CONFIG_TUNE_Z990 is not available for thedefaultarchitecture x86.
Result is shown for architecture s390
default or selected kernelversion does not have config value CONFIG_TUNE_Z990.
Result is shown for kernelversion 6.9.9
IBM zSeries model z890 and z990
configname: CONFIG_TUNE_Z990
Tune code generation
└─>IBM zSeries model z890 and z990