2 # For a description of the syntax of this configuration file,
3 # see Documentation/kbuild/kconfig-language.txt.
6 mainmenu "IA-64 Linux Kernel Configuration"
10 source "kernel/Kconfig.freezer"
12 menu "Processor type and features"
16 select PCI if (!IA64_HP_SIM)
17 select ACPI if (!IA64_HP_SIM)
18 select PM if (!IA64_HP_SIM)
19 select ARCH_SUPPORTS_MSI
20 select HAVE_UNSTABLE_SCHED_CLOCK
24 select HAVE_KRETPROBES
25 select HAVE_FTRACE_MCOUNT_RECORD
26 select HAVE_DYNAMIC_FTRACE if (!ITANIUM)
27 select HAVE_FUNCTION_TRACER
30 select HAVE_ARCH_TRACEHOOK
31 select HAVE_DMA_API_DEBUG
34 The Itanium Processor Family is Intel's 64-bit successor to
35 the 32-bit X86 line. The IA-64 Linux project has a home
36 page at <http://www.linuxia64.org/> and a mailing list at
37 <linux-ia64@vger.kernel.org>.
41 select ATA_NONSTANDARD if ATA
46 depends on !IA64_SGI_SN2
62 config GENERIC_LOCKBREAK
65 config RWSEM_XCHGADD_ALGORITHM
69 config HUGETLB_PAGE_SIZE_VARIABLE
71 depends on HUGETLB_PAGE
74 config GENERIC_FIND_NEXT_BIT
78 config GENERIC_CALIBRATE_DELAY
86 config GENERIC_TIME_VSYSCALL
90 config HAVE_LEGACY_PER_CPU_AREA
93 config HAVE_SETUP_PER_CPU_AREA
108 config SCHED_OMIT_FRAME_POINTER
112 config IA64_UNCACHED_ALLOCATOR
114 select GENERIC_ALLOCATOR
116 config ARCH_USES_PG_UNCACHED
118 depends on IA64_UNCACHED_ALLOCATOR
124 menuconfig PARAVIRT_GUEST
125 bool "Paravirtualized guest support"
127 Say Y here to get to see options related to running Linux under
128 various hypervisors. This option alone does not add any kernel code.
130 If you say N, all options in this submenu will be skipped and disabled.
135 bool "Enable paravirtualization code"
136 depends on PARAVIRT_GUEST
141 This changes the kernel so it can modify itself when it is run
142 under a hypervisor, potentially improving performance significantly
143 over full virtualization. However, when run without a hypervisor
144 the kernel is theoretically slower and slightly larger.
147 source "arch/ia64/xen/Kconfig"
163 This selects the system type of your hardware. A "generic" kernel
164 will run on any supported IA-64 system. However, if you configure
165 a kernel for your specific system, it will be faster and smaller.
167 generic For any supported IA-64 system
168 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
169 DIG+Intel+IOMMU For DIG systems with Intel IOMMU
170 HP-zx1/sx1000 For HP systems
171 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
172 SGI-SN2 For SGI Altix systems
173 SGI-UV For SGI UV systems
174 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
175 Xen-domU For xen domU system
177 If you don't know what to do, choose "generic".
184 bool "DIG+Intel+IOMMU"
191 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
192 support for the HP I/O MMU.
194 config IA64_HP_ZX1_SWIOTLB
195 bool "HP-zx1/sx1000 with software I/O TLB"
198 Build a kernel that runs on HP zx1 and sx1000 systems even when they
199 have broken PCI devices which cannot DMA to full 32 bits. Apart
200 from support for the HP I/O MMU, this includes support for the software
201 I/O TLB, which allows supporting the broken devices at the expense of
202 wasting some kernel memory (about 2MB by default).
