# x86 configuration

  mainmenu "Linux Kernel Configuration for x86"
  
  # Select 32 or 64 bit
  config 64BIT

  	bool "64-bit kernel" if ARCH = "x86"
  	default ARCH = "x86_64"

  	help
  	  Say yes to build a 64-bit kernel - formerly known as x86_64
  	  Say no to build a 32-bit kernel - formerly known as i386
  
  config X86_32
  	def_bool !64BIT
  
  config X86_64
  	def_bool 64BIT

  
  ### Arch settings

  config X86

  	def_bool y

  	select HAVE_UNSTABLE_SCHED_CLOCK

  	select HAVE_IDE

  	select HAVE_OPROFILE

  	select HAVE_KPROBES

  	select HAVE_KRETPROBES

  	select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)

  	select HAVE_ARCH_KGDB if !X86_VOYAGER

  config ARCH_DEFCONFIG

  	string

  	default "arch/x86/configs/i386_defconfig" if X86_32
  	default "arch/x86/configs/x86_64_defconfig" if X86_64

  config GENERIC_LOCKBREAK

  	def_bool n

  config GENERIC_TIME

  	def_bool y

  
  config GENERIC_CMOS_UPDATE

  	def_bool y

  
  config CLOCKSOURCE_WATCHDOG

  	def_bool y

  
  config GENERIC_CLOCKEVENTS

  	def_bool y

  
  config GENERIC_CLOCKEVENTS_BROADCAST

  	def_bool y

  	depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
  
  config LOCKDEP_SUPPORT

  	def_bool y

  
  config STACKTRACE_SUPPORT

  	def_bool y

  config HAVE_LATENCYTOP_SUPPORT
  	def_bool y

  config FAST_CMPXCHG_LOCAL
  	bool
  	default y

  config MMU

  	def_bool y

  
  config ZONE_DMA

  	def_bool y

  config SBUS
  	bool
  
  config GENERIC_ISA_DMA

  	def_bool y

  
  config GENERIC_IOMAP

  	def_bool y

  
  config GENERIC_BUG

  	def_bool y

  	depends on BUG
  
  config GENERIC_HWEIGHT

  	def_bool y

  config GENERIC_GPIO
  	def_bool n

  config ARCH_MAY_HAVE_PC_FDC

  	def_bool y

  config RWSEM_GENERIC_SPINLOCK
  	def_bool !X86_XADD
  
  config RWSEM_XCHGADD_ALGORITHM
  	def_bool X86_XADD
  
  config ARCH_HAS_ILOG2_U32
  	def_bool n
  
  config ARCH_HAS_ILOG2_U64
  	def_bool n

  config ARCH_HAS_CPU_IDLE_WAIT
  	def_bool y

  config GENERIC_CALIBRATE_DELAY
  	def_bool y

  config GENERIC_TIME_VSYSCALL
  	bool
  	default X86_64

  config ARCH_HAS_CPU_RELAX
  	def_bool y

  config ARCH_HAS_CACHE_LINE_SIZE
  	def_bool y

  config HAVE_SETUP_PER_CPU_AREA

  	def_bool X86_64 || (X86_SMP && !X86_VOYAGER)

  config HAVE_CPUMASK_OF_CPU_MAP
  	def_bool X86_64_SMP

  config ARCH_HIBERNATION_POSSIBLE
  	def_bool y
  	depends on !SMP || !X86_VOYAGER

  config ARCH_SUSPEND_POSSIBLE
  	def_bool y
  	depends on !X86_VOYAGER

  config ZONE_DMA32
  	bool
  	default X86_64
  
  config ARCH_POPULATES_NODE_MAP
  	def_bool y
  
  config AUDIT_ARCH
  	bool
  	default X86_64

  config ARCH_SUPPORTS_AOUT
  	def_bool y

  config ARCH_SUPPORTS_OPTIMIZED_INLINING
  	def_bool y

  # Use the generic interrupt handling code in kernel/irq/:
  config GENERIC_HARDIRQS
  	bool
  	default y
  
  config GENERIC_IRQ_PROBE
  	bool
  	default y
  
  config GENERIC_PENDING_IRQ
  	bool
  	depends on GENERIC_HARDIRQS && SMP
  	default y
  
  config X86_SMP
  	bool

  	depends on SMP && ((X86_32 && !X86_VOYAGER) || X86_64)

  	default y

  config X86_32_SMP
  	def_bool y
  	depends on X86_32 && SMP
  
  config X86_64_SMP
  	def_bool y
  	depends on X86_64 && SMP

  config X86_HT
  	bool

  	depends on SMP

  	depends on (X86_32 && !(X86_VISWS || X86_VOYAGER)) || X86_64

  	default y
  
  config X86_BIOS_REBOOT
  	bool

  	depends on !X86_VISWS && !X86_VOYAGER

  	default y
  
  config X86_TRAMPOLINE
  	bool

  	depends on X86_SMP || (X86_VOYAGER && SMP) || (64BIT && ACPI_SLEEP)

  	default y
  
  config KTIME_SCALAR
  	def_bool X86_32

  source "init/Kconfig"

  menu "Processor type and features"
  
  source "kernel/time/Kconfig"
  
  config SMP
  	bool "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.
  
  	  Note that if you say Y here and choose architecture "586" or
  	  "Pentium" under "Processor family", the kernel will not work on 486
  	  architectures. Similarly, multiprocessor kernels for the "PPro"
  	  architecture may not work on all Pentium based boards.
  
  	  People using multiprocessor machines who say Y here should also say
  	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
  	  Management" code will be disabled if you say Y here.

  	  See also <file:Documentation/i386/IO-APIC.txt>,

  	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  	  <http://www.tldp.org/docs.html#howto>.
  
  	  If you don't know what to do here, say N.
  
  choice
  	prompt "Subarchitecture Type"
  	default X86_PC
  
  config X86_PC
  	bool "PC-compatible"
  	help
  	  Choose this option if your computer is a standard PC or compatible.
  
  config X86_ELAN
  	bool "AMD Elan"
  	depends on X86_32
  	help
  	  Select this for an AMD Elan processor.
  
  	  Do not use this option for K6/Athlon/Opteron processors!
  
  	  If unsure, choose "PC-compatible" instead.
  
  config X86_VOYAGER
  	bool "Voyager (NCR)"

  	depends on X86_32 && (SMP || BROKEN)

  	help
  	  Voyager is an MCA-based 32-way capable SMP architecture proprietary
  	  to NCR Corp.  Machine classes 345x/35xx/4100/51xx are Voyager-based.
  
  	  *** WARNING ***
  
  	  If you do not specifically know you have a Voyager based machine,
  	  say N here, otherwise the kernel you build will not be bootable.
  
  config X86_NUMAQ
  	bool "NUMAQ (IBM/Sequent)"

  	depends on SMP && X86_32

  	select NUMA

  	help
  	  This option is used for getting Linux to run on a (IBM/Sequent) NUMA
  	  multiquad box. This changes the way that processors are bootstrapped,
  	  and uses Clustered Logical APIC addressing mode instead of Flat Logical.
  	  You will need a new lynxer.elf file to flash your firmware with - send
  	  email to <Martin.Bligh@us.ibm.com>.
  
  config X86_SUMMIT
  	bool "Summit/EXA (IBM x440)"
  	depends on X86_32 && SMP
  	help
  	  This option is needed for IBM systems that use the Summit/EXA chipset.
  	  In particular, it is needed for the x440.
  
