CONFIG_MIPS_MT_SMTC is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

SMTC: Use all TCs on all VPEs for SMP

modulename: smtc.ko

configname: CONFIG_MIPS_MT_SMTC

MIPS MT options
└─>SMTC: Use all TCs on all VPEs for SMP
In linux kernel since version 2.6.17 (release Date: 2006-06-17)  
This is a kernel model which is known a SMTC or lately has been
marketesed into SMVP.

source code:
arch/mips/kernel/