path: root/arch/ia64/Kconfig

#
# For a description of the syntax of this configuration file,
# see Documentation/kbuild/kconfig-language.txt.
#

mainmenu "IA-64 Linux Kernel Configuration"

source "init/Kconfig"

menu "Processor type and features"

config IA64
	bool
	default y
	help
	  The Itanium Processor Family is Intel's 64-bit successor to
	  the 32-bit X86 line.  The IA-64 Linux project has a home
	  page at <http://www.linuxia64.org/> and a mailing list at
	  <linux-ia64@vger.kernel.org>.

config 64BIT
	bool
	default y

config MMU
	bool
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool
	default y

config GENERIC_CALIBRATE_DELAY
	bool
	default y

config TIME_INTERPOLATION
	bool
	default y

config EFI
	bool
	default y

config GENERIC_IOMAP
	bool
	default y

config SCHED_NO_NO_OMIT_FRAME_POINTER
	bool
	default y

config IA64_UNCACHED_ALLOCATOR
	bool
	select GENERIC_ALLOCATOR

choice
	prompt "System type"
	default IA64_GENERIC

config IA64_GENERIC
	bool "generic"
	select NUMA
	select ACPI_NUMA
	select VIRTUAL_MEM_MAP
	select DISCONTIGMEM
	help
	  This selects the system type of your hardware.  A "generic" kernel
	  will run on any supported IA-64 system.  However, if you configure
	  a kernel for your specific system, it will be faster and smaller.

	  generic		For any supported IA-64 system
	  DIG-compliant		For DIG ("Developer's Interface Guide") compliant systems
	  HP-zx1/sx1000		For HP systems
	  HP-zx1/sx1000+swiotlb	For HP systems with (broken) DMA-constrained devices.
	  SGI-SN2		For SGI Altix systems
	  Ski-simulator		For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>

	  If you don't know what to do, choose "generic".

config IA64_DIG
	bool "DIG-compliant"

config IA64_HP_ZX1
	bool "HP-zx1/sx1000"
	help
	  Build a kernel that runs on HP zx1 and sx1000 systems.  This adds
	  support for the HP I/O MMU.

config IA64_HP_ZX1_SWIOTLB
	bool "HP-zx1/sx1000 with software I/O TLB"
	help
	  Build a kernel that runs on HP zx1 and sx1000 systems even when they
	  have broken PCI devices which cannot DMA to full 32 bits.  Apart
	  from support for the HP I/O MMU, this includes support for the software
	  I/O TLB, which allows supporting the broken devices at the expense of
	  wasting some kernel memory (about 2MB by default).

config IA64_SGI_SN2
	bool "SGI-SN2"
	help
	  Selecting this option will optimize the kernel for use on sn2 based
	  systems, but the resulting kernel binary will not run on other
	  types of ia64 systems.  If you have an SGI Altix system, it's safe
	  to select this option.  If in doubt, select ia64 generic support
	  instead.

config IA64_HP_SIM
	bool "Ski-simulator"

endchoice

choice
	prompt "Processor type"
	default ITANIUM

config ITANIUM
	bool "Itanium"
	help
	  Select your IA-64 processor type.  The default is Itanium.
	  This choice is safe for all IA-64 systems, but may not perform
	  optimally on systems with, say, Itanium 2 or newer processors.

config MCKINLEY
	bool "Itanium 2"
	help
	  Select this to configure for an Itanium 2 (McKinley) processor.

endchoice

choice
	prompt "Kernel page size"
	default IA64_PAGE_SIZE_16KB

config IA64_PAGE_SIZE_4KB
	bool "4KB"
	help
	  This lets you select the page size of the kernel.  For best IA-64
	  performance, a page size of 8KB or 16KB is recommended.  For best
	  IA-32 compatibility, a page size of 4KB should be selected (the vast
	  majority of IA-32 binaries work perfectly fine with a larger page
	  size).  For Itanium 2 or newer systems, a page size of 64KB can also
	  be selected.

