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_CONFDIR "/qemu.conf",                   true },
 140     { CONFIG_QEMU_CONFDIR "/target-" TARGET_ARCH ".conf", true },
 141     { NULL }, /* end of list */
 142 };
 143
 144
 145 int qemu_read_default_config_files(bool userconfig)
 146 {
 147     int ret;
 148     struct defconfig_file *f;
 149
 150     for (f = default_config_files; f->filename; f++) {
 151         if (!userconfig && f->userconfig) {
 152             continue;
 153         }
 154         ret = qemu_read_config_file(f->filename);
 155         if (ret < 0 && ret != -ENOENT) {
 156             return ret;
 157         }
 158     }
 159
 160     return 0;
 161 }
 162
 163 static int is_dup_page(uint8_t *page)
 164 {
 165     VECTYPE *p = (VECTYPE *)page;
 166     VECTYPE val = SPLAT(page);
 167     int i;
 168
 169     for (i = 0; i < TARGET_PAGE_SIZE / sizeof(VECTYPE); i++) {
 170         if (!ALL_EQ(val, p[i])) {
 171             return 0;
 172         }
 173     }
 174
 175     return 1;
 176 }
 177
 178 /* struct contains XBZRLE cache and a static page
 179    used by the compression */
 180 static struct {
 181     /* buffer used for XBZRLE encoding */
 182     uint8_t *encoded_buf;
 183     /* buffer for storing page content */
 184     uint8_t *current_buf;
 185     /* buffer used for XBZRLE decoding */
 186     uint8_t *decoded_buf;
 187     /* Cache for XBZRLE */
 188     PageCache *cache;
 189 } XBZRLE = {
 190     .encoded_buf = NULL,
 191     .current_buf = NULL,
 192     .decoded_buf = NULL,
 193     .cache = NULL,
 194 };
 195
 196
 197 int64_t xbzrle_cache_resize(int64_t new_size)
 198 {
 199     if (XBZRLE.cache != NULL) {
 200         return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
 201             TARGET_PAGE_SIZE;
 202     }
 203     return pow2floor(new_size);
 204 }
 205
 206 /* accounting for migration statistics */
 207 typedef struct AccountingInfo {
 208     uint64_t dup_pages;
 209     uint64_t norm_pages;
 210     uint64_t iterations;
 211     uint64_t xbzrle_bytes;
 212     uint64_t xbzrle_pages;
 213     uint64_t xbzrle_cache_miss;
 214     uint64_t xbzrle_overflows;
 215 } AccountingInfo;
 216
 217 static AccountingInfo acct_info;
 218
 219 static void acct_clear(void)
 220 {
 221     memset(&acct_info, 0, sizeof(acct_info));
 222 }
 223
 224 uint64_t dup_mig_bytes_transferred(void)
 225 {
 226     return acct_info.dup_pages * TARGET_PAGE_SIZE;
 227 }
 228
 229 uint64_t dup_mig_pages_transferred(void)
 230 {
 231     return acct_info.dup_pages;
 232 }
 233
 234 uint64_t norm_mig_bytes_transferred(void)
 235 {
 236     return acct_info.norm_pages * TARGET_PAGE_SIZE;
 237 }
 238
 239 uint64_t norm_mig_pages_transferred(void)
 240 {
 241     return acct_info.norm_pages;
 242 }
 243
 244 uint64_t xbzrle_mig_bytes_transferred(void)
 245 {
 246     return acct_info.xbzrle_bytes;
 247 }
 248
 249 uint64_t xbzrle_mig_pages_transferred(void)
 250 {
 251     return acct_info.xbzrle_pages;
 252 }
 253
 254 uint64_t xbzrle_mig_pages_cache_miss(void)
 255 {
 256     return acct_info.xbzrle_cache_miss;
 257 }
 258
 259 uint64_t xbzrle_mig_pages_overflow(void)
 260 {
 261     return acct_info.xbzrle_overflows;
 262 }
 263
 264 static void save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
 265         int cont, int flag)
 266 {
 267         qemu_put_be64(f, offset | cont | flag);
 268         if (!cont) {
 269                 qemu_put_byte(f, strlen(block->idstr));
 270                 qemu_put_buffer(f, (uint8_t *)block->idstr,
 271                                 strlen(block->idstr));
 272         }
 273
 274 }
 275
 276 #define ENCODING_FLAG_XBZRLE 0x1
 277
 278 static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
 279                             ram_addr_t current_addr, RAMBlock *block,
 280                             ram_addr_t offset, int cont, bool last_stage)
 281 {
 282     int encoded_len = 0, bytes_sent = -1;
 283     uint8_t *prev_cached_page;
 284
 285     if (!cache_is_cached(XBZRLE.cache, current_addr)) {
 286         if (!last_stage) {
