[S390] hvc_iucv: Provide IUCV z/VM user ID filtering

This patch introduces the kernel parameter hvc_iucv_allow= that specifies
a comma-separated list of z/VM user IDs.
If specified, the z/VM IUCV hypervisor console device driver accepts IUCV
connections from listed z/VM user IDs only.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 54f21a5c262b..9f932a76a940 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -829,6 +829,9 @@ 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