209 Selecting this option will optimize the kernel for use on sn2 based
210 systems, but the resulting kernel binary will not run on other
211 types of ia64 systems. If you have an SGI Altix system, it's safe
212 to select this option. If in doubt, select ia64 generic support
221 Selecting this option will optimize the kernel for use on UV based
222 systems, but the resulting kernel binary will not run on other
223 types of ia64 systems. If you have an SGI UV system, it's safe
224 to select this option. If in doubt, select ia64 generic support
231 config IA64_XEN_GUEST
236 Build a kernel that runs on Xen guest domain. At this moment only
237 16KB page size in supported.
242 prompt "Processor type"
248 Select your IA-64 processor type. The default is Itanium.
249 This choice is safe for all IA-64 systems, but may not perform
250 optimally on systems with, say, Itanium 2 or newer processors.
255 Select this to configure for an Itanium 2 (McKinley) processor.
260 prompt "Kernel page size"
261 default IA64_PAGE_SIZE_16KB
263 config IA64_PAGE_SIZE_4KB
266 This lets you select the page size of the kernel. For best IA-64
267 performance, a page size of 8KB or 16KB is recommended. For best
268 IA-32 compatibility, a page size of 4KB should be selected (the vast
269 majority of IA-32 binaries work perfectly fine with a larger page
270 size). For Itanium 2 or newer systems, a page size of 64KB can also
273 4KB For best IA-32 compatibility
274 8KB For best IA-64 performance
275 16KB For best IA-64 performance
276 64KB Requires Itanium 2 or newer processor.
278 If you don't know what to do, choose 16KB.
280 config IA64_PAGE_SIZE_8KB
283 config IA64_PAGE_SIZE_16KB
286 config IA64_PAGE_SIZE_64KB
293 prompt "Page Table Levels"
300 depends on !IA64_PAGE_SIZE_64KB
311 source kernel/Kconfig.hz
319 # align cache-sensitive data to 128 bytes
320 config IA64_L1_CACHE_SHIFT
322 default "7" if MCKINLEY
323 default "6" if ITANIUM
326 bool "Cyclone (EXA) Time Source support"
328 Say Y here to enable support for IBM EXA Cyclone time source.
329 If you're unsure, answer N.
333 depends on !IA64_HP_SIM
336 config FORCE_MAX_ZONEORDER
337 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
338 range 11 17 if !HUGETLB_PAGE
339 default "17" if HUGETLB_PAGE
342 config VIRT_CPU_ACCOUNTING
343 bool "Deterministic task and CPU time accounting"
346 Select this option to enable more accurate task and CPU time
347 accounting. This is done by reading a CPU counter on each
348 kernel entry and exit and on transitions within the kernel
349 between system, softirq and hardirq state, so there is a
350 small performance impact.
351 If in doubt, say N here.
354 bool "Symmetric multi-processing support"
355 select USE_GENERIC_SMP_HELPERS
357 This enables support for systems with more than one CPU. If you have
358 a system with only one CPU, say N. If you have a system with more
361 If you say N here, the kernel will run on single and multiprocessor
362 systems, but will use only one CPU of a multiprocessor system. If
363 you say Y here, the kernel will run on many, but not all,
364 single processor systems. On a single processor system, the kernel
365 will run faster if you say N here.
367 See also the SMP-HOWTO available at
368 <http://www.tldp.org/docs.html#howto>.
370 If you don't know what to do here, say N.
373 int "Maximum number of CPUs (2-4096)"
378 You should set this to the number of CPUs in your system, but
379 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
380 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
381 than 64 will cause the use of a CPU mask array, causing a small
385 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
386 depends on SMP && EXPERIMENTAL
390 Say Y here to experiment with turning CPUs off and on. CPUs
391 can be controlled through /sys/devices/system/cpu/cpu#.
392 Say N if you want to disable CPU hotplug.
394 config ARCH_ENABLE_MEMORY_HOTPLUG
397 config ARCH_ENABLE_MEMORY_HOTREMOVE
401 bool "SMT scheduler support"
404 Improves the CPU scheduler's decision making when dealing with
405 Intel IA64 chips with MultiThreading at a cost of slightly increased
406 overhead in some places. If unsure say N here.