 287             cache_insert(XBZRLE.cache, current_addr,
 288                          g_memdup(current_data, TARGET_PAGE_SIZE));
 289         }
 290         acct_info.xbzrle_cache_miss++;
 291         return -1;
 292     }
 293
 294     prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
 295
 296     /* save current buffer into memory */
 297     memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
 298
 299     /* XBZRLE encoding (if there is no overflow) */
 300     encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
 301                                        TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
 302                                        TARGET_PAGE_SIZE);
 303     if (encoded_len == 0) {
 304         DPRINTF("Skipping unmodified page\n");
 305         return 0;
 306     } else if (encoded_len == -1) {
 307         DPRINTF("Overflow\n");
 308         acct_info.xbzrle_overflows++;
 309         /* update data in the cache */
 310         memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
 311         return -1;
 312     }
 313
 314     /* we need to update the data in the cache, in order to get the same data */
 315     if (!last_stage) {
 316         memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
 317     }
 318
 319     /* Send XBZRLE based compressed page */
 320     save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
 321     qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
 322     qemu_put_be16(f, encoded_len);
 323     qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
 324     bytes_sent = encoded_len + 1 + 2;
 325     acct_info.xbzrle_pages++;
 326     acct_info.xbzrle_bytes += bytes_sent;
 327
 328     return bytes_sent;
 329 }
 330
 331 static RAMBlock *last_block;
 332 static ram_addr_t last_offset;
 333
 334 /*
 335  * ram_save_block: Writes a page of memory to the stream f
 336  *
 337  * Returns:  0: if the page hasn't changed
 338  *          -1: if there are no more dirty pages
 339  *           n: the amount of bytes written in other case
 340  */
 341
 342 static int ram_save_block(QEMUFile *f, bool last_stage)
 343 {
 344     RAMBlock *block = last_block;
 345     ram_addr_t offset = last_offset;
 346     int bytes_sent = -1;
 347     MemoryRegion *mr;
 348     ram_addr_t current_addr;
 349
 350     if (!block)
 351         block = QLIST_FIRST(&ram_list.blocks);
 352
 353     do {
 354         mr = block->mr;
 355         if (memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
 356                                     DIRTY_MEMORY_MIGRATION)) {
 357             uint8_t *p;
 358             int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
 359
 360             memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
 361                                       DIRTY_MEMORY_MIGRATION);
 362
 363             p = memory_region_get_ram_ptr(mr) + offset;
 364
 365             if (is_dup_page(p)) {
 366                 acct_info.dup_pages++;
 367                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_COMPRESS);
 368                 qemu_put_byte(f, *p);
 369                 bytes_sent = 1;
 370             } else if (migrate_use_xbzrle()) {
 371                 current_addr = block->offset + offset;
 372                 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
 373                                               offset, cont, last_stage);
 374                 if (!last_stage) {
 375                     p = get_cached_data(XBZRLE.cache, current_addr);
 376                 }
 377             }
 378
 379             /* either we didn't send yet (we may have had XBZRLE overflow) */
 380             if (bytes_sent == -1) {
 381                 save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
 382                 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
 383                 bytes_sent = TARGET_PAGE_SIZE;
 384                 acct_info.norm_pages++;
 385             }
 386
 387             /* if page is unmodified, continue to the next */
