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
25 The Itanium Processor Family is Intel's 64-bit successor to
26 the 32-bit X86 line. The IA-64 Linux project has a home
27 page at <http://www.linuxia64.org/> and a mailing list at
28 <linux-ia64@vger.kernel.org>.
32 select ATA_NONSTANDARD if ATA
37 depends on !IA64_SGI_SN2
50 config GENERIC_LOCKBREAK
53 depends on SMP && PREEMPT
55 config RWSEM_XCHGADD_ALGORITHM
59 config ARCH_HAS_ILOG2_U32
63 config ARCH_HAS_ILOG2_U64
67 config HUGETLB_PAGE_SIZE_VARIABLE
69 depends on HUGETLB_PAGE
72 config GENERIC_FIND_NEXT_BIT
76 config GENERIC_CALIBRATE_DELAY
84 config GENERIC_TIME_VSYSCALL
88 config HAVE_SETUP_PER_CPU_AREA
103 config SCHED_NO_NO_OMIT_FRAME_POINTER
107 config IA64_UNCACHED_ALLOCATOR
109 select GENERIC_ALLOCATOR
125 This selects the system type of your hardware. A "generic" kernel
126 will run on any supported IA-64 system. However, if you configure
127 a kernel for your specific system, it will be faster and smaller.
129 generic For any supported IA-64 system
130 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
131 HP-zx1/sx1000 For HP systems
132 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
133 SGI-SN2 For SGI Altix systems
134 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
136 If you don't know what to do, choose "generic".
145 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
146 support for the HP I/O MMU.
148 config IA64_HP_ZX1_SWIOTLB
149 bool "HP-zx1/sx1000 with software I/O TLB"
152 Build a kernel that runs on HP zx1 and sx1000 systems even when they
153 have broken PCI devices which cannot DMA to full 32 bits. Apart
154 from support for the HP I/O MMU, this includes support for the software
155 I/O TLB, which allows supporting the broken devices at the expense of
156 wasting some kernel memory (about 2MB by default).
163 Selecting this option will optimize the kernel for use on sn2 based
164 systems, but the resulting kernel binary will not run on other
165 types of ia64 systems. If you have an SGI Altix system, it's safe
166 to select this option. If in doubt, select ia64 generic support
176 prompt "Processor type"
182 Select your IA-64 processor type. The default is Itanium.
183 This choice is safe for all IA-64 systems, but may not perform
184 optimally on systems with, say, Itanium 2 or newer processors.
189 Select this to configure for an Itanium 2 (McKinley) processor.
194 prompt "Kernel page size"
195 default IA64_PAGE_SIZE_16KB
197 config IA64_PAGE_SIZE_4KB
200 This lets you select the page size of the kernel. For best IA-64
201 performance, a page size of 8KB or 16KB is recommended. For best
202 IA-32 compatibility, a page size of 4KB should be selected (the vast
203 majority of IA-32 binaries work perfectly fine with a larger page
204 size). For Itanium 2 or newer systems, a page size of 64KB can also
207 4KB For best IA-32 compatibility
208 8KB For best IA-64 performance
209 16KB For best IA-64 performance
210 64KB Requires Itanium 2 or newer processor.
212 If you don't know what to do, choose 16KB.
214 config IA64_PAGE_SIZE_8KB
217 config IA64_PAGE_SIZE_16KB
220 config IA64_PAGE_SIZE_64KB
227 prompt "Page Table Levels"
234 depends on !IA64_PAGE_SIZE_64KB
245 source kernel/Kconfig.hz
253 # align cache-sensitive data to 128 bytes
254 config IA64_L1_CACHE_SHIFT
256 default "7" if MCKINLEY
257 default "6" if ITANIUM
260 bool "Cyclone (EXA) Time Source support"
262 Say Y here to enable support for IBM EXA Cyclone time source.
263 If you're unsure, answer N.
267 depends on !IA64_HP_SIM
270 config FORCE_MAX_ZONEORDER
271 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
272 range 11 17 if !HUGETLB_PAGE
273 default "17" if HUGETLB_PAGE
276 config VIRT_CPU_ACCOUNTING
277 bool "Deterministic task and CPU time accounting"
280 Select this option to enable more accurate task and CPU time
281 accounting. This is done by reading a CPU counter on each
282 kernel entry and exit and on transitions within the kernel
283 between system, softirq and hardirq state, so there is a
284 small performance impact.
