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 /* Needs iothread lock! */
 383
 384 static void migration_bitmap_sync(void)
 385 {
 386     RAMBlock *block;
 387     ram_addr_t addr;
 388     uint64_t num_dirty_pages_init = migration_dirty_pages;
 389     MigrationState *s = migrate_get_current();
 390     static int64_t start_time;
 391     static int64_t num_dirty_pages_period;
 392     int64_t end_time;
 393
 394     if (!start_time) {
 395         start_time = qemu_get_clock_ms(rt_clock);
 396     }
 397
 398     trace_migration_bitmap_sync_start();
 399     memory_global_sync_dirty_bitmap(get_system_memory());
 400
 401     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 402         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 403             if (memory_region_test_and_clear_dirty(block->mr,
 404                                                    addr, TARGET_PAGE_SIZE,
 405                                                    DIRTY_MEMORY_MIGRATION)) {
 406                 migration_bitmap_set_dirty(block->mr, addr);
 407             }
 408         }
 409     }
 410     trace_migration_bitmap_sync_end(migration_dirty_pages
 411                                     - num_dirty_pages_init);
 412     num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
 413     end_time = qemu_get_clock_ms(rt_clock);
 414
 415     /* more than 1 second = 1000 millisecons */
 416     if (end_time > start_time + 1000) {
 417         s->dirty_pages_rate = num_dirty_pages_period * 1000
 418             / (end_time - start_time);
 419         s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
 420         start_time = end_time;
 421         num_dirty_pages_period = 0;
 422     }
 423 }
 424
 425 /*
 426  * ram_save_block: Writes a page of memory to the stream f
 427  *
 428  * Returns:  The number of bytes written.
 429  *           0 means no dirty pages
 430  */
 431
 432 static int ram_save_block(QEMUFile *f, bool last_stage)
 433 {
 434     RAMBlock *block = last_seen_block;
 435     ram_addr_t offset = last_offset;
 436     bool complete_round = false;
 437     int bytes_sent = 0;
 438     MemoryRegion *mr;
 439     ram_addr_t current_addr;
 440
 441     if (!block)
 442         block = QTAILQ_FIRST(&ram_list.blocks);
 443
 444     while (true) {
 445         mr = block->mr;
 446         offset = migration_bitmap_find_and_reset_dirty(mr, offset);
 447         if (complete_round && block == last_seen_block &&
 448             offset >= last_offset) {
 449             break;
 450         }
 451         if (offset >= block->length) {
 452             offset = 0;
 453             block = QTAILQ_NEXT(block, next);
 454             if (!block) {
 455                 block = QTAILQ_FIRST(&ram_list.blocks);
 456                 complete_round = true;
 457             }
 458         } else {
 459             uint8_t *p;
 460             int cont = (block == last_sent_block) ?
 461                 RAM_SAVE_FLAG_CONTINUE : 0;
 462
 463             p = memory_region_get_ram_ptr(mr) + offset;
 464
 465             /* In doubt sent page as normal */
 466             bytes_sent = -1;
 467             if (is_dup_page(p)) {
 468                 acct_info.dup_pages++;
 469                 bytes_sent = save_block_hdr(f, block, offset, cont,
 470                                             RAM_SAVE_FLAG_COMPRESS);
 471                 qemu_put_byte(f, *p);
 472                 bytes_sent += 1;
 473             } else if (migrate_use_xbzrle()) {
 474                 current_addr = block->offset + offset;
 475                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 476                                               offset, cont, last_stage);
 477                 if (!last_stage) {
 478                     p = get_cached_data(XBZRLE.cache, current_addr);
 479                 }
 480             }
 481
 482             /* XBZRLE overflow or normal page */
 483             if (bytes_sent == -1) {
 484                 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 485                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 486                 bytes_sent += TARGET_PAGE_SIZE;
 487                 acct_info.norm_pages++;
