arch_init.c 29.4 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include <stdint.h>
#include <stdarg.h>
26
#include <stdlib.h>
27
#ifndef _WIN32
28
#include <sys/types.h>
29 30 31
#include <sys/mman.h>
#endif
#include "config.h"
32
#include "monitor/monitor.h"
33
#include "sysemu/sysemu.h"
34 35
#include "qemu/bitops.h"
#include "qemu/bitmap.h"
36
#include "sysemu/arch_init.h"
37
#include "audio/audio.h"
Paolo Bonzini's avatar
Paolo Bonzini committed
38
#include "hw/i386/pc.h"
39
#include "hw/pci/pci.h"
Paolo Bonzini's avatar
Paolo Bonzini committed
40
#include "hw/audio/audio.h"
41
#include "sysemu/kvm.h"
42
#include "migration/migration.h"
Paolo Bonzini's avatar
Paolo Bonzini committed
43
#include "hw/i386/smbios.h"
44
#include "exec/address-spaces.h"
Paolo Bonzini's avatar
Paolo Bonzini committed
45
#include "hw/audio/pcspk.h"
46
#include "migration/page_cache.h"
47
#include "qemu/config-file.h"
48
#include "qmp-commands.h"
49
#include "trace.h"
50
#include "exec/cpu-all.h"
51
#include "hw/acpi/acpi.h"
52

Orit Wasserman's avatar
Orit Wasserman committed
53 54 55 56 57 58 59 60
#ifdef DEBUG_ARCH_INIT
#define DPRINTF(fmt, ...) \
    do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
    do { } while (0)
#endif

61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
#ifdef TARGET_SPARC
int graphic_width = 1024;
int graphic_height = 768;
int graphic_depth = 8;
#else
int graphic_width = 800;
int graphic_height = 600;
int graphic_depth = 15;
#endif


#if defined(TARGET_ALPHA)
#define QEMU_ARCH QEMU_ARCH_ALPHA
#elif defined(TARGET_ARM)
#define QEMU_ARCH QEMU_ARCH_ARM
#elif defined(TARGET_CRIS)
#define QEMU_ARCH QEMU_ARCH_CRIS
#elif defined(TARGET_I386)
#define QEMU_ARCH QEMU_ARCH_I386
#elif defined(TARGET_M68K)
#define QEMU_ARCH QEMU_ARCH_M68K
Michael Walle's avatar
Michael Walle committed
82 83
#elif defined(TARGET_LM32)
#define QEMU_ARCH QEMU_ARCH_LM32
84 85 86 87
#elif defined(TARGET_MICROBLAZE)
#define QEMU_ARCH QEMU_ARCH_MICROBLAZE
#elif defined(TARGET_MIPS)
#define QEMU_ARCH QEMU_ARCH_MIPS
88 89
#elif defined(TARGET_MOXIE)
#define QEMU_ARCH QEMU_ARCH_MOXIE
90 91
#elif defined(TARGET_OPENRISC)
#define QEMU_ARCH QEMU_ARCH_OPENRISC
92 93 94 95 96 97 98 99
#elif defined(TARGET_PPC)
#define QEMU_ARCH QEMU_ARCH_PPC
#elif defined(TARGET_S390X)
#define QEMU_ARCH QEMU_ARCH_S390X
#elif defined(TARGET_SH4)
#define QEMU_ARCH QEMU_ARCH_SH4
#elif defined(TARGET_SPARC)
#define QEMU_ARCH QEMU_ARCH_SPARC
Max Filippov's avatar
Max Filippov committed
100 101
#elif defined(TARGET_XTENSA)
#define QEMU_ARCH QEMU_ARCH_XTENSA
102 103
#elif defined(TARGET_UNICORE32)
#define QEMU_ARCH QEMU_ARCH_UNICORE32
104 105 106 107 108 109 110
#endif

const uint32_t arch_type = QEMU_ARCH;

/***********************************************************/
/* ram save/restore */

111 112 113 114 115 116
#define RAM_SAVE_FLAG_FULL     0x01 /* Obsolete, not used anymore */
#define RAM_SAVE_FLAG_COMPRESS 0x02
#define RAM_SAVE_FLAG_MEM_SIZE 0x04
#define RAM_SAVE_FLAG_PAGE     0x08
#define RAM_SAVE_FLAG_EOS      0x10
#define RAM_SAVE_FLAG_CONTINUE 0x20
117
#define RAM_SAVE_FLAG_XBZRLE   0x40
118

