| # SPDX-License-Identifier: GPL-2.0 | |
| config MMU | |
| def_bool y | |
| config CPU_BIG_ENDIAN | |
| def_bool y | |
| config LOCKDEP_SUPPORT | |
| def_bool y | |
| config STACKTRACE_SUPPORT | |
| def_bool y | |
| config ARCH_HAS_ILOG2_U32 | |
| def_bool n | |
| config ARCH_HAS_ILOG2_U64 | |
| def_bool n | |
| config ARCH_PROC_KCORE_TEXT | |
| def_bool y | |
| config ARCH_HAS_CPU_RELAX | |
| def_bool y | |
| config GENERIC_HWEIGHT | |
| def_bool !HAVE_MARCH_Z196_FEATURES | |
| config GENERIC_BUG | |
| def_bool y if BUG | |
| config GENERIC_BUG_RELATIVE_POINTERS | |
| def_bool y | |
| config AUDIT_ARCH | |
| def_bool y | |
| config NO_IOPORT_MAP | |
| def_bool y | |
| config ARCH_SUPPORTS_UPROBES | |
| def_bool y | |
| config KASAN_SHADOW_OFFSET | |
| hex | |
| depends on KASAN | |
| default 0x1C000000000000 | |
| config CC_HAS_BUILTIN_FFS | |
| def_bool !(CC_IS_GCC && GCC_VERSION < 160000) | |
| help | |
| GCC versions before 16.0.0 generate library calls to ffs() | |
| for __builtin_ffs() even when __has_builtin(__builtin_ffs) | |
| is true. | |
| config CC_ASM_FLAG_OUTPUT_BROKEN | |
| def_bool CC_IS_GCC && GCC_VERSION < 140200 | |
| help | |
| GCC versions before 14.2.0 may die with an internal | |
| compiler error in some configurations if flag output | |
| operands are used within inline assemblies. | |
| config CC_HAS_ASM_AOR_FORMAT_FLAGS | |
| def_bool !(CC_IS_CLANG && CLANG_VERSION < 190100) | |
| help | |
| Clang versions before 19.1.0 do not support A, | |
| O, and R inline assembly format flags. | |
| config CC_HAS_ASM_IMMEDIATE_STRINGS | |
| def_bool !(CC_IS_GCC && GCC_VERSION < 90000) | |
| help | |
| GCC versions before 9.0.0 cannot handle strings as immediate | |
| input operands in inline assemblies. | |
| config CC_HAS_STACKPROTECTOR_GLOBAL | |
| def_bool $(cc-option, -mstack-protector-guard=global -mstack-protector-guard-record) | |
| config S390 | |
| def_bool y | |
| # | |
| # Note: keep this list sorted alphabetically | |
| # | |
| select ALTERNATE_USER_ADDRESS_SPACE | |
| select ARCH_32BIT_USTAT_F_TINODE | |
| select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE | |
| select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM | |
| select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 | |
| select ARCH_HAS_PMD_SOFTLEAVES if TRANSPARENT_HUGEPAGE | |
| select ARCH_HAS_CC_CAN_LINK | |
| select ARCH_HAS_CC_PLATFORM | |
| select ARCH_HAS_CPU_FINALIZE_INIT | |
| select ARCH_HAS_CURRENT_STACK_POINTER | |
| select ARCH_HAS_DEBUG_VIRTUAL | |
| select ARCH_HAS_DEBUG_VM_PGTABLE | |
| select ARCH_HAS_DEBUG_WX | |
| select ARCH_HAS_DEVMEM_IS_ALLOWED | |
| select ARCH_HAS_DMA_OPS if PCI | |
| select ARCH_HAS_ELF_RANDOMIZE | |
| select ARCH_HAS_FORCE_DMA_UNENCRYPTED | |
| select ARCH_HAS_FORTIFY_SOURCE | |
| select ARCH_HAS_GCOV_PROFILE_ALL | |
| select ARCH_HAS_GIGANTIC_PAGE | |
| select ARCH_HAS_KCOV | |
| select ARCH_HAS_MEMBARRIER_SYNC_CORE | |
| select ARCH_HAS_MEM_ENCRYPT | |
| select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS | |
| select ARCH_HAS_PREEMPT_LAZY | |
| select ARCH_HAS_PTDUMP | |
| select ARCH_HAS_PTE_SPECIAL | |
| select ARCH_HAS_SCALED_CPUTIME | |
| select ARCH_HAS_SET_DIRECT_MAP | |
| select ARCH_HAS_SET_MEMORY | |
| select ARCH_HAS_STRICT_KERNEL_RWX | |
| select ARCH_HAS_STRICT_MODULE_RWX | |
| select ARCH_HAS_SYSCALL_WRAPPER | |
| select ARCH_HAS_UBSAN | |
| select ARCH_HAS_VDSO_TIME_DATA | |
| select ARCH_HAVE_NMI_SAFE_CMPXCHG | |
| select ARCH_HAVE_TRACE_MMIO_ACCESS | |
| select ARCH_INLINE_READ_LOCK | |
| select ARCH_INLINE_READ_LOCK_BH | |
| select ARCH_INLINE_READ_LOCK_IRQ | |
| select ARCH_INLINE_READ_LOCK_IRQSAVE | |
| select ARCH_INLINE_READ_TRYLOCK | |
| select ARCH_INLINE_READ_UNLOCK | |
| select ARCH_INLINE_READ_UNLOCK_BH | |
| select ARCH_INLINE_READ_UNLOCK_IRQ | |
| select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
| select ARCH_INLINE_SPIN_LOCK | |
| select ARCH_INLINE_SPIN_LOCK_BH | |
| select ARCH_INLINE_SPIN_LOCK_IRQ | |
| select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
| select ARCH_INLINE_SPIN_TRYLOCK | |
| select ARCH_INLINE_SPIN_TRYLOCK_BH | |
