You need a boot device that is prepared with zipl.
Procedure
Perform these steps to boot from a tape boot device:
In the navigation pane of the HMC, expand Systems
Management and select the hardware system that you want to work with. A table of LPARs
is displayed on the Partitions tab in the content area.
Select the LPAR where you want to boot Linux.
In the Tasks area, expand Recovery and
click Load (see Figure 1).
Select load type Standard load.
Select the Clear the main memory on this partition before loading
it check box only if you must clear memory. Memory clearing can considerably prolong the
IPL procedure.
Enter the device number of the tape boot device in the Load
address field.
Click OK to start the boot process.
Results
Check the output on the preferred console to
monitor the boot progress.