Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
[qemu.git] / migration / ram.h
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2011-2015 Red Hat Inc
6 *
7 * Authors:
8 * Juan Quintela <quintela@redhat.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 * THE SOFTWARE.
27 */
28
29 #ifndef QEMU_MIGRATION_RAM_H
30 #define QEMU_MIGRATION_RAM_H
31
32 #include "qapi/qapi-types-migration.h"
33 #include "exec/cpu-common.h"
34 #include "io/channel.h"
35
36 extern MigrationStats ram_counters;
37 extern XBZRLECacheStats xbzrle_counters;
38 extern CompressionStats compression_counters;
39
40 int xbzrle_cache_resize(int64_t new_size, Error **errp);
41 uint64_t ram_bytes_remaining(void);
42 uint64_t ram_bytes_total(void);
43
44 int multifd_save_setup(void);
45 void multifd_save_cleanup(void);
46 int multifd_load_setup(void);
47 int multifd_load_cleanup(Error **errp);
48 bool multifd_recv_all_channels_created(void);
49 bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp);
50
51 uint64_t ram_pagesize_summary(void);
52 int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
53 void acct_update_position(QEMUFile *f, size_t size, bool zero);
54 void ram_debug_dump_bitmap(unsigned long *todump, bool expected,
55 unsigned long pages);
56 void ram_postcopy_migrated_memory_release(MigrationState *ms);
57 /* For outgoing discard bitmap */
58 int ram_postcopy_send_discard_bitmap(MigrationState *ms);
59 /* For incoming postcopy discard */
60 int ram_discard_range(const char *block_name, uint64_t start, size_t length);
61 int ram_postcopy_incoming_init(MigrationIncomingState *mis);
62
63 void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
64
65 int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr);
66 bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset);
67 void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr);
68 void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr);
69 int64_t ramblock_recv_bitmap_send(QEMUFile *file,
70 const char *block_name);
71 int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb);
72
73 /* ram cache */
74 int colo_init_ram_cache(void);
75 void colo_release_ram_cache(void);
76
77 #endif