kvm_pit_state    1001 include/uapi/linux/kvm.h #define KVM_GET_PIT               _IOWR(KVMIO, 0x65, struct kvm_pit_state)
kvm_pit_state    1002 include/uapi/linux/kvm.h #define KVM_SET_PIT               _IOR(KVMIO,  0x66, struct kvm_pit_state)