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.h"
  33 #include "sysemu.h"
  34 #include "arch_init.h"
  35 #include "audio/audio.h"
  36 #include "hw/pc.h"
  37 #include "hw/pci.h"
  38 #include "hw/audiodev.h"
  39 #include "kvm.h"
  40 #include "migration.h"
  41 #include "net.h"
  42 #include "gdbstub.h"
  43 #include "hw/smbios.h"
  44 #include "exec-memory.h"
  45 #include "hw/pcspk.h"
  46 #include "qemu/page_cache.h"
  47 #include "qmp-commands.h"
  48
  49 #ifdef DEBUG_ARCH_INIT
  50 #define DPRINTF(fmt, ...) \
  51     do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
  52 #else
  53 #define DPRINTF(fmt, ...) \
  54     do { } while (0)
  55 #endif
  56
  57 #ifdef TARGET_SPARC
  58 int graphic_width = 1024;
  59 int graphic_height = 768;
  60 int graphic_depth = 8;
  61 #else
  62 int graphic_width = 800;
  63 int graphic_height = 600;
  64 int graphic_depth = 15;
  65 #endif
  66
  67
  68 #if defined(TARGET_ALPHA)
  69 #define QEMU_ARCH QEMU_ARCH_ALPHA
  70 #elif defined(TARGET_ARM)
  71 #define QEMU_ARCH QEMU_ARCH_ARM
  72 #elif defined(TARGET_CRIS)
  73 #define QEMU_ARCH QEMU_ARCH_CRIS
  74 #elif defined(TARGET_I386)
  75 #define QEMU_ARCH QEMU_ARCH_I386
  76 #elif defined(TARGET_M68K)
  77 #define QEMU_ARCH QEMU_ARCH_M68K
  78 #elif defined(TARGET_LM32)
  79 #define QEMU_ARCH QEMU_ARCH_LM32
  80 #elif defined(TARGET_MICROBLAZE)
  81 #define QEMU_ARCH QEMU_ARCH_MICROBLAZE
  82 #elif defined(TARGET_MIPS)
  83 #define QEMU_ARCH QEMU_ARCH_MIPS
  84 #elif defined(TARGET_OPENRISC)
  85 #define QEMU_ARCH QEMU_ARCH_OPENRISC
  86 #elif defined(TARGET_PPC)
  87 #define QEMU_ARCH QEMU_ARCH_PPC
  88 #elif defined(TARGET_S390X)
  89 #define QEMU_ARCH QEMU_ARCH_S390X
  90 #elif defined(TARGET_SH4)
  91 #define QEMU_ARCH QEMU_ARCH_SH4
  92 #elif defined(TARGET_SPARC)
  93 #define QEMU_ARCH QEMU_ARCH_SPARC
  94 #elif defined(TARGET_XTENSA)
  95 #define QEMU_ARCH QEMU_ARCH_XTENSA
  96 #elif defined(TARGET_UNICORE32)
  97 #define QEMU_ARCH QEMU_ARCH_UNICORE32
  98 #endif
  99
 100 const uint32_t arch_type = QEMU_ARCH;
 101
 102 /***********************************************************/
 103 /* ram save/restore */
 104
 105 #define RAM_SAVE_FLAG_FULL     0x01 /* Obsolete, not used anymore */
 106 #define RAM_SAVE_FLAG_COMPRESS 0x02
 107 #define RAM_SAVE_FLAG_MEM_SIZE 0x04
 108 #define RAM_SAVE_FLAG_PAGE     0x08
 109 #define RAM_SAVE_FLAG_EOS      0x10
 110 #define RAM_SAVE_FLAG_CONTINUE 0x20
 111 #define RAM_SAVE_FLAG_XBZRLE   0x40
 112
 113 #ifdef __ALTIVEC__
 114 #include <altivec.h>
 115 #define VECTYPE        vector unsigned char
 116 #define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
 117 #define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
 118 /* altivec.h may redefine the bool macro as vector type.
