1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
477 lines
12 KiB
Text
477 lines
12 KiB
Text
#
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# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.txt.
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#
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# Note: ISA is disabled and will hopefully never be enabled.
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# If you managed to buy an ISA x86-64 box you'll have to fix all the
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# ISA drivers you need yourself.
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#
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mainmenu "Linux Kernel Configuration"
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config X86_64
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bool
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default y
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help
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Port to the x86-64 architecture. x86-64 is a 64-bit extension to the
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classical 32-bit x86 architecture. For details see
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<http://www.x86-64.org/>.
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config 64BIT
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def_bool y
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config X86
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bool
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default y
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config MMU
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bool
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default y
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config ISA
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bool
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config SBUS
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bool
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config RWSEM_GENERIC_SPINLOCK
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bool
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default y
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config RWSEM_XCHGADD_ALGORITHM
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bool
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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config X86_CMPXCHG
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bool
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default y
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config EARLY_PRINTK
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bool
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default y
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config GENERIC_ISA_DMA
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bool
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default y
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config GENERIC_IOMAP
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bool
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default y
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source "init/Kconfig"
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menu "Processor type and features"
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choice
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prompt "Processor family"
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default MK8
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config MK8
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bool "AMD-Opteron/Athlon64"
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help
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Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs.
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config MPSC
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bool "Intel EM64T"
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help
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Optimize for Intel Pentium 4 and Xeon CPUs with Intel
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Extended Memory 64 Technology(EM64T). For details see
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<http://www.intel.com/technology/64bitextensions/>.
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config GENERIC_CPU
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bool "Generic-x86-64"
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help
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Generic x86-64 CPU.
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endchoice
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#
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# Define implied options from the CPU selection here
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#
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config X86_L1_CACHE_BYTES
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int
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default "128" if GENERIC_CPU || MPSC
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default "64" if MK8
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config X86_L1_CACHE_SHIFT
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int
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default "7" if GENERIC_CPU || MPSC
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default "6" if MK8
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config X86_TSC
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bool
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default y
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config X86_GOOD_APIC
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bool
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default y
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config MICROCODE
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tristate "/dev/cpu/microcode - Intel CPU microcode support"
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---help---
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If you say Y here the 'File systems' section, you will be
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able to update the microcode on Intel processors. You will
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obviously need the actual microcode binary data itself which is
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not shipped with the Linux kernel.
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For latest news and information on obtaining all the required
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ingredients for this driver, check:
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<http://www.urbanmyth.org/microcode/>.
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To compile this driver as a module, choose M here: the
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module will be called microcode.
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If you use modprobe or kmod you may also want to add the line
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'alias char-major-10-184 microcode' to your /etc/modules.conf file.
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config X86_MSR
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tristate "/dev/cpu/*/msr - Model-specific register support"
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help
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This device gives privileged processes access to the x86
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Model-Specific Registers (MSRs). It is a character device with
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major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
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MSR accesses are directed to a specific CPU on multi-processor
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systems.
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config X86_CPUID
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tristate "/dev/cpu/*/cpuid - CPU information support"
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help
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This device gives processes access to the x86 CPUID instruction to
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be executed on a specific processor. It is a character device
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with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
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/dev/cpu/31/cpuid.
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# disable it for opteron optimized builds because it pulls in ACPI_BOOT
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config X86_HT
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bool
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depends on SMP && !MK8
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default y
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config MATH_EMULATION
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bool
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config MCA
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bool
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config EISA
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bool
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config X86_IO_APIC
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bool
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default y
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config X86_LOCAL_APIC
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bool
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default y
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config MTRR
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bool "MTRR (Memory Type Range Register) support"
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---help---
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On Intel P6 family processors (Pentium Pro, Pentium II and later)
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the Memory Type Range Registers (MTRRs) may be used to control
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processor access to memory ranges. This is most useful if you have
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a video (VGA) card on a PCI or AGP bus. Enabling write-combining
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allows bus write transfers to be combined into a larger transfer
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before bursting over the PCI/AGP bus. This can increase performance
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of image write operations 2.5 times or more. Saying Y here creates a
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/proc/mtrr file which may be used to manipulate your processor's
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MTRRs. Typically the X server should use this.
