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 menu "Processor type and features"
14 select PCI if (!IA64_HP_SIM)
15 select ACPI if (!IA64_HP_SIM)
16 select PM if (!IA64_HP_SIM)
17 select ARCH_SUPPORTS_MSI
21 select HAVE_KRETPROBES
26 The Itanium Processor Family is Intel's 64-bit successor to
27 the 32-bit X86 line. The IA-64 Linux project has a home
28 page at <http://www.linuxia64.org/> and a mailing list at
29 <linux-ia64@vger.kernel.org>.
33 select ATA_NONSTANDARD if ATA
38 depends on !IA64_SGI_SN2
54 config GENERIC_LOCKBREAK
57 depends on SMP && PREEMPT
59 config RWSEM_XCHGADD_ALGORITHM
63 config HUGETLB_PAGE_SIZE_VARIABLE
65 depends on HUGETLB_PAGE
68 config GENERIC_FIND_NEXT_BIT
72 config GENERIC_CALIBRATE_DELAY
80 config GENERIC_TIME_VSYSCALL
84 config HAVE_SETUP_PER_CPU_AREA
99 config SCHED_NO_NO_OMIT_FRAME_POINTER
103 config IA64_UNCACHED_ALLOCATOR
105 select GENERIC_ALLOCATOR
122 This selects the system type of your hardware. A "generic" kernel
123 will run on any supported IA-64 system. However, if you configure
124 a kernel for your specific system, it will be faster and smaller.
126 generic For any supported IA-64 system
127 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
128 DIG+Intel+IOMMU For DIG systems with Intel IOMMU
129 HP-zx1/sx1000 For HP systems
130 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
131 SGI-SN2 For SGI Altix systems
132 SGI-UV For SGI UV systems
133 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
135 If you don't know what to do, choose "generic".
142 bool "DIG+Intel+IOMMU"
149 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
150 support for the HP I/O MMU.
152 config IA64_HP_ZX1_SWIOTLB
153 bool "HP-zx1/sx1000 with software I/O TLB"
156 Build a kernel that runs on HP zx1 and sx1000 systems even when they
157 have broken PCI devices which cannot DMA to full 32 bits. Apart
158 from support for the HP I/O MMU, this includes support for the software
159 I/O TLB, which allows supporting the broken devices at the expense of
160 wasting some kernel memory (about 2MB by default).
167 Selecting this option will optimize the kernel for use on sn2 based
168 systems, but the resulting kernel binary will not run on other
169 types of ia64 systems. If you have an SGI Altix system, it's safe
170 to select this option. If in doubt, select ia64 generic support
179 Selecting this option will optimize the kernel for use on UV based
180 systems, but the resulting kernel binary will not run on other
181 types of ia64 systems. If you have an SGI UV system, it's safe
182 to select this option. If in doubt, select ia64 generic support
192 prompt "Processor type"
198 Select your IA-64 processor type. The default is Itanium.
199 This choice is safe for all IA-64 systems, but may not perform
200 optimally on systems with, say, Itanium 2 or newer processors.
205 Select this to configure for an Itanium 2 (McKinley) processor.
210 prompt "Kernel page size"
211 default IA64_PAGE_SIZE_16KB
213 config IA64_PAGE_SIZE_4KB
216 This lets you select the page size of the kernel. For best IA-64
217 performance, a page size of 8KB or 16KB is recommended. For best
218 IA-32 compatibility, a page size of 4KB should be selected (the vast
219 majority of IA-32 binaries work perfectly fine with a larger page
220 size). For Itanium 2 or newer systems, a page size of 64KB can also
223 4KB For best IA-32 compatibility
224 8KB For best IA-64 performance
225 16KB For best IA-64 performance
226 64KB Requires Itanium 2 or newer processor.
228 If you don't know what to do, choose 16KB.
230 config IA64_PAGE_SIZE_8KB
233 config IA64_PAGE_SIZE_16KB
236 config IA64_PAGE_SIZE_64KB
243 prompt "Page Table Levels"
250 depends on !IA64_PAGE_SIZE_64KB
261 source kernel/Kconfig.hz
269 # align cache-sensitive data to 128 bytes
270 config IA64_L1_CACHE_SHIFT
272 default "7" if MCKINLEY
273 default "6" if ITANIUM
276 bool "Cyclone (EXA) Time Source support"
278 Say Y here to enable support for IBM EXA Cyclone time source.
279 If you're unsure, answer N.
283 depends on !IA64_HP_SIM
286 config FORCE_MAX_ZONEORDER
287 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
288 range 11 17 if !HUGETLB_PAGE
289 default "17" if HUGETLB_PAGE
292 config VIRT_CPU_ACCOUNTING
293 bool "Deterministic task and CPU time accounting"
296 Select this option to enable more accurate task and CPU time
297 accounting. This is done by reading a CPU counter on each
298 kernel entry and exit and on transitions within the kernel
299 between system, softirq and hardirq state, so there is a
300 small performance impact.
301 If in doubt, say N here.
304 bool "Symmetric multi-processing support"
305 select USE_GENERIC_SMP_HELPERS
307 This enables support for systems with more than one CPU. If you have
308 a system with only one CPU, say N. If you have a system with more
311 If you say N here, the kernel will run on single and multiprocessor
312 systems, but will use only one CPU of a multiprocessor system. If
313 you say Y here, the kernel will run on many, but not all,
314 single processor systems. On a single processor system, the kernel
315 will run faster if you say N here.
317 See also the SMP-HOWTO available at
318 <http://www.tldp.org/docs.html#howto>.
320 If you don't know what to do here, say N.
323 int "Maximum number of CPUs (2-4096)"
328 You should set this to the number of CPUs in your system, but
329 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
330 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
331 than 64 will cause the use of a CPU mask array, causing a small
335 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
336 depends on SMP && EXPERIMENTAL
340 Say Y here to experiment with turning CPUs off and on. CPUs
341 can be controlled through /sys/devices/system/cpu/cpu#.
342 Say N if you want to disable CPU hotplug.
344 config ARCH_ENABLE_MEMORY_HOTPLUG
347 config ARCH_ENABLE_MEMORY_HOTREMOVE
351 bool "SMT scheduler support"
354 Improves the CPU scheduler's decision making when dealing with
355 Intel IA64 chips with MultiThreading at a cost of slightly increased
356 overhead in some places. If unsure say N here.
358 config PERMIT_BSP_REMOVE
359 bool "Support removal of Bootstrap Processor"
360 depends on HOTPLUG_CPU
363 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
366 config FORCE_CPEI_RETARGET
367 bool "Force assumption that CPEI can be re-targetted"
368 depends on PERMIT_BSP_REMOVE
371 Say Y if you need to force the assumption that CPEI can be re-targetted to
372 any cpu in the system. This hint is available via ACPI 3.0 specifications.
373 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
374 This option it useful to enable this feature on older BIOS's as well.
375 You can also enable this by using boot command line option force_cpei=1.
377 source "kernel/Kconfig.preempt"
381 config ARCH_SELECT_MEMORY_MODEL
384 config ARCH_DISCONTIGMEM_ENABLE
387 Say Y to support efficient handling of discontiguous physical memory,
388 for architectures which are either NUMA (Non-Uniform Memory Access)
389 or have huge holes in the physical address space for other reasons.
390 See <file:Documentation/vm/numa> for more.
392 config ARCH_FLATMEM_ENABLE
395 config ARCH_SPARSEMEM_ENABLE
397 depends on ARCH_DISCONTIGMEM_ENABLE
398 select SPARSEMEM_VMEMMAP_ENABLE
400 config ARCH_DISCONTIGMEM_DEFAULT
401 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
402 depends on ARCH_DISCONTIGMEM_ENABLE
406 depends on !IA64_HP_SIM && !FLATMEM
407 default y if IA64_SGI_SN2
408 select ACPI_NUMA if ACPI
410 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
411 Access). This option is for configuring high-end multiprocessor
412 server systems. If in doubt, say N.
415 int "Max num nodes shift(3-10)"
418 depends on NEED_MULTIPLE_NODES
420 This option specifies the maximum number of nodes in your SSI system.
421 MAX_NUMNODES will be 2^(This value).
422 If in doubt, use the default.
424 config ARCH_POPULATES_NODE_MAP
427 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
428 # VIRTUAL_MEM_MAP has been retained for historical reasons.
429 config VIRTUAL_MEM_MAP
430 bool "Virtual mem map"
431 depends on !SPARSEMEM
432 default y if !IA64_HP_SIM
434 Say Y to compile the kernel with support for a virtual mem map.
435 This code also only takes effect if a memory hole of greater than
436 1 Gb is found during boot. You must turn this option on if you
437 require the DISCONTIGMEM option for your machine. If you are
442 default y if VIRTUAL_MEM_MAP
444 config HAVE_ARCH_EARLY_PFN_TO_NID
446 depends on NEED_MULTIPLE_NODES
448 config HAVE_ARCH_NODEDATA_EXTENSION
453 bool "Support for Linux/x86 binaries"
455 IA-64 processors can execute IA-32 (X86) instructions. By
456 saying Y here, the kernel will include IA-32 system call
457 emulation support which makes it possible to transparently
458 run IA-32 Linux binaries on an IA-64 Linux system.
463 depends on IA32_SUPPORT
466 config COMPAT_FOR_U64_ALIGNMENT
469 config IA64_MCA_RECOVERY
470 tristate "MCA recovery from errors other than TLB."
473 bool "Performance monitor support"
475 Selects whether support for the IA-64 performance monitor hardware
476 is included in the kernel. This makes some kernel data-structures a
477 little bigger and slows down execution a bit, but it is generally
478 a good idea to turn this on. If you're unsure, say Y.
481 tristate "/proc/pal support"
483 If you say Y here, you are able to get PAL (Processor Abstraction
484 Layer) information in /proc/pal. This contains useful information
485 about the processors in your systems, such as cache and TLB sizes
486 and the PAL firmware version in use.
488 To use this option, you have to ensure that the "/proc file system
489 support" (CONFIG_PROC_FS) is enabled, too.
491 config IA64_MC_ERR_INJECT
492 tristate "MC error injection support"
494 Adds support for MC error injection. If enabled, the kernel
495 will provide a sysfs interface for user applications to
496 call MC error injection PAL procedures to inject various errors.
497 This is a useful tool for MCA testing.
499 If you're unsure, do not select this option.
502 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
505 bool "ESI (Extensible SAL Interface) support"
507 If you say Y here, support is built into the kernel to
508 make ESI calls. ESI calls are used to support vendor-specific
509 firmware extensions, such as the ability to inject memory-errors
510 for test-purposes. If you're unsure, say N.
512 config IA64_HP_AML_NFW
513 bool "Support ACPI AML calls to native firmware"
515 This driver installs a global ACPI Operation Region handler for
516 region 0xA1. AML methods can use this OpRegion to call arbitrary
517 native firmware functions. The driver installs the OpRegion
518 handler if there is an HPQ5001 device or if the user supplies
519 the "force" module parameter, e.g., with the "aml_nfw.force"
520 kernel command line option.
522 source "drivers/sn/Kconfig"
525 bool "kexec system call (EXPERIMENTAL)"
526 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
528 kexec is a system call that implements the ability to shutdown your
529 current kernel, and to start another kernel. It is like a reboot
530 but it is independent of the system firmware. And like a reboot
531 you can start any kernel with it, not just Linux.
533 The name comes from the similarity to the exec system call.
535 It is an ongoing process to be certain the hardware in a machine
536 is properly shutdown, so do not be surprised if this code does not
537 initially work for you. It may help to enable device hotplugging
538 support. As of this writing the exact hardware interface is
539 strongly in flux, so no good recommendation can be made.
542 bool "kernel crash dumps"
543 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
545 Generate crash dump after being started by kexec.
547 source "drivers/firmware/Kconfig"
549 source "fs/Kconfig.binfmt"
553 menu "Power management and ACPI"
555 source "kernel/power/Kconfig"
557 source "drivers/acpi/Kconfig"
561 source "arch/ia64/kernel/cpufreq/Kconfig"
569 menu "Bus options (PCI, PCMCIA)"
574 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
575 here unless you are using a simulator without PCI support.
583 source "drivers/pci/pcie/Kconfig"
585 source "drivers/pci/Kconfig"
587 source "drivers/pci/hotplug/Kconfig"
589 source "drivers/pcmcia/Kconfig"
592 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
593 depends on IA64_GENERIC && ACPI && EXPERIMENTAL
595 DMA remapping (DMAR) devices support enables independent address
596 translations for Direct Memory Access (DMA) from devices.
597 These DMA remapping devices are reported via ACPI tables
598 and include PCI device scope covered by these DMA
607 source "drivers/Kconfig"
610 tristate "Memory special operations driver"
612 select IA64_UNCACHED_ALLOCATOR
614 If you have an ia64 and you want to enable memory special
615 operations support (formerly known as fetchop), say Y here,
620 source "arch/ia64/kvm/Kconfig"
625 # Use the generic interrupt handling code in kernel/irq/:
627 config GENERIC_HARDIRQS
631 config GENERIC_IRQ_PROBE
635 config GENERIC_PENDING_IRQ
637 depends on GENERIC_HARDIRQS && SMP
645 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
647 source "arch/ia64/hp/sim/Kconfig"
649 source "arch/ia64/Kconfig.debug"
651 source "security/Kconfig"
653 source "crypto/Kconfig"