  	  If you don't have one of these computers, you should say N here.
  	  If you want to build a NUMA kernel, you must select ACPI.
  
  config X86_BIGSMP
  	bool "Support for other sub-arch SMP systems with more than 8 CPUs"
  	depends on X86_32 && SMP
  	help
  	  This option is needed for the systems that have more than 8 CPUs
  	  and if the system is not of any sub-arch type above.
  
  	  If you don't have such a system, you should say N here.
  
  config X86_VISWS
  	bool "SGI 320/540 (Visual Workstation)"
  	depends on X86_32
  	help
  	  The SGI Visual Workstation series is an IA32-based workstation
  	  based on SGI systems chips with some legacy PC hardware attached.
  
  	  Say Y here to create a kernel to run on the SGI 320 or 540.
  
  	  A kernel compiled for the Visual Workstation will not run on PCs
  	  and vice versa. See <file:Documentation/sgi-visws.txt> for details.
  
  config X86_GENERICARCH
         bool "Generic architecture (Summit, bigsmp, ES7000, default)"
  	depends on X86_32
         help
            This option compiles in the Summit, bigsmp, ES7000, default subarchitectures.
  	  It is intended for a generic binary kernel.
  	  If you want a NUMA kernel, select ACPI.   We need SRAT for NUMA.
  
  config X86_ES7000
  	bool "Support for Unisys ES7000 IA32 series"
  	depends on X86_32 && SMP
  	help
  	  Support for Unisys ES7000 systems.  Say 'Y' here if this kernel is
  	  supposed to run on an IA32-based Unisys ES7000 system.
  	  Only choose this option if you have such a system, otherwise you
  	  should say N here.

  config X86_RDC321X
  	bool "RDC R-321x SoC"
  	depends on X86_32
  	select M486
  	select X86_REBOOTFIXUPS
  	select GENERIC_GPIO

  	select LEDS_CLASS

  	select LEDS_GPIO

  	select NEW_LEDS

  	help
  	  This option is needed for RDC R-321x system-on-chip, also known
  	  as R-8610-(G).
  	  If you don't have one of these chips, you should say N here.

  config X86_VSMP
  	bool "Support for ScaleMP vSMP"

  	select PARAVIRT

  	depends on X86_64

  	help

  	  Support for ScaleMP vSMP systems.  Say 'Y' here if this kernel is
  	  supposed to run on these EM64T-based machines.  Only choose this option
  	  if you have one of these machines.
  
  endchoice
  
  config SCHED_NO_NO_OMIT_FRAME_POINTER

  	def_bool y
  	prompt "Single-depth WCHAN output"

  	depends on X86_32
  	help
  	  Calculate simpler /proc/<PID>/wchan values. If this option
  	  is disabled then wchan values will recurse back to the
  	  caller function. This provides more accurate wchan values,
  	  at the expense of slightly more scheduling overhead.
  
  	  If in doubt, say "Y".

  menuconfig PARAVIRT_GUEST
  	bool "Paravirtualized guest support"

  	help
  	  Say Y here to get to see options related to running Linux under
  	  various hypervisors.  This option alone does not add any kernel code.
  
  	  If you say N, all options in this submenu will be skipped and disabled.
  
  if PARAVIRT_GUEST
  
  source "arch/x86/xen/Kconfig"
  
  config VMI
  	bool "VMI Guest support"
  	select PARAVIRT

  	depends on X86_32

  	depends on !(X86_VISWS || X86_VOYAGER)
  	help
  	  VMI provides a paravirtualized interface to the VMware ESX server
  	  (it could be used by other hypervisors in theory too, but is not
  	  at the moment), by linking the kernel to a GPL-ed ROM module
  	  provided by the hypervisor.

  config KVM_CLOCK
  	bool "KVM paravirtualized clock"
  	select PARAVIRT
  	depends on !(X86_VISWS || X86_VOYAGER)
  	help
  	  Turning on this option will allow you to run a paravirtualized clock
  	  when running over the KVM hypervisor. Instead of relying on a PIT
  	  (or probably other) emulation by the underlying device model, the host
  	  provides the guest with timing infrastructure such as time of day, and
  	  system time

  config KVM_GUEST
  	bool "KVM Guest support"
  	select PARAVIRT
  	depends on !(X86_VISWS || X86_VOYAGER)
  	help
  	 This option enables various optimizations for running under the KVM
  	 hypervisor.

  source "arch/x86/lguest/Kconfig"

  config PARAVIRT
  	bool "Enable paravirtualization code"

  	depends on !(X86_VISWS || X86_VOYAGER)

  	help
  	  This changes the kernel so it can modify itself when it is run
  	  under a hypervisor, potentially improving performance significantly
  	  over full virtualization.  However, when run without a hypervisor
  	  the kernel is theoretically slower and slightly larger.

  endif

  config MEMTEST_BOOTPARAM
  	bool "Memtest boot parameter"
  	depends on X86_64
  	default y
  	help
  	  This option adds a kernel parameter 'memtest', which allows memtest
  	  to be disabled at boot.  If this option is selected, memtest
  	  functionality can be disabled with memtest=0 on the kernel
  	  command line.  The purpose of this option is to allow a single
  	  kernel image to be distributed with memtest built in, but not
  	  necessarily enabled.
  
  	  If you are unsure how to answer this question, answer Y.
  
  config MEMTEST_BOOTPARAM_VALUE
  	int "Memtest boot parameter default value (0-4)"
  	depends on MEMTEST_BOOTPARAM
  	range 0 4
  	default 0
  	help
  	  This option sets the default value for the kernel parameter
  	  'memtest', which allows memtest to be disabled at boot.  If this
  	  option is set to 0 (zero), the memtest kernel parameter will
  	  default to 0, disabling memtest at bootup.  If this option is
  	  set to 4, the memtest kernel parameter will default to 4,
  	  enabling memtest at bootup, and use that as pattern number.
  
  	  If you are unsure how to answer this question, answer 0.

  config ACPI_SRAT

  	def_bool y

  	depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
  	select ACPI_NUMA
  
  config HAVE_ARCH_PARSE_SRAT

  	def_bool y
  	depends on ACPI_SRAT

  
  config X86_SUMMIT_NUMA

  	def_bool y

  	depends on X86_32 && NUMA && (X86_SUMMIT || X86_GENERICARCH)
  
  config X86_CYCLONE_TIMER

  	def_bool y

  	depends on X86_32 && X86_SUMMIT || X86_GENERICARCH
  
  config ES7000_CLUSTERED_APIC

  	def_bool y

  	depends on SMP && X86_ES7000 && MPENTIUMIII
  
  source "arch/x86/Kconfig.cpu"
  
  config HPET_TIMER

  	def_bool X86_64

  	prompt "HPET Timer Support" if X86_32

  	help
           Use the IA-PC HPET (High Precision Event Timer) to manage
           time in preference to the PIT and RTC, if a HPET is
           present.
           HPET is the next generation timer replacing legacy 8254s.
           The HPET provides a stable time base on SMP
           systems, unlike the TSC, but it is more expensive to access,
           as it is off-chip.  You can find the HPET spec at
           <http://www.intel.com/hardwaredesign/hpetspec.htm>.
  
           You can safely choose Y here.  However, HPET will only be
           activated if the platform and the BIOS support this feature.
           Otherwise the 8254 will be used for timing services.
  
