CONFIG_IA64_DIG is not available for thedefaultarchitecture x86.
Result is shown for architecture ia64
default or selected kernelversion does not have config value CONFIG_IA64_DIG.
Result is shown for kernelversion 6.9.9

DIG-compliant

configname: CONFIG_IA64_DIG

System type
└─>DIG-compliant
In linux kernel since version 2.6.12  
selects
CONFIG_SWIOTLB