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
23 The Itanium Processor Family is Intel's 64-bit successor to
24 the 32-bit X86 line. The IA-64 Linux project has a home
25 page at <http://www.linuxia64.org/> and a mailing list at
26 <linux-ia64@vger.kernel.org>.
30 select ATA_NONSTANDARD if ATA
35 depends on !IA64_SGI_SN2
48 config GENERIC_LOCKBREAK
51 depends on SMP && PREEMPT
53 config RWSEM_XCHGADD_ALGORITHM
57 config ARCH_HAS_ILOG2_U32
61 config ARCH_HAS_ILOG2_U64
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 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).
159 Selecting this option will optimize the kernel for use on sn2 based
160 systems, but the resulting kernel binary will not run on other
161 types of ia64 systems. If you have an SGI Altix system, it's safe
162 to select this option. If in doubt, select ia64 generic support
172 prompt "Processor type"
178 Select your IA-64 processor type. The default is Itanium.
179 This choice is safe for all IA-64 systems, but may not perform
180 optimally on systems with, say, Itanium 2 or newer processors.
185 Select this to configure for an Itanium 2 (McKinley) processor.
190 prompt "Kernel page size"
191 default IA64_PAGE_SIZE_16KB
193 config IA64_PAGE_SIZE_4KB
196 This lets you select the page size of the kernel. For best IA-64
197 performance, a page size of 8KB or 16KB is recommended. For best
198 IA-32 compatibility, a page size of 4KB should be selected (the vast
199 majority of IA-32 binaries work perfectly fine with a larger page
200 size). For Itanium 2 or newer systems, a page size of 64KB can also
203 4KB For best IA-32 compatibility
204 8KB For best IA-64 performance
205 16KB For best IA-64 performance
206 64KB Requires Itanium 2 or newer processor.
208 If you don't know what to do, choose 16KB.
210 config IA64_PAGE_SIZE_8KB
213 config IA64_PAGE_SIZE_16KB
216 config IA64_PAGE_SIZE_64KB
223 prompt "Page Table Levels"
230 depends on !IA64_PAGE_SIZE_64KB
241 source kernel/Kconfig.hz
249 # align cache-sensitive data to 128 bytes
250 config IA64_L1_CACHE_SHIFT
252 default "7" if MCKINLEY
253 default "6" if ITANIUM
256 bool "Cyclone (EXA) Time Source support"
258 Say Y here to enable support for IBM EXA Cyclone time source.
259 If you're unsure, answer N.
263 depends on !IA64_HP_SIM
266 config IA64_SGI_SN_XP
267 tristate "Support communication between SGI SSIs"
268 depends on IA64_GENERIC || IA64_SGI_SN2
269 select IA64_UNCACHED_ALLOCATOR
271 An SGI machine can be divided into multiple Single System
272 Images which act independently of each other and have
273 hardware based memory protection from the others. Enabling
274 this feature will allow for direct communication between SSIs
275 based on a network adapter and DMA messaging.
277 config FORCE_MAX_ZONEORDER
278 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
279 range 11 17 if !HUGETLB_PAGE
280 default "17" if HUGETLB_PAGE
283 config VIRT_CPU_ACCOUNTING
284 bool "Deterministic task and CPU time accounting"
287 Select this option to enable more accurate task and CPU time
288 accounting. This is done by reading a CPU counter on each
289 kernel entry and exit and on transitions within the kernel
290 between system, softirq and hardirq state, so there is a
291 small performance impact.
292 If in doubt, say N here.
295 bool "Symmetric multi-processing support"
297 This enables support for systems with more than one CPU. If you have
298 a system with only one CPU, say N. If you have a system with more
301 If you say N here, the kernel will run on single and multiprocessor
302 systems, but will use only one CPU of a multiprocessor system. If
303 you say Y here, the kernel will run on many, but not all,
304 single processor systems. On a single processor system, the kernel
305 will run faster if you say N here.