 388             if (bytes_sent != 0) {
 389                 break;
 390             }
 391         }
 392
 393         offset += TARGET_PAGE_SIZE;
 394         if (offset >= block->length) {
 395             offset = 0;
 396             block = QLIST_NEXT(block, next);
 397             if (!block)
 398                 block = QLIST_FIRST(&ram_list.blocks);
 399         }
 400     } while (block != last_block || offset != last_offset);
 401
 402     last_block = block;
 403     last_offset = offset;
 404
 405     return bytes_sent;
 406 }
 407
 408 static uint64_t bytes_transferred;
 409
 410 static ram_addr_t ram_save_remaining(void)
 411 {
 412     return ram_list.dirty_pages;
 413 }
 414
 415 uint64_t ram_bytes_remaining(void)
 416 {
 417     return ram_save_remaining() * TARGET_PAGE_SIZE;
 418 }
 419
 420 uint64_t ram_bytes_transferred(void)
 421 {
 422     return bytes_transferred;
 423 }
 424
 425 uint64_t ram_bytes_total(void)
 426 {
 427     RAMBlock *block;
 428     uint64_t total = 0;
 429
 430     QLIST_FOREACH(block, &ram_list.blocks, next)
 431         total += block->length;
 432
 433     return total;
 434 }
 435
 436 static int block_compar(const void *a, const void *b)
 437 {
 438     RAMBlock * const *ablock = a;
 439     RAMBlock * const *bblock = b;
 440
 441     return strcmp((*ablock)->idstr, (*bblock)->idstr);
 442 }
 443
 444 static void sort_ram_list(void)
 445 {
 446     RAMBlock *block, *nblock, **blocks;
 447     int n;
 448     n = 0;
 449     QLIST_FOREACH(block, &ram_list.blocks, next) {
 450         ++n;
 451     }
 452     blocks = g_malloc(n * sizeof *blocks);
 453     n = 0;
 454     QLIST_FOREACH_SAFE(block, &ram_list.blocks, next, nblock) {
 455         blocks[n++] = block;
 456         QLIST_REMOVE(block, next);
 457     }
 458     qsort(blocks, n, sizeof *blocks, block_compar);
 459     while (--n >= 0) {
 460         QLIST_INSERT_HEAD(&ram_list.blocks, blocks[n], next);
 461     }
 462     g_free(blocks);
 463 }
 464
 465 static void migration_end(void)
 466 {
 467     memory_global_dirty_log_stop();
 468
 469     if (migrate_use_xbzrle()) {
 470         cache_fini(XBZRLE.cache);
 471         g_free(XBZRLE.cache);
 472         g_free(XBZRLE.encoded_buf);
 473         g_free(XBZRLE.current_buf);
 474         g_free(XBZRLE.decoded_buf);
 475         XBZRLE.cache = NULL;
 476     }
 477 }
 478
 479 static void ram_migration_cancel(void *opaque)
 480 {
 481     migration_end();
 482 }
 483
 484
 485 static void reset_ram_globals(void)
 486 {
 487     last_block = NULL;
 488     last_offset = 0;
 489     sort_ram_list();
 490 }
 491
 492 #define MAX_WAIT 50 /* ms, half buffered_file limit */
 493
 494 static int ram_save_setup(QEMUFile *f, void *opaque)
 495 {
 496     ram_addr_t addr;
 497     RAMBlock *block;
 498
 499     bytes_transferred = 0;
 500     reset_ram_globals();
 501
 502     if (migrate_use_xbzrle()) {
 503         XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
 504                                   TARGET_PAGE_SIZE,
 505                                   TARGET_PAGE_SIZE);
 506         if (!XBZRLE.cache) {
 507             DPRINTF("Error creating cache\n");
 508             return -1;
 509         }
 510         XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
 511         XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
 512         acct_clear();
 513     }
 514
 515     /* Make sure all dirty bits are set */
 516     QLIST_FOREACH(block, &ram_list.blocks, next) {
 517         for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
 518             if (!memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE,
 519                                          DIRTY_MEMORY_MIGRATION)) {
 520                 memory_region_set_dirty(block->mr, addr, TARGET_PAGE_SIZE);
 521             }
 522         }
 523     }
 524
 525     memory_global_dirty_log_start();
 526     memory_global_sync_dirty_bitmap(get_system_memory());
 527
 528     qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
 529
 530     QLIST_FOREACH(block, &ram_list.blocks, next) {
 531         qemu_put_byte(f, strlen(block->idstr));
 532         qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
 533         qemu_put_be64(f, block->length);
 534     }
 535
 536     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 537
 538     return 0;
 539 }
 540
 541 static int ram_save_iterate(QEMUFile *f, void *opaque)
 542 {
 543     uint64_t bytes_transferred_last;
 544     double bwidth = 0;
 545     int ret;
 546     int i;
 547     uint64_t expected_downtime;
 548     MigrationState *s = migrate_get_current();
 549
 550     bytes_transferred_last = bytes_transferred;
 551     bwidth = qemu_get_clock_ns(rt_clock);
 552
 553     i = 0;
 554     while ((ret = qemu_file_rate_limit(f)) == 0) {
 555         int bytes_sent;
 556
 557         bytes_sent = ram_save_block(f, false);
 558         /* no more blocks to sent */
 559         if (bytes_sent < 0) {
 560             break;
 561         }
 562         bytes_transferred += bytes_sent;
 563         acct_info.iterations++;
 564         /* we want to check in the 1st loop, just in case it was the 1st time
 565            and we had to sync the dirty bitmap.
 566            qemu_get_clock_ns() is a bit expensive, so we only check each some
 567            iterations
 568         */
 569         if ((i & 63) == 0) {
 570             uint64_t t1 = (qemu_get_clock_ns(rt_clock) - bwidth) / 1000000;
 571             if (t1 > MAX_WAIT) {
 572                 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
 573                         t1, i);
 574                 break;
 575             }
 576         }
 577         i++;
 578     }
 579
 580     if (ret < 0) {
 581         return ret;
 582     }
 583
 584     bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
 585     bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
 586
 587     /* if we haven't transferred anything this round, force
 588      * expected_downtime to a very high value, but without
 589      * crashing */
 590     if (bwidth == 0) {
 591         bwidth = 0.000001;
 592     }
 593
 594     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 595
 596     expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 597     DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(" PRIu64 ")?\n",
 598             expected_downtime, migrate_max_downtime());
 599
 600     if (expected_downtime <= migrate_max_downtime()) {
 601         memory_global_sync_dirty_bitmap(get_system_memory());
 602         expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
 603         s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */
 604
 605         return expected_downtime <= migrate_max_downtime();
 606     }
 607     return 0;
 608 }
 609
 610 static int ram_save_complete(QEMUFile *f, void *opaque)
 611 {
 612     memory_global_sync_dirty_bitmap(get_system_memory());
 613
 614     /* try transferring iterative blocks of memory */
 615
 616     /* flush all remaining blocks regardless of rate limiting */
 617     while (true) {
 618         int bytes_sent;
 619
 620         bytes_sent = ram_save_block(f, true);
 621         /* no more blocks to sent */
 622         if (bytes_sent < 0) {
 623             break;
 624         }
 625         bytes_transferred += bytes_sent;
 626     }
 627     memory_global_dirty_log_stop();
 628
 629     qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
 630
 631     return 0;
 632 }
 633
 634 static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
 635 {
 636     int ret, rc = 0;
 637     unsigned int xh_len;
 638     int xh_flags;
 639
 640     if (!XBZRLE.decoded_buf) {
 641         XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
 642     }
 643
 644     /* extract RLE header */
 645     xh_flags = qemu_get_byte(f);
 646     xh_len = qemu_get_be16(f);
 647
 648     if (xh_flags != ENCODING_FLAG_XBZRLE) {
 649         fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
 650         return -1;
 651     }
 652
 653     if (xh_len > TARGET_PAGE_SIZE) {
 654         fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
