x86: move the rest of the menu's to Kconfig

With this patch we have all the Kconfig file shared between i386 and x86_64. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com>
author: Sam Ravnborg <sam@ravnborg.org> 2007-11-09 15:56:54 -0500
committer: Sam Ravnborg <sam@ravnborg.org> 2007-11-12 15:02:19 -0500
commit: 506f1d07b310815d11527d3360b09d79d0bd59f1 (patch)
tree: 3a2b1a7699916c0c9518db84d3cc060301ef5b81 /arch
parent: 8d5fffb928cd86a70823f66f8335fa41709ec109 (diff)
3 files changed, 1052 insertions, 1543 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d47b5a2e4a32..34517bf14ba4 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -151,7 +151,1059 @@ config X86_TRAMPOLINE
 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 the <file:Documentation/smp.txt>,
+          <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
+        select SMP if !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)"
+        select SMP
+        select NUMA
+        depends on X86_32
+        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_VSMP
+        bool "Support for ScaleMP vSMP"
+        depends on X86_64 && PCI
+         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
+        bool "Single-depth WCHAN output"
+        default y
+        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".
+config PARAVIRT
+        bool
+        depends on X86_32 && !(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.
+menuconfig PARAVIRT_GUEST
+        bool "Paravirtualized guest support"
+        depends on X86_32
+        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_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.
+source "arch/x86/lguest/Kconfig"
+endif
+config ACPI_SRAT
+        bool
+        default y
+        depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
+        select ACPI_NUMA
+config HAVE_ARCH_PARSE_SRAT
+       bool
+       default y
+       depends on ACPI_SRAT
+config X86_SUMMIT_NUMA
+        bool
+        default y
+        depends on X86_32 && NUMA && (X86_SUMMIT || X86_GENERICARCH)
+config X86_CYCLONE_TIMER
+        bool
+        default y
+        depends on X86_32 && X86_SUMMIT || X86_GENERICARCH
+config ES7000_CLUSTERED_APIC
+        bool
+        default y
+        depends on SMP && X86_ES7000 && MPENTIUMIII
+source "arch/x86/Kconfig.cpu"
+config HPET_TIMER
+        bool
+        prompt "HPET Timer Support" if X86_32
+        default X86_64
+        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
+        bool
+        depends on HPET_TIMER && RTC=y
+        default y
+# Mark as embedded because too many people got it wrong.
+# The code disables itself when not needed.
+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
+        bool "Should Calgary be enabled by default?"
+        default y
+        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 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_64 && SMP) || (X86_32 && 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
+        bool "Multi-core scheduler support"
+        depends on (X86_64 && SMP) || (X86_32 && X86_HT)
+        default y
+        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
+        bool
+        depends on X86_64 || (X86_32 && (X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH))
+        default y
+config X86_IO_APIC
+        bool
+        depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH))
+        default y
+config X86_VISWS_APIC
+        bool
+        depends on X86_32 && X86_VISWS
+        default y
+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
+        bool "Intel MCE features"
+        depends on X86_64 && X86_MCE && X86_LOCAL_APIC
+        default y
+        help
+           Additional support for intel specific MCE features such as
+           the thermal monitor.
+config X86_MCE_AMD
+        bool "AMD MCE features"
+        depends on X86_64 && X86_MCE && X86_LOCAL_APIC
+        default y
+        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"
+        depends on X86_32
+        ---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
+        bool "Enable X86 board specific fixups for reboot"
+        depends on X86_32 && X86
+        default n
+        ---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.
+          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
+        bool
+        depends on MICROCODE
+        default y
+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
+        bool
+        depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
+        default y
+config X86_PAE
+        bool "PAE (Physical Address Extension) Support"
+        default n
+        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
+       bool "Old style AMD Opteron NUMA detection"
+       depends on X86_64 && NUMA && PCI
+       default y
+       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
+        bool "ACPI NUMA detection"
+        depends on X86_64 && NUMA && ACPI && PCI
+        select ACPI_NUMA
+        default y
+        help
+          Enable ACPI SRAT based node topology detection.
