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949 lines
26 KiB
949 lines
26 KiB
# SPDX-License-Identifier: GPL-2.0 |
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config MMU |
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def_bool y |
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config CPU_BIG_ENDIAN |
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def_bool y |
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config LOCKDEP_SUPPORT |
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def_bool y |
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config STACKTRACE_SUPPORT |
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def_bool y |
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config ARCH_HAS_ILOG2_U32 |
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def_bool n |
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config ARCH_HAS_ILOG2_U64 |
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def_bool n |
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config GENERIC_HWEIGHT |
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def_bool y |
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config GENERIC_BUG |
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def_bool y if BUG |
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config GENERIC_BUG_RELATIVE_POINTERS |
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def_bool y |
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config GENERIC_LOCKBREAK |
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def_bool y if PREEMPTION |
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config PGSTE |
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def_bool y if KVM |
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config AUDIT_ARCH |
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def_bool y |
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config NO_IOPORT_MAP |
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def_bool y |
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config PCI_QUIRKS |
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def_bool n |
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config ARCH_SUPPORTS_UPROBES |
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def_bool y |
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config KASAN_SHADOW_OFFSET |
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hex |
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depends on KASAN |
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default 0x18000000000000 |
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config S390 |
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def_bool y |
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# |
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# Note: keep this list sorted alphabetically |
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# |
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imply IMA_SECURE_AND_OR_TRUSTED_BOOT |
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select ARCH_32BIT_USTAT_F_TINODE |
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select ARCH_BINFMT_ELF_STATE |
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select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM |
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select ARCH_ENABLE_MEMORY_HOTREMOVE |
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select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 |
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select ARCH_HAS_DEBUG_VM_PGTABLE |
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select ARCH_HAS_DEBUG_WX |
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select ARCH_HAS_DEVMEM_IS_ALLOWED |
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select ARCH_HAS_ELF_RANDOMIZE |
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select ARCH_HAS_FORCE_DMA_UNENCRYPTED |
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select ARCH_HAS_FORTIFY_SOURCE |
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select ARCH_HAS_GCOV_PROFILE_ALL |
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select ARCH_HAS_GIGANTIC_PAGE |
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select ARCH_HAS_KCOV |
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select ARCH_HAS_MEM_ENCRYPT |
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select ARCH_HAS_PTE_SPECIAL |
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select ARCH_HAS_SCALED_CPUTIME |
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select ARCH_HAS_SET_MEMORY |
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select ARCH_HAS_STRICT_KERNEL_RWX |
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select ARCH_HAS_STRICT_MODULE_RWX |
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select ARCH_HAS_SYSCALL_WRAPPER |
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select ARCH_HAS_UBSAN_SANITIZE_ALL |
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select ARCH_HAS_VDSO_DATA |
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select ARCH_HAVE_NMI_SAFE_CMPXCHG |
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select ARCH_INLINE_READ_LOCK |
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select ARCH_INLINE_READ_LOCK_BH |
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select ARCH_INLINE_READ_LOCK_IRQ |
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select ARCH_INLINE_READ_LOCK_IRQSAVE |
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select ARCH_INLINE_READ_TRYLOCK |
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select ARCH_INLINE_READ_UNLOCK |
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select ARCH_INLINE_READ_UNLOCK_BH |
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select ARCH_INLINE_READ_UNLOCK_IRQ |
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select ARCH_INLINE_READ_UNLOCK_IRQRESTORE |
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select ARCH_INLINE_SPIN_LOCK |
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select ARCH_INLINE_SPIN_LOCK_BH |
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select ARCH_INLINE_SPIN_LOCK_IRQ |
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select ARCH_INLINE_SPIN_LOCK_IRQSAVE |
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select ARCH_INLINE_SPIN_TRYLOCK |
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select ARCH_INLINE_SPIN_TRYLOCK_BH |
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select ARCH_INLINE_SPIN_UNLOCK |
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select ARCH_INLINE_SPIN_UNLOCK_BH |
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select ARCH_INLINE_SPIN_UNLOCK_IRQ |
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select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE |
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select ARCH_INLINE_WRITE_LOCK |
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select ARCH_INLINE_WRITE_LOCK_BH |
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select ARCH_INLINE_WRITE_LOCK_IRQ |
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select ARCH_INLINE_WRITE_LOCK_IRQSAVE |
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select ARCH_INLINE_WRITE_TRYLOCK |
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select ARCH_INLINE_WRITE_UNLOCK |