 655         return -1;
 656     }
 657     /* load data and decode */
 658     qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);
 659
 660     /* decode RLE */
 661     ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
 662                                TARGET_PAGE_SIZE);
 663     if (ret == -1) {
 664         fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
 665         rc = -1;
 666     } else  if (ret > TARGET_PAGE_SIZE) {
 667         fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
 668                 ret, TARGET_PAGE_SIZE);
 669         abort();
 670     }
 671
 672     return rc;
 673 }
 674
 675 static inline void *host_from_stream_offset(QEMUFile *f,
 676                                             ram_addr_t offset,
 677                                             int flags)
 678 {
 679     static RAMBlock *block = NULL;
 680     char id[256];
 681     uint8_t len;
 682
 683     if (flags & RAM_SAVE_FLAG_CONTINUE) {
 684         if (!block) {
 685             fprintf(stderr, "Ack, bad migration stream!\n");
 686             return NULL;
 687         }
 688
 689         return memory_region_get_ram_ptr(block->mr) + offset;
 690     }
 691
 692     len = qemu_get_byte(f);
 693     qemu_get_buffer(f, (uint8_t *)id, len);
 694     id[len] = 0;
 695
 696     QLIST_FOREACH(block, &ram_list.blocks, next) {
 697         if (!strncmp(id, block->idstr, sizeof(id)))
 698             return memory_region_get_ram_ptr(block->mr) + offset;
 699     }
 700
 701     fprintf(stderr, "Can't find block %s!\n", id);
 702     return NULL;
 703 }
 704
 705 static int ram_load(QEMUFile *f, void *opaque, int version_id)
 706 {
 707     ram_addr_t addr;
 708     int flags, ret = 0;
 709     int error;
 710     static uint64_t seq_iter;
 711
 712     seq_iter++;
 713
 714     if (version_id < 4 || version_id > 4) {
 715         return -EINVAL;
 716     }
 717
 718     do {
 719         addr = qemu_get_be64(f);
 720
 721         flags = addr & ~TARGET_PAGE_MASK;
 722         addr &= TARGET_PAGE_MASK;
 723
 724         if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
 725             if (version_id == 4) {
 726                 /* Synchronize RAM block list */
 727                 char id[256];
 728                 ram_addr_t length;
 729                 ram_addr_t total_ram_bytes = addr;
 730
 731                 while (total_ram_bytes) {
 732                     RAMBlock *block;
 733                     uint8_t len;
 734
 735                     len = qemu_get_byte(f);
 736                     qemu_get_buffer(f, (uint8_t *)id, len);
 737                     id[len] = 0;
 738                     length = qemu_get_be64(f);
 739
 740                     QLIST_FOREACH(block, &ram_list.blocks, next) {
 741                         if (!strncmp(id, block->idstr, sizeof(id))) {
 742                             if (block->length != length) {
 743                                 ret =  -EINVAL;
 744                                 goto done;
 745                             }
 746                             break;
 747                         }
 748                     }
 749
 750                     if (!block) {
 751                         fprintf(stderr, "Unknown ramblock \"%s\", cannot "
 752                                 "accept migration\n", id);
 753                         ret = -EINVAL;
 754                         goto done;
 755                     }
 756
 757                     total_ram_bytes -= length;
 758                 }
 759             }
 760         }
 761
 762         if (flags & RAM_SAVE_FLAG_COMPRESS) {
 763             void *host;
 764             uint8_t ch;
 765
 766             host = host_from_stream_offset(f, addr, flags);
 767             if (!host) {
 768                 return -EINVAL;
 769             }
 770
 771             ch = qemu_get_byte(f);
 772             memset(host, ch, TARGET_PAGE_SIZE);
 773 #ifndef _WIN32
 774             if (ch == 0 &&
 775                 (!kvm_enabled() || kvm_has_sync_mmu())) {
 776                 qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