+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
+        default "6" if X86_64
+        default "4" if X86_NUMAQ
+        default "3"
+        depends on NEED_MULTIPLE_NODES
+config HAVE_ARCH_BOOTMEM_NODE
+        bool
+        depends on X86_32 && NUMA
+        default y
+config ARCH_HAVE_MEMORY_PRESENT
+        bool
+        depends on X86_32 && DISCONTIGMEM
+        default y
+config NEED_NODE_MEMMAP_SIZE
+        bool
+        depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
+        default y
+config HAVE_ARCH_ALLOC_REMAP
+        bool
+        depends on X86_32 && NUMA
+        default y
+config ARCH_FLATMEM_ENABLE
+        def_bool y
+        depends on (X86_32 && ARCH_SELECT_MEMORY_MODEL && X86_PC) || (X86_64 && !NUMA)
+config ARCH_DISCONTIGMEM_ENABLE
+        def_bool y
+        depends on NUMA
+config ARCH_DISCONTIGMEM_DEFAULT
+        def_bool y
+        depends on NUMA
+config ARCH_SPARSEMEM_ENABLE
+        def_bool y
+        depends on NUMA || (EXPERIMENTAL && (X86_PC || X86_64))
+        select SPARSEMEM_STATIC if X86_32
+        select SPARSEMEM_VMEMMAP_ENABLE if X86_64
+config ARCH_SELECT_MEMORY_MODEL
+        def_bool y
+        depends on X86_32 && 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 EFI
+        bool "Boot from EFI support"
+        depends on X86_32 && ACPI
+        default n
+        ---help---
+        This enables the kernel to boot on EFI platforms using
+        system configuration information passed to it from the firmware.
+        This also enables the kernel to use any EFI runtime services that are
+        available (such as the EFI variable services).
+        This option is only useful on systems that have EFI firmware
+        and will result in a kernel image that is ~8k larger.  In addition,
+        you must use the latest ELILO loader available at
+        <http://elilo.sourceforge.net> in order to take advantage of
+        kernel initialization using EFI information (neither GRUB nor LILO know
+        anything about EFI).  However, even with this option, the resultant
+        kernel should continue to boot on existing non-EFI platforms.
+config IRQBALANCE
+        bool "Enable kernel irq balancing"
+        depends on X86_32 && SMP && X86_IO_APIC
+        default y
+        help
+          The default yes will allow the kernel to do irq load balancing.
+          Saying no will keep the kernel from doing irq load balancing.
+# turning this on wastes a bunch of space.
+# Summit needs it only when NUMA is on
+config BOOT_IOREMAP
+        bool
+        depends on X86_32 && (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
+        default y
+config SECCOMP
+        bool "Enable seccomp to safely compute untrusted bytecode"
+        depends on PROC_FS
+        default y
+        help
+          This kernel feature is useful for number crunching applications
+          that may need to compute untrusted bytecode during their
+          execution. By using pipes or other transports made available to
+          the process as file descriptors supporting the read/write
+          syscalls, it's possible to isolate those applications in
+          their own address space using seccomp. Once seccomp is
+          enabled via /proc/<pid>/seccomp, it cannot be disabled
+          and the task is only allowed to execute a few safe syscalls
+          defined by each seccomp mode.
+          If unsure, say Y. Only embedded should say N here.
