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 static uint32_t last_version;
 340
 341 static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr,
 342                                                          ram_addr_t offset)
 343 {
 344     bool ret;
 345     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 346
 347     ret = test_and_clear_bit(nr, migration_bitmap);
 348
 349     if (ret) {
 350         migration_dirty_pages--;
 351     }
 352     return ret;
 353 }
 354
 355 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 356                                               ram_addr_t offset)
 357 {
 358     bool ret;
 359     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 360
 361     ret = test_and_set_bit(nr, migration_bitmap);
 362
 363     if (!ret) {
 364         migration_dirty_pages++;
 365     }
 366     return ret;
 367 }
 368
 369 static void migration_bitmap_sync(void)
 370 {
 371     RAMBlock *block;
 372     ram_addr_t addr;
 373     uint64_t num_dirty_pages_init = migration_dirty_pages;
 374     MigrationState *s = migrate_get_current();
 375     static int64_t start_time;
 376     static int64_t num_dirty_pages_period;
 377     int64_t end_time;
 378
 379     if (!start_time) {
 380         start_time = qemu_get_clock_ms(rt_clock);
 381     }
 382
 383     trace_migration_bitmap_sync_start();
 384     memory_global_sync_dirty_bitmap(get_system_memory());
 385
 386     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 387         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 388             if (memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE,
 389                                         DIRTY_MEMORY_MIGRATION)) {
 390                 migration_bitmap_set_dirty(block->mr, addr);
 391             }
 392         }
 393         memory_region_reset_dirty(block->mr, 0, block->length,
 394                                   DIRTY_MEMORY_MIGRATION);
 395     }
 396     trace_migration_bitmap_sync_end(migration_dirty_pages
 397                                     - num_dirty_pages_init);
 398     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 399     end_time = qemu_get_clock_ms(rt_clock);
 400
 401     /* more than 1 second = 1000 millisecons */
 402     if (end_time > start_time + 1000) {
 403         s->dirty_pages_rate = num_dirty_pages_period * 1000
 404             / (end_time - start_time);
 405         start_time = end_time;
 406         num_dirty_pages_period = 0;
 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 static void reset_ram_globals(void)
 532 {
 533     last_block = NULL;
 534     last_offset = 0;
 535     last_version = ram_list.version;
 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     qemu_mutex_lock_ramlist();
 550     bytes_transferred = 0;
 551     reset_ram_globals();
 552
 553     if (migrate_use_xbzrle()) {
 554         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 555                                   TARGET_PAGE_SIZE,
 556                                   TARGET_PAGE_SIZE);
 557         if (!XBZRLE.cache) {
 558             DPRINTF("Error creating cache\n");
 559             return -1;
 560         }
 561         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 562         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 563         acct_clear();
 564     }
 565
 566     memory_global_dirty_log_start();
 567     migration_bitmap_sync();
 568
 569     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 570
 571     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 572         qemu_put_byte(f, strlen(block->idstr));
 573         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 574         qemu_put_be64(f, block->length);
 575     }
 576
 577     qemu_mutex_unlock_ramlist();
 578     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 579
 580     return 0;
 581 }
 582
 583 static int ram_save_iterate(QEMUFile *f, void *opaque)
 584 {
 585     uint64_t bytes_transferred_last;
 586     double bwidth = 0;
 587     int ret;
 588     int i;
 589     uint64_t expected_downtime;
 590     MigrationState *s = migrate_get_current();
 591
 592     qemu_mutex_lock_ramlist();
 593
 594     if (ram_list.version != last_version) {
 595         reset_ram_globals();
 596     }
 597
 598     bytes_transferred_last = bytes_transferred;
 599     bwidth = qemu_get_clock_ns(rt_clock);
 600
 601     i = 0;
 602     while ((ret = qemu_file_rate_limit(f)) == 0) {
 603         int bytes_sent;
 604
 605         bytes_sent = ram_save_block(f, false);
 606         /* no more blocks to sent */
 607         if (bytes_sent < 0) {
 608             break;
 609         }
 610         bytes_transferred += bytes_sent;
 611         acct_info.iterations++;
 612         /* we want to check in the 1st loop, just in case it was the 1st time
 613            and we had to sync the dirty bitmap.