	  4KB                For best IA-32 compatibility
	  8KB                For best IA-64 performance
	  16KB               For best IA-64 performance
	  64KB               Requires Itanium 2 or newer processor.

	  If you don't know what to do, choose 16KB.

config IA64_PAGE_SIZE_8KB
	bool "8KB"

config IA64_PAGE_SIZE_16KB
	bool "16KB"

config IA64_PAGE_SIZE_64KB
	depends on !ITANIUM
	bool "64KB"

endchoice

source kernel/Kconfig.hz

config IA64_BRL_EMU
	bool
	depends on ITANIUM
	default y

# align cache-sensitive data to 128 bytes
config IA64_L1_CACHE_SHIFT
	int
	default "7" if MCKINLEY
	default "6" if ITANIUM

# align cache-sensitive data to 64 bytes
config NUMA
	bool "NUMA support"
	depends on !IA64_HP_SIM
	default y if IA64_SGI_SN2
	select ACPI_NUMA
	help
	  Say Y to compile the kernel to support NUMA (Non-Uniform Memory
	  Access).  This option is for configuring high-end multiprocessor
	  server systems.  If in doubt, say N.

config VIRTUAL_MEM_MAP
	bool "Virtual mem map"
	default y if !IA64_HP_SIM
	help
	  Say Y to compile the kernel with support for a virtual mem map.
	  This code also only takes effect if a memory hole of greater than
	  1 Gb is found during boot.  You must turn this option on if you
	  require the DISCONTIGMEM option for your machine. If you are
	  unsure, say Y.

config HOLES_IN_ZONE
	bool
	default y if VIRTUAL_MEM_MAP

config ARCH_DISCONTIGMEM_ENABLE
	bool "Discontiguous memory support"
	depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
	default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
	help
	  Say Y to support efficient handling of discontiguous physical memory,
	  for architectures which are either NUMA (Non-Uniform Memory Access)
	  or have huge holes in the physical address space for other reasons.
	  See <file:Documentation/vm/numa> for more.

config IA64_CYCLONE
	bool "Cyclone (EXA) Time Source support"
	help
	  Say Y here to enable support for IBM EXA Cyclone time source.
	  If you're unsure, answer N.

config IOSAPIC
	bool
	depends on !IA64_HP_SIM
	default y

config IA64_SGI_SN_XP
	tristate "Support communication between SGI SSIs"
	select IA64_UNCACHED_ALLOCATOR
	help
	  An SGI machine can be divided into multiple Single System
	  Images which act independently of each other and have
	  hardware based memory protection from the others.  Enabling
	  this feature will allow for direct communication between SSIs
	  based on a network adapter and DMA messaging.

config FORCE_MAX_ZONEORDER
	int
	default "18"

config SMP
	bool "Symmetric multi-processing support"
	help
	  This enables support for systems with more than one CPU. If you have
	  a system with only one CPU, say N.  If you have a system with more
	  than one CPU, say Y.

	  If you say N here, the kernel will run on single and multiprocessor
	  systems, but will use only one CPU of a multiprocessor system.  If
	  you say Y here, the kernel will run on many, but not all,
	  single processor systems.  On a single processor system, the kernel
	  will run faster if you say N here.

	  See also the <file:Documentation/smp.txt> and the SMP-HOWTO
	  available at <http://www.tldp.org/docs.html#howto>.

	  If you don't know what to do here, say N.

config NR_CPUS
	int "Maximum number of CPUs (2-512)"
	range 2 512
	depends on SMP
	default "64"
	help
	  You should set this to the number of CPUs in your system, but
	  keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
	  only use 2 CPUs on a >2 CPU system.  Setting this to a value larger
	  than 64 will cause the use of a CPU mask array, causing a small
	  performance hit.

config HOTPLUG_CPU
	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
	depends on SMP && EXPERIMENTAL
	select HOTPLUG
	default n
	---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.

config SCHED_SMT
	bool "SMT scheduler support"
	depends on SMP
	default off
	help
	  Improves the CPU scheduler's decision making when dealing with
	  Intel IA64 chips with MultiThreading at a cost of slightly increased
	  overhead in some places. If unsure say N here.

config PREEMPT
	bool "Preemptible Kernel"
        help
          This option reduces the latency of the kernel when reacting to
          real-time or interactive events by allowing a low priority process to
          be preempted even if it is in kernel mode executing a system call.
          This allows applications to run more reliably even when the system is
          under load.