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select ARCH_INLINE_WRITE_UNLOCK_BH |
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select ARCH_INLINE_WRITE_UNLOCK_IRQ |
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select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE |
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select ARCH_STACKWALK |
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select ARCH_SUPPORTS_ATOMIC_RMW |
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select ARCH_SUPPORTS_DEBUG_PAGEALLOC |
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select ARCH_SUPPORTS_HUGETLBFS |
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select ARCH_SUPPORTS_NUMA_BALANCING |
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select ARCH_USE_BUILTIN_BSWAP |
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select ARCH_USE_CMPXCHG_LOCKREF |
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select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
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select ARCH_WANTS_NO_INSTR |
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select ARCH_WANT_DEFAULT_BPF_JIT |
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select ARCH_WANT_IPC_PARSE_VERSION |
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select BUILDTIME_TABLE_SORT |
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select CLONE_BACKWARDS2 |
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select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
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select DMA_OPS if PCI |
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select DYNAMIC_FTRACE if FUNCTION_TRACER |
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select GENERIC_ALLOCATOR |
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select GENERIC_CPU_AUTOPROBE |
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select GENERIC_CPU_VULNERABILITIES |
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select GENERIC_ENTRY |
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select GENERIC_FIND_FIRST_BIT |
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select GENERIC_GETTIMEOFDAY |
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select GENERIC_PTDUMP |
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select GENERIC_SMP_IDLE_THREAD |
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select GENERIC_TIME_VSYSCALL |
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select GENERIC_VDSO_TIME_NS |
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select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
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select HAVE_ARCH_AUDITSYSCALL |
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select HAVE_ARCH_JUMP_LABEL |
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select HAVE_ARCH_JUMP_LABEL_RELATIVE |
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select HAVE_ARCH_KASAN |
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select HAVE_ARCH_KASAN_VMALLOC |
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select HAVE_ARCH_KCSAN |
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select HAVE_ARCH_KFENCE |
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select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET |
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select HAVE_ARCH_SECCOMP_FILTER |
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select HAVE_ARCH_SOFT_DIRTY |
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select HAVE_ARCH_TRACEHOOK |
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select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
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select HAVE_ARCH_VMAP_STACK |
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select HAVE_ASM_MODVERSIONS |
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select HAVE_CMPXCHG_DOUBLE |
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select HAVE_CMPXCHG_LOCAL |
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select HAVE_DEBUG_KMEMLEAK |
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select HAVE_DMA_CONTIGUOUS |
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select HAVE_DYNAMIC_FTRACE |
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select HAVE_DYNAMIC_FTRACE_WITH_REGS |
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select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
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select HAVE_EFFICIENT_UNALIGNED_ACCESS |
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select HAVE_FAST_GUP |
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select HAVE_FENTRY |
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select HAVE_FTRACE_MCOUNT_RECORD |
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select HAVE_FUNCTION_ERROR_INJECTION |
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select HAVE_FUNCTION_GRAPH_TRACER |
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select HAVE_FUNCTION_TRACER |
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select HAVE_FUTEX_CMPXCHG if FUTEX |
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select HAVE_GCC_PLUGINS |
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select HAVE_GENERIC_VDSO |
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select HAVE_IOREMAP_PROT if PCI |
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select HAVE_KERNEL_BZIP2 |
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select HAVE_KERNEL_GZIP |
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select HAVE_KERNEL_LZ4 |
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select HAVE_KERNEL_LZMA |
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select HAVE_KERNEL_LZO |
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select HAVE_KERNEL_UNCOMPRESSED |
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select HAVE_KERNEL_XZ |
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select HAVE_KERNEL_ZSTD |
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select HAVE_KPROBES |
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select HAVE_KPROBES_ON_FTRACE |
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select HAVE_KRETPROBES |
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select HAVE_KVM |
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select HAVE_LIVEPATCH |
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select HAVE_MEMBLOCK_PHYS_MAP |
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select HAVE_MOD_ARCH_SPECIFIC |
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select HAVE_NMI |
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select HAVE_NOP_MCOUNT |
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select HAVE_PCI |
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select HAVE_PERF_EVENTS |
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select HAVE_PERF_REGS |
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select HAVE_PERF_USER_STACK_DUMP |
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select HAVE_REGS_AND_STACK_ACCESS_API |
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select HAVE_RELIABLE_STACKTRACE |
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select HAVE_RSEQ |
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select HAVE_SOFTIRQ_ON_OWN_STACK |
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select HAVE_SYSCALL_TRACEPOINTS |
