diff options
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 960 |
1 files changed, 628 insertions, 332 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 22f75b504f7f..938e5df75b2d 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -1,7 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 config MMU def_bool y -config ZONE_DMA +config CPU_BIG_ENDIAN def_bool y config LOCKDEP_SUPPORT @@ -10,59 +11,109 @@ config LOCKDEP_SUPPORT config STACKTRACE_SUPPORT def_bool y -config HAVE_LATENCYTOP_SUPPORT - def_bool y - -config RWSEM_GENERIC_SPINLOCK - bool - -config RWSEM_XCHGADD_ALGORITHM - def_bool y - config ARCH_HAS_ILOG2_U32 def_bool n config ARCH_HAS_ILOG2_U64 def_bool n -config GENERIC_HWEIGHT +config ARCH_PROC_KCORE_TEXT 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 ARCH_DMA_ADDR_T_64BIT - def_bool 64BIT - config GENERIC_LOCKBREAK - def_bool y if SMP && PREEMPT + def_bool y if PREEMPTION config PGSTE def_bool y if KVM -config ARCH_SUPPORTS_DEBUG_PAGEALLOC +config AUDIT_ARCH def_bool y -config KEXEC +config NO_IOPORT_MAP def_bool y -config AUDIT_ARCH +config ARCH_SUPPORTS_UPROBES def_bool y -config NO_IOPORT - def_bool y +config KASAN_SHADOW_OFFSET + hex + depends on KASAN + default 0x1C000000000000 -config PCI_QUIRKS - def_bool n +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_STACKPROTECTOR_GLOBAL + def_bool $(cc-option, -mstack-protector-guard=global -mstack-protector-guard-record) config S390 def_bool y - select ARCH_DISCARD_MEMBLOCK - select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE + # + # Note: keep this list sorted alphabetically + # + imply IMA_SECURE_AND_OR_TRUSTED_BOOT + 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_MEMORY_HOTREMOVE + select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 + select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE + 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 @@ -91,81 +142,182 @@ config S390 select ARCH_INLINE_WRITE_UNLOCK_BH select ARCH_INLINE_WRITE_UNLOCK_IRQ select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE - select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS - select ARCH_SAVE_PAGE_KEYS if HIBERNATION + select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE + select ARCH_STACKWALK + select ARCH_SUPPORTS_ATOMIC_RMW + 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_SUPPORTS_NUMA_BALANCING + select ARCH_SUPPORTS_PER_VMA_LOCK + 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 BUILDTIME_EXTABLE_SORT + 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 GENERIC_CLOCKEVENTS - select GENERIC_CPU_DEVICES if !SMP + 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_TIME_VSYSCALL_OLD - select HAVE_ALIGNED_STRUCT_PAGE if SLUB - select HAVE_ARCH_JUMP_LABEL if !MARCH_G5 - select HAVE_ARCH_MUTEX_CPU_RELAX + select GENERIC_TIME_VSYSCALL + select GENERIC_IOREMAP if PCI + select HAVE_ALIGNED_STRUCT_PAGE + select HAVE_ARCH_AUDITSYSCALL + 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 if 64BIT - select HAVE_BPF_JIT if 64BIT && PACK_STACK + 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_C_RECORDMCOUNT select HAVE_DEBUG_KMEMLEAK + select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE - select HAVE_FTRACE_MCOUNT_RECORD + 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_FUNCTION_TRACE_MCOUNT_TEST + select HAVE_GCC_PLUGINS + select HAVE_GENERIC_VDSO + 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_KVM if 64BIT - select HAVE_MEMBLOCK - select HAVE_MEMBLOCK_NODE_MAP + select HAVE_LIVEPATCH + select HAVE_MEMBLOCK_PHYS_MAP select HAVE_MOD_ARCH_SPECIFIC - select HAVE_OPROFILE + 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_PREEMPT_DYNAMIC_KEY select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_RELIABLE_STACKTRACE + select HAVE_RETHOOK + select HAVE_RSEQ + 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_UID16 if 32BIT select HAVE_VIRT_CPU_ACCOUNTING - select VIRT_TO_BUS - select INIT_ALL_POSSIBLE - select KTIME_SCALAR if 32BIT + select HAVE_VIRT_CPU_ACCOUNTING_IDLE + select HOTPLUG_SMT + select IOMMU_HELPER if PCI + select IOMMU_SUPPORT 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 OLD_SIGSUSPEND3 + 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 SPARSE_IRQ + select SWIOTLB select SYSCTL_EXCEPTION_TRACE - select USE_GENERIC_SMP_HELPERS if SMP + 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 -source "init/Kconfig" +config PGTABLE_LEVELS + int + default 5 -source "kernel/Kconfig.freezer" +source "kernel/livepatch/Kconfig" -menu "Processor type and features" +config ARCH_SUPPORTS_KEXEC + def_bool y -config HAVE_MARCH_Z900_FEATURES - def_bool n +config ARCH_SUPPORTS_KEXEC_FILE + def_bool y -config HAVE_MARCH_Z990_FEATURES - def_bool n - select HAVE_MARCH_Z900_FEATURES +config ARCH_SUPPORTS_KEXEC_SIG + def_bool MODULE_SIG_FORMAT -config HAVE_MARCH_Z9_109_FEATURES - def_bool n - select HAVE_MARCH_Z990_FEATURES +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 - select HAVE_MARCH_Z9_109_FEATURES config HAVE_MARCH_Z196_FEATURES def_bool n @@ -175,123 +327,196 @@ config HAVE_MARCH_ZEC12_FEATURES def_bool n select HAVE_MARCH_Z196_FEATURES -choice - prompt "Processor type" - default MARCH_G5 +config HAVE_MARCH_Z13_FEATURES + def_bool n + select HAVE_MARCH_ZEC12_FEATURES -config MARCH_G5 - bool "System/390 model G5 and G6" - depends on !64BIT - help - Select this to build a 31 bit kernel that works - on all ESA/390 and z/Architecture machines. +config HAVE_MARCH_Z14_FEATURES + def_bool n + select HAVE_MARCH_Z13_FEATURES -config MARCH_Z900 - bool "IBM zSeries model z800 and z900" - select HAVE_MARCH_Z900_FEATURES if 64BIT - help - Select this to enable optimizations for model z800/z900 (2064 and - 2066 series). This will enable some optimizations that are not - available on older ESA/390 (31 Bit) only CPUs. +config HAVE_MARCH_Z15_FEATURES + def_bool n + select HAVE_MARCH_Z14_FEATURES -config MARCH_Z990 - bool "IBM zSeries model z890 and z990" - select HAVE_MARCH_Z990_FEATURES if 64BIT - help - Select this to enable optimizations for model z890/z990 (2084 and - 2086 series). The kernel will be slightly faster but will not work - on older machines. +config HAVE_MARCH_Z16_FEATURES + def_bool n + select HAVE_MARCH_Z15_FEATURES -config MARCH_Z9_109 - bool "IBM System z9" - select HAVE_MARCH_Z9_109_FEATURES if 64BIT - help - Select this to enable optimizations for IBM System z9 (2094 and - 2096 series). The kernel will be slightly faster but will not work - on older machines. +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 if 64BIT + 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). The kernel will be slightly faster but will not work - on older machines. + 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 if 64BIT + 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 zEC12" - select HAVE_MARCH_ZEC12_FEATURES if 64BIT + bool "IBM zBC12 and zEC12" + select HAVE_MARCH_ZEC12_FEATURES + depends on $(cc-option,-march=zEC12) help - Select this to enable optimizations for IBM zEC12 (2827 series). The - kernel will be slightly faster but will not work on older machines. + 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. -endchoice +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 64BIT - def_bool y - prompt "64 bit kernel" +config MARCH_Z14 + bool "IBM z14 ZR1 and z14" + select HAVE_MARCH_Z14_FEATURES + depends on $(cc-option,-march=z14) help - Select this option if you have an IBM z/Architecture machine - and want to use the 64 bit addressing mode. + 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 32BIT - def_bool y if !64BIT +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 COMPAT - def_bool y - prompt "Kernel support for 31 bit emulation" - depends on 64BIT - select COMPAT_BINFMT_ELF if BINFMT_ELF - select ARCH_WANT_OLD_COMPAT_IPC - select COMPAT_OLD_SIGACTION +config MARCH_Z16 + bool "IBM z16" + select HAVE_MARCH_Z16_FEATURES + depends on $(cc-option,-march=z16) help - Select this option if you want to enable your system kernel to - handle system-calls from ELF binaries for 31 bit ESA. This option - (and some other stuff like libraries and such) is needed for - executing 31 bit applications. It is safe to say "Y". + Select this to enable optimizations for IBM z16 (3931 and + 3932 series). -config SYSVIPC_COMPAT - def_bool y if COMPAT && SYSVIPC +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). -config KEYS_COMPAT - def_bool y if COMPAT && KEYS +endchoice -config SMP - def_bool y - prompt "Symmetric multi-processing support" - ---help--- - This enables support for systems with more than one CPU. If you have - a system with only one CPU, like most personal computers, say N. If - you have a system with more than one CPU, say Y. +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) - If you say N here, the kernel will run on single and multiprocessor - machines, but will use only one CPU of a multiprocessor machine. If - you say Y here, the kernel will run on many, but not all, - singleprocessor machines. On a singleprocessor machine, the kernel - will run faster if you say N here. +config TUNE_Z15 + bool "IBM z15" + depends on $(cc-option,-mtune=z15) - See also the SMP-HOWTO available at - <http://www.tldp.org/docs.html#howto>. +config TUNE_Z16 + bool "IBM z16" + depends on $(cc-option,-mtune=z16) - Even if you don't know what to do here, say Y. +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 (2-64)" - range 2 64 - depends on SMP - default "32" if !64BIT - default "64" if 64BIT + 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 64 and the + 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 @@ -299,114 +524,193 @@ config NR_CPUS config HOTPLUG_CPU def_bool y - prompt "Support for hot-pluggable CPUs" - depends on SMP + +config NUMA + bool "NUMA support" + depends on SCHED_TOPOLOGY + default n help - Say Y here to be able to turn CPUs off and on. CPUs - can be controlled through /sys/devices/system/cpu/cpu#. - Say N if you want to disable CPU hotplug. + Enable NUMA support -config SCHED_MC - def_bool n + This option adds NUMA support to the kernel. + +config NODES_SHIFT + int + depends on NUMA + default "1" -config SCHED_BOOK +config SCHED_TOPOLOGY def_bool y - prompt "Book scheduler support" - depends on SMP + prompt "Topology scheduler support" + select ARCH_SUPPORTS_SCHED_SMT + select ARCH_SUPPORTS_SCHED_MC + select SCHED_SMT select SCHED_MC help - Book scheduler support improves the CPU scheduler's decision making - when dealing with machines that have several books. + Topology scheduler support improves the CPU scheduler's decision + making when dealing with machines that have multi-threading, + multiple cores or multiple books. -source kernel/Kconfig.preempt +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 MATHEMU +config HIPERDISPATCH_ON def_bool y - prompt "IEEE FPU emulation" - depends on MARCH_G5 + bool "Use hiperdispatch on vertical polarization by default" + depends on SCHED_TOPOLOGY + depends on PROC_SYSCTL help - This option is required for IEEE compliant floating point arithmetic - on older ESA/390 machines. Say Y unless you know your machine doesn't - need this. + 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 +source "kernel/Kconfig.hz" -endmenu +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. -menu "Memory setup" + These certificates will be made available via the keyring named + 'cert_store'. -config ARCH_SPARSEMEM_ENABLE - def_bool y - select SPARSEMEM_VMEMMAP_ENABLE - select SPARSEMEM_VMEMMAP - select SPARSEMEM_STATIC if !64BIT +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. -config ARCH_SPARSEMEM_DEFAULT - def_bool y + With the option enabled the kernel parameter "nobp=0" or "nospec" + can be used to run the kernel in the normal branch prediction mode. -config ARCH_SELECT_MEMORY_MODEL - def_bool y + With the option disabled the modified branch prediction mode is + enabled with the "nobp=1" kernel parameter. -config ARCH_ENABLE_MEMORY_HOTPLUG - def_bool y if SPARSEMEM + If unsure, say N. -config ARCH_ENABLE_MEMORY_HOTREMOVE - def_bool y +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. -config FORCE_MAX_ZONEORDER - int - default "9" + 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" -source "mm/Kconfig" +config EXPOLINE_AUTO + bool "spectre_v2=auto" -config PACK_STACK +config EXPOLINE_FULL + bool "spectre_v2=on" + +endchoice + +config RELOCATABLE def_bool y - prompt "Pack kernel stack" + select