forked from luck/tmp_suning_uos_patched
bbab4f3bb7
VMI timer code. It works by taking over the local APIC clock when APIC is configured, which requires a couple hooks into the APIC code. The backend timer code could be commonized into the timer infrastructure, but there are some pieces missing (stolen time, in particular), and the exact semantics of when to do accounting for NO_IDLE need to be shared between different hypervisors as well. So for now, VMI timer is a separate module. [Adrian Bunk: cleanups] Subject: VMI timer patches Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andrew Morton <akpm@osdl.org>
1284 lines
42 KiB
Plaintext
1284 lines
42 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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mainmenu "Linux Kernel Configuration"
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config X86_32
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bool
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default y
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help
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This is Linux's home port. Linux was originally native to the Intel
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386, and runs on all the later x86 processors including the Intel
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486, 586, Pentiums, and various instruction-set-compatible chips by
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AMD, Cyrix, and others.
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config GENERIC_TIME
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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 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 ZONE_DMA
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bool
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default y
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config SBUS
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bool
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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 GENERIC_BUG
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bool
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default y
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depends on BUG
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config GENERIC_HWEIGHT
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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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source "init/Kconfig"
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menu "Processor type and features"
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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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Note that if you say Y here and choose architecture "586" or
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"Pentium" under "Processor family", the kernel will not work on 486
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architectures. Similarly, multiprocessor kernels for the "PPro"
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architecture may not work on all Pentium based boards.
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People using multiprocessor machines who say Y here should also say
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Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
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Management" code will be disabled if you say Y here.
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See also the <file:Documentation/smp.txt>,
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<file:Documentation/i386/IO-APIC.txt>,
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<file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
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<http://www.tldp.org/docs.html#howto>.
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If you don't know what to do here, say N.
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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_ELAN
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bool "AMD Elan"
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help
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Select this for an AMD Elan processor.
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Do not use this option for K6/Athlon/Opteron processors!
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If unsure, choose "PC-compatible" instead.
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config X86_VOYAGER
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bool "Voyager (NCR)"
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help
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Voyager is an MCA-based 32-way capable SMP architecture proprietary
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to NCR Corp. Machine classes 345x/35xx/4100/51xx are Voyager-based.
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*** WARNING ***
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If you do not specifically know you have a Voyager based machine,
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say N here, otherwise the kernel you build will not be bootable.
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config X86_NUMAQ
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bool "NUMAQ (IBM/Sequent)"
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select SMP
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select NUMA
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help
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This option is used for getting Linux to run on a (IBM/Sequent) NUMA
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multiquad box. This changes the way that processors are bootstrapped,
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and uses Clustered Logical APIC addressing mode instead of Flat Logical.
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You will need a new lynxer.elf file to flash your firmware with - send
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email to <Martin.Bligh@us.ibm.com>.
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config X86_SUMMIT
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bool "Summit/EXA (IBM x440)"
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depends on SMP
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help
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This option is needed for IBM systems that use the Summit/EXA chipset.
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In particular, it is needed for the x440.
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If you don't have one of these computers, you should say N here.
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If you want to build a NUMA kernel, you must select ACPI.
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config X86_BIGSMP
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bool "Support for other sub-arch SMP systems with more than 8 CPUs"
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depends on SMP
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help
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This option is needed for the systems that have more than 8 CPUs
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and if the system is not of any sub-arch type above.
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If you don't have such a system, you should say N here.
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config X86_VISWS
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bool "SGI 320/540 (Visual Workstation)"
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help
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The SGI Visual Workstation series is an IA32-based workstation
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based on SGI systems chips with some legacy PC hardware attached.
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Say Y here to create a kernel to run on the SGI 320 or 540.
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A kernel compiled for the Visual Workstation will not run on PCs
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and vice versa. See <file:Documentation/sgi-visws.txt> for details.
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config X86_GENERICARCH
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bool "Generic architecture (Summit, bigsmp, ES7000, default)"
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help
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This option compiles in the Summit, bigsmp, ES7000, default subarchitectures.