 614            qemu_get_clock_ns() is a bit expensive, so we only check each some
 615            iterations
 616         */
 617         if ((i & 63) == 0) {
 618             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - bwidth) / 1000000;
 619             if (t1 > MAX_WAIT) {
 620                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 621                         t1, i);
 622                 break;
 623             }
 624         }
 625         i++;
 626     }
 627
 628     if (ret < 0) {
 629         return ret;
 630     }
 631
 632     bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
 633     bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
 634
 635     /* if we haven't transferred anything this round, force
 636      * expected_downtime to a very high value, but without
 637      * crashing */
 638     if (bwidth == 0) {
 639         bwidth = 0.000001;
 640     }
 641
 642     qemu_mutex_unlock_ramlist();
 643     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 644
 645     expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 646     DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(" PRIu64 ")?\n",
 647             expected_downtime, migrate_max_downtime());
 648
 649     if (expected_downtime <= migrate_max_downtime()) {
 650         migration_bitmap_sync();
 651         expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 652         s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */
 653
 654         return expected_downtime <= migrate_max_downtime();
 655     }
 656     return 0;
 657 }
 658
 659 static int ram_save_complete(QEMUFile *f, void *opaque)
 660 {
 661     migration_bitmap_sync();
 662
 663     qemu_mutex_lock_ramlist();
 664
 665     /* try transferring iterative blocks of memory */
 666
 667     /* flush all remaining blocks regardless of rate limiting */
 668     while (true) {
 669         int bytes_sent;
 670
 671         bytes_sent = ram_save_block(f, true);
 672         /* no more blocks to sent */
 673         if (bytes_sent < 0) {
 674             break;
 675         }
 676         bytes_transferred += bytes_sent;
 677     }
 678     migration_end();
 679
 680     qemu_mutex_unlock_ramlist();
 681     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 682
 683     return 0;
 684 }
 685
 686 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 687 {
 688     int ret, rc = 0;
 689     unsigned int xh_len;
 690     int xh_flags;
 691
 692     if (!XBZRLE.decoded_buf) {
 693         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 694     }
 695
 696     /* extract RLE header */
 697     xh_flags = qemu_get_byte(f);
 698     xh_len = qemu_get_be16(f);
 699
 700     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 701         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 702         return -1;
 703     }
 704
 705     if (xh_len > TARGET_PAGE_SIZE) {
 706         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 707         return -1;
 708     }
 709     /* load data and decode */
 710     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 711
 712     /* decode RLE */
 713     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 714                                TARGET_PAGE_SIZE);
 715     if (ret == -1) {
 716         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 717         rc = -1;
 718     } else  if (ret > TARGET_PAGE_SIZE) {
 719         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 720                 ret, TARGET_PAGE_SIZE);
 721         abort();
 722     }
 723
 724     return rc;
 725 }
 726
 727 static inline void *host_from_stream_offset(QEMUFile *f,
 728                                             ram_addr_t offset,
 729                                             int flags)
 730 {
 731     static RAMBlock *block = NULL;
 732     char id[256];
 733     uint8_t len;
 734
 735     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 736         if (!block) {
 737             fprintf(stderr, "Ack, bad migration stream!\n");
 738             return NULL;
 739         }
 740
 741         return memory_region_get_ram_ptr(block->mr) + offset;
 742     }
 743
 744     len = qemu_get_byte(f);
 745     qemu_get_buffer(f, (uint8_t *)id, len);
 746     id[len] = 0;
 747
 748     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 749         if (!strncmp(id, block->idstr, sizeof(id)))
 750             return memory_region_get_ram_ptr(block->mr) + offset;
 751     }
 752
 753     fprintf(stderr, "Can't find block %s!\n", id);
 754     return NULL;
 755 }
 756
 757 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 758 {
 759     ram_addr_t addr;
 760     int flags, ret = 0;
 761     int error;
 762     static uint64_t seq_iter;
 763
 764     seq_iter++;
 765
 766     if (version_id < 4 || version_id > 4) {
 767         return -EINVAL;
 768     }
 769
 770     do {
 771         addr = qemu_get_be64(f);
 772
 773         flags = addr & ~TARGET_PAGE_MASK;
 774         addr &= TARGET_PAGE_MASK;
 775
 776         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 777             if (version_id == 4) {
