Function unavailable or degraded in Linux on z/VM

SUSE Linux Enterprise Server 15 SP5 z/VM guest

For some functions, Linux® on z/VM® issues diagnose instructions to the z/VM hypervisor.

Which diagnose codes are available to your Linux instance depends on the z/VM version and configuration. The z/VM administrator can enable, disable, or customize diagnose instructions. For details, see z/VM: CP Commands and Utilities Reference, SC24-6268.

Linux on z/VM can fail, or one or more functions might be unavailable or degraded if required diagnose instructions are modified or unavailable.

Read and compare /sys/kernel/debug/diag_stat to obtain a list of calls and a counter for each call ( The counts include failed calls. Thus, comparing the counts with and without running the affected workload provides an indication of the calls that the workload uses or tries to use. Assure that these calls are not restricted by the z/VM configuration.