408 config PERMIT_BSP_REMOVE
409 bool "Support removal of Bootstrap Processor"
410 depends on HOTPLUG_CPU
413 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
416 config FORCE_CPEI_RETARGET
417 bool "Force assumption that CPEI can be re-targetted"
418 depends on PERMIT_BSP_REMOVE
421 Say Y if you need to force the assumption that CPEI can be re-targetted to
422 any cpu in the system. This hint is available via ACPI 3.0 specifications.
423 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
424 This option it useful to enable this feature on older BIOS's as well.
425 You can also enable this by using boot command line option force_cpei=1.
427 source "kernel/Kconfig.preempt"
431 config ARCH_SELECT_MEMORY_MODEL
434 config ARCH_DISCONTIGMEM_ENABLE
437 Say Y to support efficient handling of discontiguous physical memory,
438 for architectures which are either NUMA (Non-Uniform Memory Access)
439 or have huge holes in the physical address space for other reasons.
440 See <file:Documentation/vm/numa> for more.
442 config ARCH_FLATMEM_ENABLE
445 config ARCH_SPARSEMEM_ENABLE
447 depends on ARCH_DISCONTIGMEM_ENABLE
448 select SPARSEMEM_VMEMMAP_ENABLE
450 config ARCH_DISCONTIGMEM_DEFAULT
451 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
452 depends on ARCH_DISCONTIGMEM_ENABLE
456 depends on !IA64_HP_SIM && !FLATMEM
457 default y if IA64_SGI_SN2
458 select ACPI_NUMA if ACPI
460 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
461 Access). This option is for configuring high-end multiprocessor
462 server systems. If in doubt, say N.
465 int "Max num nodes shift(3-10)"
468 depends on NEED_MULTIPLE_NODES
470 This option specifies the maximum number of nodes in your SSI system.
471 MAX_NUMNODES will be 2^(This value).
472 If in doubt, use the default.
474 config ARCH_POPULATES_NODE_MAP
477 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
478 # VIRTUAL_MEM_MAP has been retained for historical reasons.
479 config VIRTUAL_MEM_MAP
480 bool "Virtual mem map"
481 depends on !SPARSEMEM
482 default y if !IA64_HP_SIM
484 Say Y to compile the kernel with support for a virtual mem map.
485 This code also only takes effect if a memory hole of greater than
486 1 Gb is found during boot. You must turn this option on if you
487 require the DISCONTIGMEM option for your machine. If you are
492 default y if VIRTUAL_MEM_MAP
494 config HAVE_ARCH_EARLY_PFN_TO_NID
495 def_bool NUMA && SPARSEMEM
497 config HAVE_ARCH_NODEDATA_EXTENSION
501 config ARCH_PROC_KCORE_TEXT
503 depends on PROC_KCORE
506 bool "Support for Linux/x86 binaries"
508 IA-64 processors can execute IA-32 (X86) instructions. By
509 saying Y here, the kernel will include IA-32 system call
510 emulation support which makes it possible to transparently
511 run IA-32 Linux binaries on an IA-64 Linux system.
516 depends on IA32_SUPPORT
519 config COMPAT_FOR_U64_ALIGNMENT
522 config IA64_MCA_RECOVERY
523 tristate "MCA recovery from errors other than TLB."
526 bool "Performance monitor support"
528 Selects whether support for the IA-64 performance monitor hardware
529 is included in the kernel. This makes some kernel data-structures a
530 little bigger and slows down execution a bit, but it is generally
531 a good idea to turn this on. If you're unsure, say Y.
534 tristate "/proc/pal support"
536 If you say Y here, you are able to get PAL (Processor Abstraction
537 Layer) information in /proc/pal. This contains useful information
538 about the processors in your systems, such as cache and TLB sizes
539 and the PAL firmware version in use.
