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
 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_ARCH ".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 = find_next_bit(migration_bitmap, size, nr);
 344
 345     if (next < size) {
 346         clear_bit(next, migration_bitmap);
 347         migration_dirty_pages--;
 348     }
 349     return (next - base) << TARGET_PAGE_BITS;
 350 }
 351
 352 static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
 353                                               ram_addr_t offset)
 354 {
 355     bool ret;
 356     int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
 357
 358     ret = test_and_set_bit(nr, migration_bitmap);
 359
 360     if (!ret) {
 361         migration_dirty_pages++;
 362     }
 363     return ret;
 364 }
 365
 366 /* Needs iothread lock! */
 367
 368 static void migration_bitmap_sync(void)
 369 {
 370     RAMBlock *block;
 371     ram_addr_t addr;
 372     uint64_t num_dirty_pages_init = migration_dirty_pages;
 373     MigrationState *s = migrate_get_current();
 374     static int64_t start_time;
 375     static int64_t num_dirty_pages_period;
 376     int64_t end_time;
 377
 378     if (!start_time) {
 379         start_time = qemu_get_clock_ms(rt_clock);
 380     }
 381
 382     trace_migration_bitmap_sync_start();
 383     memory_global_sync_dirty_bitmap(get_system_memory());
 384
 385     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 386         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 387             if (memory_region_test_and_clear_dirty(block->mr,
 388                                                    addr, TARGET_PAGE_SIZE,
 389                                                    DIRTY_MEMORY_MIGRATION)) {
 390                 migration_bitmap_set_dirty(block->mr, addr);
 391             }
 392         }
 393     }
 394     trace_migration_bitmap_sync_end(migration_dirty_pages
 395                                     - num_dirty_pages_init);
 396     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 397     end_time = qemu_get_clock_ms(rt_clock);
 398
 399     /* more than 1 second = 1000 millisecons */
 400     if (end_time > start_time + 1000) {
 401         s->dirty_pages_rate = num_dirty_pages_period * 1000
 402             / (end_time - start_time);
 403         s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
 404         start_time = end_time;
 405         num_dirty_pages_period = 0;
 406     }
 407 }
 408
 409 /*
 410  * ram_save_block: Writes a page of memory to the stream f
 411  *
 412  * Returns:  The number of bytes written.
 413  *           0 means no dirty pages
 414  */
 415
 416 static int ram_save_block(QEMUFile *f, bool last_stage)
 417 {
 418     RAMBlock *block = last_seen_block;
 419     ram_addr_t offset = last_offset;
 420     bool complete_round = false;
 421     int bytes_sent = 0;
 422     MemoryRegion *mr;
 423     ram_addr_t current_addr;
 424
 425     if (!block)
 426         block = QTAILQ_FIRST(&ram_list.blocks);
 427
 428     while (true) {
 429         mr = block->mr;
 430         offset = migration_bitmap_find_and_reset_dirty(mr, offset);
 431         if (complete_round && block == last_seen_block &&
 432             offset >= last_offset) {
 433             break;
 434         }
 435         if (offset >= block->length) {
 436             offset = 0;
 437             block = QTAILQ_NEXT(block, next);
 438             if (!block) {
 439                 block = QTAILQ_FIRST(&ram_list.blocks);
 440                 complete_round = true;
 441                 ram_bulk_stage = false;
 442             }
 443         } else {
 444             uint8_t *p;
 445             int cont = (block == last_sent_block) ?
