s390/cio: add ipldev keyword to cio_ignore
Provide an 'ipldev' keyword to cio_ignore to (un)ignore the
CCW or FCP based boot device.
Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/Documentation/s390/CommonIO b/Documentation/s390/CommonIO
index d378cba..d90a5dd 100644
--- a/Documentation/s390/CommonIO
+++ b/Documentation/s390/CommonIO
@@ -8,9 +8,9 @@
Enable logging of debug information in case of ccw device timeouts.
-* cio_ignore = {all} |
- {<device> | <range of devices>} |
- {!<device> | !<range of devices>}
+* cio_ignore = device[,device[,..]]
+
+ device := {all | [!]ipldev | [!]<devno> | [!]<devno>-<devno>}
The given devices will be ignored by the common I/O-layer; no detection
and device sensing will be done on any of those devices. The subchannel to
@@ -24,9 +24,10 @@
device numbers (0xabcd or abcd, for 2.4 backward compatibility). If you
give a device number 0xabcd, it will be interpreted as 0.0.abcd.
- You can use the 'all' keyword to ignore all devices.
- The '!' operator will cause the I/O-layer to _not_ ignore a device.
- The command line is parsed from left to right.
+ You can use the 'all' keyword to ignore all devices. The 'ipldev' keyword can
+ be used to refer to the CCW based boot device (this is probably useful only
+ when combined with the '!' operator). The '!' operator will cause the I/O-layer
+ to _not_ ignore a device. The command line is parsed from left to right.
For example,
cio_ignore=0.0.0023-0.0.0042,0.0.4711