Specifying kernel parameters when booting Linux
Depending on the boot device and whether you boot Linux® in a z/VM® guest virtual machine or in LPAR mode, you can provide kernel parameters when you start the boot process.
- zipl interactive boot menu on DASD
- When booting Linux on z/VM or in LPAR mode with a zipl interactive boot menu on a DASD boot device, you can display the menu and specify kernel parameters as you select a boot configuration.
- z/VM guest virtual machine with a CCW boot device
- When booting Linux in a z/VM guest virtual machine from a CCW boot device, you can use the PARM parameter of the IPL command to specify kernel parameters. CCW boot devices include DASD, tape, and the z/VM reader.
- z/VM guest virtual machine with a SCSI, NVMe, or list-directed ECKD boot device
- When booting Linux in a z/VM guest virtual machine from a SCSI, NVMe, or list-directed ECKD boot device, you can use the SET LOADDEV command with the SCPDATA option to specify kernel parameters.
- LPAR mode with a SCSI, NVMe, or list-directed ECKD boot device
- When booting Linux in LPAR mode from a SCSI, NVMe, or list-directed ECKD boot device, you can specify kernel parameters in the OS load parameters field on the HMC Load panel.
Kernel parameters as entered from a CMS or CP session are interpreted as lowercase on Linux.