CONFIG_KVM is not available for the selected architecture x86.
Result is shown for architecture powerpc

CONFIG_KVM (not configurable)

modulename: kvm.ko

and/or

vhe/ nvhe/ pgtable.ko

configname: CONFIG_KVM

Linux Kernel Configuration
└─>Virtualization
└─>KVM
In linux kernel since version 2.6.20 (release Date: 2007-02-04)