 488             }
 489
 490             /* if page is unmodified, continue to the next */
 491             if (bytes_sent > 0) {
 492                 last_sent_block = block;
 493                 break;
 494             }
 495         }
 496     }
 497     last_seen_block = block;
 498     last_offset = offset;
 499
 500     return bytes_sent;
 501 }
 502
 503 static uint64_t bytes_transferred;
 504
 505 static ram_addr_t ram_save_remaining(void)
 506 {
 507     return migration_dirty_pages;
 508 }
 509
 510 uint64_t ram_bytes_remaining(void)
 511 {
 512     return ram_save_remaining() * TARGET_PAGE_SIZE;
 513 }
 514
 515 uint64_t ram_bytes_transferred(void)
 516 {
 517     return bytes_transferred;
 518 }
 519
 520 uint64_t ram_bytes_total(void)
 521 {
 522     RAMBlock *block;
 523     uint64_t total = 0;
 524
 525     QTAILQ_FOREACH(block, &ram_list.blocks, next)
 526         total += block->length;
 527
 528     return total;
 529 }
 530
 531 static void migration_end(void)
 532 {
 533     if (migration_bitmap) {
 534         memory_global_dirty_log_stop();
 535         g_free(migration_bitmap);
 536         migration_bitmap = NULL;
 537     }
 538
 539     if (XBZRLE.cache) {
 540         cache_fini(XBZRLE.cache);
 541         g_free(XBZRLE.cache);
 542         g_free(XBZRLE.encoded_buf);
 543         g_free(XBZRLE.current_buf);
 544         g_free(XBZRLE.decoded_buf);
 545         XBZRLE.cache = NULL;
 546     }
 547 }
 548
 549 static void ram_migration_cancel(void *opaque)
 550 {
 551     migration_end();
 552 }
 553
 554 static void reset_ram_globals(void)
 555 {
 556     last_seen_block = NULL;
 557     last_sent_block = NULL;
 558     last_offset = 0;
 559     last_version = ram_list.version;
 560 }
 561
 562 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 563
 564 static int ram_save_setup(QEMUFile *f, void *opaque)
 565 {
 566     RAMBlock *block;
 567     int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
 568
 569     migration_bitmap = bitmap_new(ram_pages);
 570     bitmap_set(migration_bitmap, 0, ram_pages);
 571     migration_dirty_pages = ram_pages;
 572
 573     if (migrate_use_xbzrle()) {
 574         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 575                                   TARGET_PAGE_SIZE,
 576                                   TARGET_PAGE_SIZE);
 577         if (!XBZRLE.cache) {
 578             DPRINTF("Error creating cache\n");
 579             return -1;
 580         }
 581         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 582         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 583         acct_clear();
 584     }
 585
 586     qemu_mutex_lock_iothread();
 587     qemu_mutex_lock_ramlist();
 588     bytes_transferred = 0;
 589     reset_ram_globals();
 590
 591     memory_global_dirty_log_start();
 592     migration_bitmap_sync();
 593     qemu_mutex_unlock_iothread();
 594
 595     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 596
 597     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 598         qemu_put_byte(f, strlen(block->idstr));
 599         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 600         qemu_put_be64(f, block->length);
 601     }
 602
 603     qemu_mutex_unlock_ramlist();
 604     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 605
 606     return 0;
 607 }
 608
 609 static int ram_save_iterate(QEMUFile *f, void *opaque)
 610 {
 611     int ret;
 612     int i;
 613     int64_t t0;
 614     int total_sent = 0;
 615
 616     qemu_mutex_lock_ramlist();
 617
 618     if (ram_list.version != last_version) {
 619         reset_ram_globals();
 620     }
 621
 622     t0 = qemu_get_clock_ns(rt_clock);
 623     i = 0;
 624     while ((ret = qemu_file_rate_limit(f)) == 0) {
 625         int bytes_sent;
 626
 627         bytes_sent = ram_save_block(f, false);
 628         /* no more blocks to sent */
 629         if (bytes_sent == 0) {
 630             break;
 631         }
 632         total_sent += bytes_sent;
 633         acct_info.iterations++;
 634         /* we want to check in the 1st loop, just in case it was the 1st time
 635            and we had to sync the dirty bitmap.
 636            qemu_get_clock_ns() is a bit expensive, so we only check each some
 637            iterations
 638         */
 639         if ((i & 63) == 0) {
 640             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
 641             if (t1 > MAX_WAIT) {
 642                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 643                         t1, i);
 644                 break;
 645             }
 646         }
 647         i++;
 648     }
 649
 650     qemu_mutex_unlock_ramlist();
 651
 652     if (ret < 0) {
 653         bytes_transferred += total_sent;
 654         return ret;
 655     }
 656
 657     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 658     total_sent += 8;
 659     bytes_transferred += total_sent;
 660
 661     return total_sent;
 662 }
 663
 664 static int ram_save_complete(QEMUFile *f, void *opaque)
 665 {
 666     qemu_mutex_lock_ramlist();
 667     migration_bitmap_sync();
 668
 669     /* try transferring iterative blocks of memory */
 670
 671     /* flush all remaining blocks regardless of rate limiting */
 672     while (true) {
 673         int bytes_sent;
 674
 675         bytes_sent = ram_save_block(f, true);
 676         /* no more blocks to sent */
 677         if (bytes_sent == 0) {
 678             break;
 679         }
 680         bytes_transferred += bytes_sent;
 681     }
 682     migration_end();
 683
 684     qemu_mutex_unlock_ramlist();
 685     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 686
 687     return 0;
 688 }
 689
 690 static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
 691 {
 692     uint64_t remaining_size;
 693
 694     remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 695
 696     if (remaining_size < max_size) {
 697         qemu_mutex_lock_iothread();
 698         migration_bitmap_sync();
 699         qemu_mutex_unlock_iothread();
 700         remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
 701     }
 702     return remaining_size;
 703 }
 704
 705 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 706 {
 707     int ret, rc = 0;
 708     unsigned int xh_len;
 709     int xh_flags;
 710
 711     if (!XBZRLE.decoded_buf) {
 712         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 713     }
 714
 715     /* extract RLE header */
 716     xh_flags = qemu_get_byte(f);
 717     xh_len = qemu_get_be16(f);
 718
 719     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 720         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 721         return -1;
 722     }
 723
 724     if (xh_len > TARGET_PAGE_SIZE) {
 725         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 726         return -1;
 727     }
 728     /* load data and decode */
 729     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 730
 731     /* decode RLE */
 732     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 733                                TARGET_PAGE_SIZE);
 734     if (ret == -1) {
 735         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 736         rc = -1;
 737     } else  if (ret > TARGET_PAGE_SIZE) {
 738         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 739                 ret, TARGET_PAGE_SIZE);
 740         abort();
 741     }
 742
 743     return rc;
 744 }
 745
 746 static inline void *host_from_stream_offset(QEMUFile *f,
 747                                             ram_addr_t offset,
 748                                             int flags)
 749 {
 750     static RAMBlock *block = NULL;
 751     char id[256];
 752     uint8_t len;
 753
 754     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 755         if (!block) {
 756             fprintf(stderr, "Ack, bad migration stream!\n");
 757             return NULL;
 758         }
 759
 760         return memory_region_get_ram_ptr(block->mr) + offset;
 761     }
 762
 763     len = qemu_get_byte(f);
 764     qemu_get_buffer(f, (uint8_t *)id, len);
 765     id[len] = 0;
 766
 767     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 768         if (!strncmp(id, block->idstr, sizeof(id)))
 769             return memory_region_get_ram_ptr(block->mr) + offset;
 770     }
 771
 772     fprintf(stderr, "Can't find block %s!\n", id);
 773     return NULL;
 774 }
 775
 776 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 777 {
 778     ram_addr_t addr;
 779     int flags, ret = 0;
 780     int error;
 781     static uint64_t seq_iter;
 782
 783     seq_iter++;
 784
 785     if (version_id < 4 || version_id > 4) {
 786         return -EINVAL;
 787     }
 788
 789     do {
 790         addr = qemu_get_be64(f);
 791
 792         flags = addr & ~TARGET_PAGE_MASK;
 793         addr &= TARGET_PAGE_MASK;
 794
 795         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 796             if (version_id == 4) {
 797                 /* Synchronize RAM block list */
 798                 char id[256];
 799                 ram_addr_t length;
