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CommitLineData
ad96090a
BS
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>
b2e0a138 26#include <stdlib.h>
ad96090a 27#ifndef _WIN32
1c47cb16 28#include <sys/types.h>
ad96090a
BS
29#include <sys/mman.h>
30#endif
31#include "config.h"
83c9089e 32#include "monitor/monitor.h"
9c17d615 33#include "sysemu/sysemu.h"
1de7afc9
PB
34#include "qemu/bitops.h"
35#include "qemu/bitmap.h"
9c17d615 36#include "sysemu/arch_init.h"
ad96090a 37#include "audio/audio.h"
0d09e41a 38#include "hw/i386/pc.h"
a2cb15b0 39#include "hw/pci/pci.h"
0d09e41a 40#include "hw/audio/audio.h"
9c17d615 41#include "sysemu/kvm.h"
caf71f86 42#include "migration/migration.h"
0d09e41a 43#include "hw/i386/smbios.h"
022c62cb 44#include "exec/address-spaces.h"
0d09e41a 45#include "hw/audio/pcspk.h"
caf71f86 46#include "migration/page_cache.h"
1de7afc9 47#include "qemu/config-file.h"
99afc91d 48#include "qmp-commands.h"
3c12193d 49#include "trace.h"
0d6d3c87 50#include "exec/cpu-all.h"
12291ec1 51#include "exec/ram_addr.h"
0445259b 52#include "hw/acpi/acpi.h"
aa8dc044 53#include "qemu/host-utils.h"
ad96090a 54
3a697f69
OW
55#ifdef DEBUG_ARCH_INIT
56#define DPRINTF(fmt, ...) \
57 do { fprintf(stdout, "arch_init: " fmt, ## __VA_ARGS__); } while (0)
58#else
59#define DPRINTF(fmt, ...) \
60 do { } while (0)
61#endif
62
ad96090a
BS
63#ifdef TARGET_SPARC
64int graphic_width = 1024;
65int graphic_height = 768;
66int graphic_depth = 8;
67#else
68int graphic_width = 800;
69int graphic_height = 600;
f1ff0e89 70int graphic_depth = 32;
ad96090a
BS
71#endif
72
ad96090a
BS
73
74#if defined(TARGET_ALPHA)
75#define QEMU_ARCH QEMU_ARCH_ALPHA
76#elif defined(TARGET_ARM)
77#define QEMU_ARCH QEMU_ARCH_ARM
78#elif defined(TARGET_CRIS)
79#define QEMU_ARCH QEMU_ARCH_CRIS
80#elif defined(TARGET_I386)
81#define QEMU_ARCH QEMU_ARCH_I386
82#elif defined(TARGET_M68K)
83#define QEMU_ARCH QEMU_ARCH_M68K
81ea0e13
MW
84#elif defined(TARGET_LM32)
85#define QEMU_ARCH QEMU_ARCH_LM32
ad96090a
BS
86#elif defined(TARGET_MICROBLAZE)
87#define QEMU_ARCH QEMU_ARCH_MICROBLAZE
88#elif defined(TARGET_MIPS)
89#define QEMU_ARCH QEMU_ARCH_MIPS
d15a9c23
AG
90#elif defined(TARGET_MOXIE)
91#define QEMU_ARCH QEMU_ARCH_MOXIE
e67db06e
JL
92#elif defined(TARGET_OPENRISC)
93#define QEMU_ARCH QEMU_ARCH_OPENRISC
ad96090a
BS
94#elif defined(TARGET_PPC)
95#define QEMU_ARCH QEMU_ARCH_PPC
96#elif defined(TARGET_S390X)
97#define QEMU_ARCH QEMU_ARCH_S390X
98#elif defined(TARGET_SH4)
99#define QEMU_ARCH QEMU_ARCH_SH4
100#elif defined(TARGET_SPARC)
101#define QEMU_ARCH QEMU_ARCH_SPARC
2328826b
MF
102#elif defined(TARGET_XTENSA)
103#define QEMU_ARCH QEMU_ARCH_XTENSA
4f23a1e6
GX
104#elif defined(TARGET_UNICORE32)
105#define QEMU_ARCH QEMU_ARCH_UNICORE32
ad96090a
BS
106#endif
107
108const uint32_t arch_type = QEMU_ARCH;
7ca1dfad
CV
109static bool mig_throttle_on;
110static int dirty_rate_high_cnt;
111static void check_guest_throttling(void);
ad96090a
BS
112
113/***********************************************************/
114/* ram save/restore */
115
d20878d2
YT
116#define RAM_SAVE_FLAG_FULL 0x01 /* Obsolete, not used anymore */
117#define RAM_SAVE_FLAG_COMPRESS 0x02
118#define RAM_SAVE_FLAG_MEM_SIZE 0x04
119#define RAM_SAVE_FLAG_PAGE 0x08
120#define RAM_SAVE_FLAG_EOS 0x10
121#define RAM_SAVE_FLAG_CONTINUE 0x20
17ad9b35 122#define RAM_SAVE_FLAG_XBZRLE 0x40
0033b8b4 123/* 0x80 is reserved in migration.h start with 0x100 next */
ad96090a 124
756557de
EH
125static struct defconfig_file {
126 const char *filename;
f29a5614
EH
127 /* Indicates it is an user config file (disabled by -no-user-config) */
128 bool userconfig;
756557de 129} default_config_files[] = {
f29a5614 130 { CONFIG_QEMU_CONFDIR "/qemu.conf", true },
2e59915d 131 { CONFIG_QEMU_CONFDIR "/target-" TARGET_NAME ".conf", true },
756557de
EH
132 { NULL }, /* end of list */
133};
134
6d3cb1f9 135static const uint8_t ZERO_TARGET_PAGE[TARGET_PAGE_SIZE];
756557de 136
f29a5614 137int qemu_read_default_config_files(bool userconfig)
b5a8fe5e
EH
138{
139 int ret;
756557de 140 struct defconfig_file *f;
b5a8fe5e 141
756557de 142 for (f = default_config_files; f->filename; f++) {
f29a5614
EH
143 if (!userconfig && f->userconfig) {
144 continue;
145 }
756557de
EH
146 ret = qemu_read_config_file(f->filename);
147 if (ret < 0 && ret != -ENOENT) {
148 return ret;
149 }
b5a8fe5e 150 }
4d8b3c63 151
b5a8fe5e
EH
152 return 0;
153}
154
dc3c26a4 155static inline bool is_zero_range(uint8_t *p, uint64_t size)
ad96090a 156{