           Choose N to continue using the legacy 8254 timer.
  
  config HPET_EMULATE_RTC

  	def_bool y

  	depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)

  
  # Mark as embedded because too many people got it wrong.
  # The code disables itself when not needed.

  config DMI
  	default y
  	bool "Enable DMI scanning" if EMBEDDED
  	help
  	  Enabled scanning of DMI to identify machine quirks. Say Y
  	  here unless you have verified that your setup is not
  	  affected by entries in the DMI blacklist. Required by PNP
  	  BIOS code.

  config GART_IOMMU
  	bool "GART IOMMU support" if EMBEDDED
  	default y
  	select SWIOTLB
  	select AGP
  	depends on X86_64 && PCI
  	help
  	  Support for full DMA access of devices with 32bit memory access only
  	  on systems with more than 3GB. This is usually needed for USB,
  	  sound, many IDE/SATA chipsets and some other devices.
  	  Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
  	  based hardware IOMMU and a software bounce buffer based IOMMU used
  	  on Intel systems and as fallback.
  	  The code is only active when needed (enough memory and limited
  	  device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
  	  too.
  
  config CALGARY_IOMMU
  	bool "IBM Calgary IOMMU support"
  	select SWIOTLB
  	depends on X86_64 && PCI && EXPERIMENTAL
  	help
  	  Support for hardware IOMMUs in IBM's xSeries x366 and x460
  	  systems. Needed to run systems with more than 3GB of memory
  	  properly with 32-bit PCI devices that do not support DAC
  	  (Double Address Cycle). Calgary also supports bus level
  	  isolation, where all DMAs pass through the IOMMU.  This
  	  prevents them from going anywhere except their intended
  	  destination. This catches hard-to-find kernel bugs and
  	  mis-behaving drivers and devices that do not use the DMA-API
  	  properly to set up their DMA buffers.  The IOMMU can be
  	  turned off at boot time with the iommu=off parameter.
  	  Normally the kernel will make the right choice by itself.
  	  If unsure, say Y.
  
  config CALGARY_IOMMU_ENABLED_BY_DEFAULT

  	def_bool y
  	prompt "Should Calgary be enabled by default?"

  	depends on CALGARY_IOMMU
  	help
  	  Should Calgary be enabled by default? if you choose 'y', Calgary
  	  will be used (if it exists). If you choose 'n', Calgary will not be
  	  used even if it exists. If you choose 'n' and would like to use
  	  Calgary anyway, pass 'iommu=calgary' on the kernel command line.
  	  If unsure, say Y.
  
  # need this always selected by IOMMU for the VIA workaround
  config SWIOTLB
  	bool
  	help
  	  Support for software bounce buffers used on x86-64 systems
  	  which don't have a hardware IOMMU (e.g. the current generation
  	  of Intel's x86-64 CPUs). Using this PCI devices which can only
  	  access 32-bits of memory can be used on systems with more than
  	  3 GB of memory. If unsure, say Y.

  config IOMMU_HELPER
  	def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB)

  
  config NR_CPUS
  	int "Maximum number of CPUs (2-255)"
  	range 2 255
  	depends on SMP
  	default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
  	default "8"
  	help
  	  This allows you to specify the maximum number of CPUs which this
  	  kernel will support.  The maximum supported value is 255 and the
  	  minimum value which makes sense is 2.
  
  	  This is purely to save memory - each supported CPU adds
  	  approximately eight kilobytes to the kernel image.
  
  config SCHED_SMT
  	bool "SMT (Hyperthreading) scheduler support"

  	depends on X86_HT

  	help
  	  SMT scheduler support improves the CPU scheduler's decision making
  	  when dealing with Intel Pentium 4 chips with HyperThreading at a
  	  cost of slightly increased overhead in some places. If unsure say
  	  N here.
  
  config SCHED_MC

  	def_bool y
  	prompt "Multi-core scheduler support"

  	depends on X86_HT

  	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. If unsure say N here.
  
  source "kernel/Kconfig.preempt"
  
  config X86_UP_APIC
  	bool "Local APIC support on uniprocessors"
  	depends on X86_32 && !SMP && !(X86_VISWS || X86_VOYAGER || X86_GENERICARCH)
  	help
  	  A local APIC (Advanced Programmable Interrupt Controller) is an
  	  integrated interrupt controller in the CPU. If you have a single-CPU
  	  system which has a processor with a local APIC, you can say Y here to
  	  enable and use it. If you say Y here even though your machine doesn't
  	  have a local APIC, then the kernel will still run with no slowdown at
  	  all. The local APIC supports CPU-generated self-interrupts (timer,
  	  performance counters), and the NMI watchdog which detects hard
  	  lockups.
  
  config X86_UP_IOAPIC
  	bool "IO-APIC support on uniprocessors"
  	depends on X86_UP_APIC
  	help
  	  An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
  	  SMP-capable replacement for PC-style interrupt controllers. Most
  	  SMP systems and many recent uniprocessor systems have one.
  
  	  If you have a single-CPU system with an IO-APIC, you can say Y here
  	  to use it. If you say Y here even though your machine doesn't have
  	  an IO-APIC, then the kernel will still run with no slowdown at all.
  
  config X86_LOCAL_APIC

  	def_bool y

  	depends on X86_64 || (X86_32 && (X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH))

  
  config X86_IO_APIC

  	def_bool y

  	depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH))

  
  config X86_VISWS_APIC

  	def_bool y

  	depends on X86_32 && X86_VISWS

  
  config X86_MCE
  	bool "Machine Check Exception"
  	depends on !X86_VOYAGER
  	---help---
  	  Machine Check Exception support allows the processor to notify the
  	  kernel if it detects a problem (e.g. overheating, component failure).
  	  The action the kernel takes depends on the severity of the problem,
  	  ranging from a warning message on the console, to halting the machine.
  	  Your processor must be a Pentium or newer to support this - check the
  	  flags in /proc/cpuinfo for mce.  Note that some older Pentium systems
  	  have a design flaw which leads to false MCE events - hence MCE is
  	  disabled on all P5 processors, unless explicitly enabled with "mce"
  	  as a boot argument.  Similarly, if MCE is built in and creates a
  	  problem on some new non-standard machine, you can boot with "nomce"
  	  to disable it.  MCE support simply ignores non-MCE processors like
  	  the 386 and 486, so nearly everyone can say Y here.
  
  config X86_MCE_INTEL

  	def_bool y
  	prompt "Intel MCE features"

  	depends on X86_64 && X86_MCE && X86_LOCAL_APIC

  	help
  	   Additional support for intel specific MCE features such as
  	   the thermal monitor.
  
  config X86_MCE_AMD

  	def_bool y
  	prompt "AMD MCE features"

  	depends on X86_64 && X86_MCE && X86_LOCAL_APIC

  	help
  	   Additional support for AMD specific MCE features such as
  	   the DRAM Error Threshold.
  
  config X86_MCE_NONFATAL
  	tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
  	depends on X86_32 && X86_MCE
  	help
  	  Enabling this feature starts a timer that triggers every 5 seconds which
  	  will look at the machine check registers to see if anything happened.
  	  Non-fatal problems automatically get corrected (but still logged).
  	  Disable this if you don't want to see these messages.
  	  Seeing the messages this option prints out may be indicative of dying
  	  or out-of-spec (ie, overclocked) hardware.
  	  This option only does something on certain CPUs.
  	  (AMD Athlon/Duron and Intel Pentium 4)
  
  config X86_MCE_P4THERMAL
  	bool "check for P4 thermal throttling interrupt."
  	depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS
  	help
  	  Enabling this feature will cause a message to be printed when the P4
  	  enters thermal throttling.
  
  config VM86
  	bool "Enable VM86 support" if EMBEDDED
  	default y
  	depends on X86_32
  	help
            This option is required by programs like DOSEMU to run 16-bit legacy
  	  code on X86 processors. It also may be needed by software like
            XFree86 to initialize some video cards via BIOS. Disabling this
            option saves about 6k.
  
  config TOSHIBA
  	tristate "Toshiba Laptop support"
  	depends on X86_32
  	---help---
  	  This adds a driver to safely access the System Management Mode of
  	  the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
  	  not work on models with a Phoenix BIOS. The System Management Mode
  	  is used to set the BIOS and power saving options on Toshiba portables.
  
