diff options
Diffstat (limited to 'memory.c')
| -rw-r--r-- | memory.c | 70 |
1 files changed, 49 insertions, 21 deletions
@@ -27,8 +27,8 @@ unsigned memory_region_transaction_depth = 0; static bool memory_region_update_pending = false; static bool global_dirty_log = false; -static QLIST_HEAD(, MemoryListener) memory_listeners - = QLIST_HEAD_INITIALIZER(memory_listeners); +static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners + = QTAILQ_HEAD_INITIALIZER(memory_listeners); typedef struct AddrRange AddrRange; @@ -678,17 +678,31 @@ static void address_space_update_ioeventfds(AddressSpace *as) as->ioeventfd_nb = ioeventfd_nb; } -#define MEMORY_LISTENER_CALL(_callback, _args...) \ - do { \ - MemoryListener *_listener; \ - \ - QLIST_FOREACH(_listener, &memory_listeners, link) { \ - _listener->_callback(_listener, ##_args); \ - } \ +enum ListenerDirection { Forward, Reverse }; + +#define MEMORY_LISTENER_CALL(_callback, _direction, _args...) \ + do { \ + MemoryListener *_listener; \ + \ + switch (_direction) { \ + case Forward: \ + QTAILQ_FOREACH(_listener, &memory_listeners, link) { \ + _listener->_callback(_listener, ##_args); \ + } \ + break; \ + case Reverse: \ + QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, \ + memory_listeners, link) { \ + _listener->_callback(_listener, ##_args); \ + } \ + break; \ + default: \ + abort(); \ + } \ } while (0) -#define MEMORY_LISTENER_UPDATE_REGION(fr, as, callback) \ - MEMORY_LISTENER_CALL(callback, &(MemoryRegionSection) { \ +#define MEMORY_LISTENER_UPDATE_REGION(fr, as, dir, callback) \ + MEMORY_LISTENER_CALL(callback, dir, &(MemoryRegionSection) { \ .mr = (fr)->mr, \ .address_space = (as)->root, \ .offset_within_region = (fr)->offset_in_region, \ @@ -728,7 +742,7 @@ static void address_space_update_topology_pass(AddressSpace *as, /* In old, but (not in new, or in new but attributes changed). */ if (!adding) { - MEMORY_LISTENER_UPDATE_REGION(frold, as, region_del); + MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del); as->ops->range_del(as, frold); } @@ -738,11 +752,11 @@ static void address_space_update_topology_pass(AddressSpace *as, if (adding) { if (frold->dirty_log_mask && !frnew->dirty_log_mask) { - MEMORY_LISTENER_UPDATE_REGION(frnew, as, log_stop); + MEMORY_LISTENER_UPDATE_REGION(frnew, as, Reverse, log_stop); as->ops->log_stop(as, frnew); } else if (frnew->dirty_log_mask && !frold->dirty_log_mask) { as->ops->log_start(as, frnew); - MEMORY_LISTENER_UPDATE_REGION(frnew, as, log_start); + MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start); } } @@ -753,7 +767,7 @@ static void address_space_update_topology_pass(AddressSpace *as, if (adding) { as->ops->range_add(as, frnew); - MEMORY_LISTENER_UPDATE_REGION(frnew, as, region_add); + MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add); } ++inew; @@ -1142,7 +1156,8 @@ void memory_region_sync_dirty_bitmap(MemoryRegion *mr) FOR_EACH_FLAT_RANGE(fr, &address_space_memory.current_map) { if (fr->mr == mr) { - MEMORY_LISTENER_UPDATE_REGION(fr, &address_space_memory, log_sync); + MEMORY_LISTENER_UPDATE_REGION(fr, &address_space_memory, + Forward, log_sync); } } } @@ -1469,7 +1484,7 @@ void memory_global_sync_dirty_bitmap(MemoryRegion *address_space) FlatRange *fr; FOR_EACH_FLAT_RANGE(fr, &as->current_map) { - MEMORY_LISTENER_UPDATE_REGION(fr, as, log_sync); + MEMORY_LISTENER_UPDATE_REGION(fr, as, Forward, log_sync); } } @@ -1477,13 +1492,13 @@ void memory_global_dirty_log_start(void) { cpu_physical_memory_set_dirty_tracking(1); global_dirty_log = true; - MEMORY_LISTENER_CALL(log_global_start); + MEMORY_LISTENER_CALL(log_global_start, Forward); } void memory_global_dirty_log_stop(void) { global_dirty_log = false; - MEMORY_LISTENER_CALL(log_global_stop); + MEMORY_LISTENER_CALL(log_global_stop, Reverse); cpu_physical_memory_set_dirty_tracking(0); } @@ -1509,14 +1524,27 @@ static void listener_add_address_space(MemoryListener *listener, void memory_listener_register(MemoryListener *listener) { - QLIST_INSERT_HEAD(&memory_listeners, listener, link); + MemoryListener *other = NULL; + + if (QTAILQ_EMPTY(&memory_listeners) + || listener->priority >= QTAILQ_LAST(&memory_listeners, + memory_listeners)->priority) { + QTAILQ_INSERT_TAIL(&memory_listeners, listener, link); + } else { + QTAILQ_FOREACH(other, &memory_listeners, link) { + if (listener->priority < other->priority) { + break; + } + } + QTAILQ_INSERT_BEFORE(other, listener, link); + } listener_add_address_space(listener, &address_space_memory); listener_add_address_space(listener, &address_space_io); } void memory_listener_unregister(MemoryListener *listener) { - QLIST_REMOVE(listener, link); + QTAILQ_REMOVE(&memory_listeners, listener, link); } void set_system_memory_map(MemoryRegion *mr) |