dc3c26a4 157 return buffer_find_nonzero_offset(p, size) == size;
ad96090a
BS
158}
159
17ad9b35
OW
160/* struct contains XBZRLE cache and a static page
161 used by the compression */
162static struct {
163 /* buffer used for XBZRLE encoding */
164 uint8_t *encoded_buf;
165 /* buffer for storing page content */
166 uint8_t *current_buf;
fd8cec93 167 /* Cache for XBZRLE, Protected by lock. */
17ad9b35 168 PageCache *cache;
fd8cec93 169 QemuMutex lock;
17ad9b35
OW
170} XBZRLE = {
171 .encoded_buf = NULL,
172 .current_buf = NULL,
17ad9b35
OW
173 .cache = NULL,
174};
905f26f2
GA
175/* buffer used for XBZRLE decoding */
176static uint8_t *xbzrle_decoded_buf;
9e1ba4cc 177
fd8cec93
GA
178static void XBZRLE_cache_lock(void)
179{
180 if (migrate_use_xbzrle())
181 qemu_mutex_lock(&XBZRLE.lock);
182}
183
184static void XBZRLE_cache_unlock(void)
185{
186 if (migrate_use_xbzrle())
187 qemu_mutex_unlock(&XBZRLE.lock);
188}
189
9e1ba4cc
OW
190int64_t xbzrle_cache_resize(int64_t new_size)
191{
fd8cec93
GA
192 PageCache *new_cache, *cache_to_free;
193
c91e681a
OW
194 if (new_size < TARGET_PAGE_SIZE) {
195 return -1;
196 }
197
fd8cec93 198 /* no need to lock, the current thread holds qemu big lock */
9e1ba4cc 199 if (XBZRLE.cache != NULL) {
fd8cec93
GA
200 /* check XBZRLE.cache again later */
201 if (pow2floor(new_size) == migrate_xbzrle_cache_size()) {
202 return pow2floor(new_size);
203 }
204 new_cache = cache_init(new_size / TARGET_PAGE_SIZE,
205 TARGET_PAGE_SIZE);
206 if (!new_cache) {
207 DPRINTF("Error creating cache\n");
208 return -1;
209 }
210
211 XBZRLE_cache_lock();
212 /* the XBZRLE.cache may have be destroyed, check it again */
213 if (XBZRLE.cache != NULL) {
214 cache_to_free = XBZRLE.cache;
215 XBZRLE.cache = new_cache;
216 } else {
217 cache_to_free = new_cache;
218 }
219 XBZRLE_cache_unlock();
220
221 cache_fini(cache_to_free);
9e1ba4cc 222 }
fd8cec93 223
9e1ba4cc
OW
224 return pow2floor(new_size);
225}
226
004d4c10
OW
227/* accounting for migration statistics */
228typedef struct AccountingInfo {
229 uint64_t dup_pages;
f1c72795 230 uint64_t skipped_pages;
004d4c10
OW
231 uint64_t norm_pages;
232 uint64_t iterations;
f36d55af
OW
233 uint64_t xbzrle_bytes;
234 uint64_t xbzrle_pages;
235 uint64_t xbzrle_cache_miss;
236 uint64_t xbzrle_overflows;
004d4c10
OW
237} AccountingInfo;
238
239static AccountingInfo acct_info;
240
241static void acct_clear(void)
242{
243 memset(&acct_info, 0, sizeof(acct_info));
244}
245
246uint64_t dup_mig_bytes_transferred(void)
247{
248 return acct_info.dup_pages * TARGET_PAGE_SIZE;
249}
250
251uint64_t dup_mig_pages_transferred(void)
252{
253 return acct_info.dup_pages;
254}
255
f1c72795
PL
256uint64_t skipped_mig_bytes_transferred(void)
257{
258 return acct_info.skipped_pages * TARGET_PAGE_SIZE;
259}
260
261uint64_t skipped_mig_pages_transferred(void)
262{
263 return acct_info.skipped_pages;
264}
265
004d4c10
OW
266uint64_t norm_mig_bytes_transferred(void)
267{
268 return acct_info.norm_pages * TARGET_PAGE_SIZE;
269}
270
271uint64_t norm_mig_pages_transferred(void)
272{
273 return acct_info.norm_pages;
274}
275
f36d55af
OW
276uint64_t xbzrle_mig_bytes_transferred(void)
277{
278 return acct_info.xbzrle_bytes;
279}
280
281uint64_t xbzrle_mig_pages_transferred(void)
282{
283 return acct_info.xbzrle_pages;
284}
285
286uint64_t xbzrle_mig_pages_cache_miss(void)
287{
288 return acct_info.xbzrle_cache_miss;
289}
290
291uint64_t xbzrle_mig_pages_overflow(void)
292{
293 return acct_info.xbzrle_overflows;
294}
295
3f7d7b09
JQ
296static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset,
297 int cont, int flag)
0c51f43d 298{
3f7d7b09
JQ
299 size_t size;
300
301 qemu_put_be64(f, offset | cont | flag);
302 size = 8;
0c51f43d 303
3f7d7b09
JQ
304 if (!cont) {
305 qemu_put_byte(f, strlen(block->idstr));
306 qemu_put_buffer(f, (uint8_t *)block->idstr,
307 strlen(block->idstr));
308 size += 1 + strlen(block->idstr);
309 }
310 return size;
0c51f43d
OW
311}
312
6d3cb1f9
DDAG
313/* This is the last block that we have visited serching for dirty pages
314 */
315static RAMBlock *last_seen_block;
316/* This is the last block from where we have sent data */
317static RAMBlock *last_sent_block;
318static ram_addr_t last_offset;
319static unsigned long *migration_bitmap;
320static uint64_t migration_dirty_pages;
321static uint32_t last_version;
322static bool ram_bulk_stage;
323
324/* Update the xbzrle cache to reflect a page that's been sent as all 0.
325 * The important thing is that a stale (not-yet-0'd) page be replaced
326 * by the new data.
