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 SGI-UV For SGI UV systems
139 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
141 If you don't know what to do, choose "generic".
150 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
151 support for the HP I/O MMU.
153 config IA64_HP_ZX1_SWIOTLB
154 bool "HP-zx1/sx1000 with software I/O TLB"
157 Build a kernel that runs on HP zx1 and sx1000 systems even when they
158 have broken PCI devices which cannot DMA to full 32 bits. Apart
159 from support for the HP I/O MMU, this includes support for the software
160 I/O TLB, which allows supporting the broken devices at the expense of
161 wasting some kernel memory (about 2MB by default).
168 Selecting this option will optimize the kernel for use on sn2 based
169 systems, but the resulting kernel binary will not run on other
170 types of ia64 systems. If you have an SGI Altix system, it's safe
171 to select this option. If in doubt, select ia64 generic support
180 Selecting this option will optimize the kernel for use on UV based
181 systems, but the resulting kernel binary will not run on other
182 types of ia64 systems. If you have an SGI UV system, it's safe
183 to select this option. If in doubt, select ia64 generic support
193 prompt "Processor type"
199 Select your IA-64 processor type. The default is Itanium.
200 This choice is safe for all IA-64 systems, but may not perform
201 optimally on systems with, say, Itanium 2 or newer processors.
206 Select this to configure for an Itanium 2 (McKinley) processor.
211 prompt "Kernel page size"
212 default IA64_PAGE_SIZE_16KB
214 config IA64_PAGE_SIZE_4KB
217 This lets you select the page size of the kernel. For best IA-64
218 performance, a page size of 8KB or 16KB is recommended. For best
219 IA-32 compatibility, a page size of 4KB should be selected (the vast
220 majority of IA-32 binaries work perfectly fine with a larger page
221 size). For Itanium 2 or newer systems, a page size of 64KB can also
224 4KB For best IA-32 compatibility
225 8KB For best IA-64 performance
226 16KB For best IA-64 performance
227 64KB Requires Itanium 2 or newer processor.
229 If you don't know what to do, choose 16KB.
231 config IA64_PAGE_SIZE_8KB
234 config IA64_PAGE_SIZE_16KB
237 config IA64_PAGE_SIZE_64KB
244 prompt "Page Table Levels"
251 depends on !IA64_PAGE_SIZE_64KB
262 source kernel/Kconfig.hz
270 # align cache-sensitive data to 128 bytes
271 config IA64_L1_CACHE_SHIFT
273 default "7" if MCKINLEY
274 default "6" if ITANIUM
277 bool "Cyclone (EXA) Time Source support"
279 Say Y here to enable support for IBM EXA Cyclone time source.
280 If you're unsure, answer N.
284 depends on !IA64_HP_SIM
287 config FORCE_MAX_ZONEORDER
288 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
289 range 11 17 if !HUGETLB_PAGE
290 default "17" if HUGETLB_PAGE
293 config VIRT_CPU_ACCOUNTING
294 bool "Deterministic task and CPU time accounting"
297 Select this option to enable more accurate task and CPU time
298 accounting. This is done by reading a CPU counter on each
299 kernel entry and exit and on transitions within the kernel
300 between system, softirq and hardirq state, so there is a
301 small performance impact.
302 If in doubt, say N here.
305 bool "Symmetric multi-processing support"
306 select USE_GENERIC_SMP_HELPERS
308 This enables support for systems with more than one CPU. If you have
309 a system with only one CPU, say N. If you have a system with more
312 If you say N here, the kernel will run on single and multiprocessor
313 systems, but will use only one CPU of a multiprocessor system. If
314 you say Y here, the kernel will run on many, but not all,
315 single processor systems. On a single processor system, the kernel
316 will run faster if you say N here.
318 See also the SMP-HOWTO available at
319 <http://www.tldp.org/docs.html#howto>.
321 If you don't know what to do here, say N.
324 int "Maximum number of CPUs (2-4096)"
329 You should set this to the number of CPUs in your system, but
330 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
331 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
332 than 64 will cause the use of a CPU mask array, causing a small
336 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
337 depends on SMP && EXPERIMENTAL
341 Say Y here to experiment with turning CPUs off and on. CPUs
342 can be controlled through /sys/devices/system/cpu/cpu#.
343 Say N if you want to disable CPU hotplug.
345 config ARCH_ENABLE_MEMORY_HOTPLUG
348 config ARCH_ENABLE_MEMORY_HOTREMOVE
352 bool "SMT scheduler support"
355 Improves the CPU scheduler's decision making when dealing with
356 Intel IA64 chips with MultiThreading at a cost of slightly increased
357 overhead in some places. If unsure say N here.