307 See also the SMP-HOWTO available at
308 <http://www.tldp.org/docs.html#howto>.
310 If you don't know what to do here, say N.
313 int "Maximum number of CPUs (2-1024)"
318 You should set this to the number of CPUs in your system, but
319 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
320 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
321 than 64 will cause the use of a CPU mask array, causing a small
325 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
326 depends on SMP && EXPERIMENTAL
330 Say Y here to experiment with turning CPUs off and on. CPUs
331 can be controlled through /sys/devices/system/cpu/cpu#.
332 Say N if you want to disable CPU hotplug.
334 config ARCH_ENABLE_MEMORY_HOTPLUG
337 config ARCH_ENABLE_MEMORY_HOTREMOVE
341 bool "SMT scheduler support"
344 Improves the CPU scheduler's decision making when dealing with
345 Intel IA64 chips with MultiThreading at a cost of slightly increased
346 overhead in some places. If unsure say N here.
348 config PERMIT_BSP_REMOVE
349 bool "Support removal of Bootstrap Processor"
350 depends on HOTPLUG_CPU
353 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
356 config FORCE_CPEI_RETARGET
357 bool "Force assumption that CPEI can be re-targetted"
358 depends on PERMIT_BSP_REMOVE
361 Say Y if you need to force the assumption that CPEI can be re-targetted to
362 any cpu in the system. This hint is available via ACPI 3.0 specifications.
363 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
364 This option it useful to enable this feature on older BIOS's as well.
365 You can also enable this by using boot command line option force_cpei=1.
367 source "kernel/Kconfig.preempt"
371 config ARCH_SELECT_MEMORY_MODEL
374 config ARCH_DISCONTIGMEM_ENABLE
377 Say Y to support efficient handling of discontiguous physical memory,
378 for architectures which are either NUMA (Non-Uniform Memory Access)
379 or have huge holes in the physical address space for other reasons.
380 See <file:Documentation/vm/numa> for more.
382 config ARCH_FLATMEM_ENABLE
385 config ARCH_SPARSEMEM_ENABLE
387 depends on ARCH_DISCONTIGMEM_ENABLE
388 select SPARSEMEM_VMEMMAP_ENABLE
390 config ARCH_DISCONTIGMEM_DEFAULT
391 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
392 depends on ARCH_DISCONTIGMEM_ENABLE
396 depends on !IA64_HP_SIM && !FLATMEM
397 default y if IA64_SGI_SN2
398 select ACPI_NUMA if ACPI
400 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
401 Access). This option is for configuring high-end multiprocessor
402 server systems. If in doubt, say N.
405 int "Max num nodes shift(3-10)"
408 depends on NEED_MULTIPLE_NODES
410 This option specifies the maximum number of nodes in your SSI system.
411 MAX_NUMNODES will be 2^(This value).
412 If in doubt, use the default.
414 config ARCH_POPULATES_NODE_MAP
417 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
418 # VIRTUAL_MEM_MAP has been retained for historical reasons.
419 config VIRTUAL_MEM_MAP
420 bool "Virtual mem map"
421 depends on !SPARSEMEM
422 default y if !IA64_HP_SIM
424 Say Y to compile the kernel with support for a virtual mem map.
425 This code also only takes effect if a memory hole of greater than
426 1 Gb is found during boot. You must turn this option on if you
427 require the DISCONTIGMEM option for your machine. If you are
432 default y if VIRTUAL_MEM_MAP
434 config HAVE_ARCH_EARLY_PFN_TO_NID
436 depends on NEED_MULTIPLE_NODES
438 config HAVE_ARCH_NODEDATA_EXTENSION
443 bool "Support for Linux/x86 binaries"
445 IA-64 processors can execute IA-32 (X86) instructions. By
446 saying Y here, the kernel will include IA-32 system call
447 emulation support which makes it possible to transparently
448 run IA-32 Linux binaries on an IA-64 Linux system.
