bool
default y
+config ZONE_DMA32
+ bool
+ default y
+
+config LOCKDEP_SUPPORT
+ bool
+ default y
+
+config STACKTRACE_SUPPORT
+ bool
+ default y
+
config SEMAPHORE_SLEEPERS
bool
default y
bool
default y
+config ZONE_DMA
+ bool
+ default y
+
config ISA
bool
config RWSEM_XCHGADD_ALGORITHM
bool
+config GENERIC_HWEIGHT
+ bool
+ default y
+
config GENERIC_CALIBRATE_DELAY
bool
default y
bool
default y
+config ARCH_POPULATES_NODE_MAP
+ def_bool y
+
+config DMI
+ bool
+ default y
+
+config AUDIT_ARCH
+ bool
+ default y
+
+config GENERIC_BUG
+ bool
+ default y
+ depends on BUG
+
+config ARCH_HAS_ILOG2_U32
+ bool
+ default n
+
+config ARCH_HAS_ILOG2_U64
+ bool
+ default n
+
source "init/Kconfig"
menu "Processor type and features"
choice
+ prompt "Subarchitecture Type"
+ default X86_PC
+
+config X86_PC
+ bool "PC-compatible"
+ help
+ Choose this option if your computer is a standard PC or compatible.
+
+config X86_VSMP
+ bool "Support for ScaleMP vSMP"
+ depends on PCI
+ help
+ Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
+ supposed to run on these EM64T-based machines. Only choose this option
+ if you have one of these machines.
+
+endchoice
+
+choice
prompt "Processor family"
- default MK8
+ default GENERIC_CPU
config MK8
bool "AMD-Opteron/Athlon64"
Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs.
config MPSC
- bool "Intel EM64T"
+ bool "Intel P4 / older Netburst based Xeon"
help
- Optimize for Intel Pentium 4 and Xeon CPUs with Intel
- Extended Memory 64 Technology(EM64T). For details see
+ Optimize for Intel Pentium 4 and older Nocona/Dempsey Xeon CPUs
+ with Intel Extended Memory 64 Technology(EM64T). For details see
<http://www.intel.com/technology/64bitextensions/>.
+ Note the the latest Xeons (Xeon 51xx and 53xx) are not based on the
+ Netburst core and shouldn't use this option. You can distingush them
+ using the cpu family field
+ in /proc/cpuinfo. Family 15 is a older Xeon, Family 6 a newer one
+ (this rule only applies to system that support EM64T)
+
+config MCORE2
+ bool "Intel Core2 / newer Xeon"
+ help
+ Optimize for Intel Core2 and newer Xeons (51xx)
+ You can distingush the newer Xeons from the older ones using
+ the cpu family field in /proc/cpuinfo. 15 is a older Xeon
+ (use CONFIG_MPSC then), 6 is a newer one. This rule only
+ applies to CPUs that support EM64T.
config GENERIC_CPU
bool "Generic-x86-64"
help
Generic x86-64 CPU.
+ Run equally well on all x86-64 CPUs.
endchoice
config X86_L1_CACHE_BYTES
int
default "128" if GENERIC_CPU || MPSC
- default "64" if MK8
+ default "64" if MK8 || MCORE2
config X86_L1_CACHE_SHIFT
int
default "7" if GENERIC_CPU || MPSC
- default "6" if MK8
+ default "6" if MK8 || MCORE2
+
+config X86_INTERNODE_CACHE_BYTES
+ int
+ default "4096" if X86_VSMP
+ default X86_L1_CACHE_BYTES if !X86_VSMP
config X86_TSC
bool
config MICROCODE
tristate "/dev/cpu/microcode - Intel CPU microcode support"
+ select FW_LOADER
---help---
If you say Y here the 'File systems' section, you will be
able to update the microcode on Intel processors. You will
If you use modprobe or kmod you may also want to add the line
'alias char-major-10-184 microcode' to your /etc/modules.conf file.
