Listing channel paths with lschp

Red Hat Enterprise Linux 9.2 KVM guest

Linux as a KVM guest on IBM Z includes a channel path, with CHPID 00, for paravirtualized CCW devices.

The virtual channel subsystem always provides the same single channel path for all paravirtualized CCW devices to the guest. The following sample output for lschp shows this channel path:

# lschp
CHPID Vary Cfg. Type Cmg Shared PCHID
============================================
0.00  1    -    32   -   0      -

Attention: Setting this channel path logically offline would make all paravirtualized CCW devices inaccessible to the guest. As a consequence, the system is likely to crash.

Depending on the presence of passthrough CCW devices, there can also be output lines for other devices.