This callback allows to inform the IOMMU memory region about
restrictions on the supported page sizes.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 include/exec/memory.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 1dcd312..0c91dca 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -204,6 +204,10 @@ typedef struct IOMMUMemoryRegionClass {
                                IOMMUAccessFlags flag);
     /* Returns minimum supported page size */
     uint64_t (*get_min_page_size)(IOMMUMemoryRegion *iommu);
+
+    /* Limits the supported page sizes to @pgsizes */
+    void (*set_page_size_mask)(IOMMUMemoryRegion *iommu, uint64_t pgsizes);
+
     /* Called when IOMMU Notifier flag changed */
     void (*notify_flag_changed)(IOMMUMemoryRegion *iommu,
                                 IOMMUNotifierFlag old_flags,
-- 
2.5.5