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select HAVE_VIRT_CPU_ACCOUNTING |
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select HAVE_VIRT_CPU_ACCOUNTING_IDLE |
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select IOMMU_HELPER if PCI |
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select IOMMU_SUPPORT if PCI |
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select MMU_GATHER_NO_GATHER |
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select MMU_GATHER_RCU_TABLE_FREE |
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select MODULES_USE_ELF_RELA |
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select NEED_DMA_MAP_STATE if PCI |
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select NEED_SG_DMA_LENGTH if PCI |
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select OLD_SIGACTION |
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select OLD_SIGSUSPEND3 |
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select PCI_DOMAINS if PCI |
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select PCI_MSI if PCI |
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select PCI_MSI_ARCH_FALLBACKS if PCI_MSI |
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select SPARSE_IRQ |
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select SWIOTLB |
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select SYSCTL_EXCEPTION_TRACE |
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select THREAD_INFO_IN_TASK |
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select TRACE_IRQFLAGS_SUPPORT |
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select TTY |
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select VIRT_CPU_ACCOUNTING |
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select ZONE_DMA |
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# Note: keep the above list sorted alphabetically |
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config SCHED_OMIT_FRAME_POINTER |
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def_bool y |
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config PGTABLE_LEVELS |
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int |
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default 5 |
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source "kernel/livepatch/Kconfig" |
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menu "Processor type and features" |
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config HAVE_MARCH_Z900_FEATURES |
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def_bool n |
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config HAVE_MARCH_Z990_FEATURES |
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def_bool n |
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select HAVE_MARCH_Z900_FEATURES |
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config HAVE_MARCH_Z9_109_FEATURES |
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def_bool n |
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select HAVE_MARCH_Z990_FEATURES |
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config HAVE_MARCH_Z10_FEATURES |
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def_bool n |
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select HAVE_MARCH_Z9_109_FEATURES |
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config HAVE_MARCH_Z196_FEATURES |
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def_bool n |
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select HAVE_MARCH_Z10_FEATURES |
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config HAVE_MARCH_ZEC12_FEATURES |
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def_bool n |
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select HAVE_MARCH_Z196_FEATURES |
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config HAVE_MARCH_Z13_FEATURES |
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def_bool n |
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select HAVE_MARCH_ZEC12_FEATURES |
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config HAVE_MARCH_Z14_FEATURES |
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def_bool n |
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select HAVE_MARCH_Z13_FEATURES |
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config HAVE_MARCH_Z15_FEATURES |
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def_bool n |
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select HAVE_MARCH_Z14_FEATURES |
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choice |
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prompt "Processor type" |
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default MARCH_Z196 |
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config MARCH_Z900 |
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bool "IBM zSeries model z800 and z900" |
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select HAVE_MARCH_Z900_FEATURES |
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depends on $(cc-option,-march=z900) |
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help |
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Select this to enable optimizations for model z800/z900 (2064 and |
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2066 series). This will enable some optimizations that are not |
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available on older ESA/390 (31 Bit) only CPUs. |
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config MARCH_Z990 |
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bool "IBM zSeries model z890 and z990" |
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select HAVE_MARCH_Z990_FEATURES |
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depends on $(cc-option,-march=z990) |
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help |
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Select this to enable optimizations for model z890/z990 (2084 and |
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2086 series). The kernel will be slightly faster but will not work |
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on older machines. |
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config MARCH_Z9_109 |
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bool "IBM System z9" |
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select HAVE_MARCH_Z9_109_FEATURES |
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depends on $(cc-option,-march=z9-109) |
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help |
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Select this to enable optimizations for IBM System z9 (2094 and |
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2096 series). The kernel will be slightly faster but will not work |
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on older machines. |
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config MARCH_Z10 |
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bool "IBM System z10" |
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select HAVE_MARCH_Z10_FEATURES |
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depends on $(cc-option,-march=z10) |
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help |
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Select this to enable optimizations for IBM System z10 (2097 and |
