arch_init.c

   1 /*
   2  * QEMU System Emulator
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include <stdint.h>
  25 #include <stdarg.h>
  26 #include <stdlib.h>
  27 #ifndef _WIN32
  28 #include <sys/types.h>
  29 #include <sys/mman.h>
  30 #endif
  31 #include "config.h"
  32 #include "monitor/monitor.h"
  33 #include "sysemu/sysemu.h"
  34 #include "qemu/bitops.h"
  35 #include "qemu/bitmap.h"
  36 #include "sysemu/arch_init.h"
  37 #include "audio/audio.h"
  38 #include "hw/pc.h"
  39 #include "hw/pci/pci.h"
  40 #include "hw/audiodev.h"
  41 #include "sysemu/kvm.h"
  42 #include "migration/migration.h"
  43 #include "exec/gdbstub.h"
  44 #include "hw/smbios.h"
  45 #include "exec/address-spaces.h"
  46 #include "hw/pcspk.h"
  47 #include "migration/page_cache.h"
  48 #include "qemu/config-file.h"
  49 #include "qmp-commands.h"
  50 #include "trace.h"
  51 #include "exec/cpu-all.h"
  52
  53 #ifdef DEBUG_ARCH_INIT
  54 #define DPRINTF(fmt, ...) \
  55     do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
  56 #else
  57 #define DPRINTF(fmt, ...) \
  58     do { } while (0)
  59 #endif
  60
  61 #ifdef TARGET_SPARC
  62 int graphic_width = 1024;
  63 int graphic_height = 768;
  64 int graphic_depth = 8;
  65 #else
  66 int graphic_width = 800;
  67 int graphic_height = 600;
  68 int graphic_depth = 15;
  69 #endif
  70
  71
  72 #if defined(TARGET_ALPHA)
  73 #define QEMU_ARCH QEMU_ARCH_ALPHA
  74 #elif defined(TARGET_ARM)
  75 #define QEMU_ARCH QEMU_ARCH_ARM
  76 #elif defined(TARGET_CRIS)
  77 #define QEMU_ARCH QEMU_ARCH_CRIS
  78 #elif defined(TARGET_I386)
  79 #define QEMU_ARCH QEMU_ARCH_I386
  80 #elif defined(TARGET_M68K)
  81 #define QEMU_ARCH QEMU_ARCH_M68K
  82 #elif defined(TARGET_LM32)
  83 #define QEMU_ARCH QEMU_ARCH_LM32
  84 #elif defined(TARGET_MICROBLAZE)
  85 #define QEMU_ARCH QEMU_ARCH_MICROBLAZE
  86 #elif defined(TARGET_MIPS)
  87 #define QEMU_ARCH QEMU_ARCH_MIPS
  88 #elif defined(TARGET_MOXIE)
  89 #define QEMU_ARCH QEMU_ARCH_MOXIE
  90 #elif defined(TARGET_OPENRISC)
  91 #define QEMU_ARCH QEMU_ARCH_OPENRISC
  92 #elif defined(TARGET_PPC)
  93 #define QEMU_ARCH QEMU_ARCH_PPC
  94 #elif defined(TARGET_S390X)
  95 #define QEMU_ARCH QEMU_ARCH_S390X
  96 #elif defined(TARGET_SH4)
  97 #define QEMU_ARCH QEMU_ARCH_SH4
  98 #elif defined(TARGET_SPARC)
  99 #define QEMU_ARCH QEMU_ARCH_SPARC
 100 #elif defined(TARGET_XTENSA)
 101 #define QEMU_ARCH QEMU_ARCH_XTENSA
 102 #elif defined(TARGET_UNICORE32)
 103 #define QEMU_ARCH QEMU_ARCH_UNICORE32
 104 #endif
 105
 106 const uint32_t arch_type = QEMU_ARCH;
 107
 108 /***********************************************************/
 109 /* ram save/restore */
 110
 111 #define RAM_SAVE_FLAG_FULL     0x01 /* Obsolete, not used anymore */
 112 #define RAM_SAVE_FLAG_COMPRESS 0x02
 113 #define RAM_SAVE_FLAG_MEM_SIZE 0x04
 114 #define RAM_SAVE_FLAG_PAGE     0x08
 115 #define RAM_SAVE_FLAG_EOS      0x10
 116 #define RAM_SAVE_FLAG_CONTINUE 0x20
 117 #define RAM_SAVE_FLAG_XBZRLE   0x40
 118
 119 #ifdef __ALTIVEC__
 120 #include <altivec.h>
 121 #define VECTYPE        vector unsigned char
 122 #define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
 123 #define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
 124 /* altivec.h may redefine the bool macro as vector type.
