forked from luck/tmp_suning_uos_patched
1edf777803
Improve Kconfig description of CONFIG_CRASH_DUMP. Previously it was too brief to be useful. Cc: vgoyal@in.ibm.com Cc: ebiederm@xmission.com Signed-off-by: Andi Kleen <ak@suse.de>
669 lines
17 KiB
Plaintext
669 lines
17 KiB
Plaintext
#
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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 LOCKDEP_SUPPORT
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bool
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default y
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config STACKTRACE_SUPPORT
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bool
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default y
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config SEMAPHORE_SLEEPERS
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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_HWEIGHT
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bool
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default y
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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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config ARCH_MAY_HAVE_PC_FDC
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bool
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default y
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config DMI
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bool
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default y
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config AUDIT_ARCH
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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 "Subarchitecture Type"
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default X86_PC
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config X86_PC
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bool "PC-compatible"
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help
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Choose this option if your computer is a standard PC or compatible.
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config X86_VSMP
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bool "Support for ScaleMP vSMP"
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help
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Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
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supposed to run on these EM64T-based machines. Only choose this option
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if you have one of these machines.
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endchoice
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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_INTERNODE_CACHE_BYTES
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int
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default "4096" if X86_VSMP
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default X86_L1_CACHE_BYTES if !X86_VSMP
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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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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 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 SCHED_MC
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bool "Multi-core scheduler support"
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depends on SMP
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default y
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help
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Multi-core scheduler support improves the CPU scheduler's decision
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making when dealing with multi-core CPU chips at a cost of slightly
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increased overhead in some places. If unsure say N here.
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source "kernel/Kconfig.preempt"
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config NUMA
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bool "Non Uniform Memory Access (NUMA) Support"
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depends on SMP
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help
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Enable NUMA (Non Uniform Memory Access) support. The kernel
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will try to allocate memory used by a CPU on the local memory
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controller of the CPU 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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If the system is EM64T, you should say N unless your system is EM64T
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NUMA.
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config K8_NUMA
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bool "Old style AMD Opteron NUMA detection"
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depends on NUMA
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default y
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help
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Enable K8 NUMA node topology detection. You should say Y here if
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you have a multi processor AMD K8 system. This uses an old
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method to read the NUMA configurtion directly from the builtin
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Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
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instead, which also takes priority if both are compiled in.
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config NODES_SHIFT
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int
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default "6"
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depends on NEED_MULTIPLE_NODES
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# Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig.
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config X86_64_ACPI_NUMA
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bool "ACPI NUMA detection"
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depends on NUMA
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select ACPI
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select PCI
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select ACPI_NUMA
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default y
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help
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Enable ACPI SRAT based node topology detection.
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config NUMA_EMU
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bool "NUMA emulation"
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depends on NUMA
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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 ARCH_DISCONTIGMEM_ENABLE
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bool
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depends on NUMA
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default y
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config ARCH_DISCONTIGMEM_ENABLE
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def_bool y
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depends on NUMA
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config ARCH_DISCONTIGMEM_DEFAULT
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def_bool y
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depends on NUMA
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config ARCH_SPARSEMEM_ENABLE
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def_bool y
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depends on (NUMA || EXPERIMENTAL)
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config ARCH_MEMORY_PROBE
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def_bool y
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depends on MEMORY_HOTPLUG
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config ARCH_FLATMEM_ENABLE
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def_bool y
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depends on !NUMA
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source "mm/Kconfig"
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config HAVE_ARCH_EARLY_PFN_TO_NID
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def_bool y
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depends on NUMA
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config OUT_OF_LINE_PFN_TO_PAGE
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def_bool y
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depends on DISCONTIGMEM
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config NR_CPUS
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int "Maximum number of CPUs (2-256)"
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range 2 255
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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 HOTPLUG_CPU
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bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
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depends on SMP && HOTPLUG && EXPERIMENTAL
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help
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Say Y here to experiment with turning CPUs off and on. CPUs
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can be controlled through /sys/devices/system/cpu/cpu#.
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Say N if you want to disable CPU hotplug.
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config ARCH_ENABLE_MEMORY_HOTPLUG
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def_bool y
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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/hardwaredesign/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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# Mark as embedded because too many people got it wrong.
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# The code disables itself when not needed.
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config IOMMU
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bool "IOMMU support" if EMBEDDED
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default y
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select SWIOTLB
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select AGP
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depends on PCI
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help
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Support for full DMA access of devices with 32bit memory access only
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on systems with more than 3GB. This is usually needed for USB,
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sound, many IDE/SATA chipsets and some other devices.
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Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
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based IOMMU and a software bounce buffer based IOMMU used on Intel
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systems and as fallback.
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The code is only active when needed (enough memory and limited
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device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
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too.
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config CALGARY_IOMMU
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bool "IBM Calgary IOMMU support"
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default y
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select SWIOTLB
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depends on PCI && EXPERIMENTAL
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help
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Support for hardware IOMMUs in IBM's xSeries x366 and x460
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systems. Needed to run systems with more than 3GB of memory
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properly with 32-bit PCI devices that do not support DAC
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(Double Address Cycle). Calgary also supports bus level
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isolation, where all DMAs pass through the IOMMU. This
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prevents them from going anywhere except their intended
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destination. This catches hard-to-find kernel bugs and
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mis-behaving drivers and devices that do not use the DMA-API
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properly to set up their DMA buffers. The IOMMU can be
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turned off at boot time with the iommu=off parameter.
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Normally the kernel will make the right choice by itself.
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If unsure, say Y.
