KVM_TRC_SHIFT      21 include/uapi/linux/kvm.h #define KVM_TRC_ENTRYEXIT       (1 << KVM_TRC_SHIFT)
KVM_TRC_SHIFT      22 include/uapi/linux/kvm.h #define KVM_TRC_HANDLER         (1 << (KVM_TRC_SHIFT + 1))