default or selected kernelversion does not have config value CONFIG_KVM_ELIDE_TLB_FLUSH_IF_YOUNG.
Result is shown for kernelversion 6.6.76

CONFIG_KVM_ELIDE_TLB_FLUSH_IF_YOUNG (not configurable)

configname: CONFIG_KVM_ELIDE_TLB_FLUSH_IF_YOUNG

Linux Kernel Configuration
└─>KVM_ELIDE_TLB_FLUSH_IF_YOUNG
In linux kernel since version 6.13 (release Date: 2025-01-19)