Kernel parameters
The kernel parameters are in form of an ASCII text string. If the boot device is tape or the z/VM® reader, the string can also be encoded in EBCDIC.
Individual kernel parameters are single keywords or keyword/value pairs of the form keyword=<value> with no blank. Blanks are used to separate consecutive parameters.
If you use the zipl command to prepare your boot device, you can provide kernel parameters on the command line, in a parameter file, and in a zipl configuration file. The configuration file, zipl.conf, has a man page.