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/i386/pc.h"
  39 #include "hw/pci/pci.h"
  40 #include "hw/audio/audio.h"
  41 #include "sysemu/kvm.h"
  42 #include "migration/migration.h"
  43 #include "hw/i386/smbios.h"
  44 #include "exec/address-spaces.h"
  45 #include "hw/audio/pcspk.h"
  46 #include "migration/page_cache.h"
  47 #include "qemu/config-file.h"
  48 #include "qmp-commands.h"
  49 #include "trace.h"
  50 #include "exec/cpu-all.h"
  51 #include "hw/acpi/acpi.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
 120 static struct defconfig_file {
 121     const char *filename;
 122     /* Indicates it is an user config file (disabled by -no-user-config) */
 123     bool userconfig;
 124 } default_config_files[] = {
 125     { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
 126     { CONFIG_QEMU_CONFDIR "/target-" TARGET_NAME ".conf", true },
 127     { NULL }, /* end of list */
 128 };
 129
 130
 131 int qemu_read_default_config_files(bool userconfig)
 132 {
 133     int ret;
 134     struct defconfig_file *f;
 135
 136     for (f = default_config_files; f->filename; f++) {
 137         if (!userconfig && f->userconfig) {
 138             continue;
 139         }
 140         ret = qemu_read_config_file(f->filename);
 141         if (ret < 0 && ret != -ENOENT) {
 142             return ret;
 143         }
 144     }
 145
 146     return 0;
 147 }
 148
 149 static inline bool is_zero_page(uint8_t *p)
 150 {
 151     return buffer_find_nonzero_offset(p, TARGET_PAGE_SIZE) ==
 152         TARGET_PAGE_SIZE;
 153 }
 154
 155 /* struct contains XBZRLE cache and a static page
 156    used by the compression */
 157 static struct {
 158     /* buffer used for XBZRLE encoding */
 159     uint8_t *encoded_buf;
 160     /* buffer for storing page content */
 161     uint8_t *current_buf;
 162     /* buffer used for XBZRLE decoding */
 163     uint8_t *decoded_buf;
 164     /* Cache for XBZRLE */
 165     PageCache *cache;
 166 } XBZRLE = {
 167     .encoded_buf = NULL,
 168     .current_buf = NULL,
 169     .decoded_buf = NULL,
 170     .cache = NULL,
 171 };
 172
 173
 174 int64_t xbzrle_cache_resize(int64_t new_size)
 175 {
 176     if (XBZRLE.cache != NULL) {
 177         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 178             TARGET_PAGE_SIZE;
 179     }
 180     return pow2floor(new_size);
 181 }
 182
 183 /* accounting for migration statistics */
 184 typedef struct AccountingInfo {
 185     uint64_t dup_pages;
 186     uint64_t skipped_pages;
 187     uint64_t norm_pages;
 188     uint64_t iterations;
 189     uint64_t xbzrle_bytes;
 190     uint64_t xbzrle_pages;
 191     uint64_t xbzrle_cache_miss;
 192     uint64_t xbzrle_overflows;
 193 } AccountingInfo;
 194
 195 static AccountingInfo acct_info;
 196
 197 static void acct_clear(void)
 198 {
 199     memset(&acct_info, 0, sizeof(acct_info));
 200 }
 201
 202 uint64_t dup_mig_bytes_transferred(void)
 203 {
 204     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 205 }
 206
 207 uint64_t dup_mig_pages_transferred(void)
 208 {
 209     return acct_info.dup_pages;
 210 }
 211
 212 uint64_t skipped_mig_bytes_transferred(void)
 213 {
 214     return acct_info.skipped_pages * TARGET_PAGE_SIZE;
 215 }
 216
 217 uint64_t skipped_mig_pages_transferred(void)
 218 {
 219     return acct_info.skipped_pages;
 220 }
 221
 222 uint64_t norm_mig_bytes_transferred(void)
 223 {
 224     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 225 }
 226
 227 uint64_t norm_mig_pages_transferred(void)
 228 {
 229     return acct_info.norm_pages;
 230 }
 231
 232 uint64_t xbzrle_mig_bytes_transferred(void)
 233 {
 234     return acct_info.xbzrle_bytes;
 235 }
 236
 237 uint64_t xbzrle_mig_pages_transferred(void)
 238 {
 239     return acct_info.xbzrle_pages;
 240 }
 241
 242 uint64_t xbzrle_mig_pages_cache_miss(void)
 243 {
 244     return acct_info.xbzrle_cache_miss;
 245 }
 246
 247 uint64_t xbzrle_mig_pages_overflow(void)
 248 {
 249     return acct_info.xbzrle_overflows;
 250 }
 251
 252 static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 253                              int cont, int flag)
 254 {
 255     size_t size;
 256
