# SPDX-License-Identifier: GPL-2.0
  config MMU
  	def_bool y
  
  config ZONE_DMA
  	def_bool y
  
  config CPU_BIG_ENDIAN
  	def_bool y
  
  config LOCKDEP_SUPPORT
  	def_bool y
  
  config STACKTRACE_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_BUG
  	def_bool y if BUG
  
  config GENERIC_BUG_RELATIVE_POINTERS
  	def_bool y
  
  config ARCH_DMA_ADDR_T_64BIT
  	def_bool y
  
  config GENERIC_LOCKBREAK
  	def_bool y if SMP && PREEMPT
  
  config PGSTE
  	def_bool y if KVM
  
  config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  	def_bool y
  
  config KEXEC
  	def_bool y
  	select KEXEC_CORE
  
  config AUDIT_ARCH
  	def_bool y
  
  config NO_IOPORT_MAP
  	def_bool y
  
  config PCI_QUIRKS
  	def_bool n
  
  config ARCH_SUPPORTS_UPROBES
  	def_bool y
  
  config S390
  	def_bool y
  	select ARCH_BINFMT_ELF_STATE
  	select ARCH_HAS_DEVMEM_IS_ALLOWED
  	select ARCH_HAS_ELF_RANDOMIZE
  	select ARCH_HAS_GCOV_PROFILE_ALL
  	select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
  	select ARCH_HAS_KCOV
  	select ARCH_HAS_SET_MEMORY
  	select ARCH_HAS_SG_CHAIN
  	select ARCH_HAS_STRICT_KERNEL_RWX
  	select ARCH_HAS_STRICT_MODULE_RWX
  	select ARCH_HAS_UBSAN_SANITIZE_ALL
  	select ARCH_HAVE_NMI_SAFE_CMPXCHG
  	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_TRYLOCK
  	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_SPIN_LOCK
  	select ARCH_INLINE_SPIN_LOCK_BH
  	select ARCH_INLINE_SPIN_LOCK_IRQ
  	select ARCH_INLINE_SPIN_LOCK_IRQSAVE
  	select ARCH_INLINE_SPIN_TRYLOCK
  	select ARCH_INLINE_SPIN_TRYLOCK_BH
  	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_WRITE_LOCK
  	select ARCH_INLINE_WRITE_LOCK_BH
  	select ARCH_INLINE_WRITE_LOCK_IRQ
  	select ARCH_INLINE_WRITE_LOCK_IRQSAVE
  	select ARCH_INLINE_WRITE_TRYLOCK
  	select ARCH_INLINE_WRITE_UNLOCK
  	select ARCH_INLINE_WRITE_UNLOCK_BH
  	select ARCH_INLINE_WRITE_UNLOCK_IRQ
  	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
  	select ARCH_SAVE_PAGE_KEYS if HIBERNATION
  	select ARCH_SUPPORTS_ATOMIC_RMW
  	select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
  	select ARCH_SUPPORTS_NUMA_BALANCING
  	select ARCH_USE_BUILTIN_BSWAP
  	select ARCH_USE_CMPXCHG_LOCKREF
  	select ARCH_WANTS_DYNAMIC_TASK_STRUCT
  	select ARCH_WANTS_PROT_NUMA_PROT_NONE
  	select ARCH_WANTS_UBSAN_NO_NULL
  	select ARCH_WANT_IPC_PARSE_VERSION
  	select BUILDTIME_EXTABLE_SORT
  	select CLONE_BACKWARDS2
  	select DYNAMIC_FTRACE if FUNCTION_TRACER
  	select GENERIC_CLOCKEVENTS
  	select GENERIC_CPU_AUTOPROBE
  	select GENERIC_CPU_DEVICES if !SMP
  	select GENERIC_CPU_VULNERABILITIES
  	select GENERIC_FIND_FIRST_BIT
  	select GENERIC_SMP_IDLE_THREAD
  	select GENERIC_TIME_VSYSCALL
  	select HAVE_ALIGNED_STRUCT_PAGE if SLUB
  	select HAVE_ARCH_AUDITSYSCALL
  	select HAVE_ARCH_JUMP_LABEL
  	select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
  	select HAVE_ARCH_SECCOMP_FILTER
  	select HAVE_ARCH_SOFT_DIRTY
  	select HAVE_ARCH_TRACEHOOK
  	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
  	select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
  	select HAVE_CMPXCHG_DOUBLE
  	select HAVE_CMPXCHG_LOCAL
  	select HAVE_COPY_THREAD_TLS
  	select HAVE_DEBUG_KMEMLEAK
  	select HAVE_DMA_API_DEBUG
  	select HAVE_DMA_CONTIGUOUS
  	select DMA_NOOP_OPS
  	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
  	select HAVE_FUTEX_CMPXCHG if FUTEX
  	select HAVE_KERNEL_BZIP2
  	select HAVE_KERNEL_GZIP
  	select HAVE_KERNEL_LZ4
  	select HAVE_KERNEL_LZMA
  	select HAVE_KERNEL_LZO
  	select HAVE_KERNEL_XZ
  	select HAVE_KPROBES
  	select HAVE_KRETPROBES
  	select HAVE_KVM
  	select HAVE_LIVEPATCH
  	select HAVE_MEMBLOCK
  	select HAVE_MEMBLOCK_NODE_MAP
  	select HAVE_MEMBLOCK_PHYS_MAP
  	select HAVE_MOD_ARCH_SPECIFIC
  	select HAVE_OPROFILE
  	select HAVE_PERF_EVENTS
  	select HAVE_REGS_AND_STACK_ACCESS_API
  	select HAVE_SYSCALL_TRACEPOINTS
  	select HAVE_VIRT_CPU_ACCOUNTING
  	select MODULES_USE_ELF_RELA
  	select NO_BOOTMEM
  	select OLD_SIGACTION
  	select OLD_SIGSUSPEND3
  	select SPARSE_IRQ
  	select SYSCTL_EXCEPTION_TRACE
  	select THREAD_INFO_IN_TASK
  	select TTY
  	select VIRT_CPU_ACCOUNTING
  	select ARCH_HAS_SCALED_CPUTIME
  	select VIRT_TO_BUS
  	select HAVE_NMI
  