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It is intended for a generic binary kernel.
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If you want a NUMA kernel, select ACPI. We need SRAT for NUMA.
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config X86_ES7000
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bool "Support for Unisys ES7000 IA32 series"
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depends on SMP
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help
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Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
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supposed to run on an IA32-based Unisys ES7000 system.
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Only choose this option if you have such a system, otherwise you
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should say N here.
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endchoice
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config PARAVIRT
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bool "Paravirtualization support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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depends on !(X86_VISWS || X86_VOYAGER)
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help
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Paravirtualization is a way of running multiple instances of
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Linux on the same machine, under a hypervisor. This option
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changes the kernel so it can modify itself when it is run
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under a hypervisor, improving performance significantly.
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However, when run without a hypervisor the kernel is
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theoretically slower. If in doubt, say N.
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config VMI
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bool "VMI Paravirt-ops support"
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depends on PARAVIRT
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default y
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help
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VMI provides a paravirtualized interface to multiple hypervisors
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include VMware ESX server and Xen by connecting to a ROM module
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provided by the hypervisor.
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config ACPI_SRAT
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bool
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default y
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depends on ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH)
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select ACPI_NUMA
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config HAVE_ARCH_PARSE_SRAT
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bool
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default y
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depends on ACPI_SRAT
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config X86_SUMMIT_NUMA
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bool
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default y
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depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
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config X86_CYCLONE_TIMER
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bool
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default y
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depends on X86_SUMMIT || X86_GENERICARCH
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config ES7000_CLUSTERED_APIC
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bool
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default y
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depends on SMP && X86_ES7000 && MPENTIUMIII
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source "arch/i386/Kconfig.cpu"
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config HPET_TIMER
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bool "HPET Timer Support"
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help
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This enables the use of the HPET for the kernel's internal timer.
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HPET is the next generation timer replacing legacy 8254s.
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You can safely choose Y here. However, HPET will only be
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activated if the platform and the BIOS support this feature.
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Otherwise the 8254 will be used for timing services.
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Choose N to continue using the legacy 8254 timer.
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config HPET_EMULATE_RTC
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bool
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depends on HPET_TIMER && RTC=y
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default y
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config NR_CPUS
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int "Maximum number of CPUs (2-255)"
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range 2 255
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depends on SMP
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default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
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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. The maximum supported value is 255 and the
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minimum value which makes sense is 2.
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This is purely to save memory - each supported CPU adds
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approximately eight kilobytes to the kernel image.
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config SCHED_SMT
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bool "SMT (Hyperthreading) scheduler support"
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depends on X86_HT
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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 X86_HT
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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 X86_UP_APIC
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bool "Local APIC support on uniprocessors"
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depends on !SMP && !(X86_VISWS || X86_VOYAGER || X86_GENERICARCH)
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help
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A local APIC (Advanced Programmable Interrupt Controller) is an
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integrated interrupt controller in the CPU. If you have a single-CPU
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system which has a processor with a local APIC, you can say Y here to
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enable and use it. If you say Y here even though your machine doesn't
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have a local APIC, then the kernel will still run with no slowdown at
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all. The local APIC supports CPU-generated self-interrupts (timer,
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performance counters), and the NMI watchdog which detects hard
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lockups.
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config X86_UP_IOAPIC
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bool "IO-APIC support on uniprocessors"
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depends on X86_UP_APIC
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help
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An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
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SMP-capable replacement for PC-style interrupt controllers. Most
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SMP systems and many recent uniprocessor systems have one.
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If you have a single-CPU system with an IO-APIC, you can say Y here
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to use it. If you say Y here even though your machine doesn't have
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an IO-APIC, then the kernel will still run with no slowdown at all.