+config CC_STACKPROTECTOR
+        bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
+        depends on X86_64 && EXPERIMENTAL
+        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"
+        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
+        bool "Compat VDSO support"
+        default y
+        depends on X86_32
+        help
+          Map the 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 MEMORY_HOTPLUG_RESERVE
+        def_bool X86_64
+        depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
+config HAVE_ARCH_EARLY_PFN_TO_NID
+        def_bool X86_64
+        depends on NUMA
+config OUT_OF_LINE_PFN_TO_PAGE
+        def_bool X86_64
+        depends on DISCONTIGMEM
 menu "Power management options"
        depends on !X86_VOYAGER
diff --git a/arch/x86/Kconfig.i386 b/arch/x86/Kconfig.i386
index b8b462a91dc7..7b8dc2604d57 100644
--- a/arch/x86/Kconfig.i386
+++ b/arch/x86/Kconfig.i386
@@ -14,1058 +14,5 @@ config X86_32
          486, 586, Pentiums, and various instruction-set-compatible chips by
          AMD, Cyrix, and others.
-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 the <file:Documentation/smp.txt>,
-          <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
-        select SMP if !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)"
-        select SMP
-        select NUMA
-        depends on X86_32
-        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_VSMP
-        bool "Support for ScaleMP vSMP"
-        depends on X86_64 && PCI
-         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
-        bool "Single-depth WCHAN output"
-        default y
-        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".
-config PARAVIRT
-        bool
-        depends on X86_32 && !(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.
-menuconfig PARAVIRT_GUEST
-        bool "Paravirtualized guest support"
-        depends on X86_32
-        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_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.
-source "arch/x86/lguest/Kconfig"
-endif
-config ACPI_SRAT
-        bool
-        default y
-        depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
-        select ACPI_NUMA
-config HAVE_ARCH_PARSE_SRAT
-       bool
-       default y
-       depends on ACPI_SRAT
-config X86_SUMMIT_NUMA
-        bool
-        default y
-        depends on X86_32 && NUMA && (X86_SUMMIT || X86_GENERICARCH)
-config X86_CYCLONE_TIMER
-        bool
-        default y
-        depends on X86_32 && X86_SUMMIT || X86_GENERICARCH
-config ES7000_CLUSTERED_APIC
-        bool
-        default y
-        depends on SMP && X86_ES7000 && MPENTIUMIII
-source "arch/x86/Kconfig.cpu"
-config HPET_TIMER
-        bool
-        prompt "HPET Timer Support" if X86_32
-        default X86_64
-        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
-        bool
-        depends on HPET_TIMER && RTC=y
-        default y
-# Mark as embedded because too many people got it wrong.
-# The code disables itself when not needed.
-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
-        bool "Should Calgary be enabled by default?"
-        default y
-        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 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_64 && SMP) || (X86_32 && 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
-        bool "Multi-core scheduler support"
-        depends on (X86_64 && SMP) || (X86_32 && X86_HT)
-        default y
-        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
-        bool
-        depends on X86_64 || (X86_32 && (X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH))
-        default y
-config X86_IO_APIC
-        bool
-        depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH))
-        default y
-config X86_VISWS_APIC
-        bool
-        depends on X86_32 && X86_VISWS
-        default y
-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
-        bool "Intel MCE features"
-        depends on X86_64 && X86_MCE && X86_LOCAL_APIC
-        default y
-        help
-           Additional support for intel specific MCE features such as
-           the thermal monitor.
-config X86_MCE_AMD
-        bool "AMD MCE features"
-        depends on X86_64 && X86_MCE && X86_LOCAL_APIC
-        default y
-        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"
-        depends on X86_32
-        ---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
-        bool "Enable X86 board specific fixups for reboot"
-        depends on X86_32 && X86
-        default n
-        ---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.
-          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
-        bool
-        depends on MICROCODE
-        default y
-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
-        bool
-        depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
-        default y
-config X86_PAE
-        bool "PAE (Physical Address Extension) Support"
-        default n
-        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
-       bool "Old style AMD Opteron NUMA detection"
-       depends on X86_64 && NUMA && PCI
-       default y
-       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
-        bool "ACPI NUMA detection"
-        depends on X86_64 && NUMA && ACPI && PCI
-        select ACPI_NUMA
-        default y
-        help
-          Enable ACPI SRAT based node topology detection.