285 If in doubt, say N here.
288 bool "Symmetric multi-processing support"
290 This enables support for systems with more than one CPU. If you have
291 a system with only one CPU, say N. If you have a system with more
294 If you say N here, the kernel will run on single and multiprocessor
295 systems, but will use only one CPU of a multiprocessor system. If
296 you say Y here, the kernel will run on many, but not all,
297 single processor systems. On a single processor system, the kernel
298 will run faster if you say N here.
300 See also the SMP-HOWTO available at
301 <http://www.tldp.org/docs.html#howto>.
303 If you don't know what to do here, say N.
306 int "Maximum number of CPUs (2-1024)"
311 You should set this to the number of CPUs in your system, but
312 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
313 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
314 than 64 will cause the use of a CPU mask array, causing a small
318 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
319 depends on SMP && EXPERIMENTAL
323 Say Y here to experiment with turning CPUs off and on. CPUs
324 can be controlled through /sys/devices/system/cpu/cpu#.
325 Say N if you want to disable CPU hotplug.
327 config ARCH_ENABLE_MEMORY_HOTPLUG
330 config ARCH_ENABLE_MEMORY_HOTREMOVE
334 bool "SMT scheduler support"
337 Improves the CPU scheduler's decision making when dealing with
338 Intel IA64 chips with MultiThreading at a cost of slightly increased
339 overhead in some places. If unsure say N here.
341 config PERMIT_BSP_REMOVE
342 bool "Support removal of Bootstrap Processor"
343 depends on HOTPLUG_CPU
346 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
349 config FORCE_CPEI_RETARGET
350 bool "Force assumption that CPEI can be re-targetted"
351 depends on PERMIT_BSP_REMOVE
354 Say Y if you need to force the assumption that CPEI can be re-targetted to
355 any cpu in the system. This hint is available via ACPI 3.0 specifications.
356 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
357 This option it useful to enable this feature on older BIOS's as well.
358 You can also enable this by using boot command line option force_cpei=1.
360 source "kernel/Kconfig.preempt"
364 config ARCH_SELECT_MEMORY_MODEL
367 config ARCH_DISCONTIGMEM_ENABLE
370 Say Y to support efficient handling of discontiguous physical memory,
371 for architectures which are either NUMA (Non-Uniform Memory Access)
372 or have huge holes in the physical address space for other reasons.
373 See <file:Documentation/vm/numa> for more.
375 config ARCH_FLATMEM_ENABLE
378 config ARCH_SPARSEMEM_ENABLE
380 depends on ARCH_DISCONTIGMEM_ENABLE
381 select SPARSEMEM_VMEMMAP_ENABLE
383 config ARCH_DISCONTIGMEM_DEFAULT
384 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
385 depends on ARCH_DISCONTIGMEM_ENABLE
389 depends on !IA64_HP_SIM && !FLATMEM
390 default y if IA64_SGI_SN2
391 select ACPI_NUMA if ACPI
393 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
394 Access). This option is for configuring high-end multiprocessor
395 server systems. If in doubt, say N.
398 int "Max num nodes shift(3-10)"
401 depends on NEED_MULTIPLE_NODES
403 This option specifies the maximum number of nodes in your SSI system.
404 MAX_NUMNODES will be 2^(This value).
405 If in doubt, use the default.
407 config ARCH_POPULATES_NODE_MAP
410 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
411 # VIRTUAL_MEM_MAP has been retained for historical reasons.
412 config VIRTUAL_MEM_MAP
413 bool "Virtual mem map"
414 depends on !SPARSEMEM
415 default y if !IA64_HP_SIM
417 Say Y to compile the kernel with support for a virtual mem map.
418 This code also only takes effect if a memory hole of greater than
419 1 Gb is found during boot. You must turn this option on if you
420 require the DISCONTIGMEM option for your machine. If you are
425 default y if VIRTUAL_MEM_MAP
427 config HAVE_ARCH_EARLY_PFN_TO_NID
429 depends on NEED_MULTIPLE_NODES
431 config HAVE_ARCH_NODEDATA_EXTENSION
436 bool "Support for Linux/x86 binaries"
438 IA-64 processors can execute IA-32 (X86) instructions. By
439 saying Y here, the kernel will include IA-32 system call
440 emulation support which makes it possible to transparently
441 run IA-32 Linux binaries on an IA-64 Linux system.
