[PATCH v4 11/15] vfio/common: Move dirty tracking ranges update to helper

[Joao Martins]

Separate the changes that updates the ranges from the listener, to
make it reusable in preparation to expand its use to vIOMMU support.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
---
 hw/vfio/common.c | 36 +++++++++++++++++++++---------------
 1 file changed, 21 insertions(+), 15 deletions(-)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index 17c1d882e221..ecfb9afb3fb6 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1413,20 +1413,10 @@ typedef struct VFIODirtyRangesListener {
     MemoryListener listener;
 } VFIODirtyRangesListener;
 
-static void vfio_dirty_tracking_update(MemoryListener *listener,
-                                       MemoryRegionSection *section)
+static void vfio_dirty_tracking_update(hwaddr iova, hwaddr end,
+                                       VFIODirtyRanges *range)
 {
-    VFIODirtyRangesListener *dirty = container_of(listener,
-                                                  VFIODirtyRangesListener,
-                                                  listener);
-    VFIODirtyRanges *range = &dirty->ranges;
-    hwaddr iova, end, *min, *max;
-
-    if (!vfio_listener_valid_section(section, "tracking_update") ||
-        !vfio_get_section_iova_range(dirty->container, section,
-                                     &iova, &end, NULL)) {
-        return;
-    }
+    hwaddr *min, *max;
 
     /*
      * The address space passed to the dirty tracker is reduced to two ranges:
@@ -1450,12 +1440,28 @@ static void vfio_dirty_tracking_update(MemoryListener 
*listener,
     }
 
     trace_vfio_device_dirty_tracking_update(iova, end, *min, *max);
-    return;
+}
+
+static void vfio_listener_dirty_tracking_update(MemoryListener *listener,
+                                                MemoryRegionSection *section)
+{
+    VFIODirtyRangesListener *dirty = container_of(listener,
+                                                  VFIODirtyRangesListener,
+                                                  listener);
+    hwaddr iova, end;
+
+    if (!vfio_listener_valid_section(section, "tracking_update") ||
+        !vfio_get_section_iova_range(dirty->container, section,
+                                     &iova, &end, NULL)) {
+        return;
+    }
+
+    vfio_dirty_tracking_update(iova, end, &dirty->ranges);
 }
 
 static const MemoryListener vfio_dirty_tracking_listener = {
     .name = "vfio-tracking",
-    .region_add = vfio_dirty_tracking_update,
+    .region_add = vfio_listener_dirty_tracking_update,
 };
 
 static void vfio_dirty_tracking_init(VFIOContainer *container,
-- 
2.17.2