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
24 select HAVE_ARCH_TRACEHOOK
27 The Itanium Processor Family is Intel's 64-bit successor to
28 the 32-bit X86 line. The IA-64 Linux project has a home
29 page at <http://www.linuxia64.org/> and a mailing list at
30 <linux-ia64@vger.kernel.org>.
34 select ATA_NONSTANDARD if ATA
39 depends on !IA64_SGI_SN2
55 config GENERIC_LOCKBREAK
58 depends on SMP && PREEMPT
60 config RWSEM_XCHGADD_ALGORITHM
64 config HUGETLB_PAGE_SIZE_VARIABLE
66 depends on HUGETLB_PAGE
69 config GENERIC_FIND_NEXT_BIT
73 config GENERIC_CALIBRATE_DELAY
81 config GENERIC_TIME_VSYSCALL
85 config HAVE_SETUP_PER_CPU_AREA
100 config SCHED_NO_NO_OMIT_FRAME_POINTER
104 config IA64_UNCACHED_ALLOCATOR
106 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 HP-zx1/sx1000 For HP systems
129 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
130 SGI-SN2 For SGI Altix systems
131 SGI-UV For SGI UV systems
132 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
134 If you don't know what to do, choose "generic".
143 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
144 support for the HP I/O MMU.
146 config IA64_HP_ZX1_SWIOTLB
147 bool "HP-zx1/sx1000 with software I/O TLB"
150 Build a kernel that runs on HP zx1 and sx1000 systems even when they
151 have broken PCI devices which cannot DMA to full 32 bits. Apart
152 from support for the HP I/O MMU, this includes support for the software
153 I/O TLB, which allows supporting the broken devices at the expense of
154 wasting some kernel memory (about 2MB by default).
161 Selecting this option will optimize the kernel for use on sn2 based
162 systems, but the resulting kernel binary will not run on other
163 types of ia64 systems. If you have an SGI Altix system, it's safe
164 to select this option. If in doubt, select ia64 generic support
173 Selecting this option will optimize the kernel for use on UV based
174 systems, but the resulting kernel binary will not run on other
175 types of ia64 systems. If you have an SGI UV system, it's safe
176 to select this option. If in doubt, select ia64 generic support
186 prompt "Processor type"
192 Select your IA-64 processor type. The default is Itanium.
193 This choice is safe for all IA-64 systems, but may not perform
194 optimally on systems with, say, Itanium 2 or newer processors.
199 Select this to configure for an Itanium 2 (McKinley) processor.
204 prompt "Kernel page size"
205 default IA64_PAGE_SIZE_16KB
207 config IA64_PAGE_SIZE_4KB
210 This lets you select the page size of the kernel. For best IA-64
211 performance, a page size of 8KB or 16KB is recommended. For best
212 IA-32 compatibility, a page size of 4KB should be selected (the vast
213 majority of IA-32 binaries work perfectly fine with a larger page
214 size). For Itanium 2 or newer systems, a page size of 64KB can also
217 4KB For best IA-32 compatibility
218 8KB For best IA-64 performance
219 16KB For best IA-64 performance
220 64KB Requires Itanium 2 or newer processor.
222 If you don't know what to do, choose 16KB.
224 config IA64_PAGE_SIZE_8KB
227 config IA64_PAGE_SIZE_16KB
230 config IA64_PAGE_SIZE_64KB
237 prompt "Page Table Levels"
244 depends on !IA64_PAGE_SIZE_64KB
255 source kernel/Kconfig.hz
263 # align cache-sensitive data to 128 bytes
264 config IA64_L1_CACHE_SHIFT
266 default "7" if MCKINLEY
267 default "6" if ITANIUM
270 bool "Cyclone (EXA) Time Source support"
272 Say Y here to enable support for IBM EXA Cyclone time source.
273 If you're unsure, answer N.
277 depends on !IA64_HP_SIM
280 config FORCE_MAX_ZONEORDER
281 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
282 range 11 17 if !HUGETLB_PAGE
283 default "17" if HUGETLB_PAGE
286 config VIRT_CPU_ACCOUNTING
287 bool "Deterministic task and CPU time accounting"
290 Select this option to enable more accurate task and CPU time
291 accounting. This is done by reading a CPU counter on each
292 kernel entry and exit and on transitions within the kernel
293 between system, softirq and hardirq state, so there is a
294 small performance impact.
295 If in doubt, say N here.
298 bool "Symmetric multi-processing support"
299 select USE_GENERIC_SMP_HELPERS
301 This enables support for systems with more than one CPU. If you have
302 a system with only one CPU, say N. If you have a system with more
305 If you say N here, the kernel will run on single and multiprocessor
306 systems, but will use only one CPU of a multiprocessor system. If
307 you say Y here, the kernel will run on many, but not all,
308 single processor systems. On a single processor system, the kernel
309 will run faster if you say N here.
311 See also the SMP-HOWTO available at
312 <http://www.tldp.org/docs.html#howto>.
314 If you don't know what to do here, say N.
317 int "Maximum number of CPUs (2-4096)"
322 You should set this to the number of CPUs in your system, but
323 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
324 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
325 than 64 will cause the use of a CPU mask array, causing a small
329 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
330 depends on SMP && EXPERIMENTAL
334 Say Y here to experiment with turning CPUs off and on. CPUs
335 can be controlled through /sys/devices/system/cpu/cpu#.
336 Say N if you want to disable CPU hotplug.
338 config ARCH_ENABLE_MEMORY_HOTPLUG
341 config ARCH_ENABLE_MEMORY_HOTREMOVE
345 bool "SMT scheduler support"
348 Improves the CPU scheduler's decision making when dealing with
349 Intel IA64 chips with MultiThreading at a cost of slightly increased
350 overhead in some places. If unsure say N here.
352 config PERMIT_BSP_REMOVE
353 bool "Support removal of Bootstrap Processor"
354 depends on HOTPLUG_CPU
357 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
360 config FORCE_CPEI_RETARGET
361 bool "Force assumption that CPEI can be re-targetted"
362 depends on PERMIT_BSP_REMOVE
365 Say Y if you need to force the assumption that CPEI can be re-targetted to
366 any cpu in the system. This hint is available via ACPI 3.0 specifications.
367 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
368 This option it useful to enable this feature on older BIOS's as well.
369 You can also enable this by using boot command line option force_cpei=1.
371 source "kernel/Kconfig.preempt"
375 config ARCH_SELECT_MEMORY_MODEL
378 config ARCH_DISCONTIGMEM_ENABLE
381 Say Y to support efficient handling of discontiguous physical memory,
382 for architectures which are either NUMA (Non-Uniform Memory Access)
383 or have huge holes in the physical address space for other reasons.
384 See <file:Documentation/vm/numa> for more.
386 config ARCH_FLATMEM_ENABLE
389 config ARCH_SPARSEMEM_ENABLE
391 depends on ARCH_DISCONTIGMEM_ENABLE
392 select SPARSEMEM_VMEMMAP_ENABLE
394 config ARCH_DISCONTIGMEM_DEFAULT
395 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
396 depends on ARCH_DISCONTIGMEM_ENABLE
400 depends on !IA64_HP_SIM && !FLATMEM
401 default y if IA64_SGI_SN2
402 select ACPI_NUMA if ACPI
404 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
405 Access). This option is for configuring high-end multiprocessor
406 server systems. If in doubt, say N.
409 int "Max num nodes shift(3-10)"
412 depends on NEED_MULTIPLE_NODES
414 This option specifies the maximum number of nodes in your SSI system.
415 MAX_NUMNODES will be 2^(This value).
416 If in doubt, use the default.
418 config ARCH_POPULATES_NODE_MAP
421 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
422 # VIRTUAL_MEM_MAP has been retained for historical reasons.
423 config VIRTUAL_MEM_MAP
424 bool "Virtual mem map"
425 depends on !SPARSEMEM
426 default y if !IA64_HP_SIM
428 Say Y to compile the kernel with support for a virtual mem map.
429 This code also only takes effect if a memory hole of greater than
430 1 Gb is found during boot. You must turn this option on if you
431 require the DISCONTIGMEM option for your machine. If you are
436 default y if VIRTUAL_MEM_MAP
438 config HAVE_ARCH_EARLY_PFN_TO_NID
440 depends on NEED_MULTIPLE_NODES
442 config HAVE_ARCH_NODEDATA_EXTENSION
447 bool "Support for Linux/x86 binaries"
449 IA-64 processors can execute IA-32 (X86) instructions. By
450 saying Y here, the kernel will include IA-32 system call
451 emulation support which makes it possible to transparently
452 run IA-32 Linux binaries on an IA-64 Linux system.
