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