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2098 series). The kernel will be slightly faster but will not work |
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on older machines. |
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config MARCH_Z196 |
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bool "IBM zEnterprise 114 and 196" |
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select HAVE_MARCH_Z196_FEATURES |
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depends on $(cc-option,-march=z196) |
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help |
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Select this to enable optimizations for IBM zEnterprise 114 and 196 |
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(2818 and 2817 series). The kernel will be slightly faster but will |
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not work on older machines. |
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config MARCH_ZEC12 |
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bool "IBM zBC12 and zEC12" |
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select HAVE_MARCH_ZEC12_FEATURES |
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depends on $(cc-option,-march=zEC12) |
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help |
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Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
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2827 series). The kernel will be slightly faster but will not work on |
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older machines. |
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config MARCH_Z13 |
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bool "IBM z13s and z13" |
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select HAVE_MARCH_Z13_FEATURES |
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depends on $(cc-option,-march=z13) |
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help |
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Select this to enable optimizations for IBM z13s and z13 (2965 and |
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2964 series). The kernel will be slightly faster but will not work on |
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older machines. |
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config MARCH_Z14 |
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bool "IBM z14 ZR1 and z14" |
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select HAVE_MARCH_Z14_FEATURES |
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depends on $(cc-option,-march=z14) |
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help |
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Select this to enable optimizations for IBM z14 ZR1 and z14 (3907 |
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and 3906 series). The kernel will be slightly faster but will not |
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work on older machines. |
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config MARCH_Z15 |
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bool "IBM z15" |
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select HAVE_MARCH_Z15_FEATURES |
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depends on $(cc-option,-march=z15) |
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help |
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Select this to enable optimizations for IBM z15 (8562 |
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and 8561 series). The kernel will be slightly faster but will not |
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work on older machines. |
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endchoice |
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config MARCH_Z900_TUNE |
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def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT |
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config MARCH_Z990_TUNE |
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def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT |
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config MARCH_Z9_109_TUNE |
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def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT |
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config MARCH_Z10_TUNE |
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def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT |
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config MARCH_Z196_TUNE |
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def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT |
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config MARCH_ZEC12_TUNE |
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def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT |
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config MARCH_Z13_TUNE |
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def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT |
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config MARCH_Z14_TUNE |
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def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT |
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config MARCH_Z15_TUNE |
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def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT |
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choice |
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prompt "Tune code generation" |
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default TUNE_DEFAULT |
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help |
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Cause the compiler to tune (-mtune) the generated code for a machine. |
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This will make the code run faster on the selected machine but |
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somewhat slower on other machines. |
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This option only changes how the compiler emits instructions, not the |
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selection of instructions itself, so the resulting kernel will run on |
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all other machines. |
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config TUNE_DEFAULT |
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bool "Default" |
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help |
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Tune the generated code for the target processor for which the kernel |
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will be compiled. |
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config TUNE_Z900 |
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bool "IBM zSeries model z800 and z900" |
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depends on $(cc-option,-mtune=z900) |
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config TUNE_Z990 |
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bool "IBM zSeries model z890 and z990" |
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depends on $(cc-option,-mtune=z990) |
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config TUNE_Z9_109 |