327 * As a bonus, if the page wasn't in the cache it gets added so that
328 * when a small write is made into the 0'd page it gets XBZRLE sent
329 */
330static void xbzrle_cache_zero_page(ram_addr_t current_addr)
331{
332 if (ram_bulk_stage || !migrate_use_xbzrle()) {
333 return;
334 }
335
336 /* We don't care if this fails to allocate a new cache page
337 * as long as it updated an old one */
338 cache_insert(XBZRLE.cache, current_addr, ZERO_TARGET_PAGE);
339}
340
17ad9b35
OW
341#define ENCODING_FLAG_XBZRLE 0x1
342
343static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
344 ram_addr_t current_addr, RAMBlock *block,
dd051c72 345 ram_addr_t offset, int cont, bool last_stage)
17ad9b35
OW
346{
347 int encoded_len = 0, bytes_sent = -1;
348 uint8_t *prev_cached_page;
349
350 if (!cache_is_cached(XBZRLE.cache, current_addr)) {
dd051c72 351 if (!last_stage) {
89db9987
OW
352 if (cache_insert(XBZRLE.cache, current_addr, current_data) == -1) {
353 return -1;
354 }
dd051c72 355 }
f36d55af 356 acct_info.xbzrle_cache_miss++;
17ad9b35
OW
357 return -1;
358 }
359
360 prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);
361
362 /* save current buffer into memory */
363 memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE);
364
365 /* XBZRLE encoding (if there is no overflow) */
366 encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
367 TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
368 TARGET_PAGE_SIZE);
369 if (encoded_len == 0) {
370 DPRINTF("Skipping unmodified page\n");
371 return 0;
372 } else if (encoded_len == -1) {
373 DPRINTF("Overflow\n");
f36d55af 374 acct_info.xbzrle_overflows++;
17ad9b35
OW
375 /* update data in the cache */
376 memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE);
377 return -1;
378 }
379
380 /* we need to update the data in the cache, in order to get the same data */
dd051c72
JQ
381 if (!last_stage) {
382 memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
383 }
17ad9b35
OW
384
385 /* Send XBZRLE based compressed page */
3f7d7b09 386 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
17ad9b35
OW
387 qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
388 qemu_put_be16(f, encoded_len);
389 qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
3f7d7b09 390 bytes_sent += encoded_len + 1 + 2;
f36d55af
OW
391 acct_info.xbzrle_pages++;
392 acct_info.xbzrle_bytes += bytes_sent;
17ad9b35
OW
393
394 return bytes_sent;
395}
396
4c8ae0f6
JQ
397static inline
398ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr,
399 ram_addr_t start)
69268cde 400{
4c8ae0f6
JQ
401 unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS;
402 unsigned long nr = base + (start >> TARGET_PAGE_BITS);
0851c9f7
MT
403 uint64_t mr_size = TARGET_PAGE_ALIGN(memory_region_size(mr));
404 unsigned long size = base + (mr_size >> TARGET_PAGE_BITS);
c6bf8e0e 405
70c8652b
PL
406 unsigned long next;
407
408 if (ram_bulk_stage && nr > base) {
409 next = nr + 1;
410 } else {
411 next = find_next_bit(migration_bitmap, size, nr);
412 }
69268cde 413
4c8ae0f6
JQ
414 if (next < size) {
415 clear_bit(next, migration_bitmap);
c6bf8e0e 416 migration_dirty_pages--;
69268cde 417 }
4c8ae0f6 418 return (next - base) << TARGET_PAGE_BITS;
69268cde
JQ
419}
420
791fa2a2 421static inline bool migration_bitmap_set_dirty(ram_addr_t addr)
e44d26c8 422{
c6bf8e0e 423 bool ret;
791fa2a2 424 int nr = addr >> TARGET_PAGE_BITS;
e44d26c8 425
c6bf8e0e
JQ
426 ret = test_and_set_bit(nr, migration_bitmap);
427
428 if (!ret) {
429 migration_dirty_pages++;
e44d26c8 430 }
c6bf8e0e 431 return ret;
e44d26c8
JQ
432}
433
791fa2a2
JQ
434static void migration_bitmap_sync_range(ram_addr_t start, ram_addr_t length)
435{
436 ram_addr_t addr;
aa8dc044
JQ
437 unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS);
438
439 /* start address is aligned at the start of a word? */
440 if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) {
441 int k;
442 int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS);
443 unsigned long *src = ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION];
444
445 for (k = page; k < page + nr; k++) {
446 if (src[k]) {
447 unsigned long new_dirty;
448 new_dirty = ~migration_bitmap[k];
449 migration_bitmap[k] |= src[k];
450 new_dirty &= src[k];
451 migration_dirty_pages += ctpopl(new_dirty);
452 src[k] = 0;
453 }
454 }
455 } else {
456 for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) {
457 if (cpu_physical_memory_get_dirty(start + addr,
458 TARGET_PAGE_SIZE,
459 DIRTY_MEMORY_MIGRATION)) {
460 cpu_physical_memory_reset_dirty(start + addr,
461 TARGET_PAGE_SIZE,
462 DIRTY_MEMORY_MIGRATION);
463 migration_bitmap_set_dirty(start + addr);
464 }
791fa2a2
JQ
465 }
466 }
467}
468
469
32c835ba
PB
470/* Needs iothread lock! */
471
dd2df737
JQ
472static void migration_bitmap_sync(void)
473{
c6bf8e0e 474 RAMBlock *block;
c6bf8e0e 475 uint64_t num_dirty_pages_init = migration_dirty_pages;
8d017193
JQ
476 MigrationState *s = migrate_get_current();
477 static int64_t start_time;
7ca1dfad 478 static int64_t bytes_xfer_prev;
8d017193
JQ
479 static int64_t num_dirty_pages_period;
480 int64_t end_time;
7ca1dfad
CV
481 int64_t bytes_xfer_now;
482
483 if (!bytes_xfer_prev) {
484 bytes_xfer_prev = ram_bytes_transferred();
485 }
8d017193
JQ
486
487 if (!start_time) {
bc72ad67 488 start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
8d017193 489 }
3c12193d
JQ
490
491 trace_migration_bitmap_sync_start();
1d671369 492 address_space_sync_dirty_bitmap(&address_space_memory);
c6bf8e0e 493
a3161038 494 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
791fa2a2 495 migration_bitmap_sync_range(block->mr->ram_addr, block->length);
c6bf8e0e
JQ
496 }
497 trace_migration_bitmap_sync_end(migration_dirty_pages
3c12193d 498 - num_dirty_pages_init);
8d017193 499 num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
bc72ad67 500 end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
8d017193
JQ
501
502 /* more than 1 second = 1000 millisecons */
503 if (end_time > start_time + 1000) {
7ca1dfad
CV
504 if (migrate_auto_converge()) {
505 /* The following detection logic can be refined later. For now:
506 Check to see if the dirtied bytes is 50% more than the approx.
507 amount of bytes that just got transferred since the last time we
508 were in this routine. If that happens >N times (for now N==4)
509 we turn on the throttle down logic */
510 bytes_xfer_now = ram_bytes_transferred();
511 if (s->dirty_pages_rate &&
512 (num_dirty_pages_period * TARGET_PAGE_SIZE >
513 (bytes_xfer_now - bytes_xfer_prev)/2) &&
514 (dirty_rate_high_cnt++ > 4)) {
515 trace_migration_throttle();
516 mig_throttle_on = true;
517 dirty_rate_high_cnt = 0;
518 }
519 bytes_xfer_prev = bytes_xfer_now;
520 } else {
521 mig_throttle_on = false;
522 }
8d017193
JQ
523 s->dirty_pages_rate = num_dirty_pages_period * 1000
524 / (end_time - start_time);
90f8ae72 525 s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
8d017193
JQ
526 start_time = end_time;
527 num_dirty_pages_period = 0;
528 }
dd2df737
JQ
529}
530
6c779f22
OW
531/*
532 * ram_save_block: Writes a page of memory to the stream f
533 *
b823ceaa
JQ
534 * Returns: The number of bytes written.
535 * 0 means no dirty pages
6c779f22
OW
536 */
537
dd051c72 538static int ram_save_block(QEMUFile *f, bool last_stage)
ad96090a 539{
b23a9a5c 540 RAMBlock *block = last_seen_block;
e44359c3 541 ram_addr_t offset = last_offset;
4c8ae0f6 542 bool complete_round = false;
b823ceaa 543 int bytes_sent = 0;
71c510e2 544 MemoryRegion *mr;
17ad9b35 545 ram_addr_t current_addr;
ad96090a 546
e44359c3 547 if (!block)
a3161038 548 block = QTAILQ_FIRST(&ram_list.blocks);
e44359c3 549
4c8ae0f6 550 while (true) {
71c510e2 551 mr = block->mr;
4c8ae0f6
JQ
552 offset = migration_bitmap_find_and_reset_dirty(mr, offset);
553 if (complete_round && block == last_seen_block &&
554 offset >= last_offset) {
555 break;
556 }
557 if (offset >= block->length) {
558 offset = 0;
559 block = QTAILQ_NEXT(block, next);
560 if (!block) {
561 block = QTAILQ_FIRST(&ram_list.blocks);
562 complete_round = true;
78d07ae7 563 ram_bulk_stage = false;
4c8ae0f6
JQ
564 }
565 } else {
0033b8b4 566 int ret;
ad96090a 567 uint8_t *p;
6d3cb1f9 568 bool send_async = true;
5f718a15 569 int cont = (block == last_sent_block) ?
b23a9a5c 570 RAM_SAVE_FLAG_CONTINUE : 0;
ad96090a 571
71c510e2 572 p = memory_region_get_ram_ptr(mr) + offset;
ad96090a 573
b823ceaa
JQ
574 /* In doubt sent page as normal */
575 bytes_sent = -1;
0033b8b4
MH
576 ret = ram_control_save_page(f, block->offset,
577 offset, TARGET_PAGE_SIZE, &bytes_sent);
578
fd8cec93
GA
579 XBZRLE_cache_lock();
580
6d3cb1f9 581 current_addr = block->offset + offset;
0033b8b4
MH
582 if (ret != RAM_SAVE_CONTROL_NOT_SUPP) {
583 if (ret != RAM_SAVE_CONTROL_DELAYED) {
584 if (bytes_sent > 0) {
585 acct_info.norm_pages++;
586 } else if (bytes_sent == 0) {
587 acct_info.dup_pages++;
588 }
589 }
dc3c26a4 590 } else if (is_zero_range(p, TARGET_PAGE_SIZE)) {
004d4c10 591 acct_info.dup_pages++;
9ef051e5
PL
592 bytes_sent = save_block_hdr(f, block, offset, cont,
593 RAM_SAVE_FLAG_COMPRESS);
594 qemu_put_byte(f, 0);
595 bytes_sent++;
6d3cb1f9
DDAG
596 /* Must let xbzrle know, otherwise a previous (now 0'd) cached
597 * page would be stale
598 */
599 xbzrle_cache_zero_page(current_addr);
5cc11c46 600 } else if (!ram_bulk_stage && migrate_use_xbzrle()) {
17ad9b35 601 bytes_sent = save_xbzrle_page(f, p, current_addr, block,
dd051c72
JQ
602 offset, cont, last_stage);
603 if (!last_stage) {
6d3cb1f9
DDAG
604 /* We must send exactly what's in the xbzrle cache
605 * even if the page wasn't xbzrle compressed, so that
606 * it's right next time.
