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Commit 506f1d07 authored by Sam Ravnborg's avatar Sam Ravnborg
Browse files

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: default avatarSam Ravnborg <sam@ravnborg.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
parent 8d5fffb9

arch/x86/Kconfig

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arch/x86/Kconfig.i386

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arch/x86/Kconfig.x86_64

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@@ -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"