626 lines
17 KiB
Plaintext
626 lines
17 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.txt.
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#
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config SCHED_MC
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def_bool y
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depends on SMP
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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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depends on 64BIT
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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 HAVE_LATENCYTOP_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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bool
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default n
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config ARCH_HAS_ILOG2_U64
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bool
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default n
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config GENERIC_HWEIGHT
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def_bool y
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config GENERIC_TIME
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def_bool y
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config GENERIC_TIME_VSYSCALL
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def_bool y
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config GENERIC_CLOCKEVENTS
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def_bool y
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config GENERIC_BUG
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bool
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depends on BUG
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default y
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config NO_IOMEM
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def_bool y
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config NO_DMA
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def_bool y
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config GENERIC_LOCKBREAK
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bool
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default y
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depends on SMP && PREEMPT
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config PGSTE
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bool
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default y if KVM
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config VIRT_CPU_ACCOUNTING
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def_bool y
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config ARCH_SUPPORTS_DEBUG_PAGEALLOC
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def_bool y
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mainmenu "Linux Kernel Configuration"
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config S390
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def_bool y
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select USE_GENERIC_SMP_HELPERS if SMP
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select HAVE_SYSCALL_WRAPPERS
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select HAVE_FUNCTION_TRACER
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select HAVE_FUNCTION_TRACE_MCOUNT_TEST
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select HAVE_FTRACE_MCOUNT_RECORD
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select HAVE_SYSCALL_TRACEPOINTS
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select HAVE_DYNAMIC_FTRACE
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select HAVE_FUNCTION_GRAPH_TRACER
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select HAVE_DEFAULT_NO_SPIN_MUTEXES
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select HAVE_OPROFILE
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select HAVE_KPROBES
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select HAVE_KRETPROBES
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select HAVE_KVM if 64BIT
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select HAVE_ARCH_TRACEHOOK
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select INIT_ALL_POSSIBLE
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select HAVE_PERF_EVENTS
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config SCHED_OMIT_FRAME_POINTER
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bool
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default y
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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menu "Base setup"
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comment "Processor type and features"
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source "kernel/time/Kconfig"
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config 64BIT
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bool "64 bit kernel"
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help
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Select this option if you have a 64 bit IBM zSeries machine
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and want to use the 64 bit addressing mode.
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config 32BIT
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bool
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default y if !64BIT
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config KTIME_SCALAR
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def_bool 32BIT
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config SMP
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bool "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 single 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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singleprocessor machines. On a singleprocessor machine, the kernel
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will run faster if you say N here.
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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 (2-64)"
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range 2 64
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depends on SMP
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default "32" if !64BIT
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default "64" if 64BIT
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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 64 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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bool "Support for hot-pluggable CPUs"
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depends on SMP
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select HOTPLUG
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default n
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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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config MATHEMU
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bool "IEEE FPU emulation"
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depends on MARCH_G5
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help
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This option is required for IEEE compliant floating point arithmetic
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on older S/390 machines. Say Y unless you know your machine doesn't
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need this.
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config COMPAT
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bool "Kernel support for 31 bit emulation"
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depends on 64BIT
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select COMPAT_BINFMT_ELF
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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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bool
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depends on COMPAT && SYSVIPC
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default y
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config AUDIT_ARCH
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bool
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default y
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config S390_SWITCH_AMODE
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bool "Switch kernel/user addressing modes"
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help
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This option allows to switch the addressing modes of kernel and user
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space. The kernel parameter switch_amode=on will enable this feature,
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default is disabled. Enabling this (via kernel parameter) on machines
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earlier than IBM System z9-109 EC/BC will reduce system performance.
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Note that this option will also be selected by selecting the execute
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protection option below. Enabling the execute protection via the
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noexec kernel parameter will also switch the addressing modes,
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independent of the switch_amode kernel parameter.
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config S390_EXEC_PROTECT
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bool "Data execute protection"
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select S390_SWITCH_AMODE
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help
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This option allows to enable a buffer overflow protection for user
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space programs and it also selects the addressing mode option above.
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The kernel parameter noexec=on will enable this feature and also
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switch the addressing modes, default is disabled. Enabling this (via
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kernel parameter) on machines earlier than IBM System z9-109 EC/BC
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will reduce system performance.
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comment "Code generation options"
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choice
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prompt "Processor type"
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default MARCH_G5
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config MARCH_G5
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bool "S/390 model G5 and G6"
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depends on !64BIT
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help
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Select this to build a 31 bit kernel that works
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on all S/390 and zSeries machines.
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config MARCH_Z900
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bool "IBM eServer zSeries model z800 and z900"
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help
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Select this to optimize for zSeries machines. This
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will enable some optimizations that are not available
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on older 31 bit only CPUs.
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config MARCH_Z990
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bool "IBM eServer zSeries model z890 and z990"
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help
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Select this enable optimizations for model z890/z990.
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This will be slightly faster but does not work on
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older machines such as the z900.