 257     qemu_put_be64(f, offset | cont | flag);
 258     size = 8;
 259
 260     if (!cont) {
 261         qemu_put_byte(f, strlen(block->idstr));
 262         qemu_put_buffer(f, (uint8_t *)block->idstr,
 263                         strlen(block->idstr));
 264         size += 1 + strlen(block->idstr);
 265     }
 266     return size;
 267 }
 268
 269 #define ENCODING_FLAG_XBZRLE 0x1
 270
 271 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 272                             ram_addr_t current_addr, RAMBlock *block,
 273                             ram_addr_t offset, int cont, bool last_stage)
 274 {
 275     int encoded_len = 0, bytes_sent = -1;
 276     uint8_t *prev_cached_page;
 277
 278     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 279         if (!last_stage) {
 280             cache_insert(XBZRLE.cache, current_addr, current_data);
 281         }
 282         acct_info.xbzrle_cache_miss++;
 283         return -1;
 284     }
 285
 286     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 287
 288     /* save current buffer into memory */
 289     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 290
 291     /* XBZRLE encoding (if there is no overflow) */
 292     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 293                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 294                                        TARGET_PAGE_SIZE);
 295     if (encoded_len == 0) {
 296         DPRINTF("Skipping unmodified page\n");
 297         return 0;
 298     } else if (encoded_len == -1) {
 299         DPRINTF("Overflow\n");
 300         acct_info.xbzrle_overflows++;
 301         /* update data in the cache */
 302         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 303         return -1;
 304     }
 305
 306     /* we need to update the data in the cache, in order to get the same data */
 307     if (!last_stage) {
 308         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 309     }
 310
 311     /* Send XBZRLE based compressed page */
 312     bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 313     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 314     qemu_put_be16(f, encoded_len);
 315     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 316     bytes_sent += encoded_len + 1 + 2;
 317     acct_info.xbzrle_pages++;
 318     acct_info.xbzrle_bytes += bytes_sent;
 319
 320     return bytes_sent;
 321 }
 322
 323
 324 /* This is the last block that we have visited serching for dirty pages
 325  */
 326 static RAMBlock *last_seen_block;
 327 /* This is the last block from where we have sent data */
 328 static RAMBlock *last_sent_block;
 329 static ram_addr_t last_offset;
 330 static unsigned long *migration_bitmap;
 331 static uint64_t migration_dirty_pages;
 332 static uint32_t last_version;
 333 static bool ram_bulk_stage;
 334
 335 static inline
 336 ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
 337                                                  ram_addr_t start)
 338 {
 339     unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
 340     unsigned long nr = base + (start >> TARGET_PAGE_BITS);
 341     unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
 342
 343     unsigned long next;
 344
 345     if (ram_bulk_stage && nr > base) {
 346         next = nr + 1;
 347     } else {
 348         next = find_next_bit(migration_bitmap, size, nr);
 349     }
 350
 351     if (next < size) {
 352         clear_bit(next, migration_bitmap);
 353         migration_dirty_pages--;
 354     }
 355     return (next - base) << TARGET_PAGE_BITS;
 356 }
 357
 358 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 359                                               ram_addr_t offset)
 360 {
 361     bool ret;
 362     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 363
 364     ret = test_and_set_bit(nr, migration_bitmap);
 365
 366     if (!ret) {
 367         migration_dirty_pages++;
 368     }
 369     return ret;
 370 }
 371
 372 /* Needs iothread lock! */
 373
 374 static void migration_bitmap_sync(void)
 375 {
 376     RAMBlock *block;
 377     ram_addr_t addr;
 378     uint64_t num_dirty_pages_init = migration_dirty_pages;
 379     MigrationState *s = migrate_get_current();
