ram.h (3804B)
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 bool ramblock_is_ignored(RAMBlock *block); 41 /* Should be holding either ram_list.mutex, or the RCU lock. */ 42 #define RAMBLOCK_FOREACH_NOT_IGNORED(block) \ 43 INTERNAL_RAMBLOCK_FOREACH(block) \ 44 if (ramblock_is_ignored(block)) {} else 45 46 #define RAMBLOCK_FOREACH_MIGRATABLE(block) \ 47 INTERNAL_RAMBLOCK_FOREACH(block) \ 48 if (!qemu_ram_is_migratable(block)) {} else 49 50 int xbzrle_cache_resize(uint64_t new_size, Error **errp); 51 uint64_t ram_bytes_remaining(void); 52 uint64_t ram_bytes_total(void); 53 void mig_throttle_counter_reset(void); 54 55 uint64_t ram_pagesize_summary(void); 56 int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len); 57 void acct_update_position(QEMUFile *f, size_t size, bool zero); 58 void ram_postcopy_migrated_memory_release(MigrationState *ms); 59 /* For outgoing discard bitmap */ 60 void ram_postcopy_send_discard_bitmap(MigrationState *ms); 61 /* For incoming postcopy discard */ 62 int ram_discard_range(const char *block_name, uint64_t start, size_t length); 63 int ram_postcopy_incoming_init(MigrationIncomingState *mis); 64 int ram_load_postcopy(QEMUFile *f, int channel); 65 66 void ram_handle_compressed(void *host, uint8_t ch, uint64_t size); 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 int64_t ramblock_recv_bitmap_send(QEMUFile *file, 73 const char *block_name); 74 int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb); 75 bool ramblock_page_is_discarded(RAMBlock *rb, ram_addr_t start); 76 void postcopy_preempt_shutdown_file(MigrationState *s); 77 void *postcopy_preempt_thread(void *opaque); 78 79 /* ram cache */ 80 int colo_init_ram_cache(void); 81 void colo_flush_ram_cache(void); 82 void colo_release_ram_cache(void); 83 void colo_incoming_start_dirty_log(void); 84 85 /* Background snapshot */ 86 bool ram_write_tracking_available(void); 87 bool ram_write_tracking_compatible(void); 88 void ram_write_tracking_prepare(void); 89 int ram_write_tracking_start(void); 90 void ram_write_tracking_stop(void); 91 92 void dirty_sync_missed_zero_copy(void); 93 94 #endif