-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
-        default "6" if X86_64
-        default "4" if X86_NUMAQ
-        default "3"
-        depends on NEED_MULTIPLE_NODES
-config HAVE_ARCH_BOOTMEM_NODE
-        bool
-        depends on X86_32 && NUMA
-        default y
-config ARCH_HAVE_MEMORY_PRESENT
-        bool
-        depends on X86_32 && DISCONTIGMEM
-        default y
-config NEED_NODE_MEMMAP_SIZE
-        bool
-        depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
-        default y
-config HAVE_ARCH_ALLOC_REMAP
-        bool
-        depends on X86_32 && NUMA
-        default y
-config ARCH_FLATMEM_ENABLE
-        def_bool y
-        depends on (X86_32 && ARCH_SELECT_MEMORY_MODEL && X86_PC) || (X86_64 && !NUMA)
-config ARCH_DISCONTIGMEM_ENABLE
-        def_bool y
-        depends on NUMA
-config ARCH_DISCONTIGMEM_DEFAULT
-        def_bool y
-        depends on NUMA
-config ARCH_SPARSEMEM_ENABLE
-        def_bool y
-        depends on NUMA || (EXPERIMENTAL && (X86_PC || X86_64))
-        select SPARSEMEM_STATIC if X86_32
-        select SPARSEMEM_VMEMMAP_ENABLE if X86_64
-config ARCH_SELECT_MEMORY_MODEL
-        def_bool y
-        depends on X86_32 && 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 EFI
-        bool "Boot from EFI support"
-        depends on X86_32 && ACPI
-        default n
-        ---help---
-        This enables the kernel to boot on EFI platforms using
-        system configuration information passed to it from the firmware.
-        This also enables the kernel to use any EFI runtime services that are
-        available (such as the EFI variable services).
-        This option is only useful on systems that have EFI firmware
-        and will result in a kernel image that is ~8k larger.  In addition,
-        you must use the latest ELILO loader available at
-        <http://elilo.sourceforge.net> in order to take advantage of
-        kernel initialization using EFI information (neither GRUB nor LILO know
-        anything about EFI).  However, even with this option, the resultant
-        kernel should continue to boot on existing non-EFI platforms.
-config IRQBALANCE
-        bool "Enable kernel irq balancing"
-        depends on X86_32 && SMP && X86_IO_APIC
-        default y
-        help
-          The default yes will allow the kernel to do irq load balancing.
-          Saying no will keep the kernel from doing irq load balancing.
-# turning this on wastes a bunch of space.
-# Summit needs it only when NUMA is on
-config BOOT_IOREMAP
-        bool
-        depends on X86_32 && (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
-        default y
-config SECCOMP
-        bool "Enable seccomp to safely compute untrusted bytecode"
-        depends on PROC_FS
-        default y
-        help
-          This kernel feature is useful for number crunching applications
-          that may need to compute untrusted bytecode during their
-          execution. By using pipes or other transports made available to
-          the process as file descriptors supporting the read/write
-          syscalls, it's possible to isolate those applications in
-          their own address space using seccomp. Once seccomp is
-          enabled via /proc/<pid>/seccomp, it cannot be disabled
-          and the task is only allowed to execute a few safe syscalls
-          defined by each seccomp mode.
-          If unsure, say Y. Only embedded should say N here.
-config CC_STACKPROTECTOR
-        bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
-        depends on X86_64 && EXPERIMENTAL
-        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"
-        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
-        bool "Compat VDSO support"
-        default y
-        depends on X86_32
-        help
-          Map the 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 MEMORY_HOTPLUG_RESERVE
-        def_bool X86_64
-        depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
-config HAVE_ARCH_EARLY_PFN_TO_NID
-        def_bool X86_64
-        depends on NUMA
-config OUT_OF_LINE_PFN_TO_PAGE
-        def_bool X86_64
-        depends on DISCONTIGMEM
 source "arch/x86/Kconfig"
diff --git a/arch/x86/Kconfig.x86_64 b/arch/x86/Kconfig.x86_64
index e441062472a8..b262aaec67cc 100644
--- a/arch/x86/Kconfig.x86_64
+++ b/arch/x86/Kconfig.x86_64
@@ -17,494 +17,4 @@ config X86_64
          classical 32-bit x86 architecture. For details see
          <http://www.x86-64.org/>.
