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| author | Gerd Hoffmann <kraxel@redhat.com> | 2017-04-21 11:16:25 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2017-04-24 10:12:28 +0200 |
| commit | 8deaf12ca1a7c89867df739dc9056080509628bd (patch) | |
| tree | f7bae444ae09a9ed1fe4374c7d91b614529bcb13 /include/exec/ram_addr.h | |
| parent | d6eb1413920affb7be3df9982682dd183a805dd7 (diff) | |
| download | qemu-8deaf12ca1a7c89867df739dc9056080509628bd.tar.gz | |
memory: add support getting and using a dirty bitmap copy.
This patch adds support for getting and using a local copy of the dirty
bitmap.
memory_region_snapshot_and_clear_dirty() will create a snapshot of the
dirty bitmap for the specified range, clear the dirty bitmap and return
the copy. The returned bitmap can be a bit larger than requested, the
range is expanded so the code can copy unsigned longs from the bitmap
and avoid atomic bit update operations.
memory_region_snapshot_get_dirty() will return the dirty status of
pages, pretty much like memory_region_get_dirty(), but using the copy
returned by memory_region_copy_and_clear_dirty().
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20170421091632.30900-3-kraxel@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'include/exec/ram_addr.h')
| -rw-r--r-- | include/exec/ram_addr.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index c9ddcd0880..6436a413e7 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -343,6 +343,13 @@ bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, ram_addr_t length, unsigned client); +DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty + (ram_addr_t start, ram_addr_t length, unsigned client); + +bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap, + ram_addr_t start, + ram_addr_t length); + static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start, ram_addr_t length) { |