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 = 32;
  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                 bytes_sent = save_block_hdr(f, block, offset, cont,
 461                                             RAM_SAVE_FLAG_COMPRESS);
 462                 qemu_put_byte(f, 0);
 463                 bytes_sent++;
 464             } else if (!ram_bulk_stage && migrate_use_xbzrle()) {
 465                 current_addr = block->offset + offset;
 466                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 467                                               offset, cont, last_stage);
 468                 if (!last_stage) {
 469                     p = get_cached_data(XBZRLE.cache, current_addr);
 470                 }
 471             }
 472
 473             /* XBZRLE overflow or normal page */
 474             if (bytes_sent == -1) {
 475                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 476                 qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE);
 477                 bytes_sent += TARGET_PAGE_SIZE;
 478                 acct_info.norm_pages++;
 479             }
 480
 481             /* if page is unmodified, continue to the next */
 482             if (bytes_sent > 0) {
 483                 last_sent_block = block;
 484                 break;
 485             }
 486         }
 487     }
 488     last_seen_block = block;
 489     last_offset = offset;
 490
 491     return bytes_sent;
 492 }
 493
 494 static uint64_t bytes_transferred;
 495
 496 void acct_update_position(QEMUFile *f, size_t size, bool zero)
 497 {
 498     uint64_t pages = size / TARGET_PAGE_SIZE;
 499     if (zero) {
 500         acct_info.dup_pages += pages;
 501     } else {
 502         acct_info.norm_pages += pages;
 503         bytes_transferred += size;
 504         qemu_update_position(f, size);
 505     }
 506 }
 507
 508 static ram_addr_t ram_save_remaining(void)
 509 {
 510     return migration_dirty_pages;
 511 }
 512
 513 uint64_t ram_bytes_remaining(void)
 514 {
 515     return ram_save_remaining() * TARGET_PAGE_SIZE;
 516 }
 517
 518 uint64_t ram_bytes_transferred(void)
 519 {
 520     return bytes_transferred;
 521 }
 522
 523 uint64_t ram_bytes_total(void)
 524 {
 525     RAMBlock *block;
 526     uint64_t total = 0;
 527
 528     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 529         total += block->length;
 530
 531     return total;
 532 }
 533
 534 static void migration_end(void)
 535 {
 536     if (migration_bitmap) {
 537         memory_global_dirty_log_stop();
 538         g_free(migration_bitmap);
 539         migration_bitmap = NULL;
 540     }
 541
 542     if (XBZRLE.cache) {
 543         cache_fini(XBZRLE.cache);
 544         g_free(XBZRLE.cache);
 545         g_free(XBZRLE.encoded_buf);
 546         g_free(XBZRLE.current_buf);
 547         g_free(XBZRLE.decoded_buf);
 548         XBZRLE.cache = NULL;
 549     }
 550 }
 551
 552 static void ram_migration_cancel(void *opaque)
 553 {
 554     migration_end();
 555 }
 556
 557 static void reset_ram_globals(void)
 558 {
 559     last_seen_block = NULL;
 560     last_sent_block = NULL;
 561     last_offset = 0;
 562     last_version = ram_list.version;
 563     ram_bulk_stage = true;
 564 }
 565
 566 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 567
 568 static int ram_save_setup(QEMUFile *f, void *opaque)
 569 {
 570     RAMBlock *block;
 571     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 572
 573     migration_bitmap = bitmap_new(ram_pages);
 574     bitmap_set(migration_bitmap, 0, ram_pages);
 575     migration_dirty_pages = ram_pages;
 576
 577     if (migrate_use_xbzrle()) {
 578         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 579                                   TARGET_PAGE_SIZE,
 580                                   TARGET_PAGE_SIZE);
 581         if (!XBZRLE.cache) {
 582             DPRINTF("Error creating cache\n");
 583             return -1;
 584         }
 585         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 586         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 587         acct_clear();
 588     }
 589
 590     qemu_mutex_lock_iothread();
 591     qemu_mutex_lock_ramlist();
 592     bytes_transferred = 0;
 593     reset_ram_globals();
 594
 595     memory_global_dirty_log_start();
 596     migration_bitmap_sync();
 597     qemu_mutex_unlock_iothread();
 598
 599     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 600
 601     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 602         qemu_put_byte(f, strlen(block->idstr));
 603         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 604         qemu_put_be64(f, block->length);
 605     }
 606
 607     qemu_mutex_unlock_ramlist();
 608     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 609
 610     return 0;
 611 }
 612
 613 static int ram_save_iterate(QEMUFile *f, void *opaque)
 614 {
 615     int ret;
 616     int i;
 617     int64_t t0;
 618     int total_sent = 0;
 619
 620     qemu_mutex_lock_ramlist();
 621
 622     if (ram_list.version != last_version) {
 623         reset_ram_globals();
 624     }
 625
 626     t0 = qemu_get_clock_ns(rt_clock);
 627     i = 0;
 628     while ((ret = qemu_file_rate_limit(f)) == 0) {
 629         int bytes_sent;
 630
 631         bytes_sent = ram_save_block(f, false);
 632         /* no more blocks to sent */
 633         if (bytes_sent == 0) {
 634             break;
 635         }
 636         total_sent += bytes_sent;
 637         acct_info.iterations++;
 638         /* we want to check in the 1st loop, just in case it was the 1st time
 639            and we had to sync the dirty bitmap.
