ram.h (3622B)
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 36extern MigrationStats ram_counters; 37extern XBZRLECacheStats xbzrle_counters; 38extern CompressionStats compression_counters; 39 40bool 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 50int xbzrle_cache_resize(uint64_t new_size, Error **errp); 51uint64_t ram_bytes_remaining(void); 52uint64_t ram_bytes_total(void); 53 54uint64_t ram_pagesize_summary(void); 55int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len); 56void acct_update_position(QEMUFile *f, size_t size, bool zero); 57void ram_debug_dump_bitmap(unsigned long *todump, bool expected, 58 unsigned long pages); 59void ram_postcopy_migrated_memory_release(MigrationState *ms); 60/* For outgoing discard bitmap */ 61int ram_postcopy_send_discard_bitmap(MigrationState *ms); 62/* For incoming postcopy discard */ 63int ram_discard_range(const char *block_name, uint64_t start, size_t length); 64int ram_postcopy_incoming_init(MigrationIncomingState *mis); 65 66void ram_handle_compressed(void *host, uint8_t ch, uint64_t size); 67 68int ramblock_recv_bitmap_test(RAMBlock *rb, void *host_addr); 69bool ramblock_recv_bitmap_test_byte_offset(RAMBlock *rb, uint64_t byte_offset); 70void ramblock_recv_bitmap_set(RAMBlock *rb, void *host_addr); 71void ramblock_recv_bitmap_set_range(RAMBlock *rb, void *host_addr, size_t nr); 72int64_t ramblock_recv_bitmap_send(QEMUFile *file, 73 const char *block_name); 74int ram_dirty_bitmap_reload(MigrationState *s, RAMBlock *rb); 75 76/* ram cache */ 77int colo_init_ram_cache(void); 78void colo_flush_ram_cache(void); 79void colo_release_ram_cache(void); 80void colo_incoming_start_dirty_log(void); 81 82/* Background snapshot */ 83bool ram_write_tracking_available(void); 84bool ram_write_tracking_compatible(void); 85void ram_write_tracking_prepare(void); 86int ram_write_tracking_start(void); 87void ram_write_tracking_stop(void); 88 89#endif