457 depends on IA32_SUPPORT
460 config COMPAT_FOR_U64_ALIGNMENT
463 config IA64_MCA_RECOVERY
464 tristate "MCA recovery from errors other than TLB."
467 bool "Performance monitor support"
469 Selects whether support for the IA-64 performance monitor hardware
470 is included in the kernel. This makes some kernel data-structures a
471 little bigger and slows down execution a bit, but it is generally
472 a good idea to turn this on. If you're unsure, say Y.
475 tristate "/proc/pal support"
477 If you say Y here, you are able to get PAL (Processor Abstraction
478 Layer) information in /proc/pal. This contains useful information
479 about the processors in your systems, such as cache and TLB sizes
480 and the PAL firmware version in use.
482 To use this option, you have to ensure that the "/proc file system
483 support" (CONFIG_PROC_FS) is enabled, too.
485 config IA64_MC_ERR_INJECT
486 tristate "MC error injection support"
488 Adds support for MC error injection. If enabled, the kernel
489 will provide a sysfs interface for user applications to
490 call MC error injection PAL procedures to inject various errors.
491 This is a useful tool for MCA testing.
493 If you're unsure, do not select this option.
496 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
499 bool "ESI (Extensible SAL Interface) support"
501 If you say Y here, support is built into the kernel to
502 make ESI calls. ESI calls are used to support vendor-specific
503 firmware extensions, such as the ability to inject memory-errors
504 for test-purposes. If you're unsure, say N.
506 config IA64_HP_AML_NFW
507 bool "Support ACPI AML calls to native firmware"
509 This driver installs a global ACPI Operation Region handler for
510 region 0xA1. AML methods can use this OpRegion to call arbitrary
511 native firmware functions. The driver installs the OpRegion
512 handler if there is an HPQ5001 device or if the user supplies
513 the "force" module parameter, e.g., with the "aml_nfw.force"
514 kernel command line option.
516 source "drivers/sn/Kconfig"
519 bool "kexec system call (EXPERIMENTAL)"
520 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
522 kexec is a system call that implements the ability to shutdown your
523 current kernel, and to start another kernel. It is like a reboot
524 but it is independent of the system firmware. And like a reboot
525 you can start any kernel with it, not just Linux.
527 The name comes from the similarity to the exec system call.
529 It is an ongoing process to be certain the hardware in a machine
530 is properly shutdown, so do not be surprised if this code does not
531 initially work for you. It may help to enable device hotplugging
532 support. As of this writing the exact hardware interface is
533 strongly in flux, so no good recommendation can be made.
536 bool "kernel crash dumps"
537 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
539 Generate crash dump after being started by kexec.
541 source "drivers/firmware/Kconfig"
543 source "fs/Kconfig.binfmt"
547 menu "Power management and ACPI"
549 source "kernel/power/Kconfig"
551 source "drivers/acpi/Kconfig"
555 source "arch/ia64/kernel/cpufreq/Kconfig"
563 menu "Bus options (PCI, PCMCIA)"
568 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
569 here unless you are using a simulator without PCI support.
577 source "drivers/pci/pcie/Kconfig"
579 source "drivers/pci/Kconfig"
581 source "drivers/pci/hotplug/Kconfig"
583 source "drivers/pcmcia/Kconfig"
591 source "drivers/Kconfig"
594 tristate "Memory special operations driver"
596 select IA64_UNCACHED_ALLOCATOR
598 If you have an ia64 and you want to enable memory special
599 operations support (formerly known as fetchop), say Y here,
604 source "arch/ia64/kvm/Kconfig"
609 # Use the generic interrupt handling code in kernel/irq/:
611 config GENERIC_HARDIRQS
615 config GENERIC_IRQ_PROBE
619 config GENERIC_PENDING_IRQ
621 depends on GENERIC_HARDIRQS && SMP
629 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
631 source "arch/ia64/hp/sim/Kconfig"
633 source "arch/ia64/Kconfig.debug"
635 source "security/Kconfig"
637 source "crypto/Kconfig"