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 static RAMBlock *last_block;
 336 static ram_addr_t last_offset;
 337 static unsigned long *migration_bitmap;
 338 static uint64_t migration_dirty_pages;
 339
 340 static inline bool migration_bitmap_test_and_reset_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_clear_bit(nr, migration_bitmap);
 347
 348     if (ret) {
 349         migration_dirty_pages--;
 350     }
 351     return ret;
 352 }
 353
 354 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 355                                               ram_addr_t offset)
 356 {
 357     bool ret;
 358     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 359
 360     ret = test_and_set_bit(nr, migration_bitmap);
 361
 362     if (!ret) {
 363         migration_dirty_pages++;
 364     }
 365     return ret;
 366 }
 367
 368 static void migration_bitmap_sync(void)
 369 {
 370     RAMBlock *block;
 371     ram_addr_t addr;
 372     uint64_t num_dirty_pages_init = migration_dirty_pages;
 373     MigrationState *s = migrate_get_current();
 374     static int64_t start_time;
 375     static int64_t num_dirty_pages_period;
 376     int64_t end_time;
 377
 378     if (!start_time) {
 379         start_time = qemu_get_clock_ms(rt_clock);
 380     }
 381
 382     trace_migration_bitmap_sync_start();
 383     memory_global_sync_dirty_bitmap(get_system_memory());
 384
 385     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 386         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 387             if (memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE,
 388                                         DIRTY_MEMORY_MIGRATION)) {
 389                 migration_bitmap_set_dirty(block->mr, addr);
 390             }
 391         }
 392         memory_region_reset_dirty(block->mr, 0, block->length,
 393                                   DIRTY_MEMORY_MIGRATION);
 394     }
 395     trace_migration_bitmap_sync_end(migration_dirty_pages
 396                                     - num_dirty_pages_init);
 397     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 398     end_time = qemu_get_clock_ms(rt_clock);
 399
 400     /* more than 1 second = 1000 millisecons */
 401     if (end_time > start_time + 1000) {
 402         s->dirty_pages_rate = num_dirty_pages_period * 1000
 403             / (end_time - start_time);
 404         start_time = end_time;
 405         num_dirty_pages_period = 0;
 406     }
 407 }
 408
 409
 410 /*
 411  * ram_save_block: Writes a page of memory to the stream f
 412  *
 413  * Returns:  0: if the page hasn't changed
 414  *          -1: if there are no more dirty pages
 415  *           n: the amount of bytes written in other case
 416  */
 417
 418 static int ram_save_block(QEMUFile *f, bool last_stage)
 419 {
 420     RAMBlock *block = last_block;
 421     ram_addr_t offset = last_offset;
 422     int bytes_sent = -1;
 423     MemoryRegion *mr;
 424     ram_addr_t current_addr;
 425
 426     if (!block)
 427         block = QTAILQ_FIRST(&ram_list.blocks);
 428
 429     do {
 430         mr = block->mr;
 431         if (migration_bitmap_test_and_reset_dirty(mr, offset)) {
 432             uint8_t *p;
 433             int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
 434
 435             p = memory_region_get_ram_ptr(mr) + offset;
 436
 437             if (is_dup_page(p)) {
 438                 acct_info.dup_pages++;
 439                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_COMPRESS);
 440                 qemu_put_byte(f, *p);
 441                 bytes_sent = 1;
 442             } else if (migrate_use_xbzrle()) {
 443                 current_addr = block->offset + offset;
 444                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 445                                               offset, cont, last_stage);
 446                 if (!last_stage) {
 447                     p = get_cached_data(XBZRLE.cache, current_addr);
 448                 }
 449             }
 450
 451             /* either we didn't send yet (we may have had XBZRLE overflow) */
 452             if (bytes_sent == -1) {
 453                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 454                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 455                 bytes_sent = TARGET_PAGE_SIZE;
