memory: use bit 2 for migration
For historical reasons it was bit 3. Once there, create a constant to
know the number of clients.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
diff --git a/include/exec/memory.h b/include/exec/memory.h
index b8e76f4..d5e9d58 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -35,7 +35,8 @@
#define DIRTY_MEMORY_VGA 0
#define DIRTY_MEMORY_CODE 1
-#define DIRTY_MEMORY_MIGRATION 3
+#define DIRTY_MEMORY_MIGRATION 2
+#define DIRTY_MEMORY_NUM 3 /* num of dirty bits */
struct MemoryRegionMmio {
CPUReadMemoryFunc *read[3];