 640            qemu_get_clock_ns() is a bit expensive, so we only check each some
 641            iterations
 642         */
 643         if ((i & 63) == 0) {
 644             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 645             if (t1 > MAX_WAIT) {
 646                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 647                         t1, i);
 648                 break;
 649             }
 650         }
 651         i++;
 652     }
 653
 654     qemu_mutex_unlock_ramlist();
 655
 656     if (ret < 0) {
 657         bytes_transferred += total_sent;
 658         return ret;
 659     }
 660
 661     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 662     total_sent += 8;
 663     bytes_transferred += total_sent;
 664
 665     return total_sent;
 666 }
 667
 668 static int ram_save_complete(QEMUFile *f, void *opaque)
 669 {
 670     qemu_mutex_lock_ramlist();
 671     migration_bitmap_sync();
 672
 673     /* try transferring iterative blocks of memory */
 674
 675     /* flush all remaining blocks regardless of rate limiting */
 676     while (true) {
 677         int bytes_sent;
 678
 679         bytes_sent = ram_save_block(f, true);
 680         /* no more blocks to sent */
 681         if (bytes_sent == 0) {
 682             break;
 683         }
 684         bytes_transferred += bytes_sent;
 685     }
 686     migration_end();
 687
 688     qemu_mutex_unlock_ramlist();
 689     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 690
 691     return 0;
 692 }
 693
 694 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 695 {
 696     uint64_t remaining_size;
 697
 698     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 699
 700     if (remaining_size < max_size) {
 701         qemu_mutex_lock_iothread();
 702         migration_bitmap_sync();
 703         qemu_mutex_unlock_iothread();
 704         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 705     }
 706     return remaining_size;
 707 }
 708
 709 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 710 {
 711     int ret, rc = 0;
 712     unsigned int xh_len;
 713     int xh_flags;
 714
 715     if (!XBZRLE.decoded_buf) {
 716         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 717     }
 718
 719     /* extract RLE header */
 720     xh_flags = qemu_get_byte(f);
 721     xh_len = qemu_get_be16(f);
 722
 723     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 724         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 725         return -1;
 726     }
 727
 728     if (xh_len > TARGET_PAGE_SIZE) {
 729         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 730         return -1;
 731     }
 732     /* load data and decode */
 733     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 734
 735     /* decode RLE */
 736     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 737                                TARGET_PAGE_SIZE);
 738     if (ret == -1) {
 739         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 740         rc = -1;
 741     } else  if (ret > TARGET_PAGE_SIZE) {
 742         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 743                 ret, TARGET_PAGE_SIZE);
 744         abort();
 745     }
 746
 747     return rc;
 748 }
 749
 750 static inline void *host_from_stream_offset(QEMUFile *f,
 751                                             ram_addr_t offset,
 752                                             int flags)
 753 {
 754     static RAMBlock *block = NULL;
 755     char id[256];
 756     uint8_t len;
 757
 758     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 759         if (!block) {
 760             fprintf(stderr, "Ack, bad migration stream!\n");
 761             return NULL;
 762         }
 763
 764         return memory_region_get_ram_ptr(block->mr) + offset;
 765     }
 766
 767     len = qemu_get_byte(f);
 768     qemu_get_buffer(f, (uint8_t *)id, len);
 769     id[len] = 0;
 770
 771     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 772         if (!strncmp(id, block->idstr, sizeof(id)))
 773             return memory_region_get_ram_ptr(block->mr) + offset;
 774     }
 775
 776     fprintf(stderr, "Can't find block %s!\n", id);
 777     return NULL;
 778 }
 779
 780 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 781 {
 782     ram_addr_t addr;
 783     int flags, ret = 0;
 784     int error;
 785     static uint64_t seq_iter;
 786
 787     seq_iter++;
 788
 789     if (version_id < 4 || version_id > 4) {
 790         return -EINVAL;
 791     }
 792
 793     do {
 794         addr = qemu_get_be64(f);
 795
 796         flags = addr & ~TARGET_PAGE_MASK;
 797         addr &= TARGET_PAGE_MASK;
 798
 799         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 800             if (version_id == 4) {
 801                 /* Synchronize RAM block list */