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config MARCH_Z9_109
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bool "IBM System z9"
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help
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Select this to enable optimizations for IBM System z9-109, IBM
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System z9 Enterprise Class (z9 EC), and IBM System z9 Business
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Class (z9 BC). The kernel will be slightly faster but will not
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work on older machines such as the z990, z890, z900, and z800.
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config MARCH_Z10
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bool "IBM System z10"
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help
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Select this to enable optimizations for IBM System z10. The
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kernel will be slightly faster but will not work on older
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machines such as the z990, z890, z900, z800, z9-109, z9-ec
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and z9-bc.
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endchoice
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config PACK_STACK
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bool "Pack kernel stack"
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help
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This option enables the compiler option -mkernel-backchain if it
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is available. If the option is available the compiler supports
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the new stack layout which dramatically reduces the minimum stack
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frame size. With an old compiler a non-leaf function needs a
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minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
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-mkernel-backchain the minimum size drops to 16 byte on 31 bit
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and 24 byte on 64 bit.
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Say Y if you are unsure.
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config SMALL_STACK
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bool "Use 8kb for kernel stack instead of 16kb"
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depends on PACK_STACK && 64BIT && !LOCKDEP
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help
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If you say Y here and the compiler supports the -mkernel-backchain
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option the kernel will use a smaller kernel stack size. The reduced
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size is 8kb instead of 16kb. This allows to run more threads on a
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system and reduces the pressure on the memory management for higher
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order page allocations.
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Say N if you are unsure.
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config CHECK_STACK
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bool "Detect kernel stack overflow"
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help
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This option enables the compiler option -mstack-guard and
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-mstack-size if they are available. If the compiler supports them
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it will emit additional code to each function prolog to trigger
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an illegal operation if the kernel stack is about to overflow.
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Say N if you are unsure.
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config STACK_GUARD
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int "Size of the guard area (128-1024)"
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range 128 1024
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depends on CHECK_STACK
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default "256"
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help
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This allows you to specify the size of the guard area at the lower
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end of the kernel stack. If the kernel stack points into the guard
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area on function entry an illegal operation is triggered. The size
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needs to be a power of 2. Please keep in mind that the size of an
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interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
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The minimum size for the stack guard should be 256 for 31 bit and
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512 for 64 bit.
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config WARN_STACK
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bool "Emit compiler warnings for function with broken stack usage"
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help
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This option enables the compiler options -mwarn-framesize and
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-mwarn-dynamicstack. If the compiler supports these options it
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will generate warnings for function which either use alloca or
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create a stack frame bigger than CONFIG_WARN_STACK_SIZE.
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Say N if you are unsure.
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config WARN_STACK_SIZE
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int "Maximum frame size considered safe (128-2048)"
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range 128 2048
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depends on WARN_STACK
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default "2048"
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help
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This allows you to specify the maximum frame size a function may
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have without the compiler complaining about it.
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config ARCH_POPULATES_NODE_MAP
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def_bool y
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comment "Kernel preemption"
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source "kernel/Kconfig.preempt"
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config ARCH_SPARSEMEM_ENABLE
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def_bool y
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select SPARSEMEM_VMEMMAP_ENABLE
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select SPARSEMEM_VMEMMAP
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select SPARSEMEM_STATIC if !64BIT
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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
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def_bool y
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depends on SPARSEMEM
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config ARCH_ENABLE_MEMORY_HOTREMOVE
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def_bool y
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config ARCH_HIBERNATION_POSSIBLE
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def_bool y if 64BIT
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source "mm/Kconfig"
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comment "I/O subsystem configuration"
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config QDIO
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tristate "QDIO support"
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---help---
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This driver provides the Queued Direct I/O base support for
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IBM System z.
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To compile this driver as a module, choose M here: the
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module will be called qdio.
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If unsure, say Y.
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config CHSC_SCH
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tristate "Support for CHSC subchannels"
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help
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This driver allows usage of CHSC subchannels. A CHSC subchannel
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is usually present on LPAR only.
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The driver creates a device /dev/chsc, which may be used to
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obtain I/O configuration information about the machine and
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to issue asynchronous chsc commands (DANGEROUS).
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You will usually only want to use this interface on a special
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LPAR designated for system management.
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To compile this driver as a module, choose M here: the
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module will be called chsc_sch.
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If unsure, say N.
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comment "Misc"
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config IPL
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bool "Builtin IPL record support"
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help
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If you want to use the produced kernel to IPL directly from a
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device, you have to merge a bootsector specific to the device
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into the first bytes of the kernel. You will have to select the
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IPL device.
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choice
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prompt "IPL method generated into head.S"
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depends on IPL
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default IPL_VM
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help
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Select "tape" if you want to IPL the image from a Tape.
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Select "vm_reader" if you are running under VM/ESA and want
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to IPL the image from the emulated card reader.
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config IPL_TAPE
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bool "tape"
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config IPL_VM
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bool "vm_reader"
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endchoice
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source "fs/Kconfig.binfmt"
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config FORCE_MAX_ZONEORDER
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int
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default "9"
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config PROCESS_DEBUG
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bool "Show crashed user process info"
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help
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Say Y to print all process fault locations to the console. This is
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a debugging option; you probably do not want to set it unless you
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are an S390 port maintainer.