+config MICROCODE_OLD_INTERFACE
+ bool
+ depends on MICROCODE
+ default y
+
config X86_MSR
tristate "/dev/cpu/*/msr - Model-specific register support"
help
cost of slightly increased overhead in some places. If unsure say
N here.
+config SCHED_MC
+ bool "Multi-core scheduler support"
+ depends on SMP
+ default y
+ help
+ Multi-core scheduler support improves the CPU scheduler's decision
+ making when dealing with multi-core CPU chips at a cost of slightly
+ increased overhead in some places. If unsure say N here.
+
source "kernel/Kconfig.preempt"
config NUMA
config K8_NUMA
bool "Old style AMD Opteron NUMA detection"
- depends on NUMA
+ depends on NUMA && PCI
default y
help
Enable K8 NUMA node topology detection. You should say Y here if
you have a multi processor AMD K8 system. This uses an old
- method to read the NUMA configurtion directly from the builtin
+ method to read the NUMA configuration directly from the builtin
Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
instead, which also takes priority if both are compiled in.
+config NODES_SHIFT
+ int
+ default "6"
+ depends on NEED_MULTIPLE_NODES
+
# 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
+ select PCI
select ACPI_NUMA
default y
help
depends on NUMA
default y
-
-config ARCH_DISCONTIGMEM_ENABLE
- def_bool y
- depends on NUMA
-
config ARCH_DISCONTIGMEM_DEFAULT
def_bool y
depends on NUMA
config ARCH_SPARSEMEM_ENABLE
def_bool y
- depends on NUMA
+ depends on (NUMA || EXPERIMENTAL)
+
+config ARCH_MEMORY_PROBE
+ def_bool y
+ depends on MEMORY_HOTPLUG
config ARCH_FLATMEM_ENABLE
def_bool y
source "mm/Kconfig"
+config MEMORY_HOTPLUG_RESERVE
+ def_bool y
+ depends on (MEMORY_HOTPLUG && DISCONTIGMEM)
+
config HAVE_ARCH_EARLY_PFN_TO_NID
def_bool y
+ depends on NUMA
+
+config OUT_OF_LINE_PFN_TO_PAGE
+ def_bool y
+ depends on DISCONTIGMEM
config NR_CPUS
int "Maximum number of CPUs (2-256)"
- range 2 256
+ range 2 255
depends on SMP
default "8"
help
can be controlled through /sys/devices/system/cpu/cpu#.
Say N if you want to disable CPU hotplug.
+config ARCH_ENABLE_MEMORY_HOTPLUG
+ def_bool y
config HPET_TIMER
bool
as it is off-chip. You can find the HPET spec at
<http://www.intel.com/hardwaredesign/hpetspec.htm>.
-config X86_PM_TIMER
- bool "PM timer"
- depends on ACPI
- default y
- help
- Support the ACPI PM timer for time keeping. This is slow,
- but is useful on some chipsets without HPET on systems with more
- than one CPU. On a single processor or single socket multi core
- system it is normally not required.
- When the PM timer is active 64bit vsyscalls are disabled
- and should not be enabled (/proc/sys/kernel/vsyscall64 should
- not be changed).
- The kernel selects the PM timer only as a last resort, so it is
- useful to enable just in case.
-
config HPET_EMULATE_RTC
bool "Provide RTC interrupt"
depends on HPET_TIMER && RTC=y
-config GART_IOMMU
- bool "IOMMU support"
+# Mark as embedded because too many people got it wrong.
+# The code disables itself when not needed.
+config IOMMU
+ bool "IOMMU support" if EMBEDDED
default y
+ select SWIOTLB
+ select AGP
depends on PCI
help
- Support the IOMMU. Needed to run systems with more than 3GB of memory
- properly with 32-bit PCI devices that do not support DAC (Double Address
- Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter.
- Normally the kernel will take the right choice by itself.
