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

CONFIG_MIPS (not configurable)

configname: CONFIG_MIPS

Linux Kernel Configuration
└─>MIPS
In linux kernel since version 2.6.12  
selects
CONFIG_ARCH_32BIT_OFF_T
CONFIG_ARCH_BINFMT_ELF_STATE
CONFIG_ARCH_CLOCKSOURCE_DATA
CONFIG_ARCH_HAS_CPU_FINALIZE_INIT
CONFIG_ARCH_HAS_TICK_BROADCAST
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL
CONFIG_ARCH_SUPPORTS_UPROBES
CONFIG_ARCH_USE_BUILTIN_BSWAP
CONFIG_ARCH_USE_CMPXCHG_LOCKREF
CONFIG_ARCH_USE_QUEUED_RWLOCKS
CONFIG_ARCH_USE_QUEUED_SPINLOCKS
CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
CONFIG_ARCH_WANT_IPC_PARSE_VERSION
CONFIG_BUILDTIME_EXTABLE_SORT
CONFIG_CLONE_BACKWARDS
CONFIG_CPU_NO_EFFICIENT_FFS
CONFIG_CPU_PM
CONFIG_GENERIC_ATOMIC64
CONFIG_GENERIC_CLOCKEVENTS
CONFIG_GENERIC_CMOS_UPDATE
CONFIG_GENERIC_CPU_AUTOPROBE
CONFIG_GENERIC_GETTIMEOFDAY
CONFIG_GENERIC_IOMAP
CONFIG_GENERIC_IRQ_PROBE
CONFIG_GENERIC_IRQ_SHOW
CONFIG_GENERIC_ISA_DMA
CONFIG_GENERIC_LIB_ASHLDI3
CONFIG_GENERIC_LIB_ASHRDI3
CONFIG_GENERIC_LIB_CMPDI2
CONFIG_GENERIC_LIB_LSHRDI3
CONFIG_GENERIC_LIB_UCMPDI2
CONFIG_GENERIC_SCHED_CLOCK
CONFIG_GENERIC_SMP_IDLE_THREAD
CONFIG_GENERIC_TIME_VSYSCALL
CONFIG_GUP_GET_PTE_LOW_HIGH
CONFIG_HANDLE_DOMAIN_IRQ
CONFIG_HAVE_ARCH_COMPILER_H
CONFIG_HAVE_ARCH_JUMP_LABEL
CONFIG_HAVE_ARCH_KGDB
CONFIG_HAVE_ARCH_MMAP_RND_BITS
CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
CONFIG_HAVE_ARCH_SECCOMP_FILTER
CONFIG_HAVE_ARCH_TRACEHOOK
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE
CONFIG_HAVE_ASM_MODVERSIONS
CONFIG_HAVE_CBPF_JIT
CONFIG_HAVE_EBPF_JIT
CONFIG_HAVE_CONTEXT_TRACKING
CONFIG_HAVE_COPY_THREAD_TLS
CONFIG_HAVE_C_RECORDMCOUNT
CONFIG_HAVE_DEBUG_KMEMLEAK
CONFIG_HAVE_DEBUG_STACKOVERFLOW
CONFIG_HAVE_DMA_CONTIGUOUS
CONFIG_HAVE_DYNAMIC_FTRACE
CONFIG_HAVE_EXIT_THREAD
CONFIG_HAVE_FAST_GUP
CONFIG_HAVE_FTRACE_MCOUNT_RECORD
CONFIG_HAVE_FUNCTION_GRAPH_TRACER
CONFIG_HAVE_FUNCTION_TRACER
CONFIG_HAVE_IDE
CONFIG_HAVE_IOREMAP_PROT
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK
CONFIG_HAVE_IRQ_TIME_ACCOUNTING
CONFIG_HAVE_KPROBES
CONFIG_HAVE_KRETPROBES
CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION
CONFIG_HAVE_MEMBLOCK_NODE_MAP
CONFIG_HAVE_MOD_ARCH_SPECIFIC
CONFIG_HAVE_NMI
CONFIG_HAVE_OPROFILE
CONFIG_HAVE_PERF_EVENTS
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API
CONFIG_HAVE_RSEQ
CONFIG_HAVE_STACKPROTECTOR
CONFIG_HAVE_SYSCALL_TRACEPOINTS
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN
CONFIG_HAVE_GENERIC_VDSO
CONFIG_IRQ_FORCED_THREADING
CONFIG_ISA
CONFIG_MODULES_USE_ELF_RELA
CONFIG_MODULES_USE_ELF_REL
CONFIG_PERF_USE_VMALLOC
CONFIG_RTC_LIB
CONFIG_SYSCTL_EXCEPTION_TRACE
CONFIG_VIRT_TO_BUS
CONFIG_ARCH_HAS_PTE_SPECIAL