[RFC PATCH 3/4] memory: add interface for triggering IOMMU notify_flag_changed handler

[Viktor Prutyanov <viktor@daynix.com>]

This interface helps if IOMMU notify_flag_changed should be triggered
after changing IOMMU notifier flags in the runtime.

Signed-off-by: Viktor Prutyanov <viktor@daynix.com>
---
 include/exec/memory.h |  2 ++
 softmmu/memory.c      | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 2e602a2fad..c8d5f69add 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1772,6 +1772,8 @@ void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n);
 void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
                                              IOMMUNotifier *n);
 
+void memory_region_iommu_notify_flags_changed(MemoryRegion *mr);
+
 /**
  * memory_region_iommu_get_attr: return an IOMMU attr if get_attr() is
  * defined on the IOMMU.
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 9d64efca26..e4a53cde6c 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -1950,6 +1950,18 @@ void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
     }
 }
 
+void memory_region_iommu_notify_flags_changed(MemoryRegion *mr)
+{
+    IOMMUMemoryRegion *iommu_mr;
+
+    if (mr->alias) {
+        memory_region_iommu_notify_flags_changed(mr->alias);
+        return;
+    }
+    iommu_mr = IOMMU_MEMORY_REGION(mr);
+    memory_region_update_iommu_notify_flags(iommu_mr, NULL);
+}
+
 void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
                                              IOMMUNotifier *n)
 {
-- 
2.21.0