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# need this always selected by IOMMU for the VIA workaround
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config SWIOTLB
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bool
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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 X86_MCE_AMD
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bool "AMD 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 AMD specific MCE features such as
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the DRAM Error Threshold.
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config KEXEC
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bool "kexec system call (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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help
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kexec is a system call that implements the ability to shutdown your
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current kernel, and to start another kernel. It is like a reboot
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but it is independent of the system firmware. And like a reboot
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you can start any kernel with it, not just Linux.
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The name comes from the similarity to the exec system call.
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It is an ongoing process to be certain the hardware in a machine
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is properly shutdown, so do not be surprised if this code does not
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initially work for you. It may help to enable device hotplugging
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support. As of this writing the exact hardware interface is
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strongly in flux, so no good recommendation can be made.
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config CRASH_DUMP
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bool "kernel crash dumps (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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help
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Generate crash dump after being started by kexec.
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This should be normally only set in special crash dump kernels
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which are loaded in the main kernel with kexec-tools into
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a specially reserved region and then later executed after
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a crash by kdump/kexec. The crash dump kernel must be compiled
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to a memory address not used by the main kernel or BIOS using
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PHYSICAL_START.
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For more details see Documentation/kdump/kdump.txt
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config PHYSICAL_START
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hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
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default "0x1000000" if CRASH_DUMP
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default "0x200000"
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help
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This gives the physical address where the kernel is loaded. Normally
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for regular kernels this value is 0x200000 (2MB). But in the case
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of kexec on panic the fail safe kernel needs to run at a different
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address than the panic-ed kernel. This option is used to set the load
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address for kernels used to capture crash dump on being kexec'ed
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after panic. The default value for crash dump kernels is
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0x1000000 (16MB). This can also be set based on the "X" value as
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specified in the "crashkernel=YM@XM" command line boot parameter
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passed to the panic-ed kernel. Typically this parameter is set as
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crashkernel=64M@16M. Please take a look at
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Documentation/kdump/kdump.txt for more details about crash dumps.
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Don't change this unless you know what you are doing.
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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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source kernel/Kconfig.hz
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config REORDER
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bool "Function reordering"
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default n
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help
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|
This option enables the toolchain to reorder functions for a more
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optimal TLB usage. If you have pretty much any version of binutils,
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this can increase your kernel build time by roughly one minute.
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config K8_NB
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def_bool y
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depends on AGP_AMD64 || IOMMU || (PCI && NUMA)
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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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#
|
|
config GENERIC_HARDIRQS
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_IRQ_PROBE
|
|
bool
|
|
default y
|
|
|
|
# we have no ISA slots, but we do have ISA-style DMA.
|
|
config ISA_DMA_API
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_PENDING_IRQ
|
|
bool
|
|
depends on GENERIC_HARDIRQS && SMP
|
|
default y
|
|
|
|
menu "Power management options"
|
|
|
|
source kernel/power/Kconfig
|
|
|
|
source "drivers/acpi/Kconfig"
|
|
|
|
source "arch/x86_64/kernel/cpufreq/Kconfig"
|
|
|
|
endmenu
|
|
|
|
menu "Bus options (PCI etc.)"
|
|
|
|
config PCI
|
|
bool "PCI support"
|
|
|
|
# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
|
|
config PCI_DIRECT
|
|
bool
|
|
depends on PCI
|
|
default y
|
|
|
|
config PCI_MMCONFIG
|
|
bool "Support mmconfig PCI config space access"
|
|
depends on PCI && ACPI
|
|
|
|
source "drivers/pci/pcie/Kconfig"
|
|
|
|
source "drivers/pci/Kconfig"
|
|
|
|
source "drivers/pcmcia/Kconfig"
|
|
|
|
source "drivers/pci/hotplug/Kconfig"
|
|
|
|
endmenu
|
|
|
|
|
|
menu "Executable file formats / Emulations"
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
config IA32_EMULATION
|
|
bool "IA32 Emulation"
|
|
help
|
|
Include code to run 32-bit programs under a 64-bit kernel. You should likely
|
|
turn this on, unless you're 100% sure that you don't have any 32-bit programs
|
|
left.
|
|
|
|
config IA32_AOUT
|
|
tristate "IA32 a.out support"
|
|
depends on IA32_EMULATION
|
|
help
|
|
Support old a.out binaries in the 32bit emulation.
|
|
|
|
config COMPAT
|
|
bool
|
|
depends on IA32_EMULATION
|
|
default y
|
|
|
|
config SYSVIPC_COMPAT
|
|
bool
|
|
depends on COMPAT && SYSVIPC
|
|
default y
|
|
|
|
endmenu
|
|
|
|
source "net/Kconfig"
|
|
|
|
source drivers/Kconfig
|
|
|
|
source "drivers/firmware/Kconfig"
|
|
|
|
source fs/Kconfig
|
|
|
|
menu "Instrumentation Support"
|
|
depends on EXPERIMENTAL
|
|
|
|
source "arch/x86_64/oprofile/Kconfig"
|
|
|
|
config KPROBES
|
|
bool "Kprobes (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL && MODULES
|
|
help
|
|
Kprobes allows you to trap at almost any kernel address and
|
|
execute a callback function. register_kprobe() establishes
|
|
a probepoint and specifies the callback. Kprobes is useful
|
|
for kernel debugging, non-intrusive instrumentation and testing.
|
|
If in doubt, say "N".
|
|
endmenu
|
|
|
|
source "arch/x86_64/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
source "lib/Kconfig"
|