 380     static int64_t start_time;
 381     static int64_t num_dirty_pages_period;
 382     int64_t end_time;
 383
 384     if (!start_time) {
 385         start_time = qemu_get_clock_ms(rt_clock);
 386     }
 387
 388     trace_migration_bitmap_sync_start();
 389     address_space_sync_dirty_bitmap(&address_space_memory);
 390
 391     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 392         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 393             if (memory_region_test_and_clear_dirty(block->mr,
 394                                                    addr, TARGET_PAGE_SIZE,
 395                                                    DIRTY_MEMORY_MIGRATION)) {
 396                 migration_bitmap_set_dirty(block->mr, addr);
 397             }
 398         }
 399     }
 400     trace_migration_bitmap_sync_end(migration_dirty_pages
 401                                     - num_dirty_pages_init);
 402     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 403     end_time = qemu_get_clock_ms(rt_clock);
 404
 405     /* more than 1 second = 1000 millisecons */
 406     if (end_time > start_time + 1000) {
 407         s->dirty_pages_rate = num_dirty_pages_period * 1000
 408             / (end_time - start_time);
 409         s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
 410         start_time = end_time;
 411         num_dirty_pages_period = 0;
 412     }
 413 }
 414
 415 /*
 416  * ram_save_block: Writes a page of memory to the stream f
 417  *
 418  * Returns:  The number of bytes written.
 419  *           0 means no dirty pages
 420  */
 421
 422 static int ram_save_block(QEMUFile *f, bool last_stage)
 423 {
 424     RAMBlock *block = last_seen_block;
 425     ram_addr_t offset = last_offset;
 426     bool complete_round = false;
 427     int bytes_sent = 0;
 428     MemoryRegion *mr;
 429     ram_addr_t current_addr;
 430
 431     if (!block)
 432         block = QTAILQ_FIRST(&ram_list.blocks);
 433
 434     while (true) {
 435         mr = block->mr;
 436         offset = migration_bitmap_find_and_reset_dirty(mr, offset);
 437         if (complete_round && block == last_seen_block &&
 438             offset >= last_offset) {
 439             break;
 440         }
 441         if (offset >= block->length) {
 442             offset = 0;
 443             block = QTAILQ_NEXT(block, next);
 444             if (!block) {
 445                 block = QTAILQ_FIRST(&ram_list.blocks);
 446                 complete_round = true;
 447                 ram_bulk_stage = false;
 448             }
 449         } else {
 450             uint8_t *p;
 451             int cont = (block == last_sent_block) ?
 452                 RAM_SAVE_FLAG_CONTINUE : 0;
 453
 454             p = memory_region_get_ram_ptr(mr) + offset;
 455
 456             /* In doubt sent page as normal */
 457             bytes_sent = -1;
 458             if (is_zero_page(p)) {
 459                 acct_info.dup_pages++;
 460                 if (!ram_bulk_stage) {
 461                     bytes_sent = save_block_hdr(f, block, offset, cont,
 462                                                 RAM_SAVE_FLAG_COMPRESS);
 463                     qemu_put_byte(f, 0);
 464                     bytes_sent++;
 465                 } else {
 466                     acct_info.skipped_pages++;
 467                     bytes_sent = 0;
 468                 }
 469             } else if (!ram_bulk_stage && migrate_use_xbzrle()) {
 470                 current_addr = block->offset + offset;
 471                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 472                                               offset, cont, last_stage);
 473                 if (!last_stage) {
 474                     p = get_cached_data(XBZRLE.cache, current_addr);
 475                 }
 476             }
 477
 478             /* XBZRLE overflow or normal page */
 479             if (bytes_sent == -1) {
 480                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 481                 qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE);
 482                 bytes_sent += TARGET_PAGE_SIZE;
 483                 acct_info.norm_pages++;