  	  For information on utilities to make use of this driver see the
  	  Toshiba Linux utilities web site at:
  	  <http://www.buzzard.org.uk/toshiba/>.
  
  	  Say Y if you intend to run this kernel on a Toshiba portable.
  	  Say N otherwise.
  
  config I8K
  	tristate "Dell laptop support"

  	---help---
  	  This adds a driver to safely access the System Management Mode
  	  of the CPU on the Dell Inspiron 8000. The System Management Mode
  	  is used to read cpu temperature and cooling fan status and to
  	  control the fans on the I8K portables.
  
  	  This driver has been tested only on the Inspiron 8000 but it may
  	  also work with other Dell laptops. You can force loading on other
  	  models by passing the parameter `force=1' to the module. Use at
  	  your own risk.
  
  	  For information on utilities to make use of this driver see the
  	  I8K Linux utilities web site at:
  	  <http://people.debian.org/~dz/i8k/>
  
  	  Say Y if you intend to run this kernel on a Dell Inspiron 8000.
  	  Say N otherwise.
  
  config X86_REBOOTFIXUPS

  	def_bool n
  	prompt "Enable X86 board specific fixups for reboot"

  	depends on X86_32 && X86

  	---help---
  	  This enables chipset and/or board specific fixups to be done
  	  in order to get reboot to work correctly. This is only needed on
  	  some combinations of hardware and BIOS. The symptom, for which
  	  this config is intended, is when reboot ends with a stalled/hung
  	  system.
  
  	  Currently, the only fixup is for the Geode machines using

  	  CS5530A and CS5536 chipsets and the RDC R-321x SoC.

  
  	  Say Y if you want to enable the fixup. Currently, it's safe to
  	  enable this option even if you don't need it.
  	  Say N otherwise.
  
  config MICROCODE
  	tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
  	select FW_LOADER
  	---help---
  	  If you say Y here, you will be able to update the microcode on
  	  Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
  	  Pentium III, Pentium 4, Xeon etc.  You will obviously need the
  	  actual microcode binary data itself which is not shipped with the
  	  Linux kernel.
  
  	  For latest news and information on obtaining all the required
  	  ingredients for this driver, check:
  	  <http://www.urbanmyth.org/microcode/>.
  
  	  To compile this driver as a module, choose M here: the
  	  module will be called microcode.
  
  config MICROCODE_OLD_INTERFACE

  	def_bool y

  	depends on MICROCODE

  
  config X86_MSR
  	tristate "/dev/cpu/*/msr - Model-specific register support"
  	help
  	  This device gives privileged processes access to the x86
  	  Model-Specific Registers (MSRs).  It is a character device with
  	  major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
  	  MSR accesses are directed to a specific CPU on multi-processor
  	  systems.
  
  config X86_CPUID
  	tristate "/dev/cpu/*/cpuid - CPU information support"
  	help
  	  This device gives processes access to the x86 CPUID instruction to
  	  be executed on a specific processor.  It is a character device
  	  with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
  	  /dev/cpu/31/cpuid.
  
  choice
  	prompt "High Memory Support"
  	default HIGHMEM4G if !X86_NUMAQ
  	default HIGHMEM64G if X86_NUMAQ
  	depends on X86_32
  
  config NOHIGHMEM
  	bool "off"
  	depends on !X86_NUMAQ
  	---help---
  	  Linux can use up to 64 Gigabytes of physical memory on x86 systems.
  	  However, the address space of 32-bit x86 processors is only 4
  	  Gigabytes large. That means that, if you have a large amount of
  	  physical memory, not all of it can be "permanently mapped" by the
  	  kernel. The physical memory that's not permanently mapped is called
  	  "high memory".
  
  	  If you are compiling a kernel which will never run on a machine with
  	  more than 1 Gigabyte total physical RAM, answer "off" here (default
  	  choice and suitable for most users). This will result in a "3GB/1GB"
  	  split: 3GB are mapped so that each process sees a 3GB virtual memory
  	  space and the remaining part of the 4GB virtual memory space is used
  	  by the kernel to permanently map as much physical memory as
  	  possible.
  
  	  If the machine has between 1 and 4 Gigabytes physical RAM, then
  	  answer "4GB" here.
  
  	  If more than 4 Gigabytes is used then answer "64GB" here. This
  	  selection turns Intel PAE (Physical Address Extension) mode on.
  	  PAE implements 3-level paging on IA32 processors. PAE is fully
  	  supported by Linux, PAE mode is implemented on all recent Intel
  	  processors (Pentium Pro and better). NOTE: If you say "64GB" here,
  	  then the kernel will not boot on CPUs that don't support PAE!
  
  	  The actual amount of total physical memory will either be
  	  auto detected or can be forced by using a kernel command line option
  	  such as "mem=256M". (Try "man bootparam" or see the documentation of
  	  your boot loader (lilo or loadlin) about how to pass options to the
  	  kernel at boot time.)
  
  	  If unsure, say "off".
  
  config HIGHMEM4G
  	bool "4GB"
  	depends on !X86_NUMAQ
  	help
  	  Select this if you have a 32-bit processor and between 1 and 4
  	  gigabytes of physical RAM.
  
  config HIGHMEM64G
  	bool "64GB"
  	depends on !M386 && !M486
  	select X86_PAE
  	help
  	  Select this if you have a 32-bit processor and more than 4
  	  gigabytes of physical RAM.
  
  endchoice
  
  choice
  	depends on EXPERIMENTAL
  	prompt "Memory split" if EMBEDDED
  	default VMSPLIT_3G
  	depends on X86_32
  	help
  	  Select the desired split between kernel and user memory.
  
  	  If the address range available to the kernel is less than the
  	  physical memory installed, the remaining memory will be available
  	  as "high memory". Accessing high memory is a little more costly
  	  than low memory, as it needs to be mapped into the kernel first.
  	  Note that increasing the kernel address space limits the range
  	  available to user programs, making the address space there
  	  tighter.  Selecting anything other than the default 3G/1G split
  	  will also likely make your kernel incompatible with binary-only
  	  kernel modules.
  
  	  If you are not absolutely sure what you are doing, leave this
  	  option alone!
  
  	config VMSPLIT_3G
  		bool "3G/1G user/kernel split"
  	config VMSPLIT_3G_OPT
  		depends on !X86_PAE
  		bool "3G/1G user/kernel split (for full 1G low memory)"
  	config VMSPLIT_2G
  		bool "2G/2G user/kernel split"
  	config VMSPLIT_2G_OPT
  		depends on !X86_PAE
  		bool "2G/2G user/kernel split (for full 2G low memory)"
  	config VMSPLIT_1G
  		bool "1G/3G user/kernel split"
  endchoice
  
  config PAGE_OFFSET
  	hex
  	default 0xB0000000 if VMSPLIT_3G_OPT
  	default 0x80000000 if VMSPLIT_2G
  	default 0x78000000 if VMSPLIT_2G_OPT
  	default 0x40000000 if VMSPLIT_1G
  	default 0xC0000000
  	depends on X86_32
  
  config HIGHMEM

  	def_bool y

  	depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)

  
  config X86_PAE

  	def_bool n
  	prompt "PAE (Physical Address Extension) Support"

  	depends on X86_32 && !HIGHMEM4G
  	select RESOURCES_64BIT
  	help
  	  PAE is required for NX support, and furthermore enables
  	  larger swapspace support for non-overcommit purposes. It
  	  has the cost of more pagetable lookup overhead, and also
  	  consumes more pagetable space per process.
  
