config MMU

  	def_bool y

  config ZONE_DMA

  	def_bool y

  config LOCKDEP_SUPPORT

  	def_bool y

  config STACKTRACE_SUPPORT

  	def_bool y

  config HAVE_LATENCYTOP_SUPPORT
  	def_bool y

  config RWSEM_GENERIC_SPINLOCK
  	bool
  
  config RWSEM_XCHGADD_ALGORITHM

  	def_bool y

  config ARCH_HAS_ILOG2_U32

  	def_bool n

  
  config ARCH_HAS_ILOG2_U64

  	def_bool n

  config GENERIC_HWEIGHT

  	def_bool y

  config GENERIC_TIME_VSYSCALL
  	def_bool y

  config GENERIC_CLOCKEVENTS
  	def_bool y

  config GENERIC_BUG

  	def_bool y if BUG

  config GENERIC_BUG_RELATIVE_POINTERS
  	def_bool y

  config NO_IOMEM

  	def_bool y

  config NO_DMA
  	def_bool y

  config ARCH_DMA_ADDR_T_64BIT
  	def_bool 64BIT

  config GENERIC_LOCKBREAK

  	def_bool y if SMP && PREEMPT

  config PGSTE

  	def_bool y if KVM

  config VIRT_CPU_ACCOUNTING
  	def_bool y

  config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  	def_bool y

  config S390

  	def_bool y

  	select USE_GENERIC_SMP_HELPERS if SMP

  	select HAVE_SYSCALL_WRAPPERS

  	select HAVE_FUNCTION_TRACER

  	select HAVE_FUNCTION_TRACE_MCOUNT_TEST

  	select HAVE_FTRACE_MCOUNT_RECORD

  	select HAVE_C_RECORDMCOUNT

  	select HAVE_SYSCALL_TRACEPOINTS

  	select HAVE_DYNAMIC_FTRACE

  	select HAVE_FUNCTION_GRAPH_TRACER

  	select HAVE_REGS_AND_STACK_ACCESS_API

  	select HAVE_OPROFILE

  	select HAVE_KPROBES

  	select HAVE_KRETPROBES

  	select HAVE_KVM if 64BIT

  	select HAVE_ARCH_TRACEHOOK

  	select INIT_ALL_POSSIBLE

  	select HAVE_IRQ_WORK

  	select HAVE_PERF_EVENTS

  	select ARCH_HAVE_NMI_SAFE_CMPXCHG

  	select HAVE_KERNEL_GZIP
  	select HAVE_KERNEL_BZIP2
  	select HAVE_KERNEL_LZMA

  	select HAVE_KERNEL_LZO

  	select HAVE_KERNEL_XZ

  	select HAVE_GET_USER_PAGES_FAST

  	select HAVE_ARCH_MUTEX_CPU_RELAX

  	select HAVE_ARCH_JUMP_LABEL if !MARCH_G5

  	select HAVE_RCU_TABLE_FREE if SMP

  	select ARCH_SAVE_PAGE_KEYS if HIBERNATION

  	select ARCH_INLINE_SPIN_TRYLOCK
  	select ARCH_INLINE_SPIN_TRYLOCK_BH
  	select ARCH_INLINE_SPIN_LOCK
  	select ARCH_INLINE_SPIN_LOCK_BH
  	select ARCH_INLINE_SPIN_LOCK_IRQ
  	select ARCH_INLINE_SPIN_LOCK_IRQSAVE
  	select ARCH_INLINE_SPIN_UNLOCK
  	select ARCH_INLINE_SPIN_UNLOCK_BH
  	select ARCH_INLINE_SPIN_UNLOCK_IRQ
  	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
  	select ARCH_INLINE_READ_TRYLOCK
  	select ARCH_INLINE_READ_LOCK
  	select ARCH_INLINE_READ_LOCK_BH
  	select ARCH_INLINE_READ_LOCK_IRQ
  	select ARCH_INLINE_READ_LOCK_IRQSAVE
  	select ARCH_INLINE_READ_UNLOCK
  	select ARCH_INLINE_READ_UNLOCK_BH
  	select ARCH_INLINE_READ_UNLOCK_IRQ
  	select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
  	select ARCH_INLINE_WRITE_TRYLOCK
  	select ARCH_INLINE_WRITE_LOCK
  	select ARCH_INLINE_WRITE_LOCK_BH
  	select ARCH_INLINE_WRITE_LOCK_IRQ
  	select ARCH_INLINE_WRITE_LOCK_IRQSAVE
  	select ARCH_INLINE_WRITE_UNLOCK
  	select ARCH_INLINE_WRITE_UNLOCK_BH
  	select ARCH_INLINE_WRITE_UNLOCK_IRQ
  	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE

  config SCHED_OMIT_FRAME_POINTER

  	def_bool y

  source "init/Kconfig"

  source "kernel/Kconfig.freezer"

  menu "Base setup"
  
  comment "Processor type and features"

  source "kernel/time/Kconfig"

  config 64BIT

  	def_bool y
  	prompt "64 bit kernel"

  	help

  	  Select this option if you have an IBM z/Architecture machine

  	  and want to use the 64 bit addressing mode.

  config 32BIT

  	def_bool y if !64BIT

  config KTIME_SCALAR
  	def_bool 32BIT

  config SMP

  	def_bool y
  	prompt "Symmetric multi-processing support"

  	---help---
  	  This enables support for systems with more than one CPU. If you have
  	  a system with only one CPU, like most personal computers, say N. If
  	  you have a system with more than one CPU, say Y.
  
  	  If you say N here, the kernel will run on single and multiprocessor
  	  machines, but will use only one CPU of a multiprocessor machine. If
  	  you say Y here, the kernel will run on many, but not all,
  	  singleprocessor machines. On a singleprocessor machine, the kernel
  	  will run faster if you say N here.

  	  See also the SMP-HOWTO available at
  	  <http://www.tldp.org/docs.html#howto>.

  
  	  Even if you don't know what to do here, say Y.
  
  config NR_CPUS
  	int "Maximum number of CPUs (2-64)"
  	range 2 64
  	depends on SMP

  	default "32" if !64BIT
  	default "64" if 64BIT

  	help
  	  This allows you to specify the maximum number of CPUs which this
  	  kernel will support.  The maximum supported value is 64 and the
  	  minimum value which makes sense is 2.
  
  	  This is purely to save memory - each supported CPU adds
  	  approximately sixteen kilobytes to the kernel image.
  
  config HOTPLUG_CPU

  	def_bool y
  	prompt "Support for hot-pluggable CPUs"

  	depends on SMP
  	select HOTPLUG

  	help
  	  Say Y here to be able to turn CPUs off and on. CPUs
  	  can be controlled through /sys/devices/system/cpu/cpu#.
  	  Say N if you want to disable CPU hotplug.

  config SCHED_MC
  	def_bool y
  	prompt "Multi-core scheduler support"
  	depends on SMP
  	help
  	  Multi-core scheduler support improves the CPU scheduler's decision
  	  making when dealing with multi-core CPU chips at a cost of slightly
  	  increased overhead in some places.

  config SCHED_BOOK

  	def_bool y
  	prompt "Book scheduler support"

  	depends on SMP && SCHED_MC

  	help
  	  Book scheduler support improves the CPU scheduler's decision making
  	  when dealing with machines that have several books.

  config MATHEMU

  	def_bool y
  	prompt "IEEE FPU emulation"

  	depends on MARCH_G5
  	help
  	  This option is required for IEEE compliant floating point arithmetic

  	  on older ESA/390 machines. Say Y unless you know your machine doesn't

  	  need this.

  config COMPAT

  	def_bool y
  	prompt "Kernel support for 31 bit emulation"

  	depends on 64BIT

  	select COMPAT_BINFMT_ELF

  	help
  	  Select this option if you want to enable your system kernel to
  	  handle system-calls from ELF binaries for 31 bit ESA.  This option
  	  (and some other stuff like libraries and such) is needed for
  	  executing 31 bit applications.  It is safe to say "Y".

  config SYSVIPC_COMPAT

  	def_bool y if COMPAT && SYSVIPC

  config AUDIT_ARCH

  	def_bool y

  comment "Code generation options"
  
  choice
  	prompt "Processor type"
  	default MARCH_G5
  
  config MARCH_G5

  	bool "System/390 model G5 and G6"

  	depends on !64BIT

  	help
  	  Select this to build a 31 bit kernel that works

  	  on all ESA/390 and z/Architecture machines.

  
  config MARCH_Z900

  	bool "IBM zSeries model z800 and z900"

  	help

  	  Select this to enable optimizations for model z800/z900 (2064 and
  	  2066 series). This will enable some optimizations that are not
  	  available on older ESA/390 (31 Bit) only CPUs.