607 */
dd051c72 608 p = get_cached_data(XBZRLE.cache, current_addr);
6d3cb1f9
DDAG
609
610 /* Can't send this cached data async, since the cache page
611 * might get updated before it gets to the wire
612 */
613 send_async = false;
dd051c72 614 }
17ad9b35
OW
615 }
616
b823ceaa 617 /* XBZRLE overflow or normal page */
17ad9b35 618 if (bytes_sent == -1) {
3f7d7b09 619 bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE);
6d3cb1f9
DDAG
620 if (send_async) {
621 qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE);
622 } else {
623 qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
624 }
3f7d7b09 625 bytes_sent += TARGET_PAGE_SIZE;
004d4c10 626 acct_info.norm_pages++;
ad96090a
BS
627 }
628
fd8cec93 629 XBZRLE_cache_unlock();
17ad9b35 630 /* if page is unmodified, continue to the next */
b823ceaa 631 if (bytes_sent > 0) {
5f718a15 632 last_sent_block = block;
17ad9b35
OW
633 break;
634 }
ad96090a 635 }
4c8ae0f6 636 }
b23a9a5c 637 last_seen_block = block;
e44359c3 638 last_offset = offset;
ad96090a 639
3fc250b4 640 return bytes_sent;
ad96090a
BS
641}
642
643static uint64_t bytes_transferred;
644
2b0ce079
MH
645void acct_update_position(QEMUFile *f, size_t size, bool zero)
646{
647 uint64_t pages = size / TARGET_PAGE_SIZE;
648 if (zero) {
649 acct_info.dup_pages += pages;
650 } else {
651 acct_info.norm_pages += pages;
652 bytes_transferred += size;
653 qemu_update_position(f, size);
654 }
655}
656
ad96090a
BS
657static ram_addr_t ram_save_remaining(void)
658{
c6bf8e0e 659 return migration_dirty_pages;
ad96090a
BS
660}
661
662uint64_t ram_bytes_remaining(void)
663{
664 return ram_save_remaining() * TARGET_PAGE_SIZE;
665}
666
667uint64_t ram_bytes_transferred(void)
668{
669 return bytes_transferred;
670}
671
672uint64_t ram_bytes_total(void)
673{
d17b5288
AW
674 RAMBlock *block;
675 uint64_t total = 0;
676
a3161038 677 QTAILQ_FOREACH(block, &ram_list.blocks, next)
d17b5288
AW
678 total += block->length;
679
680 return total;
ad96090a
BS
681}
682
905f26f2
GA
683void free_xbzrle_decoded_buf(void)
684{
685 g_free(xbzrle_decoded_buf);
686 xbzrle_decoded_buf = NULL;
687}
688
8e21cd32
OW
689static void migration_end(void)
690{
244eaa75
PB
691 if (migration_bitmap) {
692 memory_global_dirty_log_stop();
693 g_free(migration_bitmap);
694 migration_bitmap = NULL;
695 }
17ad9b35 696
fd8cec93 697 XBZRLE_cache_lock();
244eaa75 698 if (XBZRLE.cache) {
17ad9b35
OW
699 cache_fini(XBZRLE.cache);
700 g_free(XBZRLE.cache);
701 g_free(XBZRLE.encoded_buf);
702 g_free(XBZRLE.current_buf);
17ad9b35 703 XBZRLE.cache = NULL;
f6c6483b
OW
704 XBZRLE.encoded_buf = NULL;
705 XBZRLE.current_buf = NULL;
17ad9b35 706 }
fd8cec93 707 XBZRLE_cache_unlock();
8e21cd32
OW
708}
709
9b5bfab0
JQ
710static void ram_migration_cancel(void *opaque)
711{
712 migration_end();
713}
714
5a170775
JQ
715static void reset_ram_globals(void)
716{
b23a9a5c 717 last_seen_block = NULL;
5f718a15 718 last_sent_block = NULL;
5a170775 719 last_offset = 0;
f798b07f 720 last_version = ram_list.version;
78d07ae7 721 ram_bulk_stage = true;
5a170775
JQ
722}
723
4508bd9e
JQ
724#define MAX_WAIT 50 /* ms, half buffered_file limit */
725
d1315aac 726static int ram_save_setup(QEMUFile *f, void *opaque)
ad96090a 727{
d1315aac 728 RAMBlock *block;
c6bf8e0e
JQ
729 int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
730
731 migration_bitmap = bitmap_new(ram_pages);
7ec81e56 732 bitmap_set(migration_bitmap, 0, ram_pages);
c6bf8e0e 733 migration_dirty_pages = ram_pages;
7ca1dfad
CV
734 mig_throttle_on = false;
735 dirty_rate_high_cnt = 0;
ad96090a 736
17ad9b35 737 if (migrate_use_xbzrle()) {
fd8cec93 738 qemu_mutex_lock_iothread();
17ad9b35
OW
739 XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
740 TARGET_PAGE_SIZE,
741 TARGET_PAGE_SIZE);
742 if (!XBZRLE.cache) {
fd8cec93 743 qemu_mutex_unlock_iothread();
17ad9b35
OW
744 DPRINTF("Error creating cache\n");
745 return -1;
746 }
fd8cec93
GA
747 qemu_mutex_init(&XBZRLE.lock);
748 qemu_mutex_unlock_iothread();
a17b2fd3
OW
749
750 /* We prefer not to abort if there is no memory */
751 XBZRLE.encoded_buf = g_try_malloc0(TARGET_PAGE_SIZE);
752 if (!XBZRLE.encoded_buf) {
753 DPRINTF("Error allocating encoded_buf\n");
754 return -1;
755 }
756
757 XBZRLE.current_buf = g_try_malloc(TARGET_PAGE_SIZE);
758 if (!XBZRLE.current_buf) {
759 DPRINTF("Error allocating current_buf\n");
760 g_free(XBZRLE.encoded_buf);
761 XBZRLE.encoded_buf = NULL;
762 return -1;
763 }
764
004d4c10 765 acct_clear();
17ad9b35
OW
766 }
767
9b095037
PB
768 qemu_mutex_lock_iothread();
769 qemu_mutex_lock_ramlist();
770 bytes_transferred = 0;
771 reset_ram_globals();
772
d1315aac 773 memory_global_dirty_log_start();
c6bf8e0e 774 migration_bitmap_sync();
9b095037 775 qemu_mutex_unlock_iothread();
ad96090a 776
d1315aac 777 qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
97ab12d4 778
a3161038 779 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
d1315aac
JQ
780 qemu_put_byte(f, strlen(block->idstr));
781 qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
782 qemu_put_be64(f, block->length);
ad96090a
BS
783 }
784
b2a8658e 785 qemu_mutex_unlock_ramlist();
0033b8b4
MH
786
787 ram_control_before_iterate(f, RAM_CONTROL_SETUP);
788 ram_control_after_iterate(f, RAM_CONTROL_SETUP);
789
d1315aac
JQ
790 qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
791
792 return 0;
793}
794
16310a3c 795static int ram_save_iterate(QEMUFile *f, void *opaque)
d1315aac 796{
d1315aac
JQ
797 int ret;
798 int i;
e4ed1541 799 int64_t t0;
b823ceaa 800 int total_sent = 0;
d1315aac 801
b2a8658e
UD
802 qemu_mutex_lock_ramlist();
803
f798b07f
UD
804 if (ram_list.version != last_version) {
805 reset_ram_globals();
806 }
807
0033b8b4
MH
808 ram_control_before_iterate(f, RAM_CONTROL_ROUND);
809
bc72ad67 810 t0 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
4508bd9e 811 i = 0;
2975725f 812 while ((ret = qemu_file_rate_limit(f)) == 0) {
3fc250b4 813 int bytes_sent;
ad96090a 814
dd051c72 815 bytes_sent = ram_save_block(f, false);
6c779f22 816 /* no more blocks to sent */
b823ceaa 817 if (bytes_sent == 0) {
ad96090a
BS
818 break;
819 }
b823ceaa 820 total_sent += bytes_sent;
004d4c10 821 acct_info.iterations++;
7ca1dfad 822 check_guest_throttling();
4508bd9e
JQ
823 /* we want to check in the 1st loop, just in case it was the 1st time
824 and we had to sync the dirty bitmap.
