xh_len = qemu_get_be16(f);
 717
 718     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 719         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 720         return -1;
 721     }
 722
 723     if (xh_len > TARGET_PAGE_SIZE) {
 724         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 725         return -1;
 726     }
 727     /* load data and decode */
 728     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 729
 730     /* decode RLE */
 731     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 732                                TARGET_PAGE_SIZE);
 733     if (ret == -1) {
 734         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 735         rc = -1;
 736     } else  if (ret > TARGET_PAGE_SIZE) {
 737         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 738                 ret, TARGET_PAGE_SIZE);
 739         abort();
 740     }
 741
 742     return rc;
 743 }
 744
 745 static inline void *host_from_stream_offset(QEMUFile *f,
 746                                             ram_addr_t offset,
 747                                             int flags)
 748 {
 749     static RAMBlock *block = NULL;
 750     char id[256];
 751     uint8_t len;
 752
 753     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 754         if (!block) {
 755             fprintf(stderr, "Ack, bad migration stream!\n");
 756             return NULL;
 757         }
 758
 759         return memory_region_get_ram_ptr(block->mr) + offset;
 760     }
 761
 762     len = qemu_get_byte(f);
 763     qemu_get_buffer(f, (uint8_t *)id, len);
 764     id[len] = 0;
 765
 766     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 767         if (!strncmp(id, block->idstr, sizeof(id)))
 768             return memory_region_get_ram_ptr(block->mr) + offset;
 769     }
 770
 771     fprintf(stderr, "Can't find block %s!\n", id);
 772     return NULL;
 773 }
 774
 775 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 776 {
 777     ram_addr_t addr;
 778     int flags, ret = 0;
 779     int error;
 780     static uint64_t seq_iter;
 781
 782     seq_iter++;
 783
 784     if (version_id < 4 || version_id > 4) {
 785         return -EINVAL;
 786     }
 787
 788     do {
 789         addr = qemu_get_be64(f);
 790
 791         flags = addr & ~TARGET_PAGE_MASK;
 792         addr &= TARGET_PAGE_MASK;
 793
 794         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 795             if (version_id == 4) {
 796                 /* Synchronize RAM block list */
 797                 char id[256];
 798                 ram_addr_t length;
 799                 ram_addr_t total_ram_bytes = addr;
 800
 801                 while (total_ram_bytes) {
 802                     RAMBlock *block;
 803                     uint8_t len;
 804
 805                     len = qemu_get_byte(f);
 806                     qemu_get_buffer(f, (uint8_t *)id, len);
 807                     id[len] = 0;
 808                     length = qemu_get_be64(f);
 809
 810                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 811                         if (!strncmp(id, block->idstr, sizeof(id))) {
 812                             if (block->length != length) {
 813                                 ret =  -EINVAL;
 814                                 goto done;
 815                             }
 816                             break;
 817                         }
 818                     }
 819
 820                     if (!block) {
 821                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 822                                 "accept migration\n", id);
 823                         ret = -EINVAL;
 824                         goto done;
 825                     }
 826
 827                     total_ram_bytes -= length;
 828                 }
 829             }
 830         }
 831
 832         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 833             void *host;
 834             uint8_t ch;
 835
 836             host = host_from_stream_offset(f, addr, flags);
 837             if (!host) {
 838                 return -EINVAL;
 839             }
 840
 841             ch = qemu_get_byte(f);