| select ARCH_INLINE_SPIN_UNLOCK | |
| select ARCH_INLINE_SPIN_UNLOCK_BH | |
| select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
| select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
| select ARCH_INLINE_WRITE_LOCK | |
| select ARCH_INLINE_WRITE_LOCK_BH | |
| select ARCH_INLINE_WRITE_LOCK_IRQ | |
| select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
| select ARCH_INLINE_WRITE_TRYLOCK | |
| select ARCH_INLINE_WRITE_UNLOCK | |
| select ARCH_INLINE_WRITE_UNLOCK_BH | |
| select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
| select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
| select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE | |
| select ARCH_STACKWALK | |
| select ARCH_SUPPORTS_ATOMIC_RMW | |
| select ARCH_SUPPORTS_CFI | |
| select ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
| select ARCH_SUPPORTS_HUGETLBFS | |
| select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && CC_IS_CLANG | |
| select ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS | |
| select ARCH_HAS_PTE_PROTNONE | |
| select ARCH_SUPPORTS_NUMA_BALANCING | |
| select ARCH_SUPPORTS_PAGE_TABLE_CHECK | |
| select ARCH_SUPPORTS_PER_VMA_LOCK | |
| select ARCH_USES_CFI_GENERIC_LLVM_PASS if CC_IS_CLANG | |
| select ARCH_USE_BUILTIN_BSWAP | |
| select ARCH_USE_CMPXCHG_LOCKREF | |
| select ARCH_USE_SYM_ANNOTATIONS | |
| select ARCH_WANTS_NO_INSTR | |
| select ARCH_WANT_DEFAULT_BPF_JIT | |
| select ARCH_WANT_IPC_PARSE_VERSION | |
| select ARCH_WANT_IRQS_OFF_ACTIVATE_MM | |
| select ARCH_WANT_KERNEL_PMD_MKWRITE | |
| select ARCH_WANT_LD_ORPHAN_WARN | |
| select ARCH_WANTS_THP_SWAP | |
| select BUILDTIME_TABLE_SORT | |
| select CLONE_BACKWARDS2 | |
| select DCACHE_WORD_ACCESS if !KMSAN | |
| select DYNAMIC_FTRACE if FUNCTION_TRACER | |
| select FUNCTION_ALIGNMENT_8B if CC_IS_GCC | |
| select FUNCTION_ALIGNMENT_16B if !CC_IS_GCC | |
| select GENERIC_ALLOCATOR | |
| select GENERIC_CPU_DEVICES | |
| select GENERIC_CPU_AUTOPROBE | |
| select GENERIC_CPU_VULNERABILITIES | |
| select GENERIC_ENTRY | |
| select GENERIC_GETTIMEOFDAY | |
| select GENERIC_SMP_IDLE_THREAD | |
| select GENERIC_IOREMAP if PCI | |
| select GLOB | |
| select HAVE_ALIGNED_STRUCT_PAGE | |
| select HAVE_ARCH_AUDITSYSCALL | |
| select HAVE_ARCH_GET_SECUREBOOT | |
| select HAVE_ARCH_JUMP_LABEL | |
| select HAVE_ARCH_JUMP_LABEL_RELATIVE | |
| select HAVE_ARCH_KASAN | |
| select HAVE_ARCH_KASAN_VMALLOC | |
| select HAVE_ARCH_KCSAN | |
| select HAVE_ARCH_KMSAN | |
| select HAVE_ARCH_KFENCE | |
| select HAVE_ARCH_KSTACK_ERASE | |
| select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET | |
| select HAVE_ARCH_SECCOMP_FILTER | |
| select HAVE_ARCH_SOFT_DIRTY | |
| select HAVE_ARCH_TRACEHOOK | |
| select HAVE_ARCH_TRANSPARENT_HUGEPAGE | |
| select HAVE_ARCH_VMAP_STACK | |
| select HAVE_ASM_MODVERSIONS | |
| select HAVE_BUILDTIME_MCOUNT_SORT | |
| select HAVE_CMPXCHG_DOUBLE | |
| select HAVE_CMPXCHG_LOCAL | |
| select HAVE_DEBUG_KMEMLEAK | |
| select HAVE_DMA_CONTIGUOUS | |
| select HAVE_DYNAMIC_FTRACE | |
| select HAVE_DYNAMIC_FTRACE_WITH_ARGS | |
| select HAVE_FTRACE_REGS_HAVING_PT_REGS | |
| select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS | |
| select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
| select HAVE_EBPF_JIT if HAVE_MARCH_Z196_FEATURES | |
| select HAVE_EFFICIENT_UNALIGNED_ACCESS | |
| select HAVE_GENERIC_TIF_BITS | |
| select HAVE_GUP_FAST | |
| select HAVE_FENTRY | |
| select HAVE_FTRACE_GRAPH_FUNC | |
| select HAVE_FUNCTION_ARG_ACCESS_API | |
| select HAVE_FUNCTION_ERROR_INJECTION | |
| select HAVE_FUNCTION_GRAPH_FREGS | |
| select HAVE_FUNCTION_GRAPH_TRACER | |
| select HAVE_FUNCTION_TRACER | |
| select HAVE_GCC_PLUGINS | |
| select HAVE_IOREMAP_PROT if PCI | |
| select HAVE_KERNEL_BZIP2 | |
| select HAVE_KERNEL_GZIP | |
| select HAVE_KERNEL_LZ4 | |
| select HAVE_KERNEL_LZMA | |
| select HAVE_KERNEL_LZO | |
| select HAVE_KERNEL_UNCOMPRESSED | |
| select HAVE_KERNEL_XZ | |
| select HAVE_KERNEL_ZSTD | |
| select HAVE_KPROBES | |
| select HAVE_KPROBES_ON_FTRACE | |
| select HAVE_KRETPROBES | |
| select HAVE_LIVEPATCH | |
| select HAVE_MEMBLOCK_PHYS_MAP | |