 119  * Reset it to POSIX semantics. */
 120 #undef bool
 121 #define bool _Bool
 122 #elif defined __SSE2__
 123 #include <emmintrin.h>
 124 #define VECTYPE        __m128i
 125 #define SPLAT(p)       _mm_set1_epi8(*(p))
 126 #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
 127 #else
 128 #define VECTYPE        unsigned long
 129 #define SPLAT(p)       (*(p) * (~0UL / 255))
 130 #define ALL_EQ(v1, v2) ((v1) == (v2))
 131 #endif
 132
 133
 134 static struct defconfig_file {
 135     const char *filename;
 136     /* Indicates it is an user config file (disabled by -no-user-config) */
 137     bool userconfig;
 138 } default_config_files[] = {
 139     { CONFIG_QEMU_DATADIR "/cpus-" TARGET_ARCH ".conf",  false },
 140     { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
 141     { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
 142     { NULL }, /* end of list */
 143 };
 144
 145
 146 int qemu_read_default_config_files(bool userconfig)
 147 {
 148     int ret;
 149     struct defconfig_file *f;
 150
 151     for (f = default_config_files; f->filename; f++) {
 152         if (!userconfig && f->userconfig) {
 153             continue;
 154         }
 155         ret = qemu_read_config_file(f->filename);
 156         if (ret < 0 && ret != -ENOENT) {
 157             return ret;
 158         }
 159     }
 160
 161     return 0;
 162 }
 163
 164 static int is_dup_page(uint8_t *page)
 165 {
 166     VECTYPE *p = (VECTYPE *)page;
 167     VECTYPE val = SPLAT(page);
 168     int i;
 169
 170     for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) {
 171         if (!ALL_EQ(val, p[i])) {
 172             return 0;
 173         }
 174     }
 175
 176     return 1;
 177 }
 178
 179 /* struct contains XBZRLE cache and a static page
 180    used by the compression */
 181 static struct {
 182     /* buffer used for XBZRLE encoding */
 183     uint8_t *encoded_buf;
 184     /* buffer for storing page content */
 185     uint8_t *current_buf;
 186     /* buffer used for XBZRLE decoding */
 187     uint8_t *decoded_buf;
 188     /* Cache for XBZRLE */
 189     PageCache *cache;
 190 } XBZRLE = {
 191     .encoded_buf = NULL,
 192     .current_buf = NULL,
 193     .decoded_buf = NULL,
 194     .cache = NULL,
 195 };
 196
 197
 198 int64_t xbzrle_cache_resize(int64_t new_size)
 199 {
 200     if (XBZRLE.cache != NULL) {
 201         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 202             TARGET_PAGE_SIZE;
 203     }
 204     return pow2floor(new_size);
 205 }
 206
 207 /* accounting for migration statistics */
 208 typedef struct AccountingInfo {
 209     uint64_t dup_pages;
 210     uint64_t norm_pages;
 211     uint64_t iterations;
 212     uint64_t xbzrle_bytes;
 213     uint64_t xbzrle_pages;
 214     uint64_t xbzrle_cache_miss;
 215     uint64_t xbzrle_overflows;
 216 } AccountingInfo;
 217
 218 static AccountingInfo acct_info;
 219
 220 static void acct_clear(void)
 221 {
 222     memset(&acct_info, 0, sizeof(acct_info));
 223 }
 224
 225 uint64_t dup_mig_bytes_transferred(void)
 226 {
 227     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 228 }
 229
 230 uint64_t dup_mig_pages_transferred(void)
 231 {
 232     return acct_info.dup_pages;
 233 }
 234
 235 uint64_t norm_mig_bytes_transferred(void)
 236 {
 237     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 238 }
 239
 240 uint64_t norm_mig_pages_transferred(void)
 241 {
 242     return acct_info.norm_pages;
 243 }
 244
 245 uint64_t xbzrle_mig_bytes_transferred(void)
 246 {
 247     return acct_info.xbzrle_bytes;
 248 }
 249
 250 uint64_t xbzrle_mig_pages_transferred(void)
 251 {
 252     return acct_info.xbzrle_pages;
 253 }
 254
 255 uint64_t xbzrle_mig_pages_cache_miss(void)
 256 {
 257     return acct_info.xbzrle_cache_miss;
 258 }
 259
 260 uint64_t xbzrle_mig_pages_overflow(void)
 261 {
 262     return acct_info.xbzrle_overflows;
 263 }
 264
 265 static void save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 266         int cont, int flag)
 267 {
 268         qemu_put_be64(f, offset | cont | flag);
 269         if (!cont) {
