CONFIG_KVM_ARM_HOST is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
KVM host support for ARM cpus.
modulename: kvm.ko
configname: CONFIG_KVM_ARM_HOST
Linux Kernel Configuration
└─>Virtualization
└─>KVM host support for ARM cpus.
In linux kernel since version 3.1 (release Date: 2011-10-24)
Provides host support for ARM processors.