diff options
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 188 |
1 files changed, 129 insertions, 59 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index fe565f3a3a91..9c9ec08d78c7 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -17,9 +17,12 @@ config ARCH_HAS_ILOG2_U32 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 @@ -49,6 +52,19 @@ config KASAN_SHADOW_OFFSET depends on KASAN default 0x1C000000000000 +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 S390 def_bool y # @@ -62,10 +78,14 @@ config S390 select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM select ARCH_ENABLE_MEMORY_HOTREMOVE select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 + select ARCH_HAS_CPU_FINALIZE_INIT + select ARCH_HAS_CRC32 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 @@ -75,6 +95,7 @@ config S390 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_PTE_SPECIAL select ARCH_HAS_SCALED_CPUTIME select ARCH_HAS_SET_DIRECT_MAP @@ -82,8 +103,8 @@ config S390 select ARCH_HAS_STRICT_KERNEL_RWX select ARCH_HAS_STRICT_MODULE_RWX select ARCH_HAS_SYSCALL_WRAPPER - select ARCH_HAS_UBSAN_SANITIZE_ALL - select ARCH_HAS_VDSO_DATA + select ARCH_HAS_UBSAN + select ARCH_HAS_VDSO_TIME_DATA select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_INLINE_READ_LOCK select ARCH_INLINE_READ_LOCK_BH @@ -113,6 +134,7 @@ config S390 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_DEBUG_PAGEALLOC @@ -127,15 +149,16 @@ config S390 select ARCH_WANT_DEFAULT_BPF_JIT select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_KERNEL_PMD_MKWRITE + select ARCH_WANT_LD_ORPHAN_WARN select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP select BUILDTIME_TABLE_SORT select CLONE_BACKWARDS2 select DCACHE_WORD_ACCESS if !KMSAN - select DMA_OPS if PCI 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 @@ -152,6 +175,7 @@ config S390 select HAVE_ARCH_KASAN select HAVE_ARCH_KASAN_VMALLOC select HAVE_ARCH_KCSAN + select HAVE_ARCH_KMSAN select HAVE_ARCH_KFENCE select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET select HAVE_ARCH_SECCOMP_FILTER @@ -167,16 +191,18 @@ config S390 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_FAST_GUP + select HAVE_GUP_FAST select HAVE_FENTRY + select HAVE_FTRACE_GRAPH_FUNC select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_ARG_ACCESS_API select HAVE_FUNCTION_ERROR_INJECTION - select HAVE_FUNCTION_GRAPH_RETVAL + select HAVE_FUNCTION_GRAPH_FREGS select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER select HAVE_GCC_PLUGINS @@ -193,16 +219,17 @@ config S390 select HAVE_KPROBES select HAVE_KPROBES_ON_FTRACE select HAVE_KRETPROBES - select HAVE_KVM 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_PREEMPT_DYNAMIC_KEY select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_RELIABLE_STACKTRACE select HAVE_RETHOOK @@ -216,12 +243,15 @@ config S390 select HAVE_VIRT_CPU_ACCOUNTING_IDLE 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 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 @@ -235,7 +265,9 @@ config S390 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 @@ -267,6 +299,9 @@ config ARCH_SUPPORTS_CRASH_DUMP 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 @@ -448,7 +483,7 @@ config COMPAT select COMPAT_OLD_SIGACTION select HAVE_UID16 depends on MULTIUSER - depends on !CC_IS_CLANG + depends on !CC_IS_CLANG && !LD_IS_LLD 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 @@ -505,6 +540,26 @@ config SCHED_TOPOLOGY 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 PROC_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 @@ -549,17 +604,13 @@ config EXPOLINE If unsure, say N. config EXPOLINE_EXTERN - def_bool n - depends on EXPOLINE - depends on CC_IS_GCC && GCC_VERSION >= 110200 - depends on $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC)) - prompt "Generate expolines as extern functions." + def_bool EXPOLINE && CC_IS_GCC && GCC_VERSION >= 110200 && \ + $(success,$(srctree)/arch/s390/tools/gcc-thunk-extern.sh $(CC)) help - This option is required for some tooling like kpatch. The kernel is - compiled with -mindirect-branch=thunk-extern and requires a newer - compiler. - - If unsure, say N. + 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" @@ -582,9 +633,6 @@ config RELOCATABLE help This builds a kernel image that retains relocation information so it can be loaded at an arbitrary address. - The kernel is linked as a position-independent executable (PIE) - and contains dynamic relocations which are processed early in the - bootup process. 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 @@ -599,6 +647,38 @@ config RANDOMIZE_BASE 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 menu "Memory setup" @@ -621,32 +701,6 @@ config MAX_PHYSMEM_BITS Increasing the number of bits also increases the kernel image size. By default 46 bits (64TB) are supported. -config CHECK_STACK - def_bool y - depends on !VMAP_STACK - prompt "Detect kernel stack overflow" - 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. - - Say N if you are unsure. - -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. - endmenu menu "I/O subsystem" @@ -712,6 +766,33 @@ config EADM_SCH 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" @@ -728,7 +809,7 @@ config VFIO_AP prompt "VFIO support for AP devices" depends on KVM depends on VFIO - depends on ZCRYPT + depends on AP select VFIO_MDEV help This driver grants access to Adjunct Processor (AP) devices @@ -748,17 +829,6 @@ config HAVE_PNETID menu "Virtualization" -config PROTECTED_VIRTUALIZATION_GUEST - def_bool n - prompt "Protected virtualization guest support" - help - Select this option, if you want to be able to run this - kernel as a protected virtualization KVM guest. - Protected virtualization capable machines have a mini hypervisor - located at machine level (an ultravisor). With help of the - Ultravisor, KVM will be able to run "protected" VMs, special - VMs whose memory and management data are unavailable to KVM. - config PFAULT def_bool y prompt "Pseudo page fault support" |