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934 lines
24 KiB
934 lines
24 KiB
config MMU |
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def_bool y |
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config ZONE_DMA |
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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 RWSEM_GENERIC_SPINLOCK |
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bool |
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config RWSEM_XCHGADD_ALGORITHM |
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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 ARCH_DMA_ADDR_T_64BIT |
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def_bool y |
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config GENERIC_LOCKBREAK |
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def_bool y if SMP && PREEMPT |
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config PGSTE |
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def_bool y if KVM |
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config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
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def_bool y |
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config KEXEC |
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def_bool y |
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select KEXEC_CORE |
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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 DEBUG_RODATA |
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def_bool y |
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config S390 |
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def_bool y |
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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_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_SG_CHAIN |
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select ARCH_HAS_UBSAN_SANITIZE_ALL |
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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_SAVE_PAGE_KEYS if HIBERNATION |
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select ARCH_SUPPORTS_ATOMIC_RMW |
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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_PROT_NUMA_PROT_NONE |
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select ARCH_WANTS_UBSAN_NO_NULL |
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select ARCH_WANT_IPC_PARSE_VERSION |
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select BUILDTIME_EXTABLE_SORT |
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select CLONE_BACKWARDS2 |
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select DYNAMIC_FTRACE if FUNCTION_TRACER |
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select GENERIC_CLOCKEVENTS |
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select GENERIC_CPU_AUTOPROBE |
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select GENERIC_CPU_DEVICES if !SMP |
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select GENERIC_CPU_VULNERABILITIES |
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select GENERIC_FIND_FIRST_BIT |
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select GENERIC_SMP_IDLE_THREAD |
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select GENERIC_TIME_VSYSCALL |
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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_EARLY_PFN_TO_NID |
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select HAVE_ARCH_HARDENED_USERCOPY |
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select HAVE_ARCH_JUMP_LABEL |
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select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
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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_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
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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_API_DEBUG |
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select HAVE_DYNAMIC_FTRACE |
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select HAVE_DYNAMIC_FTRACE_WITH_REGS |
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select HAVE_EFFICIENT_UNALIGNED_ACCESS |
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select HAVE_EXIT_THREAD |
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select HAVE_FTRACE_MCOUNT_RECORD |
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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_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_XZ |
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select HAVE_KPROBES |
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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 |
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select HAVE_MEMBLOCK_NODE_MAP |
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select HAVE_MEMBLOCK_PHYS_MAP |
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select HAVE_MOD_ARCH_SPECIFIC |
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select HAVE_OPROFILE |
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select HAVE_PERF_EVENTS |
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select HAVE_REGS_AND_STACK_ACCESS_API |
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select HAVE_SYSCALL_TRACEPOINTS |
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select HAVE_VIRT_CPU_ACCOUNTING |
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select MODULES_USE_ELF_RELA |
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select NO_BOOTMEM |
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select OLD_SIGACTION |
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select OLD_SIGSUSPEND3 |
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select SPARSE_IRQ |
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select SYSCTL_EXCEPTION_TRACE |
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select TTY |
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select VIRT_CPU_ACCOUNTING |
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select VIRT_TO_BUS |
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select HAVE_NMI |
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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 4 |
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source "init/Kconfig" |
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source "kernel/Kconfig.freezer" |
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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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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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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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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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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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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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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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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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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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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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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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config TUNE_Z990 |