 125  * Reset it to POSIX semantics. */
 126 #undef bool
 127 #define bool _Bool
 128 #elif defined __SSE2__
 129 #include <emmintrin.h>
 130 #define VECTYPE        __m128i
 131 #define SPLAT(p)       _mm_set1_epi8(*(p))
 132 #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
 133 #else
 134 #define VECTYPE        unsigned long
 135 #define SPLAT(p)       (*(p) * (~0UL / 255))
 136 #define ALL_EQ(v1, v2) ((v1) == (v2))
 137 #endif
 138
 139
 140 static struct defconfig_file {
 141     const char *filename;
 142     /* Indicates it is an user config file (disabled by -no-user-config) */
 143     bool userconfig;
 144 } default_config_files[] = {
 145     { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
 146     { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
 147     { NULL }, /* end of list */
 148 };
 149
 150
 151 int qemu_read_default_config_files(bool userconfig)
 152 {
 153     int ret;
 154     struct defconfig_file *f;
 155
 156     for (f = default_config_files; f->filename; f++) {
 157         if (!userconfig && f->userconfig) {
 158             continue;
 159         }
 160         ret = qemu_read_config_file(f->filename);
 161         if (ret < 0 && ret != -ENOENT) {
 162             return ret;
 163         }
 164     }
 165
 166     return 0;
 167 }
 168
 169 static int is_dup_page(uint8_t *page)
 170 {
 171     VECTYPE *p = (VECTYPE *)page;
 172     VECTYPE val = SPLAT(page);
 173     int i;
 174
 175     for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) {
 176         if (!ALL_EQ(val, p[i])) {
 177             return 0;
 178         }
 179     }
 180
 181     return 1;
 182 }
 183
 184 /* struct contains XBZRLE cache and a static page
 185    used by the compression */
 186 static struct {
 187     /* buffer used for XBZRLE encoding */
 188     uint8_t *encoded_buf;
 189     /* buffer for storing page content */
 190     uint8_t *current_buf;
 191     /* buffer used for XBZRLE decoding */
 192     uint8_t *decoded_buf;
 193     /* Cache for XBZRLE */
 194     PageCache *cache;
 195 } XBZRLE = {
 196     .encoded_buf = NULL,
 197     .current_buf = NULL,
 198     .decoded_buf = NULL,
 199     .cache = NULL,
 200 };
 201
 202
 203 int64_t xbzrle_cache_resize(int64_t new_size)
 204 {
 205     if (XBZRLE.cache != NULL) {
 206         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 207             TARGET_PAGE_SIZE;
 208     }
 209     return pow2floor(new_size);
 210 }
 211
 212 /* accounting for migration statistics */
 213 typedef struct AccountingInfo {
 214     uint64_t dup_pages;
 215     uint64_t norm_pages;
 216     uint64_t iterations;
 217     uint64_t xbzrle_bytes;
 218     uint64_t xbzrle_pages;
 219     uint64_t xbzrle_cache_miss;
 220     uint64_t xbzrle_overflows;
 221 } AccountingInfo;
 222
 223 static AccountingInfo acct_info;
 224
 225 static void acct_clear(void)
 226 {
 227     memset(&acct_info, 0, sizeof(acct_info));
 228 }
 229
 230 uint64_t dup_mig_bytes_transferred(void)
 231 {
 232     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 233 }
 234
 235 uint64_t dup_mig_pages_transferred(void)
 236 {
 237     return acct_info.dup_pages;
 238 }
 239
 240 uint64_t norm_mig_bytes_transferred(void)
 241 {
 242     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 243 }
 244
 245 uint64_t norm_mig_pages_transferred(void)
 246 {
 247     return acct_info.norm_pages;
 248 }
 249
 250 uint64_t xbzrle_mig_bytes_transferred(void)
 251 {
 252     return acct_info.xbzrle_bytes;
 253 }
 254
 255 uint64_t xbzrle_mig_pages_transferred(void)
 256 {
 257     return acct_info.xbzrle_pages;
 258 }
 259
 260 uint64_t xbzrle_mig_pages_cache_miss(void)
 261 {
 262     return acct_info.xbzrle_cache_miss;
 263 }
 264
 265 uint64_t xbzrle_mig_pages_overflow(void)
 266 {
 267     return acct_info.xbzrle_overflows;
 268 }
 269
 270 static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 271                              int cont, int flag)
 272 {
 273     size_t size;
 274
 275     qemu_put_be64(f, offset | cont | flag);
 276     size = 8;
 277
 278     if (!cont) {
 279         qemu_put_byte(f, strlen(block->idstr));
 280         qemu_put_buffer(f, (uint8_t *)block->idstr,
 281                         strlen(block->idstr));
 282         size += 1 + strlen(block->idstr);
 283     }
 284     return size;
 285 }
 286
 287 #define ENCODING_FLAG_XBZRLE 0x1
 288
 289 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 290                             ram_addr_t current_addr, RAMBlock *block,
 291                             ram_addr_t offset, int cont, bool last_stage)
 292 {
 293     int encoded_len = 0, bytes_sent = -1;
 294     uint8_t *prev_cached_page;
 295
 296     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 297         if (!last_stage) {
