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author | Juan Quintela <quintela@redhat.com> | 2013-11-05 15:52:54 +0100 |
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committer | Juan Quintela <quintela@redhat.com> | 2014-01-13 14:04:55 +0100 |
commit | 5ff7fb77b3cee8e26648e4fdccb23a77c2a6d3c6 (patch) | |
tree | 25d52129ce3f7a666a3f4ddf5be726845c3f7513 /include/exec | |
parent | c9dd46fc0d64d9f314aa3c220d4aff9d01ab778e (diff) | |
download | hqemu-5ff7fb77b3cee8e26648e4fdccb23a77c2a6d3c6.zip hqemu-5ff7fb77b3cee8e26648e4fdccb23a77c2a6d3c6.tar.gz |
memory: move bitmap synchronization to its own function
We want to have all the functions that handle directly the dirty
bitmap near. We will change it later.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Diffstat (limited to 'include/exec')
-rw-r--r-- | include/exec/ram_addr.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index db977fb..c6736ed 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -79,6 +79,37 @@ static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, xen_modified_memory(start, length); } +static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap, + ram_addr_t start, + ram_addr_t pages) +{ + unsigned int i, j; + unsigned long page_number, c; + hwaddr addr; + ram_addr_t ram_addr; + unsigned int len = (pages + HOST_LONG_BITS - 1) / HOST_LONG_BITS; + unsigned long hpratio = getpagesize() / TARGET_PAGE_SIZE; + + /* + * bitmap-traveling is faster than memory-traveling (for addr...) + * especially when most of the memory is not dirty. + */ + for (i = 0; i < len; i++) { + if (bitmap[i] != 0) { + c = leul_to_cpu(bitmap[i]); + do { + j = ffsl(c) - 1; + c &= ~(1ul << j); + page_number = (i * HOST_LONG_BITS + j) * hpratio; + addr = page_number * TARGET_PAGE_SIZE; + ram_addr = start + addr; + cpu_physical_memory_set_dirty_range(ram_addr, + TARGET_PAGE_SIZE * hpratio); + } while (c != 0); + } + } +} + static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start, ram_addr_t length, unsigned client) |