 270                 qemu_put_byte(f, strlen(block->idstr));
 271                 qemu_put_buffer(f, (uint8_t *)block->idstr,
 272                                 strlen(block->idstr));
 273         }
 274
 275 }
 276
 277 #define ENCODING_FLAG_XBZRLE 0x1
 278
 279 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 280                             ram_addr_t current_addr, RAMBlock *block,
 281                             ram_addr_t offset, int cont, bool last_stage)
 282 {
 283     int encoded_len = 0, bytes_sent = -1;
 284     uint8_t *prev_cached_page;
 285
 286     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 287         if (!last_stage) {
 288             cache_insert(XBZRLE.cache, current_addr,
 289                          g_memdup(current_data, TARGET_PAGE_SIZE));
 290         }
 291         acct_info.xbzrle_cache_miss++;
 292         return -1;
 293     }
 294
 295     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 296
 297     /* save current buffer into memory */
 298     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 299
 300     /* XBZRLE encoding (if there is no overflow) */
 301     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 302                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 303                                        TARGET_PAGE_SIZE);
 304     if (encoded_len == 0) {
 305         DPRINTF("Skipping unmodified page\n");
 306         return 0;
 307     } else if (encoded_len == -1) {
 308         DPRINTF("Overflow\n");
 309         acct_info.xbzrle_overflows++;
 310         /* update data in the cache */
 311         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 312         return -1;
 313     }
 314
 315     /* we need to update the data in the cache, in order to get the same data */
 316     if (!last_stage) {
 317         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 318     }
 319
 320     /* Send XBZRLE based compressed page */
 321     save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 322     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 323     qemu_put_be16(f, encoded_len);
 324     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 325     bytes_sent = encoded_len + 1 + 2;
 326     acct_info.xbzrle_pages++;
 327     acct_info.xbzrle_bytes += bytes_sent;
 328
 329     return bytes_sent;
 330 }
 331
 332 static RAMBlock *last_block;
 333 static ram_addr_t last_offset;
 334
 335 /*
 336  * ram_save_block: Writes a page of memory to the stream f
 337  *
 338  * Returns:  0: if the page hasn't changed
 339  *          -1: if there are no more dirty pages
 340  *           n: the amount of bytes written in other case
 341  */
 342
 343 static int ram_save_block(QEMUFile *f, bool last_stage)
 344 {
 345     RAMBlock *block = last_block;
 346     ram_addr_t offset = last_offset;
 347     int bytes_sent = -1;
 348     MemoryRegion *mr;
 349     ram_addr_t current_addr;
 350
 351     if (!block)
 352         block = QLIST_FIRST(&ram_list.blocks);
 353
 354     do {
 355         mr = block->mr;
 356         if (memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
 357                                     DIRTY_MEMORY_MIGRATION)) {
 358             uint8_t *p;
 359             int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
 360
 361             memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
 362                                       DIRTY_MEMORY_MIGRATION);
 363
 364             p = memory_region_get_ram_ptr(mr) + offset;
 365
 366             if (is_dup_page(p)) {
 367                 acct_info.dup_pages++;
 368                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_COMPRESS);
 369                 qemu_put_byte(f, *p);
 370                 bytes_sent = 1;
 371             } else if (migrate_use_xbzrle()) {
 372                 current_addr = block->offset + offset;
 373                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 374                                               offset, cont, last_stage);
 375                 if (!last_stage) {
 376                     p = get_cached_data(XBZRLE.cache, current_addr);