 800                 ram_addr_t total_ram_bytes = addr;
 801
 802                 while (total_ram_bytes) {
 803                     RAMBlock *block;
 804                     uint8_t len;
 805
 806                     len = qemu_get_byte(f);
 807                     qemu_get_buffer(f, (uint8_t *)id, len);
 808                     id[len] = 0;
 809                     length = qemu_get_be64(f);
 810
 811                     QTAILQ_FOREACH(block, &ram_list.blocks, next) {
 812                         if (!strncmp(id, block->idstr, sizeof(id))) {
 813                             if (block->length != length) {
 814                                 ret =  -EINVAL;
 815                                 goto done;
 816                             }
 817                             break;
 818                         }
 819                     }
 820
 821                     if (!block) {
 822                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 823                                 "accept migration\n", id);
 824                         ret = -EINVAL;
 825                         goto done;
 826                     }
 827
 828                     total_ram_bytes -= length;
 829                 }
 830             }
 831         }
 832
 833         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 834             void *host;
 835             uint8_t ch;
 836
 837             host = host_from_stream_offset(f, addr, flags);
 838             if (!host) {
 839                 return -EINVAL;
 840             }
 841
 842             ch = qemu_get_byte(f);
 843             memset(host, ch, TARGET_PAGE_SIZE);
 844 #ifndef _WIN32
 845             if (ch == 0 &&
 846                 (!kvm_enabled() || kvm_has_sync_mmu()) &&
 847                 getpagesize() <= TARGET_PAGE_SIZE) {
 848                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 849             }
 850 #endif
 851         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 852             void *host;
 853
 854             host = host_from_stream_offset(f, addr, flags);
 855             if (!host) {
 856                 return -EINVAL;
 857             }
 858
 859             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 860         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 861             void *host = host_from_stream_offset(f, addr, flags);
 862             if (!host) {
 863                 return -EINVAL;
 864             }
 865
 866             if (load_xbzrle(f, addr, host) < 0) {
 867                 ret = -EINVAL;
 868                 goto done;
 869             }
 870         }
 871         error = qemu_file_get_error(f);
 872         if (error) {
 873             ret = error;
 874             goto done;
 875         }
 876     } while (!(flags & RAM_SAVE_FLAG_EOS));
 877
 878 done:
 879     DPRINTF("Completed load of VM with exit code %d seq iteration "
 880             "%" PRIu64 "\n", ret, seq_iter);
 881     return ret;
 882 }
 883
 884 SaveVMHandlers savevm_ram_handlers = {
 885     .save_live_setup = ram_save_setup,
 886     .save_live_iterate = ram_save_iterate,
 887     .save_live_complete = ram_save_complete,
 888     .save_live_pending = ram_save_pending,
 889     .load_state = ram_load,
 890     .cancel = ram_migration_cancel,
 891 };
 892
 893 #ifdef HAS_AUDIO
 894 struct soundhw {
 895     const char *name;
 896     const char *descr;
 897     int enabled;
 898     int isa;
 899     union {
 900         int (*init_isa) (ISABus *bus);
 901         int (*init_pci) (PCIBus *bus);
 902     } init;
 903 };
 904
 905 static struct soundhw soundhw[] = {
 906 #ifdef HAS_AUDIO_CHOICE
 907 #ifdef CONFIG_PCSPK
 908     {
 909         "pcspk",
 910         "PC speaker",
 911         0,
 912         1,
 913         { .init_isa = pcspk_audio_init }
 914     },
 915 #endif
 916
 917 #ifdef CONFIG_SB16
 918     {
 919         "sb16",
 920         "Creative Sound Blaster 16",
 921         0,
 922         1,
 923         { .init_isa = SB16_init }
 924     },
 925 #endif
 926
 927 #ifdef CONFIG_CS4231A
 928     {
 929         "cs4231a",
 930         "CS4231A",
 931         0,
 932         1,
 933         { .init_isa = cs4231a_init }
 934     },
 935 #endif
 936
 937 #ifdef CONFIG_ADLIB
 938     {
 939         "adlib",
 940 #ifdef HAS_YMF262
 941         "Yamaha YMF262 (OPL3)",
 942 #else
 943         "Yamaha YM3812 (OPL2)",
 944 #endif
 945         0,
 946         1,
 947         { .init_isa = Adlib_init }
 948     },
 949 #endif
 950
 951 #ifdef CONFIG_GUS
 952     {
 953         "gus",
 954         "Gravis Ultrasound GF1",
 955         0,
 956         1,
 957         { .init_isa = GUS_init }
 958     },
 959 #endif
 960
 961 #ifdef CONFIG_AC97
 962     {
 963         "ac97",
 964         "Intel 82801AA AC97 Audio",
 965         0,
 966         0,
 967         { .init_pci = ac97_init }
 968     },
 969 #endif
 970
 971 #ifdef CONFIG_ES1370
 972     {
 973         "es1370",
