diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 20f9a527922a6a04f84670e7538e7abbc1ece7d1..7b02bcc85b9ead2ced4308c6ff8a120006c1c793 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -80,6 +80,7 @@ enum iommu_attr {
 	DOMAIN_ATTR_FSL_PAMU_STASH,
 	DOMAIN_ATTR_FSL_PAMU_ENABLE,
 	DOMAIN_ATTR_FSL_PAMUV1,
+	DOMAIN_ATTR_NESTING,	/* two stages of translation */
 	DOMAIN_ATTR_MAX,
 };