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[RFC,v6,19/22] memory.h: Add set_page_size_mask IOMMUMemoryRegion callback

Message ID 1518461904-5305-20-git-send-email-eric.auger@redhat.com
State New
Headers show
Series VIRTIO-IOMMU device | expand

Commit Message

Eric Auger Feb. 12, 2018, 6:58 p.m. UTC 
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(+)
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Patch

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 783ef64..1c0374f 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -208,6 +208,10 @@  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,