 802                 char id[256];
 803                 ram_addr_t length;
 804                 ram_addr_t total_ram_bytes = addr;
 805
 806                 while (total_ram_bytes) {
 807                     RAMBlock *block;
 808                     uint8_t len;
 809
 810                     len = qemu_get_byte(f);
 811                     qemu_get_buffer(f, (uint8_t *)id, len);
 812                     id[len] = 0;
 813                     length = qemu_get_be64(f);
 814
 815                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 816                         if (!strncmp(id, block->idstr, sizeof(id))) {
 817                             if (block->length != length) {
 818                                 fprintf(stderr,
 819                                         "Length mismatch: %s: " RAM_ADDR_FMT
 820                                         " in != " RAM_ADDR_FMT "\n", id, length,
 821                                         block->length);
 822                                 ret =  -EINVAL;
 823                                 goto done;
 824                             }
 825                             break;
 826                         }
 827                     }
 828
 829                     if (!block) {
 830                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 831                                 "accept migration\n", id);
 832                         ret = -EINVAL;
 833                         goto done;
 834                     }
 835
 836                     total_ram_bytes -= length;
 837                 }
 838             }
 839         }
 840
 841         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 842             void *host;
 843             uint8_t ch;
 844
 845             host = host_from_stream_offset(f, addr, flags);
 846             if (!host) {
 847                 return -EINVAL;
 848             }
 849
 850             ch = qemu_get_byte(f);
 851             if (ch != 0 || !is_zero_page(host)) {
 852                 memset(host, ch, TARGET_PAGE_SIZE);
 853 #ifndef _WIN32
 854                 if (ch == 0 &&
 855                     (!kvm_enabled() || kvm_has_sync_mmu()) &&
 856                     getpagesize() <= TARGET_PAGE_SIZE) {
 857                     qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 858                 }
 859 #endif
 860             }
 861         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 862             void *host;
 863
 864             host = host_from_stream_offset(f, addr, flags);
 865             if (!host) {
 866                 return -EINVAL;
 867             }
 868
 869             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 870         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 871             void *host = host_from_stream_offset(f, addr, flags);
 872             if (!host) {
 873                 return -EINVAL;
 874             }
 875
 876             if (load_xbzrle(f, addr, host) < 0) {
 877                 ret = -EINVAL;
 878                 goto done;
 879             }
 880         }
 881         error = qemu_file_get_error(f);
 882         if (error) {
 883             ret = error;
 884             goto done;
 885         }
 886     } while (!(flags & RAM_SAVE_FLAG_EOS));
 887
 888 done:
 889     DPRINTF("Completed load of VM with exit code %d seq iteration "
 890             "%" PRIu64 "\n", ret, seq_iter);
 891     return ret;
 892 }
 893
 894 SaveVMHandlers savevm_ram_handlers = {
 895     .save_live_setup = ram_save_setup,
 896     .save_live_iterate = ram_save_iterate,
 897     .save_live_complete = ram_save_complete,
 898     .save_live_pending = ram_save_pending,
 899     .load_state = ram_load,
 900     .cancel = ram_migration_cancel,
 901 };
 902
 903 struct soundhw {
 904     const char *name;
 905     const char *descr;
 906     int enabled;
 907     int isa;
 908     union {
 909         int (*init_isa) (ISABus *bus);
 910         int (*init_pci) (PCIBus *bus);
 911     } init;
 912 };
 913
 914 static struct soundhw soundhw[9];
 915 static int soundhw_count;
 916
 917 void isa_register_soundhw(const char *name, const char *descr,
 918                           int (*init_isa)(ISABus *bus))
 919 {
 920     assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
 921     soundhw[soundhw_count].name = name;
 922     soundhw[soundhw_count].descr = descr;
 923     soundhw[soundhw_count].isa = 1;
 924     soundhw[soundhw_count].init.init_isa = init_isa;
 925     soundhw_count++;
 926 }
 927
 928 void pci_register_soundhw(const char *name, const char *descr,
 929                           int (*init_pci)(PCIBus *bus))
 930 {
 931     assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
 932     soundhw[soundhw_count].name = name;
 933     soundhw[soundhw_count].descr = descr;
 934     soundhw[soundhw_count].isa = 0;