 456                 acct_info.norm_pages++;
 457             }
 458
 459             /* if page is unmodified, continue to the next */
 460             if (bytes_sent != 0) {
 461                 break;
 462             }
 463         }
 464
 465         offset += TARGET_PAGE_SIZE;
 466         if (offset >= block->length) {
 467             offset = 0;
 468             block = QTAILQ_NEXT(block, next);
 469             if (!block)
 470                 block = QTAILQ_FIRST(&ram_list.blocks);
 471         }
 472     } while (block != last_block || offset != last_offset);
 473
 474     last_block = block;
 475     last_offset = offset;
 476
 477     return bytes_sent;
 478 }
 479
 480 static uint64_t bytes_transferred;
 481
 482 static ram_addr_t ram_save_remaining(void)
 483 {
 484     return migration_dirty_pages;
 485 }
 486
 487 uint64_t ram_bytes_remaining(void)
 488 {
 489     return ram_save_remaining() * TARGET_PAGE_SIZE;
 490 }
 491
 492 uint64_t ram_bytes_transferred(void)
 493 {
 494     return bytes_transferred;
 495 }
 496
 497 uint64_t ram_bytes_total(void)
 498 {
 499     RAMBlock *block;
 500     uint64_t total = 0;
 501
 502     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 503         total += block->length;
 504
 505     return total;
 506 }
 507
 508 static void migration_end(void)
 509 {
 510     if (migration_bitmap) {
 511         memory_global_dirty_log_stop();
 512         g_free(migration_bitmap);
 513         migration_bitmap = NULL;
 514     }
 515
 516     if (XBZRLE.cache) {
 517         cache_fini(XBZRLE.cache);
 518         g_free(XBZRLE.cache);
 519         g_free(XBZRLE.encoded_buf);
 520         g_free(XBZRLE.current_buf);
 521         g_free(XBZRLE.decoded_buf);
 522         XBZRLE.cache = NULL;
 523     }
 524 }
 525
 526 static void ram_migration_cancel(void *opaque)
 527 {
 528     migration_end();
 529 }
 530
 531
 532 static void reset_ram_globals(void)
 533 {
 534     last_block = NULL;
 535     last_offset = 0;
 536 }
 537
 538 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 539
 540 static int ram_save_setup(QEMUFile *f, void *opaque)
 541 {
 542     RAMBlock *block;
 543     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 544
 545     migration_bitmap = bitmap_new(ram_pages);
 546     bitmap_set(migration_bitmap, 0, ram_pages);
 547     migration_dirty_pages = ram_pages;
 548
 549     bytes_transferred = 0;
 550     reset_ram_globals();
 551
 552     if (migrate_use_xbzrle()) {
 553         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 554                                   TARGET_PAGE_SIZE,
 555                                   TARGET_PAGE_SIZE);
 556         if (!XBZRLE.cache) {
 557             DPRINTF("Error creating cache\n");
 558             return -1;
 559         }
 560         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 561         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 562         acct_clear();
 563     }
 564
 565     memory_global_dirty_log_start();
 566     migration_bitmap_sync();
 567
 568     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 569
 570     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 571         qemu_put_byte(f, strlen(block->idstr));
 572         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 573         qemu_put_be64(f, block->length);
 574     }
 575
 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     uint64_t bytes_transferred_last;
 584     double bwidth = 0;
 585     int ret;
 586     int i;
 587     uint64_t expected_downtime;
 588     MigrationState *s = migrate_get_current();
 589
 590     bytes_transferred_last = bytes_transferred;
 591     bwidth = qemu_get_clock_ns(rt_clock);
 592
 593     i = 0;
 594     while ((ret = qemu_file_rate_limit(f)) == 0) {
 595         int bytes_sent;
 596
 597         bytes_sent = ram_save_block(f, false);
 598         /* no more blocks to sent */
 599         if (bytes_sent < 0) {
 600             break;
 601         }
 602         bytes_transferred += bytes_sent;
 603         acct_info.iterations++;
 604         /* we want to check in the 1st loop, just in case it was the 1st time
 605            and we had to sync the dirty bitmap.
 606            qemu_get_clock_ns() is a bit expensive, so we only check each some
 607            iterations
 608         */
 609         if ((i & 63) == 0) {
 610             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - bwidth) / 1000000;
 611             if (t1 > MAX_WAIT) {
 612                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 613                         t1, i);
 614                 break;
 615             }
 616         }
 617         i++;
 618     }
 619
 620     if (ret < 0) {
 621         return ret;
 622     }
 623
 624     bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
 625     bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
 626
 627     /* if we haven't transferred anything this round, force
 628      * expected_downtime to a very high value, but without
 629      * crashing */
 630     if (bwidth == 0) {
 631         bwidth = 0.000001;
 632     }
 633
 634     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 635
 636     expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 637     DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(" PRIu64 ")?\n",
 638             expected_downtime, migrate_max_downtime());
 639
 640     if (expected_downtime <= migrate_max_downtime()) {
 641         migration_bitmap_sync();
 642         expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 643         s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */
 644
 645         return expected_downtime <= migrate_max_downtime();
 646     }
 647     return 0;
 648 }
 649
 650 static int ram_save_complete(QEMUFile *f, void *opaque)
 651 {
 652     migration_bitmap_sync();
 653
 654     /* try transferring iterative blocks of memory */
 655
 656     /* flush all remaining blocks regardless of rate limiting */
 657     while (true) {
 658         int bytes_sent;
 659
 660         bytes_sent = ram_save_block(f, true);
 661         /* no more blocks to sent */
 662         if (bytes_sent < 0) {
 663             break;
 664         }
 665         bytes_transferred += bytes_sent;
 666     }
 667     migration_end();
 668
 669     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 670
 671     return 0;
 672 }
 673
 674 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 675 {
 676     int ret, rc = 0;
 677     unsigned int xh_len;
 678     int xh_flags;
 679
 680     if (!XBZRLE.decoded_buf) {
 681         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 682     }
 683
 684     /* extract RLE header */
 685     xh_flags = qemu_get_byte(f);
 686     xh_len = qemu_get_be16(f);
 687
 688     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 689         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 690         return -1;
 691     }
 692
 693     if (xh_len > TARGET_PAGE_SIZE) {
 694         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 695         return -1;
 696     }
 697     /* load data and decode */
 698     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 699
 700     /* decode RLE */
 701     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 702                                TARGET_PAGE_SIZE);
 703     if (ret == -1) {
 704         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 705         rc = -1;
 706     } else  if (ret > TARGET_PAGE_SIZE) {
 707         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 708                 ret, TARGET_PAGE_SIZE);
 709         abort();
 710     }
 711
 712     return rc;
 713 }
 714
 715 static inline void *host_from_stream_offset(QEMUFile *f,
 716                                             ram_addr_t offset,
 717                                             int flags)
 718 {
 719     static RAMBlock *block = NULL;
 720     char id[256];
 721     uint8_t len;
 722
 723     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 724         if (!block) {
 725             fprintf(stderr, "Ack, bad migration stream!\n");
 726             return NULL;
 727         }
 728
 729         return memory_region_get_ram_ptr(block->mr) + offset;
 730     }
 731
 732     len = qemu_get_byte(f);
 733     qemu_get_buffer(f, (uint8_t *)id, len);
 734     id[len] = 0;
 735
 736     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 737         if (!strncmp(id, block->idstr, sizeof(id)))
 738             return memory_region_get_ram_ptr(block->mr) + offset;
 739     }
 740
 741     fprintf(stderr, "Can't find block %s!\n", id);
 742     return NULL;
 743 }
 744
 745 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 746 {
 747     ram_addr_t addr;
 748     int flags, ret = 0;
 749     int error;
 750     static uint64_t seq_iter;
 751
 752     seq_iter++;
 753
 754     if (version_id < 4 || version_id > 4) {
 755         return -EINVAL;
 756     }
 757
 758     do {
 759         addr = qemu_get_be64(f);
 760
 761         flags = addr & ~TARGET_PAGE_MASK;
 762         addr &= TARGET_PAGE_MASK;
 763
 764         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 765             if (version_id == 4) {
 766                 /* Synchronize RAM block list */
 767                 char id[256];
 768                 ram_addr_t length;
 769                 ram_addr_t total_ram_bytes = addr;
 770
 771                 while (total_ram_bytes) {
 772                     RAMBlock *block;
 773                     uint8_t len;
 774
 775                     len = qemu_get_byte(f);
 776                     qemu_get_buffer(f, (uint8_t *)id, len);
 777                     id[len] = 0;
 778                     length = qemu_get_be64(f);
 779
 780                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 781                         if (!strncmp(id, block->idstr, sizeof(id))) {
 782                             if (block->length != length) {
 783                                 ret =  -EINVAL;
 784                                 goto done;
 785                             }
 786                             break;
 787                         }
 788                     }
 789
 790                     if (!block) {
 791                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 792                                 "accept migration\n", id);
 793                         ret = -EINVAL;
 794                         goto done;
 795                     }
 796
 797                     total_ram_bytes -= length;
 798                 }
 799             }
 800         }
 801
 802         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 803             void *host;
 804             uint8_t ch;
 805
 806             host = host_from_stream_offset(f, addr, flags);
 807             if (!host) {
 808                 return -EINVAL;
 809             }
 810
 811             ch = qemu_get_byte(f);
 812             memset(host, ch, TARGET_PAGE_SIZE);
 813 #ifndef _WIN32
 814             if (ch == 0 &&
 815                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 816                 getpagesize() <= TARGET_PAGE_SIZE) {
 817                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 818             }
 819 #endif
 820         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 821             void *host;
 822
 823             host = host_from_stream_offset(f, addr, flags);
 824             if (!host) {
 825                 return -EINVAL;
 826             }
 827
 828             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 829         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 830             if (!migrate_use_xbzrle()) {
 831                 return -EINVAL;
 832             }
 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     .load_state = ram_load,
 861     .cancel = ram_migration_cancel,
 862 };
 863
 864 #ifdef HAS_AUDIO
 865 struct soundhw {
 866     const char *name;
 867     const char *descr;
 868     int enabled;
 869     int isa;
 870     union {
 871         int (*init_isa) (ISABus *bus);
 872         int (*init_pci) (PCIBus *bus);
 873     } init;
 874 };
 875
 876 static struct soundhw soundhw[] = {
 877 #ifdef HAS_AUDIO_CHOICE
 878 #ifdef CONFIG_PCSPK
 879     {
 880         "pcspk",
 881         "PC speaker",
 882         0,
 883         1,
 884         { .init_isa = pcspk_audio_init }
 885     },
 886 #endif
 887
 888 #ifdef CONFIG_SB16
 889     {
 890         "sb16",
 891         "Creative Sound Blaster 16",
 892         0,
 893         1,
 894         { .init_isa = SB16_init }
 895     },
 896 #endif
 897
 898 #ifdef CONFIG_CS4231A
 899     {
 900         "cs4231a",
 901         "CS4231A",
 902         0,
 903         1,
 904         { .init_isa = cs4231a_init }
 905     },
 906 #endif
 907
 908 #ifdef CONFIG_ADLIB
 909     {
 910         "adlib",
 911 #ifdef HAS_YMF262
 912         "Yamaha YMF262 (OPL3)",
 913 #else
 914         "Yamaha YM3812 (OPL2)",
 915 #endif
 916         0,
 917         1,
 918         { .init_isa = Adlib_init }
 919     },
 920 #endif
 921
 922 #ifdef CONFIG_GUS
 923     {
 924         "gus",
 925         "Gravis Ultrasound GF1",
 926         0,
 927         1,
 928         { .init_isa = GUS_init }
 929     },
 930 #endif
 931
 932 #ifdef CONFIG_AC97
 933     {
 934         "ac97",
 935         "Intel 82801AA AC97 Audio",
 936         0,
 937         0,
 938         { .init_pci = ac97_init }
 939     },
 940 #endif
 941
 942 #ifdef CONFIG_ES1370
 943     {
 944         "es1370",
 945         "ENSONIQ AudioPCI ES1370",
 946         0,
 947         0,
 948         { .init_pci = es1370_init }
 949     },
 950 #endif
 951
 952 #ifdef CONFIG_HDA
 953     {
 954         "hda",
 955         "Intel HD Audio",
 956         0,
 957         0,
 958         { .init_pci = intel_hda_and_codec_init }
 959     },
 960 #endif
 961
 962 #endif /* HAS_AUDIO_CHOICE */
 963
 964     { NULL, NULL, 0, 0, { NULL } }
 965 };
 966
 967 void select_soundhw(const char *optarg)
 968 {
 969     struct soundhw *c;
 970
 971     if (is_help_option(optarg)) {
 972     show_valid_cards:
 973
 974 #ifdef HAS_AUDIO_CHOICE
 975         printf("Valid sound card names (comma separated):\n");
 976         for (c = soundhw; c->name; ++c) {
 977             printf ("%-11s %s\n", c->name, c->descr);
 978         }
 979         printf("\n-soundhw all will enable all of the above\n");
 980 #else
 981         printf("Machine has no user-selectable audio hardware "
 982                "(it may or may not have always-present audio hardware).\n");
 983 #endif
 984         exit(!is_help_option(optarg));
 985     }
 986     else {
 987         size_t l;
 988         const char *p;
 989         char *e;
 990         int bad_card = 0;
 991
 992         if (!strcmp(optarg, "all")) {
 993             for (c = soundhw; c->name; ++c) {
 994                 c->enabled = 1;
 995             }
 996             return;
 997         }
 998
 999         p = optarg;
1000         while (*p) {
1001             e = strchr(p, ',');
1002             l = !e ? strlen(p) : (size_t) (e - p);
1003
1004             for (c = soundhw; c->name; ++c) {
1005                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1006                     c->enabled = 1;
1007                     break;
1008                 }
1009             }
1010
1011             if (!c->name) {
1012                 if (l > 80) {
1013                     fprintf(stderr,
1014                             "Unknown sound card name (too big to show)\n");
1015                 }
1016                 else {
1017                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1018                             (int) l, p);
1019                 }
1020                 bad_card = 1;
1021             }
1022             p += l + (e != NULL);
1023         }
1024
1025         if (bad_card) {
1026             goto show_valid_cards;
1027         }
1028     }
1029 }
1030
1031 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1032 {
1033     struct soundhw *c;
1034
1035     for (c = soundhw; c->name; ++c) {
1036         if (c->enabled) {
1037             if (c->isa) {
1038                 if (isa_bus) {
1039                     c->init.init_isa(isa_bus);
1040                 }
1041             } else {
1042                 if (pci_bus) {
1043                     c->init.init_pci(pci_bus);
1044                 }
1045             }
1046         }
1047     }
1048 }
1049 #else
1050 void select_soundhw(const char *optarg)
1051 {
1052 }
1053 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1054 {
1055 }
1056 #endif
1057
1058 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1059 {
1060     int ret;
1061
1062     if (strlen(str) != 36) {
1063         return -1;
1064     }
1065
1066     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1067                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1068                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1069                  &uuid[15]);
1070
1071     if (ret != 16) {
1072         return -1;
1073     }
1074 #ifdef TARGET_I386
1075     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1076 #endif
1077     return 0;
1078 }
1079
1080 void do_acpitable_option(const char *optarg)
1081 {
1082 #ifdef TARGET_I386
1083     if (acpi_table_add(optarg) < 0) {
1084         fprintf(stderr, "Wrong acpi table provided\n");
1085         exit(1);
1086     }
1087 #endif
1088 }
1089
1090 void do_smbios_option(const char *optarg)
1091 {
1092 #ifdef TARGET_I386
1093     if (smbios_entry_add(optarg) < 0) {
1094         fprintf(stderr, "Wrong smbios provided\n");
1095         exit(1);
1096     }
1097 #endif
1098 }
1099
1100 void cpudef_init(void)
1101 {
1102 #if defined(cpudef_setup)
1103     cpudef_setup(); /* parse cpu definitions in target config file */
1104 #endif
1105 }
1106
1107 int audio_available(void)
1108 {
1109 #ifdef HAS_AUDIO
1110     return 1;
1111 #else
1112     return 0;
1113 #endif
1114 }
1115
1116 int tcg_available(void)
1117 {
1118     return 1;
1119 }
1120
1121 int kvm_available(void)
1122 {
1123 #ifdef CONFIG_KVM
1124     return 1;
1125 #else
1126     return 0;
1127 #endif
1128 }
1129
1130 int xen_available(void)
1131 {
1132 #ifdef CONFIG_XEN
1133     return 1;
1134 #else
1135     return 0;
1136 #endif
1137 }
1138
1139
1140 TargetInfo *qmp_query_target(Error **errp)
1141 {
1142     TargetInfo *info = g_malloc0(sizeof(*info));
1143
1144     info->arch = TARGET_TYPE;
1145
1146     return info;
1147 }