 484             }
 485
 486             /* if page is unmodified, continue to the next */
 487             if (bytes_sent > 0) {
 488                 last_sent_block = block;
 489                 break;
 490             }
 491         }
 492     }
 493     last_seen_block = block;
 494     last_offset = offset;
 495
 496     return bytes_sent;
 497 }
 498
 499 static uint64_t bytes_transferred;
 500
 501 static ram_addr_t ram_save_remaining(void)
 502 {
 503     return migration_dirty_pages;
 504 }
 505
 506 uint64_t ram_bytes_remaining(void)
 507 {
 508     return ram_save_remaining() * TARGET_PAGE_SIZE;
 509 }
 510
 511 uint64_t ram_bytes_transferred(void)
 512 {
 513     return bytes_transferred;
 514 }
 515
 516 uint64_t ram_bytes_total(void)
 517 {
 518     RAMBlock *block;
 519     uint64_t total = 0;
 520
 521     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 522         total += block->length;
 523
 524     return total;
 525 }
 526
 527 static void migration_end(void)
 528 {
 529     if (migration_bitmap) {
 530         memory_global_dirty_log_stop();
 531         g_free(migration_bitmap);
 532         migration_bitmap = NULL;
 533     }
 534
 535     if (XBZRLE.cache) {
 536         cache_fini(XBZRLE.cache);
 537         g_free(XBZRLE.cache);
 538         g_free(XBZRLE.encoded_buf);
 539         g_free(XBZRLE.current_buf);
 540         g_free(XBZRLE.decoded_buf);
 541         XBZRLE.cache = NULL;
 542     }
 543 }
 544
 545 static void ram_migration_cancel(void *opaque)
 546 {
 547     migration_end();
 548 }
 549
 550 static void reset_ram_globals(void)
 551 {
 552     last_seen_block = NULL;
 553     last_sent_block = NULL;
 554     last_offset = 0;
 555     last_version = ram_list.version;
 556     ram_bulk_stage = true;
 557 }
 558
 559 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 560
 561 static int ram_save_setup(QEMUFile *f, void *opaque)
 562 {
 563     RAMBlock *block;
 564     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 565
 566     migration_bitmap = bitmap_new(ram_pages);
 567     bitmap_set(migration_bitmap, 0, ram_pages);
 568     migration_dirty_pages = ram_pages;
 569
 570     if (migrate_use_xbzrle()) {
 571         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 572                                   TARGET_PAGE_SIZE,
 573                                   TARGET_PAGE_SIZE);
 574         if (!XBZRLE.cache) {
 575             DPRINTF("Error creating cache\n");
 576             return -1;
 577         }
 578         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 579         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 580         acct_clear();
 581     }
 582
 583     qemu_mutex_lock_iothread();
 584     qemu_mutex_lock_ramlist();
 585     bytes_transferred = 0;
 586     reset_ram_globals();
 587
 588     memory_global_dirty_log_start();
 589     migration_bitmap_sync();
 590     qemu_mutex_unlock_iothread();
 591
 592     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 593
 594     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 595         qemu_put_byte(f, strlen(block->idstr));
 596         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 597         qemu_put_be64(f, block->length);
 598     }
 599
 600     qemu_mutex_unlock_ramlist();
 601     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 602
 603     return 0;
 604 }
 605
 606 static int ram_save_iterate(QEMUFile *f, void *opaque)
 607 {
 608     int ret;
 609     int i;
 610     int64_t t0;
 611     int total_sent = 0;
 612
 613     qemu_mutex_lock_ramlist();
 614
 615     if (ram_list.version != last_version) {
 616         reset_ram_globals();
 617     }
 618
 619     t0 = qemu_get_clock_ns(rt_clock);
 620     i = 0;
 621     while ((ret = qemu_file_rate_limit(f)) == 0) {
 622         int bytes_sent;
 623
 624         bytes_sent = ram_save_block(f, false);
 625         /* no more blocks to sent */
 626         if (bytes_sent == 0) {
 627             break;
 628         }
 629         total_sent += bytes_sent;
 630         acct_info.iterations++;
 631         /* we want to check in the 1st loop, just in case it was the 1st time
 632            and we had to sync the dirty bitmap.