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This code has a reasonably generic interface so that similar
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control registers on other processors can be easily supported
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as well.
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Saying Y here also fixes a problem with buggy SMP BIOSes which only
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set the MTRRs for the boot CPU and not for the secondary CPUs. This
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can lead to all sorts of problems, so it's good to say Y here.
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Just say Y here, all x86-64 machines support MTRRs.
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See <file:Documentation/mtrr.txt> for more information.
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config SMP
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bool "Symmetric multi-processing support"
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---help---
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This enables support for systems with more than one CPU. If you have
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a system with only one CPU, like most personal computers, say N. If
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you have a system with more than one CPU, say Y.
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If you say N here, the kernel will run on single and multiprocessor
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machines, but will use only one CPU of a multiprocessor machine. If
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you say Y here, the kernel will run on many, but not all,
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singleprocessor machines. On a singleprocessor machine, the kernel
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will run faster if you say N here.
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If you don't know what to do here, say N.
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config PREEMPT
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bool "Preemptible Kernel"
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---help---
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This option reduces the latency of the kernel when reacting to
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real-time or interactive events by allowing a low priority process to
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be preempted even if it is in kernel mode executing a system call.
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This allows applications to run more reliably even when the system is
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under load. On contrary it may also break your drivers and add
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priority inheritance problems to your system. Don't select it if
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you rely on a stable system or have slightly obscure hardware.
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It's also not very well tested on x86-64 currently.
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You have been warned.
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Say Y here if you are feeling brave and building a kernel for a
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desktop, embedded or real-time system. Say N if you are unsure.
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config PREEMPT_BKL
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bool "Preempt The Big Kernel Lock"
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depends on PREEMPT
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default y
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help
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This option reduces the latency of the kernel by making the
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big kernel lock preemptible.
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Say Y here if you are building a kernel for a desktop system.
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Say N if you are unsure.
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config SCHED_SMT
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bool "SMT (Hyperthreading) scheduler support"
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depends on SMP
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default n
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help
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SMT scheduler support improves the CPU scheduler's decision making
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when dealing with Intel Pentium 4 chips with HyperThreading at a
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cost of slightly increased overhead in some places. If unsure say
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N here.
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config K8_NUMA
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bool "K8 NUMA support"
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select NUMA
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depends on SMP
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help
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Enable NUMA (Non Unified Memory Architecture) support for
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AMD Opteron Multiprocessor systems. The kernel will try to allocate
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memory used by a CPU on the local memory controller of the CPU
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and add some more NUMA awareness to the kernel.
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This code is recommended on all multiprocessor Opteron systems
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and normally doesn't hurt on others.
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config NUMA_EMU
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bool "NUMA emulation support"
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select NUMA
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depends on SMP
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help
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Enable NUMA emulation. A flat machine will be split
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into virtual nodes when booted with "numa=fake=N", where N is the
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number of nodes. This is only useful for debugging.
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config DISCONTIGMEM
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bool
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depends on NUMA
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default y
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config NUMA
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bool
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default n
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config HAVE_DEC_LOCK
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bool
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depends on SMP
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default y
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config NR_CPUS
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int "Maximum number of CPUs (2-256)"
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range 2 256
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depends on SMP
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default "8"
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help
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This allows you to specify the maximum number of CPUs which this
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kernel will support. Current maximum is 256 CPUs due to
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APIC addressing limits. Less depending on the hardware.
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This is purely to save memory - each supported CPU requires
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memory in the static kernel configuration.
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config HPET_TIMER
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bool
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default y
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help
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Use the IA-PC HPET (High Precision Event Timer) to manage
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time in preference to the PIT and RTC, if a HPET is
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present. The HPET provides a stable time base on SMP
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systems, unlike the TSC, but it is more expensive to access,
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as it is off-chip. You can find the HPET spec at
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<http://www.intel.com/labs/platcomp/hpet/hpetspec.htm>.