446 depends on IA32_SUPPORT
449 config COMPAT_FOR_U64_ALIGNMENT
452 config IA64_MCA_RECOVERY
453 tristate "MCA recovery from errors other than TLB."
456 bool "Performance monitor support"
458 Selects whether support for the IA-64 performance monitor hardware
459 is included in the kernel. This makes some kernel data-structures a
460 little bigger and slows down execution a bit, but it is generally
461 a good idea to turn this on. If you're unsure, say Y.
464 tristate "/proc/pal support"
466 If you say Y here, you are able to get PAL (Processor Abstraction
467 Layer) information in /proc/pal. This contains useful information
468 about the processors in your systems, such as cache and TLB sizes
469 and the PAL firmware version in use.
471 To use this option, you have to ensure that the "/proc file system
472 support" (CONFIG_PROC_FS) is enabled, too.
474 config IA64_MC_ERR_INJECT
475 tristate "MC error injection support"
477 Adds support for MC error injection. If enabled, the kernel
478 will provide a sysfs interface for user applications to
479 call MC error injection PAL procedures to inject various errors.
480 This is a useful tool for MCA testing.
482 If you're unsure, do not select this option.
485 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
488 bool "ESI (Extensible SAL Interface) support"
490 If you say Y here, support is built into the kernel to
491 make ESI calls. ESI calls are used to support vendor-specific
492 firmware extensions, such as the ability to inject memory-errors
493 for test-purposes. If you're unsure, say N.
495 config IA64_HP_AML_NFW
496 bool "Support ACPI AML calls to native firmware"
498 This driver installs a global ACPI Operation Region handler for
499 region 0xA1. AML methods can use this OpRegion to call arbitrary
500 native firmware functions. The driver installs the OpRegion
501 handler if there is an HPQ5001 device or if the user supplies
502 the "force" module parameter, e.g., with the "aml_nfw.force"
503 kernel command line option.
505 source "drivers/sn/Kconfig"
508 bool "kexec system call (EXPERIMENTAL)"
509 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
511 kexec is a system call that implements the ability to shutdown your
512 current kernel, and to start another kernel. It is like a reboot
513 but it is independent of the system firmware. And like a reboot
514 you can start any kernel with it, not just Linux.
516 The name comes from the similarity to the exec system call.
518 It is an ongoing process to be certain the hardware in a machine
519 is properly shutdown, so do not be surprised if this code does not
520 initially work for you. It may help to enable device hotplugging
521 support. As of this writing the exact hardware interface is
522 strongly in flux, so no good recommendation can be made.
525 bool "kernel crash dumps (EXPERIMENTAL)"
526 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
528 Generate crash dump after being started by kexec.
530 source "drivers/firmware/Kconfig"
532 source "fs/Kconfig.binfmt"
536 menu "Power management and ACPI"
538 source "kernel/power/Kconfig"
540 source "drivers/acpi/Kconfig"
544 source "arch/ia64/kernel/cpufreq/Kconfig"
552 menu "Bus options (PCI, PCMCIA)"
557 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
558 here unless you are using a simulator without PCI support.
566 source "drivers/pci/pcie/Kconfig"
568 source "drivers/pci/Kconfig"
570 source "drivers/pci/hotplug/Kconfig"
572 source "drivers/pcmcia/Kconfig"
580 source "drivers/Kconfig"
583 tristate "Memory special operations driver"
585 select IA64_UNCACHED_ALLOCATOR
587 If you have an ia64 and you want to enable memory special
588 operations support (formerly known as fetchop), say Y here,
593 source "arch/ia64/kvm/Kconfig"
598 # Use the generic interrupt handling code in kernel/irq/:
600 config GENERIC_HARDIRQS
604 config GENERIC_IRQ_PROBE
608 config GENERIC_PENDING_IRQ
610 depends on GENERIC_HARDIRQS && SMP
618 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC)
620 source "arch/ia64/hp/sim/Kconfig"
622 source "arch/ia64/Kconfig.debug"
624 source "security/Kconfig"
626 source "crypto/Kconfig"