119

120 121
static struct defconfig_file {
    const char *filename;
122 123
    /* Indicates it is an user config file (disabled by -no-user-config) */
    bool userconfig;
124
} default_config_files[] = {
125
    { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
126
    { CONFIG_QEMU_CONFDIR "/target-" TARGET_NAME ".conf", true },
127 128 129 130
    { NULL }, /* end of list */
};


131
int qemu_read_default_config_files(bool userconfig)
132 133
{
    int ret;
134
    struct defconfig_file *f;
135

136
    for (f = default_config_files; f->filename; f++) {
137 138 139
        if (!userconfig && f->userconfig) {
            continue;
        }
140 141 142 143
        ret = qemu_read_config_file(f->filename);
        if (ret < 0 && ret != -ENOENT) {
            return ret;
        }
144
    }
Laszlo Ersek's avatar
Laszlo Ersek committed
145

146 147 148
    return 0;
}

149
static inline bool is_zero_page(uint8_t *p)
150
{
151 152
    return buffer_find_nonzero_offset(p, TARGET_PAGE_SIZE) ==
        TARGET_PAGE_SIZE;
153 154
}

155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172
/* struct contains XBZRLE cache and a static page
   used by the compression */
static struct {
    /* buffer used for XBZRLE encoding */
    uint8_t *encoded_buf;
    /* buffer for storing page content */
    uint8_t *current_buf;
    /* buffer used for XBZRLE decoding */
    uint8_t *decoded_buf;
    /* Cache for XBZRLE */
    PageCache *cache;
} XBZRLE = {
    .encoded_buf = NULL,
    .current_buf = NULL,
    .decoded_buf = NULL,
    .cache = NULL,
};

173 174 175 176 177 178 179 180 181 182

int64_t xbzrle_cache_resize(int64_t new_size)
{
    if (XBZRLE.cache != NULL) {
        return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
            TARGET_PAGE_SIZE;
    }
    return pow2floor(new_size);
}

183 184 185
/* accounting for migration statistics */
typedef struct AccountingInfo {
    uint64_t dup_pages;
186
    uint64_t skipped_pages;
187 188
    uint64_t norm_pages;
    uint64_t iterations;
Orit Wasserman's avatar
Orit Wasserman committed
189 190 191 192
    uint64_t xbzrle_bytes;
    uint64_t xbzrle_pages;
    uint64_t xbzrle_cache_miss;
    uint64_t xbzrle_overflows;
193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
} AccountingInfo;

static AccountingInfo acct_info;

static void acct_clear(void)
{
    memset(&acct_info, 0, sizeof(acct_info));
}

uint64_t dup_mig_bytes_transferred(void)
{
    return acct_info.dup_pages * TARGET_PAGE_SIZE;
}

uint64_t dup_mig_pages_transferred(void)
{
    return acct_info.dup_pages;
}

212 213 214 215 216 217 218 219 220 221
uint64_t skipped_mig_bytes_transferred(void)
{
    return acct_info.skipped_pages * TARGET_PAGE_SIZE;
}

uint64_t skipped_mig_pages_transferred(void)
{
    return acct_info.skipped_pages;
}

222 223 224 225 226 227 228 229 230 231
uint64_t norm_mig_bytes_transferred(void)
{
    return acct_info.norm_pages * TARGET_PAGE_SIZE;
}

uint64_t norm_mig_pages_transferred(void)
{
    return acct_info.norm_pages;
}

Orit Wasserman's avatar
Orit Wasserman committed
232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251
uint64_t xbzrle_mig_bytes_transferred(void)
{
    return acct_info.xbzrle_bytes;
}

uint64_t xbzrle_mig_pages_transferred(void)
{
    return acct_info.xbzrle_pages;
}

uint64_t xbzrle_mig_pages_cache_miss(void)
{
    return acct_info.xbzrle_cache_miss;
}

uint64_t xbzrle_mig_pages_overflow(void)
{
    return acct_info.xbzrle_overflows;
}

252 253
static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
                             int cont, int flag)
Orit Wasserman's avatar
Orit Wasserman committed
254
{
255 256 257 258
    size_t size;

    qemu_put_be64(f, offset | cont | flag);
    size = 8;
Orit Wasserman's avatar
Orit Wasserman committed
259

260 261 262 263 264 265 266
    if (!cont) {
        qemu_put_byte(f, strlen(block->idstr));
        qemu_put_buffer(f, (uint8_t *)block->idstr,
                        strlen(block->idstr));
        size += 1 + strlen(block->idstr);
    }
    return size;
Orit Wasserman's avatar
Orit Wasserman committed
267 268
}