825 qemu_get_clock_ns() is a bit expensive, so we only check each some
826 iterations
827 */
828 if ((i & 63) == 0) {
bc72ad67 829 uint64_t t1 = (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - t0) / 1000000;
4508bd9e 830 if (t1 > MAX_WAIT) {
ef37a699 831 DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n",
4508bd9e
JQ
832 t1, i);
833 break;
834 }
835 }
836 i++;
ad96090a
BS
837 }
838
fb3409de
PB
839 qemu_mutex_unlock_ramlist();
840
0033b8b4
MH
841 /*
842 * Must occur before EOS (or any QEMUFile operation)
843 * because of RDMA protocol.
844 */
845 ram_control_after_iterate(f, RAM_CONTROL_ROUND);
846
6cd0beda
LL
847 bytes_transferred += total_sent;
848
849 /*
850 * Do not count these 8 bytes into total_sent, so that we can
851 * return 0 if no page had been dirtied.
852 */
853 qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
854 bytes_transferred += 8;
855
856 ret = qemu_file_get_error(f);
2975725f
JQ
857 if (ret < 0) {
858 return ret;
859 }
860
b823ceaa 861 return total_sent;
16310a3c
JQ
862}
863
864static int ram_save_complete(QEMUFile *f, void *opaque)
865{
b2a8658e 866 qemu_mutex_lock_ramlist();
9c339485 867 migration_bitmap_sync();
b2a8658e 868
0033b8b4
MH
869 ram_control_before_iterate(f, RAM_CONTROL_FINISH);
870
ad96090a 871 /* try transferring iterative blocks of memory */
3a697f69 872
16310a3c 873 /* flush all remaining blocks regardless of rate limiting */
6c779f22 874 while (true) {
3fc250b4
PR
875 int bytes_sent;
876
dd051c72 877 bytes_sent = ram_save_block(f, true);
6c779f22 878 /* no more blocks to sent */
b823ceaa 879 if (bytes_sent == 0) {
6c779f22 880 break;
ad96090a 881 }
16310a3c 882 bytes_transferred += bytes_sent;
ad96090a 883 }
0033b8b4
MH
884
885 ram_control_after_iterate(f, RAM_CONTROL_FINISH);
244eaa75 886 migration_end();
ad96090a 887
b2a8658e 888 qemu_mutex_unlock_ramlist();
ad96090a
BS
889 qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
890
5b3c9638 891 return 0;
ad96090a
BS
892}
893
e4ed1541
JQ
894static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size)
895{
896 uint64_t remaining_size;
897
898 remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
899
900 if (remaining_size < max_size) {
32c835ba 901 qemu_mutex_lock_iothread();
e4ed1541 902 migration_bitmap_sync();
32c835ba 903 qemu_mutex_unlock_iothread();
e4ed1541
JQ
904 remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE;
905 }
906 return remaining_size;
907}
908
17ad9b35
OW
909static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host)
910{
911 int ret, rc = 0;
912 unsigned int xh_len;
913 int xh_flags;
914
905f26f2
GA
915 if (!xbzrle_decoded_buf) {
916 xbzrle_decoded_buf = g_malloc(TARGET_PAGE_SIZE);
17ad9b35
OW
917 }
918
919 /* extract RLE header */
920 xh_flags = qemu_get_byte(f);
921 xh_len = qemu_get_be16(f);
922
923 if (xh_flags != ENCODING_FLAG_XBZRLE) {
924 fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n");
925 return -1;
926 }
927
928 if (xh_len > TARGET_PAGE_SIZE) {
929 fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n");
930 return -1;
931 }
932 /* load data and decode */
905f26f2 933 qemu_get_buffer(f, xbzrle_decoded_buf, xh_len);
17ad9b35
OW
934
935 /* decode RLE */
905f26f2 936 ret = xbzrle_decode_buffer(xbzrle_decoded_buf, xh_len, host,
17ad9b35
OW
937 TARGET_PAGE_SIZE);
938 if (ret == -1) {
939 fprintf(stderr, "Failed to load XBZRLE page - decode error!\n");
940 rc = -1;
941 } else if (ret > TARGET_PAGE_SIZE) {
942 fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n",
943 ret, TARGET_PAGE_SIZE);
944 abort();
945 }
946
947 return rc;
948}
949
a55bbe31
AW
950static inline void *host_from_stream_offset(QEMUFile *f,
951 ram_addr_t offset,
952 int flags)
953{
954 static RAMBlock *block = NULL;
955 char id[256];
956 uint8_t len;
957
958 if (flags & RAM_SAVE_FLAG_CONTINUE) {
959 if (!block) {
960 fprintf(stderr, "Ack, bad migration stream!\n");
961 return NULL;
962 }
963
dc94a7ed 964 return memory_region_get_ram_ptr(block->mr) + offset;
a55bbe31
AW
965 }
966
967 len = qemu_get_byte(f);
968 qemu_get_buffer(f, (uint8_t *)id, len);
969 id[len] = 0;
970
a3161038 971 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
a55bbe31 972 if (!strncmp(id, block->idstr, sizeof(id)))
dc94a7ed 973 return memory_region_get_ram_ptr(block->mr) + offset;
a55bbe31
AW
974 }
975
976 fprintf(stderr, "Can't find block %s!\n", id);
977 return NULL;
978}
979
44c3b58c
MH
980/*
981 * If a page (or a whole RDMA chunk) has been
982 * determined to be zero, then zap it.
