CONFIG_KVM_BOOK3S_64_HANDLER is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

CONFIG_KVM_BOOK3S_64_HANDLER (not configurable)

modulename: book3s_64_exports.ko

configname: CONFIG_KVM_BOOK3S_64_HANDLER

Linux Kernel Configuration
└─>Virtualization
└─>KVM_BOOK3S_64_HANDLER
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
source code:
arch/powerpc/kvm/book3s_64_exports.c

is depended by
CONFIG_KVM_BOOK3S_64