default or selected kernelversion does not have config value CONFIG_HAVE_KVM.
Result is shown for kernelversion 6.9.9

CONFIG_HAVE_KVM (not configurable)

configname: CONFIG_HAVE_KVM

Linux Kernel Configuration
└─>HAVE_KVM
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
is selected by
CONFIG_KVM