ARCH_VMLINUX_NEEDS_RELOCS help - This option enables the compiler option -mkernel-backchain if it - is available. If the option is available the compiler supports - the new stack layout which dramatically reduces the minimum stack - frame size. With an old compiler a non-leaf function needs a - minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With - -mkernel-backchain the minimum size drops to 16 byte on 31 bit - and 24 byte on 64 bit. + 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. - Say Y if you are unsure. +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 CHECK_STACK - def_bool y - prompt "Detect kernel stack overflow" +config RANDOMIZE_IDENTITY_BASE + bool "Randomize the address of the identity mapping base" + depends on RANDOMIZE_BASE + default DEBUG_VM help - This option enables the compiler option -mstack-guard and - -mstack-size if they are available. If the compiler supports them - it will emit additional code to each function prolog to trigger - an illegal operation if the kernel stack is about to overflow. + 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. - Say N if you are unsure. + If unsure, say N -config STACK_GUARD - int "Size of the guard area (128-1024)" - range 128 1024 - depends on CHECK_STACK - default "256" - help - This allows you to specify the size of the guard area at the lower - end of the kernel stack. If the kernel stack points into the guard - area on function entry an illegal operation is triggered. The size - needs to be a power of 2. Please keep in mind that the size of an - interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. - The minimum size for the stack guard should be 256 for 31 bit and - 512 for 64 bit. - -config WARN_DYNAMIC_STACK - def_bool n - prompt "Emit compiler warnings for function with dynamic stack usage" +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 option enables the compiler option -mwarn-dynamicstack. If the - compiler supports this options generates warnings for functions - that dynamically allocate stack space using alloca. + This is the address at which the kernel image is loaded in case + Kernel Address Space Layout Randomization (KASLR) is disabled. - Say N if you are unsure. + 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 + +menu "Memory setup" + +config ARCH_SPARSEMEM_ENABLE + def_bool y + select SPARSEMEM_VMEMMAP_ENABLE + +config ARCH_SPARSEMEM_DEFAULT + def_bool y + +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 @@ -415,7 +719,7 @@ menu "I/O subsystem" config QDIO def_tristate y prompt "QDIO support" - ---help--- + help This driver provides the Queued Direct I/O base support for IBM System z. @@ -424,53 +728,21 @@ config QDIO If unsure, say Y. -menuconfig PCI - bool "PCI support" - default n - depends on 64BIT - select ARCH_SUPPORTS_MSI - select PCI_MSI - help - Enable PCI support. - if PCI config PCI_NR_FUNCTIONS int "Maximum number of PCI functions (1-4096)" range 1 4096 - default "64" + default "512" help This allows you to specify the maximum number of PCI functions which this kernel will support. -source "drivers/pci/Kconfig" -source "drivers/pci/pcie/Kconfig" -source "drivers/pci/hotplug/Kconfig" - -endif # PCI - -config PCI_DOMAINS - def_bool PCI +endif # PCI config HAS_IOMEM def_bool PCI -config IOMMU_HELPER - def_bool PCI - -config HAS_DMA - def_bool PCI - select HAVE_DMA_API_DEBUG - -config NEED_SG_DMA_LENGTH - def_bool PCI - -config HAVE_DMA_ATTRS - def_bool PCI - -config NEED_DMA_MAP_STATE - def_bool PCI - config CHSC_SCH def_tristate m prompt "Support for CHSC subchannels" @@ -490,7 +762,6 @@ config CHSC_SCH config SCM_BUS def_bool y - depends on 64BIT prompt "SCM bus driver" help Bus driver for Storage Class Memory. @@ -506,82 +777,66 @@ config EADM_SCH To compile this driver as a module, choose M here: the module will be called eadm_sch. -endmenu +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). -menu "Dump support" + To compile this driver as a module, choose M here: the + module will be called ap. -config CRASH_DUMP - bool "kernel crash dumps" - depends on 64BIT && SMP - select KEXEC - help - Generate crash dump after being started