269 270 271 272
#define ENCODING_FLAG_XBZRLE 0x1

static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
                            ram_addr_t current_addr, RAMBlock *block,
273
                            ram_addr_t offset, int cont, bool last_stage)
274 275 276 277 278
{
    int encoded_len = 0, bytes_sent = -1;
    uint8_t *prev_cached_page;

    if (!cache_is_cached(XBZRLE.cache, current_addr)) {
279
        if (!last_stage) {
280
            cache_insert(XBZRLE.cache, current_addr, current_data);
281
        }
Orit Wasserman's avatar
Orit Wasserman committed
282
        acct_info.xbzrle_cache_miss++;
283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
        return -1;
    }

    prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);

    /* save current buffer into memory */
    memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);

    /* XBZRLE encoding (if there is no overflow) */
    encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
                                       TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
                                       TARGET_PAGE_SIZE);
    if (encoded_len == 0) {
        DPRINTF("Skipping unmodified page\n");
        return 0;
    } else if (encoded_len == -1) {
        DPRINTF("Overflow\n");
Orit Wasserman's avatar
Orit Wasserman committed
300
        acct_info.xbzrle_overflows++;
301 302 303 304 305 306
        /* update data in the cache */
        memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
        return -1;
    }

    /* we need to update the data in the cache, in order to get the same data */
307 308 309
    if (!last_stage) {
        memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
    }
310 311

    /* Send XBZRLE based compressed page */
312
    bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
313 314 315
    qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
    qemu_put_be16(f, encoded_len);
    qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
316
    bytes_sent += encoded_len + 1 + 2;
Orit Wasserman's avatar
Orit Wasserman committed
317 318
    acct_info.xbzrle_pages++;
    acct_info.xbzrle_bytes += bytes_sent;
319 320 321 322

    return bytes_sent;
}

323 324 325 326

/* This is the last block that we have visited serching for dirty pages
 */
static RAMBlock *last_seen_block;
Juan Quintela's avatar
Juan Quintela committed
327 328
/* This is the last block from where we have sent data */
static RAMBlock *last_sent_block;
329
static ram_addr_t last_offset;
Juan Quintela's avatar
Juan Quintela committed
330 331
static unsigned long *migration_bitmap;
static uint64_t migration_dirty_pages;
332
static uint32_t last_version;
333
static bool ram_bulk_stage;
334

335 336 337
static inline
ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
                                                 ram_addr_t start)
338
{
339 340 341
    unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
    unsigned long nr = base + (start >> TARGET_PAGE_BITS);
    unsigned long size = base + (int128_get64(mr->size) >> TARGET_PAGE_BITS);
Juan Quintela's avatar
Juan Quintela committed
342

343 344 345 346 347 348 349
    unsigned long next;

    if (ram_bulk_stage && nr > base) {
        next = nr + 1;
    } else {
        next = find_next_bit(migration_bitmap, size, nr);
    }
350

351 352
    if (next < size) {
        clear_bit(next, migration_bitmap);
Juan Quintela's avatar
Juan Quintela committed
353
        migration_dirty_pages--;
354
    }
355
    return (next - base) << TARGET_PAGE_BITS;
356 357
}

Juan Quintela's avatar
Juan Quintela committed
358 359
static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
                                              ram_addr_t offset)
360
{
Juan Quintela's avatar
Juan Quintela committed
361 362
    bool ret;
    int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
363

Juan Quintela's avatar
Juan Quintela committed
364 365 366 367
    ret = test_and_set_bit(nr, migration_bitmap);

    if (!ret) {
        migration_dirty_pages++;
368
    }
Juan Quintela's avatar
Juan Quintela committed
369
    return ret;
370 371
}

372 373
/* Needs iothread lock! */

374 375
static void migration_bitmap_sync(void)
{
Juan Quintela's avatar
Juan Quintela committed
376 377 378
    RAMBlock *block;
    ram_addr_t addr;
    uint64_t num_dirty_pages_init = migration_dirty_pages;
379 380 381 382 383 384 385 386
    MigrationState *s = migrate_get_current();
    static int64_t start_time;
    static int64_t num_dirty_pages_period;
    int64_t end_time;

    if (!start_time) {
        start_time = qemu_get_clock_ms(rt_clock);
    }
387 388

    trace_migration_bitmap_sync_start();
389
    address_space_sync_dirty_bitmap(&address_space_memory);
Juan Quintela's avatar
Juan Quintela committed
390

