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authorJuan Quintela <quintela@redhat.com>2013-11-05 15:52:54 +0100
committerJuan Quintela <quintela@redhat.com>2014-01-13 14:04:55 +0100
commit5ff7fb77b3cee8e26648e4fdccb23a77c2a6d3c6 (patch)
tree25d52129ce3f7a666a3f4ddf5be726845c3f7513 /include/exec/ram_addr.h
parentc9dd46fc0d64d9f314aa3c220d4aff9d01ab778e (diff)
downloadqemu-arm-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/ram_addr.h')
-rw-r--r--include/exec/ram_addr.h31
1 files changed, 31 insertions, 0 deletions
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index db977fbdae..c6736ed04f 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)