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config X86_LOCAL_APIC
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bool
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depends on X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER) || X86_GENERICARCH
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default y
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config X86_IO_APIC
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bool
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depends on X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER)) || X86_GENERICARCH
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default y
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config X86_VISWS_APIC
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bool
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depends on X86_VISWS
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default y
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config X86_MCE
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bool "Machine Check Exception"
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depends on !X86_VOYAGER
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---help---
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Machine Check Exception support allows the processor to notify the
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kernel if it detects a problem (e.g. overheating, component failure).
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The action the kernel takes depends on the severity of the problem,
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ranging from a warning message on the console, to halting the machine.
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Your processor must be a Pentium or newer to support this - check the
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flags in /proc/cpuinfo for mce. Note that some older Pentium systems
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have a design flaw which leads to false MCE events - hence MCE is
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disabled on all P5 processors, unless explicitly enabled with "mce"
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as a boot argument. Similarly, if MCE is built in and creates a
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problem on some new non-standard machine, you can boot with "nomce"
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to disable it. MCE support simply ignores non-MCE processors like
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the 386 and 486, so nearly everyone can say Y here.
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config X86_MCE_NONFATAL
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tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
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depends on X86_MCE
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help
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Enabling this feature starts a timer that triggers every 5 seconds which
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will look at the machine check registers to see if anything happened.
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Non-fatal problems automatically get corrected (but still logged).
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Disable this if you don't want to see these messages.
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Seeing the messages this option prints out may be indicative of dying hardware,
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or out-of-spec (ie, overclocked) hardware.
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This option only does something on certain CPUs.
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(AMD Athlon/Duron and Intel Pentium 4)
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config X86_MCE_P4THERMAL
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bool "check for P4 thermal throttling interrupt."
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depends on X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS
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help
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Enabling this feature will cause a message to be printed when the P4
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enters thermal throttling.
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config VM86
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default y
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bool "Enable VM86 support" if EMBEDDED
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help
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This option is required by programs like DOSEMU to run 16-bit legacy
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code on X86 processors. It also may be needed by software like
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XFree86 to initialize some video cards via BIOS. Disabling this
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option saves about 6k.
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config TOSHIBA
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tristate "Toshiba Laptop support"
|
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---help---
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This adds a driver to safely access the System Management Mode of
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the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
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not work on models with a Phoenix BIOS. The System Management Mode
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is used to set the BIOS and power saving options on Toshiba portables.
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For information on utilities to make use of this driver see the
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Toshiba Linux utilities web site at:
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<http://www.buzzard.org.uk/toshiba/>.
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Say Y if you intend to run this kernel on a Toshiba portable.
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Say N otherwise.
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config I8K
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tristate "Dell laptop support"
|
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---help---
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This adds a driver to safely access the System Management Mode
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of the CPU on the Dell Inspiron 8000. The System Management Mode
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is used to read cpu temperature and cooling fan status and to
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control the fans on the I8K portables.
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This driver has been tested only on the Inspiron 8000 but it may
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also work with other Dell laptops. You can force loading on other
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models by passing the parameter `force=1' to the module. Use at
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your own risk.
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For information on utilities to make use of this driver see the
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I8K Linux utilities web site at:
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<http://people.debian.org/~dz/i8k/>
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Say Y if you intend to run this kernel on a Dell Inspiron 8000.
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Say N otherwise.
|
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config X86_REBOOTFIXUPS
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bool "Enable X86 board specific fixups for reboot"
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depends on X86
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default n
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---help---
|
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This enables chipset and/or board specific fixups to be done
|
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in order to get reboot to work correctly. This is only needed on
|
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some combinations of hardware and BIOS. The symptom, for which
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this config is intended, is when reboot ends with a stalled/hung
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system.
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Currently, the only fixup is for the Geode GX1/CS5530A/TROM2.1.
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combination.
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Say Y if you want to enable the fixup. Currently, it's safe to
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enable this option even if you don't need it.