 778                 /* Synchronize RAM block list */
 779                 char id[256];
 780                 ram_addr_t length;
 781                 ram_addr_t total_ram_bytes = addr;
 782
 783                 while (total_ram_bytes) {
 784                     RAMBlock *block;
 785                     uint8_t len;
 786
 787                     len = qemu_get_byte(f);
 788                     qemu_get_buffer(f, (uint8_t *)id, len);
 789                     id[len] = 0;
 790                     length = qemu_get_be64(f);
 791
 792                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 793                         if (!strncmp(id, block->idstr, sizeof(id))) {
 794                             if (block->length != length) {
 795                                 ret =  -EINVAL;
 796                                 goto done;
 797                             }
 798                             break;
 799                         }
 800                     }
 801
 802                     if (!block) {
 803                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 804                                 "accept migration\n", id);
 805                         ret = -EINVAL;
 806                         goto done;
 807                     }
 808
 809                     total_ram_bytes -= length;
 810                 }
 811             }
 812         }
 813
 814         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 815             void *host;
 816             uint8_t ch;
 817
 818             host = host_from_stream_offset(f, addr, flags);
 819             if (!host) {
 820                 return -EINVAL;
 821             }
 822
 823             ch = qemu_get_byte(f);
 824             memset(host, ch, TARGET_PAGE_SIZE);
 825 #ifndef _WIN32
 826             if (ch == 0 &&
 827                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 828                 getpagesize() <= TARGET_PAGE_SIZE) {
 829                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 830             }
 831 #endif
 832         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 833             void *host;
 834
 835             host = host_from_stream_offset(f, addr, flags);
 836             if (!host) {
 837                 return -EINVAL;
 838             }
 839
 840             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 841         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 842             if (!migrate_use_xbzrle()) {
 843                 return -EINVAL;
 844             }
 845             void *host = host_from_stream_offset(f, addr, flags);
 846             if (!host) {
 847                 return -EINVAL;
 848             }
 849
 850             if (load_xbzrle(f, addr, host) < 0) {
 851                 ret = -EINVAL;
 852                 goto done;
 853             }
 854         }
 855         error = qemu_file_get_error(f);
 856         if (error) {
 857             ret = error;
 858             goto done;
 859         }
 860     } while (!(flags & RAM_SAVE_FLAG_EOS));
 861
 862 done:
 863     DPRINTF("Completed load of VM with exit code %d seq iteration "
 864             "%" PRIu64 "\n", ret, seq_iter);
 865     return ret;
 866 }
 867
 868 SaveVMHandlers savevm_ram_handlers = {
 869     .save_live_setup = ram_save_setup,
 870     .save_live_iterate = ram_save_iterate,
 871     .save_live_complete = ram_save_complete,
 872     .load_state = ram_load,
 873     .cancel = ram_migration_cancel,
 874 };
 875
 876 #ifdef HAS_AUDIO
 877 struct soundhw {
 878     const char *name;
 879     const char *descr;
 880     int enabled;
 881     int isa;
 882     union {
 883         int (*init_isa) (ISABus *bus);
 884         int (*init_pci) (PCIBus *bus);
 885     } init;
 886 };
 887
 888 static struct soundhw soundhw[] = {
 889 #ifdef HAS_AUDIO_CHOICE
 890 #ifdef CONFIG_PCSPK
 891     {
 892         "pcspk",
 893         "PC speaker",
 894         0,
 895         1,
 896         { .init_isa = pcspk_audio_init }
 897     },
 898 #endif
 899
 900 #ifdef CONFIG_SB16
 901     {
 902         "sb16",
 903         "Creative Sound Blaster 16",
 904         0,
 905         1,
 906         { .init_isa = SB16_init }
 907     },
 908 #endif
 909
 910 #ifdef CONFIG_CS4231A
 911     {
 912         "cs4231a",
 913         "CS4231A",
 914         0,
 915         1,
 916         { .init_isa = cs4231a_init }
 917     },
 918 #endif
 919
 920 #ifdef CONFIG_ADLIB
 921     {
 922         "adlib",
 923 #ifdef HAS_YMF262
 924         "Yamaha YMF262 (OPL3)",
 925 #else
 926         "Yamaha YM3812 (OPL2)",
 927 #endif
 928         0,
 929         1,
 930         { .init_isa = Adlib_init }
 931     },
 932 #endif
 933
 934 #ifdef CONFIG_GUS
 935     {
 936         "gus",
 937         "Gravis Ultrasound GF1",
 938         0,
 939         1,
 940         { .init_isa = GUS_init }
 941     },
 942 #endif
 943
 944 #ifdef CONFIG_AC97
 945     {
 946         "ac97",
 947         "Intel 82801AA AC97 Audio",
 948         0,
 949         0,