391
    QTAILQ_FOREACH(block, &ram_list.blocks, next) {
Juan Quintela's avatar
Juan Quintela committed
392
        for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
393 394 395
            if (memory_region_test_and_clear_dirty(block->mr,
                                                   addr, TARGET_PAGE_SIZE,
                                                   DIRTY_MEMORY_MIGRATION)) {
Juan Quintela's avatar
Juan Quintela committed
396 397 398 399 400
                migration_bitmap_set_dirty(block->mr, addr);
            }
        }
    }
    trace_migration_bitmap_sync_end(migration_dirty_pages
401
                                    - num_dirty_pages_init);
402 403 404 405 406 407 408
    num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
    end_time = qemu_get_clock_ms(rt_clock);

    /* more than 1 second = 1000 millisecons */
    if (end_time > start_time + 1000) {
        s->dirty_pages_rate = num_dirty_pages_period * 1000
            / (end_time - start_time);
409
        s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
410 411 412
        start_time = end_time;
        num_dirty_pages_period = 0;
    }
413 414
}

415 416 417
/*
 * ram_save_block: Writes a page of memory to the stream f
 *
418 419
 * Returns:  The number of bytes written.
 *           0 means no dirty pages
420 421
 */

422
static int ram_save_block(QEMUFile *f, bool last_stage)
423
{
424
    RAMBlock *block = last_seen_block;
425
    ram_addr_t offset = last_offset;
426
    bool complete_round = false;
427
    int bytes_sent = 0;
Avi Kivity's avatar
Avi Kivity committed
428
    MemoryRegion *mr;
429
    ram_addr_t current_addr;
430

431
    if (!block)
432
        block = QTAILQ_FIRST(&ram_list.blocks);
433

434
    while (true) {
Avi Kivity's avatar
Avi Kivity committed
435
        mr = block->mr;
436 437 438 439 440 441 442 443 444 445 446
        offset = migration_bitmap_find_and_reset_dirty(mr, offset);
        if (complete_round && block == last_seen_block &&
            offset >= last_offset) {
            break;
        }
        if (offset >= block->length) {
            offset = 0;
            block = QTAILQ_NEXT(block, next);
            if (!block) {
                block = QTAILQ_FIRST(&ram_list.blocks);
                complete_round = true;
447
                ram_bulk_stage = false;
448 449
            }
        } else {
450
            uint8_t *p;
Juan Quintela's avatar
Juan Quintela committed
451
            int cont = (block == last_sent_block) ?
452
                RAM_SAVE_FLAG_CONTINUE : 0;
453

Avi Kivity's avatar
Avi Kivity committed
454
            p = memory_region_get_ram_ptr(mr) + offset;
455

456 457
            /* In doubt sent page as normal */
            bytes_sent = -1;
458
            if (is_zero_page(p)) {
459
                acct_info.dup_pages++;
460 461 462 463
                bytes_sent = save_block_hdr(f, block, offset, cont,
                                            RAM_SAVE_FLAG_COMPRESS);
                qemu_put_byte(f, 0);
                bytes_sent++;
464
            } else if (!ram_bulk_stage && migrate_use_xbzrle()) {
465 466
                current_addr = block->offset + offset;
                bytes_sent = save_xbzrle_page(f, p, current_addr, block,
467 468 469 470
                                              offset, cont, last_stage);
                if (!last_stage) {
                    p = get_cached_data(XBZRLE.cache, current_addr);
                }
471 472
            }

473
            /* XBZRLE overflow or normal page */
474
            if (bytes_sent == -1) {
475
                bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
476
                qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE);
477
                bytes_sent += TARGET_PAGE_SIZE;
478
                acct_info.norm_pages++;
479 480
            }

481
            /* if page is unmodified, continue to the next */
482
            if (bytes_sent > 0) {
Juan Quintela's avatar
Juan Quintela committed
483
                last_sent_block = block;
484 485
                break;
            }
486
        }
487
    }
488
    last_seen_block = block;
489
    last_offset = offset;
490

491
    return bytes_sent;
492 493 494 495
}

static uint64_t bytes_transferred;

496 497 498 499 500 501 502 503 504 505 506 507
void acct_update_position(QEMUFile *f, size_t size, bool zero)
{
    uint64_t pages = size / TARGET_PAGE_SIZE;
    if (zero) {
        acct_info.dup_pages += pages;
    } else {
        acct_info.norm_pages += pages;
        bytes_transferred += size;
        qemu_update_position(f, size);
    }
}

