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 XBZRLECacheStats xbzrle_counters; 37 38 /* Should be holding either ram_list.mutex, or the RCU lock. */ 39 #define RAMBLOCK_FOREACH_NOT_IGNORED(block) \ 40 INTERNAL_RAMBLOCK_FOREACH(block) \ 41 if (migrate_ram_is_ignored(block)) {} else 42 43 #define RAMBLOCK_FOREACH_MIGRATABLE(block) \ 44 INTERNAL_RAMBLOCK_FOREACH(block) \ 45 if (!qemu_ram_is_migratable(block)) {} else 46 47 int xbzrle_cache_resize(uint64_t new_size, Error **errp); 48 uint64_t ram_bytes_remaining(void); 49 uint64_t ram_bytes_total(void); 50 void mig_throttle_counter_reset(void); 51 52 uint64_t ram_pagesize_summary(void); 53 int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len, 54 Error **errp); 55 void ram_postcopy_migrated_memory_release(MigrationState *ms); 56 /* For outgoing discard bitmap */ 57 void ram_postcopy_send_discard_bitmap(MigrationState *ms); 58 /* For incoming postcopy discard */ 59 int ram_discard_range(const char *block_name, uint64_t start, size_t length); 60 int ram_postcopy_incoming_init(MigrationIncomingState *mis); 61 int ram_load_postcopy(QEMUFile *f, int channel); 62 63 void ram_handle_zero(void *host, uint64_t size); 64 65 void ram_transferred_add(uint64_t bytes); 66 void ram_release_page(const char *rbname, uint64_t offset); 67 68 int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr); 69 bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset); 70 void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr); 71 void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr); 72 void ramblock_recv_bitmap_set_offset(RAMBlock *rb, uint64_t byte_offset); 73 int64_t ramblock_recv_bitmap_send(QEMUFile *file, 74 const char *block_name); 75 bool ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb, Error **errp); 76 bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start); 77 void postcopy_preempt_shutdown_file(MigrationState *s); 78 void *postcopy_preempt_thread(void *opaque); 79 void ramblock_set_file_bmap_atomic(RAMBlock *block, ram_addr_t offset, 80 bool set); 81 82 /* ram cache */ 83 int colo_init_ram_cache(void); 84 void colo_flush_ram_cache(void); 85 void colo_release_ram_cache(void); 86 void colo_incoming_start_dirty_log(void); 87 void colo_record_bitmap(RAMBlock *block, ram_addr_t *normal, uint32_t pages); 88 89 /* Background snapshot */ 90 bool ram_write_tracking_available(void); 91 bool ram_write_tracking_compatible(void); 92 void ram_write_tracking_prepare(void); 93 int ram_write_tracking_start(void); 94 void ram_write_tracking_stop(void); 95 96 #endif 97