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

Use 1 TC on each available VPE for SMP

modulename: smp-mt.ko

configname: CONFIG_MIPS_MT_SMP

MIPS MT options
└─>Use 1 TC on each available VPE for SMP
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
This is a kernel model which is also known a VSMP or lately
has been marketesed into SMVP.

source code:
arch/mips/kernel/smp-mt.c