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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 |
64 | int graphic_width = 1024; | |
65 | int graphic_height = 768; | |
66 | int graphic_depth = 8; | |
67 | #else | |
68 | int graphic_width = 800; | |
69 | int graphic_height = 600; | |
f1ff0e89 | 70 | int 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 | ||
108 | const uint32_t arch_type = QEMU_ARCH; | |
7ca1dfad CV |
109 | static bool mig_throttle_on; |
110 | static int dirty_rate_high_cnt; | |
111 | static 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 | |
b5a8fe5e | 125 | |
756557de EH |
126 | static struct defconfig_file { |
127 | const char *filename; | |
f29a5614 EH |
128 | /* Indicates it is an user config file (disabled by -no-user-config) */ |
129 | bool userconfig; | |
756557de | 130 | } default_config_files[] = { |
f29a5614 | 131 | { CONFIG_QEMU_CONFDIR "/qemu.conf", true }, |
2e59915d | 132 | { CONFIG_QEMU_CONFDIR "/target-" TARGET_NAME ".conf", true }, |
756557de EH |
133 | { NULL }, /* end of list */ |
134 | }; | |
135 | ||
136 | ||
f29a5614 | 137 | int 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 | 155 | static 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 */ | |
162 | static struct { | |
163 | /* buffer used for XBZRLE encoding */ | |
164 | uint8_t *encoded_buf; | |
165 | /* buffer for storing page content */ | |
166 | uint8_t *current_buf; | |
17ad9b35 OW |
167 | /* Cache for XBZRLE */ |
168 | PageCache *cache; | |
169 | } XBZRLE = { | |
170 | .encoded_buf = NULL, | |
171 | .current_buf = NULL, | |
17ad9b35 OW |
172 | .cache = NULL, |
173 | }; | |
905f26f2 GA |
174 | /* buffer used for XBZRLE decoding */ |
175 | static uint8_t *xbzrle_decoded_buf; | |
9e1ba4cc OW |
176 | |
177 | int64_t xbzrle_cache_resize(int64_t new_size) | |
178 | { | |
c91e681a OW |
179 | if (new_size < TARGET_PAGE_SIZE) { |
180 | return -1; | |
181 | } | |
182 | ||
9e1ba4cc OW |
183 | if (XBZRLE.cache != NULL) { |
184 | return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) * | |
185 | TARGET_PAGE_SIZE; | |
186 | } | |
187 | return pow2floor(new_size); | |
188 | } | |
189 | ||
004d4c10 OW |
190 | /* accounting for migration statistics */ |
191 | typedef struct AccountingInfo { | |
192 | uint64_t dup_pages; | |
f1c72795 | 193 | uint64_t skipped_pages; |
004d4c10 OW |
194 | uint64_t norm_pages; |
195 | uint64_t iterations; | |
f36d55af OW |
196 | uint64_t xbzrle_bytes; |
197 | uint64_t xbzrle_pages; | |
198 | uint64_t xbzrle_cache_miss; | |
199 | uint64_t xbzrle_overflows; | |
004d4c10 OW |
200 | } AccountingInfo; |
201 | ||
202 | static AccountingInfo acct_info; | |
203 | ||
204 | static void acct_clear(void) | |
205 | { | |
206 | memset(&acct_info, 0, sizeof(acct_info)); | |
207 | } | |
208 | ||
209 | uint64_t dup_mig_bytes_transferred(void) | |
210 | { | |
211 | return acct_info.dup_pages * TARGET_PAGE_SIZE; | |
212 | } | |
213 | ||
214 | uint64_t dup_mig_pages_transferred(void) | |
215 | { | |
216 | return acct_info.dup_pages; | |
217 | } | |
218 | ||
f1c72795 PL |
219 | uint64_t skipped_mig_bytes_transferred(void) |
220 | { | |
221 | return acct_info.skipped_pages * TARGET_PAGE_SIZE; | |
222 | } | |
223 | ||
224 | uint64_t skipped_mig_pages_transferred(void) | |
225 | { | |
226 | return acct_info.skipped_pages; | |
227 | } | |
228 | ||
004d4c10 OW |
229 | uint64_t norm_mig_bytes_transferred(void) |
230 | { | |
231 | return acct_info.norm_pages * TARGET_PAGE_SIZE; | |
232 | } | |
233 | ||
234 | uint64_t norm_mig_pages_transferred(void) | |
235 | { | |
236 | return acct_info.norm_pages; | |
237 | } | |
238 | ||
f36d55af OW |
239 | uint64_t xbzrle_mig_bytes_transferred(void) |
240 | { | |
241 | return acct_info.xbzrle_bytes; | |
242 | } | |
243 | ||
244 | uint64_t xbzrle_mig_pages_transferred(void) | |
245 | { | |
246 | return acct_info.xbzrle_pages; | |
247 | } | |
248 | ||
249 | uint64_t xbzrle_mig_pages_cache_miss(void) | |
250 | { | |
251 | return acct_info.xbzrle_cache_miss; | |
252 | } | |
253 | ||
254 | uint64_t xbzrle_mig_pages_overflow(void) | |
255 | { | |
256 | return acct_info.xbzrle_overflows; | |
257 | } | |
258 | ||
3f7d7b09 JQ |
259 | static size_t save_block_hdr(QEMUFile *f, RAMBlock *block, ram_addr_t offset, |
260 | int cont, int flag) | |
0c51f43d | 261 | { |
3f7d7b09 JQ |
262 | size_t size; |
263 | ||
264 | qemu_put_be64(f, offset | cont | flag); | |
265 | size = 8; | |
0c51f43d | 266 | |
3f7d7b09 JQ |
267 | if (!cont) { |
268 | qemu_put_byte(f, strlen(block->idstr)); | |
269 | qemu_put_buffer(f, (uint8_t *)block->idstr, | |
270 | strlen(block->idstr)); | |
271 | size += 1 + strlen(block->idstr); | |
272 | } | |
273 | return size; | |
0c51f43d OW |
274 | } |
275 | ||
17ad9b35 OW |
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, | |
dd051c72 | 280 | ram_addr_t offset, int cont, bool last_stage) |
17ad9b35 OW |
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)) { | |
dd051c72 | 286 | if (!last_stage) { |
89db9987 OW |