508 509
static ram_addr_t ram_save_remaining(void)
{
Juan Quintela's avatar
Juan Quintela committed
510
    return migration_dirty_pages;
511 512 513 514 515 516 517 518 519 520 521 522 523 524
}

uint64_t ram_bytes_remaining(void)
{
    return ram_save_remaining() * TARGET_PAGE_SIZE;
}

uint64_t ram_bytes_transferred(void)
{
    return bytes_transferred;
}

uint64_t ram_bytes_total(void)
{
525 526 527
    RAMBlock *block;
    uint64_t total = 0;

528
    QTAILQ_FOREACH(block, &ram_list.blocks, next)
529 530 531
        total += block->length;

    return total;
532 533
}

Orit Wasserman's avatar
Orit Wasserman committed
534 535
static void migration_end(void)
{
536 537 538 539 540
    if (migration_bitmap) {
        memory_global_dirty_log_stop();
        g_free(migration_bitmap);
        migration_bitmap = NULL;
    }
541

542
    if (XBZRLE.cache) {
543 544 545 546 547 548 549
        cache_fini(XBZRLE.cache);
        g_free(XBZRLE.cache);
        g_free(XBZRLE.encoded_buf);
        g_free(XBZRLE.current_buf);
        g_free(XBZRLE.decoded_buf);
        XBZRLE.cache = NULL;
    }
Orit Wasserman's avatar
Orit Wasserman committed
550 551
}

552 553 554 555 556
static void ram_migration_cancel(void *opaque)
{
    migration_end();
}

557 558
static void reset_ram_globals(void)
{
559
    last_seen_block = NULL;
Juan Quintela's avatar
Juan Quintela committed
560
    last_sent_block = NULL;
561
    last_offset = 0;
562
    last_version = ram_list.version;
563
    ram_bulk_stage = true;
564 565
}

566 567
#define MAX_WAIT 50 /* ms, half buffered_file limit */

568
static int ram_save_setup(QEMUFile *f, void *opaque)
569
{
570
    RAMBlock *block;
Juan Quintela's avatar
Juan Quintela committed
571 572 573
    int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;

    migration_bitmap = bitmap_new(ram_pages);
574
    bitmap_set(migration_bitmap, 0, ram_pages);
Juan Quintela's avatar
Juan Quintela committed
575
    migration_dirty_pages = ram_pages;
576

577 578 579 580 581 582 583 584 585 586
    if (migrate_use_xbzrle()) {
        XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
                                  TARGET_PAGE_SIZE,
                                  TARGET_PAGE_SIZE);
        if (!XBZRLE.cache) {
            DPRINTF("Error creating cache\n");
            return -1;
        }
        XBZRLE.encoded_buf = g_malloc0(TARGET_PAGE_SIZE);
        XBZRLE.current_buf = g_malloc(TARGET_PAGE_SIZE);
587
        acct_clear();
588 589
    }

590 591 592 593 594
    qemu_mutex_lock_iothread();
    qemu_mutex_lock_ramlist();
    bytes_transferred = 0;
    reset_ram_globals();

595
    memory_global_dirty_log_start();
Juan Quintela's avatar
Juan Quintela committed
596
    migration_bitmap_sync();
597
    qemu_mutex_unlock_iothread();
598

599
    qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
600

601
    QTAILQ_FOREACH(block, &ram_list.blocks, next) {
602 603 604
        qemu_put_byte(f, strlen(block->idstr));
        qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
        qemu_put_be64(f, block->length);
605 606
    }

607
    qemu_mutex_unlock_ramlist();
608 609 610 611 612
    qemu_put_be64(f, RAM_SAVE_FLAG_EOS);

    return 0;
}

613
static int ram_save_iterate(QEMUFile *f, void *opaque)
614 615 616
{
    int ret;
    int i;
617
    int64_t t0;
618
    int total_sent = 0;
619

620 621
    qemu_mutex_lock_ramlist();

622 623 624 625
    if (ram_list.version != last_version) {
        reset_ram_globals();
    }

626
    t0 = qemu_get_clock_ns(rt_clock);
627
    i = 0;
628
    while ((ret = qemu_file_rate_limit(f)) == 0) {
629
        int bytes_sent;
630

631
        bytes_sent = ram_save_block(f, false);
632
        /* no more blocks to sent */
633
        if (bytes_sent == 0) {
634 635
            break;
        }
636
        total_sent += bytes_sent;
637
        acct_info.iterations++;
638 639 640 641 642 643
        /* we want to check in the 1st loop, just in case it was the 1st time
           and we had to sync the dirty bitmap.
           qemu_get_clock_ns() is a bit expensive, so we only check each some
           iterations
        */
        if ((i & 63) == 0) {
644
            uint64_t t1 = (qemu_get_clock_ns(rt_clock) - t0) / 1000000;
645
            if (t1 > MAX_WAIT) {
646
                DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
647 648 649 650 651
                        t1, i);
                break;
            }
        }
        i++;
652 653
    }