 377                 }
 378             }
 379
 380             /* either we didn't send yet (we may have had XBZRLE overflow) */
 381             if (bytes_sent == -1) {
 382                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 383                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 384                 bytes_sent = TARGET_PAGE_SIZE;
 385                 acct_info.norm_pages++;
 386             }
 387
 388             /* if page is unmodified, continue to the next */
 389             if (bytes_sent != 0) {
 390                 break;
 391             }
 392         }
 393
 394         offset += TARGET_PAGE_SIZE;
 395         if (offset >= block->length) {
 396             offset = 0;
 397             block = QLIST_NEXT(block, next);
 398             if (!block)
 399                 block = QLIST_FIRST(&ram_list.blocks);
 400         }
 401     } while (block != last_block || offset != last_offset);
 402
 403     last_block = block;
 404     last_offset = offset;
 405
 406     return bytes_sent;
 407 }
 408
 409 static uint64_t bytes_transferred;
 410
 411 static ram_addr_t ram_save_remaining(void)
 412 {
 413     return ram_list.dirty_pages;
 414 }
 415
 416 uint64_t ram_bytes_remaining(void)
 417 {
 418     return ram_save_remaining() * TARGET_PAGE_SIZE;
 419 }
 420
 421 uint64_t ram_bytes_transferred(void)
 422 {
 423     return bytes_transferred;
 424 }
 425
 426 uint64_t ram_bytes_total(void)
 427 {
 428     RAMBlock *block;
 429     uint64_t total = 0;
 430
 431     QLIST_FOREACH(block, &ram_list.blocks, next)
 432         total += block->length;
 433
 434     return total;
 435 }
 436
 437 static int block_compar(const void *a, const void *b)
 438 {
 439     RAMBlock * const *ablock = a;
 440     RAMBlock * const *bblock = b;
 441
 442     return strcmp((*ablock)->idstr, (*bblock)->idstr);
 443 }
 444
 445 static void sort_ram_list(void)
 446 {
 447     RAMBlock *block, *nblock, **blocks;
 448     int n;
 449     n = 0;
 450     QLIST_FOREACH(block, &ram_list.blocks, next) {
 451         ++n;
 452     }
 453     blocks = g_malloc(n * sizeof *blocks);
 454     n = 0;
 455     QLIST_FOREACH_SAFE(block, &ram_list.blocks, next, nblock) {
 456         blocks[n++] = block;
 457         QLIST_REMOVE(block, next);
 458     }
 459     qsort(blocks, n, sizeof *blocks, block_compar);
 460     while (--n >= 0) {
 461         QLIST_INSERT_HEAD(&ram_list.blocks, blocks[n], next);
 462     }
 463     g_free(blocks);
 464 }
 465
 466 static void migration_end(void)
 467 {
 468     memory_global_dirty_log_stop();
 469
 470     if (migrate_use_xbzrle()) {
 471         cache_fini(XBZRLE.cache);
 472         g_free(XBZRLE.cache);
 473         g_free(XBZRLE.encoded_buf);
 474         g_free(XBZRLE.current_buf);
 475         g_free(XBZRLE.decoded_buf);
 476         XBZRLE.cache = NULL;
 477     }
 478 }
 479
 480 static void ram_migration_cancel(void *opaque)
 481 {
 482     migration_end();
 483 }
 484
 485 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 486
 487 static int ram_save_setup(QEMUFile *f, void *opaque)
 488 {
 489     ram_addr_t addr;
 490     RAMBlock *block;
 491
 492     bytes_transferred = 0;
 493     last_block = NULL;
 494     last_offset = 0;
 495     sort_ram_list();
 496
 497     if (migrate_use_xbzrle()) {
 498         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 499                                   TARGET_PAGE_SIZE,
 500                                   TARGET_PAGE_SIZE);
 501         if (!XBZRLE.cache) {
 502             DPRINTF("Error creating cache\n");
 503             return -1;
 504         }
 505         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 506         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 507         acct_clear();
 508     }
 509
 510     /* Make sure all dirty bits are set */
 511     QLIST_FOREACH(block, &ram_list.blocks, next) {
 512         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 513             if (!memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE,
 514                                          DIRTY_MEMORY_MIGRATION)) {