 842             memset(host, ch, TARGET_PAGE_SIZE);
 843 #ifndef _WIN32
 844             if (ch == 0 &&
 845                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 846                 getpagesize() <= TARGET_PAGE_SIZE) {
 847                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 848             }
 849 #endif
 850         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 851             void *host;
 852
 853             host = host_from_stream_offset(f, addr, flags);
 854             if (!host) {
 855                 return -EINVAL;
 856             }
 857
 858             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 859         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 860             void *host = host_from_stream_offset(f, addr, flags);
 861             if (!host) {
 862                 return -EINVAL;
 863             }
 864
 865             if (load_xbzrle(f, addr, host) < 0) {
 866                 ret = -EINVAL;
 867                 goto done;
 868             }
 869         }
 870         error = qemu_file_get_error(f);
 871         if (error) {
 872             ret = error;
 873             goto done;
 874         }
 875     } while (!(flags & RAM_SAVE_FLAG_EOS));
 876
 877 done:
 878     DPRINTF("Completed load of VM with exit code %d seq iteration "
 879             "%" PRIu64 "\n", ret, seq_iter);
 880     return ret;
 881 }
 882
 883 SaveVMHandlers savevm_ram_handlers = {
 884     .save_live_setup = ram_save_setup,
 885     .save_live_iterate = ram_save_iterate,
 886     .save_live_complete = ram_save_complete,
 887     .save_live_pending = ram_save_pending,
 888     .load_state = ram_load,
 889     .cancel = ram_migration_cancel,
 890 };
 891
 892 #ifdef HAS_AUDIO
 893 struct soundhw {
 894     const char *name;
 895     const char *descr;
 896     int enabled;
 897     int isa;
 898     union {
 899         int (*init_isa) (ISABus *bus);
 900         int (*init_pci) (PCIBus *bus);
 901     } init;
 902 };
 903
 904 static struct soundhw soundhw[] = {
 905 #ifdef HAS_AUDIO_CHOICE
 906 #ifdef CONFIG_PCSPK
 907     {
 908         "pcspk",
 909         "PC speaker",
 910         0,
 911         1,
 912         { .init_isa = pcspk_audio_init }
 913     },
 914 #endif
 915
 916 #ifdef CONFIG_SB16
 917     {
 918         "sb16",
 919         "Creative Sound Blaster 16",
 920         0,
 921         1,
 922         { .init_isa = SB16_init }
 923     },
 924 #endif
 925
 926 #ifdef CONFIG_CS4231A
 927     {
 928         "cs4231a",
 929         "CS4231A",
 930         0,
 931         1,
 932         { .init_isa = cs4231a_init }
 933     },
 934 #endif
 935
 936 #ifdef CONFIG_ADLIB
 937     {
 938         "adlib",
 939 #ifdef HAS_YMF262
 940         "Yamaha YMF262 (OPL3)",
 941 #else
 942         "Yamaha YM3812 (OPL2)",
 943 #endif
 944         0,
 945         1,
 946         { .init_isa = Adlib_init }
 947     },
 948 #endif
 949
 950 #ifdef CONFIG_GUS
 951     {
 952         "gus",
 953         "Gravis Ultrasound GF1",
 954         0,
 955         1,
 956         { .init_isa = GUS_init }
 957     },
 958 #endif
 959
 960 #ifdef CONFIG_AC97
 961     {
 962         "ac97",
 963         "Intel 82801AA AC97 Audio",
 964         0,
 965         0,
 966         { .init_pci = ac97_init }
 967     },
 968 #endif
 969
 970 #ifdef CONFIG_ES1370
 971     {
 972         "es1370",
 973         "ENSONIQ AudioPCI ES1370",
 974         0,
 975         0,
 976         { .init_pci = es1370_init }
 977     },
 978 #endif
 979
 980 #ifdef CONFIG_HDA
 981     {
 982         "hda",
 983         "Intel HD Audio",
 984         0,
 985         0,
 986         { .init_pci = intel_hda_and_codec_init }
 987     },
 988 #endif
 989
 990 #endif /* HAS_AUDIO_CHOICE */
 991
 992     { NULL, NULL, 0, 0, { NULL } }
 993 };
 994
 995 void select_soundhw(const char *optarg)
 996 {
 997     struct soundhw *c;
 998
 999     if (is_help_option(optarg)) {
1000     show_valid_cards:
1001
1002 #ifdef HAS_AUDIO_CHOICE
1003         printf("Valid sound card names (comma separated):\n");
1004         for (c = soundhw; c->name; ++c) {
1005             printf ("%-11s %s\n", c->name, c->descr);
1006         }
1007         printf("\n-soundhw all will enable all of the above\n");
1008 #else
1009         printf("Machine has no user-selectable audio hardware "
1010                "(it may or may not have always-present audio hardware).\n");
1011 #endif
1012         exit(!is_help_option(optarg));
1013     }
1014     else {
1015         size_t l;
1016         const char *p;
1017         char *e;
1018         int bad_card = 0;
1019
1020         if (!strcmp(optarg, "all")) {
1021             for (c = soundhw; c->name; ++c) {
1022                 c->enabled = 1;
1023             }
1024             return;
1025         }
1026
1027         p = optarg;
1028         while (*p) {
1029             e = strchr(p, ',');
1030             l = !e ? strlen(p) : (size_t) (e - p);
1031
1032             for (c = soundhw; c->name; ++c) {
1033                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1034                     c->enabled = 1;
1035                     break;
1036                 }
1037             }
1038
1039             if (!c->name) {
1040                 if (l > 80) {
1041                     fprintf(stderr,
1042                             "Unknown sound card name (too big to show)\n");
1043                 }
1044                 else {
1045                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1046                             (int) l, p);
1047                 }
1048                 bad_card = 1;
1049             }
1050             p += l + (e != NULL);
1051         }
1052
1053         if (bad_card) {
1054             goto show_valid_cards;
1055         }
1056     }
1057 }
1058
1059 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1060 {
1061     struct soundhw *c;
1062
1063     for (c = soundhw; c->name; ++c) {
1064         if (c->enabled) {
1065             if (c->isa) {
1066                 if (isa_bus) {
1067                     c->init.init_isa(isa_bus);
1068                 }
1069             } else {
1070                 if (pci_bus) {
1071                     c->init.init_pci(pci_bus);
1072                 }
1073             }
1074         }
1075     }
1076 }
1077 #else
1078 void select_soundhw(const char *optarg)
1079 {
1080 }
1081 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1082 {
1083 }
1084 #endif
1085
1086 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1087 {
1088     int ret;
1089
1090     if (strlen(str) != 36) {
1091         return -1;
1092     }
1093
1094     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1095                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1096                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1097                  &uuid[15]);
1098
1099     if (ret != 16) {
1100         return -1;
1101     }
1102 #ifdef TARGET_I386
1103     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1104 #endif
1105     return 0;
1106 }
1107
1108 void do_acpitable_option(const char *optarg)
1109 {
1110 #ifdef TARGET_I386
1111     if (acpi_table_add(optarg) < 0) {
1112         fprintf(stderr, "Wrong acpi table provided\n");
1113         exit(1);
1114     }
1115 #endif
1116 }
1117
1118 void do_smbios_option(const char *optarg)
1119 {
1120 #ifdef TARGET_I386
1121     if (smbios_entry_add(optarg) < 0) {
1122         fprintf(stderr, "Wrong smbios provided\n");
1123         exit(1);
1124     }
1125 #endif
1126 }
1127
1128 void cpudef_init(void)
1129 {
1130 #if defined(cpudef_setup)
1131     cpudef_setup(); /* parse cpu definitions in target config file */
1132 #endif
1133 }
1134
1135 int audio_available(void)
1136 {
1137 #ifdef HAS_AUDIO
1138     return 1;
1139 #else
1140     return 0;
1141 #endif
1142 }
1143
1144 int tcg_available(void)
1145 {
1146     return 1;
1147 }
1148
1149 int kvm_available(void)
1150 {
1151 #ifdef CONFIG_KVM
1152     return 1;
1153 #else
1154     return 0;
1155 #endif
1156 }
1157
1158 int xen_available(void)
1159 {
1160 #ifdef CONFIG_XEN
1161     return 1;
1162 #else
1163     return 0;
1164 #endif
1165 }
1166
1167
1168 TargetInfo *qmp_query_target(Error **errp)
1169 {
1170     TargetInfo *info = g_malloc0(sizeof(*info));
1171
1172     info->arch = TARGET_TYPE;
1173
1174     return info;
1175 }