CONFIG_EXPOLINE_MEDIUM is not available for thedefaultarchitecture x86.
Result is shown for architecture s390
default or selected kernelversion does not have config value CONFIG_EXPOLINE_MEDIUM.
Result is shown for kernelversion 6.4.14
spectre_v2=auto
configname: CONFIG_EXPOLINE_MEDIUM
Expoline default
└─>spectre_v2=auto