-source "init/Kconfig"
-menu "Processor type and features"
-source "kernel/time/Kconfig"
-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_VSMP
-        bool "Support for ScaleMP vSMP"
-        depends on X86_64 && PCI
-         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
-source "arch/x86/Kconfig.cpu"
-config MICROCODE
-        tristate "/dev/cpu/microcode - Intel CPU microcode support"
-        select FW_LOADER
-        ---help---
-          If you say Y here the 'File systems' section, you will be
-          able to update the microcode on Intel processors. 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.
-          If you use modprobe or kmod you may also want to add the line
-          'alias char-major-10-184 microcode' to your /etc/modules.conf file.
-config MICROCODE_OLD_INTERFACE
-        bool
-        depends on MICROCODE
-        default y
-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.
-config MATH_EMULATION
-        bool
-config MCA
-        bool
-config EISA
-        bool
-config X86_IO_APIC
-        bool
-        default y
-config X86_LOCAL_APIC
-        bool
-        default y
-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.
-          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.
-          Just say Y here, all x86-64 machines support MTRRs.
-          See <file:Documentation/mtrr.txt> for more information.
-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.
-          If you don't know what to do here, say N.
-config SCHED_SMT
-        bool "SMT (Hyperthreading) scheduler support"
-        depends on SMP
-        default n
-        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
-        bool "Multi-core scheduler support"
-        depends on SMP
-        default y
-        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 NUMA
-       bool "Non Uniform Memory Access (NUMA) Support"
-       depends on SMP
-       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.
-         This code is recommended on all multiprocessor Opteron systems.
-         If the system is EM64T, you should say N unless your system is EM64T 
-         NUMA. 
-config K8_NUMA
-       bool "Old style AMD Opteron NUMA detection"
-       depends on X86_64 && NUMA && PCI
-       default y
-       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 NODES_SHIFT
-        int
-        default "6" if X86_64
-        depends on NEED_MULTIPLE_NODES
-# Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig.
-config X86_64_ACPI_NUMA
-       bool "ACPI NUMA detection"
-       depends on X86_64 && NUMA
-       select ACPI 
-        select PCI
-       select ACPI_NUMA
-       default y
-       help
-         Enable ACPI SRAT based node topology detection.
-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 ARCH_DISCONTIGMEM_ENABLE
-       bool
-       depends on NUMA
-       default y
-config ARCH_DISCONTIGMEM_DEFAULT
-        def_bool y
-        depends on NUMA
-config ARCH_SPARSEMEM_ENABLE
-        def_bool y
-        depends on (NUMA || EXPERIMENTAL)
-        select SPARSEMEM_VMEMMAP_ENABLE
-config ARCH_MEMORY_PROBE
-        def_bool X86_64
-        depends on MEMORY_HOTPLUG
-config ARCH_FLATMEM_ENABLE
-        def_bool y
-        depends on !NUMA
-source "mm/Kconfig"
-config MEMORY_HOTPLUG_RESERVE
-        def_bool X86_64
-        depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
-config HAVE_ARCH_EARLY_PFN_TO_NID
-        def_bool X86_64
-        depends on NUMA
-config OUT_OF_LINE_PFN_TO_PAGE
-        def_bool X86_64
-        depends on DISCONTIGMEM
-config NR_CPUS
-        int "Maximum number of CPUs (2-255)"
-        range 2 255
-        depends on SMP
-        default "8"
-        help
-          This allows you to specify the maximum number of CPUs which this
-          kernel will support. Current maximum is 255 CPUs due to
-          APIC addressing limits. Less depending on the hardware.
-          This is purely to save memory - each supported CPU requires
-          memory in the static kernel configuration.
