diff options
Diffstat (limited to 'include/migration')
| -rw-r--r-- | include/migration/migration.h | 5 | ||||
| -rw-r--r-- | include/migration/postcopy-ram.h | 35 |
2 files changed, 40 insertions, 0 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h index 219032def2..b382d7774f 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -199,6 +199,11 @@ double xbzrle_mig_cache_miss_rate(void); void ram_handle_compressed(void *host, uint8_t ch, uint64_t size); void ram_debug_dump_bitmap(unsigned long *todump, bool expected); +/* For outgoing discard bitmap */ +int ram_postcopy_send_discard_bitmap(MigrationState *ms); +/* For incoming postcopy discard */ +int ram_discard_range(MigrationIncomingState *mis, const char *block_name, + uint64_t start, size_t length); /** * @migrate_add_blocker - prevent migration from proceeding diff --git a/include/migration/postcopy-ram.h b/include/migration/postcopy-ram.h index d81934ff8d..de79fa778f 100644 --- a/include/migration/postcopy-ram.h +++ b/include/migration/postcopy-ram.h @@ -16,4 +16,39 @@ /* Return true if the host supports everything we need to do postcopy-ram */ bool postcopy_ram_supported_by_host(void); +/* + * Discard the contents of 'length' bytes from 'start' + * We can assume that if we've been called postcopy_ram_hosttest returned true + */ +int postcopy_ram_discard_range(MigrationIncomingState *mis, uint8_t *start, + size_t length); + + +/* + * Called at the start of each RAMBlock by the bitmap code. + * 'offset' is the bitmap offset of the named RAMBlock in the migration + * bitmap. + * Returns a new PDS + */ +PostcopyDiscardState *postcopy_discard_send_init(MigrationState *ms, + unsigned long offset, + const char *name); + +/* + * Called by the bitmap code for each chunk to discard. + * May send a discard message, may just leave it queued to + * be sent later. + * @start,@length: a range of pages in the migration bitmap in the + * RAM block passed to postcopy_discard_send_init() (length=1 is one page) + */ +void postcopy_discard_send_range(MigrationState *ms, PostcopyDiscardState *pds, + unsigned long start, unsigned long length); + +/* + * Called at the end of each RAMBlock by the bitmap code. + * Sends any outstanding discard messages, frees the PDS. + */ +void postcopy_discard_send_finish(MigrationState *ms, + PostcopyDiscardState *pds); + #endif |