983 */
984void ram_handle_compressed(void *host, uint8_t ch, uint64_t size)
985{
d613a56f 986 if (ch != 0 || !is_zero_range(host, size)) {
44c3b58c 987 memset(host, ch, size);
44c3b58c
MH
988 }
989}
990
7908c78d 991static int ram_load(QEMUFile *f, void *opaque, int version_id)
ad96090a
BS
992{
993 ram_addr_t addr;
3a697f69 994 int flags, ret = 0;
42802d47 995 int error;
3a697f69
OW
996 static uint64_t seq_iter;
997
998 seq_iter++;
ad96090a 999
f09f2189 1000 if (version_id < 4 || version_id > 4) {
ad96090a
BS
1001 return -EINVAL;
1002 }
1003
1004 do {
1005 addr = qemu_get_be64(f);
1006
1007 flags = addr & ~TARGET_PAGE_MASK;
1008 addr &= TARGET_PAGE_MASK;
1009
1010 if (flags & RAM_SAVE_FLAG_MEM_SIZE) {
f09f2189 1011 if (version_id == 4) {
97ab12d4
AW
1012 /* Synchronize RAM block list */
1013 char id[256];
1014 ram_addr_t length;
1015 ram_addr_t total_ram_bytes = addr;
1016
1017 while (total_ram_bytes) {
1018 RAMBlock *block;
1019 uint8_t len;
1020
1021 len = qemu_get_byte(f);
1022 qemu_get_buffer(f, (uint8_t *)id, len);
1023 id[len] = 0;
1024 length = qemu_get_be64(f);
1025
a3161038 1026 QTAILQ_FOREACH(block, &ram_list.blocks, next) {
97ab12d4 1027 if (!strncmp(id, block->idstr, sizeof(id))) {
3a697f69 1028 if (block->length != length) {
6bedfe94
SW
1029 fprintf(stderr,
1030 "Length mismatch: %s: " RAM_ADDR_FMT
1031 " in != " RAM_ADDR_FMT "\n", id, length,
87d2f825 1032 block->length);
3a697f69
OW
1033 ret = -EINVAL;
1034 goto done;
1035 }
97ab12d4
AW
1036 break;
1037 }
1038 }
1039
1040 if (!block) {
fb787f81
AW
1041 fprintf(stderr, "Unknown ramblock \"%s\", cannot "
1042 "accept migration\n", id);
3a697f69
OW
1043 ret = -EINVAL;
1044 goto done;
97ab12d4
AW
1045 }
1046
1047 total_ram_bytes -= length;
1048 }
ad96090a
BS
1049 }
1050 }
1051
1052 if (flags & RAM_SAVE_FLAG_COMPRESS) {
97ab12d4
AW
1053 void *host;
1054 uint8_t ch;
1055
f09f2189 1056 host = host_from_stream_offset(f, addr, flags);
492fb99c
MT
1057 if (!host) {
1058 return -EINVAL;
1059 }
97ab12d4 1060
97ab12d4 1061 ch = qemu_get_byte(f);
44c3b58c 1062 ram_handle_compressed(host, ch, TARGET_PAGE_SIZE);
ad96090a 1063 } else if (flags & RAM_SAVE_FLAG_PAGE) {
97ab12d4
AW
1064 void *host;
1065
f09f2189 1066 host = host_from_stream_offset(f, addr, flags);
0ff1f9f5
OW
1067 if (!host) {
1068 return -EINVAL;
1069 }
97ab12d4 1070
97ab12d4 1071 qemu_get_buffer(f, host, TARGET_PAGE_SIZE);
17ad9b35 1072 } else if (flags & RAM_SAVE_FLAG_XBZRLE) {
17ad9b35
OW
1073 void *host = host_from_stream_offset(f, addr, flags);
1074 if (!host) {
1075 return -EINVAL;
1076 }
1077
1078 if (load_xbzrle(f, addr, host) < 0) {
1079 ret = -EINVAL;
1080 goto done;
1081 }
0033b8b4
MH
1082 } else if (flags & RAM_SAVE_FLAG_HOOK) {
1083 ram_control_load_hook(f, flags);
ad96090a 1084 }
42802d47
JQ
1085 error = qemu_file_get_error(f);
1086 if (error) {
3a697f69
OW
1087 ret = error;
1088 goto done;
ad96090a
BS
1089 }
1090 } while (!(flags & RAM_SAVE_FLAG_EOS));
1091
3a697f69 1092done:
ef37a699
IM
1093 DPRINTF("Completed load of VM with exit code %d seq iteration "
1094 "%" PRIu64 "\n", ret, seq_iter);
3a697f69 1095 return ret;
ad96090a
BS
1096}
1097
7908c78d 1098SaveVMHandlers savevm_ram_handlers = {
d1315aac 1099 .save_live_setup = ram_save_setup,
16310a3c
JQ
1100 .save_live_iterate = ram_save_iterate,
1101 .save_live_complete = ram_save_complete,
e4ed1541 1102 .save_live_pending = ram_save_pending,
7908c78d 1103 .load_state = ram_load,
9b5bfab0 1104 .cancel = ram_migration_cancel,
7908c78d
JQ
1105};
1106
0dfa5ef9
IY
1107struct soundhw {
1108 const char *name;
1109 const char *descr;
1110 int enabled;
1111 int isa;
1112 union {
4a0f031d 1113 int (*init_isa) (ISABus *bus);
0dfa5ef9
IY
1114 int (*init_pci) (PCIBus *bus);
1115 } init;
1116};
1117
36cd6f6f
PB
1118static struct soundhw soundhw[9];
1119static int soundhw_count;
ad96090a 1120
36cd6f6f
PB
1121void isa_register_soundhw(const char *name, const char *descr,
1122 int (*init_isa)(ISABus *bus))
1123{
1124 assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
1125 soundhw[soundhw_count].name = name;
1126 soundhw[soundhw_count].descr = descr;
1127 soundhw[soundhw_count].isa = 1;
1128 soundhw[soundhw_count].init.init_isa = init_isa;
1129 soundhw_count++;
1130}
ad96090a 1131
36cd6f6f
PB
1132void pci_register_soundhw(const char *name, const char *descr,
1133 int (*init_pci)(PCIBus *bus))
1134{
1135 assert(soundhw_count < ARRAY_SIZE(soundhw) - 1);
1136 soundhw[soundhw_count].name = name;
1137 soundhw[soundhw_count].descr = descr;
1138 soundhw[soundhw_count].isa = 0;
1139 soundhw[soundhw_count].init.init_pci = init_pci;
1140 soundhw_count++;
1141}
ad96090a
BS
1142
1143void select_soundhw(const char *optarg)
1144{
1145 struct soundhw *c;
1146
c8057f95 1147 if (is_help_option(optarg)) {
ad96090a
BS
1148 show_valid_cards:
1149
36cd6f6f
PB
1150 if (soundhw_count) {
1151 printf("Valid sound card names (comma separated):\n");
1152 for (c = soundhw; c->name; ++c) {
