Reconfiguration

If the objects are not presently part of the logical partition's configuration, they must be made available to the partition with the use of facilities at the Hardware Management Console. Channel Paths (CHPIDs) may be made available to the target logical partition using the CHPID Operations tasks; reserved storage may be available, but if it isn't, it can be made available by a Security Administrator action by updating the Image profile's Storage page of the Customize/Delete Activation Profiles task. There are many operational considerations relating to reconfiguration that are covered in greater detail in the z/OS MVS Planning: Operations document and the z/OS MVS Programming: Resource Recovery.

The following elements can be reconfigured from the z/OS® Operator's console using a CONFIG command. Such a reconfiguration is limited to the objects owned by the logical partition:

• Logical Processors
• Central Storage
• Channel Paths

See z/OS MVS System Commands for further detail on the CONFIG command.

z/OS is aware of the logical partition objects it owns, and interacts with PR/SM to reconfigure them using the service call instruction. This Execution of this instruction results in a mandatory interception which causes every use thereof to be mediated by PR/SM. PR/SM mediates the instruction to limit the scope of such requests to the objects that the security administrator defined for the specific logical partition.