  # Common NUMA Features
  config NUMA
  	bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
  	depends on SMP
  	depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI) && EXPERIMENTAL)
  	default n if X86_PC
  	default y if (X86_NUMAQ || X86_SUMMIT)
  	help
  	  Enable NUMA (Non Uniform Memory Access) support.
  	  The kernel will try to allocate memory used by a CPU on the
  	  local memory controller of the CPU and add some more
  	  NUMA awareness to the kernel.
  
  	  For i386 this is currently highly experimental and should be only
  	  used for kernel development. It might also cause boot failures.
  	  For x86_64 this is recommended on all multiprocessor Opteron systems.
  	  If the system is EM64T, you should say N unless your system is
  	  EM64T NUMA.
  
  comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
  	depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
  
  config K8_NUMA

  	def_bool y
  	prompt "Old style AMD Opteron NUMA detection"
  	depends on X86_64 && NUMA && PCI
  	help

  	 Enable K8 NUMA node topology detection.  You should say Y here if
  	 you have a multi processor AMD K8 system. This uses an old
  	 method to read the NUMA configuration directly from the builtin
  	 Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
  	 instead, which also takes priority if both are compiled in.
  
  config X86_64_ACPI_NUMA

  	def_bool y
  	prompt "ACPI NUMA detection"

  	depends on X86_64 && NUMA && ACPI && PCI
  	select ACPI_NUMA

  	help
  	  Enable ACPI SRAT based node topology detection.

  # 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.
  config NODES_SPAN_OTHER_NODES
  	def_bool y
  	depends on X86_64_ACPI_NUMA

  config NUMA_EMU
  	bool "NUMA emulation"
  	depends on X86_64 && NUMA
  	help
  	  Enable NUMA emulation. A flat machine will be split
  	  into virtual nodes when booted with "numa=fake=N", where N is the
  	  number of nodes. This is only useful for debugging.
  
  config NODES_SHIFT

  	int "Max num nodes shift(1-15)"

  	range 1 15  if X86_64

  	default "6" if X86_64
  	default "4" if X86_NUMAQ
  	default "3"
  	depends on NEED_MULTIPLE_NODES
  
  config HAVE_ARCH_BOOTMEM_NODE

  	def_bool y

  	depends on X86_32 && NUMA

  
  config ARCH_HAVE_MEMORY_PRESENT

  	def_bool y

  	depends on X86_32 && DISCONTIGMEM

  
  config NEED_NODE_MEMMAP_SIZE

  	def_bool y

  	depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)

  
  config HAVE_ARCH_ALLOC_REMAP

  	def_bool y

  	depends on X86_32 && NUMA

  
  config ARCH_FLATMEM_ENABLE
  	def_bool y

  	depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && X86_PC && !NUMA

  
  config ARCH_DISCONTIGMEM_ENABLE
  	def_bool y

  	depends on NUMA && X86_32

  
  config ARCH_DISCONTIGMEM_DEFAULT
  	def_bool y

  	depends on NUMA && X86_32
  
  config ARCH_SPARSEMEM_DEFAULT
  	def_bool y
  	depends on X86_64

  
  config ARCH_SPARSEMEM_ENABLE
  	def_bool y

  	depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC)

  	select SPARSEMEM_STATIC if X86_32
  	select SPARSEMEM_VMEMMAP_ENABLE if X86_64
  
  config ARCH_SELECT_MEMORY_MODEL
  	def_bool y

  	depends on ARCH_SPARSEMEM_ENABLE

  
  config ARCH_MEMORY_PROBE
  	def_bool X86_64
  	depends on MEMORY_HOTPLUG
  
  source "mm/Kconfig"
  
  config HIGHPTE
  	bool "Allocate 3rd-level pagetables from highmem"
  	depends on X86_32 && (HIGHMEM4G || HIGHMEM64G)
  	help
  	  The VM uses one page table entry for each page of physical memory.
  	  For systems with a lot of RAM, this can be wasteful of precious
  	  low memory.  Setting this option will put user-space page table
  	  entries in high memory.
  
  config MATH_EMULATION
  	bool
  	prompt "Math emulation" if X86_32
  	---help---
  	  Linux can emulate a math coprocessor (used for floating point
  	  operations) if you don't have one. 486DX and Pentium processors have
  	  a math coprocessor built in, 486SX and 386 do not, unless you added
  	  a 487DX or 387, respectively. (The messages during boot time can
  	  give you some hints here ["man dmesg"].) Everyone needs either a
  	  coprocessor or this emulation.
  
  	  If you don't have a math coprocessor, you need to say Y here; if you
  	  say Y here even though you have a coprocessor, the coprocessor will
  	  be used nevertheless. (This behavior can be changed with the kernel
  	  command line option "no387", which comes handy if your coprocessor
  	  is broken. Try "man bootparam" or see the documentation of your boot
  	  loader (lilo or loadlin) about how to pass options to the kernel at
  	  boot time.) This means that it is a good idea to say Y here if you
  	  intend to use this kernel on different machines.
  
  	  More information about the internals of the Linux math coprocessor
  	  emulation can be found in <file:arch/x86/math-emu/README>.
  
  	  If you are not sure, say Y; apart from resulting in a 66 KB bigger
  	  kernel, it won't hurt.
  
  config MTRR
  	bool "MTRR (Memory Type Range Register) support"
  	---help---
  	  On Intel P6 family processors (Pentium Pro, Pentium II and later)
  	  the Memory Type Range Registers (MTRRs) may be used to control
  	  processor access to memory ranges. This is most useful if you have
  	  a video (VGA) card on a PCI or AGP bus. Enabling write-combining
  	  allows bus write transfers to be combined into a larger transfer
  	  before bursting over the PCI/AGP bus. This can increase performance
  	  of image write operations 2.5 times or more. Saying Y here creates a
  	  /proc/mtrr file which may be used to manipulate your processor's
  	  MTRRs. Typically the X server should use this.
  
  	  This code has a reasonably generic interface so that similar
  	  control registers on other processors can be easily supported
  	  as well:
  
  	  The Cyrix 6x86, 6x86MX and M II processors have Address Range
  	  Registers (ARRs) which provide a similar functionality to MTRRs. For
  	  these, the ARRs are used to emulate the MTRRs.
  	  The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
  	  MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
  	  write-combining. All of these processors are supported by this code
  	  and it makes sense to say Y here if you have one of them.
  
  	  Saying Y here also fixes a problem with buggy SMP BIOSes which only
  	  set the MTRRs for the boot CPU and not for the secondary CPUs. This
  	  can lead to all sorts of problems, so it's good to say Y here.
  
  	  You can safely say Y even if your machine doesn't have MTRRs, you'll
  	  just add about 9 KB to your kernel.
  
  	  See <file:Documentation/mtrr.txt> for more information.

  config X86_PAT

  	bool

  	prompt "x86 PAT support"

  	depends on MTRR

  	help
  	  Use PAT attributes to setup page level cache control.

