CONFIG_KVM_BOOK3S_HV_EXIT_TIMING is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

CONFIG_KVM_BOOK3S_HV_EXIT_TIMING (not configurable)

configname: CONFIG_KVM_BOOK3S_HV_EXIT_TIMING

Linux Kernel Configuration
└─>Virtualization
└─>KVM_BOOK3S_HV_EXIT_TIMING
In linux kernel since version 3.10 (release Date: 2013-06-30)