 446                 RAM_SAVE_FLAG_CONTINUE : 0;
 447
 448             p = memory_region_get_ram_ptr(mr) + offset;
 449
 450             /* In doubt sent page as normal */
 451             bytes_sent = -1;
 452             if (is_zero_page(p)) {
 453                 acct_info.dup_pages++;
 454                 if (!ram_bulk_stage) {
 455                     bytes_sent = save_block_hdr(f, block, offset, cont,
 456                                                 RAM_SAVE_FLAG_COMPRESS);
 457                     qemu_put_byte(f, 0);
 458                     bytes_sent++;
 459                 } else {
 460                     acct_info.skipped_pages++;
 461                     bytes_sent = 0;
 462                 }
 463             } else if (migrate_use_xbzrle()) {
 464                 current_addr = block->offset + offset;
 465                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 466                                               offset, cont, last_stage);
 467                 if (!last_stage) {
 468                     p = get_cached_data(XBZRLE.cache, current_addr);
 469                 }
 470             }
 471
 472             /* XBZRLE overflow or normal page */
 473             if (bytes_sent == -1) {
 474                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 475                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 476                 bytes_sent += TARGET_PAGE_SIZE;
 477                 acct_info.norm_pages++;
 478             }
 479
 480             /* if page is unmodified, continue to the next */
 481             if (bytes_sent > 0) {
 482                 last_sent_block = block;
 483                 break;
 484             }
 485         }
 486     }
 487     last_seen_block = block;
 488     last_offset = offset;
 489
 490     return bytes_sent;
 491 }
 492
 493 static uint64_t bytes_transferred;
 494
 495 static ram_addr_t ram_save_remaining(void)
 496 {
 497     return migration_dirty_pages;
 498 }
 499
 500 uint64_t ram_bytes_remaining(void)
 501 {
 502     return ram_save_remaining() * TARGET_PAGE_SIZE;
 503 }
 504
 505 uint64_t ram_bytes_transferred(void)
 506 {
 507     return bytes_transferred;
 508 }
 509
 510 uint64_t ram_bytes_total(void)
 511 {
 512     RAMBlock *block;
 513     uint64_t total = 0;
 514
 515     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 516         total += block->length;
 517
 518     return total;
 519 }
 520
 521 static void migration_end(void)
 522 {
 523     if (migration_bitmap) {
 524         memory_global_dirty_log_stop();
 525         g_free(migration_bitmap);
 526         migration_bitmap = NULL;
 527     }
 528
 529     if (XBZRLE.cache) {
 530         cache_fini(XBZRLE.cache);
 531         g_free(XBZRLE.cache);
 532         g_free(XBZRLE.encoded_buf);
 533         g_free(XBZRLE.current_buf);
 534         g_free(XBZRLE.decoded_buf);
 535         XBZRLE.cache = NULL;
 536     }
 537 }
 538
 539 static void ram_migration_cancel(void *opaque)
 540 {
 541     migration_end();
 542 }
 543
 544 static void reset_ram_globals(void)
 545 {
 546     last_seen_block = NULL;
 547     last_sent_block = NULL;
 548     last_offset = 0;
 549     last_version = ram_list.version;
 550     ram_bulk_stage = true;
 551 }
 552
 553 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 554
 555 static int ram_save_setup(QEMUFile *f, void *opaque)
 556 {
 557     RAMBlock *block;
 558     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 559
 560     migration_bitmap = bitmap_new(ram_pages);
 561     bitmap_set(migration_bitmap, 0, ram_pages);
 562     migration_dirty_pages = ram_pages;
 563
 564     if (migrate_use_xbzrle()) {
 565         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 566                                   TARGET_PAGE_SIZE,
 567                                   TARGET_PAGE_SIZE);
 568         if (!XBZRLE.cache) {
 569             DPRINTF("Error creating cache\n");
 570             return -1;
 571         }
 572         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 573         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 574         acct_clear();
 575     }
 576
 577     qemu_mutex_lock_iothread();
 578     qemu_mutex_lock_ramlist();
 579     bytes_transferred = 0;
 580     reset_ram_globals();
 581
 582     memory_global_dirty_log_start();
 583     migration_bitmap_sync();
 584     qemu_mutex_unlock_iothread();
 585
 586     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 587
 588     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 589         qemu_put_byte(f, strlen(block->idstr));
 590         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 591         qemu_put_be64(f, block->length);
 592     }
 593
 594     qemu_mutex_unlock_ramlist();
 595     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 596
 597     return 0;
 598 }
 599
 600 static int ram_save_iterate(QEMUFile *f, void *opaque)
 601 {
 602     int ret;
 603     int i;
 604     int64_t t0;
 605     int total_sent = 0;
 606
 607     qemu_mutex_lock_ramlist();
 608
 609     if (ram_list.version != last_version) {
 610         reset_ram_globals();
 611     }
 612
 613     t0 = qemu_get_clock_ns(rt_clock);
 614     i = 0;
 615     while ((ret = qemu_file_rate_limit(f)) == 0) {
 616         int bytes_sent;
 617
 618         bytes_sent = ram_save_block(f, false);
 619         /* no more blocks to sent */
 620         if (bytes_sent == 0) {
 621             break;
 622         }
 623         total_sent += bytes_sent;
 624         acct_info.iterations++;
 625         /* we want to check in the 1st loop, just in case it was the 1st time
 626            and we had to sync the dirty bitmap.