| select HAVE_MOD_ARCH_SPECIFIC | |
| select HAVE_NMI | |
| select HAVE_NOP_MCOUNT | |
| select HAVE_PAGE_SIZE_4KB | |
| select HAVE_PCI | |
| select HAVE_PERF_EVENTS | |
| select HAVE_PERF_REGS | |
| select HAVE_PERF_USER_STACK_DUMP | |
| select HAVE_POSIX_CPU_TIMERS_TASK_WORK | |
| select HAVE_PREEMPT_DYNAMIC_KEY | |
| select HAVE_REGS_AND_STACK_ACCESS_API | |
| select HAVE_RELIABLE_STACKTRACE | |
| select HAVE_RETHOOK | |
| select HAVE_RSEQ | |
| select HAVE_RUST if !EXPOLINE | |
| select HAVE_SAMPLE_FTRACE_DIRECT | |
| select HAVE_SAMPLE_FTRACE_DIRECT_MULTI | |
| select HAVE_SETUP_PER_CPU_AREA | |
| select HAVE_SOFTIRQ_ON_OWN_STACK | |
| select HAVE_STACKPROTECTOR if CC_HAS_STACKPROTECTOR_GLOBAL | |
| select HAVE_SYSCALL_TRACEPOINTS | |
| select HAVE_VIRT_CPU_ACCOUNTING | |
| select HAVE_VIRT_CPU_ACCOUNTING_IDLE | |
| select HOTPLUG_SMT | |
| select IOMMU_HELPER if PCI | |
| select IOMMU_SUPPORT if PCI | |
| select IRQ_MSI_LIB if PCI | |
| select KASAN_VMALLOC if KASAN | |
| select LOCK_MM_AND_FIND_VMA | |
| select MMU_GATHER_MERGE_VMAS | |
| select MMU_GATHER_NO_GATHER | |
| select MMU_GATHER_RCU_TABLE_FREE | |
| select MODULES_USE_ELF_RELA | |
| select NEED_DMA_MAP_STATE if PCI | |
| select NEED_PER_CPU_EMBED_FIRST_CHUNK | |
| select NEED_PROC_VMCORE_DEVICE_RAM if PROC_VMCORE | |
| select NEED_SG_DMA_LENGTH if PCI | |
| select OLD_SIGACTION | |
| select OLD_SIGSUSPEND3 | |
| select PCI_DOMAINS if PCI | |
| select PCI_MSI if PCI | |
| select PCI_MSI_ARCH_FALLBACKS if PCI_MSI | |
| select PCI_QUIRKS if PCI | |
| select HAS_SEPARATE_PREEMPT_RESCHED_BITS | |
| select SPARSE_IRQ | |
| select SWIOTLB | |
| select SWIOTLB_DYNAMIC | |
| select DMA_COHERENT_POOL | |
| select SYSCTL_EXCEPTION_TRACE | |
| select SYSTEM_DATA_VERIFICATION if KEXEC_SIG | |
| select THREAD_INFO_IN_TASK | |
| select TRACE_IRQFLAGS_SUPPORT | |
| select TTY | |
| select USER_STACKTRACE_SUPPORT | |
| select VDSO_GETRANDOM | |
| select VIRT_CPU_ACCOUNTING | |
| select VMAP_STACK | |
| select ZONE_DMA | |
| # Note: keep the above list sorted alphabetically | |
| config SCHED_OMIT_FRAME_POINTER | |
| def_bool y | |
| config PGTABLE_LEVELS | |
| int | |
| default 5 | |
| source "kernel/livepatch/Kconfig" | |
| config ARCH_CC_CAN_LINK | |
| bool | |
| default $(cc_can_link_user,-m64) | |
| config ARCH_USERFLAGS | |
| string | |
| default "-m64" | |
| config ARCH_SUPPORTS_KEXEC | |
| def_bool y | |
| config ARCH_SUPPORTS_KEXEC_FILE | |
| def_bool y | |
| config ARCH_SUPPORTS_KEXEC_SIG | |
| def_bool y | |
| config ARCH_SUPPORTS_KEXEC_PURGATORY | |
| def_bool y | |
| config ARCH_SUPPORTS_CRASH_DUMP | |
| def_bool y | |
| help | |
| Refer to <file:Documentation/arch/s390/zfcpdump.rst> for more details on this. | |
| This option also enables s390 zfcpdump. | |
| See also <file:Documentation/arch/s390/zfcpdump.rst> | |
| config ARCH_DEFAULT_CRASH_DUMP | |
| def_bool y | |
| menu "Processor type and features" | |
| config HAVE_MARCH_Z10_FEATURES | |
| def_bool n | |
| config HAVE_MARCH_Z196_FEATURES | |
| def_bool n | |
| select HAVE_MARCH_Z10_FEATURES | |
| config HAVE_MARCH_ZEC12_FEATURES | |
| def_bool n | |
| select HAVE_MARCH_Z196_FEATURES | |
| config HAVE_MARCH_Z13_FEATURES | |
| def_bool n | |
| select HAVE_MARCH_ZEC12_FEATURES | |
| config HAVE_MARCH_Z14_FEATURES | |
| def_bool n | |
| select HAVE_MARCH_Z13_FEATURES | |
| config HAVE_MARCH_Z15_FEATURES | |
| def_bool n | |
| select HAVE_MARCH_Z14_FEATURES | |
| config HAVE_MARCH_Z16_FEATURES | |
| def_bool n | |
| select HAVE_MARCH_Z15_FEATURES | |
| config HAVE_MARCH_Z17_FEATURES | |
| def_bool n | |
| select HAVE_MARCH_Z16_FEATURES | |
| choice | |
| prompt "Processor type" | |
| default MARCH_Z196 | |
| config MARCH_Z10 | |
| bool "IBM System z10" | |
| select HAVE_MARCH_Z10_FEATURES | |
| depends on $(cc-option,-march=z10) | |
| help | |
| Select this to enable optimizations for IBM System z10 (2097 and 2098 | |
| series). This is the oldest machine generation currently supported. | |
| config MARCH_Z196 | |
| bool "IBM zEnterprise 114 and 196" | |
| select HAVE_MARCH_Z196_FEATURES | |
| depends on $(cc-option,-march=z196) | |
| help | |
| Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
| (2818 and 2817 series). The kernel will be slightly faster but will | |
| not work on older machines. | |
| config MARCH_ZEC12 | |
| bool "IBM zBC12 and zEC12" | |
| select HAVE_MARCH_ZEC12_FEATURES | |
| depends on $(cc-option,-march=zEC12) | |
| help | |
| Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and | |
| 2827 series). The kernel will be slightly faster but will not work on | |
| older machines. | |
| config MARCH_Z13 | |
| bool "IBM z13s and z13" | |
| select HAVE_MARCH_Z13_FEATURES | |
| depends on $(cc-option,-march=z13) | |
| help | |
| Select this to enable optimizations for IBM z13s and z13 (2965 and | |
| 2964 series). The kernel will be slightly faster but will not work on | |
| older machines. | |
| config MARCH_Z14 | |
| bool "IBM z14 ZR1 and z14" | |
| select HAVE_MARCH_Z14_FEATURES | |
| depends on $(cc-option,-march=z14) | |
| help | |
| Select this to enable optimizations for IBM z14 ZR1 and z14 (3907 | |
| and 3906 series). The kernel will be slightly faster but will not | |
| work on older machines. | |
| config MARCH_Z15 | |
| bool "IBM z15" | |
| select HAVE_MARCH_Z15_FEATURES | |
| depends on $(cc-option,-march=z15) | |
| help | |
| Select this to enable optimizations for IBM z15 (8562 | |
| and 8561 series). The kernel will be slightly faster but will not | |
| work on older machines. | |
| config MARCH_Z16 | |
| bool "IBM z16" | |
| select HAVE_MARCH_Z16_FEATURES | |
| depends on $(cc-option,-march=z16) | |
| help | |
| Select this to enable optimizations for IBM z16 (3931 and | |
| 3932 series). | |
| config MARCH_Z17 | |
| bool "IBM z17" | |
| select HAVE_MARCH_Z17_FEATURES | |
| depends on $(cc-option,-march=z17) | |
| help | |
| Select this to enable optimizations for IBM z17 (9175 and | |
| 9176 series). | |
| endchoice | |
| config MARCH_Z10_TUNE | |
| def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
| config MARCH_Z196_TUNE | |
| def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
| config MARCH_ZEC12_TUNE | |
| def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
| config MARCH_Z13_TUNE | |
| def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
| config MARCH_Z14_TUNE | |
| def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
| config MARCH_Z15_TUNE | |
| def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT | |
| config MARCH_Z16_TUNE | |
| def_bool TUNE_Z16 || MARCH_Z16 && TUNE_DEFAULT | |
| config MARCH_Z17_TUNE | |
| def_bool TUNE_Z17 || MARCH_Z17 && TUNE_DEFAULT | |
| choice | |
| prompt "Tune code generation" | |
| default TUNE_DEFAULT | |
| help | |
| Cause the compiler to tune (-mtune) the generated code for a machine. | |
| This will make the code run faster on the selected machine but | |
| somewhat slower on other machines. | |
| This option only changes how the compiler emits instructions, not the | |
| selection of instructions itself, so the resulting kernel will run on | |
| all other machines. | |
| config TUNE_DEFAULT | |
| bool "Default" | |
| help | |
| Tune the generated code for the target processor for which the kernel | |
| will be compiled. | |
| config TUNE_Z10 | |
| bool "IBM System z10" | |
| config TUNE_Z196 | |
| bool "IBM zEnterprise 114 and 196" | |
| depends on $(cc-option,-mtune=z196) | |
| config TUNE_ZEC12 | |
| bool "IBM zBC12 and zEC12" | |
| depends on $(cc-option,-mtune=zEC12) | |
| config TUNE_Z13 | |
| bool "IBM z13s and z13" | |
| depends on $(cc-option,-mtune=z13) | |
| config TUNE_Z14 | |
| bool "IBM z14 ZR1 and z14" | |
| depends on $(cc-option,-mtune=z14) | |
| config TUNE_Z15 | |
| bool "IBM z15" | |
| depends on $(cc-option,-mtune=z15) | |
| config TUNE_Z16 | |
| bool "IBM z16" | |
| depends on $(cc-option,-mtune=z16) | |
| config TUNE_Z17 | |
| bool "IBM z17" | |
| depends on $(cc-option,-mtune=z17) | |
| endchoice | |
| config 64BIT | |
| def_bool y | |
| config COMMAND_LINE_SIZE | |
| int "Maximum size of kernel command line" | |
| default 4096 | |
| range 896 1048576 | |
| help | |
| This allows you to specify the maximum length of the kernel command | |
| line. | |
| config SMP | |
| def_bool y | |