 515                 memory_region_set_dirty(block->mr, addr, TARGET_PAGE_SIZE);
 516             }
 517         }
 518     }
 519
 520     memory_global_dirty_log_start();
 521
 522     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 523
 524     QLIST_FOREACH(block, &ram_list.blocks, next) {
 525         qemu_put_byte(f, strlen(block->idstr));
 526         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 527         qemu_put_be64(f, block->length);
 528     }
 529
 530     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 531
 532     return 0;
 533 }
 534
 535 static int ram_save_iterate(QEMUFile *f, void *opaque)
 536 {
 537     uint64_t bytes_transferred_last;
 538     double bwidth = 0;
 539     int ret;
 540     int i;
 541     uint64_t expected_time;
 542
 543     bytes_transferred_last = bytes_transferred;
 544     bwidth = qemu_get_clock_ns(rt_clock);
 545
 546     i = 0;
 547     while ((ret = qemu_file_rate_limit(f)) == 0) {
 548         int bytes_sent;
 549
 550         bytes_sent = ram_save_block(f, false);
 551         /* no more blocks to sent */
 552         if (bytes_sent < 0) {
 553             break;
 554         }
 555         bytes_transferred += bytes_sent;
 556         acct_info.iterations++;
 557         /* we want to check in the 1st loop, just in case it was the 1st time
 558            and we had to sync the dirty bitmap.
 559            qemu_get_clock_ns() is a bit expensive, so we only check each some
 560            iterations
 561         */
 562         if ((i & 63) == 0) {
 563             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - bwidth) / 1000000;
 564             if (t1 > MAX_WAIT) {
 565                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 566                         t1, i);
 567                 break;
 568             }
 569         }
 570         i++;
 571     }
 572
 573     if (ret < 0) {
 574         return ret;
 575     }
 576
 577     bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
 578     bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
 579
 580     /* if we haven't transferred anything this round, force expected_time to a
 581      * a very high value, but without crashing */
 582     if (bwidth == 0) {
 583         bwidth = 0.000001;
 584     }
 585
 586     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 587
 588     expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 589
 590     DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(%" PRIu64 ")?\n",
 591             expected_time, migrate_max_downtime());
 592
 593     if (expected_time <= migrate_max_downtime()) {
 594         memory_global_sync_dirty_bitmap(get_system_memory());
 595         expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 596
 597         return expected_time <= migrate_max_downtime();
 598     }
 599     return 0;
 600 }
 601
 602 static int ram_save_complete(QEMUFile *f, void *opaque)
 603 {
 604     memory_global_sync_dirty_bitmap(get_system_memory());
 605
 606     /* try transferring iterative blocks of memory */
 607
 608     /* flush all remaining blocks regardless of rate limiting */
 609     while (true) {
 610         int bytes_sent;
 611
 612         bytes_sent = ram_save_block(f, true);
 613         /* no more blocks to sent */
 614         if (bytes_sent < 0) {
 615             break;
 616         }
 617         bytes_transferred += bytes_sent;
 618     }
 619     memory_global_dirty_log_stop();
 620
 621     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 622
 623     return 0;
 624 }
 625
 626 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 627 {
 628     int ret, rc = 0;
 629     unsigned int xh_len;
 630     int xh_flags;
 631
 632     if (!XBZRLE.decoded_buf) {
 633         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 634     }
 635
 636     /* extract RLE header */
 637     xh_flags = qemu_get_byte(f);
 638     xh_len = qemu_get_be16(f);
 639
 640     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 641         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 642         return -1;