 777             }
 778 #endif
 779         } else if (flags & RAM_SAVE_FLAG_PAGE) {
 780             void *host;
 781
 782             host = host_from_stream_offset(f, addr, flags);
 783             if (!host) {
 784                 return -EINVAL;
 785             }
 786
 787             qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
 788         } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
 789             if (!migrate_use_xbzrle()) {
 790                 return -EINVAL;
 791             }
 792             void *host = host_from_stream_offset(f, addr, flags);
 793             if (!host) {
 794                 return -EINVAL;
 795             }
 796
 797             if (load_xbzrle(f, addr, host) < 0) {
 798                 ret = -EINVAL;
 799                 goto done;
 800             }
 801         }
 802         error = qemu_file_get_error(f);
 803         if (error) {
 804             ret = error;
 805             goto done;
 806         }
 807     } while (!(flags & RAM_SAVE_FLAG_EOS));
 808
 809 done:
 810     DPRINTF("Completed load of VM with exit code %d seq iteration "
 811             "%" PRIu64 "\n", ret, seq_iter);
 812     return ret;
 813 }
 814
 815 SaveVMHandlers savevm_ram_handlers = {
 816     .save_live_setup = ram_save_setup,
 817     .save_live_iterate = ram_save_iterate,
 818     .save_live_complete = ram_save_complete,
 819     .load_state = ram_load,
 820     .cancel = ram_migration_cancel,
 821 };
 822
 823 #ifdef HAS_AUDIO
 824 struct soundhw {
 825     const char *name;
 826     const char *descr;
 827     int enabled;
 828     int isa;
 829     union {
 830         int (*init_isa) (ISABus *bus);
 831         int (*init_pci) (PCIBus *bus);
 832     } init;
 833 };
 834
 835 static struct soundhw soundhw[] = {
 836 #ifdef HAS_AUDIO_CHOICE
 837 #ifdef CONFIG_PCSPK
 838     {
 839         "pcspk",
 840         "PC speaker",
 841         0,
 842         1,
 843         { .init_isa = pcspk_audio_init }
 844     },
 845 #endif
 846
 847 #ifdef CONFIG_SB16
 848     {
 849         "sb16",
 850         "Creative Sound Blaster 16",
 851         0,
 852         1,
 853         { .init_isa = SB16_init }
 854     },
 855 #endif
 856
 857 #ifdef CONFIG_CS4231A
 858     {
 859         "cs4231a",
 860         "CS4231A",
 861         0,
 862         1,
 863         { .init_isa = cs4231a_init }
 864     },
 865 #endif
 866
 867 #ifdef CONFIG_ADLIB
 868     {
 869         "adlib",
 870 #ifdef HAS_YMF262
 871         "Yamaha YMF262 (OPL3)",
 872 #else
 873         "Yamaha YM3812 (OPL2)",
 874 #endif
 875         0,
 876         1,
 877         { .init_isa = Adlib_init }
 878     },
 879 #endif
 880
 881 #ifdef CONFIG_GUS
 882     {
 883         "gus",
 884         "Gravis Ultrasound GF1",
 885         0,
 886         1,
 887         { .init_isa = GUS_init }
 888     },
 889 #endif
 890
 891 #ifdef CONFIG_AC97
 892     {
 893         "ac97",
 894         "Intel 82801AA AC97 Audio",
 895         0,
 896         0,
 897         { .init_pci = ac97_init }
 898     },
 899 #endif
 900
 901 #ifdef CONFIG_ES1370
 902     {
 903         "es1370",
 904         "ENSONIQ AudioPCI ES1370",
 905         0,
 906         0,
 907         { .init_pci = es1370_init }
 908     },
 909 #endif
 910
 911 #ifdef CONFIG_HDA
 912     {
 913         "hda",
 914         "Intel HD Audio",
 915         0,
 916         0,
 917         { .init_pci = intel_hda_and_codec_init }
 918     },
 919 #endif
 920
 921 #endif /* HAS_AUDIO_CHOICE */
 922
 923     { NULL, NULL, 0, 0, { NULL } }
 924 };
 925
 926 void select_soundhw(const char *optarg)
 927 {
 928     struct soundhw *c;
 929
 930     if (is_help_option(optarg)) {
 931     show_valid_cards:
 932
 933 #ifdef HAS_AUDIO_CHOICE
 934         printf("Valid sound card names (comma separated):\n");
 935         for (c = soundhw; c->name; ++c) {
 936             printf ("%-11s %s\n", c->name, c->descr);
 937         }
 938         printf("\n-soundhw all will enable all of the above\n");
 939 #else
