KVM Guest support

modulename: kvm.ko

configname: CONFIG_KVM_GUEST

Linux Kernel Configuration for x86
└─>Processor type and features
└─>Paravirtualized guest support
└─>KVM Guest support
In linux kernel since version 2.6.26 (release Date: 2008-07-13)  
This option enables various optimizations for running under the KVM
hypervisor.

source code:
arch/x86/kernel/kvm.c