 643     }
 644
 645     if (xh_len > TARGET_PAGE_SIZE) {
 646         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 647         return -1;
 648     }
 649     /* load data and decode */
 650     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 651
 652     /* decode RLE */
 653     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 654                                TARGET_PAGE_SIZE);
 655     if (ret == -1) {
 656         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 657         rc = -1;
 658     } else  if (ret > TARGET_PAGE_SIZE) {
 659         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 660                 ret, TARGET_PAGE_SIZE);
 661         abort();
 662     }
 663
 664     return rc;
 665 }
 666
 667 static inline void *host_from_stream_offset(QEMUFile *f,
 668                                             ram_addr_t offset,
 669                                             int flags)
 670 {
 671     static RAMBlock *block = NULL;
 672     char id[256];
 673     uint8_t len;
 674
 675     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 676         if (!block) {
 677             fprintf(stderr, "Ack, bad migration stream!\n");
 678             return NULL;
 679         }
 680
 681         return memory_region_get_ram_ptr(block->mr) + offset;
 682     }
 683
 684     len = qemu_get_byte(f);
 685     qemu_get_buffer(f, (uint8_t *)id, len);
 686     id[len] = 0;
 687
 688     QLIST_FOREACH(block, &ram_list.blocks, next) {
 689         if (!strncmp(id, block->idstr, sizeof(id)))
 690             return memory_region_get_ram_ptr(block->mr) + offset;
 691     }
 692
 693     fprintf(stderr, "Can't find block %s!\n", id);
 694     return NULL;
 695 }
 696
 697 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 698 {
 699     ram_addr_t addr;
 700     int flags, ret = 0;
 701     int error;
 702     static uint64_t seq_iter;
 703
 704     seq_iter++;
 705
 706     if (version_id < 4 || version_id > 4) {
 707         return -EINVAL;
 708     }
 709
 710     do {
 711         addr = qemu_get_be64(f);
 712
 713         flags = addr & ~TARGET_PAGE_MASK;
 714         addr &= TARGET_PAGE_MASK;
 715
 716         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 717             if (version_id == 4) {
 718                 /* Synchronize RAM block list */
 719                 char id[256];
 720                 ram_addr_t length;
 721                 ram_addr_t total_ram_bytes = addr;
 722
 723                 while (total_ram_bytes) {
 724                     RAMBlock *block;
 725                     uint8_t len;
 726
 727                     len = qemu_get_byte(f);
 728                     qemu_get_buffer(f, (uint8_t *)id, len);
 729                     id[len] = 0;
 730                     length = qemu_get_be64(f);
 731
 732                     QLIST_FOREACH(block, &ram_list.blocks, next) {
 733                         if (!strncmp(id, block->idstr, sizeof(id))) {
 734                             if (block->length != length) {
 735                                 ret =  -EINVAL;
 736                                 goto done;
 737                             }
 738                             break;
 739                         }
 740                     }
 741
 742                     if (!block) {
 743                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 744                                 "accept migration\n", id);
 745                         ret = -EINVAL;
 746                         goto done;
 747                     }
 748
 749                     total_ram_bytes -= length;
 750                 }
 751             }
 752         }
 753
 754         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 755             void *host;
 756             uint8_t ch;
 757
 758             host = host_from_stream_offset(f, addr, flags);
 759             if (!host) {
 760                 return -EINVAL;
 761             }
 762
 763             ch = qemu_get_byte(f);
 764             memset(host, ch, TARGET_PAGE_SIZE);
 765 #ifndef _WIN32
 766             if (ch == 0 &&
