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 78