| config NR_CPUS | |
| int "Maximum number of CPUs (2-512)" | |
| range 2 512 | |
| default "64" | |
| help | |
| This allows you to specify the maximum number of CPUs which this | |
| kernel will support. The maximum supported value is 512 and the | |
| minimum value which makes sense is 2. | |
| This is purely to save memory - each supported CPU adds | |
| approximately sixteen kilobytes to the kernel image. | |
| config HOTPLUG_CPU | |
| def_bool y | |
| config NUMA | |
| bool "NUMA support" | |
| depends on SCHED_TOPOLOGY | |
| default n | |
| help | |
| Enable NUMA support | |
| This option adds NUMA support to the kernel. | |
| config NODES_SHIFT | |
| int | |
| depends on NUMA | |
| default "1" | |
| config SCHED_TOPOLOGY | |
| def_bool y | |
| prompt "Topology scheduler support" | |
| select ARCH_SUPPORTS_SCHED_SMT | |
| select ARCH_SUPPORTS_SCHED_MC | |
| select SCHED_SMT | |
| select SCHED_MC | |
| help | |
| Topology scheduler support improves the CPU scheduler's decision | |
| making when dealing with machines that have multi-threading, | |
| multiple cores or multiple books. | |
| config SCHED_TOPOLOGY_VERTICAL | |
| def_bool y | |
| bool "Use vertical CPU polarization by default" | |
| depends on SCHED_TOPOLOGY | |
| help | |
| Use vertical CPU polarization by default if available. | |
| The default CPU polarization is horizontal. | |
| config HIPERDISPATCH_ON | |
| def_bool y | |
| bool "Use hiperdispatch on vertical polarization by default" | |
| depends on SCHED_TOPOLOGY | |
| depends on SYSCTL | |
| help | |
| Hiperdispatch aims to improve the CPU scheduler's decision | |
| making when using vertical polarization by adjusting CPU | |
| capacities dynamically. Set this option to use hiperdispatch | |
| on vertical polarization by default. This can be overwritten | |
| by sysctl's s390.hiperdispatch attribute later on. | |
| source "kernel/Kconfig.hz" | |
| config CERT_STORE | |
| bool "Get user certificates via DIAG320" | |
| depends on KEYS | |
| select CRYPTO_LIB_SHA256 | |
| help | |
| Enable this option if you want to access user-provided secure boot | |
| certificates via DIAG 0x320. | |
| These certificates will be made available via the keyring named | |
| 'cert_store'. | |
| config KERNEL_NOBP | |
| def_bool n | |
| prompt "Enable modified branch prediction for the kernel by default" | |
| help | |
| If this option is selected the kernel will switch to a modified | |
| branch prediction mode if the firmware interface is available. | |
| The modified branch prediction mode improves the behaviour in | |
| regard to speculative execution. | |
| With the option enabled the kernel parameter "nobp=0" or "nospec" | |
| can be used to run the kernel in the normal branch prediction mode. | |
| With the option disabled the modified branch prediction mode is | |
| enabled with the "nobp=1" kernel parameter. | |
| If unsure, say N. | |
| config EXPOLINE | |
| def_bool n | |
| depends on $(cc-option,-mindirect-branch=thunk) | |
| prompt "Avoid speculative indirect branches in the kernel" | |
| help | |
| Compile the kernel with the expoline compiler options to guard | |
| against kernel-to-user data leaks by avoiding speculative indirect | |
| branches. | |
| Requires a compiler with -mindirect-branch=thunk support for full | |
| protection. The kernel may run slower. | |
| If unsure, say N. | |
| config EXPOLINE_EXTERN | |
| def_bool EXPOLINE && CC_IS_GCC && GCC_VERSION >= 110200 && \ | |
| $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC)) | |
| help | |
| Generate expolines as external functions if the compiler supports it. | |
| This option is required for some tooling like kpatch, if expolines | |
| are enabled. The kernel is compiled with | |
| -mindirect-branch=thunk-extern, which requires a newer compiler. | |
| choice | |
| prompt "Expoline default" | |
| depends on EXPOLINE | |
| default EXPOLINE_FULL | |
| config EXPOLINE_OFF | |
| bool "spectre_v2=off" | |
| config EXPOLINE_AUTO | |
| bool "spectre_v2=auto" | |
| config EXPOLINE_FULL | |
| bool "spectre_v2=on" | |
| endchoice | |
| config RELOCATABLE | |
| def_bool y | |