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Say N otherwise.
|
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config MICROCODE
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tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
|
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select FW_LOADER
|
|
---help---
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If you say Y here and also to "/dev file system support" in the
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'File systems' section, you will be able to update the microcode on
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Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
|
|
Pentium III, Pentium 4, Xeon etc. You will obviously need the
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actual microcode binary data itself which is not shipped with the
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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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config MICROCODE_OLD_INTERFACE
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bool
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depends on MICROCODE
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default y
|
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|
|
config X86_MSR
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|
tristate "/dev/cpu/*/msr - Model-specific register support"
|
|
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
|
|
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
|
|
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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source "drivers/firmware/Kconfig"
|
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choice
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prompt "High Memory Support"
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|
default HIGHMEM4G if !X86_NUMAQ
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default HIGHMEM64G if X86_NUMAQ
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config NOHIGHMEM
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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
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|
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".
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|
If you are compiling a kernel which will never run on a machine with
|
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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
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|
space and the remaining part of the 4GB virtual memory space is used
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by the kernel to permanently map as much physical memory as
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possible.
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If the machine has between 1 and 4 Gigabytes physical RAM, then
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answer "4GB" here.
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|
If more than 4 Gigabytes is used then answer "64GB" here. This
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selection turns Intel PAE (Physical Address Extension) mode on.
|
|
PAE implements 3-level paging on IA32 processors. PAE is fully
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|
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 X86_CMPXCHG64
|
|
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
|
|
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 !HIGHMEM
|
|
bool "3G/1G user/kernel split (for full 1G low memory)"
|
|
config VMSPLIT_2G
|
|
bool "2G/2G user/kernel split"
|
|
config VMSPLIT_1G
|
|
bool "1G/3G user/kernel split"
|
|
endchoice
|
|
|
|
config PAGE_OFFSET
|
|
hex
|
|
default 0xB0000000 if VMSPLIT_3G_OPT
|
|
default 0x78000000 if VMSPLIT_2G
|
|
default 0x40000000 if VMSPLIT_1G
|
|
default 0xC0000000
|
|
|
|
config HIGHMEM
|
|
bool
|
|
depends on HIGHMEM64G || HIGHMEM4G
|
|
default y
|
|
|
|
config X86_PAE
|
|
bool
|
|
depends on HIGHMEM64G
|
|
default y
|
|
select RESOURCES_64BIT
|
|
|
|
# Common NUMA Features
|
|
config NUMA
|
|
bool "Numa Memory Allocation and Scheduler Support"
|
|
depends on SMP && HIGHMEM64G && (X86_NUMAQ || (X86_SUMMIT || X86_GENERICARCH) && ACPI)
|
|
default n if X86_PC
|
|
default y if (X86_NUMAQ || X86_SUMMIT)
|
|
|
|
comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
|
|
depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI)
|
|
|
|
config NODES_SHIFT
|
|
int
|
|
default "4" if X86_NUMAQ
|
|
default "3"
|
|
depends on NEED_MULTIPLE_NODES
|
|
|
|
config HAVE_ARCH_BOOTMEM_NODE
|
|
bool
|
|
depends on NUMA
|
|
default y
|
|
|
|
config ARCH_HAVE_MEMORY_PRESENT
|
|
bool
|
|
depends on DISCONTIGMEM
|
|
default y
|
|
|
|
config NEED_NODE_MEMMAP_SIZE
|
|
bool
|
|
depends on DISCONTIGMEM || SPARSEMEM
|
|
default y
|
|
|
|
config HAVE_ARCH_ALLOC_REMAP
|
|
bool
|
|
depends on NUMA
|
|
default y
|
|
|
|
config ARCH_FLATMEM_ENABLE
|
|
def_bool y
|
|
depends on (ARCH_SELECT_MEMORY_MODEL && X86_PC)
|
|
|
|
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 || (X86_PC && EXPERIMENTAL))
|
|
select SPARSEMEM_STATIC
|
|
|
|
config ARCH_SELECT_MEMORY_MODEL
|
|
def_bool y
|
|
depends on ARCH_SPARSEMEM_ENABLE
|
|
|
|
config ARCH_POPULATES_NODE_MAP
|
|
def_bool y
|
|
|
|
source "mm/Kconfig"
|
|
|
|
config HIGHPTE
|
|
bool "Allocate 3rd-level pagetables from highmem"
|
|
depends on 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 "Math emulation"
|
|
---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/i386/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 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 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_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.
|
|
|
|
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 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.
|
|
For more details see Documentation/kdump/kdump.txt
|
|
|
|
config PHYSICAL_START
|
|
hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
|
|
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 build a kernel image that retains relocation information
|
|
so it can be loaded someplace besides the default 1MB.
|
|
The relocations tend to 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.
|
|
|
|
config PHYSICAL_ALIGN
|
|
hex "Alignment value to which kernel should be aligned"
|
|
default "0x100000"
|
|
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 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.
|
|
|
|
config COMPAT_VDSO
|
|
bool "Compat VDSO support"
|
|
default y
|
|
depends on !PARAVIRT
|
|
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 HIGHMEM
|
|
|
|
menu "Power management options (ACPI, APM)"
|
|
depends on !X86_VOYAGER
|
|
|
|
source kernel/power/Kconfig
|
|
|
|
source "drivers/acpi/Kconfig"
|
|
|
|
menu "APM (Advanced Power Management) BIOS Support"
|
|
depends on PM && !X86_VISWS
|
|
|
|
config APM
|
|
tristate "APM (Advanced Power Management) BIOS support"
|
|
depends on PM
|
|
---help---
|
|
APM is a BIOS specification for saving power using several different
|
|
techniques. This is mostly useful for battery powered laptops with
|
|
APM compliant BIOSes. If you say Y here, the system time will be
|
|
reset after a RESUME operation, the /proc/apm device will provide
|
|
battery status information, and user-space programs will receive
|
|
notification of APM "events" (e.g. battery status change).
|
|
|
|
If you select "Y" here, you can disable actual use of the APM
|
|
BIOS by passing the "apm=off" option to the kernel at boot time.
|
|
|
|
Note that the APM support is almost completely disabled for
|
|
machines with more than one CPU.
|
|
|
|
In order to use APM, you will need supporting software. For location
|
|
and more information, read <file:Documentation/pm.txt> and the
|
|
Battery Powered Linux mini-HOWTO, available from
|
|
<http://www.tldp.org/docs.html#howto>.
|
|
|
|
This driver does not spin down disk drives (see the hdparm(8)
|
|
manpage ("man 8 hdparm") for that), and it doesn't turn off
|
|
VESA-compliant "green" monitors.
|
|
|
|
This driver does not support the TI 4000M TravelMate and the ACER
|
|
486/DX4/75 because they don't have compliant BIOSes. Many "green"
|
|
desktop machines also don't have compliant BIOSes, and this driver
|
|
may cause those machines to panic during the boot phase.
|
|
|
|
Generally, if you don't have a battery in your machine, there isn't
|
|
much point in using this driver and you should say N. If you get
|
|
random kernel OOPSes or reboots that don't seem to be related to
|
|
anything, try disabling/enabling this option (or disabling/enabling
|
|
APM in your BIOS).
|
|
|
|
Some other things you should try when experiencing seemingly random,
|
|
"weird" problems:
|
|
|
|
1) make sure that you have enough swap space and that it is
|
|
enabled.
|
|
2) pass the "no-hlt" option to the kernel
|
|
3) switch on floating point emulation in the kernel and pass
|
|
the "no387" option to the kernel
|
|
4) pass the "floppy=nodma" option to the kernel
|
|
5) pass the "mem=4M" option to the kernel (thereby disabling
|
|
all but the first 4 MB of RAM)
|
|
6) make sure that the CPU is not over clocked.
|
|
7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
|
|
8) disable the cache from your BIOS settings
|
|
9) install a fan for the video card or exchange video RAM
|
|
10) install a better fan for the CPU
|
|
11) exchange RAM chips
|
|
12) exchange the motherboard.
