# # 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 SWIOTLB bool default y config RWSEM_XCHGADD_ALGORITHM bool default y config GENERIC_FIND_NEXT_BIT bool default y config GENERIC_CALIBRATE_DELAY bool default y config TIME_INTERPOLATION bool default y config DMI 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 config DMA_IS_DMA32 bool default y config DMA_IS_NORMAL bool depends on IA64_SGI_SN2 default y choice prompt "System type" default IA64_GENERIC config IA64_GENERIC bool "generic" select ACPI select PCI select NUMA select ACPI_NUMA 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 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 choice prompt "Page Table Levels" default PGTABLE_3 config PGTABLE_3 bool "3 Levels" config PGTABLE_4 depends on !IA64_PAGE_SIZE_64KB bool "4 Levels" 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 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" depends on IA64_GENERIC || IA64_SGI_SN2 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 "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE range 11 17 if !HUGETLB_PAGE default "17" if HUGETLB_PAGE default "11" 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 (2-1024)" range 2 1024 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 ARCH_ENABLE_MEMORY_HOTPLUG def_bool y config SCHED_SMT bool "SMT scheduler support" depends on SMP 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 PERMIT_BSP_REMOVE bool "Support removal of Bootstrap Processor" depends on HOTPLUG_CPU default n ---help--- Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU support. config FORCE_CPEI_RETARGET bool "Force assumption that CPEI can be re-targetted" depends on PERMIT_BSP_REMOVE default n ---help--- Say Y if you need to force the assumption that CPEI can be re-targetted to any cpu in the system. This hint is available via ACPI 3.0 specifications. Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP. This option it useful to enable this feature on older BIOS's as well. You can also enable this by using boot command line option force_cpei=1. 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 ARCH_SELECT_MEMORY_MODEL def_bool y config ARCH_DISCONTIGMEM_ENABLE def_bool y 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 ARCH_FLATMEM_ENABLE def_bool y config ARCH_SPARSEMEM_ENABLE def_bool y depends on ARCH_DISCONTIGMEM_ENABLE config ARCH_DISCONTIGMEM_DEFAULT def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) depends on ARCH_DISCONTIGMEM_ENABLE config NUMA bool "NUMA support" depends on !IA64_HP_SIM && !FLATMEM 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 NODES_SHIFT int "Max num nodes shift(3-10)" range 3 10 default "8" depends on NEED_MULTIPLE_NODES help This option specifies the maximum number of nodes in your SSI system. MAX_NUMNODES will be 2^(This value). If in doubt, use the default. # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent. # VIRTUAL_MEM_MAP has been retained for historical reasons. config VIRTUAL_MEM_MAP bool "Virtual mem map" depends on !SPARSEMEM 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 HAVE_ARCH_EARLY_PFN_TO_NID def_bool y depends on NEED_MULTIPLE_NODES config HAVE_ARCH_NODEDATA_EXTENSION def_bool y depends on NUMA 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 SGI_SN def_bool y if (IA64_SGI_SN2 || IA64_GENERIC) source "drivers/sn/Kconfig" source "drivers/firmware/Kconfig" source "fs/Kconfig.binfmt" endmenu menu "Power management and ACPI" source "kernel/power/Kconfig" source "drivers/acpi/Kconfig" if PM source "arch/ia64/kernel/cpufreq/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/pcie/Kconfig" 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 config GENERIC_PENDING_IRQ bool depends on GENERIC_HARDIRQS && SMP default y config IRQ_PER_CPU bool default y source "arch/ia64/hp/sim/Kconfig" menu "Instrumentation Support" depends on EXPERIMENTAL source "arch/ia64/oprofile/Kconfig" config KPROBES bool "Kprobes (EXPERIMENTAL)" depends on 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/ia64/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig"