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
23 select HAVE_KRETPROBES
28 The Itanium Processor Family is Intel's 64-bit successor to
29 the 32-bit X86 line. The IA-64 Linux project has a home
30 page at <http://www.linuxia64.org/> and a mailing list at
31 <linux-ia64@vger.kernel.org>.
35 select ATA_NONSTANDARD if ATA
40 depends on !IA64_SGI_SN2
56 config GENERIC_LOCKBREAK
59 depends on SMP && PREEMPT
61 config RWSEM_XCHGADD_ALGORITHM
65 config HUGETLB_PAGE_SIZE_VARIABLE
67 depends on HUGETLB_PAGE
70 config GENERIC_FIND_NEXT_BIT
74 config GENERIC_CALIBRATE_DELAY
82 config GENERIC_TIME_VSYSCALL
86 config HAVE_SETUP_PER_CPU_AREA
101 config SCHED_NO_NO_OMIT_FRAME_POINTER
105 config IA64_UNCACHED_ALLOCATOR
107 select GENERIC_ALLOCATOR
123 This selects the system type of your hardware. A "generic" kernel
124 will run on any supported IA-64 system. However, if you configure
125 a kernel for your specific system, it will be faster and smaller.
127 generic For any supported IA-64 system
128 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
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".
144 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
145 support for the HP I/O MMU.
147 config IA64_HP_ZX1_SWIOTLB
148 bool "HP-zx1/sx1000 with software I/O TLB"
151 Build a kernel that runs on HP zx1 and sx1000 systems even when they
152 have broken PCI devices which cannot DMA to full 32 bits. Apart
153 from support for the HP I/O MMU, this includes support for the software
154 I/O TLB, which allows supporting the broken devices at the expense of
155 wasting some kernel memory (about 2MB by default).
162 Selecting this option will optimize the kernel for use on sn2 based
163 systems, but the resulting kernel binary will not run on other
164 types of ia64 systems. If you have an SGI Altix system, it's safe
165 to select this option. If in doubt, select ia64 generic support
174 Selecting this option will optimize the kernel for use on UV based
175 systems, but the resulting kernel binary will not run on other
176 types of ia64 systems. If you have an SGI UV system, it's safe
177 to select this option. If in doubt, select ia64 generic support
187 prompt "Processor type"
193 Select your IA-64 processor type. The default is Itanium.
194 This choice is safe for all IA-64 systems, but may not perform
195 optimally on systems with, say, Itanium 2 or newer processors.
200 Select this to configure for an Itanium 2 (McKinley) processor.
205 prompt "Kernel page size"
206 default IA64_PAGE_SIZE_16KB
208 config IA64_PAGE_SIZE_4KB
211 This lets you select the page size of the kernel. For best IA-64
212 performance, a page size of 8KB or 16KB is recommended. For best
213 IA-32 compatibility, a page size of 4KB should be selected (the vast
214 majority of IA-32 binaries work perfectly fine with a larger page
215 size). For Itanium 2 or newer systems, a page size of 64KB can also
218 4KB For best IA-32 compatibility
219 8KB For best IA-64 performance
220 16KB For best IA-64 performance
221 64KB Requires Itanium 2 or newer processor.
223 If you don't know what to do, choose 16KB.
225 config IA64_PAGE_SIZE_8KB
228 config IA64_PAGE_SIZE_16KB
231 config IA64_PAGE_SIZE_64KB
238 prompt "Page Table Levels"
245 depends on !IA64_PAGE_SIZE_64KB
256 source kernel/Kconfig.hz
264 # align cache-sensitive data to 128 bytes
265 config IA64_L1_CACHE_SHIFT
267 default "7" if MCKINLEY
268 default "6" if ITANIUM
271 bool "Cyclone (EXA) Time Source support"
273 Say Y here to enable support for IBM EXA Cyclone time source.
274 If you're unsure, answer N.
278 depends on !IA64_HP_SIM
281 config FORCE_MAX_ZONEORDER
282 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
283 range 11 17 if !HUGETLB_PAGE
284 default "17" if HUGETLB_PAGE
287 config VIRT_CPU_ACCOUNTING
288 bool "Deterministic task and CPU time accounting"
291 Select this option to enable more accurate task and CPU time
292 accounting. This is done by reading a CPU counter on each
293 kernel entry and exit and on transitions within the kernel
294 between system, softirq and hardirq state, so there is a
295 small performance impact.
296 If in doubt, say N here.
299 bool "Symmetric multi-processing support"
300 select USE_GENERIC_SMP_HELPERS
302 This enables support for systems with more than one CPU. If you have
303 a system with only one CPU, say N. If you have a system with more
306 If you say N here, the kernel will run on single and multiprocessor
307 systems, but will use only one CPU of a multiprocessor system. If
308 you say Y here, the kernel will run on many, but not all,
309 single processor systems. On a single processor system, the kernel
310 will run faster if you say N here.
312 See also the SMP-HOWTO available at
313 <http://www.tldp.org/docs.html#howto>.
315 If you don't know what to do here, say N.
318 int "Maximum number of CPUs (2-4096)"
323 You should set this to the number of CPUs in your system, but
324 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
325 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
326 than 64 will cause the use of a CPU mask array, causing a small
330 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
331 depends on SMP && EXPERIMENTAL
335 Say Y here to experiment with turning CPUs off and on. CPUs
336 can be controlled through /sys/devices/system/cpu/cpu#.
337 Say N if you want to disable CPU hotplug.
339 config ARCH_ENABLE_MEMORY_HOTPLUG
342 config ARCH_ENABLE_MEMORY_HOTREMOVE
346 bool "SMT scheduler support"
349 Improves the CPU scheduler's decision making when dealing with
350 Intel IA64 chips with MultiThreading at a cost of slightly increased
351 overhead in some places. If unsure say N here.
353 config PERMIT_BSP_REMOVE
354 bool "Support removal of Bootstrap Processor"
355 depends on HOTPLUG_CPU
358 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
361 config FORCE_CPEI_RETARGET
362 bool "Force assumption that CPEI can be re-targetted"
363 depends on PERMIT_BSP_REMOVE
366 Say Y if you need to force the assumption that CPEI can be re-targetted to
367 any cpu in the system. This hint is available via ACPI 3.0 specifications.
368 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
369 This option it useful to enable this feature on older BIOS's as well.
370 You can also enable this by using boot command line option force_cpei=1.
372 source "kernel/Kconfig.preempt"
376 config ARCH_SELECT_MEMORY_MODEL
379 config ARCH_DISCONTIGMEM_ENABLE
382 Say Y to support efficient handling of discontiguous physical memory,
383 for architectures which are either NUMA (Non-Uniform Memory Access)
384 or have huge holes in the physical address space for other reasons.
385 See <file:Documentation/vm/numa> for more.
387 config ARCH_FLATMEM_ENABLE
390 config ARCH_SPARSEMEM_ENABLE
392 depends on ARCH_DISCONTIGMEM_ENABLE
393 select SPARSEMEM_VMEMMAP_ENABLE
395 config ARCH_DISCONTIGMEM_DEFAULT
396 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
397 depends on ARCH_DISCONTIGMEM_ENABLE
401 depends on !IA64_HP_SIM && !FLATMEM
402 default y if IA64_SGI_SN2
403 select ACPI_NUMA if ACPI
405 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
406 Access). This option is for configuring high-end multiprocessor
407 server systems. If in doubt, say N.
410 int "Max num nodes shift(3-10)"
413 depends on NEED_MULTIPLE_NODES
415 This option specifies the maximum number of nodes in your SSI system.
416 MAX_NUMNODES will be 2^(This value).
417 If in doubt, use the default.
419 config ARCH_POPULATES_NODE_MAP
422 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
423 # VIRTUAL_MEM_MAP has been retained for historical reasons.
424 config VIRTUAL_MEM_MAP
425 bool "Virtual mem map"
426 depends on !SPARSEMEM
427 default y if !IA64_HP_SIM
429 Say Y to compile the kernel with support for a virtual mem map.
430 This code also only takes effect if a memory hole of greater than
431 1 Gb is found during boot. You must turn this option on if you
432 require the DISCONTIGMEM option for your machine. If you are
437 default y if VIRTUAL_MEM_MAP
439 config HAVE_ARCH_EARLY_PFN_TO_NID
441 depends on NEED_MULTIPLE_NODES
443 config HAVE_ARCH_NODEDATA_EXTENSION
448 bool "Support for Linux/x86 binaries"
450 IA-64 processors can execute IA-32 (X86) instructions. By
451 saying Y here, the kernel will include IA-32 system call
452 emulation support which makes it possible to transparently
453 run IA-32 Linux binaries on an IA-64 Linux system.
458 depends on IA32_SUPPORT
461 config COMPAT_FOR_U64_ALIGNMENT
464 config IA64_MCA_RECOVERY
465 tristate "MCA recovery from errors other than TLB."
468 bool "Performance monitor support"
470 Selects whether support for the IA-64 performance monitor hardware
471 is included in the kernel. This makes some kernel data-structures a
472 little bigger and slows down execution a bit, but it is generally
473 a good idea to turn this on. If you're unsure, say Y.
476 tristate "/proc/pal support"
478 If you say Y here, you are able to get PAL (Processor Abstraction
479 Layer) information in /proc/pal. This contains useful information
480 about the processors in your systems, such as cache and TLB sizes
481 and the PAL firmware version in use.
483 To use this option, you have to ensure that the "/proc file system
484 support" (CONFIG_PROC_FS) is enabled, too.
486 config IA64_MC_ERR_INJECT
487 tristate "MC error injection support"
489 Adds support for MC error injection. If enabled, the kernel
490 will provide a sysfs interface for user applications to
491 call MC error injection PAL procedures to inject various errors.
492 This is a useful tool for MCA testing.
494 If you're unsure, do not select this option.
497 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
500 bool "ESI (Extensible SAL Interface) support"
502 If you say Y here, support is built into the kernel to
503 make ESI calls. ESI calls are used to support vendor-specific
504 firmware extensions, such as the ability to inject memory-errors
505 for test-purposes. If you're unsure, say N.
507 config IA64_HP_AML_NFW
508 bool "Support ACPI AML calls to native firmware"
510 This driver installs a global ACPI Operation Region handler for
511 region 0xA1. AML methods can use this OpRegion to call arbitrary
512 native firmware functions. The driver installs the OpRegion
513 handler if there is an HPQ5001 device or if the user supplies
514 the "force" module parameter, e.g., with the "aml_nfw.force"
515 kernel command line option.
517 source "drivers/sn/Kconfig"
520 bool "kexec system call (EXPERIMENTAL)"
521 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
523 kexec is a system call that implements the ability to shutdown your
524 current kernel, and to start another kernel. It is like a reboot
525 but it is independent of the system firmware. And like a reboot
526 you can start any kernel with it, not just Linux.
528 The name comes from the similarity to the exec system call.
530 It is an ongoing process to be certain the hardware in a machine
531 is properly shutdown, so do not be surprised if this code does not
532 initially work for you. It may help to enable device hotplugging
533 support. As of this writing the exact hardware interface is
534 strongly in flux, so no good recommendation can be made.
537 bool "kernel crash dumps"
538 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
540 Generate crash dump after being started by kexec.
542 source "drivers/firmware/Kconfig"
544 source "fs/Kconfig.binfmt"
548 menu "Power management and ACPI"
550 source "kernel/power/Kconfig"
552 source "drivers/acpi/Kconfig"
556 source "arch/ia64/kernel/cpufreq/Kconfig"
564 menu "Bus options (PCI, PCMCIA)"
569 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
570 here unless you are using a simulator without PCI support.
578 source "drivers/pci/pcie/Kconfig"
580 source "drivers/pci/Kconfig"
582 source "drivers/pci/hotplug/Kconfig"
584 source "drivers/pcmcia/Kconfig"
592 source "drivers/Kconfig"
595 tristate "Memory special operations driver"
597 select IA64_UNCACHED_ALLOCATOR
599 If you have an ia64 and you want to enable memory special
600 operations support (formerly known as fetchop), say Y here,
605 source "arch/ia64/kvm/Kconfig"
610 # Use the generic interrupt handling code in kernel/irq/:
612 config GENERIC_HARDIRQS
616 config GENERIC_IRQ_PROBE
620 config GENERIC_PENDING_IRQ
622 depends on GENERIC_HARDIRQS && SMP
630 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
632 source "arch/ia64/hp/sim/Kconfig"
634 source "arch/ia64/Kconfig.debug"
636 source "security/Kconfig"
638 source "crypto/Kconfig"