  	  PATs are the modern equivalents of MTRRs and are much more
  	  flexible than MTRRs.
  
  	  Say N here if you see bootup problems (boot crash, boot hang,

  	  spontaneous reboots) or a non-working video driver.

  
  	  If unsure, say Y.

  config EFI

  	def_bool n

  	prompt "EFI runtime service support"

  	depends on ACPI

  	---help---

  	This enables the kernel to use EFI runtime services that are

  	available (such as the EFI variable services).

  	This option is only useful on systems that have EFI firmware.
    	In addition, you should use the latest ELILO loader available
    	at <http://elilo.sourceforge.net> in order to take advantage
    	of EFI runtime services. However, even with this option, the
    	resultant kernel should continue to boot on existing non-EFI
    	platforms.

  
  config IRQBALANCE

  	def_bool y
  	prompt "Enable kernel irq balancing"

  	depends on X86_32 && SMP && X86_IO_APIC

  	help
  	  The default yes will allow the kernel to do irq load balancing.
  	  Saying no will keep the kernel from doing irq load balancing.

  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. Only embedded should say N here.
  
  config CC_STACKPROTECTOR
  	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"

  	depends on X86_64 && EXPERIMENTAL && BROKEN

  	help
           This option turns on the -fstack-protector GCC feature. This
  	  feature puts, at the beginning of critical functions, a canary
  	  value on the stack just before the return address, and validates
  	  the value just before actually returning.  Stack based buffer
  	  overflows (that need to overwrite this return address) now also
  	  overwrite the canary, which gets detected and the attack is then
  	  neutralized via a kernel panic.
  
  	  This feature requires gcc version 4.2 or above, or a distribution
  	  gcc with the feature backported. Older versions are automatically
  	  detected and for those versions, this configuration option is ignored.
  
  config CC_STACKPROTECTOR_ALL
  	bool "Use stack-protector for all functions"
  	depends on CC_STACKPROTECTOR
  	help
  	  Normally, GCC only inserts the canary value protection for
  	  functions that use large-ish on-stack buffers. By enabling
  	  this option, GCC will be asked to do this for ALL functions.
  
  source kernel/Kconfig.hz
  
  config KEXEC
  	bool "kexec system call"

  	depends on X86_BIOS_REBOOT

  	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 it is independent of the system firmware.   And like a reboot
  	  you can start any kernel with it, not just Linux.
  
  	  The name comes from the similarity to the exec system call.
  
  	  It is an ongoing process to be certain the hardware in a machine
  	  is properly shutdown, so do not be surprised if this code does not
  	  initially work for you.  It may help to enable device hotplugging
  	  support.  As of this writing the exact hardware interface is
  	  strongly in flux, so no good recommendation can be made.
  
  config CRASH_DUMP
  	bool "kernel crash dumps (EXPERIMENTAL)"
  	depends on EXPERIMENTAL
  	depends on X86_64 || (X86_32 && HIGHMEM)
  	help
  	  Generate crash dump after being started by kexec.
  	  This should be normally only set in special crash dump kernels
  	  which are loaded in the main kernel with kexec-tools into
  	  a specially reserved region and then later executed after
  	  a crash by kdump/kexec. The crash dump kernel must be compiled
  	  to a memory address not used by the main kernel or BIOS using
  	  PHYSICAL_START, or it must be built as a relocatable image
  	  (CONFIG_RELOCATABLE=y).
  	  For more details see Documentation/kdump/kdump.txt
  
  config PHYSICAL_START
  	hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
  	default "0x1000000" if X86_NUMAQ
  	default "0x200000" if X86_64
  	default "0x100000"
  	help
  	  This gives the physical address where the kernel is loaded.
  
  	  If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
  	  bzImage will decompress itself to above physical address and
  	  run from there. Otherwise, bzImage will run from the address where
  	  it has been loaded by the boot loader and will ignore above physical
  	  address.
  
  	  In normal kdump cases one does not have to set/change this option
  	  as now bzImage can be compiled as a completely relocatable image
  	  (CONFIG_RELOCATABLE=y) and be used to load and run from a different
  	  address. This option is mainly useful for the folks who don't want
  	  to use a bzImage for capturing the crash dump and want to use a
  	  vmlinux instead. vmlinux is not relocatable hence a kernel needs
  	  to be specifically compiled to run from a specific memory area
  	  (normally a reserved region) and this option comes handy.
  
  	  So if you are using bzImage for capturing the crash dump, leave
  	  the value here unchanged to 0x100000 and set CONFIG_RELOCATABLE=y.
  	  Otherwise if you plan to use vmlinux for capturing the crash dump
  	  change this value to start of the reserved region (Typically 16MB
  	  0x1000000). In other words, it can be set based on the "X" value as
  	  specified in the "crashkernel=YM@XM" command line boot parameter
  	  passed to the panic-ed kernel. Typically this parameter is set as
  	  crashkernel=64M@16M. Please take a look at
  	  Documentation/kdump/kdump.txt for more details about crash dumps.
  
  	  Usage of bzImage for capturing the crash dump is recommended as
  	  one does not have to build two kernels. Same kernel can be used
  	  as production kernel and capture kernel. Above option should have
  	  gone away after relocatable bzImage support is introduced. But it
  	  is present because there are users out there who continue to use
  	  vmlinux for dump capture. This option should go away down the
  	  line.
  
  	  Don't change this unless you know what you are doing.
  
  config RELOCATABLE
  	bool "Build a relocatable kernel (EXPERIMENTAL)"
  	depends on EXPERIMENTAL
  	help
  	  This builds a kernel image that retains relocation information
  	  so it can be loaded someplace besides the default 1MB.
  	  The relocations tend to make the kernel binary about 10% larger,
  	  but are discarded at runtime.
  
  	  One use is for the kexec on panic case where the recovery kernel
  	  must live at a different physical address than the primary
  	  kernel.
  
  	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  	  it has been loaded at and the compile time physical address
  	  (CONFIG_PHYSICAL_START) is ignored.
  
  config PHYSICAL_ALIGN
  	hex
  	prompt "Alignment value to which kernel should be aligned" if X86_32
  	default "0x100000" if X86_32
  	default "0x200000" if X86_64
  	range 0x2000 0x400000
  	help
  	  This value puts the alignment restrictions on physical address
  	  where kernel is loaded and run from. Kernel is compiled for an
  	  address which meets above alignment restriction.
  
  	  If bootloader loads the kernel at a non-aligned address and
  	  CONFIG_RELOCATABLE is set, kernel will move itself to nearest
  	  address aligned to above value and run from there.
  
  	  If bootloader loads the kernel at a non-aligned address and
  	  CONFIG_RELOCATABLE is not set, kernel will ignore the run time
  	  load address and decompress itself to the address it has been
  	  compiled for and run from there. The address for which kernel is
  	  compiled already meets above alignment restrictions. Hence the
  	  end result is that kernel runs from a physical address meeting
  	  above alignment restrictions.
  
  	  Don't change this unless you know what you are doing.
  
  config HOTPLUG_CPU
  	bool "Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)"
  	depends on SMP && HOTPLUG && EXPERIMENTAL && !X86_VOYAGER
  	---help---
  	  Say Y here to experiment with turning CPUs off and on, and to
  	  enable suspend on SMP systems. CPUs can be controlled through
  	  /sys/devices/system/cpu.
  	  Say N if you want to disable CPU hotplug and don't need to
  	  suspend.
  
  config COMPAT_VDSO

  	def_bool y
  	prompt "Compat VDSO support"

  	depends on X86_32 || IA32_EMULATION

  	help

  	  Map the 32-bit VDSO to the predictable old-style address too.