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
module will be called apm.
|
|
|
|
config APM_IGNORE_USER_SUSPEND
|
|
bool "Ignore USER SUSPEND"
|
|
depends on APM
|
|
help
|
|
This option will ignore USER SUSPEND requests. On machines with a
|
|
compliant APM BIOS, you want to say N. However, on the NEC Versa M
|
|
series notebooks, it is necessary to say Y because of a BIOS bug.
|
|
|
|
config APM_DO_ENABLE
|
|
bool "Enable PM at boot time"
|
|
depends on APM
|
|
---help---
|
|
Enable APM features at boot time. From page 36 of the APM BIOS
|
|
specification: "When disabled, the APM BIOS does not automatically
|
|
power manage devices, enter the Standby State, enter the Suspend
|
|
State, or take power saving steps in response to CPU Idle calls."
|
|
This driver will make CPU Idle calls when Linux is idle (unless this
|
|
feature is turned off -- see "Do CPU IDLE calls", below). This
|
|
should always save battery power, but more complicated APM features
|
|
will be dependent on your BIOS implementation. You may need to turn
|
|
this option off if your computer hangs at boot time when using APM
|
|
support, or if it beeps continuously instead of suspending. Turn
|
|
this off if you have a NEC UltraLite Versa 33/C or a Toshiba
|
|
T400CDT. This is off by default since most machines do fine without
|
|
this feature.
|
|
|
|
config APM_CPU_IDLE
|
|
bool "Make CPU Idle calls when idle"
|
|
depends on APM
|
|
help
|
|
Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
|
|
On some machines, this can activate improved power savings, such as
|
|
a slowed CPU clock rate, when the machine is idle. These idle calls
|
|
are made after the idle loop has run for some length of time (e.g.,
|
|
333 mS). On some machines, this will cause a hang at boot time or
|
|
whenever the CPU becomes idle. (On machines with more than one CPU,
|
|
this option does nothing.)
|
|
|
|
config APM_DISPLAY_BLANK
|
|
bool "Enable console blanking using APM"
|
|
depends on APM
|
|
help
|
|
Enable console blanking using the APM. Some laptops can use this to
|
|
turn off the LCD backlight when the screen blanker of the Linux
|
|
virtual console blanks the screen. Note that this is only used by
|
|
the virtual console screen blanker, and won't turn off the backlight
|
|
when using the X Window system. This also doesn't have anything to
|
|
do with your VESA-compliant power-saving monitor. Further, this
|
|
option doesn't work for all laptops -- it might not turn off your
|
|
backlight at all, or it might print a lot of errors to the console,
|
|
especially if you are using gpm.
|
|
|
|
config APM_RTC_IS_GMT
|
|
bool "RTC stores time in GMT"
|
|
depends on APM
|
|
help
|
|
Say Y here if your RTC (Real Time Clock a.k.a. hardware clock)
|
|
stores the time in GMT (Greenwich Mean Time). Say N if your RTC
|
|
stores localtime.
|
|
|
|
It is in fact recommended to store GMT in your RTC, because then you
|
|
don't have to worry about daylight savings time changes. The only
|
|
reason not to use GMT in your RTC is if you also run a broken OS
|
|
that doesn't understand GMT.
|
|
|
|
config APM_ALLOW_INTS
|
|
bool "Allow interrupts during APM BIOS calls"
|
|
depends on APM
|
|
help
|
|
Normally we disable external interrupts while we are making calls to
|
|
the APM BIOS as a measure to lessen the effects of a badly behaving
|
|
BIOS implementation. The BIOS should reenable interrupts if it
|
|
needs to. Unfortunately, some BIOSes do not -- especially those in
|
|
many of the newer IBM Thinkpads. If you experience hangs when you
|
|
suspend, try setting this to Y. Otherwise, say N.
