1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1a29ff3df3c5..954b23cecfd1 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -830,6 +830,9 @@ and is between 256 and 4096 characters. It is defined in the file
 
         hvc_iucv=       [S390] Number of z/VM IUCV hypervisor console (HVC)
                                terminal devices. Valid values: 0..8
+        hvc_iucv_allow= [S390] Comma-separated list of z/VM user IDs.
+                               If specified, z/VM IUCV HVC accepts connections
+                               from listed z/VM user IDs only.
 
         i8042.debug     [HW] Toggle i8042 debug mode
         i8042.direct    [HW] Put keyboard port into non-translated mode