config RWSEM_XCHGADD_ALGORITHM
bool
-config X86_CMPXCHG
+config GENERIC_CALIBRATE_DELAY
bool
default y
-config EARLY_PRINTK
+config X86_CMPXCHG
bool
default y
- help
- Write kernel log output directly into the VGA buffer or to a serial
- port.
- This is useful for kernel debugging when your machine crashes very
- early before the console code is initialized. For normal operation
- it is not recommended because it looks ugly and doesn't cooperate
- with klogd/syslogd or the X server. You should normally N here,
- unless you want to debug such a crash.
-
-config HPET_TIMER
+config EARLY_PRINTK
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 RTC, but it is more expensive to access,
- as it is off-chip. You can find the HPET spec at
- <http://www.intel.com/labs/platcomp/hpet/hpetspec.htm>.
-
- If unsure, say Y.
-
-config HPET_EMULATE_RTC
- def_bool HPET_TIMER && RTC=y
config GENERIC_ISA_DMA
bool
Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs.
config MPSC
- bool "Intel x86-64"
+ bool "Intel EM64T"
help
- Optimize for Intel IA32 with 64bit extension CPUs
- (Prescott/Nocona/Potomac)
+ Optimize for Intel Pentium 4 and Xeon CPUs with Intel
+ Extended Memory 64 Technology(EM64T). For details see
+ <http://www.intel.com/technology/64bitextensions/>.
config GENERIC_CPU
bool "Generic-x86-64"
Say Y here if you are feeling brave and building a kernel for a
desktop, embedded or real-time system. Say N if you are unsure.
+config PREEMPT_BKL
+ bool "Preempt The Big Kernel Lock"
+ depends on PREEMPT
+ default y
+ help
+ This option reduces the latency of the kernel by making the
+ big kernel lock preemptible.
+
+ Say Y here if you are building a kernel for a desktop system.
+ Say N if you are unsure.
+
config SCHED_SMT
bool "SMT (Hyperthreading) scheduler support"
depends on SMP
- default off
+ default n
help
SMT scheduler support improves the CPU scheduler's decision making
when dealing with Intel Pentium 4 chips with HyperThreading at a
config K8_NUMA
bool "K8 NUMA support"
+ select NUMA
depends on SMP
help
Enable NUMA (Non Unified Memory Architecture) support for
This code is recommended on all multiprocessor Opteron systems
and normally doesn't hurt on others.
+config NUMA_EMU
+ bool "NUMA emulation support"
+ select NUMA
+ depends on SMP
+ 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.
+
config DISCONTIGMEM
bool
- depends on K8_NUMA
+ depends on NUMA
default y
config NUMA
bool
- depends on K8_NUMA
- default y
+ default n
config HAVE_DEC_LOCK
bool
depends on SMP
default y
-# actually 64 maximum, but you need to fix the APIC code first
-# to use clustered mode or whatever your big iron needs
config NR_CPUS
- int "Maximum number of CPUs (2-8)"
- range 2 8
+ int "Maximum number of CPUs (2-256)"
+ range 2 256
depends on SMP
default "8"
help
This allows you to specify the maximum number of CPUs which this
- kernel will support. The maximum supported value is 32 and the
- minimum value which makes sense is 2.
+ 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.
+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
+ <http://www.intel.com/labs/platcomp/hpet/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"
+ depends on PCI
help
Support the K8 IOMMU. Needed to run systems with more than 4GB of memory
properly with 32-bit PCI devices that do not support DAC (Double Address
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.
+
+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.
+
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
menu "Power management options"
config PCI_MMCONFIG
bool "Support mmconfig PCI config space access"
- depends on PCI
+ depends on PCI && ACPI
select ACPI_BOOT
config UNORDERED_IO
from i386. Requires that the driver writer used memory barriers
properly.
+source "drivers/pci/pcie/Kconfig"
+
source "drivers/pci/Kconfig"
source "drivers/pcmcia/Kconfig"
git://git.onelab.eu / linux-2.6.git / blobdiff