bool
default y
+config GENERIC_TIME
+ bool
+ default y
+
+config GENERIC_TIME_VSYSCALL
+ bool
+ default y
+
+config GENERIC_CMOS_UPDATE
+ bool
+ default y
+
+config CLOCKSOURCE_WATCHDOG
+ bool
+ default y
+
+config GENERIC_CLOCKEVENTS
+ bool
+ default y
+
+config GENERIC_CLOCKEVENTS_BROADCAST
+ 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
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"
+source "kernel/time/Kconfig"
+
choice
prompt "Subarchitecture Type"
default X86_PC
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
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
- <http://www.intel.com/technology/64bitextensions/>.
+ Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey
+ Xeon CPUs with Intel 64bit which is compatible with x86-64.
+ Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the
+ Netburst core and shouldn't use this option. You can distinguish them
+ using the cpu family field
+ in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one.
+
+config MCORE2
+ bool "Intel Core2 / newer Xeon"
+ help
+ Optimize for Intel Core2 and newer Xeons (51xx)
+ You can distinguish the newer Xeons from the older ones using
+ the cpu family field in /proc/cpuinfo. 15 is an older Xeon
+ (use CONFIG_MPSC then), 6 is a newer one.
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
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
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 || EXPERIMENTAL)
+ select SPARSEMEM_VMEMMAP_ENABLE
config ARCH_MEMORY_PROBE
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
depends on DISCONTIGMEM
config NR_CPUS
- int "Maximum number of CPUs (2-256)"
+ int "Maximum number of CPUs (2-255)"
range 2 255
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
+ kernel will support. Current maximum is 255 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.
+config PHYSICAL_ALIGN
+ hex
+ default "0x200000"
+
config HOTPLUG_CPU
- bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
+ bool "Support for suspend on SMP and 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.
+ This is also required for suspend/hibernation on SMP systems.
+ Say N if you want to disable CPU hotplug and don't need to
+ suspend.
+
+config ARCH_ENABLE_MEMORY_HOTPLUG
+ def_bool y
config HPET_TIMER
bool
<http://www.intel.com/hardwaredesign/hpetspec.htm>.
config HPET_EMULATE_RTC
- bool "Provide RTC interrupt"
+ bool
depends on HPET_TIMER && RTC=y
+ default y
-config GART_IOMMU
- bool "K8 GART 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 for hardware IOMMU in AMD's Opteron/Athlon64 Processors
- and for the bounce buffering software 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
- northbridge and a software emulation used on other systems without
- hardware IOMMU. If unsure, say Y.
-
-# need this always enabled with GART_IOMMU for the VIA workaround
+ 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 hardware 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.
+
+config CALGARY_IOMMU_ENABLED_BY_DEFAULT
+ bool "Should Calgary be enabled by default?"
+ default y
+ depends on CALGARY_IOMMU
+ help
+ 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
- default y
- depends on GART_IOMMU
+ 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.
config X86_MCE
bool "Machine check support" if EMBEDDED
the DRAM Error Threshold.
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
bool "kernel crash dumps (EXPERIMENTAL)"
depends on EXPERIMENTAL
help
- Generate crash dump after being started by kexec.
+ 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, or it must be built as a relocatable image
+ (CONFIG_RELOCATABLE=y).
+ 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 the kernel runs from the address
+ it has been loaded at and the 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 "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
+ 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
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
source kernel/power/Kconfig
+config ARCH_HIBERNATION_HEADER
+ bool
+ depends on HIBERNATION
+ default y
+
source "drivers/acpi/Kconfig"
-source "arch/x86_64/kernel/cpufreq/Kconfig"
+source "arch/x86/kernel/cpu/cpufreq/Kconfig_64"
endmenu
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 "Support mmconfig PCI config space access"
depends on PCI && ACPI
+config PCI_DOMAINS
+ bool
+ depends on PCI
+ default y
+
source "drivers/pci/pcie/Kconfig"
source "drivers/pci/Kconfig"
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.
+ 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
default y
+config COMPAT_FOR_U64_ALIGNMENT
+ def_bool COMPAT
+
config SYSVIPC_COMPAT
bool
depends on COMPAT && SYSVIPC
source fs/Kconfig
menu "Instrumentation Support"
- depends on EXPERIMENTAL
-source "arch/x86_64/oprofile/Kconfig"
+source "arch/x86/oprofile/Kconfig"
config KPROBES
- bool "Kprobes (EXPERIMENTAL)"
- depends on EXPERIMENTAL && MODULES
+ 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
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff