1 files changed, 4 insertions, 1 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index cc85a9278190..d005487c1a22 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -999,7 +999,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         With this option on every unmap_single operation will
                         result in a hardware IOTLB flush operation as opposed
                         to batching them for performance.
-
+                sp_off [Default Off]
+                        By default, super page will be supported if Intel IOMMU
+                        has the capability. With this option, super page will
+                        not be supported.
         intremap=       [X86-64, Intel-IOMMU]
                         Format: { on (default) | off | nosid }
                         on      enable Interrupt Remapping (default)