 767                 (!kvm_enabled() || kvm_has_sync_mmu())) {
 768                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 769             }
 770 #endif
 771         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 772             void *host;
 773
 774             host = host_from_stream_offset(f, addr, flags);
 775             if (!host) {
 776                 return -EINVAL;
 777             }
 778
 779             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 780         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 781             if (!migrate_use_xbzrle()) {
 782                 return -EINVAL;
 783             }
 784             void *host = host_from_stream_offset(f, addr, flags);
 785             if (!host) {
 786                 return -EINVAL;
 787             }
 788
 789             if (load_xbzrle(f, addr, host) < 0) {
 790                 ret = -EINVAL;
 791                 goto done;
 792             }
 793         }
 794         error = qemu_file_get_error(f);
 795         if (error) {
 796             ret = error;
 797             goto done;
 798         }
 799     } while (!(flags & RAM_SAVE_FLAG_EOS));
 800
 801 done:
 802     DPRINTF("Completed load of VM with exit code %d seq iteration "
 803             "%" PRIu64 "\n", ret, seq_iter);
 804     return ret;
 805 }
 806
 807 SaveVMHandlers savevm_ram_handlers = {
 808     .save_live_setup = ram_save_setup,
 809     .save_live_iterate = ram_save_iterate,
 810     .save_live_complete = ram_save_complete,
 811     .load_state = ram_load,
 812     .cancel = ram_migration_cancel,
 813 };
 814
 815 #ifdef HAS_AUDIO
 816 struct soundhw {
 817     const char *name;
 818     const char *descr;
 819     int enabled;
 820     int isa;
 821     union {
 822         int (*init_isa) (ISABus *bus);
 823         int (*init_pci) (PCIBus *bus);
 824     } init;
 825 };
 826
 827 static struct soundhw soundhw[] = {
 828 #ifdef HAS_AUDIO_CHOICE
 829 #ifdef CONFIG_PCSPK
 830     {
 831         "pcspk",
 832         "PC speaker",
 833         0,
 834         1,
 835         { .init_isa = pcspk_audio_init }
 836     },
 837 #endif
 838
 839 #ifdef CONFIG_SB16
 840     {
 841         "sb16",
 842         "Creative Sound Blaster 16",
 843         0,
 844         1,
 845         { .init_isa = SB16_init }
 846     },
 847 #endif
 848
 849 #ifdef CONFIG_CS4231A
 850     {
 851         "cs4231a",
 852         "CS4231A",
 853         0,
 854         1,
 855         { .init_isa = cs4231a_init }
 856     },
 857 #endif
 858
 859 #ifdef CONFIG_ADLIB
 860     {
 861         "adlib",
 862 #ifdef HAS_YMF262
 863         "Yamaha YMF262 (OPL3)",
 864 #else
 865         "Yamaha YM3812 (OPL2)",
 866 #endif
 867         0,
 868         1,
 869         { .init_isa = Adlib_init }
 870     },
 871 #endif
 872
 873 #ifdef CONFIG_GUS
 874     {
 875         "gus",
 876         "Gravis Ultrasound GF1",
 877         0,
 878         1,
 879         { .init_isa = GUS_init }
 880     },
 881 #endif
 882
 883 #ifdef CONFIG_AC97
 884     {
 885         "ac97",
 886         "Intel 82801AA AC97 Audio",
 887         0,
 888         0,
 889         { .init_pci = ac97_init }
 890     },
 891 #endif
 892
 893 #ifdef CONFIG_ES1370
 894     {
 895         "es1370",
 896         "ENSONIQ AudioPCI ES1370",
 897         0,
 898         0,
 899         { .init_pci = es1370_init }
 900     },
 901 #endif
 902
 903 #ifdef CONFIG_HDA
 904     {
 905         "hda",
 906         "Intel HD Audio",
 907         0,
 908         0,
 909         { .init_pci = intel_hda_and_codec_init }
 910     },
 911 #endif
 912
 913 #endif /* HAS_AUDIO_CHOICE */
 914
 915     { NULL, NULL, 0, 0, { NULL } }
 916 };
 917
 918 void select_soundhw(const char *optarg)
 919 {
 920     struct soundhw *c;
 921
 922     if (is_help_option(optarg)) {
 923     show_valid_cards:
 924
 925 #ifdef HAS_AUDIO_CHOICE
 926         printf("Valid sound card names (comma separated):\n");
 927         for (c = soundhw; c->name; ++c) {
 928             printf ("%-11s %s\n", c->name, c->descr);
 929         }
 930         printf("\n-soundhw all will enable all of the above\n");