 298             cache_insert(XBZRLE.cache, current_addr, current_data);
 299         }
 300         acct_info.xbzrle_cache_miss++;
 301         return -1;
 302     }
 303
 304     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 305
 306     /* save current buffer into memory */
 307     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 308
 309     /* XBZRLE encoding (if there is no overflow) */
 310     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 311                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 312                                        TARGET_PAGE_SIZE);
 313     if (encoded_len == 0) {
 314         DPRINTF("Skipping unmodified page\n");
 315         return 0;
 316     } else if (encoded_len == -1) {
 317         DPRINTF("Overflow\n");
 318         acct_info.xbzrle_overflows++;
 319         /* update data in the cache */
 320         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 321         return -1;
 322     }
 323
 324     /* we need to update the data in the cache, in order to get the same data */
 325     if (!last_stage) {
 326         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 327     }
 328
 329     /* Send XBZRLE based compressed page */
 330     bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 331     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 332     qemu_put_be16(f, encoded_len);
 333     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 334     bytes_sent += encoded_len + 1 + 2;
 335     acct_info.xbzrle_pages++;
 336     acct_info.xbzrle_bytes += bytes_sent;
 337
 338     return bytes_sent;
 339 }
 340
 341
 342 /* This is the last block that we have visited serching for dirty pages
 343  */
 344 static RAMBlock *last_seen_block;
 345 /* This is the last block from where we have sent data */
 346 static RAMBlock *last_sent_block;
 347 static ram_addr_t last_offset;
 348 static unsigned long *migration_bitmap;
 349 static uint64_t migration_dirty_pages;
 350 static uint32_t last_version;
 351
 352 static inline
 353 ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
 354                                                  ram_addr_t start)
 355 {
 356     unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
 357     unsigned long nr = base + (start >> TARGET_PAGE_BITS);
 358     unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
 359
 360     unsigned long next = find_next_bit(migration_bitmap, size, nr);
 361
 362     if (next < size) {
 363         clear_bit(next, migration_bitmap);
 364         migration_dirty_pages--;
 365     }
 366     return (next - base) << TARGET_PAGE_BITS;
 367 }
 368
 369 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 370                                               ram_addr_t offset)
 371 {
 372     bool ret;
 373     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 374
 375     ret = test_and_set_bit(nr, migration_bitmap);
 376
 377     if (!ret) {
 378         migration_dirty_pages++;
 379     }
 380     return ret;
 381 }
 382
 383 /* Needs iothread lock! */
 384
 385 static void migration_bitmap_sync(void)
 386 {
 387     RAMBlock *block;
 388     ram_addr_t addr;
 389     uint64_t num_dirty_pages_init = migration_dirty_pages;
 390     MigrationState *s = migrate_get_current();
 391     static int64_t start_time;
 392     static int64_t num_dirty_pages_period;
 393     int64_t end_time;
 394
 395     if (!start_time) {
 396         start_time = qemu_get_clock_ms(rt_clock);
 397     }
 398
 399     trace_migration_bitmap_sync_start();
 400     memory_global_sync_dirty_bitmap(get_system_memory());
 401
 402     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 403         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 404             if (memory_region_test_and_clear_dirty(block->mr,
 405                                                    addr, TARGET_PAGE_SIZE,
 406                                                    DIRTY_MEMORY_MIGRATION)) {
 407                 migration_bitmap_set_dirty(block->mr, addr);
 408             }
 409         }
 410     }
 411     trace_migration_bitmap_sync_end(migration_dirty_pages
 412                                     - num_dirty_pages_init);
 413     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 414     end_time = qemu_get_clock_ms(rt_clock);
 415
 416     /* more than 1 second = 1000 millisecons */
 417     if (end_time > start_time + 1000) {
 418         s->dirty_pages_rate = num_dirty_pages_period * 1000
 419             / (end_time - start_time);
 420         s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
 421         start_time = end_time;
 422         num_dirty_pages_period = 0;
 423     }
 424 }
 425
 426 /*
 427  * ram_save_block: Writes a page of memory to the stream f
 428  *
 429  * Returns:  The number of bytes written.