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bool "IBM System z9" |
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depends on $(cc-option,-mtune=z9-109) |
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config TUNE_Z10 |
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bool "IBM System z10" |
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depends on $(cc-option,-mtune=z10) |
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config TUNE_Z196 |
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bool "IBM zEnterprise 114 and 196" |
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depends on $(cc-option,-mtune=z196) |
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config TUNE_ZEC12 |
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bool "IBM zBC12 and zEC12" |
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depends on $(cc-option,-mtune=zEC12) |
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config TUNE_Z13 |
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bool "IBM z13s and z13" |
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depends on $(cc-option,-mtune=z13) |
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config TUNE_Z14 |
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bool "IBM z14 ZR1 and z14" |
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depends on $(cc-option,-mtune=z14) |
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config TUNE_Z15 |
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bool "IBM z15" |
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depends on $(cc-option,-mtune=z15) |
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endchoice |
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config 64BIT |
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def_bool y |
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config COMPAT |
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def_bool y |
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prompt "Kernel support for 31 bit emulation" |
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select ARCH_WANT_OLD_COMPAT_IPC |
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select COMPAT_OLD_SIGACTION |
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select HAVE_UID16 |
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depends on MULTIUSER |
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depends on !CC_IS_CLANG |
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help |
|
Select this option if you want to enable your system kernel to |
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handle system-calls from ELF binaries for 31 bit ESA. This option |
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(and some other stuff like libraries and such) is needed for |
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executing 31 bit applications. It is safe to say "Y". |
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config SYSVIPC_COMPAT |
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def_bool y if COMPAT && SYSVIPC |
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config SMP |
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def_bool y |
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config NR_CPUS |
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int "Maximum number of CPUs (2-512)" |
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range 2 512 |
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default "64" |
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help |
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This allows you to specify the maximum number of CPUs which this |
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kernel will support. The maximum supported value is 512 and the |
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minimum value which makes sense is 2. |
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|
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This is purely to save memory - each supported CPU adds |
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approximately sixteen kilobytes to the kernel image. |
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|
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config HOTPLUG_CPU |
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def_bool y |
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|
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config NUMA |
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bool "NUMA support" |
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depends on SCHED_TOPOLOGY |
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default n |
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help |
|
Enable NUMA support |
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|
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This option adds NUMA support to the kernel. |
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|
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config NODES_SHIFT |
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int |
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depends on NUMA |
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default "1" |
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config SCHED_SMT |
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def_bool n |
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config SCHED_MC |
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def_bool n |
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config SCHED_BOOK |
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def_bool n |
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|
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config SCHED_DRAWER |
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def_bool n |
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config SCHED_TOPOLOGY |
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def_bool y |
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prompt "Topology scheduler support" |
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select SCHED_SMT |
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select SCHED_MC |
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select SCHED_BOOK |
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select SCHED_DRAWER |
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help |
|
Topology scheduler support improves the CPU scheduler's decision |
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making when dealing with machines that have multi-threading, |
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multiple cores or multiple books. |
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|
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source "kernel/Kconfig.hz" |
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|
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config KEXEC |
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def_bool y |
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select KEXEC_CORE |
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|
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config KEXEC_FILE |
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bool "kexec file based system call" |
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select KEXEC_CORE |