 935     soundhw[soundhw_count].init.init_pci = init_pci;
 936     soundhw_count++;
 937 }
 938
 939 void select_soundhw(const char *optarg)
 940 {
 941     struct soundhw *c;
 942
 943     if (is_help_option(optarg)) {
 944     show_valid_cards:
 945
 946         if (soundhw_count) {
 947              printf("Valid sound card names (comma separated):\n");
 948              for (c = soundhw; c->name; ++c) {
 949                  printf ("%-11s %s\n", c->name, c->descr);
 950              }
 951              printf("\n-soundhw all will enable all of the above\n");
 952         } else {
 953              printf("Machine has no user-selectable audio hardware "
 954                     "(it may or may not have always-present audio hardware).\n");
 955         }
 956         exit(!is_help_option(optarg));
 957     }
 958     else {
 959         size_t l;
 960         const char *p;
 961         char *e;
 962         int bad_card = 0;
 963
 964         if (!strcmp(optarg, "all")) {
 965             for (c = soundhw; c->name; ++c) {
 966                 c->enabled = 1;
 967             }
 968             return;
 969         }
 970
 971         p = optarg;
 972         while (*p) {
 973             e = strchr(p, ',');
 974             l = !e ? strlen(p) : (size_t) (e - p);
 975
 976             for (c = soundhw; c->name; ++c) {
 977                 if (!strncmp(c->name, p, l) && !c->name[l]) {
 978                     c->enabled = 1;
 979                     break;
 980                 }
 981             }
 982
 983             if (!c->name) {
 984                 if (l > 80) {
 985                     fprintf(stderr,
 986                             "Unknown sound card name (too big to show)\n");
 987                 }
 988                 else {
 989                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
 990                             (int) l, p);
 991                 }
 992                 bad_card = 1;
 993             }
 994             p += l + (e != NULL);
 995         }
 996
 997         if (bad_card) {
 998             goto show_valid_cards;
 999         }
1000     }
1001 }
1002
1003 void audio_init(void)
1004 {
1005     struct soundhw *c;
1006     ISABus *isa_bus = (ISABus *) object_resolve_path_type("", TYPE_ISA_BUS, NULL);
1007     PCIBus *pci_bus = (PCIBus *) object_resolve_path_type("", TYPE_PCI_BUS, NULL);
1008
1009     for (c = soundhw; c->name; ++c) {
1010         if (c->enabled) {
1011             if (c->isa) {
1012                 if (!isa_bus) {
1013                     fprintf(stderr, "ISA bus not available for %s\n", c->name);
1014                     exit(1);
1015                 }
1016                 c->init.init_isa(isa_bus);
1017             } else {
1018                 if (!pci_bus) {
1019                     fprintf(stderr, "PCI bus not available for %s\n", c->name);
1020                     exit(1);
1021                 }
1022                 c->init.init_pci(pci_bus);
1023             }
1024         }
1025     }
1026 }
1027
1028 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1029 {
1030     int ret;
1031
1032     if (strlen(str) != 36) {
1033         return -1;
1034     }
1035
1036     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1037                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1038                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1039                  &uuid[15]);
1040
1041     if (ret != 16) {
1042         return -1;
1043     }
1044 #ifdef TARGET_I386
1045     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), uuid, 16);
1046 #endif
1047     return 0;
1048 }
1049
1050 void do_acpitable_option(const QemuOpts *opts)
1051 {
1052 #ifdef TARGET_I386
1053     Error *err = NULL;
1054
1055     acpi_table_add(opts, &err);
1056     if (err) {
1057         fprintf(stderr, "Wrong acpi table provided: %s\n",
1058                 error_get_pretty(err));
1059         error_free(err);
1060         exit(1);
1061     }
1062 #endif
1063 }
1064
1065 void do_smbios_option(const char *optarg)
1066 {
1067 #ifdef TARGET_I386
1068     if (smbios_entry_add(optarg) < 0) {
1069         exit(1);
1070     }
1071 #endif
1072 }
1073
1074 void cpudef_init(void)
1075 {
1076 #if defined(cpudef_setup)
1077     cpudef_setup(); /* parse cpu definitions in target config file */
1078 #endif
1079 }
1080
1081 int tcg_available(void)
1082 {
1083     return 1;
1084 }
1085
1086 int kvm_available(void)
1087 {
1088 #ifdef CONFIG_KVM
1089     return 1;
1090 #else
1091     return 0;
1092 #endif
1093 }
1094
1095 int xen_available(void)
1096 {
1097 #ifdef CONFIG_XEN
1098     return 1;
1099 #else
1100     return 0;
1101 #endif
1102 }
1103
1104
1105 TargetInfo *qmp_query_target(Error **errp)
1106 {
1107     TargetInfo *info = g_malloc0(sizeof(*info));
1108
1109     info->arch = g_strdup(TARGET_NAME);
1110
1111     return info;
1112 }