  
  config SCHED_OMIT_FRAME_POINTER
  	def_bool y
  
  config PGTABLE_LEVELS
  	int
  	default 5
  
  source "init/Kconfig"
  
  source "kernel/Kconfig.freezer"
  
  source "kernel/livepatch/Kconfig"
  
  menu "Processor type and features"
  
  config HAVE_MARCH_Z900_FEATURES
  	def_bool n
  
  config HAVE_MARCH_Z990_FEATURES
  	def_bool n
  	select HAVE_MARCH_Z900_FEATURES
  
  config HAVE_MARCH_Z9_109_FEATURES
  	def_bool n
  	select HAVE_MARCH_Z990_FEATURES
  
  config HAVE_MARCH_Z10_FEATURES
  	def_bool n
  	select HAVE_MARCH_Z9_109_FEATURES
  
  config HAVE_MARCH_Z196_FEATURES
  	def_bool n
  	select HAVE_MARCH_Z10_FEATURES
  
  config HAVE_MARCH_ZEC12_FEATURES
  	def_bool n
  	select HAVE_MARCH_Z196_FEATURES
  
  config HAVE_MARCH_Z13_FEATURES
  	def_bool n
  	select HAVE_MARCH_ZEC12_FEATURES
  
  config HAVE_MARCH_Z14_FEATURES
  	def_bool n
  	select HAVE_MARCH_Z13_FEATURES
  
  choice
  	prompt "Processor type"
  	default MARCH_Z196
  
  config MARCH_Z900
  	bool "IBM zSeries model z800 and z900"
  	select HAVE_MARCH_Z900_FEATURES
  	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"
  	select HAVE_MARCH_Z990_FEATURES
  	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"
  	select HAVE_MARCH_Z9_109_FEATURES
  	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"
  	select HAVE_MARCH_Z10_FEATURES
  	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"
  	select HAVE_MARCH_Z196_FEATURES
  	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.
  
