Finally add notify_flag_changed() to for memory-region
access flag iommu flag change notifier

Finally add the memory notifier

Signed-off-by: Bharat Bhushan <bbhushan2@marvell.com>
---
 hw/virtio/virtio-iommu.c | 22 ++++++++++++++++++++++
 hw/virtio/trace-events   |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 63fbacdcdc..413792b626 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -966,6 +966,27 @@ unlock:
     qemu_mutex_unlock(&s->mutex);
 }
 
+static int virtio_iommu_notify_flag_changed(IOMMUMemoryRegion *iommu_mr,
+                                             IOMMUNotifierFlag old,
+                                             IOMMUNotifierFlag new,
+                                             Error **errp)
+{
+    IOMMUDevice *sdev = container_of(iommu_mr, IOMMUDevice, iommu_mr);
+    VirtIOIOMMU *s = sdev->viommu;
+
+    if (old == IOMMU_NOTIFIER_NONE) {
+        trace_virtio_iommu_notify_flag_add(iommu_mr->parent_obj.name);
+        QLIST_INSERT_HEAD(&s->notifiers_list, sdev, next);
+        return 0;
+    }
+
+    if (new == IOMMU_NOTIFIER_NONE) {
+        trace_virtio_iommu_notify_flag_del(iommu_mr->parent_obj.name);
+        QLIST_REMOVE(sdev, next);
+    }
+    return 0;
+}
+
 static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
@@ -1187,6 +1208,7 @@ static void virtio_iommu_memory_region_class_init(ObjectClass *klass,
     imrc->translate = virtio_iommu_translate;
     imrc->iommu_set_page_size_mask = virtio_iommu_set_page_size_mask;
     imrc->replay = virtio_iommu_replay;
+    imrc->notify_flag_changed = virtio_iommu_notify_flag_changed;
 }
 
 static const TypeInfo virtio_iommu_info = {
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index b0a6e4bda3..6b7495ac3d 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -78,3 +78,5 @@ virtio_iommu_notify_unmap(const char *name, uint64_t iova, uint64_t map_size) "m
 virtio_iommu_remap(uint64_t iova, uint64_t pa, uint64_t size) "iova=0x%"PRIx64" pa=0x%" PRIx64" size=0x%"PRIx64""
 virtio_iommu_fill_none_property(uint32_t devid) "devid=%d"
 virtio_iommu_fill_pgsize_mask_property(uint32_t devid, uint64_t pgsize_mask, size_t filled) "dev= %d, pgsize_mask=0x%"PRIx64" filled=0x%lx"
+virtio_iommu_notify_flag_add(const char *iommu) "Add virtio-iommu notifier node for memory region %s"
+virtio_iommu_notify_flag_del(const char *iommu) "Del virtio-iommu notifier node for memory region %s"
-- 
2.17.1