# # 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 and a mailing list at . config 64BIT bool default y config MMU bool default y config RWSEM_XCHGADD_ALGORITHM bool default y config TIME_INTERPOLATION bool default y config EFI bool default y 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 SGI-SN2 For SGI Altix systems Ski-simulator For the HP simulator 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_SGI_SN2 bool "SGI-SN2" 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 config IA64_BRL_EMU bool depends on ITANIUM default y config ITANIUM_BSTEP_SPECIFIC bool "Itanium B-step specific code" depends on ITANIUM help Select this option to build a kernel for an Itanium prototype system with a B-step CPU. You have a B-step CPU if the "revision" field in /proc/cpuinfo has a value in the range from 1 to 4. # 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 MCKINLEY_ASTEP_SPECIFIC bool "McKinley A-step specific code" depends on MCKINLEY help Select this option to build a kernel for an IA-64 McKinley prototype system with any A-stepping CPU. config MCKINLEY_A0_SPECIFIC bool "McKinley A0/A1-step specific code" depends on MCKINLEY_ASTEP_SPECIFIC help Select this option to build a kernel for an IA-64 McKinley prototype system with an A0 or A1 stepping CPU. config NUMA bool "NUMA support" depends on !IA64_HP_SIM default y if IA64_SGI_SN2 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 DISCONTIGMEM bool "Discontiguous memory support" depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC) && 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 for more. config IA64_CYCLONE bool "Support Cyclone(EXA) Time Source" 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_SIM bool "SGI Medusa Simulator Support" depends on IA64_SGI_SN2 help If you are compiling a kernel that will run under SGI's IA-64 simulator (Medusa) then say Y, otherwise say N. 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 and the SMP-HOWTO available at . 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 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. 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 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. source "drivers/firmware/Kconfig" source "fs/Kconfig.binfmt" endmenu menu "Power management and ACPI" config PM bool "Power Management support" depends on IA64_GENERIC || IA64_DIG || IA64_HP_ZX1 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 and the Battery Powered Linux mini-HOWTO, available from . 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 Find out whether you have a PCI motherboard. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or VESA. If you have PCI, say Y, otherwise N. The PCI-HOWTO, available from , contains valuable information about which PCI hardware does work under Linux and which doesn't. config PCI_DOMAINS bool default PCI source "drivers/pci/Kconfig" source "drivers/pci/hotplug/Kconfig" source "drivers/pcmcia/Kconfig" endmenu endif source "drivers/Kconfig" source "fs/Kconfig" source "lib/Kconfig" source "arch/ia64/hp/sim/Kconfig" source "arch/ia64/oprofile/Kconfig" menu "Kernel hacking" choice prompt "Physical memory granularity" default IA64_GRANULE_64MB config IA64_GRANULE_16MB bool "16MB" help IA-64 identity-mapped regions use a large page size called "granules". Select "16MB" for a small granule size. Select "64MB" for a large granule size. This is the current default. config IA64_GRANULE_64MB bool "64MB" depends on !(IA64_GENERIC || IA64_HP_ZX1) endchoice config DEBUG_KERNEL bool "Kernel debugging" help Say Y here if you are developing drivers or trying to debug and identify kernel problems. config IA64_PRINT_HAZARDS bool "Print possible IA-64 dependency violations to console" depends on DEBUG_KERNEL help Selecting this option prints more information for Illegal Dependency Faults, that is, for Read-after-Write (RAW), Write-after-Write (WAW), or Write-after-Read (WAR) violations. This option is ignored if you are compiling for an Itanium A step processor (CONFIG_ITANIUM_ASTEP_SPECIFIC). If you're unsure, select Y. config DISABLE_VHPT bool "Disable VHPT" depends on DEBUG_KERNEL help The Virtual Hash Page Table (VHPT) enhances virtual address translation performance. Normally you want the VHPT active but you can select this option to disable the VHPT for debugging. If you're unsure, answer N. config MAGIC_SYSRQ bool "Magic SysRq key" depends on DEBUG_KERNEL help If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in . Don't say Y unless you really know what this hack does. config DEBUG_SLAB bool "Debug memory allocations" depends on DEBUG_KERNEL help Say Y here to have the kernel do limited verification on memory allocation as well as poisoning memory on free to catch use of freed memory. config DEBUG_SPINLOCK bool "Spinlock debugging" depends on DEBUG_KERNEL help Say Y here and build SMP to catch missing spinlock initialization and certain other kinds of spinlock errors commonly made. This is best used in conjunction with the NMI watchdog so that spinlock deadlocks are also debuggable. config DEBUG_SPINLOCK_SLEEP bool "Sleep-inside-spinlock checking" help If you say Y here, various routines which may sleep will become very noisy if they are called with a spinlock held. config IA64_DEBUG_CMPXCHG bool "Turn on compare-and-exchange bug checking (slow!)" depends on DEBUG_KERNEL help Selecting this option turns on bug checking for the IA-64 compare-and-exchange instructions. This is slow! Itaniums from step B3 or later don't have this problem. If you're unsure, select N. config IA64_DEBUG_IRQ bool "Turn on irq debug checks (slow!)" depends on DEBUG_KERNEL help Selecting this option turns on bug checking for the IA-64 irq_save and restore instructions. It's useful for tracking down spinlock problems, but slow! If you're unsure, select N. config DEBUG_INFO bool "Compile the kernel with debug info" depends on DEBUG_KERNEL help If you say Y here the resulting kernel image will include debugging info resulting in a larger kernel image. Say Y here only if you plan to use gdb to debug the kernel. If you don't debug the kernel, you can say N. config SYSVIPC_COMPAT bool depends on COMPAT && SYSVIPC default y endmenu source "security/Kconfig" source "crypto/Kconfig"