CONFIG_S390 is not available for thedefaultarchitecture x86.
Result is shown for architecture s390

CONFIG_S390 (not configurable)

configname: CONFIG_S390

Linux Kernel Configuration
└─>S390
In linux kernel since version 2.6.16 (release Date: 2006-03-19)  
selects
CONFIG_ALTERNATE_USER_ADDRESS_SPACE
CONFIG_ARCH_32BIT_USTAT_F_TINODE
CONFIG_ARCH_BINFMT_ELF_STATE
CONFIG_ARCH_CORRECT_STACKTRACE_ON_KRETPROBE
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE
CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK
CONFIG_ARCH_HAS_CURRENT_STACK_POINTER
CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE
CONFIG_ARCH_HAS_DEBUG_WX
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED
CONFIG_ARCH_HAS_ELF_RANDOMIZE
CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
CONFIG_ARCH_HAS_FORTIFY_SOURCE
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL
CONFIG_ARCH_HAS_GIGANTIC_PAGE
CONFIG_ARCH_HAS_KCOV
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE
CONFIG_ARCH_HAS_MEM_ENCRYPT
CONFIG_ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
CONFIG_ARCH_HAS_PTE_SPECIAL
CONFIG_ARCH_HAS_SCALED_CPUTIME
CONFIG_ARCH_HAS_SET_DIRECT_MAP
CONFIG_ARCH_HAS_SET_MEMORY
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX
CONFIG_ARCH_HAS_STRICT_MODULE_RWX
CONFIG_ARCH_HAS_SYSCALL_WRAPPER
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL
CONFIG_ARCH_HAS_VDSO_DATA
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
CONFIG_ARCH_INLINE_READ_LOCK
CONFIG_ARCH_INLINE_READ_LOCK_BH
CONFIG_ARCH_INLINE_READ_LOCK_IRQ
CONFIG_ARCH_INLINE_READ_LOCK_IRQSAVE
CONFIG_ARCH_INLINE_READ_TRYLOCK
CONFIG_ARCH_INLINE_READ_UNLOCK
CONFIG_ARCH_INLINE_READ_UNLOCK_BH
CONFIG_ARCH_INLINE_READ_UNLOCK_IRQ
CONFIG_ARCH_INLINE_READ_UNLOCK_IRQRESTORE
CONFIG_ARCH_INLINE_SPIN_LOCK
CONFIG_ARCH_INLINE_SPIN_LOCK_BH
CONFIG_ARCH_INLINE_SPIN_LOCK_IRQ
CONFIG_ARCH_INLINE_SPIN_LOCK_IRQSAVE
CONFIG_ARCH_INLINE_SPIN_TRYLOCK
CONFIG_ARCH_INLINE_SPIN_TRYLOCK_BH
CONFIG_ARCH_INLINE_SPIN_UNLOCK
CONFIG_ARCH_INLINE_SPIN_UNLOCK_BH
CONFIG_ARCH_INLINE_SPIN_UNLOCK_IRQ
CONFIG_ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
CONFIG_ARCH_INLINE_WRITE_LOCK
CONFIG_ARCH_INLINE_WRITE_LOCK_BH
CONFIG_ARCH_INLINE_WRITE_LOCK_IRQ
CONFIG_ARCH_INLINE_WRITE_LOCK_IRQSAVE
CONFIG_ARCH_INLINE_WRITE_TRYLOCK
CONFIG_ARCH_INLINE_WRITE_UNLOCK
CONFIG_ARCH_INLINE_WRITE_UNLOCK_BH
CONFIG_ARCH_INLINE_WRITE_UNLOCK_IRQ
CONFIG_ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
CONFIG_ARCH_STACKWALK
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC
CONFIG_ARCH_SUPPORTS_HUGETLBFS
CONFIG_ARCH_SUPPORTS_INT128
CONFIG_ARCH_SUPPORTS_NUMA_BALANCING
CONFIG_ARCH_SUPPORTS_PER_VMA_LOCK
CONFIG_ARCH_USE_BUILTIN_BSWAP
CONFIG_ARCH_USE_CMPXCHG_LOCKREF
CONFIG_ARCH_USE_SYM_ANNOTATIONS
CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
CONFIG_ARCH_WANTS_NO_INSTR
CONFIG_ARCH_WANT_DEFAULT_BPF_JIT
CONFIG_ARCH_WANT_IPC_PARSE_VERSION
CONFIG_ARCH_WANT_KERNEL_PMD_MKWRITE
CONFIG_ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
