diff options
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 43 |
1 files changed, 17 insertions, 26 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index ae55e715cc74..863a62a6de3c 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -68,6 +68,7 @@ config S390 select ARCH_BINFMT_ELF_STATE select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ELF_RANDOMIZE + select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA select ARCH_HAS_KCOV @@ -143,7 +144,6 @@ config S390 select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS select HAVE_EFFICIENT_UNALIGNED_ACCESS - select HAVE_EXIT_THREAD select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER @@ -538,6 +538,22 @@ config ARCH_RANDOM If unsure, say Y. +config ALTERNATIVES + def_bool y + prompt "Patch optimized instructions for running CPU type" + help + When enabled the kernel code is compiled with additional + alternative instructions blocks optimized for newer CPU types. + These alternative instructions blocks are patched at kernel boot + time when running CPU supports them. This mechanism is used to + optimize some critical code paths (i.e. spinlocks) for newer CPUs + even if kernel is build to support older machine generations. + + This mechanism could be disabled by appending "noaltinstr" + option to the kernel command line. + + If unsure, say Y. + endmenu menu "Memory setup" @@ -809,18 +825,6 @@ config PFAULT Everybody who wants to run Linux under VM != VM4.2 should select this option. -config SHARED_KERNEL - bool "VM shared kernel support" - depends on !JUMP_LABEL - help - Select this option, if you want to share the text segment of the - Linux kernel between different VM guests. This reduces memory - usage with lots of guests but greatly increases kernel size. - Also if a kernel was IPL'ed from a shared segment the kexec system - call will not work. - You should only select this option if you know what you are - doing and want to exploit this feature. - config CMM def_tristate n prompt "Cooperative memory management" @@ -930,17 +934,4 @@ config S390_GUEST 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 |