287 | if (cache_insert(XBZRLE.cache, current_addr, current_data) == -1) { |
288 | return -1; | |
289 | } | |
dd051c72 | 290 | } |
f36d55af | 291 | acct_info.xbzrle_cache_miss++; |
17ad9b35 OW |
292 | return -1; |
293 | } | |
294 | ||
295 | prev_cached_page = get_cached_data(XBZRLE.cache, current_addr); | |
296 | ||
297 | /* save current buffer into memory */ | |
298 | memcpy(XBZRLE.current_buf, current_data, TARGET_PAGE_SIZE); | |
299 | ||
300 | /* XBZRLE encoding (if there is no overflow) */ | |
301 | encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf, | |
302 | TARGET_PAGE_SIZE, XBZRLE.encoded_buf, | |
303 | TARGET_PAGE_SIZE); | |
304 | if (encoded_len == 0) { | |
305 | DPRINTF("Skipping unmodified page\n"); | |
306 | return 0; | |
307 | } else if (encoded_len == -1) { | |
308 | DPRINTF("Overflow\n"); | |
f36d55af | 309 | acct_info.xbzrle_overflows++; |
17ad9b35 OW |
310 | /* update data in the cache */ |
311 | memcpy(prev_cached_page, current_data, TARGET_PAGE_SIZE); | |
312 | return -1; | |
313 | } | |
314 | ||
315 | /* we need to update the data in the cache, in order to get the same data */ | |
dd051c72 JQ |
316 | if (!last_stage) { |
317 | memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE); | |
318 | } | |
17ad9b35 OW |
319 | |
320 | /* Send XBZRLE based compressed page */ | |
3f7d7b09 | 321 | bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE); |
17ad9b35 OW |
322 | qemu_put_byte(f, ENCODING_FLAG_XBZRLE); |
323 | qemu_put_be16(f, encoded_len); | |
324 | qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len); | |
3f7d7b09 | 325 | bytes_sent += encoded_len + 1 + 2; |
f36d55af OW |
326 | acct_info.xbzrle_pages++; |
327 | acct_info.xbzrle_bytes += bytes_sent; | |
17ad9b35 OW |
328 | |
329 | return bytes_sent; | |
330 | } | |
331 | ||
b23a9a5c JQ |
332 | |
333 | /* This is the last block that we have visited serching for dirty pages | |
334 | */ | |
335 | static RAMBlock *last_seen_block; | |
5f718a15 JQ |
336 | /* This is the last block from where we have sent data */ |
337 | static RAMBlock *last_sent_block; | |
760e77ea | 338 | static ram_addr_t last_offset; |
c6bf8e0e JQ |
339 | static unsigned long *migration_bitmap; |
340 | static uint64_t migration_dirty_pages; | |
f798b07f | 341 | static uint32_t last_version; |
78d07ae7 | 342 | static bool ram_bulk_stage; |
760e77ea | 343 | |
4c8ae0f6 JQ |
344 | static inline |
345 | ram_addr_t migration_bitmap_find_and_reset_dirty(MemoryRegion *mr, | |
346 | ram_addr_t start) | |
69268cde | 347 | { |
4c8ae0f6 JQ |
348 | unsigned long base = mr->ram_addr >> TARGET_PAGE_BITS; |
349 | unsigned long nr = base + (start >> TARGET_PAGE_BITS); | |
0851c9f7 MT |
350 | uint64_t mr_size = TARGET_PAGE_ALIGN(memory_region_size(mr)); |
351 | unsigned long size = base + (mr_size >> TARGET_PAGE_BITS); | |
c6bf8e0e | 352 | |
70c8652b PL |
353 | unsigned long next; |
354 | ||
355 | if (ram_bulk_stage && nr > base) { | |
356 | next = nr + 1; | |
357 | } else { | |
358 | next = find_next_bit(migration_bitmap, size, nr); | |
359 | } | |
69268cde | 360 | |
4c8ae0f6 JQ |
361 | if (next < size) { |
362 | clear_bit(next, migration_bitmap); | |
c6bf8e0e | 363 | migration_dirty_pages--; |
69268cde | 364 | } |
4c8ae0f6 | 365 | return (next - base) << TARGET_PAGE_BITS; |
69268cde JQ |
366 | } |
367 | ||
791fa2a2 | 368 | static inline bool migration_bitmap_set_dirty(ram_addr_t addr) |
e44d26c8 | 369 | { |
c6bf8e0e | 370 | bool ret; |
791fa2a2 | 371 | int nr = addr >> TARGET_PAGE_BITS; |
e44d26c8 | 372 | |
c6bf8e0e JQ |
373 | ret = test_and_set_bit(nr, migration_bitmap); |
374 | ||
375 | if (!ret) { | |
376 | migration_dirty_pages++; | |
e44d26c8 | 377 | } |
c6bf8e0e | 378 | return ret; |
e44d26c8 JQ |
379 | } |
380 | ||
791fa2a2 JQ |
381 | static void migration_bitmap_sync_range(ram_addr_t start, ram_addr_t length) |
382 | { | |
383 | ram_addr_t addr; | |
aa8dc044 JQ |
384 | unsigned long page = BIT_WORD(start >> TARGET_PAGE_BITS); |
385 | ||
386 | /* start address is aligned at the start of a word? */ | |
387 | if (((page * BITS_PER_LONG) << TARGET_PAGE_BITS) == start) { | |
388 | int k; | |
389 | int nr = BITS_TO_LONGS(length >> TARGET_PAGE_BITS); | |
390 | unsigned long *src = ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION]; | |
391 | ||
392 | for (k = page; k < page + nr; k++) { | |
393 | if (src[k]) { | |
394 | unsigned long new_dirty; | |
395 | new_dirty = ~migration_bitmap[k]; | |
396 | migration_bitmap[k] |= src[k]; | |
397 | new_dirty &= src[k]; | |
398 | migration_dirty_pages += ctpopl(new_dirty); | |
399 | src[k] = 0; | |
400 | } | |
401 | } | |
402 | } else { | |
403 | for (addr = 0; addr < length; addr += TARGET_PAGE_SIZE) { | |
404 | if (cpu_physical_memory_get_dirty(start + addr, | |
405 | TARGET_PAGE_SIZE, | |
406 | DIRTY_MEMORY_MIGRATION)) { | |
407 | cpu_physical_memory_reset_dirty(start + addr, | |
408 | TARGET_PAGE_SIZE, | |
409 | DIRTY_MEMORY_MIGRATION); | |
410 | migration_bitmap_set_dirty(start + addr); | |