 633            qemu_get_clock_ns() is a bit expensive, so we only check each some
 634            iterations
 635         */
 636         if ((i & 63) == 0) {
 637             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 638             if (t1 > MAX_WAIT) {
 639                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 640                         t1, i);
 641                 break;
 642             }
 643         }
 644         i++;
 645     }
 646
 647     qemu_mutex_unlock_ramlist();
 648
 649     if (ret < 0) {
 650         bytes_transferred += total_sent;
 651         return ret;
 652     }
 653
 654     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 655     total_sent += 8;
 656     bytes_transferred += total_sent;
 657
 658     return total_sent;
 659 }
 660
 661 static int ram_save_complete(QEMUFile *f, void *opaque)
 662 {
 663     qemu_mutex_lock_ramlist();
 664     migration_bitmap_sync();
 665
 666     /* try transferring iterative blocks of memory */
 667
 668     /* flush all remaining blocks regardless of rate limiting */
 669     while (true) {
 670         int bytes_sent;
 671
 672         bytes_sent = ram_save_block(f, true);
 673         /* no more blocks to sent */
 674         if (bytes_sent == 0) {
 675             break;
 676         }
 677         bytes_transferred += bytes_sent;
 678     }
 679     migration_end();
 680
 681     qemu_mutex_unlock_ramlist();
 682     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 683
 684     return 0;
 685 }
 686
 687 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 688 {
 689     uint64_t remaining_size;
 690
 691     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 692
 693     if (remaining_size < max_size) {
 694         qemu_mutex_lock_iothread();
 695         migration_bitmap_sync();
 696         qemu_mutex_unlock_iothread();
 697         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 698     }
 699     return remaining_size;
 700 }
 701
 702 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 703 {
 704     int ret, rc = 0;
 705     unsigned int xh_len;
 706     int xh_flags;
 707
 708     if (!XBZRLE.decoded_buf) {
 709         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 710     }
 711
 712     /* extract RLE header */
 713     xh_flags = qemu_get_byte(f);
 714     xh_len = qemu_get_be16(f);
 715
 716     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 717         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 718         return -1;
 719     }
 720
 721     if (xh_len > TARGET_PAGE_SIZE) {
 722         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 723         return -1;
 724     }
 725     /* load data and decode */
 726     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 727
 728     /* decode RLE */
 729     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 730                                TARGET_PAGE_SIZE);
 731     if (ret == -1) {
 732         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 733         rc = -1;
 734     } else  if (ret > TARGET_PAGE_SIZE) {
 735         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 736                 ret, TARGET_PAGE_SIZE);
 737         abort();
 738     }
 739
 740     return rc;
 741 }
 742
 743 static inline void *host_from_stream_offset(QEMUFile *f,
 744                                             ram_addr_t offset,
 745                                             int flags)
 746 {
 747     static RAMBlock *block = NULL;
 748     char id[256];
 749     uint8_t len;
 750
 751     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 752         if (!block) {
 753             fprintf(stderr, "Ack, bad migration stream!\n");
 754             return NULL;
 755         }
 756
 757         return memory_region_get_ram_ptr(block->mr) + offset;
 758     }
 759
 760     len = qemu_get_byte(f);
 761     qemu_get_buffer(f, (uint8_t *)id, len);
 762     id[len] = 0;
 763
 764     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 765         if (!strncmp(id, block->idstr, sizeof(id)))
 766             return memory_region_get_ram_ptr(block->mr) + offset;
 767     }
 768
 769     fprintf(stderr, "Can't find block %s!\n", id);
 770     return NULL;
 771 }
 772
 773 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 774 {
 775     ram_addr_t addr;
 776     int flags, ret = 0;
 777     int error;
 778     static uint64_t seq_iter;
 779
 780     seq_iter++;
 781
 782     if (version_id < 4 || version_id > 4) {
 783         return -EINVAL;
 784     }
 785
 786     do {
 787         addr = qemu_get_be64(f);
 788
 789         flags = addr & ~TARGET_PAGE_MASK;
 790         addr &= TARGET_PAGE_MASK;
 791