 974         "ENSONIQ AudioPCI ES1370",
 975         0,
 976         0,
 977         { .init_pci = es1370_init }
 978     },
 979 #endif
 980
 981 #ifdef CONFIG_HDA
 982     {
 983         "hda",
 984         "Intel HD Audio",
 985         0,
 986         0,
 987         { .init_pci = intel_hda_and_codec_init }
 988     },
 989 #endif
 990
 991 #endif /* HAS_AUDIO_CHOICE */
 992
 993     { NULL, NULL, 0, 0, { NULL } }
 994 };
 995
 996 void select_soundhw(const char *optarg)
 997 {
 998     struct soundhw *c;
 999
1000     if (is_help_option(optarg)) {
1001     show_valid_cards:
1002
1003 #ifdef HAS_AUDIO_CHOICE
1004         printf("Valid sound card names (comma separated):\n");
1005         for (c = soundhw; c->name; ++c) {
1006             printf ("%-11s %s\n", c->name, c->descr);
1007         }
1008         printf("\n-soundhw all will enable all of the above\n");
1009 #else
1010         printf("Machine has no user-selectable audio hardware "
1011                "(it may or may not have always-present audio hardware).\n");
1012 #endif
1013         exit(!is_help_option(optarg));
1014     }
1015     else {
1016         size_t l;
1017         const char *p;
1018         char *e;
1019         int bad_card = 0;
1020
1021         if (!strcmp(optarg, "all")) {
1022             for (c = soundhw; c->name; ++c) {
1023                 c->enabled = 1;
1024             }
1025             return;
1026         }
1027
1028         p = optarg;
1029         while (*p) {
1030             e = strchr(p, ',');
1031             l = !e ? strlen(p) : (size_t) (e - p);
1032
1033             for (c = soundhw; c->name; ++c) {
1034                 if (!strncmp(c->name, p, l) && !c->name[l]) {
1035                     c->enabled = 1;
1036                     break;
1037                 }
1038             }
1039
1040             if (!c->name) {
1041                 if (l > 80) {
1042                     fprintf(stderr,
1043                             "Unknown sound card name (too big to show)\n");
1044                 }
1045                 else {
1046                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
1047                             (int) l, p);
1048                 }
1049                 bad_card = 1;
1050             }
1051             p += l + (e != NULL);
1052         }
1053
1054         if (bad_card) {
1055             goto show_valid_cards;
1056         }
1057     }
1058 }
1059
1060 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1061 {
1062     struct soundhw *c;
1063
1064     for (c = soundhw; c->name; ++c) {
1065         if (c->enabled) {
1066             if (c->isa) {
1067                 if (isa_bus) {
1068                     c->init.init_isa(isa_bus);
1069                 }
1070             } else {
1071                 if (pci_bus) {
1072                     c->init.init_pci(pci_bus);
1073                 }
1074             }
1075         }
1076     }
1077 }
1078 #else
1079 void select_soundhw(const char *optarg)
1080 {
1081 }
1082 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1083 {
1084 }
1085 #endif
1086
1087 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1088 {
1089     int ret;
1090
1091     if (strlen(str) != 36) {
1092         return -1;
1093     }
1094
1095     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1096                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1097                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1098                  &uuid[15]);
1099
1100     if (ret != 16) {
1101         return -1;
1102     }
1103 #ifdef TARGET_I386
1104     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1105 #endif
1106     return 0;
1107 }
1108
1109 void do_acpitable_option(const char *optarg)
1110 {
1111 #ifdef TARGET_I386
1112     if (acpi_table_add(optarg) < 0) {
1113         fprintf(stderr, "Wrong acpi table provided\n");
1114         exit(1);
1115     }
1116 #endif
1117 }
1118
1119 void do_smbios_option(const char *optarg)
1120 {
1121 #ifdef TARGET_I386
1122     if (smbios_entry_add(optarg) < 0) {
1123         fprintf(stderr, "Wrong smbios provided\n");
1124         exit(1);
1125     }
1126 #endif
1127 }
1128
1129 void cpudef_init(void)
1130 {
1131 #if defined(cpudef_setup)
1132     cpudef_setup(); /* parse cpu definitions in target config file */
1133 #endif
1134 }
1135
1136 int audio_available(void)
1137 {
1138 #ifdef HAS_AUDIO
1139     return 1;
1140 #else
1141     return 0;
1142 #endif
1143 }
1144
1145 int tcg_available(void)
1146 {
1147     return 1;
1148 }
1149
1150 int kvm_available(void)
1151 {
1152 #ifdef CONFIG_KVM
1153     return 1;
1154 #else
1155     return 0;
1156 #endif
1157 }
1158
1159 int xen_available(void)
1160 {
1161 #ifdef CONFIG_XEN
1162     return 1;
1163 #else
1164     return 0;
1165 #endif
1166 }
1167
1168
1169 TargetInfo *qmp_query_target(Error **errp)
1170 {
1171     TargetInfo *info = g_malloc0(sizeof(*info));
1172
1173     info->arch = TARGET_TYPE;
1174
1175     return info;
1176 }