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 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
140 If you don't know what to do, choose "generic".
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
180 prompt "Processor type"
186 Select your IA-64 processor type. The default is Itanium.
187 This choice is safe for all IA-64 systems, but may not perform
188 optimally on systems with, say, Itanium 2 or newer processors.
193 Select this to configure for an Itanium 2 (McKinley) processor.
198 prompt "Kernel page size"
199 default IA64_PAGE_SIZE_16KB
201 config IA64_PAGE_SIZE_4KB
204 This lets you select the page size of the kernel. For best IA-64
205 performance, a page size of 8KB or 16KB is recommended. For best
206 IA-32 compatibility, a page size of 4KB should be selected (the vast
207 majority of IA-32 binaries work perfectly fine with a larger page
208 size). For Itanium 2 or newer systems, a page size of 64KB can also
211 4KB For best IA-32 compatibility
212 8KB For best IA-64 performance
213 16KB For best IA-64 performance
214 64KB Requires Itanium 2 or newer processor.
216 If you don't know what to do, choose 16KB.
218 config IA64_PAGE_SIZE_8KB
221 config IA64_PAGE_SIZE_16KB
224 config IA64_PAGE_SIZE_64KB
231 prompt "Page Table Levels"
238 depends on !IA64_PAGE_SIZE_64KB
249 source kernel/Kconfig.hz
257 # align cache-sensitive data to 128 bytes
258 config IA64_L1_CACHE_SHIFT
260 default "7" if MCKINLEY
261 default "6" if ITANIUM
264 bool "Cyclone (EXA) Time Source support"
266 Say Y here to enable support for IBM EXA Cyclone time source.
267 If you're unsure, answer N.
271 depends on !IA64_HP_SIM
274 config FORCE_MAX_ZONEORDER
275 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
276 range 11 17 if !HUGETLB_PAGE
277 default "17" if HUGETLB_PAGE
280 config VIRT_CPU_ACCOUNTING
281 bool "Deterministic task and CPU time accounting"
284 Select this option to enable more accurate task and CPU time
285 accounting. This is done by reading a CPU counter on each
286 kernel entry and exit and on transitions within the kernel
287 between system, softirq and hardirq state, so there is a
288 small performance impact.
289 If in doubt, say N here.
292 bool "Symmetric multi-processing support"
294 This enables support for systems with more than one CPU. If you have
295 a system with only one CPU, say N. If you have a system with more
298 If you say N here, the kernel will run on single and multiprocessor
299 systems, but will use only one CPU of a multiprocessor system. If
300 you say Y here, the kernel will run on many, but not all,
301 single processor systems. On a single processor system, the kernel
302 will run faster if you say N here.
304 See also the SMP-HOWTO available at
305 <http://www.tldp.org/docs.html#howto>.
307 If you don't know what to do here, say N.
310 int "Maximum number of CPUs (2-1024)"
315 You should set this to the number of CPUs in your system, but
316 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
317 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
318 than 64 will cause the use of a CPU mask array, causing a small
322 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
323 depends on SMP && EXPERIMENTAL
327 Say Y here to experiment with turning CPUs off and on. CPUs
328 can be controlled through /sys/devices/system/cpu/cpu#.
329 Say N if you want to disable CPU hotplug.
331 config ARCH_ENABLE_MEMORY_HOTPLUG
334 config ARCH_ENABLE_MEMORY_HOTREMOVE
338 bool "SMT scheduler support"
341 Improves the CPU scheduler's decision making when dealing with
342 Intel IA64 chips with MultiThreading at a cost of slightly increased
343 overhead in some places. If unsure say N here.
345 config PERMIT_BSP_REMOVE
346 bool "Support removal of Bootstrap Processor"
347 depends on HOTPLUG_CPU
350 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
353 config FORCE_CPEI_RETARGET
354 bool "Force assumption that CPEI can be re-targetted"
355 depends on PERMIT_BSP_REMOVE
358 Say Y if you need to force the assumption that CPEI can be re-targetted to
359 any cpu in the system. This hint is available via ACPI 3.0 specifications.
360 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
361 This option it useful to enable this feature on older BIOS's as well.
362 You can also enable this by using boot command line option force_cpei=1.
364 source "kernel/Kconfig.preempt"
368 config ARCH_SELECT_MEMORY_MODEL
371 config ARCH_DISCONTIGMEM_ENABLE
374 Say Y to support efficient handling of discontiguous physical memory,
375 for architectures which are either NUMA (Non-Uniform Memory Access)
376 or have huge holes in the physical address space for other reasons.
377 See <file:Documentation/vm/numa> for more.
379 config ARCH_FLATMEM_ENABLE
382 config ARCH_SPARSEMEM_ENABLE
384 depends on ARCH_DISCONTIGMEM_ENABLE
385 select SPARSEMEM_VMEMMAP_ENABLE
387 config ARCH_DISCONTIGMEM_DEFAULT
388 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
389 depends on ARCH_DISCONTIGMEM_ENABLE
393 depends on !IA64_HP_SIM && !FLATMEM
394 default y if IA64_SGI_SN2
395 select ACPI_NUMA if ACPI
397 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
398 Access). This option is for configuring high-end multiprocessor
399 server systems. If in doubt, say N.