          Say Y here if you are building a kernel for a desktop, embedded
          or real-time system.  Say N if you are unsure.

source "mm/Kconfig"

config HAVE_DEC_LOCK
	bool
	depends on (SMP || PREEMPT)
	default y

config IA32_SUPPORT
	bool "Support for Linux/x86 binaries"
	help
	  IA-64 processors can execute IA-32 (X86) instructions.  By
	  saying Y here, the kernel will include IA-32 system call
	  emulation support which makes it possible to transparently
	  run IA-32 Linux binaries on an IA-64 Linux system.
	  If in doubt, say Y.

config COMPAT
	bool
	depends on IA32_SUPPORT
	default y

config IA64_MCA_RECOVERY
	tristate "MCA recovery from errors other than TLB."

config PERFMON
	bool "Performance monitor support"
	help
	  Selects whether support for the IA-64 performance monitor hardware
	  is included in the kernel.  This makes some kernel data-structures a
	  little bigger and slows down execution a bit, but it is generally
	  a good idea to turn this on.  If you're unsure, say Y.

config IA64_PALINFO
	tristate "/proc/pal support"
	help
	  If you say Y here, you are able to get PAL (Processor Abstraction
	  Layer) information in /proc/pal.  This contains useful information
	  about the processors in your systems, such as cache and TLB sizes
	  and the PAL firmware version in use.

	  To use this option, you have to ensure that the "/proc file system
	  support" (CONFIG_PROC_FS) is enabled, too.

config ACPI_DEALLOCATE_IRQ
	bool
	depends on IOSAPIC && EXPERIMENTAL
	default y

source "drivers/firmware/Kconfig"

source "fs/Kconfig.binfmt"

endmenu

menu "Power management and ACPI"

config PM
	bool "Power Management support"
	depends on !IA64_HP_SIM
	default y
	help
	  "Power Management" means that parts of your computer are shut
	  off or put into a power conserving "sleep" mode if they are not
	  being used.  There are two competing standards for doing this: APM
	  and ACPI.  If you want to use either one, say Y here and then also
	  to the requisite support below.

	  Power Management is most important for battery powered laptop
	  computers; if you have a laptop, check out the Linux Laptop home
	  page on the WWW at <http://www.linux-on-laptops.com/> and the
	  Battery Powered Linux mini-HOWTO, available from
	  <http://www.tldp.org/docs.html#howto>.

	  Note that, even if you say N here, Linux on the x86 architecture
	  will issue the hlt instruction if nothing is to be done, thereby
	  sending the processor to sleep and saving power.

config ACPI
	bool
	depends on !IA64_HP_SIM
	default y

if !IA64_HP_SIM

source "drivers/acpi/Kconfig"

endif

endmenu

if !IA64_HP_SIM

menu "Bus options (PCI, PCMCIA)"

config PCI
	bool "PCI support"
	help
	  Real IA-64 machines all have PCI/PCI-X/PCI Express busses.  Say Y
	  here unless you are using a simulator without PCI support.

config PCI_DOMAINS
	bool
	default PCI

source "drivers/pci/Kconfig"

source "drivers/pci/hotplug/Kconfig"

source "drivers/pcmcia/Kconfig"

endmenu

endif

source "net/Kconfig"

source "drivers/Kconfig"

source "fs/Kconfig"

source "lib/Kconfig"

#
# Use the generic interrupt handling code in kernel/irq/:
#
config GENERIC_HARDIRQS
	bool
	default y

config GENERIC_IRQ_PROBE
	bool
	default y

source "arch/ia64/hp/sim/Kconfig"

source "arch/ia64/oprofile/Kconfig"

source "arch/ia64/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"