diff options
Diffstat (limited to 'memory.c')
| -rw-r--r-- | memory.c | 56 |
1 files changed, 53 insertions, 3 deletions
@@ -38,7 +38,7 @@ static unsigned memory_region_transaction_depth; static bool memory_region_update_pending; static bool ioeventfd_update_pending; -static bool global_dirty_log = false; +bool global_dirty_log; static QTAILQ_HEAD(, MemoryListener) memory_listeners = QTAILQ_HEAD_INITIALIZER(memory_listeners); @@ -2067,6 +2067,57 @@ static void memory_region_sync_dirty_bitmap(MemoryRegion *mr) } } +void memory_region_clear_dirty_bitmap(MemoryRegion *mr, hwaddr start, + hwaddr len) +{ + MemoryRegionSection mrs; + MemoryListener *listener; + AddressSpace *as; + FlatView *view; + FlatRange *fr; + hwaddr sec_start, sec_end, sec_size; + + QTAILQ_FOREACH(listener, &memory_listeners, link) { + if (!listener->log_clear) { + continue; + } + as = listener->address_space; + view = address_space_get_flatview(as); + FOR_EACH_FLAT_RANGE(fr, view) { + if (!fr->dirty_log_mask || fr->mr != mr) { + /* + * Clear dirty bitmap operation only applies to those + * regions whose dirty logging is at least enabled + */ + continue; + } + + mrs = section_from_flat_range(fr, view); + + sec_start = MAX(mrs.offset_within_region, start); + sec_end = mrs.offset_within_region + int128_get64(mrs.size); + sec_end = MIN(sec_end, start + len); + + if (sec_start >= sec_end) { + /* + * If this memory region section has no intersection + * with the requested range, skip. + */ + continue; + } + + /* Valid case; shrink the section if needed */ + mrs.offset_within_address_space += + sec_start - mrs.offset_within_region; + mrs.offset_within_region = sec_start; + sec_size = sec_end - sec_start; + mrs.size = int128_make64(sec_size); + listener->log_clear(listener, &mrs); + } + flatview_unref(view); + } +} + DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr, hwaddr addr, hwaddr size, @@ -2074,8 +2125,7 @@ DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr, { assert(mr->ram_block); memory_region_sync_dirty_bitmap(mr); - return cpu_physical_memory_snapshot_and_clear_dirty( - memory_region_get_ram_addr(mr) + addr, size, client); + return cpu_physical_memory_snapshot_and_clear_dirty(mr, addr, size, client); } bool memory_region_snapshot_get_dirty(MemoryRegion *mr, DirtyBitmapSnapshot *snap, |