411 | } | |
791fa2a2 JQ |
412 | } |
413 | } | |
414 | } | |
415 | ||
416 | ||
32c835ba PB |
417 | /* Needs iothread lock! */ |
418 | ||
dd2df737 JQ |
419 | static void migration_bitmap_sync(void) |
420 | { | |
c6bf8e0e | 421 | RAMBlock *block; |
c6bf8e0e | 422 | uint64_t num_dirty_pages_init = migration_dirty_pages; |
8d017193 JQ |
423 | MigrationState *s = migrate_get_current(); |
424 | static int64_t start_time; | |
7ca1dfad | 425 | static int64_t bytes_xfer_prev; |
8d017193 JQ |
426 | static int64_t num_dirty_pages_period; |
427 | int64_t end_time; | |
7ca1dfad CV |
428 | int64_t bytes_xfer_now; |
429 | ||
430 | if (!bytes_xfer_prev) { | |
431 | bytes_xfer_prev = ram_bytes_transferred(); | |
432 | } | |
8d017193 JQ |
433 | |
434 | if (!start_time) { | |
bc72ad67 | 435 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
8d017193 | 436 | } |
3c12193d JQ |
437 | |
438 | trace_migration_bitmap_sync_start(); | |
1d671369 | 439 | address_space_sync_dirty_bitmap(&address_space_memory); |
c6bf8e0e | 440 | |
a3161038 | 441 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { |
791fa2a2 | 442 | migration_bitmap_sync_range(block->mr->ram_addr, block->length); |
c6bf8e0e JQ |
443 | } |
444 | trace_migration_bitmap_sync_end(migration_dirty_pages | |
3c12193d | 445 | - num_dirty_pages_init); |
8d017193 | 446 | num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init; |
bc72ad67 | 447 | end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
8d017193 JQ |
448 | |
449 | /* more than 1 second = 1000 millisecons */ | |
450 | if (end_time > start_time + 1000) { | |
7ca1dfad CV |
451 | if (migrate_auto_converge()) { |
452 | /* The following detection logic can be refined later. For now: | |
453 | Check to see if the dirtied bytes is 50% more than the approx. | |
454 | amount of bytes that just got transferred since the last time we | |
455 | were in this routine. If that happens >N times (for now N==4) | |
456 | we turn on the throttle down logic */ | |
457 | bytes_xfer_now = ram_bytes_transferred(); | |
458 | if (s->dirty_pages_rate && | |
459 | (num_dirty_pages_period * TARGET_PAGE_SIZE > | |
460 | (bytes_xfer_now - bytes_xfer_prev)/2) && | |
461 | (dirty_rate_high_cnt++ > 4)) { | |
462 | trace_migration_throttle(); | |
463 | mig_throttle_on = true; | |
464 | dirty_rate_high_cnt = 0; | |
465 | } | |
466 | bytes_xfer_prev = bytes_xfer_now; | |
467 | } else { | |
468 | mig_throttle_on = false; | |
469 | } | |
8d017193 JQ |
470 | s->dirty_pages_rate = num_dirty_pages_period * 1000 |
471 | / (end_time - start_time); | |
90f8ae72 | 472 | s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE; |
8d017193 JQ |
473 | start_time = end_time; |
474 | num_dirty_pages_period = 0; | |
475 | } | |
dd2df737 JQ |
476 | } |
477 | ||
6c779f22 OW |
478 | /* |
479 | * ram_save_block: Writes a page of memory to the stream f | |
480 | * | |
b823ceaa JQ |
481 | * Returns: The number of bytes written. |
482 | * 0 means no dirty pages | |
6c779f22 OW |
483 | */ |
484 | ||
dd051c72 | 485 | static int ram_save_block(QEMUFile *f, bool last_stage) |
ad96090a | 486 | { |
b23a9a5c | 487 | RAMBlock *block = last_seen_block; |
e44359c3 | 488 | ram_addr_t offset = last_offset; |
4c8ae0f6 | 489 | bool complete_round = false; |
b823ceaa | 490 | int bytes_sent = 0; |
71c510e2 | 491 | MemoryRegion *mr; |
17ad9b35 | 492 | ram_addr_t current_addr; |
ad96090a | 493 | |
e44359c3 | 494 | if (!block) |
a3161038 | 495 | block = QTAILQ_FIRST(&ram_list.blocks); |
e44359c3 | 496 | |
4c8ae0f6 | 497 | while (true) { |
71c510e2 | 498 | mr = block->mr; |
4c8ae0f6 JQ |
499 | offset = migration_bitmap_find_and_reset_dirty(mr, offset); |
500 | if (complete_round && block == last_seen_block && | |
501 | offset >= last_offset) { | |
502 | break; | |
503 | } | |
504 | if (offset >= block->length) { | |
505 | offset = 0; | |
506 | block = QTAILQ_NEXT(block, next); | |
507 | if (!block) { | |
508 | block = QTAILQ_FIRST(&ram_list.blocks); | |
509 | complete_round = true; | |
78d07ae7 | 510 | ram_bulk_stage = false; |
4c8ae0f6 JQ |
511 | } |
512 | } else { | |
0033b8b4 | 513 | int ret; |
ad96090a | 514 | uint8_t *p; |
5f718a15 | 515 | int cont = (block == last_sent_block) ? |
b23a9a5c | 516 | RAM_SAVE_FLAG_CONTINUE : 0; |
ad96090a | 517 | |
71c510e2 | 518 | p = memory_region_get_ram_ptr(mr) + offset; |
ad96090a | 519 | |
b823ceaa JQ |
520 | /* In doubt sent page as normal */ |
521 | bytes_sent = -1; | |
0033b8b4 MH |
522 | ret = ram_control_save_page(f, block->offset, |
523 | offset, TARGET_PAGE_SIZE, &bytes_sent); | |
524 | ||
525 | if (ret != RAM_SAVE_CONTROL_NOT_SUPP) { | |
526 | if (ret != RAM_SAVE_CONTROL_DELAYED) { | |
527 | if (bytes_sent > 0) { | |
528 | acct_info.norm_pages++; | |
529 | } else if (bytes_sent == 0) { | |
530 | acct_info.dup_pages++; | |
531 | } | |
532 | } | |
dc3c26a4 | 533 | } else if (is_zero_range(p, TARGET_PAGE_SIZE)) { |
004d4c10 | 534 | acct_info.dup_pages++; |
9ef051e5 PL |