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bool "IBM zSeries model z890 and z990" |
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config TUNE_Z9_109 |
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bool "IBM System z9" |
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config TUNE_Z10 |
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bool "IBM System z10" |
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config TUNE_Z196 |
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bool "IBM zEnterprise 114 and 196" |
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config TUNE_ZEC12 |
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bool "IBM zBC12 and zEC12" |
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config TUNE_Z13 |
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bool "IBM z13" |
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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 COMPAT_BINFMT_ELF if BINFMT_ELF |
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select ARCH_WANT_OLD_COMPAT_IPC |
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select COMPAT_OLD_SIGACTION |
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depends on MULTIUSER |
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help |
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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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prompt "Symmetric multi-processing support" |
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---help--- |
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This enables support for systems with more than one CPU. If you have |
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a system with only one CPU, like most personal computers, say N. If |
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you have a system with more than one CPU, say Y. |
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If you say N here, the kernel will run on uni- and multiprocessor |
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machines, but will use only one CPU of a multiprocessor machine. If |
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you say Y here, the kernel will run on many, but not all, |
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uniprocessor machines. On a uniprocessor machine, the kernel |
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will run faster if you say N here. |
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|
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See also the SMP-HOWTO available at |
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<http://www.tldp.org/docs.html#howto>. |
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Even if you don't know what to do here, say 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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depends on SMP |
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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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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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config HOTPLUG_CPU |
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def_bool y |
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prompt "Support for hot-pluggable CPUs" |
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depends on SMP |
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help |
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Say Y here to be able to turn CPUs off and on. CPUs |
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can be controlled through /sys/devices/system/cpu/cpu#. |
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Say N if you want to disable CPU hotplug. |
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# Some NUMA nodes have memory ranges that span |
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# other nodes. Even though a pfn is valid and |
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# between a node's start and end pfns, it may not |
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# reside on that node. See memmap_init_zone() |
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# for details. <- They meant memory holes! |
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config NODES_SPAN_OTHER_NODES |
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def_bool NUMA |
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config NUMA |
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bool "NUMA support" |
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depends on SMP && SCHED_TOPOLOGY |
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default n |
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help |
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Enable NUMA support |
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This option adds NUMA support to the kernel. |
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An operation mode can be selected by appending |
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numa=<method> to the kernel command line. |
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The default behaviour is identical to appending numa=plain to |
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the command line. This will create just one node with all |
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available memory and all CPUs in it. |
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config NODES_SHIFT |
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int "Maximum NUMA nodes (as a power of 2)" |
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range 1 10 |
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depends on NUMA |
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default "4" |
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help |
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Specify the maximum number of NUMA nodes available on the target |
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system. Increases memory reserved to accommodate various tables. |
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|
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menu "Select NUMA modes" |
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depends on NUMA |
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config NUMA_EMU |
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bool "NUMA emulation" |
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default y |
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help |
|
Numa emulation mode will split the available system memory into |
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equal chunks which then are distributed over the configured number |
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of nodes in a round-robin manner. |
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|
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The number of fake nodes is limited by the number of available memory |
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chunks (i.e. memory size / fake size) and the number of supported |
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nodes in the kernel. |
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|
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The CPUs are assigned to the nodes in a way that partially respects |
