CONFIG_IA64_SGI_SN_SIM is not available for thedefaultarchitecture x86.
Result is shown for architecture ia64
default or selected kernelversion does not have config value CONFIG_IA64_SGI_SN_SIM.
Result is shown for kernelversion 5.4.123

SGI Medusa Simulator Support

configname: CONFIG_IA64_SGI_SN_SIM

IA-64 Linux Kernel Configuration
└─>Processor type and features
└─>SGI Medusa Simulator Support
In linux kernel since version 2.6.12  
If you are compiling a kernel that will run under SGI's IA-64
simulator (Medusa) then say Y, otherwise say N.