535 | bytes_sent = save_block_hdr(f, block, offset, cont, |
536 | RAM_SAVE_FLAG_COMPRESS); | |
537 | qemu_put_byte(f, 0); | |
538 | bytes_sent++; | |
5cc11c46 | 539 | } else if (!ram_bulk_stage && migrate_use_xbzrle()) { |
17ad9b35 OW |
540 | current_addr = block->offset + offset; |
541 | bytes_sent = save_xbzrle_page(f, p, current_addr, block, | |
dd051c72 JQ |
542 | offset, cont, last_stage); |
543 | if (!last_stage) { | |
544 | p = get_cached_data(XBZRLE.cache, current_addr); | |
545 | } | |
17ad9b35 OW |
546 | } |
547 | ||
b823ceaa | 548 | /* XBZRLE overflow or normal page */ |
17ad9b35 | 549 | if (bytes_sent == -1) { |
3f7d7b09 | 550 | bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_PAGE); |
500f0061 | 551 | qemu_put_buffer_async(f, p, TARGET_PAGE_SIZE); |
3f7d7b09 | 552 | bytes_sent += TARGET_PAGE_SIZE; |
004d4c10 | 553 | acct_info.norm_pages++; |
ad96090a BS |
554 | } |
555 | ||
17ad9b35 | 556 | /* if page is unmodified, continue to the next */ |
b823ceaa | 557 | if (bytes_sent > 0) { |
5f718a15 | 558 | last_sent_block = block; |
17ad9b35 OW |
559 | break; |
560 | } | |
ad96090a | 561 | } |
4c8ae0f6 | 562 | } |
b23a9a5c | 563 | last_seen_block = block; |
e44359c3 | 564 | last_offset = offset; |
ad96090a | 565 | |
3fc250b4 | 566 | return bytes_sent; |
ad96090a BS |
567 | } |
568 | ||
569 | static uint64_t bytes_transferred; | |
570 | ||
2b0ce079 MH |
571 | void acct_update_position(QEMUFile *f, size_t size, bool zero) |
572 | { | |
573 | uint64_t pages = size / TARGET_PAGE_SIZE; | |
574 | if (zero) { | |
575 | acct_info.dup_pages += pages; | |
576 | } else { | |
577 | acct_info.norm_pages += pages; | |
578 | bytes_transferred += size; | |
579 | qemu_update_position(f, size); | |
580 | } | |
581 | } | |
582 | ||
ad96090a BS |
583 | static ram_addr_t ram_save_remaining(void) |
584 | { | |
c6bf8e0e | 585 | return migration_dirty_pages; |
ad96090a BS |
586 | } |
587 | ||
588 | uint64_t ram_bytes_remaining(void) | |
589 | { | |
590 | return ram_save_remaining() * TARGET_PAGE_SIZE; | |
591 | } | |
592 | ||
593 | uint64_t ram_bytes_transferred(void) | |
594 | { | |
595 | return bytes_transferred; | |
596 | } | |
597 | ||
598 | uint64_t ram_bytes_total(void) | |
599 | { | |
d17b5288 AW |
600 | RAMBlock *block; |
601 | uint64_t total = 0; | |
602 | ||
a3161038 | 603 | QTAILQ_FOREACH(block, &ram_list.blocks, next) |
d17b5288 AW |
604 | total += block->length; |
605 | ||
606 | return total; | |
ad96090a BS |
607 | } |
608 | ||
905f26f2 GA |
609 | void free_xbzrle_decoded_buf(void) |
610 | { | |
611 | g_free(xbzrle_decoded_buf); | |
612 | xbzrle_decoded_buf = NULL; | |
613 | } | |
614 | ||
8e21cd32 OW |
615 | static void migration_end(void) |
616 | { | |
244eaa75 PB |
617 | if (migration_bitmap) { |
618 | memory_global_dirty_log_stop(); | |
619 | g_free(migration_bitmap); | |
620 | migration_bitmap = NULL; | |
621 | } | |
17ad9b35 | 622 | |
244eaa75 | 623 | if (XBZRLE.cache) { |
17ad9b35 OW |
624 | cache_fini(XBZRLE.cache); |
625 | g_free(XBZRLE.cache); | |
626 | g_free(XBZRLE.encoded_buf); | |
627 | g_free(XBZRLE.current_buf); | |
17ad9b35 | 628 | XBZRLE.cache = NULL; |
f6c6483b OW |
629 | XBZRLE.encoded_buf = NULL; |
630 | XBZRLE.current_buf = NULL; | |
17ad9b35 | 631 | } |
8e21cd32 OW |
632 | } |
633 | ||
9b5bfab0 JQ |
634 | static void ram_migration_cancel(void *opaque) |
635 | { | |
636 | migration_end(); | |
637 | } | |
638 | ||
5a170775 JQ |
639 | static void reset_ram_globals(void) |
640 | { | |
b23a9a5c | 641 | last_seen_block = NULL; |
5f718a15 | 642 | last_sent_block = NULL; |
5a170775 | 643 | last_offset = 0; |
f798b07f | 644 | last_version = ram_list.version; |
78d07ae7 | 645 | ram_bulk_stage = true; |
5a170775 JQ |
646 | } |
647 | ||
4508bd9e JQ |
648 | #define MAX_WAIT 50 /* ms, half buffered_file limit */ |
649 | ||
d1315aac | 650 | static int ram_save_setup(QEMUFile *f, void *opaque) |
ad96090a | 651 | { |
d1315aac | 652 | RAMBlock *block; |
c6bf8e0e JQ |
653 | int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS; |
654 | ||
655 | migration_bitmap = bitmap_new(ram_pages); | |
7ec81e56 | 656 | bitmap_set(migration_bitmap, 0, ram_pages); |
c6bf8e0e | 657 | migration_dirty_pages = ram_pages; |
7ca1dfad CV |
658 | mig_throttle_on = false; |
659 | dirty_rate_high_cnt = 0; | |
ad96090a | 660 | |
17ad9b35 OW |
661 | if (migrate_use_xbzrle()) { |
662 | XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() / | |
663 | TARGET_PAGE_SIZE, | |
664 | TARGET_PAGE_SIZE); | |
665 | if (!XBZRLE.cache) { | |
666 | DPRINTF("Error creating cache\n"); | |
667 | return -1; | |
668 | } | |
a17b2fd3 OW |
669 | |
670 | /* We prefer not to abort if there is no memory */ | |
671 | XBZRLE.encoded_buf = g_try_malloc0(TARGET_PAGE_SIZE); | |
672 | if (!XBZRLE.encoded_buf) { | |
673 | DPRINTF("Error allocating encoded_buf\n"); | |
674 | return -1; | |
675 | } | |
676 | ||
677 | XBZRLE.current_buf = g_try_malloc(TARGET_PAGE_SIZE); | |
678 | if (!XBZRLE.current_buf) { | |
679 | DPRINTF("Error allocating current_buf\n"); | |
