2005-04-17 05:20:36 +07:00
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#
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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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2007-02-16 16:28:20 +07:00
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config GENERIC_TIME
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bool
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default y
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2007-02-16 16:28:21 +07:00
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config GENERIC_TIME_VSYSCALL
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bool
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default y
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2006-09-26 13:31:13 +07:00
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config ZONE_DMA32
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bool
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default y
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2006-07-03 14:25:01 +07:00
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config LOCKDEP_SUPPORT
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bool
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default y
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2006-07-03 14:24:40 +07:00
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config STACKTRACE_SUPPORT
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bool
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default y
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2005-09-04 05:56:52 +07:00
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config SEMAPHORE_SLEEPERS
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bool
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default y
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2005-04-17 05:20:36 +07:00
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config MMU
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bool
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default y
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2007-02-10 16:43:14 +07:00
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config ZONE_DMA
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bool
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default y
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2005-04-17 05:20:36 +07:00
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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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[PATCH] bitops: x86_64: use generic bitops
- remove sched_find_first_bit()
- remove generic_hweight{64,32,16,8}()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
- remove minix_{test,set,test_and_clear,test,find_first_zero}_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 16:39:42 +07:00
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config GENERIC_HWEIGHT
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bool
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default y
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2005-04-17 05:20:36 +07:00
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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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2005-09-06 07:48:42 +07:00
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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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2006-09-27 15:49:52 +07:00
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config ARCH_POPULATES_NODE_MAP
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def_bool y
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2006-01-12 04:43:33 +07:00
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config DMI
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bool
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default y
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2006-09-12 14:04:40 +07:00
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config AUDIT_ARCH
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bool
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default y
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2006-12-08 17:36:22 +07:00
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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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2006-12-08 17:37:49 +07:00
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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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2005-04-17 05:20:36 +07:00
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source "init/Kconfig"
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menu "Processor type and features"
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2006-01-12 04:46:18 +07:00
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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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2006-09-26 15:52:41 +07:00
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depends on PCI
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2006-01-12 04:46:18 +07:00
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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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2005-04-17 05:20:36 +07:00
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choice
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prompt "Processor family"
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2006-12-07 08:14:09 +07:00
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default GENERIC_CPU
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2005-04-17 05:20:36 +07:00
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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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2006-12-07 08:14:09 +07:00
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bool "Intel P4 / older Netburst based Xeon"
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2005-04-17 05:20:36 +07:00
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help
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2006-12-07 08:14:09 +07:00
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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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2005-04-17 05:20:36 +07:00
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<http://www.intel.com/technology/64bitextensions/>.
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2007-02-13 19:26:23 +07:00
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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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2006-12-07 08:14:09 +07:00
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using the cpu family field
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2007-02-13 19:26:23 +07:00
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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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2006-12-07 08:14:09 +07:00
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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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2007-02-13 19:26:23 +07:00
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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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2006-12-07 08:14:09 +07:00
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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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2005-04-17 05:20:36 +07:00
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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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2006-12-07 08:14:09 +07:00
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Run equally well on all x86-64 CPUs.
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2005-04-17 05:20:36 +07:00
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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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2006-12-07 08:14:09 +07:00
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default "64" if MK8 || MCORE2
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2005-04-17 05:20:36 +07:00
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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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2006-12-07 08:14:09 +07:00
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default "6" if MK8 || MCORE2
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2005-04-17 05:20:36 +07:00
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2006-04-08 00:50:09 +07:00
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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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2005-04-17 05:20:36 +07:00
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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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2006-09-27 15:50:53 +07:00
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select FW_LOADER
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2005-04-17 05:20:36 +07:00
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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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2006-09-27 15:50:51 +07:00
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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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2005-04-17 05:20:36 +07:00
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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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2006-03-27 16:15:22 +07:00
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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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2005-06-26 04:57:36 +07:00
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source "kernel/Kconfig.preempt"
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2005-11-05 23:25:54 +07:00
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config NUMA
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bool "Non Uniform Memory Access (NUMA) Support"
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2005-04-17 05:20:36 +07:00
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depends on SMP
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help
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2005-11-05 23:25:54 +07:00
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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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2006-09-26 15:52:41 +07:00
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depends on NUMA && PCI
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2005-11-05 23:25:54 +07:00
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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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2006-10-04 03:34:14 +07:00
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method to read the NUMA configuration directly from the builtin
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2005-11-05 23:25:54 +07:00
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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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2006-04-11 12:53:53 +07:00
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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
|
|
|
|
|
2005-11-05 23:25:54 +07:00
|
|
|
# Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig.
|
|
|
|
|
|
|
|
config X86_64_ACPI_NUMA
|
|
|
|
bool "ACPI NUMA detection"
|
|
|
|
depends on NUMA
|
|
|
|
select ACPI
|
2006-03-29 05:04:00 +07:00
|
|
|
select PCI
|
2005-11-05 23:25:54 +07:00
|
|
|
select ACPI_NUMA
|
|
|
|
default y
|
|
|
|
help
|
|
|
|
Enable ACPI SRAT based node topology detection.
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
config NUMA_EMU
|
2005-11-05 23:25:54 +07:00
|
|
|
bool "NUMA emulation"
|
|
|
|
depends on NUMA
|
2005-04-17 05:20:36 +07:00
|
|
|
help
|
|
|
|
Enable NUMA emulation. A flat machine will be split
|
|
|
|
into virtual nodes when booted with "numa=fake=N", where N is the
|
|
|
|
number of nodes. This is only useful for debugging.
|
|
|
|
|
2005-06-23 14:07:43 +07:00
|
|
|
config ARCH_DISCONTIGMEM_ENABLE
|
2005-04-17 05:20:36 +07:00
|
|
|
bool
|
|
|
|
depends on NUMA
|
|
|
|
default y
|
|
|
|
|
2005-06-23 14:08:05 +07:00
|
|
|
config ARCH_DISCONTIGMEM_DEFAULT
|
|
|
|
def_bool y
|
|
|
|
depends on NUMA
|
|
|
|
|
|
|
|
config ARCH_SPARSEMEM_ENABLE
|
|
|
|
def_bool y
|
2006-01-17 13:03:41 +07:00
|
|
|
depends on (NUMA || EXPERIMENTAL)
|
|
|
|
|
|
|
|
config ARCH_MEMORY_PROBE
|
|
|
|
def_bool y
|
|
|
|
depends on MEMORY_HOTPLUG
|
2005-06-23 14:08:05 +07:00
|
|
|
|
|
|
|
config ARCH_FLATMEM_ENABLE
|
|
|
|
def_bool y
|
|
|
|
depends on !NUMA
|
|
|
|
|
2005-06-23 14:07:43 +07:00
|
|
|
source "mm/Kconfig"
|
|
|
|
|
2006-10-01 13:27:05 +07:00
|
|
|
config MEMORY_HOTPLUG_RESERVE
|
|
|
|
def_bool y
|
|
|
|
depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
|
|
|
|
|
2005-06-23 14:08:05 +07:00
|
|
|
config HAVE_ARCH_EARLY_PFN_TO_NID
|
|
|
|
def_bool y
|
2006-01-17 13:03:41 +07:00
|
|
|
depends on NUMA
|
2005-06-23 14:08:05 +07:00
|
|
|
|
2006-03-27 16:15:34 +07:00
|
|
|
config OUT_OF_LINE_PFN_TO_PAGE
|
|
|
|
def_bool y
|
|
|
|
depends on DISCONTIGMEM
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
config NR_CPUS
|
|
|
|
int "Maximum number of CPUs (2-256)"
|
2006-03-25 22:30:58 +07:00
|
|
|
range 2 255
|
2005-04-17 05:20:36 +07:00
|
|
|
depends on SMP
|
|
|
|
default "8"
|
|
|
|
help
|
|
|
|
This allows you to specify the maximum number of CPUs which this
|
|
|
|
kernel will support. Current maximum is 256 CPUs due to
|
|
|
|
APIC addressing limits. Less depending on the hardware.
|
|
|
|
|
|
|
|
This is purely to save memory - each supported CPU requires
|
|
|
|
memory in the static kernel configuration.
|
|
|
|
|
2005-06-26 04:55:00 +07:00
|
|
|
config HOTPLUG_CPU
|
|
|
|
bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
|
|
|
|
depends on SMP && HOTPLUG && EXPERIMENTAL
|
|
|
|
help
|
|
|
|
Say Y here to experiment with turning CPUs off and on. CPUs
|
|
|
|
can be controlled through /sys/devices/system/cpu/cpu#.
|
|
|
|
Say N if you want to disable CPU hotplug.
|
|
|
|
|
2006-06-29 16:24:27 +07:00
|
|
|
config ARCH_ENABLE_MEMORY_HOTPLUG
|
|
|
|
def_bool y
|
2005-06-26 04:55:00 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
config HPET_TIMER
|
|
|
|
bool
|
|
|
|
default y
|
|
|
|
help
|
|
|
|
Use the IA-PC HPET (High Precision Event Timer) to manage
|
|
|
|
time in preference to the PIT and RTC, if a HPET is
|
|
|
|
present. The HPET provides a stable time base on SMP
|
|
|
|
systems, unlike the TSC, but it is more expensive to access,
|
|
|
|
as it is off-chip. You can find the HPET spec at
|
2005-09-21 23:55:44 +07:00
|
|
|
<http://www.intel.com/hardwaredesign/hpetspec.htm>.
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
config HPET_EMULATE_RTC
|
|
|
|
bool "Provide RTC interrupt"
|
|
|
|
depends on HPET_TIMER && RTC=y
|
|
|
|
|
2006-06-26 18:57:22 +07:00
|
|
|
# Mark as embedded because too many people got it wrong.
|
|
|
|
# The code disables itself when not needed.
|
|
|
|
config IOMMU
|
|
|
|
bool "IOMMU support" if EMBEDDED
|
2005-07-29 11:15:32 +07:00
|
|
|
default y
|
2006-01-12 04:44:42 +07:00
|
|
|
select SWIOTLB
|
2006-06-23 04:47:35 +07:00
|
|
|
select AGP
|
2005-04-17 05:20:36 +07:00
|
|
|
depends on PCI
|
|
|
|
help
|
2006-06-26 18:57:22 +07:00
|
|
|
Support for full DMA access of devices with 32bit memory access only
|
|
|
|
on systems with more than 3GB. This is usually needed for USB,
|
|
|
|
sound, many IDE/SATA chipsets and some other devices.
|
|
|
|
Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
|
2007-02-13 19:26:21 +07:00
|
|
|
based hardware IOMMU and a software bounce buffer based IOMMU used
|
|
|
|
on Intel systems and as fallback.
|
2006-06-26 18:57:22 +07:00
|
|
|
The code is only active when needed (enough memory and limited
|
|
|
|
device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
|
|
|
|
too.
|
|
|
|
|
2006-06-26 18:58:14 +07:00
|
|
|
config CALGARY_IOMMU
|
|
|
|
bool "IBM Calgary IOMMU support"
|
|
|
|
select SWIOTLB
|
|
|
|
depends on PCI && EXPERIMENTAL
|
|
|
|
help
|
|
|
|
Support for hardware IOMMUs in IBM's xSeries x366 and x460
|
|
|
|
systems. Needed to run systems with more than 3GB of memory
|
|
|
|
properly with 32-bit PCI devices that do not support DAC
|
|
|
|
(Double Address Cycle). Calgary also supports bus level
|
|
|
|
isolation, where all DMAs pass through the IOMMU. This
|
|
|
|
prevents them from going anywhere except their intended
|
|
|
|
destination. This catches hard-to-find kernel bugs and
|
|
|
|
mis-behaving drivers and devices that do not use the DMA-API
|
|
|
|
properly to set up their DMA buffers. The IOMMU can be
|
|
|
|
turned off at boot time with the iommu=off parameter.
|
|
|
|
Normally the kernel will make the right choice by itself.
|
|
|
|
If unsure, say Y.
|
|
|
|
|
2006-12-07 08:14:07 +07:00
|
|
|
config CALGARY_IOMMU_ENABLED_BY_DEFAULT
|
|
|
|
bool "Should Calgary be enabled by default?"
|
2007-01-02 01:55:45 +07:00
|
|
|
default y
|
2006-12-07 08:14:07 +07:00
|
|
|
depends on CALGARY_IOMMU
|
|
|
|
help
|
2007-01-02 01:55:45 +07:00
|
|
|
Should Calgary be enabled by default? if you choose 'y', Calgary
|
2006-12-07 08:14:07 +07:00
|
|
|
will be used (if it exists). If you choose 'n', Calgary will not be
|
|
|
|
used even if it exists. If you choose 'n' and would like to use
|
|
|
|
Calgary anyway, pass 'iommu=calgary' on the kernel command line.
|
2007-01-02 01:55:45 +07:00
|
|
|
If unsure, say Y.
|
2006-12-07 08:14:07 +07:00
|
|
|
|
2006-06-26 18:57:22 +07:00
|
|
|
# need this always selected by IOMMU for the VIA workaround
|
2005-04-17 05:20:36 +07:00
|
|
|
config SWIOTLB
|
|
|
|
bool
|
2007-02-13 19:26:21 +07:00
|
|
|
help
|
|
|
|
Support for software bounce buffers used on x86-64 systems
|
|
|
|
which don't have a hardware IOMMU (e.g. the current generation
|
|
|
|
of Intel's x86-64 CPUs). Using this PCI devices which can only
|
|
|
|
access 32-bits of memory can be used on systems with more than
|
|
|
|
3 GB of memory. If unsure, say Y.
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
config X86_MCE
|
|
|
|
bool "Machine check support" if EMBEDDED
|
|
|
|
default y
|
|
|
|
help
|
|
|
|
Include a machine check error handler to report hardware errors.
|
|
|
|
This version will require the mcelog utility to decode some
|
|
|
|
machine check error logs. See
|
|
|
|
ftp://ftp.x86-64.org/pub/linux/tools/mcelog
|
|
|
|
|
|
|
|
config X86_MCE_INTEL
|
|
|
|
bool "Intel MCE features"
|
|
|
|
depends on X86_MCE && X86_LOCAL_APIC
|
|
|
|
default y
|
|
|
|
help
|
|
|
|
Additional support for intel specific MCE features such as
|
|
|
|
the thermal monitor.
|
|
|
|
|
2005-11-05 23:25:53 +07:00
|
|
|
config X86_MCE_AMD
|
|
|
|
bool "AMD MCE features"
|
|
|
|
depends on X86_MCE && X86_LOCAL_APIC
|
|
|
|
default y
|
|
|
|
help
|
|
|
|
Additional support for AMD specific MCE features such as
|
|
|
|
the DRAM Error Threshold.
|
|
|
|
|
2005-06-26 04:58:02 +07:00
|
|
|
config KEXEC
|
2006-09-26 15:52:40 +07:00
|
|
|
bool "kexec system call"
|
2005-06-26 04:58:02 +07:00
|
|
|
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
|
2006-06-29 12:32:47 +07:00
|
|
|
but it is independent of the system firmware. And like a reboot
|
2005-06-26 04:58:02 +07:00
|
|
|
you can start any kernel with it, not just Linux.
|
|
|
|
|
2006-06-29 12:32:47 +07:00
|
|
|
The name comes from the similarity to the exec system call.
|
2005-06-26 04:58:02 +07:00
|
|
|
|
|
|
|
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.
|
|
|
|
|
2006-01-10 11:51:49 +07:00
|
|
|
config CRASH_DUMP
|
|
|
|
bool "kernel crash dumps (EXPERIMENTAL)"
|
|
|
|
depends on EXPERIMENTAL
|
|
|
|
help
|
2006-09-26 15:52:35 +07:00
|
|
|
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
|
2006-01-10 11:51:49 +07:00
|
|
|
|
2006-01-10 11:51:52 +07:00
|
|
|
config PHYSICAL_START
|
|
|
|
hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
|
|
|
|
default "0x1000000" if CRASH_DUMP
|
2006-03-25 22:30:13 +07:00
|
|
|
default "0x200000"
|
2006-01-10 11:51:52 +07:00
|
|
|
help
|
|
|
|
This gives the physical address where the kernel is loaded. Normally
|
2006-03-25 22:30:13 +07:00
|
|
|
for regular kernels this value is 0x200000 (2MB). But in the case
|
2006-01-10 11:51:52 +07:00
|
|
|
of kexec on panic the fail safe kernel needs to run at a different
|
|
|
|
address than the panic-ed kernel. This option is used to set the load
|
|
|
|
address for kernels used to capture crash dump on being kexec'ed
|
|
|
|
after panic. The default value for crash dump kernels is
|
|
|
|
0x1000000 (16MB). This can also 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.
|
|
|
|
|
|
|
|
Don't change this unless you know what you are doing.
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
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.
|
|
|
|
|
2006-09-26 15:52:38 +07:00
|
|
|
config CC_STACKPROTECTOR
|
2006-12-12 02:14:15 +07:00
|
|
|
bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
|
2006-09-26 15:52:38 +07:00
|
|
|
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.
|
|
|
|
|
2005-06-23 14:08:25 +07:00
|
|
|
source kernel/Kconfig.hz
|
|
|
|
|
2006-03-25 22:30:49 +07:00
|
|
|
config REORDER
|
|
|
|
bool "Function reordering"
|
|
|
|
default n
|
|
|
|
help
|
|
|
|
This option enables the toolchain to reorder functions for a more
|
|
|
|
optimal TLB usage. If you have pretty much any version of binutils,
|
|
|
|
this can increase your kernel build time by roughly one minute.
|
|
|
|
|
2006-06-26 18:56:40 +07:00
|
|
|
config K8_NB
|
|
|
|
def_bool y
|
2006-06-26 18:57:22 +07:00
|
|
|
depends on AGP_AMD64 || IOMMU || (PCI && NUMA)
|
2006-06-26 18:56:40 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
endmenu
|
|
|
|
|
|
|
|
#
|
|
|
|
# Use the generic interrupt handling code in kernel/irq/:
|
|
|
|
#
|
|
|
|
config GENERIC_HARDIRQS
|
|
|
|
bool
|
|
|
|
default y
|
|
|
|
|
|
|
|
config GENERIC_IRQ_PROBE
|
|
|
|
bool
|
|
|
|
default y
|
|
|
|
|
2005-05-04 11:39:22 +07:00
|
|
|
# we have no ISA slots, but we do have ISA-style DMA.
|
|
|
|
config ISA_DMA_API
|
|
|
|
bool
|
|
|
|
default y
|
|
|
|
|
[PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity
When handling writes to /proc/irq, current code is re-programming rte
entries directly. This is not recommended and could potentially cause
chipset's to lockup, or cause missing interrupts.
CONFIG_IRQ_BALANCE does this correctly, where it re-programs only when the
interrupt is pending. The same needs to be done for /proc/irq handling as well.
Otherwise user space irq balancers are really not doing the right thing.
- Changed pending_irq_balance_cpumask to pending_irq_migrate_cpumask for
lack of a generic name.
- added move_irq out of IRQ_BALANCE, and added this same to X86_64
- Added new proc handler for write, so we can do deferred write at irq
handling time.
- Display of /proc/irq/XX/smp_affinity used to display CPU_MASKALL, instead
it now shows only active cpu masks, or exactly what was set.
- Provided a common move_irq implementation, instead of duplicating
when using generic irq framework.
Tested on i386/x86_64 and ia64 with CONFIG_PCI_MSI turned on and off.
Tested UP builds as well.
MSI testing: tbd: I have cards, need to look for a x-over cable, although I
did test an earlier version of this patch. Will test in a couple days.
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Acked-by: Zwane Mwaikambo <zwane@holomorphy.com>
Grudgingly-acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Coywolf Qi Hunt <coywolf@lovecn.org>
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 05:16:15 +07:00
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config GENERIC_PENDING_IRQ
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bool
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depends on GENERIC_HARDIRQS && SMP
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default y
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2005-04-17 05:20:36 +07:00
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menu "Power management options"
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source kernel/power/Kconfig
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source "drivers/acpi/Kconfig"
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source "arch/x86_64/kernel/cpufreq/Kconfig"
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endmenu
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menu "Bus options (PCI etc.)"
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config PCI
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bool "PCI support"
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# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
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config PCI_DIRECT
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bool
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depends on PCI
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default y
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config PCI_MMCONFIG
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bool "Support mmconfig PCI config space access"
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2005-05-27 17:48:50 +07:00
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depends on PCI && ACPI
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2005-04-17 05:20:36 +07:00
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source "drivers/pci/pcie/Kconfig"
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source "drivers/pci/Kconfig"
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source "drivers/pcmcia/Kconfig"
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source "drivers/pci/hotplug/Kconfig"
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endmenu
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menu "Executable file formats / Emulations"
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source "fs/Kconfig.binfmt"
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config IA32_EMULATION
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bool "IA32 Emulation"
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help
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Include code to run 32-bit programs under a 64-bit kernel. You should likely
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turn this on, unless you're 100% sure that you don't have any 32-bit programs
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left.
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config IA32_AOUT
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2005-11-05 23:25:54 +07:00
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tristate "IA32 a.out support"
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2005-04-17 05:20:36 +07:00
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depends on IA32_EMULATION
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help
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Support old a.out binaries in the 32bit emulation.
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config COMPAT
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bool
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depends on IA32_EMULATION
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default y
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config SYSVIPC_COMPAT
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bool
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depends on COMPAT && SYSVIPC
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default y
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endmenu
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2005-07-12 11:03:49 +07:00
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source "net/Kconfig"
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2005-04-17 05:20:36 +07:00
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source drivers/Kconfig
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source "drivers/firmware/Kconfig"
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source fs/Kconfig
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2005-11-07 15:59:14 +07:00
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menu "Instrumentation Support"
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depends on EXPERIMENTAL
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2005-04-17 05:20:36 +07:00
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source "arch/x86_64/oprofile/Kconfig"
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2005-11-07 15:59:14 +07:00
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config KPROBES
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bool "Kprobes (EXPERIMENTAL)"
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2006-10-02 16:17:30 +07:00
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depends on KALLSYMS && EXPERIMENTAL && MODULES
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2005-11-07 15:59:14 +07:00
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help
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Kprobes allows you to trap at almost any kernel address and
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execute a callback function. register_kprobe() establishes
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a probepoint and specifies the callback. Kprobes is useful
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for kernel debugging, non-intrusive instrumentation and testing.
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If in doubt, say "N".
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endmenu
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2005-04-17 05:20:36 +07:00
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source "arch/x86_64/Kconfig.debug"
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source "security/Kconfig"
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source "crypto/Kconfig"
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source "lib/Kconfig"
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