|
|
|
|
config APM_REAL_MODE_POWER_OFF
|
|
bool "Use real mode APM BIOS call to power off"
|
|
depends on APM
|
|
help
|
|
Use real mode APM BIOS calls to switch off the computer. This is
|
|
a work-around for a number of buggy BIOSes. Switch this option on if
|
|
your computer crashes instead of powering off properly.
|
|
|
|
endmenu
|
|
|
|
source "arch/i386/kernel/cpu/cpufreq/Kconfig"
|
|
|
|
endmenu
|
|
|
|
menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
|
|
|
|
config PCI
|
|
bool "PCI support" if !X86_VISWS
|
|
depends on !X86_VOYAGER
|
|
default y if X86_VISWS
|
|
help
|
|
Find out whether you have a PCI motherboard. PCI is the name of a
|
|
bus system, i.e. the way the CPU talks to the other stuff inside
|
|
your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
|
|
VESA. If you have PCI, say Y, otherwise N.
|
|
|
|
The PCI-HOWTO, available from
|
|
<http://www.tldp.org/docs.html#howto>, contains valuable
|
|
information about which PCI hardware does work under Linux and which
|
|
doesn't.
|
|
|
|
choice
|
|
prompt "PCI access mode"
|
|
depends on PCI && !X86_VISWS
|
|
default PCI_GOANY
|
|
---help---
|
|
On PCI systems, the BIOS can be used to detect the PCI devices and
|
|
determine their configuration. However, some old PCI motherboards
|
|
have BIOS bugs and may crash if this is done. Also, some embedded
|
|
PCI-based systems don't have any BIOS at all. Linux can also try to
|
|
detect the PCI hardware directly without using the BIOS.
|
|
|
|
With this option, you can specify how Linux should detect the
|
|
PCI devices. If you choose "BIOS", the BIOS will be used,
|
|
if you choose "Direct", the BIOS won't be used, and if you
|
|
choose "MMConfig", then PCI Express MMCONFIG will be used.
|
|
If you choose "Any", the kernel will try MMCONFIG, then the
|
|
direct access method and falls back to the BIOS if that doesn't
|
|
work. If unsure, go with the default, which is "Any".
|
|
|
|
config PCI_GOBIOS
|
|
bool "BIOS"
|
|
|
|
config PCI_GOMMCONFIG
|
|
bool "MMConfig"
|
|
|
|
config PCI_GODIRECT
|
|
bool "Direct"
|
|
|
|
config PCI_GOANY
|
|
bool "Any"
|
|
|
|
endchoice
|
|
|
|
config PCI_BIOS
|
|
bool
|
|
depends on !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
|
|
default y
|
|
|
|
config PCI_DIRECT
|
|
bool
|
|
depends on PCI && ((PCI_GODIRECT || PCI_GOANY) || X86_VISWS)
|
|
default y
|
|
|
|
config PCI_MMCONFIG
|
|
bool
|
|
depends on PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
|
|
default y
|
|
|
|
source "drivers/pci/pcie/Kconfig"
|
|
|
|
source "drivers/pci/Kconfig"
|
|
|
|
config ISA_DMA_API
|
|
bool
|
|
default y
|
|
|
|
config ISA
|
|
bool "ISA support"
|
|
depends on !(X86_VOYAGER || X86_VISWS)
|
|
help
|
|
Find out whether you have ISA slots on your motherboard. ISA is the
|
|
name of a bus system, i.e. the way the CPU talks to the other stuff
|
|
inside your box. Other bus systems are PCI, EISA, MicroChannel
|
|
(MCA) or VESA. ISA is an older system, now being displaced by PCI;
|
|
newer boards don't support it. If you have ISA, say Y, otherwise N.
|
|
|
|
config EISA
|
|
bool "EISA support"
|
|
depends on ISA
|
|
---help---
|
|
The Extended Industry Standard Architecture (EISA) bus was
|
|
developed as an open alternative to the IBM MicroChannel bus.
|
|
|
|
The EISA bus provided some of the features of the IBM MicroChannel
|
|
bus while maintaining backward compatibility with cards made for
|
|
the older ISA bus. The EISA bus saw limited use between 1988 and
|
|
1995 when it was made obsolete by the PCI bus.