 931 #else
 932         printf("Machine has no user-selectable audio hardware "
 933                "(it may or may not have always-present audio hardware).\n");
 934 #endif
 935         exit(!is_help_option(optarg));
 936     }
 937     else {
 938         size_t l;
 939         const char *p;
 940         char *e;
 941         int bad_card = 0;
 942
 943         if (!strcmp(optarg, "all")) {
 944             for (c = soundhw; c->name; ++c) {
 945                 c->enabled = 1;
 946             }
 947             return;
 948         }
 949
 950         p = optarg;
 951         while (*p) {
 952             e = strchr(p, ',');
 953             l = !e ? strlen(p) : (size_t) (e - p);
 954
 955             for (c = soundhw; c->name; ++c) {
 956                 if (!strncmp(c->name, p, l) && !c->name[l]) {
 957                     c->enabled = 1;
 958                     break;
 959                 }
 960             }
 961
 962             if (!c->name) {
 963                 if (l > 80) {
 964                     fprintf(stderr,
 965                             "Unknown sound card name (too big to show)\n");
 966                 }
 967                 else {
 968                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
 969                             (int) l, p);
 970                 }
 971                 bad_card = 1;
 972             }
 973             p += l + (e != NULL);
 974         }
 975
 976         if (bad_card) {
 977             goto show_valid_cards;
 978         }
 979     }
 980 }
 981
 982 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
 983 {
 984     struct soundhw *c;
 985
 986     for (c = soundhw; c->name; ++c) {
 987         if (c->enabled) {
 988             if (c->isa) {
 989                 if (isa_bus) {
 990                     c->init.init_isa(isa_bus);
 991                 }
 992             } else {
 993                 if (pci_bus) {
 994                     c->init.init_pci(pci_bus);
 995                 }
 996             }
 997         }
 998     }
 999 }
1000 #else
1001 void select_soundhw(const char *optarg)
1002 {
1003 }
1004 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1005 {
1006 }
1007 #endif
1008
1009 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1010 {
1011     int ret;
1012
1013     if (strlen(str) != 36) {
1014         return -1;
1015     }
1016
1017     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1018                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1019                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1020                  &uuid[15]);
1021
1022     if (ret != 16) {
1023         return -1;
1024     }
1025 #ifdef TARGET_I386
1026     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1027 #endif
1028     return 0;
1029 }
1030
1031 void do_acpitable_option(const char *optarg)
1032 {
1033 #ifdef TARGET_I386
1034     if (acpi_table_add(optarg) < 0) {
1035         fprintf(stderr, "Wrong acpi table provided\n");
1036         exit(1);
1037     }
1038 #endif
1039 }
1040
1041 void do_smbios_option(const char *optarg)
1042 {
1043 #ifdef TARGET_I386
1044     if (smbios_entry_add(optarg) < 0) {
1045         fprintf(stderr, "Wrong smbios provided\n");
1046         exit(1);
1047     }
1048 #endif
1049 }
1050
1051 void cpudef_init(void)
1052 {
1053 #if defined(cpudef_setup)
1054     cpudef_setup(); /* parse cpu definitions in target config file */
1055 #endif
1056 }
1057
1058 int audio_available(void)
1059 {
1060 #ifdef HAS_AUDIO
1061     return 1;
1062 #else
1063     return 0;
1064 #endif
1065 }
1066
1067 int tcg_available(void)
1068 {
1069     return 1;
1070 }
1071
1072 int kvm_available(void)
1073 {
1074 #ifdef CONFIG_KVM
1075     return 1;
1076 #else
1077     return 0;
1078 #endif
1079 }
1080
1081 int xen_available(void)
1082 {
1083 #ifdef CONFIG_XEN
1084     return 1;
1085 #else
1086     return 0;
1087 #endif
1088 }
1089
1090
1091 TargetInfo *qmp_query_target(Error **errp)
1092 {
1093     TargetInfo *info = g_malloc0(sizeof(*info));
1094
1095     info->arch = TARGET_TYPE;
1096
1097     return info;
1098 }