| select ARCH_VMLINUX_NEEDS_RELOCS | |
| help | |
| This builds a kernel image that retains relocation information | |
| so it can be loaded at an arbitrary address. | |
| The relocations make the kernel image about 15% larger (compressed | |
| 10%), but are discarded at runtime. | |
| Note: this option exists only for documentation purposes, please do | |
| not remove it. | |
| config RANDOMIZE_BASE | |
| bool "Randomize the address of the kernel image (KASLR)" | |
| default y | |
| help | |
| In support of Kernel Address Space Layout Randomization (KASLR), | |
| this randomizes the address at which the kernel image is loaded, | |
| as a security feature that deters exploit attempts relying on | |
| knowledge of the location of kernel internals. | |
| config RANDOMIZE_IDENTITY_BASE | |
| bool "Randomize the address of the identity mapping base" | |
| depends on RANDOMIZE_BASE | |
| default DEBUG_VM | |
| help | |
| The identity mapping base address is pinned to zero by default. | |
| Allow randomization of that base to expose otherwise missed | |
| notion of physical and virtual addresses of data structures. | |
| That does not have any impact on the base address at which the | |
| kernel image is loaded. | |
| If unsure, say N | |
| config KERNEL_IMAGE_BASE | |
| hex "Kernel image base address" | |
| range 0x100000 0x1FFFFFE0000000 if !KASAN | |
| range 0x100000 0x1BFFFFE0000000 if KASAN | |
| default 0x3FFE0000000 if !KASAN | |
| default 0x7FFFE0000000 if KASAN | |
| help | |
| This is the address at which the kernel image is loaded in case | |
| Kernel Address Space Layout Randomization (KASLR) is disabled. | |
| In case the Protected virtualization guest support is enabled the | |
| Ultravisor imposes a virtual address limit. If the value of this | |
| option leads to the kernel image exceeding the Ultravisor limit, | |
| this option is ignored and the image is loaded below the limit. | |
| If the value of this option leads to the kernel image overlapping | |
| the virtual memory where other data structures are located, this | |
| option is ignored and the image is loaded above the structures. | |
| endmenu | |
| source "drivers/cpuidle/Kconfig" | |
| menu "Memory setup" | |
| config ARCH_SPARSEMEM_ENABLE | |
| def_bool y | |
| select SPARSEMEM_VMEMMAP_ENABLE | |
| config ARCH_SPARSEMEM_DEFAULT | |
| def_bool y | |
| config ILLEGAL_POINTER_VALUE | |
| hex | |
| default 0xdead000000000000 | |
| config MAX_PHYSMEM_BITS | |
| int "Maximum size of supported physical memory in bits (42-53)" | |
| range 42 53 | |
| default "46" | |
| help | |
| This option specifies the maximum supported size of physical memory | |
| in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
| Increasing the number of bits also increases the kernel image size. | |
| By default 46 bits (64TB) are supported. | |
| endmenu | |
| menu "I/O subsystem" | |
| config QDIO | |
| def_tristate y | |
| prompt "QDIO support" | |
| help | |
| This driver provides the Queued Direct I/O base support for | |
| IBM System z. | |
| To compile this driver as a module, choose M here: the | |
| module will be called qdio. | |
| If unsure, say Y. | |
| if PCI | |
| config PCI_NR_FUNCTIONS | |
| int "Maximum number of PCI functions (1-4096)" | |
| range 1 4096 | |
| default "512" | |
| help | |
| This allows you to specify the maximum number of PCI functions which | |
| this kernel will support. | |
| endif # PCI | |
| config HAS_IOMEM | |
| def_bool PCI | |
| config CHSC_SCH | |
| def_tristate m | |
| prompt "Support for CHSC subchannels" | |
| help | |
| This driver allows usage of CHSC subchannels. A CHSC subchannel | |
| is usually present on LPAR only. | |
| The driver creates a device /dev/chsc, which may be used to | |
| obtain I/O configuration information about the machine and | |
| to issue asynchronous chsc commands (DANGEROUS). | |
| You will usually only want to use this interface on a special | |
| LPAR designated for system management. | |
| To compile this driver as a module, choose M here: the | |
| module will be called chsc_sch. | |
| If unsure, say N. | |
| config SCM_BUS | |
| def_bool y | |