- This option includes a driver for the AMD Opteron/Athlon64 IOMMU
- and a software emulation used on some other systems.
+ 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
+ based IOMMU and a software bounce buffer based IOMMU used on Intel
+ systems and as fallback.
+ The code is only active when needed (enough memory and limited
+ device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
+ too.
+
+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.
-# need this always enabled with GART_IOMMU for the VIA workaround
-config SWIOTLB
- bool
- depends on GART_IOMMU
- default y
-
-config DUMMY_IOMMU
- bool
- depends on !GART_IOMMU && !SWIOTLB
+config CALGARY_IOMMU_ENABLED_BY_DEFAULT
+ bool "Should Calgary be enabled by default?"
default y
+ depends on CALGARY_IOMMU
help
- Don't use IOMMU code. This will cause problems when you have more than 4GB
- of memory and any 32-bit devices. Don't turn on unless you know what you
- are doing.
+ Should Calgary be enabled by default? if you choose 'y', Calgary
+ 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.
+ If unsure, say Y.
+
+# need this always selected by IOMMU for the VIA workaround
+config SWIOTLB
+ bool
config X86_MCE
bool "Machine check support" if EMBEDDED
Additional support for AMD specific MCE features such as
the DRAM Error Threshold.
-config PHYSICAL_START
- hex "Physical address where the kernel is loaded" if EMBEDDED
- default "0x100000"
- help
- This gives the physical address where the kernel is loaded.
- Primarily used in the case of kexec on panic where the
- fail safe kernel needs to run at a different address than
- the panic-ed kernel.
-
- Don't change this unless you know what you are doing.
-
config KEXEC
- bool "kexec system call (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ bool "kexec system call"
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot
- but it is indepedent of the system firmware. And like a reboot
+ but it is independent of the system firmware. And like a reboot
you can start any kernel with it, not just Linux.
- The name comes from the similiarity to the exec system call.
+ 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
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 PHYSICAL_START
+ hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
+ default "0x1000000" if CRASH_DUMP
+ default "0x200000"
+ help
+ This gives the physical address where the kernel is loaded. Normally
+ for regular kernels this value is 0x200000 (2MB). But in the case
+ 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.
+
config SECCOMP
bool "Enable seccomp to safely compute untrusted bytecode"
depends on PROC_FS
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 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.
+
+config K8_NB
+ def_bool y
+ depends on AGP_AMD64 || IOMMU || (PCI && NUMA)
+
endmenu
#
bool "Support mmconfig PCI config space access"
depends on PCI && ACPI
-config UNORDERED_IO
- bool "Unordered IO mapping access"
- depends on EXPERIMENTAL
- help
- Use unordered stores to access IO memory mappings in device drivers.
- Still very experimental. When a driver works on IA64/ppc64/pa-risc it should
- work with this option, but it makes the drivers behave differently
- from i386. Requires that the driver writer used memory barriers
- properly.
-
source "drivers/pci/pcie/Kconfig"
source "drivers/pci/Kconfig"
depends on COMPAT && SYSVIPC
default y
-config UID16
- bool
- depends on IA32_EMULATION
- default y
-
endmenu
source "net/Kconfig"
source fs/Kconfig
+menu "Instrumentation Support"
+ depends on EXPERIMENTAL
+
source "arch/x86_64/oprofile/Kconfig"
+config KPROBES
+ bool "Kprobes (EXPERIMENTAL)"
+ depends on KALLSYMS && EXPERIMENTAL && MODULES
+ help
+ Kprobes allows you to trap at almost any kernel address and
+ execute a callback function. register_kprobe() establishes
+ a probepoint and specifies the callback. Kprobes is useful
+ for kernel debugging, non-intrusive instrumentation and testing.
+ If in doubt, say "N".
+endmenu
+
source "arch/x86_64/Kconfig.debug"
source "security/Kconfig"
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff