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 ARCH_HAS_ILOG2_U32
67 config ARCH_HAS_ILOG2_U64
71 config HUGETLB_PAGE_SIZE_VARIABLE
73 depends on HUGETLB_PAGE
76 config GENERIC_FIND_NEXT_BIT
80 config GENERIC_CALIBRATE_DELAY
88 config GENERIC_TIME_VSYSCALL
92 config HAVE_SETUP_PER_CPU_AREA
107 config SCHED_NO_NO_OMIT_FRAME_POINTER
111 config IA64_UNCACHED_ALLOCATOR
113 select GENERIC_ALLOCATOR
129 This selects the system type of your hardware. A "generic" kernel
130 will run on any supported IA-64 system. However, if you configure
131 a kernel for your specific system, it will be faster and smaller.
133 generic For any supported IA-64 system
134 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
135 HP-zx1/sx1000 For HP systems
136 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
137 SGI-SN2 For SGI Altix systems
138 SGI-UV For SGI UV systems
139 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
141 If you don't know what to do, choose "generic".
150 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
151 support for the HP I/O MMU.
153 config IA64_HP_ZX1_SWIOTLB
154 bool "HP-zx1/sx1000 with software I/O TLB"
157 Build a kernel that runs on HP zx1 and sx1000 systems even when they
158 have broken PCI devices which cannot DMA to full 32 bits. Apart
159 from support for the HP I/O MMU, this includes support for the software
160 I/O TLB, which allows supporting the broken devices at the expense of
161 wasting some kernel memory (about 2MB by default).
168 Selecting this option will optimize the kernel for use on sn2 based
169 systems, but the resulting kernel binary will not run on other
170 types of ia64 systems. If you have an SGI Altix system, it's safe
171 to select this option. If in doubt, select ia64 generic support
180 Selecting this option will optimize the kernel for use on UV based
181 systems, but the resulting kernel binary will not run on other
182 types of ia64 systems. If you have an SGI UV system, it's safe
183 to select this option. If in doubt, select ia64 generic support
193 prompt "Processor type"
199 Select your IA-64 processor type. The default is Itanium.
200 This choice is safe for all IA-64 systems, but may not perform
201 optimally on systems with, say, Itanium 2 or newer processors.
206 Select this to configure for an Itanium 2 (McKinley) processor.
211 prompt "Kernel page size"
212 default IA64_PAGE_SIZE_16KB
214 config IA64_PAGE_SIZE_4KB
217 This lets you select the page size of the kernel. For best IA-64
218 performance, a page size of 8KB or 16KB is recommended. For best
219 IA-32 compatibility, a page size of 4KB should be selected (the vast
220 majority of IA-32 binaries work perfectly fine with a larger page
221 size). For Itanium 2 or newer systems, a page size of 64KB can also
224 4KB For best IA-32 compatibility
225 8KB For best IA-64 performance
226 16KB For best IA-64 performance
227 64KB Requires Itanium 2 or newer processor.
229 If you don't know what to do, choose 16KB.
231 config IA64_PAGE_SIZE_8KB
234 config IA64_PAGE_SIZE_16KB
237 config IA64_PAGE_SIZE_64KB
244 prompt "Page Table Levels"
251 depends on !IA64_PAGE_SIZE_64KB
262 source kernel/Kconfig.hz
270 # align cache-sensitive data to 128 bytes
271 config IA64_L1_CACHE_SHIFT
273 default "7" if MCKINLEY
274 default "6" if ITANIUM
277 bool "Cyclone (EXA) Time Source support"
279 Say Y here to enable support for IBM EXA Cyclone time source.
280 If you're unsure, answer N.
284 depends on !IA64_HP_SIM
287 config FORCE_MAX_ZONEORDER
288 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
289 range 11 17 if !HUGETLB_PAGE
290 default "17" if HUGETLB_PAGE
293 config VIRT_CPU_ACCOUNTING
294 bool "Deterministic task and CPU time accounting"
297 Select this option to enable more accurate task and CPU time
298 accounting. This is done by reading a CPU counter on each
299 kernel entry and exit and on transitions within the kernel
300 between system, softirq and hardirq state, so there is a
301 small performance impact.
302 If in doubt, say N here.
305 bool "Symmetric multi-processing support"
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 (2-1024)"
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 (EXPERIMENTAL)"
543 depends on EXPERIMENTAL && 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"
597 source "drivers/Kconfig"
600 tristate "Memory special operations driver"
602 select IA64_UNCACHED_ALLOCATOR
604 If you have an ia64 and you want to enable memory special
605 operations support (formerly known as fetchop), say Y here,
610 source "arch/ia64/kvm/Kconfig"
615 # Use the generic interrupt handling code in kernel/irq/:
617 config GENERIC_HARDIRQS
621 config GENERIC_IRQ_PROBE
625 config GENERIC_PENDING_IRQ
627 depends on GENERIC_HARDIRQS && SMP
635 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
637 source "arch/ia64/hp/sim/Kconfig"
639 source "arch/ia64/Kconfig.debug"
641 source "security/Kconfig"
643 source "crypto/Kconfig"