  config MARCH_ZEC12
  	bool "IBM zBC12 and zEC12"
  	select HAVE_MARCH_ZEC12_FEATURES
  	help
  	  Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
  	  2827 series). The kernel will be slightly faster but will not work on
  	  older machines.
  
  config MARCH_Z13
  	bool "IBM z13s and z13"
  	select HAVE_MARCH_Z13_FEATURES
  	help
  	  Select this to enable optimizations for IBM z13s and z13 (2965 and
  	  2964 series). The kernel will be slightly faster but will not work on
  	  older machines.
  
  config MARCH_Z14
  	bool "IBM z14"
  	select HAVE_MARCH_Z14_FEATURES
  	help
  	  Select this to enable optimizations for IBM z14 (3906 series).
  	  The kernel will be slightly faster but will not work on older
  	  machines.
  
  endchoice
  
  config MARCH_Z900_TUNE
  	def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
  
  config MARCH_Z990_TUNE
  	def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
  
  config MARCH_Z9_109_TUNE
  	def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
  
  config MARCH_Z10_TUNE
  	def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
  
  config MARCH_Z196_TUNE
  	def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
  
  config MARCH_ZEC12_TUNE
  	def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
  
  config MARCH_Z13_TUNE
  	def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
  
  config MARCH_Z14_TUNE
  	def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
  
  choice
  	prompt "Tune code generation"
  	default TUNE_DEFAULT
  	help
  	  Cause the compiler to tune (-mtune) the generated code for a machine.
  	  This will make the code run faster on the selected machine but
  	  somewhat slower on other machines.
  	  This option only changes how the compiler emits instructions, not the
  	  selection of instructions itself, so the resulting kernel will run on
  	  all other machines.
  
  config TUNE_DEFAULT
  	bool "Default"
  	help
  	  Tune the generated code for the target processor for which the kernel
  	  will be compiled.
  
  config TUNE_Z900
  	bool "IBM zSeries model z800 and z900"
  
  config TUNE_Z990
  	bool "IBM zSeries model z890 and z990"
  
  config TUNE_Z9_109
  	bool "IBM System z9"
  
  config TUNE_Z10
  	bool "IBM System z10"
  
  config TUNE_Z196
  	bool "IBM zEnterprise 114 and 196"
  
  config TUNE_ZEC12
  	bool "IBM zBC12 and zEC12"
  
  config TUNE_Z13
  	bool "IBM z13"
  
  config TUNE_Z14
  	bool "IBM z14"
  
  endchoice
  
  config 64BIT
  	def_bool y
  
  config COMPAT
  	def_bool y
  	prompt "Kernel support for 31 bit emulation"
  	select COMPAT_BINFMT_ELF if BINFMT_ELF
  	select ARCH_WANT_OLD_COMPAT_IPC
  	select COMPAT_OLD_SIGACTION
  	depends on MULTIUSER
  	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 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 uni- 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,
  	  uniprocessor machines. On a uniprocessor 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 (2-512)"
  	range 2 512
  	depends on SMP
  	default "64"
  	help
  	  This allows you to specify the maximum number of CPUs which this
  	  kernel will support. The maximum supported value is 512 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
  	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.
  
  # Some NUMA nodes have memory ranges that span
  # other nodes.	Even though a pfn is valid and
  # between a node's start and end pfns, it may not
  # reside on that node.	See memmap_init_zone()
  # for details. <- They meant memory holes!
  config NODES_SPAN_OTHER_NODES
  	def_bool NUMA
  
  config NUMA
  	bool "NUMA support"
  	depends on SMP && SCHED_TOPOLOGY
  	default n
  	help
  	  Enable NUMA support
  
  	  This option adds NUMA support to the kernel.
  
  	  An operation mode can be selected by appending
  	  numa=<method> to the kernel command line.
  
  	  The default behaviour is identical to appending numa=plain to
  	  the command line. This will create just one node with all
  	  available memory and all CPUs in it.
  
  config NODES_SHIFT
  	int "Maximum NUMA nodes (as a power of 2)"
  	range 1 10
  	depends on NUMA
  	default "4"
  	help
  	  Specify the maximum number of NUMA nodes available on the target
  	  system. Increases memory reserved to accommodate various tables.
  
  menu "Select NUMA modes"
  	depends on NUMA
  
  config NUMA_EMU
  	bool "NUMA emulation"
  	default y
  	help
  	  Numa emulation mode will split the available system memory into
  	  equal chunks which then are distributed over the configured number
  	  of nodes in a round-robin manner.
  