|
|
|
|
Say Y here if you are building a kernel for an EISA-based machine.
|
|
|
|
Otherwise, say N.
|
|
|
|
source "drivers/eisa/Kconfig"
|
|
|
|
config MCA
|
|
bool "MCA support" if !(X86_VISWS || X86_VOYAGER)
|
|
default y if X86_VOYAGER
|
|
help
|
|
MicroChannel Architecture is found in some IBM PS/2 machines and
|
|
laptops. It is a bus system similar to PCI or ISA. See
|
|
<file:Documentation/mca.txt> (and especially the web page given
|
|
there) before attempting to build an MCA bus kernel.
|
|
|
|
source "drivers/mca/Kconfig"
|
|
|
|
config SCx200
|
|
tristate "NatSemi SCx200 support"
|
|
depends on !X86_VOYAGER
|
|
help
|
|
This provides basic support for National Semiconductor's
|
|
(now AMD's) Geode processors. The driver probes for the
|
|
PCI-IDs of several on-chip devices, so its a good dependency
|
|
for other scx200_* drivers.
|
|
|
|
If compiled as a module, the driver is named scx200.
|
|
|
|
config SCx200HR_TIMER
|
|
tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
|
|
depends on SCx200 && GENERIC_TIME
|
|
default y
|
|
help
|
|
This driver provides a clocksource built upon the on-chip
|
|
27MHz high-resolution timer. Its also a workaround for
|
|
NSC Geode SC-1100's buggy TSC, which loses time when the
|
|
processor goes idle (as is done by the scheduler). The
|
|
other workaround is idle=poll boot option.
|
|
|
|
config K8_NB
|
|
def_bool y
|
|
depends on AGP_AMD64
|
|
|
|
source "drivers/pcmcia/Kconfig"
|
|
|
|
source "drivers/pci/hotplug/Kconfig"
|
|
|
|
endmenu
|
|
|
|
menu "Executable file formats"
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
endmenu
|
|
|
|
source "net/Kconfig"
|
|
|
|
source "drivers/Kconfig"
|
|
|
|
source "fs/Kconfig"
|
|
|
|
menu "Instrumentation Support"
|
|
depends on EXPERIMENTAL
|
|
|
|
source "arch/i386/oprofile/Kconfig"
|
|
|
|
config KPROBES
|
|
bool "Kprobes (EXPERIMENTAL)"
|
|
depends on KALLSYMS && 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/i386/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
source "lib/Kconfig"
|
|
|
|
#
|
|
# Use the generic interrupt handling code in kernel/irq/:
|
|
#
|
|
config GENERIC_HARDIRQS
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_IRQ_PROBE
|
|
bool
|
|
default y
|
|
|
|
config GENERIC_PENDING_IRQ
|
|
bool
|
|
depends on GENERIC_HARDIRQS && SMP
|
|
default y
|
|
|
|
config X86_SMP
|
|
bool
|
|
depends on SMP && !X86_VOYAGER
|
|
default y
|
|
|
|
config X86_HT
|
|
bool
|
|
depends on SMP && !(X86_VISWS || X86_VOYAGER)
|
|
default y
|
|
|
|
config X86_BIOS_REBOOT
|
|
bool
|
|
depends on !(X86_VISWS || X86_VOYAGER)
|
|
default y
|
|
|
|
config X86_TRAMPOLINE
|
|
bool
|
|
depends on X86_SMP || (X86_VOYAGER && SMP)
|
|
default y
|
|
|
|
config KTIME_SCALAR
|
|
bool
|
|
default y
|
|
|
|
config NO_IDLE_HZ
|
|
bool
|
|
depends on PARAVIRT
|
|
default y
|
|
help
|
|
Switches the regular HZ timer off when the system is going idle.
|
|
This helps a hypervisor detect that the Linux system is idle,
|
|
reducing the overhead of idle systems.
|