680 | g_free(XBZRLE.encoded_buf); | |
681 | XBZRLE.encoded_buf = NULL; | |
682 | return -1; | |
683 | } | |
684 | ||
004d4c10 | 685 | acct_clear(); |
17ad9b35 OW |
686 | } |
687 | ||
9b095037 PB |
688 | qemu_mutex_lock_iothread(); |
689 | qemu_mutex_lock_ramlist(); | |
690 | bytes_transferred = 0; | |
691 | reset_ram_globals(); | |
692 | ||
d1315aac | 693 | memory_global_dirty_log_start(); |
c6bf8e0e | 694 | migration_bitmap_sync(); |
9b095037 | 695 | qemu_mutex_unlock_iothread(); |
ad96090a | 696 | |
d1315aac | 697 | qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE); |
97ab12d4 | 698 | |
a3161038 | 699 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { |
d1315aac JQ |
700 | qemu_put_byte(f, strlen(block->idstr)); |
701 | qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); | |
702 | qemu_put_be64(f, block->length); | |
ad96090a BS |
703 | } |
704 | ||
b2a8658e | 705 | qemu_mutex_unlock_ramlist(); |
0033b8b4 MH |
706 | |
707 | ram_control_before_iterate(f, RAM_CONTROL_SETUP); | |
708 | ram_control_after_iterate(f, RAM_CONTROL_SETUP); | |
709 | ||
d1315aac JQ |
710 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
16310a3c | 715 | static int ram_save_iterate(QEMUFile *f, void *opaque) |
d1315aac | 716 | { |
d1315aac JQ |
717 | int ret; |
718 | int i; | |
e4ed1541 | 719 | int64_t t0; |
b823ceaa | 720 | int total_sent = 0; |
d1315aac | 721 | |
b2a8658e UD |
722 | qemu_mutex_lock_ramlist(); |
723 | ||
f798b07f UD |
724 | if (ram_list.version != last_version) { |
725 | reset_ram_globals(); | |
726 | } | |
727 | ||
0033b8b4 MH |
728 | ram_control_before_iterate(f, RAM_CONTROL_ROUND); |
729 | ||
bc72ad67 | 730 | t0 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
4508bd9e | 731 | i = 0; |
2975725f | 732 | while ((ret = qemu_file_rate_limit(f)) == 0) { |
3fc250b4 | 733 | int bytes_sent; |
ad96090a | 734 | |
dd051c72 | 735 | bytes_sent = ram_save_block(f, false); |
6c779f22 | 736 | /* no more blocks to sent */ |
b823ceaa | 737 | if (bytes_sent == 0) { |
ad96090a BS |
738 | break; |
739 | } | |
b823ceaa | 740 | total_sent += bytes_sent; |
004d4c10 | 741 | acct_info.iterations++; |
7ca1dfad | 742 | check_guest_throttling(); |
4508bd9e JQ |
743 | /* we want to check in the 1st loop, just in case it was the 1st time |
744 | and we had to sync the dirty bitmap. | |
745 | qemu_get_clock_ns() is a bit expensive, so we only check each some | |
746 | iterations | |
747 | */ | |
748 | if ((i & 63) == 0) { | |
bc72ad67 | 749 | uint64_t t1 = (qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - t0) / 1000000; |
4508bd9e | 750 | if (t1 > MAX_WAIT) { |
ef37a699 | 751 | DPRINTF("big wait: %" PRIu64 " milliseconds, %d iterations\n", |
4508bd9e JQ |
752 | t1, i); |
753 | break; | |
754 | } | |
755 | } | |
756 | i++; | |
ad96090a BS |
757 | } |
758 | ||
fb3409de PB |
759 | qemu_mutex_unlock_ramlist(); |
760 | ||
0033b8b4 MH |
761 | /* |
762 | * Must occur before EOS (or any QEMUFile operation) | |
763 | * because of RDMA protocol. | |
764 | */ | |
765 | ram_control_after_iterate(f, RAM_CONTROL_ROUND); | |
766 | ||
6cd0beda LL |
767 | bytes_transferred += total_sent; |
768 | ||
769 | /* | |
770 | * Do not count these 8 bytes into total_sent, so that we can | |
771 | * return 0 if no page had been dirtied. | |
772 | */ | |
773 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); | |
774 | bytes_transferred += 8; | |
775 | ||
776 | ret = qemu_file_get_error(f); | |
2975725f JQ |
777 | if (ret < 0) { |
778 | return ret; | |
779 | } | |
780 | ||
b823ceaa | 781 | return total_sent; |
16310a3c JQ |
782 | } |
783 | ||
784 | static int ram_save_complete(QEMUFile *f, void *opaque) | |
785 | { | |
b2a8658e | 786 | qemu_mutex_lock_ramlist(); |
9c339485 | 787 | migration_bitmap_sync(); |
b2a8658e | 788 | |
0033b8b4 MH |
789 | ram_control_before_iterate(f, RAM_CONTROL_FINISH); |
790 | ||
ad96090a | 791 | /* try transferring iterative blocks of memory */ |
3a697f69 | 792 | |
16310a3c | 793 | /* flush all remaining blocks regardless of rate limiting */ |
6c779f22 | 794 | while (true) { |
3fc250b4 PR |
795 | int bytes_sent; |
796 | ||
dd051c72 | 797 | bytes_sent = ram_save_block(f, true); |
6c779f22 | 798 | /* no more blocks to sent */ |
b823ceaa | 799 | if (bytes_sent == 0) { |
6c779f22 | 800 | break; |
ad96090a | 801 | } |
16310a3c | 802 | bytes_transferred += bytes_sent; |
ad96090a | 803 | } |
0033b8b4 MH |
804 | |
805 | ram_control_after_iterate(f, RAM_CONTROL_FINISH); | |
244eaa75 | 806 | migration_end(); |
ad96090a | 807 | |
b2a8658e | 808 | qemu_mutex_unlock_ramlist(); |
ad96090a BS |
809 | qemu_put_be64(f, RAM_SAVE_FLAG_EOS); |
810 | ||
5b3c9638 | 811 | return 0; |
ad96090a BS |
812 | } |
813 | ||
e4ed1541 JQ |
814 | static uint64_t ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size) |
815 | { | |
816 | uint64_t remaining_size; | |
817 | ||
818 | remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE; | |
819 | ||
820 | if (remaining_size < max_size) { | |