  	---help---
  	  Say N here if you are running a sufficiently recent glibc
  	  version (2.3.3 or later), to remove the high-mapped
  	  VDSO mapping and to exclusively use the randomized VDSO.
  
  	  If unsure, say Y.
  
  endmenu
  
  config ARCH_ENABLE_MEMORY_HOTPLUG
  	def_bool y
  	depends on X86_64 || (X86_32 && HIGHMEM)

  config HAVE_ARCH_EARLY_PFN_TO_NID
  	def_bool X86_64
  	depends on NUMA

  menu "Power management options"
  	depends on !X86_VOYAGER
  
  config ARCH_HIBERNATION_HEADER

  	def_bool y

  	depends on X86_64 && HIBERNATION

  
  source "kernel/power/Kconfig"
  
  source "drivers/acpi/Kconfig"

  config X86_APM_BOOT
  	bool
  	default y
  	depends on APM || APM_MODULE

  menuconfig APM
  	tristate "APM (Advanced Power Management) BIOS support"
  	depends on X86_32 && PM_SLEEP && !X86_VISWS
  	---help---
  	  APM is a BIOS specification for saving power using several different
  	  techniques. This is mostly useful for battery powered laptops with
  	  APM compliant BIOSes. If you say Y here, the system time will be
  	  reset after a RESUME operation, the /proc/apm device will provide
  	  battery status information, and user-space programs will receive
  	  notification of APM "events" (e.g. battery status change).
  
  	  If you select "Y" here, you can disable actual use of the APM
  	  BIOS by passing the "apm=off" option to the kernel at boot time.
  
  	  Note that the APM support is almost completely disabled for
  	  machines with more than one CPU.
  
  	  In order to use APM, you will need supporting software. For location

  	  and more information, read <file:Documentation/power/pm.txt> and the

  	  Battery Powered Linux mini-HOWTO, available from
  	  <http://www.tldp.org/docs.html#howto>.
  
  	  This driver does not spin down disk drives (see the hdparm(8)
  	  manpage ("man 8 hdparm") for that), and it doesn't turn off
  	  VESA-compliant "green" monitors.
  
  	  This driver does not support the TI 4000M TravelMate and the ACER
  	  486/DX4/75 because they don't have compliant BIOSes. Many "green"
  	  desktop machines also don't have compliant BIOSes, and this driver
  	  may cause those machines to panic during the boot phase.
  
  	  Generally, if you don't have a battery in your machine, there isn't
  	  much point in using this driver and you should say N. If you get
  	  random kernel OOPSes or reboots that don't seem to be related to
  	  anything, try disabling/enabling this option (or disabling/enabling
  	  APM in your BIOS).
  
  	  Some other things you should try when experiencing seemingly random,
  	  "weird" problems:
  
  	  1) make sure that you have enough swap space and that it is
  	  enabled.
  	  2) pass the "no-hlt" option to the kernel
  	  3) switch on floating point emulation in the kernel and pass
  	  the "no387" option to the kernel
  	  4) pass the "floppy=nodma" option to the kernel
  	  5) pass the "mem=4M" option to the kernel (thereby disabling
  	  all but the first 4 MB of RAM)
  	  6) make sure that the CPU is not over clocked.
  	  7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
  	  8) disable the cache from your BIOS settings
  	  9) install a fan for the video card or exchange video RAM
  	  10) install a better fan for the CPU
  	  11) exchange RAM chips
  	  12) exchange the motherboard.
  
  	  To compile this driver as a module, choose M here: the
  	  module will be called apm.
  
  if APM
  
  config APM_IGNORE_USER_SUSPEND
  	bool "Ignore USER SUSPEND"
  	help
  	  This option will ignore USER SUSPEND requests. On machines with a
  	  compliant APM BIOS, you want to say N. However, on the NEC Versa M
  	  series notebooks, it is necessary to say Y because of a BIOS bug.
  
  config APM_DO_ENABLE
  	bool "Enable PM at boot time"
  	---help---
  	  Enable APM features at boot time. From page 36 of the APM BIOS
  	  specification: "When disabled, the APM BIOS does not automatically
  	  power manage devices, enter the Standby State, enter the Suspend
  	  State, or take power saving steps in response to CPU Idle calls."
  	  This driver will make CPU Idle calls when Linux is idle (unless this
  	  feature is turned off -- see "Do CPU IDLE calls", below). This
  	  should always save battery power, but more complicated APM features
  	  will be dependent on your BIOS implementation. You may need to turn
  	  this option off if your computer hangs at boot time when using APM
  	  support, or if it beeps continuously instead of suspending. Turn
  	  this off if you have a NEC UltraLite Versa 33/C or a Toshiba
  	  T400CDT. This is off by default since most machines do fine without
  	  this feature.
  
  config APM_CPU_IDLE
  	bool "Make CPU Idle calls when idle"
  	help
  	  Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
  	  On some machines, this can activate improved power savings, such as
  	  a slowed CPU clock rate, when the machine is idle. These idle calls
  	  are made after the idle loop has run for some length of time (e.g.,
  	  333 mS). On some machines, this will cause a hang at boot time or
  	  whenever the CPU becomes idle. (On machines with more than one CPU,
  	  this option does nothing.)
  
  config APM_DISPLAY_BLANK
  	bool "Enable console blanking using APM"
  	help
  	  Enable console blanking using the APM. Some laptops can use this to
  	  turn off the LCD backlight when the screen blanker of the Linux
  	  virtual console blanks the screen. Note that this is only used by
  	  the virtual console screen blanker, and won't turn off the backlight
  	  when using the X Window system. This also doesn't have anything to
  	  do with your VESA-compliant power-saving monitor. Further, this
  	  option doesn't work for all laptops -- it might not turn off your
  	  backlight at all, or it might print a lot of errors to the console,
  	  especially if you are using gpm.
  
  config APM_ALLOW_INTS
  	bool "Allow interrupts during APM BIOS calls"
  	help
  	  Normally we disable external interrupts while we are making calls to
  	  the APM BIOS as a measure to lessen the effects of a badly behaving
  	  BIOS implementation.  The BIOS should reenable interrupts if it
  	  needs to.  Unfortunately, some BIOSes do not -- especially those in
  	  many of the newer IBM Thinkpads.  If you experience hangs when you
  	  suspend, try setting this to Y.  Otherwise, say N.
  
  config APM_REAL_MODE_POWER_OFF
  	bool "Use real mode APM BIOS call to power off"
  	help
  	  Use real mode APM BIOS calls to switch off the computer. This is
  	  a work-around for a number of buggy BIOSes. Switch this option on if
  	  your computer crashes instead of powering off properly.
  
  endif # APM
  
  source "arch/x86/kernel/cpu/cpufreq/Kconfig"
  
  source "drivers/cpuidle/Kconfig"
  
  endmenu
  
  
  menu "Bus options (PCI etc.)"
  
  config PCI

  	bool "PCI support" if !X86_VISWS && !X86_VSMP

  	depends on !X86_VOYAGER

  	default y

  	select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
  	help
  	  Find out whether you have a PCI motherboard. PCI is the name of a
  	  bus system, i.e. the way the CPU talks to the other stuff inside
  	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  	  VESA. If you have PCI, say Y, otherwise N.

  choice
  	prompt "PCI access mode"
  	depends on X86_32 && PCI && !X86_VISWS
  	default PCI_GOANY
  	---help---
  	  On PCI systems, the BIOS can be used to detect the PCI devices and
  	  determine their configuration. However, some old PCI motherboards
  	  have BIOS bugs and may crash if this is done. Also, some embedded
  	  PCI-based systems don't have any BIOS at all. Linux can also try to
  	  detect the PCI hardware directly without using the BIOS.
  