 627            qemu_get_clock_ns() is a bit expensive, so we only check each some
 628            iterations
 629         */
 630         if ((i & 63) == 0) {
 631             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 632             if (t1 > MAX_WAIT) {
 633                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 634                         t1, i);
 635                 break;
 636             }
 637         }
 638         i++;
 639     }
 640
 641     qemu_mutex_unlock_ramlist();
 642
 643     if (ret < 0) {
 644         bytes_transferred += total_sent;
 645         return ret;
 646     }
 647
 648     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 649     total_sent += 8;
 650     bytes_transferred += total_sent;
 651
 652     return total_sent;
 653 }
 654
 655 static int ram_save_complete(QEMUFile *f, void *opaque)
 656 {
 657     qemu_mutex_lock_ramlist();
 658     migration_bitmap_sync();
 659
 660     /* try transferring iterative blocks of memory */
 661
 662     /* flush all remaining blocks regardless of rate limiting */
 663     while (true) {
 664         int bytes_sent;
 665
 666         bytes_sent = ram_save_block(f, true);
 667         /* no more blocks to sent */
 668         if (bytes_sent == 0) {
 669             break;
 670         }
 671         bytes_transferred += bytes_sent;
 672     }
 673     migration_end();
 674
 675     qemu_mutex_unlock_ramlist();
 676     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 677
 678     return 0;
 679 }
 680
 681 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 682 {
 683     uint64_t remaining_size;
 684
 685     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 686
 687     if (remaining_size < max_size) {
 688         qemu_mutex_lock_iothread();
 689         migration_bitmap_sync();
 690         qemu_mutex_unlock_iothread();
 691         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 692     }
 693     return remaining_size;
 694 }
 695
 696 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 697 {
 698     int ret, rc = 0;
 699     unsigned int xh_len;
 700     int xh_flags;
 701
 702     if (!XBZRLE.decoded_buf) {
 703         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 704     }
 705
 706     /* extract RLE header */
 707     xh_flags = qemu_get_byte(f);
 708     xh_len = qemu_get_be16(f);
 709
 710     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 711         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 712         return -1;
 713     }
 714
 715     if (xh_len > TARGET_PAGE_SIZE) {
 716         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 717         return -1;
 718     }
 719     /* load data and decode */
 720     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 721
 722     /* decode RLE */
 723     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 724                                TARGET_PAGE_SIZE);
 725     if (ret == -1) {
 726         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 727         rc = -1;
 728     } else  if (ret > TARGET_PAGE_SIZE) {
 729         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 730                 ret, TARGET_PAGE_SIZE);
 731         abort();
 732     }
 733
 734     return rc;
 735 }
 736
 737 static inline void *host_from_stream_offset(QEMUFile *f,
 738                                             ram_addr_t offset,
 739                                             int flags)
 740 {
 741     static RAMBlock *block = NULL;
 742     char id[256];
 743     uint8_t len;
 744
 745     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 746         if (!block) {
 747             fprintf(stderr, "Ack, bad migration stream!\n");
 748             return NULL;
 749         }
 750
 751         return memory_region_get_ram_ptr(block->mr) + offset;
 752     }
 753
 754     len = qemu_get_byte(f);
 755     qemu_get_buffer(f, (uint8_t *)id, len);
 756     id[len] = 0;
 757
 758     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 759         if (!strncmp(id, block->idstr, sizeof(id)))
 760             return memory_region_get_ram_ptr(block->mr) + offset;
 761     }
 762
 763     fprintf(stderr, "Can't find block %s!\n", id);
 764     return NULL;
 765 }
 766
 767 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 768 {
 769     ram_addr_t addr;
 770     int flags, ret = 0;
 771     int error;
 772     static uint64_t seq_iter;
 773
 774     seq_iter++;
 775
 776     if (version_id < 4 || version_id > 4) {
 777         return -EINVAL;
 778     }
 779
 780     do {
 781         addr = qemu_get_be64(f);
 782
 783         flags = addr & ~TARGET_PAGE_MASK;
 784         addr &= TARGET_PAGE_MASK;
 785
 786         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 787             if (version_id == 4) {
 788                 /* Synchronize RAM block list */
 789                 char id[256];
 790                 ram_addr_t length;
 791                 ram_addr_t total_ram_bytes = addr;