 430  *           0 means no dirty pages
 431  */
 432
 433 static int ram_save_block(QEMUFile *f, bool last_stage)
 434 {
 435     RAMBlock *block = last_seen_block;
 436     ram_addr_t offset = last_offset;
 437     bool complete_round = false;
 438     int bytes_sent = 0;
 439     MemoryRegion *mr;
 440     ram_addr_t current_addr;
 441
 442     if (!block)
 443         block = QTAILQ_FIRST(&ram_list.blocks);
 444
 445     while (true) {
 446         mr = block->mr;
 447         offset = migration_bitmap_find_and_reset_dirty(mr, offset);
 448         if (complete_round && block == last_seen_block &&
 449             offset >= last_offset) {
 450             break;
 451         }
 452         if (offset >= block->length) {
 453             offset = 0;
 454             block = QTAILQ_NEXT(block, next);
 455             if (!block) {
 456                 block = QTAILQ_FIRST(&ram_list.blocks);
 457                 complete_round = true;
 458             }
 459         } else {
 460             uint8_t *p;
 461             int cont = (block == last_sent_block) ?
 462                 RAM_SAVE_FLAG_CONTINUE : 0;
 463
 464             p = memory_region_get_ram_ptr(mr) + offset;
 465
 466             /* In doubt sent page as normal */
 467             bytes_sent = -1;
 468             if (is_dup_page(p)) {
 469                 acct_info.dup_pages++;
 470                 bytes_sent = save_block_hdr(f, block, offset, cont,
 471                                             RAM_SAVE_FLAG_COMPRESS);
 472                 qemu_put_byte(f, *p);
 473                 bytes_sent += 1;
 474             } else if (migrate_use_xbzrle()) {
 475                 current_addr = block->offset + offset;
 476                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 477                                               offset, cont, last_stage);
 478                 if (!last_stage) {
 479                     p = get_cached_data(XBZRLE.cache, current_addr);
 480                 }
 481             }
 482
 483             /* XBZRLE overflow or normal page */
 484             if (bytes_sent == -1) {
 485                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 486                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 487                 bytes_sent += TARGET_PAGE_SIZE;
 488                 acct_info.norm_pages++;
 489             }
 490
 491             /* if page is unmodified, continue to the next */
 492             if (bytes_sent > 0) {
 493                 last_sent_block = block;
 494                 break;
 495             }
 496         }
 497     }
 498     last_seen_block = block;
 499     last_offset = offset;
 500
 501     return bytes_sent;
 502 }
 503
 504 static uint64_t bytes_transferred;
 505
 506 static ram_addr_t ram_save_remaining(void)
 507 {
 508     return migration_dirty_pages;
 509 }
 510
 511 uint64_t ram_bytes_remaining(void)
 512 {
 513     return ram_save_remaining() * TARGET_PAGE_SIZE;
 514 }
 515
 516 uint64_t ram_bytes_transferred(void)
 517 {
 518     return bytes_transferred;
 519 }
 520
 521 uint64_t ram_bytes_total(void)
 522 {
 523     RAMBlock *block;
 524     uint64_t total = 0;
 525
 526     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 527         total += block->length;
