[Qemu-devel] [PATCH 05/10] RFC: Add memory region snapshot bitmap get function.

[junyan.he@intel.com]

From: Junyan He <junyan.he@intel.com>

We need to get the bitmap content of the snapshot when enable dirty
log trace for nvdimm.

Signed-off-by: Junyan He <junyan.he@intel.com>
---
 exec.c                  | 7 +++++++
 include/exec/memory.h   | 9 +++++++++
 include/exec/ram_addr.h | 2 ++
 memory.c                | 7 +++++++
 4 files changed, 25 insertions(+)

diff --git a/exec.c b/exec.c
index a9181e6..3d2bf0d 100644
--- a/exec.c
+++ b/exec.c
@@ -1235,6 +1235,13 @@ bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap,
     return false;
 }
 
+unsigned long *cpu_physical_memory_snapshot_get_dirty_bitmap
+     (DirtyBitmapSnapshot *snap)
+{
+    assert(snap);
+    return snap->dirty;
+}
+
 /* Called from RCU critical section */
 hwaddr memory_region_section_get_iotlb(CPUState *cpu,
                                        MemoryRegionSection *section,
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 31eae0a..f742995 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1179,6 +1179,15 @@ bool memory_region_snapshot_get_dirty(MemoryRegion *mr,
                                       hwaddr addr, hwaddr size);
 
 /**
+ * memory_region_snapshot_get_dirty_bitmap: Get the dirty bitmap data of
+ * snapshot.
+ *
+ * @snap: the dirty bitmap snapshot
+ */
+unsigned long *memory_region_snapshot_get_dirty_bitmap
+     (DirtyBitmapSnapshot *snap);
+
+/**
  * memory_region_reset_dirty: Mark a range of pages as clean, for a specified
  *                            client.
  *
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index cf2446a..ce366c1 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -371,6 +371,8 @@ DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty
 bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap,
                                             ram_addr_t start,
                                             ram_addr_t length);
+unsigned long *cpu_physical_memory_snapshot_get_dirty_bitmap
+    (DirtyBitmapSnapshot *snap);
 
 static inline void cpu_physical_memory_clear_dirty_range(ram_addr_t start,
                                                          ram_addr_t length)
diff --git a/memory.c b/memory.c
index 4a8a2fe..68f17f0 100644
--- a/memory.c
+++ b/memory.c
@@ -1991,6 +1991,13 @@ DirtyBitmapSnapshot *memory_region_snapshot_and_clear_dirty(MemoryRegion *mr,
                 memory_region_get_ram_addr(mr) + addr, size, client);
 }
 
+unsigned long *memory_region_snapshot_get_dirty_bitmap
+     (DirtyBitmapSnapshot *snap)
+{
+    assert(snap);
+    return cpu_physical_memory_snapshot_get_dirty_bitmap(snap);
+}
+
 bool memory_region_snapshot_get_dirty(MemoryRegion *mr, DirtyBitmapSnapshot *snap,
                                       hwaddr addr, hwaddr size)
 {
-- 
2.7.4