[PATCH v3 2/3] memory: introduce DirtyRateDirtyPages and util function

[huangy81@chinatelecom.cn]

From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>

introduce DirtyRateDirtyPages and use it to the dirty pages
along with memory_global_dirty_log_sync.
introduce cpu_physical_memory_dirtyrate_reset_protect to
clear dirty bitmap within slot in kvm

Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
---
 include/exec/ram_addr.h | 19 +++++++++++++++++++
 migration/dirtyrate.c   |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index 45c9132..dce0f46 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -26,6 +26,8 @@
 #include "exec/ramlist.h"
 #include "exec/ramblock.h"
 
+extern uint64_t DirtyRateDirtyPages;
+
 /**
  * clear_bmap_size: calculate clear bitmap size
  *
@@ -415,6 +417,17 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
             }
         }
     }
+
+    if (global_dirty_tracking &&
+        global_dirty_tracking & GLOBAL_DIRTY_DIRTY_RATE) {
+        long nr = BITS_TO_LONGS(pages);
+        for (i = 0; i < nr; i++) {
+            if (bitmap[i]) {
+                unsigned long temp = leul_to_cpu(bitmap[i]);
+                DirtyRateDirtyPages += ctpopl(temp);
+            }
+        }
+    }
 }
 #endif /* not _WIN32 */
 
@@ -510,5 +523,11 @@ uint64_t cpu_physical_memory_sync_dirty_bitmap(RAMBlock *rb,
 
     return num_dirty;
 }
+
+static inline
+void cpu_physical_memory_dirtyrate_reset_protect(RAMBlock *rb)
+{
+    memory_region_clear_dirty_bitmap(rb->mr, 0, rb->used_length);
+}
 #endif
 #endif
diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index 3c8c5e2..c465e62 100644
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -28,6 +28,8 @@
 #include "sysemu/runstate.h"
 #include "exec/memory.h"
 
+uint64_t DirtyRateDirtyPages;
+
 typedef struct DirtyPageRecord {
     uint64_t start_pages;
     uint64_t end_pages;
-- 
1.8.3.1