by kexec. - Crash dump kernels are loaded in the main kernel with kexec-tools - into a specially reserved region and then later executed after - a crash by kdump/kexec. - For more details see Documentation/kdump/kdump.txt + If unsure, say Y (default). -config ZFCPDUMP +config AP_DEBUG def_bool n - prompt "zfcpdump support" - select SMP + prompt "Enable debug features for Adjunct Processor (ap) devices" + depends on AP help - Select this option if you want to build an zfcpdump enabled kernel. - Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. - -endmenu + Say 'Y' here to enable some additional debug features for Adjunct + Processor (ap) devices. -menu "Executable file formats / Emulations" + There will be some more sysfs attributes displayed for ap queues. -source "fs/Kconfig.binfmt" + Do not enable on production level kernel build. -config SECCOMP - def_bool y - prompt "Enable seccomp to safely compute untrusted bytecode" - depends on PROC_FS - help - This kernel feature is useful for number crunching applications - that may need to compute untrusted bytecode during their - execution. By using pipes or other transports made available to - the process as file descriptors supporting the read/write - syscalls, it's possible to isolate those applications in - their own address space using seccomp. Once seccomp is - enabled via /proc/<pid>/seccomp, it cannot be disabled - and the task is only allowed to execute a few safe syscalls - defined by each seccomp mode. - - If unsure, say Y. + If unsure, say N. -endmenu +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. -menu "Power Management" + To compile this driver as a module, choose M here: the + module will be called vfio_ccw. -config ARCH_HIBERNATION_POSSIBLE - def_bool y if 64BIT +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. -source "kernel/power/Kconfig" + To compile this driver as a module, choose M here: the module + will be called vfio_ap. endmenu -source "net/Kconfig" - -config PCMCIA - def_bool n - config CCW def_bool y -source "drivers/Kconfig" - -source "fs/Kconfig" - -source "arch/s390/Kconfig.debug" - -source "security/Kconfig" - -source "crypto/Kconfig" - -source "lib/Kconfig" +config HAVE_PNETID + tristate + default (SMC || CCWGROUP) menu "Virtualization" @@ -598,18 +853,6 @@ config PFAULT Everybody who wants to run Linux under VM != VM4.2 should select this option. -config SHARED_KERNEL - bool "VM shared kernel support" - depends on !JUMP_LABEL - help - Select this option, if you want to share the text segment of the - Linux kernel between different VM guests. This reduces memory - usage with lots of guests but greatly increases kernel size. - Also if a kernel was IPL'ed from a shared segment the kexec system - call will not work. - You should only select this option if you know what you are - doing and want to exploit this feature. - config CMM def_tristate n prompt "Cooperative memory management" @@ -634,7 +877,7 @@ config CMM_IUCV config APPLDATA_BASE def_bool n prompt "Linux - VM Monitor Stream, base infrastructure" - depends on PROC_FS + depends on PROC_SYSCTL help This provides a kernel interface for creating and updating z/VM APPLDATA monitor records. The monitor records are updated at certain time @@ -695,23 +938,33 @@ config APPLDATA_NET_SUM This can also be compiled as a module, which will be called appldata_net_sum.o. -config S390_HYPFS_FS +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. + 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" - depends on 64BIT + select TTY select VIRTUALIZATION select VIRTIO - select VIRTIO_CONSOLE help Enabling this option adds support for virtio based paravirtual device drivers on s390. @@ -720,3 +973,46 @@ config S390_GUEST the KVM hypervisor. endmenu + +config S390_MODULES_SANITY_TEST_HELPERS + def_bool n + +menu "Selftests" + +config S390_UNWIND_SELFTEST + def_tristate n + depends on KUNIT + default KUNIT_ALL_TESTS + 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 n + 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 n + depends on KUNIT + default KUNIT_ALL_TESTS + 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 |