arch_init.c

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