| prompt "SCM bus driver" | |
| help | |
| Bus driver for Storage Class Memory. | |
| config EADM_SCH | |
| def_tristate m | |
| prompt "Support for EADM subchannels" | |
| depends on SCM_BUS | |
| help | |
| This driver allows usage of EADM subchannels. EADM subchannels act | |
| as a communication vehicle for SCM increments. | |
| To compile this driver as a module, choose M here: the | |
| module will be called eadm_sch. | |
| config AP | |
| def_tristate y | |
| prompt "Support for Adjunct Processors (ap)" | |
| help | |
| This driver allows usage to Adjunct Processor (AP) devices via | |
| the ap bus, cards and queues. Supported Adjunct Processors are | |
| the CryptoExpress Cards (CEX). | |
| To compile this driver as a module, choose M here: the | |
| module will be called ap. | |
| If unsure, say Y (default). | |
| config AP_DEBUG | |
| def_bool n | |
| prompt "Enable debug features for Adjunct Processor (ap) devices" | |
| depends on AP | |
| help | |
| Say 'Y' here to enable some additional debug features for Adjunct | |
| Processor (ap) devices. | |
| There will be some more sysfs attributes displayed for ap queues. | |
| Do not enable on production level kernel build. | |
| If unsure, say N. | |
| config VFIO_CCW | |
| def_tristate n | |
| prompt "Support for VFIO-CCW subchannels" | |
| depends on VFIO | |
| select VFIO_MDEV | |
| help | |
| This driver allows usage of I/O subchannels via VFIO-CCW. | |
| To compile this driver as a module, choose M here: the | |
| module will be called vfio_ccw. | |
| config VFIO_AP | |
| def_tristate n | |
| prompt "VFIO support for AP devices" | |
| depends on KVM | |
| depends on VFIO | |
| depends on AP | |
| select VFIO_MDEV | |
| help | |
| This driver grants access to Adjunct Processor (AP) devices | |
| via the VFIO mediated device interface. | |
| To compile this driver as a module, choose M here: the module | |
| will be called vfio_ap. | |
| endmenu | |
| config CCW | |
| def_bool y | |
| config HAVE_PNETID | |
| tristate | |
| default (SMC || CCWGROUP) | |
| menu "Virtualization" | |
| config PFAULT | |
| def_bool y | |
| prompt "Pseudo page fault support" | |
| help | |
| Select this option, if you want to use PFAULT pseudo page fault | |
| handling under VM. If running native or in LPAR, this option | |
| has no effect. If your VM does not support PFAULT, PAGEEX | |
| pseudo page fault handling will be used. | |
| Note that VM 4.2 supports PFAULT but has a bug in its | |
| implementation that causes some problems. | |
| Everybody who wants to run Linux under VM != VM4.2 should select | |
| this option. | |
| config CMM | |
| def_tristate n | |
| prompt "Cooperative memory management" | |
| help | |
| Select this option, if you want to enable the kernel interface | |
| to reduce the memory size of the system. This is accomplished | |
| by allocating pages of memory and put them "on hold". This only | |
| makes sense for a system running under VM where the unused pages | |
| will be reused by VM for other guest systems. The interface | |
| allows an external monitor to balance memory of many systems. | |
| Everybody who wants to run Linux under VM should select this | |
| option. | |
| config CMM_IUCV | |
| def_bool y | |
| prompt "IUCV special message interface to cooperative memory management" | |
| depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) | |
| help | |
| Select this option to enable the special message interface to | |
| the cooperative memory management. | |
| config APPLDATA_BASE | |
| def_bool n | |
| prompt "Linux - VM Monitor Stream, base infrastructure" | |
| depends on SYSCTL | |
| help | |
| This provides a kernel interface for creating and updating z/VM APPLDATA | |
| monitor records. The monitor records are updated at certain time | |
| intervals, once the timer is started. | |
| Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
| i.e. enables or disables monitoring on the Linux side. | |
| A custom interval value (in seconds) can be written to | |
| /proc/appldata/interval. | |
| Defaults are 60 seconds interval and timer off. | |
| The /proc entries can also be read from, showing the current settings. | |