 528
 529     return total;
 530 }
 531
 532 static void migration_end(void)
 533 {
 534     if (migration_bitmap) {
 535         memory_global_dirty_log_stop();
 536         g_free(migration_bitmap);
 537         migration_bitmap = NULL;
 538     }
 539
 540     if (XBZRLE.cache) {
 541         cache_fini(XBZRLE.cache);
 542         g_free(XBZRLE.cache);
 543         g_free(XBZRLE.encoded_buf);
 544         g_free(XBZRLE.current_buf);
 545         g_free(XBZRLE.decoded_buf);
 546         XBZRLE.cache = NULL;
 547     }
 548 }
 549
 550 static void ram_migration_cancel(void *opaque)
 551 {
 552     migration_end();
 553 }
 554
 555 static void reset_ram_globals(void)
 556 {
 557     last_seen_block = NULL;
 558     last_sent_block = NULL;
 559     last_offset = 0;
 560     last_version = ram_list.version;
 561 }
 562
 563 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 564
 565 static int ram_save_setup(QEMUFile *f, void *opaque)
 566 {
 567     RAMBlock *block;
 568     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 569
 570     migration_bitmap = bitmap_new(ram_pages);
 571     bitmap_set(migration_bitmap, 0, ram_pages);
 572     migration_dirty_pages = ram_pages;
 573
 574     if (migrate_use_xbzrle()) {
 575         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 576                                   TARGET_PAGE_SIZE,
 577                                   TARGET_PAGE_SIZE);
 578         if (!XBZRLE.cache) {
 579             DPRINTF("Error creating cache\n");
 580             return -1;
 581         }
 582         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 583         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 584         acct_clear();
 585     }
 586
 587     qemu_mutex_lock_iothread();
 588     qemu_mutex_lock_ramlist();
 589     bytes_transferred = 0;
 590     reset_ram_globals();
 591
 592     memory_global_dirty_log_start();
 593     migration_bitmap_sync();
 594     qemu_mutex_unlock_iothread();
 595
 596     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 597
 598     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 599         qemu_put_byte(f, strlen(block->idstr));
 600         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 601         qemu_put_be64(f, block->length);
 602     }
 603
 604     qemu_mutex_unlock_ramlist();
 605     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 606
 607     return 0;
 608 }
 609
 610 static int ram_save_iterate(QEMUFile *f, void *opaque)
 611 {
 612     int ret;
 613     int i;
 614     int64_t t0;
 615     int total_sent = 0;
 616
 617     qemu_mutex_lock_ramlist();
 618
 619     if (ram_list.version != last_version) {
 620         reset_ram_globals();
 621     }
 622
 623     t0 = qemu_get_clock_ns(rt_clock);
 624     i = 0;
 625     while ((ret = qemu_file_rate_limit(f)) == 0) {
 626         int bytes_sent;
 627
 628         bytes_sent = ram_save_block(f, false);
 629         /* no more blocks to sent */
 630         if (bytes_sent == 0) {
 631             break;
 632         }
 633         total_sent += bytes_sent;
 634         acct_info.iterations++;
 635         /* we want to check in the 1st loop, just in case it was the 1st time
 636            and we had to sync the dirty bitmap.