  	  The number of fake nodes is limited by the number of available memory
  	  chunks (i.e. memory size / fake size) and the number of supported
  	  nodes in the kernel.
  
  	  The CPUs are assigned to the nodes in a way that partially respects
  	  the original machine topology (if supported by the machine).
  	  Fair distribution of the CPUs is not guaranteed.
  
  config EMU_SIZE
  	hex "NUMA emulation memory chunk size"
  	default 0x10000000
  	range 0x400000 0x100000000
  	depends on NUMA_EMU
  	help
  	  Select the default size by which the memory is chopped and then
  	  assigned to emulated NUMA nodes.
  
  	  This can be overridden by specifying
  
  	  emu_size=<n>
  
  	  on the kernel command line where also suffixes K, M, G, and T are
  	  supported.
  
  endmenu
  
  config SCHED_SMT
  	def_bool n
  
  config SCHED_MC
  	def_bool n
  
  config SCHED_BOOK
  	def_bool n
  
  config SCHED_DRAWER
  	def_bool n
  
  config SCHED_TOPOLOGY
  	def_bool y
  	prompt "Topology scheduler support"
  	depends on SMP
  	select SCHED_SMT
  	select SCHED_MC
  	select SCHED_BOOK
  	select SCHED_DRAWER
  	help
  	  Topology scheduler support improves the CPU scheduler's decision
  	  making when dealing with machines that have multi-threading,
  	  multiple cores or multiple books.
  
  source kernel/Kconfig.preempt
  
  source kernel/Kconfig.hz
  
  config ARCH_RANDOM
  	def_bool y
  	prompt "s390 architectural random number generation API"
  	help
  	  Enable the s390 architectural random number generation API
  	  to provide random data for all consumers within the Linux
  	  kernel.
  
  	  When enabled the arch_random_* functions declared in linux/random.h
  	  are implemented. The implementation is based on the s390 CPACF
  	  instruction subfunction TRNG which provides a real true random
  	  number generator.
  
  	  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 "Memory setup"
  
  config ARCH_SPARSEMEM_ENABLE
  	def_bool y
  	select SPARSEMEM_VMEMMAP_ENABLE
  	select SPARSEMEM_VMEMMAP
  
  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_ENABLE_SPLIT_PMD_PTLOCK
  	def_bool y
  
  config FORCE_MAX_ZONEORDER
  	int
  	default "9"
  
  source "mm/Kconfig"
  
  config MAX_PHYSMEM_BITS
  	int "Maximum size of supported physical memory in bits (42-53)"
  	range 42 53
  	default "46"
  	help
  	  This option specifies the maximum supported size of physical memory
  	  in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB).
  	  Increasing the number of bits also increases the kernel image size.
  	  By default 46 bits (64TB) are supported.
  
  config PACK_STACK
  	def_bool y
  	prompt "Pack kernel stack"
  	help
  	  This option enables the compiler option -mkernel-backchain if it
  	  is available. If the option is available the compiler supports
  	  the new stack layout which dramatically reduces the minimum stack
  	  frame size. With an old compiler a non-leaf function needs a
  	  minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
  	  -mkernel-backchain the minimum size drops to 16 byte on 31 bit
  	  and 24 byte on 64 bit.
  
  	  Say Y if you are unsure.
  
  config CHECK_STACK
  	def_bool y
  	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.
  
  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 "128"
  	help
  	  This allows you to specify the maximum number of PCI functions which
  	  this kernel will support.
  
  source "drivers/pci/Kconfig"
  
  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.
  
  config VFIO_CCW
  	def_tristate n
  	prompt "Support for VFIO-CCW subchannels"
  	depends on S390_CCW_IOMMU && VFIO_MDEV
  	help
  	  This driver allows usage of I/O subchannels via VFIO-CCW.
  
  	  To compile this driver as a module, choose M here: the
  	  module will be called vfio_ccw.
  
  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.
  
  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