541 To use this option, you have to ensure that the "/proc file system
542 support" (CONFIG_PROC_FS) is enabled, too.
544 config IA64_MC_ERR_INJECT
545 tristate "MC error injection support"
547 Adds support for MC error injection. If enabled, the kernel
548 will provide a sysfs interface for user applications to
549 call MC error injection PAL procedures to inject various errors.
550 This is a useful tool for MCA testing.
552 If you're unsure, do not select this option.
555 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
558 bool "ESI (Extensible SAL Interface) support"
560 If you say Y here, support is built into the kernel to
561 make ESI calls. ESI calls are used to support vendor-specific
562 firmware extensions, such as the ability to inject memory-errors
563 for test-purposes. If you're unsure, say N.
565 config IA64_HP_AML_NFW
566 bool "Support ACPI AML calls to native firmware"
568 This driver installs a global ACPI Operation Region handler for
569 region 0xA1. AML methods can use this OpRegion to call arbitrary
570 native firmware functions. The driver installs the OpRegion
571 handler if there is an HPQ5001 device or if the user supplies
572 the "force" module parameter, e.g., with the "aml_nfw.force"
573 kernel command line option.
575 source "drivers/sn/Kconfig"
578 bool "kexec system call (EXPERIMENTAL)"
579 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
581 kexec is a system call that implements the ability to shutdown your
582 current kernel, and to start another kernel. It is like a reboot
583 but it is independent of the system firmware. And like a reboot
584 you can start any kernel with it, not just Linux.
586 The name comes from the similarity to the exec system call.
588 It is an ongoing process to be certain the hardware in a machine
589 is properly shutdown, so do not be surprised if this code does not
590 initially work for you. It may help to enable device hotplugging
591 support. As of this writing the exact hardware interface is
592 strongly in flux, so no good recommendation can be made.
595 bool "kernel crash dumps"
596 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
598 Generate crash dump after being started by kexec.
600 source "drivers/firmware/Kconfig"
602 source "fs/Kconfig.binfmt"
606 menu "Power management and ACPI options"
608 source "kernel/power/Kconfig"
610 source "drivers/acpi/Kconfig"
614 source "arch/ia64/kernel/cpufreq/Kconfig"
622 menu "Bus options (PCI, PCMCIA)"
627 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
628 here unless you are using a simulator without PCI support.
636 source "drivers/pci/pcie/Kconfig"
638 source "drivers/pci/Kconfig"
640 source "drivers/pci/hotplug/Kconfig"
642 source "drivers/pcmcia/Kconfig"
645 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
646 depends on IA64_GENERIC && ACPI && EXPERIMENTAL
648 DMA remapping (DMAR) devices support enables independent address
649 translations for Direct Memory Access (DMA) from devices.
650 These DMA remapping devices are reported via ACPI tables
651 and include PCI device scope covered by these DMA
654 config DMAR_DEFAULT_ON
656 prompt "Enable DMA Remapping Devices by default"
659 Selecting this option will enable a DMAR device at boot time if
660 one is found. If this option is not selected, DMAR support can
661 be enabled by passing intel_iommu=on to the kernel. It is
662 recommended you say N here while the DMAR code remains
671 source "drivers/Kconfig"
673 source "arch/ia64/hp/sim/Kconfig"
676 tristate "Memory special operations driver"
678 select IA64_UNCACHED_ALLOCATOR
680 If you have an ia64 and you want to enable memory special
681 operations support (formerly known as fetchop), say Y here,
686 source "arch/ia64/Kconfig.debug"
688 source "security/Kconfig"
690 source "crypto/Kconfig"
692 source "arch/ia64/kvm/Kconfig"
697 # Use the generic interrupt handling code in kernel/irq/:
699 config GENERIC_HARDIRQS
703 config GENERIC_IRQ_PROBE
707 config GENERIC_PENDING_IRQ
709 depends on GENERIC_HARDIRQS && SMP
717 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)