 637            qemu_get_clock_ns() is a bit expensive, so we only check each some
 638            iterations
 639         */
 640         if ((i & 63) == 0) {
 641             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 642             if (t1 > MAX_WAIT) {
 643                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 644                         t1, i);
 645                 break;
 646             }
 647         }
 648         i++;
 649     }
 650
 651     qemu_mutex_unlock_ramlist();
 652
 653     if (ret < 0) {
 654         bytes_transferred += total_sent;
 655         return ret;
 656     }
 657
 658     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 659     total_sent += 8;
 660     bytes_transferred += total_sent;
 661
 662     return total_sent;
 663 }
 664
 665 static int ram_save_complete(QEMUFile *f, void *opaque)
 666 {
 667     qemu_mutex_lock_ramlist();
 668     migration_bitmap_sync();
 669
 670     /* try transferring iterative blocks of memory */
 671
 672     /* flush all remaining blocks regardless of rate limiting */
 673     while (true) {
 674         int bytes_sent;
 675
 676         bytes_sent = ram_save_block(f, true);
 677         /* no more blocks to sent */
 678         if (bytes_sent == 0) {
 679             break;
 680         }
 681         bytes_transferred += bytes_sent;
 682     }
 683     migration_end();
 684
 685     qemu_mutex_unlock_ramlist();
 686     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 687
 688     return 0;
 689 }
 690
 691 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 692 {
 693     uint64_t remaining_size;
 694
 695     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 696
 697     if (remaining_size < max_size) {
 698         qemu_mutex_lock_iothread();
 699         migration_bitmap_sync();
 700         qemu_mutex_unlock_iothread();
 701         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 702     }
 703     return remaining_size;
 704 }
 705
 706 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 707 {
 708     int ret, rc = 0;
 709     unsigned int xh_len;
 710     int xh_flags;
 711
 712     if (!XBZRLE.decoded_buf) {
 713         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 714     }
 715
 716     /* extract RLE header */
 717     xh_flags = qemu_get_byte(f);
 718     xh_len = qemu_get_be16(f);
 719
 720     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 721         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 722         return -1;
 723     }
 724
 725     if (xh_len > TARGET_PAGE_SIZE) {
 726         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 727         return -1;
 728     }
 729     /* load data and decode */
 730     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 731
 732     /* decode RLE */
 733     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 734                                TARGET_PAGE_SIZE);
 735     if (ret == -1) {
 736         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 737         rc = -1;
 738     } else  if (ret > TARGET_PAGE_SIZE) {
 739         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 740                 ret, TARGET_PAGE_SIZE);
 741         abort();
 742     }
 743
 744     return rc;
 745 }
 746
 747 static inline void *host_from_stream_offset(QEMUFile *f,
 748                                             ram_addr_t offset,
 749                                             int flags)
 750 {
 751     static RAMBlock *block = NULL;
 752     char id[256];
 753     uint8_t len;
 754
 755     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 756         if (!block) {
 757             fprintf(stderr, "Ack, bad migration stream!\n");
 758             return NULL;
 759         }
 760
 761         return memory_region_get_ram_ptr(block->mr) + offset;
 762     }
 763
 764     len = qemu_get_byte(f);
 765     qemu_get_buffer(f, (uint8_t *)id, len);
 766     id[len] = 0;
 767
 768     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 769         if (!strncmp(id, block->idstr, sizeof(id)))
 770             return memory_region_get_ram_ptr(block->mr) + offset;
 771     }
 772
 773     fprintf(stderr, "Can't find block %s!\n", id);
 774     return NULL;
 775 }
 776
 777 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 778 {
 779     ram_addr_t addr;
 780     int flags, ret = 0;
 781     int error;
 782     static uint64_t seq_iter;
 783
 784     seq_iter++;
 785
 786     if (version_id < 4 || version_id > 4) {
 787         return -EINVAL;
 788     }
 789
 790     do {
 791         addr = qemu_get_be64(f);
 792
 793         flags = addr & ~TARGET_PAGE_MASK;
 794         addr &= TARGET_PAGE_MASK;
 795
 796         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 797             if (version_id == 4) {
 798                 /* Synchronize RAM block list */
 799                 char id[256];
 800                 ram_addr_t length;
 801                 ram_addr_t total_ram_bytes = addr;