  	  With this option, you can specify how Linux should detect the
  	  PCI devices. If you choose "BIOS", the BIOS will be used,
  	  if you choose "Direct", the BIOS won't be used, and if you
  	  choose "MMConfig", then PCI Express MMCONFIG will be used.
  	  If you choose "Any", the kernel will try MMCONFIG, then the
  	  direct access method and falls back to the BIOS if that doesn't
  	  work. If unsure, go with the default, which is "Any".
  
  config PCI_GOBIOS
  	bool "BIOS"
  
  config PCI_GOMMCONFIG
  	bool "MMConfig"
  
  config PCI_GODIRECT
  	bool "Direct"
  
  config PCI_GOANY
  	bool "Any"

  config PCI_GOOLPC
  	bool "OLPC"
  	depends on OLPC

  endchoice
  
  config PCI_BIOS

  	def_bool y

  	depends on X86_32 && !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)

  
  # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
  config PCI_DIRECT

  	def_bool y

  	depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC) || X86_VISWS)

  
  config PCI_MMCONFIG

  	def_bool y

  	depends on X86_32 && PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)

  config PCI_OLPC
  	bool
  	depends on PCI && PCI_GOOLPC
  	default y

  config PCI_DOMAINS

  	def_bool y

  	depends on PCI

  
  config PCI_MMCONFIG
  	bool "Support mmconfig PCI config space access"
  	depends on X86_64 && PCI && ACPI
  
  config DMAR
  	bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
  	depends on X86_64 && PCI_MSI && ACPI && EXPERIMENTAL
  	help
  	  DMA remapping (DMAR) devices support enables independent address
  	  translations for Direct Memory Access (DMA) from devices.
  	  These DMA remapping devices are reported via ACPI tables
  	  and include PCI device scope covered by these DMA
  	  remapping devices.
  
  config DMAR_GFX_WA

  	def_bool y
  	prompt "Support for Graphics workaround"

  	depends on DMAR

  	help
  	 Current Graphics drivers tend to use physical address
  	 for DMA and avoid using DMA APIs. Setting this config
  	 option permits the IOMMU driver to set a unity map for
  	 all the OS-visible memory. Hence the driver can continue
  	 to use physical addresses for DMA.
  
  config DMAR_FLOPPY_WA

  	def_bool y

  	depends on DMAR

  	help
  	 Floppy disk drivers are know to bypass DMA API calls
  	 thereby failing to work when IOMMU is enabled. This
  	 workaround will setup a 1:1 mapping for the first
  	 16M to make floppy (an ISA device) work.
  
  source "drivers/pci/pcie/Kconfig"
  
  source "drivers/pci/Kconfig"
  
  # x86_64 have no ISA slots, but do have ISA-style DMA.
  config ISA_DMA_API

  	def_bool y

  
  if X86_32
  
  config ISA
  	bool "ISA support"
  	depends on !(X86_VOYAGER || X86_VISWS)
  	help
  	  Find out whether you have ISA slots on your motherboard.  ISA is the
  	  name of a bus system, i.e. the way the CPU talks to the other stuff
  	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
  	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
  	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
  
  config EISA
  	bool "EISA support"
  	depends on ISA
  	---help---
  	  The Extended Industry Standard Architecture (EISA) bus was
  	  developed as an open alternative to the IBM MicroChannel bus.
  
  	  The EISA bus provided some of the features of the IBM MicroChannel
  	  bus while maintaining backward compatibility with cards made for
  	  the older ISA bus.  The EISA bus saw limited use between 1988 and
  	  1995 when it was made obsolete by the PCI bus.
  
  	  Say Y here if you are building a kernel for an EISA-based machine.
  
  	  Otherwise, say N.
  
  source "drivers/eisa/Kconfig"
  
  config MCA
  	bool "MCA support" if !(X86_VISWS || X86_VOYAGER)
  	default y if X86_VOYAGER
  	help
  	  MicroChannel Architecture is found in some IBM PS/2 machines and
  	  laptops.  It is a bus system similar to PCI or ISA. See
  	  <file:Documentation/mca.txt> (and especially the web page given
  	  there) before attempting to build an MCA bus kernel.
  
  source "drivers/mca/Kconfig"
  
  config SCx200
  	tristate "NatSemi SCx200 support"
  	depends on !X86_VOYAGER
  	help
  	  This provides basic support for National Semiconductor's
  	  (now AMD's) Geode processors.  The driver probes for the
  	  PCI-IDs of several on-chip devices, so its a good dependency
  	  for other scx200_* drivers.
  
  	  If compiled as a module, the driver is named scx200.
  
  config SCx200HR_TIMER
  	tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
  	depends on SCx200 && GENERIC_TIME
  	default y
  	help
  	  This driver provides a clocksource built upon the on-chip
  	  27MHz high-resolution timer.  Its also a workaround for
  	  NSC Geode SC-1100's buggy TSC, which loses time when the
  	  processor goes idle (as is done by the scheduler).  The
  	  other workaround is idle=poll boot option.
  
  config GEODE_MFGPT_TIMER

  	def_bool y
  	prompt "Geode Multi-Function General Purpose Timer (MFGPT) events"

  	depends on MGEODE_LX && GENERIC_TIME && GENERIC_CLOCKEVENTS

  	help
  	  This driver provides a clock event source based on the MFGPT
  	  timer(s) in the CS5535 and CS5536 companion chip for the geode.
  	  MFGPTs have a better resolution and max interval than the
  	  generic PIT, and are suitable for use as high-res timers.

  config OLPC
  	bool "One Laptop Per Child support"
  	default n
  	help
  	  Add support for detecting the unique features of the OLPC
  	  XO hardware.

  endif # X86_32

  config K8_NB
  	def_bool y

  	depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA)))

  
  source "drivers/pcmcia/Kconfig"
  
  source "drivers/pci/hotplug/Kconfig"
  
  endmenu
  
  
  menu "Executable file formats / Emulations"
  
  source "fs/Kconfig.binfmt"
  
  config IA32_EMULATION
  	bool "IA32 Emulation"
  	depends on X86_64

  	select COMPAT_BINFMT_ELF

  	help
  	  Include code to run 32-bit programs under a 64-bit kernel. You should
  	  likely turn this on, unless you're 100% sure that you don't have any
  	  32-bit programs left.
  
  config IA32_AOUT
         tristate "IA32 a.out support"

         depends on IA32_EMULATION && ARCH_SUPPORTS_AOUT

         help
           Support old a.out binaries in the 32bit emulation.
  
  config COMPAT

  	def_bool y

  	depends on IA32_EMULATION

  
  config COMPAT_FOR_U64_ALIGNMENT
  	def_bool COMPAT
  	depends on X86_64
  
  config SYSVIPC_COMPAT

  	def_bool y

  	depends on X86_64 && COMPAT && SYSVIPC

  
  endmenu
  
  
  source "net/Kconfig"
  
  source "drivers/Kconfig"
  
  source "drivers/firmware/Kconfig"
  
  source "fs/Kconfig"

  source "arch/x86/Kconfig.debug"
  
  source "security/Kconfig"
  
  source "crypto/Kconfig"

  source "arch/x86/kvm/Kconfig"

  source "lib/Kconfig"