32c835ba | 821 | qemu_mutex_lock_iothread(); |
e4ed1541 | 822 | migration_bitmap_sync(); |
32c835ba | 823 | qemu_mutex_unlock_iothread(); |
e4ed1541 JQ |
824 | remaining_size = ram_save_remaining() * TARGET_PAGE_SIZE; |
825 | } | |
826 | return remaining_size; | |
827 | } | |
828 | ||
17ad9b35 OW |
829 | static int load_xbzrle(QEMUFile *f, ram_addr_t addr, void *host) |
830 | { | |
831 | int ret, rc = 0; | |
832 | unsigned int xh_len; | |
833 | int xh_flags; | |
834 | ||
905f26f2 GA |
835 | if (!xbzrle_decoded_buf) { |
836 | xbzrle_decoded_buf = g_malloc(TARGET_PAGE_SIZE); | |
17ad9b35 OW |
837 | } |
838 | ||
839 | /* extract RLE header */ | |
840 | xh_flags = qemu_get_byte(f); | |
841 | xh_len = qemu_get_be16(f); | |
842 | ||
843 | if (xh_flags != ENCODING_FLAG_XBZRLE) { | |
844 | fprintf(stderr, "Failed to load XBZRLE page - wrong compression!\n"); | |
845 | return -1; | |
846 | } | |
847 | ||
848 | if (xh_len > TARGET_PAGE_SIZE) { | |
849 | fprintf(stderr, "Failed to load XBZRLE page - len overflow!\n"); | |
850 | return -1; | |
851 | } | |
852 | /* load data and decode */ | |
905f26f2 | 853 | qemu_get_buffer(f, xbzrle_decoded_buf, xh_len); |
17ad9b35 OW |
854 | |
855 | /* decode RLE */ | |
905f26f2 | 856 | ret = xbzrle_decode_buffer(xbzrle_decoded_buf, xh_len, host, |
17ad9b35 OW |
857 | TARGET_PAGE_SIZE); |
858 | if (ret == -1) { | |
859 | fprintf(stderr, "Failed to load XBZRLE page - decode error!\n"); | |
860 | rc = -1; | |
861 | } else if (ret > TARGET_PAGE_SIZE) { | |
862 | fprintf(stderr, "Failed to load XBZRLE page - size %d exceeds %d!\n", | |
863 | ret, TARGET_PAGE_SIZE); | |
864 | abort(); | |
865 | } | |
866 | ||
867 | return rc; | |
868 | } | |
869 | ||
a55bbe31 AW |
870 | static inline void *host_from_stream_offset(QEMUFile *f, |
871 | ram_addr_t offset, | |
872 | int flags) | |
873 | { | |
874 | static RAMBlock *block = NULL; | |
875 | char id[256]; | |
876 | uint8_t len; | |
877 | ||
878 | if (flags & RAM_SAVE_FLAG_CONTINUE) { | |
879 | if (!block) { | |
880 | fprintf(stderr, "Ack, bad migration stream!\n"); | |
881 | return NULL; | |
882 | } | |
883 | ||
dc94a7ed | 884 | return memory_region_get_ram_ptr(block->mr) + offset; |
a55bbe31 AW |
885 | } |
886 | ||
887 | len = qemu_get_byte(f); | |
888 | qemu_get_buffer(f, (uint8_t *)id, len); | |
889 | id[len] = 0; | |
890 | ||
a3161038 | 891 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { |
a55bbe31 | 892 | if (!strncmp(id, block->idstr, sizeof(id))) |
dc94a7ed | 893 | return memory_region_get_ram_ptr(block->mr) + offset; |
a55bbe31 AW |
894 | } |
895 | ||
896 | fprintf(stderr, "Can't find block %s!\n", id); | |
897 | return NULL; | |
898 | } | |
899 | ||
44c3b58c MH |
900 | /* |
901 | * If a page (or a whole RDMA chunk) has been | |
902 | * determined to be zero, then zap it. | |
903 | */ | |
904 | void ram_handle_compressed(void *host, uint8_t ch, uint64_t size) | |
905 | { | |
d613a56f | 906 | if (ch != 0 || !is_zero_range(host, size)) { |
44c3b58c | 907 | memset(host, ch, size); |
44c3b58c MH |
908 | } |
909 | } | |
910 | ||
7908c78d | 911 | static int ram_load(QEMUFile *f, void *opaque, int version_id) |
ad96090a BS |
912 | { |
913 | ram_addr_t addr; | |
3a697f69 | 914 | int flags, ret = 0; |
42802d47 | 915 | int error; |
3a697f69 OW |
916 | static uint64_t seq_iter; |
917 | ||
918 | seq_iter++; | |
ad96090a | 919 | |
f09f2189 | 920 | if (version_id < 4 || version_id > 4) { |
ad96090a BS |
921 | return -EINVAL; |
922 | } | |
923 | ||
924 | do { | |
925 | addr = qemu_get_be64(f); | |
926 | ||
927 | flags = addr & ~TARGET_PAGE_MASK; | |
928 | addr &= TARGET_PAGE_MASK; | |
929 | ||
930 | if (flags & RAM_SAVE_FLAG_MEM_SIZE) { | |
f09f2189 | 931 | if (version_id == 4) { |
97ab12d4 AW |
932 | /* Synchronize RAM block list */ |
933 | char id[256]; | |
934 | ram_addr_t length; | |
935 | ram_addr_t total_ram_bytes = addr; | |
936 | ||
937 | while (total_ram_bytes) { | |
938 | RAMBlock *block; | |
939 | uint8_t len; | |
940 | ||
941 | len = qemu_get_byte(f); | |
942 | qemu_get_buffer(f, (uint8_t *)id, len); | |
943 | id[len] = 0; | |
944 | length = qemu_get_be64(f); | |
945 | ||
a3161038 | 946 | QTAILQ_FOREACH(block, &ram_list.blocks, next) { |
97ab12d4 | 947 | if (!strncmp(id, block->idstr, sizeof(id))) { |
3a697f69 | 948 | if (block->length != length) { |
6bedfe94 SW |
949 | fprintf(stderr, |
950 | "Length mismatch: %s: " RAM_ADDR_FMT | |
951 | " in != " RAM_ADDR_FMT "\n", id, length, | |
87d2f825 | 952 | block->length); |
3a697f69 OW |
953 | ret = -EINVAL; |
954 | goto done; | |
955 | } | |
97ab12d4 AW |
956 | break; |
957 | } | |
958 | } | |
959 | ||
960 | if (!block) { | |
fb787f81 AW |
961 | fprintf(stderr, "Unknown ramblock \"%s\", cannot " |
962 | "accept migration\n", id); | |
3a697f69 OW |
963 | ret = -EINVAL; |
964 | goto done; | |
97ab12d4 AW |
965 | } |
966 | ||
967 | total_ram_bytes -= length; | |
968 | } | |
ad96090a BS |
969 | } |
970 | } | |
971 | ||
972 | if (flags & RAM_SAVE_FLAG_COMPRESS) { | |
97ab12d4 AW |
973 | void *host; |
974 | uint8_t ch; | |
975 | ||
f09f2189 | 976 | host = host_from_stream_offset(f, addr, flags); |
492fb99c MT |
977 | if (!host) { |
978 | return -EINVAL; | |
979 | } | |
97ab12d4 | 980 | |
97ab12d4 | 981 | ch = qemu_get_byte(f); |
44c3b58c | 982 | ram_handle_compressed(host, ch, TARGET_PAGE_SIZE); |
ad96090a | 983 | } else if (flags & RAM_SAVE_FLAG_PAGE) { |
97ab12d4 AW |
984 | void *host; |
985 | ||
f09f2189 | 986 | host = host_from_stream_offset(f, addr, flags); |
0ff1f9f5 OW |
987 | if (!host) { |
988 | return -EINVAL; | |
989 | } | |
97ab12d4 | 990 | |
97ab12d4 | 991 | qemu_get_buffer(f, host, TARGET_PAGE_SIZE); |
17ad9b35 | 992 | } else if (flags & RAM_SAVE_FLAG_XBZRLE) { |
17ad9b35 OW |
993 | void *host = host_from_stream_offset(f, addr, flags); |
994 | if (!host) { | |
995 | return -EINVAL; | |
996 | } | |
997 | ||
998 | if (load_xbzrle(f, addr, host) < 0) { | |
999 | ret = -EINVAL; | |
1000 | goto done; | |
1001 | } | |
0033b8b4 MH |
1002 | } else if (flags & RAM_SAVE_FLAG_HOOK) { |
1003 | ram_control_load_hook(f, flags); | |
ad96090a | 1004 | } |
42802d47 JQ |
1005 | error = qemu_file_get_error(f); |
1006 | if (error) { | |
3a697f69 OW |
1007 | ret = error; |
1008 | goto done; | |
ad96090a BS |
1009 | } |
1010 | } while (!(flags & RAM_SAVE_FLAG_EOS)); | |
1011 | ||
3a697f69 | 1012 | done: |
ef37a699 IM |
1013 | DPRINTF("Completed load of VM with exit code %d seq iteration " |
1014 | "%" PRIu64 "\n", ret, seq_iter); | |
3a697f69 | 1015 | return ret; |
ad96090a BS |
1016 | } |
1017 | ||
7908c78d | 1018 | SaveVMHandlers savevm_ram_handlers = { |
d1315aac | 1019 | .save_live_setup = ram_save_setup, |
16310a3c JQ |
1020 | .save_live_iterate = ram_save_iterate, |
1021 | .save_live_complete = ram_save_complete, | |
e4ed1541 | 1022 | .save_live_pending = ram_save_pending, |
7908c78d | 1023 | .load_state = ram_load, |
9b5bfab0 | 1024 | .cancel = ram_migration_cancel, |
7908c78d JQ |
1025 | }; |
1026 | ||
0dfa5ef9 IY |
1027 | struct soundhw { |
1028 | const char *name; | |
1029 | const char *descr; | |
1030 | int enabled; | |
1031 | int isa; | |
1032 | union { | |
4a0f031d | 1033 | int (*init_isa) (ISABus *bus); |
0dfa5ef9 IY |
1034 | int (*init_pci) (PCIBus *bus); |
1035 | } init; | |
1036 | }; | |
1037 | ||
36cd6f6f PB |
1038 | static struct soundhw soundhw[9]; |
1039 | static int soundhw_count; | |
ad96090a | 1040 | |
36cd6f6f PB |
1041 | void isa_register_soundhw(const char *name, const char *descr, |
1042 | int (*init_isa)(ISABus *bus)) | |
1043 | { | |
1044 | assert(soundhw_count < ARRAY_SIZE(soundhw) - 1); | |
1045 | soundhw[soundhw_count].name = name; | |
1046 | soundhw[soundhw_count].descr = descr; | |
1047 | soundhw[soundhw_count].isa = 1; | |
1048 | soundhw[soundhw_count].init.init_isa = init_isa; | |
1049 | soundhw_count++; | |
1050 | } | |
ad96090a | 1051 | |
36cd6f6f PB |
1052 | void pci_register_soundhw(const char *name, const char *descr, |
1053 | int (*init_pci)(PCIBus *bus)) | |
1054 | { | |
1055 | assert(soundhw_count < ARRAY_SIZE(soundhw) - 1); | |
1056 | soundhw[soundhw_count].name = name; | |
1057 | soundhw[soundhw_count].descr = descr; | |
1058 | soundhw[soundhw_count].isa = 0; | |
1059 | soundhw[soundhw_count].init.init_pci = init_pci; | |
1060 | soundhw_count++; | |
1061 | } | |
ad96090a BS |
1062 | |
1063 | void select_soundhw(const char *optarg) | |
1064 | { | |
1065 | struct soundhw *c; | |
1066 | ||
c8057f95 | 1067 | if (is_help_option(optarg)) { |
ad96090a BS |
1068 | show_valid_cards: |
1069 | ||
36cd6f6f PB |
1070 | if (soundhw_count) { |
1071 | printf("Valid sound card names (comma separated):\n"); | |
1072 | for (c = soundhw; c->name; ++c) { | |
1073 | printf ("%-11s %s\n", c->name, c->descr); | |
1074 | } | |
1075 | printf("\n-soundhw all will enable all of the above\n"); | |
1076 | } else { | |
1077 | printf("Machine has no user-selectable audio hardware " | |
1078 | "(it may or may not have always-present audio hardware).\n"); | |
ad96090a | 1079 | } |
c8057f95 | 1080 | exit(!is_help_option(optarg)); |
ad96090a BS |
1081 | } |
1082 | else { | |
1083 | size_t l; | |
1084 | const char *p; | |
1085 | char *e; | |
1086 | int bad_card = 0; | |
1087 | ||
1088 | if (!strcmp(optarg, "all")) { | |
1089 | for (c = soundhw; c->name; ++c) { | |
1090 | c->enabled = 1; | |
1091 | } | |
1092 | return; | |
1093 | } | |
1094 | ||
1095 | p = optarg; | |
1096 | while (*p) { | |
1097 | e = strchr(p, ','); | |
1098 | l = !e ? strlen(p) : (size_t) (e - p); | |
1099 | ||
1100 | for (c = soundhw; c->name; ++c) { | |
1101 | if (!strncmp(c->name, p, l) && !c->name[l]) { | |
1102 | c->enabled = 1; | |
1103 | break; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | if (!c->name) { | |
1108 | if (l > 80) { | |
1109 | fprintf(stderr, | |
1110 | "Unknown sound card name (too big to show)\n"); | |
1111 | } | |
1112 | else { | |
1113 | fprintf(stderr, "Unknown sound card name `%.*s'\n", | |
1114 | (int) l, p); | |
1115 | } | |
1116 | bad_card = 1; | |
1117 | } | |
1118 | p += l + (e != NULL); | |
1119 | } | |
1120 | ||
1121 | if (bad_card) { | |
1122 | goto show_valid_cards; | |
1123 | } | |
1124 | } | |
1125 | } | |
0dfa5ef9 | 1126 | |
f81222bc | 1127 | void audio_init(void) |
0dfa5ef9 IY |
1128 | { |
1129 | struct soundhw *c; | |
f81222bc PB |
1130 | ISABus *isa_bus = (ISABus *) object_resolve_path_type("", TYPE_ISA_BUS, NULL); |
1131 | PCIBus *pci_bus = (PCIBus *) object_resolve_path_type("", TYPE_PCI_BUS, NULL); | |
0dfa5ef9 IY |
1132 | |
1133 | for (c = soundhw; c->name; ++c) { | |
1134 | if (c->enabled) { | |
1135 | if (c->isa) { | |
f81222bc PB |
1136 | if (!isa_bus) { |
1137 | fprintf(stderr, "ISA bus not available for %s\n", c->name); | |
1138 | exit(1); | |
0dfa5ef9 | 1139 | } |
f81222bc | 1140 | c->init.init_isa(isa_bus); |
0dfa5ef9 | 1141 | } else { |
f81222bc PB |
1142 | if (!pci_bus) { |
1143 | fprintf(stderr, "PCI bus not available for %s\n", c->name); | |
1144 | exit(1); | |
0dfa5ef9 | 1145 | } |
f81222bc | 1146 | c->init.init_pci(pci_bus); |
0dfa5ef9 IY |
1147 | } |
1148 | } | |
1149 | } | |
1150 | } | |
ad96090a BS |
1151 | |
1152 | int qemu_uuid_parse(const char *str, uint8_t *uuid) | |
1153 | { | |
1154 | int ret; | |
1155 | ||
1156 | if (strlen(str) != 36) { | |
1157 | return -1; | |
1158 | } | |
1159 | ||
1160 | ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3], | |
1161 | &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9], | |
1162 | &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14], | |
1163 | &uuid[15]); | |
1164 | ||
1165 | if (ret != 16) { | |
1166 | return -1; | |
1167 | } | |
ad96090a BS |
1168 | return 0; |
1169 | } | |
1170 | ||
0c764a9d | 1171 | void do_acpitable_option(const QemuOpts *opts) |
ad96090a BS |
1172 | { |
1173 | #ifdef TARGET_I386 | |
23084327 LE |
1174 | Error *err = NULL; |
1175 | ||
1176 | acpi_table_add(opts, &err); | |
1177 | if (err) { | |
4a44d85e SA |
1178 | error_report("Wrong acpi table provided: %s", |
1179 | error_get_pretty(err)); | |
23084327 | 1180 | error_free(err); |
ad96090a BS |
1181 | exit(1); |
1182 | } | |
1183 | #endif | |
1184 | } | |
1185 | ||
4f953d2f | 1186 | void do_smbios_option(QemuOpts *opts) |
ad96090a BS |
1187 | { |
1188 | #ifdef TARGET_I386 | |
4f953d2f | 1189 | smbios_entry_add(opts); |
ad96090a BS |
1190 | #endif |
1191 | } | |
1192 | ||
1193 | void cpudef_init(void) | |
1194 | { | |
1195 | #if defined(cpudef_setup) | |
1196 | cpudef_setup(); /* parse cpu definitions in target config file */ | |
1197 | #endif | |
1198 | } | |
1199 | ||
303d4e86 AP |
1200 | int tcg_available(void) |
1201 | { | |
1202 | return 1; | |
1203 | } | |
1204 | ||
ad96090a BS |
1205 | int kvm_available(void) |
1206 | { | |
1207 | #ifdef CONFIG_KVM | |
1208 | return 1; | |
1209 | #else | |
1210 | return 0; | |
1211 | #endif | |
1212 | } | |
1213 | ||
1214 | int xen_available(void) | |
1215 | { | |
1216 | #ifdef CONFIG_XEN | |
1217 | return 1; | |
1218 | #else | |
1219 | return 0; | |
1220 | #endif | |
1221 | } | |
99afc91d DB |
1222 | |
1223 | ||
1224 | TargetInfo *qmp_query_target(Error **errp) | |
1225 | { | |
1226 | TargetInfo *info = g_malloc0(sizeof(*info)); | |
1227 | ||
c02a9552 | 1228 | info->arch = g_strdup(TARGET_NAME); |
99afc91d DB |
1229 | |
1230 | return info; | |
1231 | } | |
7ca1dfad CV |
1232 | |
1233 | /* Stub function that's gets run on the vcpu when its brought out of the | |
1234 | VM to run inside qemu via async_run_on_cpu()*/ | |
1235 | static void mig_sleep_cpu(void *opq) | |
1236 | { | |
1237 | qemu_mutex_unlock_iothread(); | |
1238 | g_usleep(30*1000); | |
1239 | qemu_mutex_lock_iothread(); | |
1240 | } | |
1241 | ||
1242 | /* To reduce the dirty rate explicitly disallow the VCPUs from spending | |
1243 | much time in the VM. The migration thread will try to catchup. | |
1244 | Workload will experience a performance drop. | |
1245 | */ | |
7ca1dfad CV |
1246 | static void mig_throttle_guest_down(void) |
1247 | { | |
38fcbd3f AF |
1248 | CPUState *cpu; |
1249 | ||
7ca1dfad | 1250 | qemu_mutex_lock_iothread(); |
38fcbd3f AF |
1251 | CPU_FOREACH(cpu) { |
1252 | async_run_on_cpu(cpu, mig_sleep_cpu, NULL); | |
1253 | } | |
7ca1dfad CV |
1254 | qemu_mutex_unlock_iothread(); |
1255 | } | |
1256 | ||
1257 | static void check_guest_throttling(void) | |
1258 | { | |
1259 | static int64_t t0; | |
1260 | int64_t t1; | |
1261 | ||
1262 | if (!mig_throttle_on) { | |
1263 | return; | |
1264 | } | |
1265 | ||
1266 | if (!t0) { | |
bc72ad67 | 1267 | t0 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
7ca1dfad CV |
1268 | return; |
1269 | } | |
1270 | ||
bc72ad67 | 1271 | t1 = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); |
7ca1dfad CV |
1272 | |
1273 | /* If it has been more than 40 ms since the last time the guest | |
1274 | * was throttled then do it again. | |
1275 | */ | |
1276 | if (40 < (t1-t0)/1000000) { | |
1277 | mig_throttle_guest_down(); | |
1278 | t0 = t1; | |
1279 | } | |
1280 | } |