CONFIG_BUILDTIME_TABLE_SORT
CONFIG_CLONE_BACKWARDS2
CONFIG_DMA_OPS
CONFIG_DYNAMIC_FTRACE
CONFIG_FUNCTION_ALIGNMENT_8B
CONFIG_FUNCTION_ALIGNMENT_16B
CONFIG_GENERIC_ALLOCATOR
CONFIG_GENERIC_CPU_AUTOPROBE
CONFIG_GENERIC_CPU_VULNERABILITIES
CONFIG_GENERIC_ENTRY
CONFIG_GENERIC_GETTIMEOFDAY
CONFIG_GENERIC_PTDUMP
CONFIG_GENERIC_SMP_IDLE_THREAD
CONFIG_GENERIC_TIME_VSYSCALL
CONFIG_GENERIC_VDSO_TIME_NS
CONFIG_GENERIC_IOREMAP
CONFIG_HAVE_ALIGNED_STRUCT_PAGE
CONFIG_HAVE_ARCH_AUDITSYSCALL
CONFIG_HAVE_ARCH_JUMP_LABEL
CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE
CONFIG_HAVE_ARCH_KASAN
CONFIG_HAVE_ARCH_KASAN_VMALLOC
CONFIG_HAVE_ARCH_KCSAN
CONFIG_HAVE_ARCH_KFENCE
CONFIG_HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
CONFIG_HAVE_ARCH_SECCOMP_FILTER
CONFIG_HAVE_ARCH_SOFT_DIRTY
CONFIG_HAVE_ARCH_STACKLEAK
CONFIG_HAVE_ARCH_TRACEHOOK
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE
CONFIG_HAVE_ARCH_VMAP_STACK
CONFIG_HAVE_ASM_MODVERSIONS
CONFIG_HAVE_CMPXCHG_DOUBLE
CONFIG_HAVE_CMPXCHG_LOCAL
CONFIG_HAVE_DEBUG_KMEMLEAK
CONFIG_HAVE_DMA_CONTIGUOUS
CONFIG_HAVE_DYNAMIC_FTRACE
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS
CONFIG_HAVE_EBPF_JIT
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
CONFIG_HAVE_FAST_GUP
CONFIG_HAVE_FENTRY
CONFIG_HAVE_FTRACE_MCOUNT_RECORD
CONFIG_HAVE_FUNCTION_ARG_ACCESS_API
CONFIG_HAVE_FUNCTION_ERROR_INJECTION
CONFIG_HAVE_FUNCTION_GRAPH_RETVAL
CONFIG_HAVE_FUNCTION_GRAPH_TRACER
CONFIG_HAVE_FUNCTION_TRACER
CONFIG_HAVE_GCC_PLUGINS
CONFIG_HAVE_GENERIC_VDSO
CONFIG_HAVE_IOREMAP_PROT
CONFIG_HAVE_KERNEL_BZIP2
CONFIG_HAVE_KERNEL_GZIP
CONFIG_HAVE_KERNEL_LZ4
CONFIG_HAVE_KERNEL_LZMA
CONFIG_HAVE_KERNEL_LZO
CONFIG_HAVE_KERNEL_UNCOMPRESSED
CONFIG_HAVE_KERNEL_XZ
CONFIG_HAVE_KERNEL_ZSTD
CONFIG_HAVE_KPROBES
CONFIG_HAVE_KPROBES_ON_FTRACE
CONFIG_HAVE_KRETPROBES
CONFIG_HAVE_KVM
CONFIG_HAVE_LIVEPATCH
CONFIG_HAVE_MEMBLOCK_PHYS_MAP
CONFIG_HAVE_MOD_ARCH_SPECIFIC
CONFIG_HAVE_NMI
CONFIG_HAVE_NOP_MCOUNT
CONFIG_HAVE_PCI
CONFIG_HAVE_PERF_EVENTS
CONFIG_HAVE_PERF_REGS
CONFIG_HAVE_PERF_USER_STACK_DUMP
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API
CONFIG_HAVE_RELIABLE_STACKTRACE
CONFIG_HAVE_RETHOOK
CONFIG_HAVE_RSEQ
CONFIG_HAVE_SAMPLE_FTRACE_DIRECT
CONFIG_HAVE_SAMPLE_FTRACE_DIRECT_MULTI
CONFIG_HAVE_SETUP_PER_CPU_AREA
CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK
CONFIG_HAVE_SYSCALL_TRACEPOINTS
CONFIG_HAVE_VIRT_CPU_ACCOUNTING
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_IDLE
CONFIG_IOMMU_HELPER
CONFIG_IOMMU_SUPPORT
CONFIG_KEXEC
CONFIG_MMU_GATHER_MERGE_VMAS
CONFIG_MMU_GATHER_NO_GATHER
CONFIG_MMU_GATHER_RCU_TABLE_FREE
CONFIG_MODULES_USE_ELF_RELA
CONFIG_NEED_DMA_MAP_STATE
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK
CONFIG_NEED_SG_DMA_LENGTH
CONFIG_OLD_SIGACTION
CONFIG_OLD_SIGSUSPEND3
CONFIG_PCI_DOMAINS
CONFIG_PCI_MSI
CONFIG_PCI_MSI_ARCH_FALLBACKS
CONFIG_SPARSE_IRQ
CONFIG_SWIOTLB
CONFIG_SYSCTL_EXCEPTION_TRACE
CONFIG_THREAD_INFO_IN_TASK
CONFIG_TRACE_IRQFLAGS_SUPPORT
CONFIG_TTY
CONFIG_VIRT_CPU_ACCOUNTING
CONFIG_ZONE_DMA