453 depends on IA32_SUPPORT
456 config COMPAT_FOR_U64_ALIGNMENT
459 config IA64_MCA_RECOVERY
460 tristate "MCA recovery from errors other than TLB."
463 bool "Performance monitor support"
465 Selects whether support for the IA-64 performance monitor hardware
466 is included in the kernel. This makes some kernel data-structures a
467 little bigger and slows down execution a bit, but it is generally
468 a good idea to turn this on. If you're unsure, say Y.
471 tristate "/proc/pal support"
473 If you say Y here, you are able to get PAL (Processor Abstraction
474 Layer) information in /proc/pal. This contains useful information
475 about the processors in your systems, such as cache and TLB sizes
476 and the PAL firmware version in use.
478 To use this option, you have to ensure that the "/proc file system
479 support" (CONFIG_PROC_FS) is enabled, too.
481 config IA64_MC_ERR_INJECT
482 tristate "MC error injection support"
484 Adds support for MC error injection. If enabled, the kernel
485 will provide a sysfs interface for user applications to
486 call MC error injection PAL procedures to inject various errors.
487 This is a useful tool for MCA testing.
489 If you're unsure, do not select this option.
492 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
495 bool "ESI (Extensible SAL Interface) support"
497 If you say Y here, support is built into the kernel to
498 make ESI calls. ESI calls are used to support vendor-specific
499 firmware extensions, such as the ability to inject memory-errors
500 for test-purposes. If you're unsure, say N.
502 config IA64_HP_AML_NFW
503 bool "Support ACPI AML calls to native firmware"
505 This driver installs a global ACPI Operation Region handler for
506 region 0xA1. AML methods can use this OpRegion to call arbitrary
507 native firmware functions. The driver installs the OpRegion
508 handler if there is an HPQ5001 device or if the user supplies
509 the "force" module parameter, e.g., with the "aml_nfw.force"
510 kernel command line option.
512 source "drivers/sn/Kconfig"
515 bool "kexec system call (EXPERIMENTAL)"
516 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
518 kexec is a system call that implements the ability to shutdown your
519 current kernel, and to start another kernel. It is like a reboot
520 but it is independent of the system firmware. And like a reboot
521 you can start any kernel with it, not just Linux.
523 The name comes from the similarity to the exec system call.
525 It is an ongoing process to be certain the hardware in a machine
526 is properly shutdown, so do not be surprised if this code does not
527 initially work for you. It may help to enable device hotplugging
528 support. As of this writing the exact hardware interface is
529 strongly in flux, so no good recommendation can be made.
532 bool "kernel crash dumps (EXPERIMENTAL)"
533 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
535 Generate crash dump after being started by kexec.
537 source "drivers/firmware/Kconfig"
539 source "fs/Kconfig.binfmt"
543 menu "Power management and ACPI"
545 source "kernel/power/Kconfig"
547 source "drivers/acpi/Kconfig"
551 source "arch/ia64/kernel/cpufreq/Kconfig"
559 menu "Bus options (PCI, PCMCIA)"
564 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
565 here unless you are using a simulator without PCI support.
573 source "drivers/pci/pcie/Kconfig"
575 source "drivers/pci/Kconfig"
577 source "drivers/pci/hotplug/Kconfig"
579 source "drivers/pcmcia/Kconfig"
587 source "drivers/Kconfig"
590 tristate "Memory special operations driver"
592 select IA64_UNCACHED_ALLOCATOR
594 If you have an ia64 and you want to enable memory special
595 operations support (formerly known as fetchop), say Y here,
603 # Use the generic interrupt handling code in kernel/irq/:
605 config GENERIC_HARDIRQS
609 config GENERIC_IRQ_PROBE
613 config GENERIC_PENDING_IRQ
615 depends on GENERIC_HARDIRQS && SMP
622 source "arch/ia64/hp/sim/Kconfig"
624 source "arch/ia64/Kconfig.debug"
626 source "security/Kconfig"
628 source "crypto/Kconfig"