Control program identification

Red Hat Enterprise Linux 9.2 LPAR mode

For Linux® in LPAR mode, you can provide data about the Linux instance to the control program identification (CPI) feature.

The data is used, for example, to represent the Linux instance on the HMC or SE.

You can provide data to the CPI feature in two ways:

For settings that are persistent across reboots, set values for one or more settings in the /etc/sysconfig/cpi configuration file. The file is read by the cpi.service at boot. See Providing CPI values through a configuration file.
For settings that apply to the running Linux instance only, use the sysfs attributes in /sys/firmware/cpi to change the CPI settings for the running system only. Then transfer the data to the SE.

Red Hat® Enterprise Linux 9.2 provides a systemd service unit, cpi, to set the attributes automatically during reboot. To automatically set the attributes during reboot, issue a command as follows:

# systemctl enable cpi