654 655
    qemu_mutex_unlock_ramlist();

656
    if (ret < 0) {
657
        bytes_transferred += total_sent;
658 659 660
        return ret;
    }

661
    qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
662 663
    total_sent += 8;
    bytes_transferred += total_sent;
664

665
    return total_sent;
666 667 668 669
}

static int ram_save_complete(QEMUFile *f, void *opaque)
{
670
    qemu_mutex_lock_ramlist();
671
    migration_bitmap_sync();
672

673
    /* try transferring iterative blocks of memory */
Orit Wasserman's avatar
Orit Wasserman committed
674

675
    /* flush all remaining blocks regardless of rate limiting */
676
    while (true) {
677 678
        int bytes_sent;

679
        bytes_sent = ram_save_block(f, true);
680
        /* no more blocks to sent */
681
        if (bytes_sent == 0) {
682
            break;
683
        }
684
        bytes_transferred += bytes_sent;
685
    }
686
    migration_end();
687

688
    qemu_mutex_unlock_ramlist();
689 690
    qemu_put_be64(f, RAM_SAVE_FLAG_EOS);

691
    return 0;
692 693
}

694 695 696 697 698 699 700
static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
{
    uint64_t remaining_size;

    remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;

    if (remaining_size < max_size) {
701
        qemu_mutex_lock_iothread();
702
        migration_bitmap_sync();
703
        qemu_mutex_unlock_iothread();
704 705 706 707 708
        remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
    }
    return remaining_size;
}

709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749
static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
{
    int ret, rc = 0;
    unsigned int xh_len;
    int xh_flags;

    if (!XBZRLE.decoded_buf) {
        XBZRLE.decoded_buf = g_malloc(TARGET_PAGE_SIZE);
    }

    /* extract RLE header */
    xh_flags = qemu_get_byte(f);
    xh_len = qemu_get_be16(f);

    if (xh_flags != ENCODING_FLAG_XBZRLE) {
        fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
        return -1;
    }

    if (xh_len > TARGET_PAGE_SIZE) {
        fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
        return -1;
    }
    /* load data and decode */
    qemu_get_buffer(f, XBZRLE.decoded_buf, xh_len);

    /* decode RLE */
    ret = xbzrle_decode_buffer(XBZRLE.decoded_buf, xh_len, host,
                               TARGET_PAGE_SIZE);
    if (ret == -1) {
        fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
        rc = -1;
    } else  if (ret > TARGET_PAGE_SIZE) {
        fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
                ret, TARGET_PAGE_SIZE);
        abort();
    }

    return rc;
}

750 751 752 753 754 755 756 757 758 759 760 761 762 763
static inline void *host_from_stream_offset(QEMUFile *f,
                                            ram_addr_t offset,
                                            int flags)
{
    static RAMBlock *block = NULL;
    char id[256];
    uint8_t len;

    if (flags & RAM_SAVE_FLAG_CONTINUE) {
        if (!block) {
            fprintf(stderr, "Ack, bad migration stream!\n");
            return NULL;
        }

764
        return memory_region_get_ram_ptr(block->mr) + offset;
765 766 767 768 769 770
    }

    len = qemu_get_byte(f);
    qemu_get_buffer(f, (uint8_t *)id, len);
    id[len] = 0;

771
    QTAILQ_FOREACH(block, &ram_list.blocks, next) {
772
        if (!strncmp(id, block->idstr, sizeof(id)))
773
            return memory_region_get_ram_ptr(block->mr) + offset;
774 775 776 777 778 779
    }

    fprintf(stderr, "Can't find block %s!\n", id);
    return NULL;
}

780
static int ram_load(QEMUFile *f, void *opaque, int version_id)
781 782
{
    ram_addr_t addr;
Orit Wasserman's avatar
Orit Wasserman committed
783
    int flags, ret = 0;
784
    int error;
Orit Wasserman's avatar
Orit Wasserman committed
785 786 787
    static uint64_t seq_iter;

    seq_iter++;
788

789
    if (version_id < 4 || version_id > 4) {
790 791 792 793 794 795 796 797 798 799
        return -EINVAL;
    }

    do {
        addr = qemu_get_be64(f);

        flags = addr & ~TARGET_PAGE_MASK;
        addr &= TARGET_PAGE_MASK;

        if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
800
            if (version_id == 4) {
801 802 803 804 805 806 807 808 809 810 811 812 813 814
                /* Synchronize RAM block list */
                char id[256];
                ram_addr_t length;
                ram_addr_t total_ram_bytes = addr;

                while (total_ram_bytes) {
                    RAMBlock *block;
                    uint8_t len;

                    len = qemu_get_byte(f);
                    qemu_get_buffer(f, (uint8_t *)id, len);
                    id[len] = 0;
                    length = qemu_get_be64(f);