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the original machine topology (if supported by the machine). |
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Fair distribution of the CPUs is not guaranteed. |
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|
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config EMU_SIZE |
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hex "NUMA emulation memory chunk size" |
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default 0x10000000 |
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range 0x400000 0x100000000 |
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depends on NUMA_EMU |
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help |
|
Select the default size by which the memory is chopped and then |
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assigned to emulated NUMA nodes. |
|
|
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This can be overridden by specifying |
|
|
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emu_size=<n> |
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|
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on the kernel command line where also suffixes K, M, G, and T are |
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supported. |
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endmenu |
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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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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" |
|
depends on SMP |
|
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 |
|
making when dealing with machines that have multi-threading, |
|
multiple cores or multiple books. |
|
|
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source kernel/Kconfig.preempt |
|
|
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source kernel/Kconfig.hz |
|
|
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endmenu |
|
|
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menu "Memory setup" |
|
|
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config ARCH_SPARSEMEM_ENABLE |
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def_bool y |
|
select SPARSEMEM_VMEMMAP_ENABLE |
|
select SPARSEMEM_VMEMMAP |
|
|
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config ARCH_SPARSEMEM_DEFAULT |
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def_bool y |
|
|
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config ARCH_SELECT_MEMORY_MODEL |
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def_bool y |
|
|
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config ARCH_ENABLE_MEMORY_HOTPLUG |
|
def_bool y if SPARSEMEM |
|
|
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config ARCH_ENABLE_MEMORY_HOTREMOVE |
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def_bool y |
|
|
|
config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
|
def_bool y |
|
|
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config FORCE_MAX_ZONEORDER |
|
int |
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default "9" |
|
|
|
source "mm/Kconfig" |
|
|
|
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 |
|
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. |
|
|
|
config WARN_DYNAMIC_STACK |
|
def_bool n |
|
prompt "Emit compiler warnings for function with dynamic stack usage" |
|
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. |
|
|
|
Say N if you are unsure. |
|
|
|
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. |
|
|
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menuconfig PCI |
|
bool "PCI support" |
|
select PCI_MSI |
|
select IOMMU_SUPPORT |
|
help |
|
Enable PCI support. |
|
|
|
if PCI |
|
|
|
config PCI_NR_FUNCTIONS |
|
int "Maximum number of PCI functions (1-4096)" |
|
range 1 4096 |
|
default "64" |
|
help |
|
This allows you to specify the maximum number of PCI functions which |
|
this kernel will support. |
|
|
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source "drivers/pci/Kconfig" |
|
|
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endif # PCI |
|
|
|
config PCI_DOMAINS |
|
def_bool PCI |
|
|
|
config HAS_IOMEM |
|
def_bool PCI |
|
|
|
config IOMMU_HELPER |
|
def_bool PCI |
|
|
|
config NEED_SG_DMA_LENGTH |
|
def_bool PCI |
|
|
|
config NEED_DMA_MAP_STATE |
|
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. |
|
|
|
endmenu |
|
|
|
menu "Dump support" |
|
|
|
config CRASH_DUMP |
|
bool "kernel crash dumps" |
|
depends on 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. |
|
Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
|
This option also enables s390 zfcpdump. |
|
See also <file:Documentation/s390/zfcpdump.txt> |
|
|
|
endmenu |
|
|
|
menu "Executable file formats / Emulations" |
|
|
|
source "fs/Kconfig.binfmt" |
|
|
|
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. |
|
|
|
config KERNEL_NOBP |
|
def_bool n |
|
prompt "Enable modified branch prediction for the kernel by default" |
|
help |
|
If this option is selected the kernel will switch to a modified |
|
branch prediction mode if the firmware interface is available. |
|
The modified branch prediction mode improves the behaviour in |
|
regard to speculative execution. |
|
|
|
With the option enabled the kernel parameter "nobp=0" or "nospec" |
|
can be used to run the kernel in the normal branch prediction mode. |
|
|
|
With the option disabled the modified branch prediction mode is |
|
enabled with the "nobp=1" kernel parameter. |
|
|
|
If unsure, say N. |
|
|
|
config EXPOLINE |
|
def_bool n |
|
prompt "Avoid speculative indirect branches in the kernel" |
|
help |
|
Compile the kernel with the expoline compiler options to guard |
|
against kernel-to-user data leaks by avoiding speculative indirect |
|
branches. |
|
Requires a compiler with -mindirect-branch=thunk support for full |
|
protection. The kernel may run slower. |
|
|
|
If unsure, say N. |
|
|
|
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 |
|
|
|
endmenu |
|
|
|
menu "Power Management" |
|
|
|
config ARCH_HIBERNATION_POSSIBLE |
|
def_bool y |
|
|
|
source "kernel/power/Kconfig" |
|
|
|
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" |
|
|
|
menu "Virtualization" |
|
|
|
config PFAULT |
|
def_bool y |
|
prompt "Pseudo page fault support" |
|
help |
|
Select this option, if you want to use PFAULT pseudo page fault |
|
handling under VM. If running native or in LPAR, this option |
|
has no effect. If your VM does not support PFAULT, PAGEEX |
|
pseudo page fault handling will be used. |
|
Note that VM 4.2 supports PFAULT but has a bug in its |
|
implementation that causes some problems. |
|
Everybody who wants to run Linux under VM != VM4.2 should select |
|
this option. |
|
|
|
config SHARED_KERNEL |
|
bool "VM shared kernel support" |
|
depends on !JUMP_LABEL |
|
depends on !ALTERNATIVES |
|
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" |
|
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_FS |
|
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 |
|
select VIRTIO_CONSOLE |
|
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. |
|
|
|
config S390_GUEST_OLD_TRANSPORT |
|
def_bool y |
|
prompt "Guest support for old s390 virtio transport (DEPRECATED)" |
|
depends on S390_GUEST |
|
help |
|
Enable this option to add support for the old s390-virtio |
|
transport (i.e. virtio devices NOT based on virtio-ccw). This |
|
type of virtio devices is only available on the experimental |
|
kuli userspace or with old (< 2.6) qemu. If you are running |
|
with a modern version of qemu (which supports virtio-ccw since |
|
1.4 and uses it by default since version 2.4), you probably won't |
|
need this. |
|
|
|
endmenu
|
|
|