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config HPET_EMULATE_RTC
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bool "Provide RTC interrupt"
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depends on HPET_TIMER && RTC=y
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config GART_IOMMU
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bool "IOMMU support"
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depends on PCI
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help
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Support the K8 IOMMU. Needed to run systems with more than 4GB of memory
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properly with 32-bit PCI devices that do not support DAC (Double Address
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Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter.
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Normally the kernel will take the right choice by itself.
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If unsure, say Y.
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# need this always enabled with GART_IOMMU for the VIA workaround
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config SWIOTLB
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bool
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depends on GART_IOMMU
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default y
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config DUMMY_IOMMU
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bool
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depends on !GART_IOMMU && !SWIOTLB
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default y
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help
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Don't use IOMMU code. This will cause problems when you have more than 4GB
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of memory and any 32-bit devices. Don't turn on unless you know what you
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are doing.
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config X86_MCE
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bool "Machine check support" if EMBEDDED
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default y
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help
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Include a machine check error handler to report hardware errors.
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This version will require the mcelog utility to decode some
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machine check error logs. See
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ftp://ftp.x86-64.org/pub/linux/tools/mcelog
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config X86_MCE_INTEL
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bool "Intel MCE features"
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depends on X86_MCE && X86_LOCAL_APIC
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default y
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help
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Additional support for intel specific MCE features such as
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the thermal monitor.
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config SECCOMP
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bool "Enable seccomp to safely compute untrusted bytecode"
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depends on PROC_FS
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default y
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help
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This kernel feature is useful for number crunching applications
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that may need to compute untrusted bytecode during their
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execution. By using pipes or other transports made available to
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the process as file descriptors supporting the read/write
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syscalls, it's possible to isolate those applications in
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their own address space using seccomp. Once seccomp is
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enabled via /proc/<pid>/seccomp, it cannot be disabled
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and the task is only allowed to execute a few safe syscalls
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defined by each seccomp mode.
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If unsure, say Y. Only embedded should say N here.
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endmenu
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#
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# Use the generic interrupt handling code in kernel/irq/:
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#
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config GENERIC_HARDIRQS
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bool
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default y
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config GENERIC_IRQ_PROBE
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bool
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default y
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menu "Power management options"
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source kernel/power/Kconfig
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source "drivers/acpi/Kconfig"
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source "arch/x86_64/kernel/cpufreq/Kconfig"
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endmenu
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menu "Bus options (PCI etc.)"
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config PCI
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bool "PCI support"
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# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
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config PCI_DIRECT
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bool
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depends on PCI
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default y
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config PCI_MMCONFIG
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bool "Support mmconfig PCI config space access"
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depends on PCI
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select ACPI_BOOT
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config UNORDERED_IO
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bool "Unordered IO mapping access"
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depends on EXPERIMENTAL
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help
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Use unordered stores to access IO memory mappings in device drivers.
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Still very experimental. When a driver works on IA64/ppc64/pa-risc it should
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work with this option, but it makes the drivers behave differently
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from i386. Requires that the driver writer used memory barriers
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properly.
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source "drivers/pci/pcie/Kconfig"
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source "drivers/pci/Kconfig"
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source "drivers/pcmcia/Kconfig"
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source "drivers/pci/hotplug/Kconfig"
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endmenu
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menu "Executable file formats / Emulations"
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source "fs/Kconfig.binfmt"
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config IA32_EMULATION
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bool "IA32 Emulation"
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help
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Include code to run 32-bit programs under a 64-bit kernel. You should likely
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turn this on, unless you're 100% sure that you don't have any 32-bit programs
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left.
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config IA32_AOUT
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bool "IA32 a.out support"
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depends on IA32_EMULATION
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help
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Support old a.out binaries in the 32bit emulation.
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config COMPAT
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bool
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depends on IA32_EMULATION
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default y
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config SYSVIPC_COMPAT
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bool
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depends on COMPAT && SYSVIPC
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default y
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config UID16
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bool
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depends on IA32_EMULATION
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default y
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endmenu
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source drivers/Kconfig
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source "drivers/firmware/Kconfig"
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source fs/Kconfig
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source "arch/x86_64/oprofile/Kconfig"
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source "arch/x86_64/Kconfig.debug"
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source "security/Kconfig"
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source "crypto/Kconfig"
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source "lib/Kconfig"
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