815
                    QTAILQ_FOREACH(block, &ram_list.blocks, next) {
816
                        if (!strncmp(id, block->idstr, sizeof(id))) {
Orit Wasserman's avatar
Orit Wasserman committed
817
                            if (block->length != length) {
818 819 820
                                fprintf(stderr,
                                        "Length mismatch: %s: " RAM_ADDR_FMT
                                        " in != " RAM_ADDR_FMT "\n", id, length,
821
                                        block->length);
Orit Wasserman's avatar
Orit Wasserman committed
822 823 824
                                ret =  -EINVAL;
                                goto done;
                            }
825 826 827 828 829
                            break;
                        }
                    }

                    if (!block) {
830 831
                        fprintf(stderr, "Unknown ramblock \"%s\", cannot "
                                "accept migration\n", id);
Orit Wasserman's avatar
Orit Wasserman committed
832 833
                        ret = -EINVAL;
                        goto done;
834 835 836 837
                    }

                    total_ram_bytes -= length;
                }
838 839 840 841
            }
        }

        if (flags & RAM_SAVE_FLAG_COMPRESS) {
842 843 844
            void *host;
            uint8_t ch;

845
            host = host_from_stream_offset(f, addr, flags);
846 847 848
            if (!host) {
                return -EINVAL;
            }
849 850

            ch = qemu_get_byte(f);
851 852
            if (ch != 0 || !is_zero_page(host)) {
                memset(host, ch, TARGET_PAGE_SIZE);
853
#ifndef _WIN32
854 855 856 857 858
                if (ch == 0 &&
                    (!kvm_enabled() || kvm_has_sync_mmu()) &&
                    getpagesize() <= TARGET_PAGE_SIZE) {
                    qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
                }
859
#endif
860
            }
861
        } else if (flags & RAM_SAVE_FLAG_PAGE) {
862 863
            void *host;

864
            host = host_from_stream_offset(f, addr, flags);
865 866 867
            if (!host) {
                return -EINVAL;
            }
868 869

            qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
870 871 872 873 874 875 876 877 878 879
        } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
            void *host = host_from_stream_offset(f, addr, flags);
            if (!host) {
                return -EINVAL;
            }

            if (load_xbzrle(f, addr, host) < 0) {
                ret = -EINVAL;
                goto done;
            }
880
        }
881 882
        error = qemu_file_get_error(f);
        if (error) {
Orit Wasserman's avatar
Orit Wasserman committed
883 884
            ret = error;
            goto done;
885 886 887
        }
    } while (!(flags & RAM_SAVE_FLAG_EOS));

Orit Wasserman's avatar
Orit Wasserman committed
888
done:
889 890
    DPRINTF("Completed load of VM with exit code %d seq iteration "
            "%" PRIu64 "\n", ret, seq_iter);
Orit Wasserman's avatar
Orit Wasserman committed
891
    return ret;
892 893
}

894
SaveVMHandlers savevm_ram_handlers = {
895
    .save_live_setup = ram_save_setup,
896 897
    .save_live_iterate = ram_save_iterate,
    .save_live_complete = ram_save_complete,
898
    .save_live_pending = ram_save_pending,
899
    .load_state = ram_load,
900
    .cancel = ram_migration_cancel,
901 902
};

903 904 905 906 907 908
struct soundhw {
    const char *name;
    const char *descr;
    int enabled;
    int isa;
    union {
909
        int (*init_isa) (ISABus *bus);
910 911 912 913
        int (*init_pci) (PCIBus *bus);
    } init;
};

914 915
static struct soundhw soundhw[9];
static int soundhw_count;
916

917 918 919 920 921 922 923 924 925 926
void isa_register_soundhw(const char *name, const char *descr,
                          int (*init_isa)(ISABus *bus))
{
    assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
    soundhw[soundhw_count].name = name;
    soundhw[soundhw_count].descr = descr;
    soundhw[soundhw_count].isa = 1;
    soundhw[soundhw_count].init.init_isa = init_isa;
    soundhw_count++;
}
927