 792
 793                 while (total_ram_bytes) {
 794                     RAMBlock *block;
 795                     uint8_t len;
 796
 797                     len = qemu_get_byte(f);
 798                     qemu_get_buffer(f, (uint8_t *)id, len);
 799                     id[len] = 0;
 800                     length = qemu_get_be64(f);
 801
 802                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 803                         if (!strncmp(id, block->idstr, sizeof(id))) {
 804                             if (block->length != length) {
 805                                 ret =  -EINVAL;
 806                                 goto done;
 807                             }
 808                             break;
 809                         }
 810                     }
 811
 812                     if (!block) {
 813                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 814                                 "accept migration\n", id);
 815                         ret = -EINVAL;
 816                         goto done;
 817                     }
 818
 819                     total_ram_bytes -= length;
 820                 }
 821             }
 822         }
 823
 824         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 825             void *host;
 826             uint8_t ch;
 827
 828             host = host_from_stream_offset(f, addr, flags);
 829             if (!host) {
 830                 return -EINVAL;
 831             }
 832
 833             ch = qemu_get_byte(f);
 834             memset(host, ch, TARGET_PAGE_SIZE);
 835 #ifndef _WIN32
 836             if (ch == 0 &&
 837                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 838                 getpagesize() <= TARGET_PAGE_SIZE) {
 839                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 840             }
 841 #endif
 842         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 843             void *host;
 844
 845             host = host_from_stream_offset(f, addr, flags);
 846             if (!host) {
 847                 return -EINVAL;
 848             }
 849
 850             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 851         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 852             void *host = host_from_stream_offset(f, addr, flags);
 853             if (!host) {
 854                 return -EINVAL;
 855             }
 856
 857             if (load_xbzrle(f, addr, host) < 0) {
 858                 ret = -EINVAL;
 859                 goto done;
 860             }
 861         }
 862         error = qemu_file_get_error(f);
 863         if (error) {
 864             ret = error;
 865             goto done;
 866         }
 867     } while (!(flags & RAM_SAVE_FLAG_EOS));
 868
 869 done:
 870     DPRINTF("Completed load of VM with exit code %d seq iteration "
 871             "%" PRIu64 "\n", ret, seq_iter);
 872     return ret;
 873 }
 874
 875 SaveVMHandlers savevm_ram_handlers = {
 876     .save_live_setup = ram_save_setup,
 877     .save_live_iterate = ram_save_iterate,
 878     .save_live_complete = ram_save_complete,
 879     .save_live_pending = ram_save_pending,
 880     .load_state = ram_load,
 881     .cancel = ram_migration_cancel,
 882 };
 883
 884 #ifdef HAS_AUDIO
 885 struct soundhw {
 886     const char *name;
 887     const char *descr;
 888     int enabled;
 889     int isa;
 890     union {
 891         int (*init_isa) (ISABus *bus);
 892         int (*init_pci) (PCIBus *bus);
 893     } init;
 894 };
 895
 896 static struct soundhw soundhw[] = {
 897 #ifdef HAS_AUDIO_CHOICE
 898 #ifdef CONFIG_PCSPK
 899     {
 900         "pcspk",
 901         "PC speaker",
 902         0,
 903         1,
 904         { .init_isa = pcspk_audio_init }
 905     },
 906 #endif
 907
 908 #ifdef CONFIG_SB16
 909     {
 910         "sb16",
 911         "Creative Sound Blaster 16",
 912         0,
 913         1,
 914         { .init_isa = SB16_init }
 915     },
 916 #endif
 917
 918 #ifdef CONFIG_CS4231A
 919     {
 920         "cs4231a",
 921         "CS4231A",
 922         0,
 923         1,
 924         { .init_isa = cs4231a_init }
 925     },
 926 #endif
 927
 928 #ifdef CONFIG_ADLIB
 929     {
 930         "adlib",
 931 #ifdef HAS_YMF262
 932         "Yamaha YMF262 (OPL3)",
 933 #else
 934         "Yamaha YM3812 (OPL2)",
 935 #endif
 936         0,
 937         1,
 938         { .init_isa = Adlib_init }
 939     },
 940 #endif
 941
 942 #ifdef CONFIG_GUS
 943     {
 944         "gus",
 945         "Gravis Ultrasound GF1",
 946         0,
 947         1,
 948         { .init_isa = GUS_init }
 949     },
 950 #endif
 951
 952 #ifdef CONFIG_AC97
 953     {
 954         "ac97",
 955         "Intel 82801AA AC97 Audio",
 956         0,
 957         0,
 958         { .init_pci = ac97_init }
 959     },
 960 #endif
 961
 962 #ifdef CONFIG_ES1370
 963     {
 964         "es1370",
 965         "ENSONIQ AudioPCI ES1370",