 940         printf("Machine has no user-selectable audio hardware "
 941                "(it may or may not have always-present audio hardware).\n");
 942 #endif
 943         exit(!is_help_option(optarg));
 944     }
 945     else {
 946         size_t l;
 947         const char *p;
 948         char *e;
 949         int bad_card = 0;
 950
 951         if (!strcmp(optarg, "all")) {
 952             for (c = soundhw; c->name; ++c) {
 953                 c->enabled = 1;
 954             }
 955             return;
 956         }
 957
 958         p = optarg;
 959         while (*p) {
 960             e = strchr(p, ',');
 961             l = !e ? strlen(p) : (size_t) (e - p);
 962
 963             for (c = soundhw; c->name; ++c) {
 964                 if (!strncmp(c->name, p, l) && !c->name[l]) {
 965                     c->enabled = 1;
 966                     break;
 967                 }
 968             }
 969
 970             if (!c->name) {
 971                 if (l > 80) {
 972                     fprintf(stderr,
 973                             "Unknown sound card name (too big to show)\n");
 974                 }
 975                 else {
 976                     fprintf(stderr, "Unknown sound card name `%.*s'\n",
 977                             (int) l, p);
 978                 }
 979                 bad_card = 1;
 980             }
 981             p += l + (e != NULL);
 982         }
 983
 984         if (bad_card) {
 985             goto show_valid_cards;
 986         }
 987     }
 988 }
 989
 990 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
 991 {
 992     struct soundhw *c;
 993
 994     for (c = soundhw; c->name; ++c) {
 995         if (c->enabled) {
 996             if (c->isa) {
 997                 if (isa_bus) {
 998                     c->init.init_isa(isa_bus);
 999                 }
1000             } else {
1001                 if (pci_bus) {
1002                     c->init.init_pci(pci_bus);
1003                 }
1004             }
1005         }
1006     }
1007 }
1008 #else
1009 void select_soundhw(const char *optarg)
1010 {
1011 }
1012 void audio_init(ISABus *isa_bus, PCIBus *pci_bus)
1013 {
1014 }
1015 #endif
1016
1017 int qemu_uuid_parse(const char *str, uint8_t *uuid)
1018 {
1019     int ret;
1020
1021     if (strlen(str) != 36) {
1022         return -1;
1023     }
1024
1025     ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1026                  &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1027                  &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1028                  &uuid[15]);
1029
1030     if (ret != 16) {
1031         return -1;
1032     }
1033 #ifdef TARGET_I386
1034     smbios_add_field(1, offsetof(struct smbios_type_1, uuid), 16, uuid);
1035 #endif
1036     return 0;
1037 }
1038
1039 void do_acpitable_option(const char *optarg)
1040 {
1041 #ifdef TARGET_I386
1042     if (acpi_table_add(optarg) < 0) {
1043         fprintf(stderr, "Wrong acpi table provided\n");
1044         exit(1);
1045     }
1046 #endif
1047 }
1048
1049 void do_smbios_option(const char *optarg)
1050 {
1051 #ifdef TARGET_I386
1052     if (smbios_entry_add(optarg) < 0) {
1053         fprintf(stderr, "Wrong smbios provided\n");
1054         exit(1);
1055     }
1056 #endif
1057 }
1058
1059 void cpudef_init(void)
1060 {
1061 #if defined(cpudef_setup)
1062     cpudef_setup(); /* parse cpu definitions in target config file */
1063 #endif
1064 }
1065
1066 int audio_available(void)
1067 {
1068 #ifdef HAS_AUDIO
1069     return 1;
1070 #else
1071     return 0;
1072 #endif
1073 }
1074
1075 int tcg_available(void)
1076 {
1077     return 1;
1078 }
1079
1080 int kvm_available(void)
1081 {
1082 #ifdef CONFIG_KVM
1083     return 1;
1084 #else
1085     return 0;
1086 #endif
1087 }
1088
1089 int xen_available(void)
1090 {
1091 #ifdef CONFIG_XEN
1092     return 1;
1093 #else
1094     return 0;
1095 #endif
1096 }
1097
1098
1099 TargetInfo *qmp_query_target(Error **errp)
1100 {
1101     TargetInfo *info = g_malloc0(sizeof(*info));
1102
1103     info->arch = TARGET_TYPE;
1104
1105     return info;
1106 }