  
  config MARCH_Z990

  	bool "IBM zSeries model z890 and z990"

  	help

  	  Select this to enable optimizations for model z890/z990 (2084 and
  	  2086 series). The kernel will be slightly faster but will not work
  	  on older machines.

  config MARCH_Z9_109
  	bool "IBM System z9"
  	help

  	  Select this to enable optimizations for IBM System z9 (2094 and
  	  2096 series). The kernel will be slightly faster but will not work
  	  on older machines.

  config MARCH_Z10
  	bool "IBM System z10"
  	help

  	  Select this to enable optimizations for IBM System z10 (2097 and
  	  2098 series). The kernel will be slightly faster but will not work
  	  on older machines.

  config MARCH_Z196

  	bool "IBM zEnterprise 114 and 196"

  	help

  	  Select this to enable optimizations for IBM zEnterprise 114 and 196
  	  (2818 and 2817 series). The kernel will be slightly faster but will
  	  not work on older machines.

  endchoice
  
  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 SMALL_STACK

  	def_bool n
  	prompt "Use 8kb for kernel stack instead of 16kb"

  	depends on PACK_STACK && 64BIT && !LOCKDEP

  	help
  	  If you say Y here and the compiler supports the -mkernel-backchain

  	  option the kernel will use a smaller kernel stack size. The reduced
  	  size is 8kb instead of 16kb. This allows to run more threads on a
  	  system and reduces the pressure on the memory management for higher
  	  order page allocations.

  
  	  Say N 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.

  config ARCH_POPULATES_NODE_MAP
  	def_bool y

  comment "Kernel preemption"
  
  source "kernel/Kconfig.preempt"

  config ARCH_SPARSEMEM_ENABLE
  	def_bool y
  	select SPARSEMEM_VMEMMAP_ENABLE
  	select SPARSEMEM_VMEMMAP

  	select SPARSEMEM_STATIC if !64BIT

  
  config ARCH_SPARSEMEM_DEFAULT
  	def_bool y

  config ARCH_SELECT_MEMORY_MODEL

  	def_bool y

  config ARCH_ENABLE_MEMORY_HOTPLUG

  	def_bool y if SPARSEMEM

  config ARCH_ENABLE_MEMORY_HOTREMOVE
  	def_bool y

  config ARCH_HIBERNATION_POSSIBLE

  	def_bool y if 64BIT

  source "mm/Kconfig"

  comment "I/O subsystem configuration"

  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.

  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.

  comment "Misc"

  config IPL

  	def_bool y
  	prompt "Builtin IPL record support"

  	help
  	  If you want to use the produced kernel to IPL directly from a
  	  device, you have to merge a bootsector specific to the device
  	  into the first bytes of the kernel. You will have to select the
  	  IPL device.
  
  choice
  	prompt "IPL method generated into head.S"
  	depends on IPL

  	default IPL_VM

  	help
  	  Select "tape" if you want to IPL the image from a Tape.
  
  	  Select "vm_reader" if you are running under VM/ESA and want
  	  to IPL the image from the emulated card reader.
  
  config IPL_TAPE
  	bool "tape"
  
  config IPL_VM
  	bool "vm_reader"
  
  endchoice
  
  source "fs/Kconfig.binfmt"

  config FORCE_MAX_ZONEORDER
  	int
  	default "9"

  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

  	def_bool y
  	prompt "VM shared kernel support"

  	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.

  source kernel/Kconfig.hz

  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.

  config KEXEC

  	def_bool n
  	prompt "kexec system call"

  	help
  	  kexec is a system call that implements the ability to shutdown your
  	  current kernel, and to start another kernel.  It is like a reboot
  	  but is independent of hardware/microcode support.

  config CRASH_DUMP
  	bool "kernel crash dumps"
  	depends on 64BIT

  	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.
  	  For more details see Documentation/kdump/kdump.txt

  config ZFCPDUMP

  	def_bool n
  	prompt "zfcpdump support"

  	select SMP

  	help
  	  Select this option if you want to build an zfcpdump enabled kernel.

  	  Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.

  config S390_GUEST

  	def_bool y
  	prompt "s390 guest support for KVM (EXPERIMENTAL)"

  	depends on 64BIT && EXPERIMENTAL

  	select VIRTUALIZATION

  	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

  	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.

  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"