 792         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 793             if (version_id == 4) {
 794                 /* Synchronize RAM block list */
 795                 char id[256];
 796                 ram_addr_t length;
 797                 ram_addr_t total_ram_bytes = addr;
 798
 799                 while (total_ram_bytes) {
 800                     RAMBlock *block;
 801                     uint8_t len;
 802
 803                     len = qemu_get_byte(f);
 804                     qemu_get_buffer(f, (uint8_t *)id, len);
 805                     id[len] = 0;
 806                     length = qemu_get_be64(f);
 807
 808                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 809                         if (!strncmp(id, block->idstr, sizeof(id))) {
 810                             if (block->length != length) {
 811                                 ret =  -EINVAL;
 812                                 goto done;
 813                             }
 814                             break;
 815                         }
 816                     }
 817
 818                     if (!block) {
 819                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 820                                 "accept migration\n", id);
 821                         ret = -EINVAL;
 822                         goto done;
 823                     }
 824
 825                     total_ram_bytes -= length;
 826                 }
 827             }
 828         }
 829
 830         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 831             void *host;
 832             uint8_t ch;
 833
 834             host = host_from_stream_offset(f, addr, flags);
 835             if (!host) {
 836                 return -EINVAL;
 837             }
 838
 839             ch = qemu_get_byte(f);
 840             memset(host, ch, TARGET_PAGE_SIZE);
 841 #ifndef _WIN32
 842             if (ch == 0 &&
 843                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 844                 getpagesize() <= TARGET_PAGE_SIZE) {
 845                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 846             }
 847 #endif
 848         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 849             void *host;
 850
 851             host = host_from_stream_offset(f, addr, flags);
 852             if (!host) {
 853                 return -EINVAL;
 854             }
 855
 856             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 857         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 858             void *host = host_from_stream_offset(f, addr, flags);
 859             if (!host) {
 860                 return -EINVAL;
 861             }
 862
 863             if (load_xbzrle(f, addr, host) < 0) {
 864                 ret = -EINVAL;
 865                 goto done;
 866             }
 867         }
 868         error = qemu_file_get_error(f);
 869         if (error) {
 870             ret = error;
 871             goto done;
 872         }
 873     } while (!(flags & RAM_SAVE_FLAG_EOS));
 874
 875 done:
 876     DPRINTF("Completed load of VM with exit code %d seq iteration "
 877             "%" PRIu64 "\n", ret, seq_iter);
 878     return ret;
 879 }
 880
 881 SaveVMHandlers savevm_ram_handlers = {
 882     .save_live_setup = ram_save_setup,
 883     .save_live_iterate = ram_save_iterate,
 884     .save_live_complete = ram_save_complete,
 885     .save_live_pending = ram_save_pending,
 886     .load_state = ram_load,
 887     .cancel = ram_migration_cancel,
 888 };
 889
 890 struct soundhw {
 891     const char *name;
 892     const char *descr;
 893     int enabled;
 894     int isa;
 895     union {
 896         int (*init_isa) (ISABus *bus);
 897         int (*init_pci) (PCIBus *bus);
 898     } init;
 899 };
 900
 901 static struct soundhw soundhw[9];
 902 static int soundhw_count;
 903
 904 void isa_register_soundhw(const char *name, const char *descr,
 905                           int (*init_isa)(ISABus *bus))
 906 {
 907     assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
 908     soundhw[soundhw_count].name = name;
 909     soundhw[soundhw_count].descr = descr;
 910     soundhw[soundhw_count].isa = 1;
 911     soundhw[soundhw_count].init.init_isa = init_isa;
 912     soundhw_count++;
 913 }
 914
 915 void pci_register_soundhw(const char *name, const char *descr,
 916                           int (*init_pci)(PCIBus *bus))
 917 {
 918     assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
 919     soundhw[soundhw_count].name = name;
 920     soundhw[soundhw_count].descr = descr;
 921     soundhw[soundhw_count].isa = 0;
 922     soundhw[soundhw_count].init.init_pci = init_pci;
 923     soundhw_count++;
 924 }
 925
 926 void select_soundhw(const char *optarg)
