da8f153e51
This reverts commit 34feb2c83b.
Suresh Siddha points out that this one breaks the fundamental
requirement that you cannot free page table pages before the TLB caches
are flushed. The quicklists do not give the same kinds of guarantees
that the mmu_gather structure does, at least not in NUMA configurations.
Requested-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Asit Mallick <asit.k.mallick@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
800 lines
21 KiB
Text
800 lines
21 KiB
Text
#
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# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.txt.
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#
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# Note: ISA is disabled and will hopefully never be enabled.
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# If you managed to buy an ISA x86-64 box you'll have to fix all the
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# ISA drivers you need yourself.
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#
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mainmenu "Linux Kernel Configuration"
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config X86_64
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bool
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default y
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help
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Port to the x86-64 architecture. x86-64 is a 64-bit extension to the
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classical 32-bit x86 architecture. For details see
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<http://www.x86-64.org/>.
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config 64BIT
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def_bool y
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config X86
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bool
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default y
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config GENERIC_TIME
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bool
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default y
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config GENERIC_TIME_VSYSCALL
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bool
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default y
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config GENERIC_CMOS_UPDATE
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bool
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default y
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config ZONE_DMA32
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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 ZONE_DMA
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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 ARCH_POPULATES_NODE_MAP
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def_bool 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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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 ARCH_HAS_ILOG2_U32
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bool
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default n
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config ARCH_HAS_ILOG2_U64
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bool
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default n
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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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depends on PCI
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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 GENERIC_CPU
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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 P4 / older Netburst based Xeon"
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help
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Optimize for Intel Pentium 4 and older Nocona/Dempsey Xeon CPUs
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with Intel Extended Memory 64 Technology(EM64T). For details see
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<http://www.intel.com/technology/64bitextensions/>.
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Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
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Netburst core and shouldn't use this option. You can distinguish them
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using the cpu family field
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in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one
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(this rule only applies to systems that support EM64T)
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config MCORE2
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bool "Intel Core2 / newer Xeon"
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help
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Optimize for Intel Core2 and newer Xeons (51xx)
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You can distinguish the newer Xeons from the older ones using
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the cpu family field in /proc/cpuinfo. 15 is an older Xeon
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(use CONFIG_MPSC then), 6 is a newer one. This rule only
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applies to CPUs that support EM64T.
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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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Run equally well on all x86-64 CPUs.
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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 || MCORE2
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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 || MCORE2
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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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select FW_LOADER
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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 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"
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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 && PCI
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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 configuration 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_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 MEMORY_HOTPLUG_RESERVE
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def_bool y
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depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
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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 (2-255)"
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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 255 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 PHYSICAL_ALIGN
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hex
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default "0x200000"
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config HOTPLUG_CPU
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bool "Support for suspend on SMP and 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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This is also required for suspend/hibernation on SMP systems.
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Say N if you want to disable CPU hotplug and don't need to
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suspend.
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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 hardware IOMMU and a software bounce buffer based IOMMU used
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on Intel 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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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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config CALGARY_IOMMU_ENABLED_BY_DEFAULT
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bool "Should Calgary be enabled by default?"
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default y
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depends on CALGARY_IOMMU
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help
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Should Calgary be enabled by default? if you choose 'y', Calgary
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will be used (if it exists). If you choose 'n', Calgary will not be
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used even if it exists. If you choose 'n' and would like to use
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Calgary anyway, pass 'iommu=calgary' on the kernel command line.
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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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help
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Support for software bounce buffers used on x86-64 systems
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which don't have a hardware IOMMU (e.g. the current generation
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of Intel's x86-64 CPUs). Using this PCI devices which can only
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access 32-bits of memory can be used on systems with more than
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3 GB of memory. If unsure, say Y.
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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"
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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.
|
|
|
|
It is an ongoing process to be certain the hardware in a machine
|
|
is properly shutdown, so do not be surprised if this code does not
|
|
initially work for you. It may help to enable device hotplugging
|
|
support. As of this writing the exact hardware interface is
|
|
strongly in flux, so no good recommendation can be made.
|
|
|
|
config CRASH_DUMP
|
|
bool "kernel crash dumps (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL
|
|
help
|
|
Generate crash dump after being started by kexec.
|
|
This should be normally only set in special crash dump kernels
|
|
which are loaded in the main kernel with kexec-tools into
|
|
a specially reserved region and then later executed after
|
|
a crash by kdump/kexec. The crash dump kernel must be compiled
|
|
to a memory address not used by the main kernel or BIOS using
|
|
PHYSICAL_START.
|
|
For more details see Documentation/kdump/kdump.txt
|
|
|
|
config RELOCATABLE
|
|
bool "Build a relocatable kernel(EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL
|
|
help
|
|
Builds a relocatable kernel. This enables loading and running
|
|
a kernel binary from a different physical address than it has
|
|
been compiled for.
|
|
|
|
One use is for the kexec on panic case where the recovery kernel
|
|
must live at a different physical address than the primary
|
|
kernel.
|
|
|
|
Note: If CONFIG_RELOCATABLE=y, then kernel run from the address
|
|
it has been loaded at and compile time physical address
|
|
(CONFIG_PHYSICAL_START) is ignored.
|
|
|
|
config PHYSICAL_START
|
|
hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
|
|
default "0x200000"
|
|
help
|
|
This gives the physical address where the kernel is loaded. It
|
|
should be aligned to 2MB boundary.
|
|
|
|
If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
|
|
bzImage will decompress itself to above physical address and
|
|
run from there. Otherwise, bzImage will run from the address where
|
|
it has been loaded by the boot loader and will ignore above physical
|
|
address.
|
|
|
|
In normal kdump cases one does not have to set/change this option
|
|
as now bzImage can be compiled as a completely relocatable image
|
|
(CONFIG_RELOCATABLE=y) and be used to load and run from a different
|
|
address. This option is mainly useful for the folks who don't want
|
|
to use a bzImage for capturing the crash dump and want to use a
|
|
vmlinux instead.
|
|
|
|
So if you are using bzImage for capturing the crash dump, leave
|
|
the value here unchanged to 0x200000 and set CONFIG_RELOCATABLE=y.
|
|
Otherwise if you plan to use vmlinux for capturing the crash dump
|
|
change this value to start of the reserved region (Typically 16MB
|
|
0x1000000). In other words, it can be set based on the "X" value as
|
|
specified in the "crashkernel=YM@XM" command line boot parameter
|
|
passed to the panic-ed kernel. Typically this parameter is set as
|
|
crashkernel=64M@16M. Please take a look at
|
|
Documentation/kdump/kdump.txt for more details about crash dumps.
|
|
|
|
Usage of bzImage for capturing the crash dump is advantageous as
|
|
one does not have to build two kernels. Same kernel can be used
|
|
as production kernel and capture kernel.
|
|
|
|
Don't change this unless you know what you are doing.
|
|
|
|
config SECCOMP
|
|
bool "Enable seccomp to safely compute untrusted bytecode"
|
|
depends on PROC_FS
|
|
default y
|
|
help
|
|
This kernel feature is useful for number crunching applications
|
|
that may need to compute untrusted bytecode during their
|
|
execution. By using pipes or other transports made available to
|
|
the process as file descriptors supporting the read/write
|
|
syscalls, it's possible to isolate those applications in
|
|
their own address space using seccomp. Once seccomp is
|
|
enabled via /proc/<pid>/seccomp, it cannot be disabled
|
|
and the task is only allowed to execute a few safe syscalls
|
|
defined by each seccomp mode.
|
|
|
|
If unsure, say Y. Only embedded should say N here.
|
|
|
|
config CC_STACKPROTECTOR
|
|
bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL
|
|
help
|
|
This option turns on the -fstack-protector GCC feature. This
|
|
feature puts, at the beginning of critical functions, a canary
|
|
value on the stack just before the return address, and validates
|
|
the value just before actually returning. Stack based buffer
|
|
overflows (that need to overwrite this return address) now also
|
|
overwrite the canary, which gets detected and the attack is then
|
|
neutralized via a kernel panic.
|
|
|
|
This feature requires gcc version 4.2 or above, or a distribution
|
|
gcc with the feature backported. Older versions are automatically
|
|
detected and for those versions, this configuration option is ignored.
|
|
|
|
config CC_STACKPROTECTOR_ALL
|
|
bool "Use stack-protector for all functions"
|
|
depends on CC_STACKPROTECTOR
|
|
help
|
|
Normally, GCC only inserts the canary value protection for
|
|
functions that use large-ish on-stack buffers. By enabling
|
|
this option, GCC will be asked to do this for ALL functions.
|
|
|
|
source kernel/Kconfig.hz
|
|
|
|
config K8_NB
|
|
def_bool y
|
|
depends on AGP_AMD64 || IOMMU || (PCI && NUMA)
|
|
|
|
endmenu
|
|
|
|
#
|
|
# Use the generic interrupt handling code in kernel/irq/:
|
|
#
|
|
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"
|
|
select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
|
|
|
|
# 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 COMPAT_FOR_U64_ALIGNMENT
|
|
def_bool COMPAT
|
|
|
|
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"
|
|
depends on KALLSYMS && 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"
|