1153 printf ("%-11s %s\n", c->name, c->descr);
1154 }
1155 printf("\n-soundhw all will enable all of the above\n");
1156 } else {
1157 printf("Machine has no user-selectable audio hardware "
1158 "(it may or may not have always-present audio hardware).\n");
ad96090a 1159 }
c8057f95 1160 exit(!is_help_option(optarg));
ad96090a
BS
1161 }
1162 else {
1163 size_t l;
1164 const char *p;
1165 char *e;
1166 int bad_card = 0;
1167
1168 if (!strcmp(optarg, "all")) {
1169 for (c = soundhw; c->name; ++c) {
1170 c->enabled = 1;
1171 }
1172 return;
1173 }
1174
1175 p = optarg;
1176 while (*p) {
1177 e = strchr(p, ',');
1178 l = !e ? strlen(p) : (size_t) (e - p);
1179
1180 for (c = soundhw; c->name; ++c) {
1181 if (!strncmp(c->name, p, l) && !c->name[l]) {
1182 c->enabled = 1;
1183 break;
1184 }
1185 }
1186
1187 if (!c->name) {
1188 if (l > 80) {
1189 fprintf(stderr,
1190 "Unknown sound card name (too big to show)\n");
1191 }
1192 else {
1193 fprintf(stderr, "Unknown sound card name `%.*s'\n",
1194 (int) l, p);
1195 }
1196 bad_card = 1;
1197 }
1198 p += l + (e != NULL);
1199 }
1200
1201 if (bad_card) {
1202 goto show_valid_cards;
1203 }
1204 }
1205}
0dfa5ef9 1206
f81222bc 1207void audio_init(void)
0dfa5ef9
IY
1208{
1209 struct soundhw *c;
f81222bc
PB
1210 ISABus *isa_bus = (ISABus *) object_resolve_path_type("", TYPE_ISA_BUS, NULL);
1211 PCIBus *pci_bus = (PCIBus *) object_resolve_path_type("", TYPE_PCI_BUS, NULL);
0dfa5ef9
IY
1212
1213 for (c = soundhw; c->name; ++c) {
1214 if (c->enabled) {
1215 if (c->isa) {
f81222bc
PB
1216 if (!isa_bus) {
1217 fprintf(stderr, "ISA bus not available for %s\n", c->name);
1218 exit(1);
0dfa5ef9 1219 }
f81222bc 1220 c->init.init_isa(isa_bus);
0dfa5ef9 1221 } else {
f81222bc
PB
1222 if (!pci_bus) {
1223 fprintf(stderr, "PCI bus not available for %s\n", c->name);
1224 exit(1);
0dfa5ef9 1225 }
f81222bc 1226 c->init.init_pci(pci_bus);
0dfa5ef9
IY
1227 }
1228 }
1229 }
1230}
ad96090a
BS
1231
1232int qemu_uuid_parse(const char *str, uint8_t *uuid)
1233{
1234 int ret;
1235
1236 if (strlen(str) != 36) {
1237 return -1;
1238 }
1239
1240 ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
1241 &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
1242 &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
1243 &uuid[15]);
1244
1245 if (ret != 16) {
1246 return -1;
1247 }
ad96090a
BS
1248 return 0;
1249}
1250
0c764a9d 1251void do_acpitable_option(const QemuOpts *opts)
ad96090a
BS
1252{
1253#ifdef TARGET_I386
23084327
LE
1254 Error *err = NULL;
1255
1256 acpi_table_add(opts, &err);
1257 if (err) {
4a44d85e
SA
1258 error_report("Wrong acpi table provided: %s",
1259 error_get_pretty(err));
23084327 1260 error_free(err);
ad96090a
BS
1261 exit(1);
1262 }
1263#endif
1264}
1265
4f953d2f 1266void do_smbios_option(QemuOpts *opts)
ad96090a
BS
1267{
1268#ifdef TARGET_I386
4f953d2f 1269 smbios_entry_add(opts);
ad96090a
BS
1270#endif
1271}
1272
1273void cpudef_init(void)
1274{
1275#if defined(cpudef_setup)
1276 cpudef_setup(); /* parse cpu definitions in target config file */
1277#endif
1278}
1279
303d4e86
AP
1280int tcg_available(void)
1281{
1282 return 1;
1283}
1284
ad96090a
BS
1285int kvm_available(void)
1286{
1287#ifdef CONFIG_KVM
1288 return 1;
1289#else
1290 return 0;
1291#endif
1292}
1293
1294int xen_available(void)
1295{
1296#ifdef CONFIG_XEN
1297 return 1;
1298#else
1299 return 0;
1300#endif
1301}
99afc91d
DB
1302
1303
1304TargetInfo *qmp_query_target(Error **errp)
1305{
1306 TargetInfo *info = g_malloc0(sizeof(*info));
1307
c02a9552 1308 info->arch = g_strdup(TARGET_NAME);
99afc91d
DB
1309
1310 return info;
1311}
7ca1dfad
CV
1312
1313/* Stub function that's gets run on the vcpu when its brought out of the
1314 VM to run inside qemu via async_run_on_cpu()*/
1315static void mig_sleep_cpu(void *opq)
1316{
1317 qemu_mutex_unlock_iothread();
1318 g_usleep(30*1000);
1319 qemu_mutex_lock_iothread();
1320}
1321
1322/* To reduce the dirty rate explicitly disallow the VCPUs from spending
1323 much time in the VM. The migration thread will try to catchup.
1324 Workload will experience a performance drop.
1325*/
7ca1dfad
CV
1326static void mig_throttle_guest_down(void)
1327{
38fcbd3f
AF
1328 CPUState *cpu;
1329
7ca1dfad 1330 qemu_mutex_lock_iothread();
38fcbd3f
AF
1331 CPU_FOREACH(cpu) {
1332 async_run_on_cpu(cpu, mig_sleep_cpu, NULL);
1333 }
7ca1dfad
CV
1334 qemu_mutex_unlock_iothread();
1335}
1336
1337static void check_guest_throttling(void)
1338{
1339 static int64_t t0;
1340 int64_t t1;
1341
1342 if (!mig_throttle_on) {
1343 return;
1344 }
1345
1346 if (!t0) {
bc72ad67 1347 t0 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
7ca1dfad
CV
1348 return;
1349 }
1350
bc72ad67 1351 t1 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
7ca1dfad
CV
1352
1353 /* If it has been more than 40 ms since the last time the guest
1354 * was throttled then do it again.
1355 */
1356 if (40 < (t1-t0)/1000000) {
1357 mig_throttle_guest_down();
1358 t0 = t1;
1359 }
1360}