 802
 803                 while (total_ram_bytes) {
 804                     RAMBlock *block;
 805                     uint8_t len;
 806
 807                     len = qemu_get_byte(f);
 808                     qemu_get_buffer(f, (uint8_t *)id, len);
 809                     id[len] = 0;
 810                     length = qemu_get_be64(f);
 811
 812                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 813                         if (!strncmp(id, block->idstr, sizeof(id))) {
 814                             if (block->length != length) {
 815                                 ret =  -EINVAL;
 816                                 goto done;
 817                             }
 818                             break;
 819                         }
 820                     }
 821
 822                     if (!block) {
 823                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 824                                 "accept migration\n", id);
 825                         ret = -EINVAL;
 826                         goto done;
 827                     }
 828
 829                     total_ram_bytes -= length;
 830                 }
 831             }
 832         }
 833
 834         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 835             void *host;
 836             uint8_t ch;
 837
 838             host = host_from_stream_offset(f, addr, flags);
 839             if (!host) {
 840                 return -EINVAL;
 841             }
 842
 843             ch = qemu_get_byte(f);
 844             memset(host, ch, TARGET_PAGE_SIZE);
 845 #ifndef _WIN32
 846             if (ch == 0 &&
 847                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 848                 getpagesize() <= TARGET_PAGE_SIZE) {
 849                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 850             }
 851 #endif
 852         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 853             void *host;
 854
 855             host = host_from_stream_offset(f, addr, flags);
 856             if (!host) {
 857                 return -EINVAL;
 858             }
 859
 860             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 861         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 862             void *host = host_from_stream_offset(f, addr, flags);
 863             if (!host) {
 864                 return -EINVAL;
 865             }
 866
 867             if (load_xbzrle(f, addr, host) < 0) {
 868                 ret = -EINVAL;
 869                 goto done;
 870             }
 871         }
 872         error = qemu_file_get_error(f);
 873         if (error) {
 874             ret = error;
 875             goto done;
 876         }
 877     } while (!(flags & RAM_SAVE_FLAG_EOS));
 878
 879 done:
 880     DPRINTF("Completed load of VM with exit code %d seq iteration "
 881             "%" PRIu64 "\n", ret, seq_iter);
 882     return ret;
 883 }
 884
 885 SaveVMHandlers savevm_ram_handlers = {
 886     .save_live_setup = ram_save_setup,
 887     .save_live_iterate = ram_save_iterate,
 888     .save_live_complete = ram_save_complete,
 889     .save_live_pending = ram_save_pending,
 890     .load_state = ram_load,
 891     .cancel = ram_migration_cancel,
 892 };
 893
 894 #ifdef HAS_AUDIO
 895 struct soundhw {
 896     const char *name;
 897     const char *descr;
 898     int enabled;
 899     int isa;
 900     union {
 901         int (*init_isa) (ISABus *bus);
 902         int (*init_pci) (PCIBus *bus);
 903     } init;
 904 };
 905
 906 static struct soundhw soundhw[] = {
 907 #ifdef HAS_AUDIO_CHOICE
 908 #ifdef CONFIG_PCSPK
 909     {
 910         "pcspk",
 911         "PC speaker",
 912         0,
 913         1,
 914         { .init_isa = pcspk_audio_init }
 915     },
 916 #endif
 917
 918 #ifdef CONFIG_SB16
 919     {
 920         "sb16",
 921         "Creative Sound Blaster 16",
 922         0,
 923         1,
 924         { .init_isa = SB16_init }
 925     },
 926 #endif
 927
 928 #ifdef CONFIG_CS4231A
 929     {
 930         "cs4231a",
 931         "CS4231A",
 932         0,
 933         1,
 934         { .init_isa = cs4231a_init }
 935     },
 936 #endif
 937
 938 #ifdef CONFIG_ADLIB
 939     {
 940         "adlib",
 941 #ifdef HAS_YMF262
 942         "Yamaha YMF262 (OPL3)",
 943 #else
 944         "Yamaha YM3812 (OPL2)",
 945 #endif
 946         0,
 947         1,
 948         { .init_isa = Adlib_init }
 949     },
 950 #endif
 951
 952 #ifdef CONFIG_GUS
 953     {
 954         "gus",
 955         "Gravis Ultrasound GF1",
 956         0,
 957         1,
 958         { .init_isa = GUS_init }
 959     },
 960 #endif
 961
 962 #ifdef CONFIG_AC97
 963     {
 964         "ac97",
 965         "Intel 82801AA AC97 Audio",
 966         0,
 967         0,
 968         { .init_pci = ac97_init }
 969     },
 970 #endif
 971
 972 #ifdef CONFIG_ES1370
 973     {
 974         "es1370",
 975         "ENSONIQ AudioPCI ES1370",