402 int "Max num nodes shift(3-10)"
405 depends on NEED_MULTIPLE_NODES
407 This option specifies the maximum number of nodes in your SSI system.
408 MAX_NUMNODES will be 2^(This value).
409 If in doubt, use the default.
411 config ARCH_POPULATES_NODE_MAP
414 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
415 # VIRTUAL_MEM_MAP has been retained for historical reasons.
416 config VIRTUAL_MEM_MAP
417 bool "Virtual mem map"
418 depends on !SPARSEMEM
419 default y if !IA64_HP_SIM
421 Say Y to compile the kernel with support for a virtual mem map.
422 This code also only takes effect if a memory hole of greater than
423 1 Gb is found during boot. You must turn this option on if you
424 require the DISCONTIGMEM option for your machine. If you are
429 default y if VIRTUAL_MEM_MAP
431 config HAVE_ARCH_EARLY_PFN_TO_NID
433 depends on NEED_MULTIPLE_NODES
435 config HAVE_ARCH_NODEDATA_EXTENSION
440 bool "Support for Linux/x86 binaries"
442 IA-64 processors can execute IA-32 (X86) instructions. By
443 saying Y here, the kernel will include IA-32 system call
444 emulation support which makes it possible to transparently
445 run IA-32 Linux binaries on an IA-64 Linux system.
450 depends on IA32_SUPPORT
453 config COMPAT_FOR_U64_ALIGNMENT
456 config IA64_MCA_RECOVERY
457 tristate "MCA recovery from errors other than TLB."
460 bool "Performance monitor support"
462 Selects whether support for the IA-64 performance monitor hardware
463 is included in the kernel. This makes some kernel data-structures a
464 little bigger and slows down execution a bit, but it is generally
465 a good idea to turn this on. If you're unsure, say Y.
468 tristate "/proc/pal support"
470 If you say Y here, you are able to get PAL (Processor Abstraction
471 Layer) information in /proc/pal. This contains useful information
472 about the processors in your systems, such as cache and TLB sizes
473 and the PAL firmware version in use.
475 To use this option, you have to ensure that the "/proc file system
476 support" (CONFIG_PROC_FS) is enabled, too.
478 config IA64_MC_ERR_INJECT
479 tristate "MC error injection support"
481 Adds support for MC error injection. If enabled, the kernel
482 will provide a sysfs interface for user applications to
483 call MC error injection PAL procedures to inject various errors.
484 This is a useful tool for MCA testing.
486 If you're unsure, do not select this option.
489 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
492 bool "ESI (Extensible SAL Interface) support"
494 If you say Y here, support is built into the kernel to
495 make ESI calls. ESI calls are used to support vendor-specific
496 firmware extensions, such as the ability to inject memory-errors
497 for test-purposes. If you're unsure, say N.
499 config IA64_HP_AML_NFW
500 bool "Support ACPI AML calls to native firmware"
502 This driver installs a global ACPI Operation Region handler for
503 region 0xA1. AML methods can use this OpRegion to call arbitrary
504 native firmware functions. The driver installs the OpRegion
505 handler if there is an HPQ5001 device or if the user supplies
506 the "force" module parameter, e.g., with the "aml_nfw.force"
507 kernel command line option.
509 source "drivers/sn/Kconfig"
512 bool "kexec system call (EXPERIMENTAL)"
513 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
515 kexec is a system call that implements the ability to shutdown your
516 current kernel, and to start another kernel. It is like a reboot
517 but it is independent of the system firmware. And like a reboot
518 you can start any kernel with it, not just Linux.
520 The name comes from the similarity to the exec system call.
522 It is an ongoing process to be certain the hardware in a machine
523 is properly shutdown, so do not be surprised if this code does not
524 initially work for you. It may help to enable device hotplugging
525 support. As of this writing the exact hardware interface is
526 strongly in flux, so no good recommendation can be made.
529 bool "kernel crash dumps (EXPERIMENTAL)"
530 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
532 Generate crash dump after being started by kexec.
534 source "drivers/firmware/Kconfig"
536 source "fs/Kconfig.binfmt"
540 menu "Power management and ACPI"
542 source "kernel/power/Kconfig"
544 source "drivers/acpi/Kconfig"
548 source "arch/ia64/kernel/cpufreq/Kconfig"
556 menu "Bus options (PCI, PCMCIA)"
561 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
562 here unless you are using a simulator without PCI support.
570 source "drivers/pci/pcie/Kconfig"
572 source "drivers/pci/Kconfig"
574 source "drivers/pci/hotplug/Kconfig"
576 source "drivers/pcmcia/Kconfig"
584 source "drivers/Kconfig"
587 tristate "Memory special operations driver"
589 select IA64_UNCACHED_ALLOCATOR
591 If you have an ia64 and you want to enable memory special
592 operations support (formerly known as fetchop), say Y here,
597 source "arch/ia64/kvm/Kconfig"
602 # Use the generic interrupt handling code in kernel/irq/:
604 config GENERIC_HARDIRQS
608 config GENERIC_IRQ_PROBE
612 config GENERIC_PENDING_IRQ
614 depends on GENERIC_HARDIRQS && SMP
622 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
624 source "arch/ia64/hp/sim/Kconfig"
626 source "arch/ia64/Kconfig.debug"
628 source "security/Kconfig"
630 source "crypto/Kconfig"