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 uint64_t ram_pagesize_summary(void);
  45 int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len);
  46 void acct_update_position(QEMUFile *f, size_t size, bool zero);
  47 void ram_debug_dump_bitmap(unsigned long *todump, bool expected,
  48                            unsigned long pages);
  49 void ram_postcopy_migrated_memory_release(MigrationState *ms);
  50 /* For outgoing discard bitmap */
  51 int ram_postcopy_send_discard_bitmap(MigrationState *ms);
  52 /* For incoming postcopy discard */
  53 int ram_discard_range(const char *block_name, uint64_t start, size_t length);
  54 int ram_postcopy_incoming_init(MigrationIncomingState *mis);
  55
  56 void ram_handle_compressed(void *host, uint8_t ch, uint64_t size);
  57
  58 int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr);
  59 bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset);
  60 void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr);
  61 void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr);
  62 int64_t ramblock_recv_bitmap_send(QEMUFile *file,
  63                                   const char *block_name);
  64 int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb);
  65
  66 /* ram cache */
  67 int colo_init_ram_cache(void);
  68 void colo_flush_ram_cache(void);
  69 void colo_release_ram_cache(void);
  70 void colo_incoming_start_dirty_log(void);
  71
  72 #endif