 976         0,
 977         0,
 978         { .init_pci = es1370_init }
 979     },
 980 #endif
 981
 982 #ifdef CONFIG_HDA
 983     {
 984         "hda",
 985         "Intel HD Audio",
 986         0,
 987         0,
 988         { .init_pci = intel_hda_and_codec_init }
 989     },
 990 #endif
 991
 992 #endif /* HAS_AUDIO_CHOICE */
 993
 994     { NULL, NULL, 0, 0, { NULL } }
 995 };
 996
 997 void select_soundhw(const char *optarg)
 998 {
 999     struct soundhw *c;
1000
1001     if (is_help_option(optarg)) {
1002     show_valid_cards:
1003
1004 #ifdef HAS_AUDIO_CHOICE
1005         printf("Valid sound card names (comma separated):\n");
1006         for (c = soundhw; c->name; ++c) {
1007             printf ("%-11s %s\n", c->name, c->descr);
1008         }
1009         printf("\n-soundhw all will enable all of the above\n");
1010 #else
1011         printf("Machine has no user-selectable audio hardware "
1012                "(it may or may not have always-present audio hardware).\n");
1013 #endif
1014         exit(!is_help_option(optarg));
1015     }
1016     else {
1017         size_t l;
1018         const char *p;
1019         char *e;
1020         int bad_card = 0;
1021
1022         if (!strcmp(optarg, "all")) {
1023             for (c = soundhw; c->name; ++c) {
1024                 c->enabled = 1;
1025             }
1026             return;
1027         }
1028
1029         p = optarg;
1030         while (*p) {
1031             e = strchr(p, ',');
1032             l = !e ? strlen(p) : (size_t) (e - p);
1033
1034             for (c = soundhw; c->name; ++c) {
1035                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1036                     c->enabled = 1;
1037                     break;
1038                 }
1039             }
1040
1041             if (!c->name) {
1042                 if (l > 80) {
1043                     fprintf(stderr,
1044                             "Unknown sound card name (too big to show)\n");
1045                 }
1046                 else {
1047                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1048                             (int) l, p);
1049                 }
1050                 bad_card = 1;
1051             }
1052             p += l + (e != NULL);
1053         }
1054
1055         if (bad_card) {
1056             goto show_valid_cards;
1057         }
1058     }
1059 }
1060
1061 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1062 {
1063     struct soundhw *c;
1064
1065     for (c = soundhw; c->name; ++c) {
1066         if (c->enabled) {
1067             if (c->isa) {
1068                 if (isa_bus) {
1069                     c->init.init_isa(isa_bus);
1070                 }
1071             } else {
1072                 if (pci_bus) {
1073                     c->init.init_pci(pci_bus);
1074                 }
1075             }
1076         }
1077     }
1078 }
1079 #else
1080 void select_soundhw(const char *optarg)
1081 {
1082 }
1083 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1084 {
1085 }
1086 #endif
1087
1088 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1089 {
1090     int ret;
1091
1092     if (strlen(str) != 36) {
1093         return -1;
1094     }
1095
1096     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1097                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1098                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1099                  &uuid[15]);
1100
1101     if (ret != 16) {
1102         return -1;
1103     }
1104 #ifdef TARGET_I386
1105     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1106 #endif
1107     return 0;
1108 }
1109
1110 void do_acpitable_option(const char *optarg)
1111 {
1112 #ifdef TARGET_I386
1113     if (acpi_table_add(optarg) < 0) {
1114         fprintf(stderr, "Wrong acpi table provided\n");
1115         exit(1);
1116     }
1117 #endif
1118 }
1119
1120 void do_smbios_option(const char *optarg)
1121 {
1122 #ifdef TARGET_I386
1123     if (smbios_entry_add(optarg) < 0) {
1124         fprintf(stderr, "Wrong smbios provided\n");
1125         exit(1);
1126     }
1127 #endif
1128 }
1129
1130 void cpudef_init(void)
1131 {
1132 #if defined(cpudef_setup)
1133     cpudef_setup(); /* parse cpu definitions in target config file */
1134 #endif
1135 }
1136
1137 int audio_available(void)
1138 {
1139 #ifdef HAS_AUDIO
1140     return 1;
1141 #else
1142     return 0;
1143 #endif
1144 }
1145
1146 int tcg_available(void)
1147 {
1148     return 1;
1149 }
1150
1151 int kvm_available(void)
1152 {
1153 #ifdef CONFIG_KVM
1154     return 1;
1155 #else
1156     return 0;
1157 #endif
1158 }
1159
1160 int xen_available(void)
1161 {
1162 #ifdef CONFIG_XEN
1163     return 1;
1164 #else
1165     return 0;
1166 #endif
1167 }
1168
1169
1170 TargetInfo *qmp_query_target(Error **errp)
1171 {
1172     TargetInfo *info = g_malloc0(sizeof(*info));
1173
1174     info->arch = TARGET_TYPE;
1175
1176     return info;
1177 }