 950         { .init_pci = ac97_init }
 951     },
 952 #endif
 953
 954 #ifdef CONFIG_ES1370
 955     {
 956         "es1370",
 957         "ENSONIQ AudioPCI ES1370",
 958         0,
 959         0,
 960         { .init_pci = es1370_init }
 961     },
 962 #endif
 963
 964 #ifdef CONFIG_HDA
 965     {
 966         "hda",
 967         "Intel HD Audio",
 968         0,
 969         0,
 970         { .init_pci = intel_hda_and_codec_init }
 971     },
 972 #endif
 973
 974 #endif /* HAS_AUDIO_CHOICE */
 975
 976     { NULL, NULL, 0, 0, { NULL } }
 977 };
 978
 979 void select_soundhw(const char *optarg)
 980 {
 981     struct soundhw *c;
 982
 983     if (is_help_option(optarg)) {
 984     show_valid_cards:
 985
 986 #ifdef HAS_AUDIO_CHOICE
 987         printf("Valid sound card names (comma separated):\n");
 988         for (c = soundhw; c->name; ++c) {
 989             printf ("%-11s %s\n", c->name, c->descr);
 990         }
 991         printf("\n-soundhw all will enable all of the above\n");
 992 #else
 993         printf("Machine has no user-selectable audio hardware "
 994                "(it may or may not have always-present audio hardware).\n");
 995 #endif
 996         exit(!is_help_option(optarg));
 997     }
 998     else {
 999         size_t l;
1000         const char *p;
1001         char *e;
1002         int bad_card = 0;
1003
1004         if (!strcmp(optarg, "all")) {
1005             for (c = soundhw; c->name; ++c) {
1006                 c->enabled = 1;
1007             }
1008             return;
1009         }
1010
1011         p = optarg;
1012         while (*p) {
1013             e = strchr(p, ',');
1014             l = !e ? strlen(p) : (size_t) (e - p);
1015
1016             for (c = soundhw; c->name; ++c) {
1017                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1018                     c->enabled = 1;
1019                     break;
1020                 }
1021             }
1022
1023             if (!c->name) {
1024                 if (l > 80) {
1025                     fprintf(stderr,
1026                             "Unknown sound card name (too big to show)\n");
1027                 }
1028                 else {
1029                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1030                             (int) l, p);
1031                 }
1032                 bad_card = 1;
1033             }
1034             p += l + (e != NULL);
1035         }
1036
1037         if (bad_card) {
1038             goto show_valid_cards;
1039         }
1040     }
1041 }
1042
1043 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1044 {
1045     struct soundhw *c;
1046
1047     for (c = soundhw; c->name; ++c) {
1048         if (c->enabled) {
1049             if (c->isa) {
1050                 if (isa_bus) {
1051                     c->init.init_isa(isa_bus);
1052                 }
1053             } else {
1054                 if (pci_bus) {
1055                     c->init.init_pci(pci_bus);
1056                 }
1057             }
1058         }
1059     }
1060 }
1061 #else
1062 void select_soundhw(const char *optarg)
1063 {
1064 }
1065 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1066 {
1067 }
1068 #endif
1069
1070 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1071 {
1072     int ret;
1073
1074     if (strlen(str) != 36) {
1075         return -1;
1076     }
1077
1078     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1079                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1080                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1081                  &uuid[15]);
1082
1083     if (ret != 16) {
1084         return -1;
1085     }
1086 #ifdef TARGET_I386
1087     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1088 #endif
1089     return 0;
1090 }
1091
1092 void do_acpitable_option(const char *optarg)
1093 {
1094 #ifdef TARGET_I386
1095     if (acpi_table_add(optarg) < 0) {
1096         fprintf(stderr, "Wrong acpi table provided\n");
1097         exit(1);
1098     }
1099 #endif
1100 }
1101
1102 void do_smbios_option(const char *optarg)
1103 {
1104 #ifdef TARGET_I386
1105     if (smbios_entry_add(optarg) < 0) {
1106         fprintf(stderr, "Wrong smbios provided\n");
1107         exit(1);
1108     }
1109 #endif
1110 }
1111
1112 void cpudef_init(void)
1113 {
1114 #if defined(cpudef_setup)
1115     cpudef_setup(); /* parse cpu definitions in target config file */
1116 #endif
1117 }
1118
1119 int audio_available(void)
1120 {
1121 #ifdef HAS_AUDIO
1122     return 1;
1123 #else
1124     return 0;
1125 #endif
1126 }
1127
1128 int tcg_available(void)
1129 {
1130     return 1;
1131 }
1132
1133 int kvm_available(void)
1134 {
1135 #ifdef CONFIG_KVM
1136     return 1;
1137 #else
1138     return 0;
1139 #endif
1140 }
1141
1142 int xen_available(void)
1143 {
1144 #ifdef CONFIG_XEN
1145     return 1;
1146 #else
1147     return 0;
1148 #endif
1149 }
1150
1151
1152 TargetInfo *qmp_query_target(Error **errp)
1153 {
1154     TargetInfo *info = g_malloc0(sizeof(*info));
1155
1156     info->arch = TARGET_TYPE;
1157
1158     return info;
1159 }