 927 {
 928     struct soundhw *c;
 929
 930     if (is_help_option(optarg)) {
 931     show_valid_cards:
 932
 933         if (soundhw_count) {
 934              printf("Valid sound card names (comma separated):\n");
 935              for (c = soundhw; c->name; ++c) {
 936                  printf ("%-11s %s\n", c->name, c->descr);
 937              }
 938              printf("\n-soundhw all will enable all of the above\n");
 939         } else {
 940              printf("Machine has no user-selectable audio hardware "
 941                     "(it may or may not have always-present audio hardware).\n");
 942         }
 943         exit(!is_help_option(optarg));
 944     }
 945     else {
 946         size_t l;
 947         const char *p;
 948         char *e;
 949         int bad_card = 0;
 950
 951         if (!strcmp(optarg, "all")) {
 952             for (c = soundhw; c->name; ++c) {
 953                 c->enabled = 1;
 954             }
 955             return;
 956         }
 957
 958         p = optarg;
 959         while (*p) {
 960             e = strchr(p, ',');
 961             l = !e ? strlen(p) : (size_t) (e - p);
 962
 963             for (c = soundhw; c->name; ++c) {
 964                 if (!strncmp(c->name, p, l) && !c->name[l]) {
 965                     c->enabled = 1;
 966                     break;
 967                 }
 968             }
 969
 970             if (!c->name) {
 971                 if (l > 80) {
 972                     fprintf(stderr,
 973                             "Unknown sound card name (too big to show)\n");
 974                 }
 975                 else {
 976                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
 977                             (int) l, p);
 978                 }
 979                 bad_card = 1;
 980             }
 981             p += l + (e != NULL);
 982         }
 983
 984         if (bad_card) {
 985             goto show_valid_cards;
 986         }
 987     }
 988 }
 989
 990 void audio_init(void)
 991 {
 992     struct soundhw *c;
 993     ISABus *isa_bus = (ISABus *) object_resolve_path_type("", TYPE_ISA_BUS, NULL);
 994     PCIBus *pci_bus = (PCIBus *) object_resolve_path_type("", TYPE_PCI_BUS, NULL);
 995
 996     for (c = soundhw; c->name; ++c) {
 997         if (c->enabled) {
 998             if (c->isa) {
 999                 if (!isa_bus) {
1000                     fprintf(stderr, "ISA bus not available for %s\n", c->name);
1001                     exit(1);
1002                 }
1003                 c->init.init_isa(isa_bus);
1004             } else {
1005                 if (!pci_bus) {
1006                     fprintf(stderr, "PCI bus not available for %s\n", c->name);
1007                     exit(1);
1008                 }
1009                 c->init.init_pci(pci_bus);
1010             }
1011         }
1012     }
1013 }
1014
1015 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1016 {
1017     int ret;
1018
1019     if (strlen(str) != 36) {
1020         return -1;
1021     }
1022
1023     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1024                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1025                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1026                  &uuid[15]);
1027
1028     if (ret != 16) {
1029         return -1;
1030     }
1031 #ifdef TARGET_I386
1032     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), uuid, 16);
1033 #endif
1034     return 0;
1035 }
1036
1037 void do_acpitable_option(const QemuOpts *opts)
1038 {
1039 #ifdef TARGET_I386
1040     Error *err = NULL;
1041
1042     acpi_table_add(opts, &err);
1043     if (err) {
1044         fprintf(stderr, "Wrong acpi table provided: %s\n",
1045                 error_get_pretty(err));
1046         error_free(err);
1047         exit(1);
1048     }
1049 #endif
1050 }
1051
1052 void do_smbios_option(const char *optarg)
1053 {
1054 #ifdef TARGET_I386
1055     if (smbios_entry_add(optarg) < 0) {
1056         exit(1);
1057     }
1058 #endif
1059 }
1060
1061 void cpudef_init(void)
1062 {
1063 #if defined(cpudef_setup)
1064     cpudef_setup(); /* parse cpu definitions in target config file */
1065 #endif
1066 }
1067
1068 int tcg_available(void)
1069 {
1070     return 1;
1071 }
1072
1073 int kvm_available(void)
1074 {
1075 #ifdef CONFIG_KVM
1076     return 1;
1077 #else
1078     return 0;
1079 #endif
1080 }
1081
1082 int xen_available(void)
1083 {
1084 #ifdef CONFIG_XEN
1085     return 1;
1086 #else
1087     return 0;
1088 #endif
1089 }
1090
1091
1092 TargetInfo *qmp_query_target(Error **errp)
1093 {
1094     TargetInfo *info = g_malloc0(sizeof(*info));
1095
1096     info->arch = g_strdup(TARGET_NAME);
1097
1098     return info;
1099 }