-config PHYSICAL_ALIGN
-        hex
-        default "0x200000" if X86_64
-config HOTPLUG_CPU
-        bool "Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)"
-        depends on SMP && HOTPLUG && EXPERIMENTAL
-        help
-                Say Y here to experiment with turning CPUs off and on.  CPUs
-                can be controlled through /sys/devices/system/cpu/cpu#.
-                This is also required for suspend/hibernation on SMP systems.
-                Say N if you want to disable CPU hotplug and don't need to
-                suspend.
-config ARCH_ENABLE_MEMORY_HOTPLUG
-        def_bool y
-config HPET_TIMER
-        bool
-        default y
-        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.  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>.
-config HPET_EMULATE_RTC
-        bool
-        depends on HPET_TIMER && RTC=y
-        default y
-# Mark as embedded because too many people got it wrong.
-# The code disables itself when not needed.
-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
-        bool "Should Calgary be enabled by default?"
-        default y
-        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 X86_MCE
-        bool "Machine check support" if EMBEDDED
-        default y
-        help
-           Include a machine check error handler to report hardware errors.
-           This version will require the mcelog utility to decode some
-           machine check error logs. See
-           ftp://ftp.x86-64.org/pub/linux/tools/mcelog
-config X86_MCE_INTEL
-        bool "Intel MCE features"
-        depends on X86_64 && X86_MCE && X86_LOCAL_APIC
-        default y
-        help
-           Additional support for intel specific MCE features such as
-           the thermal monitor.
-config X86_MCE_AMD
-        bool "AMD MCE features"
-        depends on X86_64 && X86_MCE && X86_LOCAL_APIC
-        default y
-        help
-           Additional support for AMD specific MCE features such as
-           the DRAM Error Threshold.
-config KEXEC
-        bool "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 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
-        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 RELOCATABLE
-        bool "Build a relocatable kernel (EXPERIMENTAL)"
-        depends on EXPERIMENTAL
-        help
-          Builds a relocatable kernel. This enables loading and running
-          a kernel binary from a different physical address than it has
-          been compiled for.
-          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_START
-        hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
-        default "0x200000"
-        help
-          This gives the physical address where the kernel is loaded. It
-          should be aligned to 2MB boundary.
-          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.
-          So if you are using bzImage for capturing the crash dump, leave
-          the value here unchanged to 0x200000 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 advantageous as
-          one does not have to build two kernels. Same kernel can be used
-          as production kernel and capture kernel.
-          Don't change this unless you know what you are doing.
-config SECCOMP
-        bool "Enable seccomp to safely compute untrusted bytecode"
-        depends on PROC_FS
-        default y
-        help
-          This kernel feature is useful for number crunching applications
-          that may need to compute untrusted bytecode during their
-          execution. By using pipes or other transports made available to
-          the process as file descriptors supporting the read/write
-          syscalls, it's possible to isolate those applications in
-          their own address space using seccomp. Once seccomp is
-          enabled via /proc/<pid>/seccomp, it cannot be disabled
-          and the task is only allowed to execute a few safe syscalls
-          defined by each seccomp mode.
-          If unsure, say Y. Only embedded should say N here.
-config CC_STACKPROTECTOR
-        bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
-        depends on X86_64 && EXPERIMENTAL
-        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 K8_NB
-        def_bool X86_64
-        depends on AGP_AMD64 || GART_IOMMU || (PCI && NUMA)
-endmenu
 source "arch/x86/Kconfig"
author	Sam Ravnborg <sam@ravnborg.org>	2007-11-09 15:56:54 -0500
committer	Sam Ravnborg <sam@ravnborg.org>	2007-11-12 15:02:19 -0500
commit	506f1d07b310815d11527d3360b09d79d0bd59f1 (patch)
tree	3a2b1a7699916c0c9518db84d3cc060301ef5b81 /arch
parent	8d5fffb928cd86a70823f66f8335fa41709ec109 (diff)