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select BUILD_BIN2C |
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depends on CRYPTO |
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depends on CRYPTO_SHA256 |
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depends on CRYPTO_SHA256_S390 |
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help |
|
Enable the kexec file based system call. In contrast to the normal |
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kexec system call this system call takes file descriptors for the |
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kernel and initramfs as arguments. |
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|
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config ARCH_HAS_KEXEC_PURGATORY |
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def_bool y |
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depends on KEXEC_FILE |
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|
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config KEXEC_SIG |
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bool "Verify kernel signature during kexec_file_load() syscall" |
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depends on KEXEC_FILE && MODULE_SIG_FORMAT |
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help |
|
This option makes kernel signature verification mandatory for |
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the kexec_file_load() syscall. |
|
|
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In addition to that option, you need to enable signature |
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verification for the corresponding kernel image type being |
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loaded in order for this to work. |
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|
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config ARCH_RANDOM |
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def_bool y |
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prompt "s390 architectural random number generation API" |
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help |
|
Enable the s390 architectural random number generation API |
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to provide random data for all consumers within the Linux |
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kernel. |
|
|
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When enabled the arch_random_* functions declared in linux/random.h |
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are implemented. The implementation is based on the s390 CPACF |
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instruction subfunction TRNG which provides a real true random |
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number generator. |
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|
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If unsure, say Y. |
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|
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config KERNEL_NOBP |
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def_bool n |
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prompt "Enable modified branch prediction for the kernel by default" |
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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 |
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regard to speculative execution. |
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|
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With the option enabled the kernel parameter "nobp=0" or "nospec" |
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can be used to run the kernel in the normal branch prediction mode. |
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|
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With the option disabled the modified branch prediction mode is |
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enabled with the "nobp=1" kernel parameter. |
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|
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If unsure, say N. |
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|
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config EXPOLINE |
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def_bool n |
|
prompt "Avoid speculative indirect branches in the kernel" |
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help |
|
Compile the kernel with the expoline compiler options to guard |
|
against kernel-to-user data leaks by avoiding speculative indirect |
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branches. |
|
Requires a compiler with -mindirect-branch=thunk support for full |
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protection. The kernel may run slower. |
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|
|
If unsure, say N. |
|
|
|
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 |
|
bool "Build a relocatable kernel" |
|
select MODULE_REL_CRCS if MODVERSIONS |
|
default y |
|
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. |
|
|
|
config RANDOMIZE_BASE |
|
bool "Randomize the address of the kernel image (KASLR)" |
|
depends on RELOCATABLE |
|
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. |
|
|
|
endmenu |
|
|
|
menu "Memory setup" |
|
|
|
config ARCH_SPARSEMEM_ENABLE |
|
def_bool y |
|
select SPARSEMEM_VMEMMAP_ENABLE |
|
select SPARSEMEM_VMEMMAP |
|
|
|
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. |
|
|
|
config PACK_STACK |
|
def_bool y |
|
prompt "Pack kernel stack" |
|
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. |
|
|
|
Say Y if you are unsure. |
|
|
|
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" |
|
|
|
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 VFIO_CCW |
|
def_tristate n |
|
prompt "Support for VFIO-CCW subchannels" |
|
depends on S390_CCW_IOMMU && 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 S390_AP_IOMMU && VFIO_MDEV && KVM |
|
depends on ZCRYPT |
|
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 |
|
|
|
menu "Dump support" |
|
|
|
config CRASH_DUMP |
|
bool "kernel crash dumps" |
|
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. |
|
Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this. |
|
This option also enables s390 zfcpdump. |
|
See also <file:Documentation/s390/zfcpdump.rst> |
|
|
|
endmenu |
|
|
|
config CCW |
|
def_bool y |
|
|
|
config HAVE_PNETID |
|
tristate |
|
default (SMC || CCWGROUP) |
|
|
|
menu "Virtualization" |
|
|
|
config PROTECTED_VIRTUALIZATION_GUEST |
|
def_bool n |
|
prompt "Protected virtualization guest support" |
|
select ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS |
|
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" |
|
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 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 |
|
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_FS |
|
def_bool y |
|
prompt "s390 hypervisor file system support" |
|
select SYS_HYPERVISOR |
|
help |
|
This is a virtual file system intended to provide accounting |
|
information in an s390 hypervisor environment. |
|
|
|
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 |
|
|
|
menu "Selftests" |
|
|
|
config S390_UNWIND_SELFTEST |
|
def_tristate n |
|
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. |
|
|
|
endmenu
|
|
|