Running zipl in configuration-file mode

6.10 LPAR mode z/VM guest KVM guest

In configuration-file mode, you issue the zipl command with command arguments that identify a section in a zipl configuration-file or a Boot Loader Specification (BLS) snippet.

The possible sources of kernel parameters depend on where the details of the boot configuration are specified, in a zipl configuration-file section or in a BLS snippet.

zipl configuration-file section
Boot configurations in a zipl configuration-file section have three potential sources of kernel parameters, as illustrated in Figure 1.
Figure 1. Sources of kernel parameters: zipl configuration-file section
The graphic shows three sources: 1. kernel parameter file, 2. zipl configuration file, 3. command line
zipl concatenates the kernel parameters from these sources in the following order:
  1. Parameters that are specified in the kernel parameter file
  2. Parameters that are specified in the zipl configuration-file
  3. Parameters that are specified on the command line
BLS snippet
Boot configurations in a BLS snippet have two potential sources of kernel parameters, as illustrated in Figure 2.
Figure 2. Sources of kernel parameters: BLS snippet
The graphic shows two sources: 1.BLS snippet, 3. command line
zipl concatenates the kernel parameters from these sources in the following order:
  1. Parameters that are specified in the BLS snippet
  2. Parameters that are specified on the command line