iommu: Implement DOMAIN_ATTR_PAGING attribute

This attribute of a domain can be queried to find out if the
domain supports setting up page-tables using the iommu_map()
and iommu_unmap() functions.

Signed-off-by: Joerg Roedel <joro@8bytes.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7e6ce7260b1c..26066f54a849 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -59,6 +59,7 @@ struct iommu_domain {
 
 enum iommu_attr {
         DOMAIN_ATTR_GEOMETRY,
+        DOMAIN_ATTR_PAGING,
         DOMAIN_ATTR_MAX,
 };