928 929 930 931 932 933 934 935 936 937
void pci_register_soundhw(const char *name, const char *descr,
                          int (*init_pci)(PCIBus *bus))
{
    assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
    soundhw[soundhw_count].name = name;
    soundhw[soundhw_count].descr = descr;
    soundhw[soundhw_count].isa = 0;
    soundhw[soundhw_count].init.init_pci = init_pci;
    soundhw_count++;
}
938 939 940 941 942

void select_soundhw(const char *optarg)
{
    struct soundhw *c;

943
    if (is_help_option(optarg)) {
944 945
    show_valid_cards:

946 947 948 949 950 951 952 953 954
        if (soundhw_count) {
             printf("Valid sound card names (comma separated):\n");
             for (c = soundhw; c->name; ++c) {
                 printf ("%-11s %s\n", c->name, c->descr);
             }
             printf("\n-soundhw all will enable all of the above\n");
        } else {
             printf("Machine has no user-selectable audio hardware "
                    "(it may or may not have always-present audio hardware).\n");
955
        }
956
        exit(!is_help_option(optarg));
957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
    }
    else {
        size_t l;
        const char *p;
        char *e;
        int bad_card = 0;

        if (!strcmp(optarg, "all")) {
            for (c = soundhw; c->name; ++c) {
                c->enabled = 1;
            }
            return;
        }

        p = optarg;
        while (*p) {
            e = strchr(p, ',');
            l = !e ? strlen(p) : (size_t) (e - p);

            for (c = soundhw; c->name; ++c) {
                if (!strncmp(c->name, p, l) && !c->name[l]) {
                    c->enabled = 1;
                    break;
                }
            }

            if (!c->name) {
                if (l > 80) {
                    fprintf(stderr,
                            "Unknown sound card name (too big to show)\n");
                }
                else {
                    fprintf(stderr, "Unknown sound card name `%.*s'\n",
                            (int) l, p);
                }
                bad_card = 1;
            }
            p += l + (e != NULL);
        }

        if (bad_card) {
            goto show_valid_cards;
        }
    }
}
1002

1003
void audio_init(void)
1004 1005
{
    struct soundhw *c;
1006 1007
    ISABus *isa_bus = (ISABus *) object_resolve_path_type("", TYPE_ISA_BUS, NULL);
    PCIBus *pci_bus = (PCIBus *) object_resolve_path_type("", TYPE_PCI_BUS, NULL);
1008 1009 1010 1011

    for (c = soundhw; c->name; ++c) {
        if (c->enabled) {
            if (c->isa) {
1012 1013 1014
                if (!isa_bus) {
                    fprintf(stderr, "ISA bus not available for %s\n", c->name);
                    exit(1);
1015
                }
1016
                c->init.init_isa(isa_bus);
1017
            } else {
1018 1019 1020
                if (!pci_bus) {
                    fprintf(stderr, "PCI bus not available for %s\n", c->name);
                    exit(1);
1021
                }
1022
                c->init.init_pci(pci_bus);
1023 1024 1025 1026
            }
        }
    }
}
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044

int qemu_uuid_parse(const char *str, uint8_t *uuid)
{
    int ret;

    if (strlen(str) != 36) {
        return -1;
    }

    ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
                 &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
                 &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
                 &uuid[15]);

    if (ret != 16) {
        return -1;
    }
#ifdef TARGET_I386
1045
    smbios_add_field(1, offsetof(struct smbios_type_1, uuid), uuid, 16);
1046 1047 1048 1049
#endif
    return 0;
}

1050
void do_acpitable_option(const QemuOpts *opts)
1051 1052
{
#ifdef TARGET_I386
1053 1054 1055 1056 1057 1058 1059
    Error *err = NULL;

    acpi_table_add(opts, &err);
    if (err) {
        fprintf(stderr, "Wrong acpi table provided: %s\n",
                error_get_pretty(err));
        error_free(err);
1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
        exit(1);
    }
#endif
}

void do_smbios_option(const char *optarg)
{
#ifdef TARGET_I386
    if (smbios_entry_add(optarg) < 0) {
        exit(1);
    }
#endif
}

void cpudef_init(void)
{
#if defined(cpudef_setup)
    cpudef_setup(); /* parse cpu definitions in target config file */
#endif
}

1081 1082 1083 1084 1085
int tcg_available(void)
{
    return 1;
}

1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102
int kvm_available(void)
{
#ifdef CONFIG_KVM
    return 1;
#else
    return 0;
#endif
}

int xen_available(void)
{
#ifdef CONFIG_XEN
    return 1;
#else
    return 0;
#endif
}