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config PFAULT
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bool "Pseudo page fault support"
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help
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Select this option, if you want to use PFAULT pseudo page fault
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handling under VM. If running native or in LPAR, this option
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has no effect. If your VM does not support PFAULT, PAGEEX
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pseudo page fault handling will be used.
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Note that VM 4.2 supports PFAULT but has a bug in its
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implementation that causes some problems.
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Everybody who wants to run Linux under VM != VM4.2 should select
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this option.
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config SHARED_KERNEL
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bool "VM shared kernel support"
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help
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Select this option, if you want to share the text segment of the
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Linux kernel between different VM guests. This reduces memory
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usage with lots of guests but greatly increases kernel size.
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Also if a kernel was IPL'ed from a shared segment the kexec system
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call will not work.
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You should only select this option if you know what you are
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doing and want to exploit this feature.
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config CMM
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tristate "Cooperative memory management"
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help
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Select this option, if you want to enable the kernel interface
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to reduce the memory size of the system. This is accomplished
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by allocating pages of memory and put them "on hold". This only
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makes sense for a system running under VM where the unused pages
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will be reused by VM for other guest systems. The interface
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allows an external monitor to balance memory of many systems.
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Everybody who wants to run Linux under VM should select this
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option.
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config CMM_PROC
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bool "/proc interface to cooperative memory management"
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depends on CMM
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help
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Select this option to enable the /proc interface to the
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cooperative memory management.
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config CMM_IUCV
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bool "IUCV special message interface to cooperative memory management"
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depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
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help
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Select this option to enable the special message interface to
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the cooperative memory management.
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config APPLDATA_BASE
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bool "Linux - VM Monitor Stream, base infrastructure"
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depends on PROC_FS
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help
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This provides a kernel interface for creating and updating z/VM APPLDATA
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monitor records. The monitor records are updated at certain time
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intervals, once the timer is started.
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Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
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i.e. enables or disables monitoring on the Linux side.
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A custom interval value (in seconds) can be written to
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/proc/appldata/interval.
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Defaults are 60 seconds interval and timer off.
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The /proc entries can also be read from, showing the current settings.
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config APPLDATA_MEM
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tristate "Monitor memory management statistics"
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depends on APPLDATA_BASE && VM_EVENT_COUNTERS
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help
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This provides memory management related data to the Linux - VM Monitor
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Stream, like paging/swapping rate, memory utilisation, etc.
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Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
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APPLDATA monitor record, i.e. enables or disables monitoring this record
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on the z/VM side.
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Default is disabled.
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The /proc entry can also be read from, showing the current settings.
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This can also be compiled as a module, which will be called
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appldata_mem.o.
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config APPLDATA_OS
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tristate "Monitor OS statistics"
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depends on APPLDATA_BASE
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help
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This provides OS related data to the Linux - VM Monitor Stream, like
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CPU utilisation, etc.
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Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
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APPLDATA monitor record, i.e. enables or disables monitoring this record
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on the z/VM side.
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Default is disabled.
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This can also be compiled as a module, which will be called
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appldata_os.o.
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config APPLDATA_NET_SUM
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tristate "Monitor overall network statistics"
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depends on APPLDATA_BASE && NET
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help
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This provides network related data to the Linux - VM Monitor Stream,
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currently there is only a total sum of network I/O statistics, no
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per-interface data.
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Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
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APPLDATA monitor record, i.e. enables or disables monitoring this record
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on the z/VM side.
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Default is disabled.
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This can also be compiled as a module, which will be called
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appldata_net_sum.o.
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source kernel/Kconfig.hz
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config S390_HYPFS_FS
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bool "s390 hypervisor file system support"
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select SYS_HYPERVISOR
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default y
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help
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This is a virtual file system intended to provide accounting
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information in an s390 hypervisor environment.
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config KEXEC
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bool "kexec system call"
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help
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kexec is a system call that implements the ability to shutdown your
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current kernel, and to start another kernel. It is like a reboot
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but is independent of hardware/microcode support.
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config ZFCPDUMP
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bool "zfcpdump support"
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select SMP
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default n
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help
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Select this option if you want to build an zfcpdump enabled kernel.
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Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
|
|
|
|
config S390_GUEST
|
|
bool "s390 guest support for KVM (EXPERIMENTAL)"
|
|
depends on 64BIT && EXPERIMENTAL
|
|
select VIRTIO
|
|
select VIRTIO_RING
|
|
select VIRTIO_CONSOLE
|
|
help
|
|
Select this option if you want to run the kernel as a guest under
|
|
the KVM hypervisor. This will add detection for KVM as well as a
|
|
virtio transport. If KVM is detected, the virtio console will be
|
|
the default console.
|
|
|
|
config SECCOMP
|
|
bool "Enable seccomp to safely compute untrusted bytecode"
|
|
depends on PROC_FS
|
|
default y
|
|
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.
|
|
|
|
endmenu
|
|
|
|
menu "Power Management"
|
|
|
|
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"
|
|
|
|
source "arch/s390/kvm/Kconfig"
|