 966         0,
 967         0,
 968         { .init_pci = es1370_init }
 969     },
 970 #endif
 971
 972 #ifdef CONFIG_HDA
 973     {
 974         "hda",
 975         "Intel HD Audio",
 976         0,
 977         0,
 978         { .init_pci = intel_hda_and_codec_init }
 979     },
 980 #endif
 981
 982 #endif /* HAS_AUDIO_CHOICE */
 983
 984     { NULL, NULL, 0, 0, { NULL } }
 985 };
 986
 987 void select_soundhw(const char *optarg)
 988 {
 989     struct soundhw *c;
 990
 991     if (is_help_option(optarg)) {
 992     show_valid_cards:
 993
 994 #ifdef HAS_AUDIO_CHOICE
 995         printf("Valid sound card names (comma separated):\n");
 996         for (c = soundhw; c->name; ++c) {
 997             printf ("%-11s %s\n", c->name, c->descr);
 998         }
 999         printf("\n-soundhw all will enable all of the above\n");
1000 #else
1001         printf("Machine has no user-selectable audio hardware "
1002                "(it may or may not have always-present audio hardware).\n");
1003 #endif
1004         exit(!is_help_option(optarg));
1005     }
1006     else {
1007         size_t l;
1008         const char *p;
1009         char *e;
1010         int bad_card = 0;
1011
1012         if (!strcmp(optarg, "all")) {
1013             for (c = soundhw; c->name; ++c) {
1014                 c->enabled = 1;
1015             }
1016             return;
1017         }
1018
1019         p = optarg;
1020         while (*p) {
1021             e = strchr(p, ',');
1022             l = !e ? strlen(p) : (size_t) (e - p);
1023
1024             for (c = soundhw; c->name; ++c) {
1025                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1026                     c->enabled = 1;
1027                     break;
1028                 }
1029             }
1030
1031             if (!c->name) {
1032                 if (l > 80) {
1033                     fprintf(stderr,
1034                             "Unknown sound card name (too big to show)\n");
1035                 }
1036                 else {
1037                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1038                             (int) l, p);
1039                 }
1040                 bad_card = 1;
1041             }
1042             p += l + (e != NULL);
1043         }
1044
1045         if (bad_card) {
1046             goto show_valid_cards;
1047         }
1048     }
1049 }
1050
1051 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1052 {
1053     struct soundhw *c;
1054
1055     for (c = soundhw; c->name; ++c) {
1056         if (c->enabled) {
1057             if (c->isa) {
1058                 if (isa_bus) {
1059                     c->init.init_isa(isa_bus);
1060                 }
1061             } else {
1062                 if (pci_bus) {
1063                     c->init.init_pci(pci_bus);
1064                 }
1065             }
1066         }
1067     }
1068 }
1069 #else
1070 void select_soundhw(const char *optarg)
1071 {
1072 }
1073 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1074 {
1075 }
1076 #endif
1077
1078 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1079 {
1080     int ret;
1081
1082     if (strlen(str) != 36) {
1083         return -1;
1084     }
1085
1086     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1087                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1088                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1089                  &uuid[15]);
1090
1091     if (ret != 16) {
1092         return -1;
1093     }
1094 #ifdef TARGET_I386
1095     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1096 #endif
1097     return 0;
1098 }
1099
1100 void do_acpitable_option(const char *optarg)
1101 {
1102 #ifdef TARGET_I386
1103     if (acpi_table_add(optarg) < 0) {
1104         fprintf(stderr, "Wrong acpi table provided\n");
1105         exit(1);
1106     }
1107 #endif
1108 }
1109
1110 void do_smbios_option(const char *optarg)
1111 {
1112 #ifdef TARGET_I386
1113     if (smbios_entry_add(optarg) < 0) {
1114         fprintf(stderr, "Wrong smbios provided\n");
1115         exit(1);
1116     }
1117 #endif
1118 }
1119
1120 void cpudef_init(void)
1121 {
1122 #if defined(cpudef_setup)
1123     cpudef_setup(); /* parse cpu definitions in target config file */
1124 #endif
1125 }
1126
1127 int audio_available(void)
1128 {
1129 #ifdef HAS_AUDIO
1130     return 1;
1131 #else
1132     return 0;
1133 #endif
1134 }
1135
1136 int tcg_available(void)
1137 {
1138     return 1;
1139 }
1140
1141 int kvm_available(void)
1142 {
1143 #ifdef CONFIG_KVM
1144     return 1;
1145 #else
1146     return 0;
1147 #endif
1148 }
1149
1150 int xen_available(void)
1151 {
1152 #ifdef CONFIG_XEN
1153     return 1;
1154 #else
1155     return 0;
1156 #endif
1157 }
1158
1159
1160 TargetInfo *qmp_query_target(Error **errp)
1161 {
1162     TargetInfo *info = g_malloc0(sizeof(*info));
1163
1164     info->arch = TARGET_TYPE;
1165
1166     return info;
1167 }