| config APPLDATA_MEM | |
| def_tristate m | |
| prompt "Monitor memory management statistics" | |
| depends on APPLDATA_BASE && VM_EVENT_COUNTERS | |
| help | |
| This provides memory management related data to the Linux - VM Monitor | |
| Stream, like paging/swapping rate, memory utilisation, etc. | |
| Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
| APPLDATA monitor record, i.e. enables or disables monitoring this record | |
| on the z/VM side. | |
| Default is disabled. | |
| The /proc entry can also be read from, showing the current settings. | |
| This can also be compiled as a module, which will be called | |
| appldata_mem.o. | |
| config APPLDATA_OS | |
| def_tristate m | |
| prompt "Monitor OS statistics" | |
| depends on APPLDATA_BASE | |
| help | |
| This provides OS related data to the Linux - VM Monitor Stream, like | |
| CPU utilisation, etc. | |
| Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
| APPLDATA monitor record, i.e. enables or disables monitoring this record | |
| on the z/VM side. | |
| Default is disabled. | |
| This can also be compiled as a module, which will be called | |
| appldata_os.o. | |
| config APPLDATA_NET_SUM | |
| def_tristate m | |
| prompt "Monitor overall network statistics" | |
| depends on APPLDATA_BASE && NET | |
| help | |
| This provides network related data to the Linux - VM Monitor Stream, | |
| currently there is only a total sum of network I/O statistics, no | |
| per-interface data. | |
| Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
| APPLDATA monitor record, i.e. enables or disables monitoring this record | |
| on the z/VM side. | |
| Default is disabled. | |
| This can also be compiled as a module, which will be called | |
| appldata_net_sum.o. | |
| config S390_HYPFS | |
| def_bool y | |
| prompt "s390 hypervisor information" | |
| help | |
| This provides several binary files at (debugfs)/s390_hypfs/ to | |
| provide accounting information in an s390 hypervisor environment. | |
| config S390_HYPFS_FS | |
| def_bool n | |
| prompt "s390 hypervisor file system support" | |
| select SYS_HYPERVISOR | |
| depends on S390_HYPFS | |
| help | |
| This is a virtual file system intended to provide accounting | |
| information in an s390 hypervisor environment. This file system | |
| is deprecated and should not be used. | |
| Say N if you are unsure. | |
| source "arch/s390/kvm/Kconfig" | |
| config S390_GUEST | |
| def_bool y | |
| prompt "s390 support for virtio devices" | |
| select TTY | |
| select VIRTUALIZATION | |
| select VIRTIO | |
| help | |
| Enabling this option adds support for virtio based paravirtual device | |
| drivers on s390. | |
| Select this option if you want to run the kernel as a guest under | |
| the KVM hypervisor. | |
| endmenu | |
| config S390_MODULES_SANITY_TEST_HELPERS | |
| def_bool n | |
| menu "Selftests" | |
| config S390_UNWIND_SELFTEST | |
| def_tristate KUNIT_ALL_TESTS | |
| depends on KUNIT | |
| prompt "Test unwind functions" | |
| help | |
| This option enables s390 specific stack unwinder testing kernel | |
| module. This option is not useful for distributions or general | |
| kernels, but only for kernel developers working on architecture code. | |
| Say N if you are unsure. | |
| config S390_KPROBES_SANITY_TEST | |
| def_tristate KUNIT_ALL_TESTS | |
| prompt "Enable s390 specific kprobes tests" | |
| depends on KPROBES | |
| depends on KUNIT | |
| help | |
| This option enables an s390 specific kprobes test module. This option | |
| is not useful for distributions or general kernels, but only for kernel | |
| developers working on architecture code. | |
| Say N if you are unsure. | |
| config S390_MODULES_SANITY_TEST | |
| def_tristate KUNIT_ALL_TESTS | |
| depends on KUNIT && m | |
| prompt "Enable s390 specific modules tests" | |
| select S390_MODULES_SANITY_TEST_HELPERS | |
| help | |
| This option enables an s390 specific modules test. This option is | |
| not useful for distributions or general kernels, but only for | |
| kernel developers working on architecture code. | |
| Say N if you are unsure. | |
| endmenu |