359 config PERMIT_BSP_REMOVE
360 bool "Support removal of Bootstrap Processor"
361 depends on HOTPLUG_CPU
364 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
367 config FORCE_CPEI_RETARGET
368 bool "Force assumption that CPEI can be re-targetted"
369 depends on PERMIT_BSP_REMOVE
372 Say Y if you need to force the assumption that CPEI can be re-targetted to
373 any cpu in the system. This hint is available via ACPI 3.0 specifications.
374 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
375 This option it useful to enable this feature on older BIOS's as well.
376 You can also enable this by using boot command line option force_cpei=1.
378 source "kernel/Kconfig.preempt"
382 config ARCH_SELECT_MEMORY_MODEL
385 config ARCH_DISCONTIGMEM_ENABLE
388 Say Y to support efficient handling of discontiguous physical memory,
389 for architectures which are either NUMA (Non-Uniform Memory Access)
390 or have huge holes in the physical address space for other reasons.
391 See <file:Documentation/vm/numa> for more.
393 config ARCH_FLATMEM_ENABLE
396 config ARCH_SPARSEMEM_ENABLE
398 depends on ARCH_DISCONTIGMEM_ENABLE
399 select SPARSEMEM_VMEMMAP_ENABLE
401 config ARCH_DISCONTIGMEM_DEFAULT
402 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
403 depends on ARCH_DISCONTIGMEM_ENABLE
407 depends on !IA64_HP_SIM && !FLATMEM
408 default y if IA64_SGI_SN2
409 select ACPI_NUMA if ACPI
411 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
412 Access). This option is for configuring high-end multiprocessor
413 server systems. If in doubt, say N.
416 int "Max num nodes shift(3-10)"
419 depends on NEED_MULTIPLE_NODES
421 This option specifies the maximum number of nodes in your SSI system.
422 MAX_NUMNODES will be 2^(This value).
423 If in doubt, use the default.
425 config ARCH_POPULATES_NODE_MAP
428 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
429 # VIRTUAL_MEM_MAP has been retained for historical reasons.
430 config VIRTUAL_MEM_MAP
431 bool "Virtual mem map"
432 depends on !SPARSEMEM
433 default y if !IA64_HP_SIM
435 Say Y to compile the kernel with support for a virtual mem map.
436 This code also only takes effect if a memory hole of greater than
437 1 Gb is found during boot. You must turn this option on if you
438 require the DISCONTIGMEM option for your machine. If you are
443 default y if VIRTUAL_MEM_MAP
445 config HAVE_ARCH_EARLY_PFN_TO_NID
447 depends on NEED_MULTIPLE_NODES
449 config HAVE_ARCH_NODEDATA_EXTENSION
454 bool "Support for Linux/x86 binaries"
456 IA-64 processors can execute IA-32 (X86) instructions. By
457 saying Y here, the kernel will include IA-32 system call
458 emulation support which makes it possible to transparently
459 run IA-32 Linux binaries on an IA-64 Linux system.
464 depends on IA32_SUPPORT
467 config COMPAT_FOR_U64_ALIGNMENT
470 config IA64_MCA_RECOVERY
471 tristate "MCA recovery from errors other than TLB."
474 bool "Performance monitor support"
476 Selects whether support for the IA-64 performance monitor hardware
477 is included in the kernel. This makes some kernel data-structures a
478 little bigger and slows down execution a bit, but it is generally
479 a good idea to turn this on. If you're unsure, say Y.
482 tristate "/proc/pal support"
484 If you say Y here, you are able to get PAL (Processor Abstraction
485 Layer) information in /proc/pal. This contains useful information
486 about the processors in your systems, such as cache and TLB sizes
487 and the PAL firmware version in use.
489 To use this option, you have to ensure that the "/proc file system
490 support" (CONFIG_PROC_FS) is enabled, too.
492 config IA64_MC_ERR_INJECT
493 tristate "MC error injection support"
495 Adds support for MC error injection. If enabled, the kernel
496 will provide a sysfs interface for user applications to
497 call MC error injection PAL procedures to inject various errors.
498 This is a useful tool for MCA testing.
500 If you're unsure, do not select this option.
503 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
506 bool "ESI (Extensible SAL Interface) support"
508 If you say Y here, support is built into the kernel to
509 make ESI calls. ESI calls are used to support vendor-specific
510 firmware extensions, such as the ability to inject memory-errors
511 for test-purposes. If you're unsure, say N.
513 config IA64_HP_AML_NFW
514 bool "Support ACPI AML calls to native firmware"
516 This driver installs a global ACPI Operation Region handler for
517 region 0xA1. AML methods can use this OpRegion to call arbitrary
518 native firmware functions. The driver installs the OpRegion
519 handler if there is an HPQ5001 device or if the user supplies
520 the "force" module parameter, e.g., with the "aml_nfw.force"
521 kernel command line option.
523 source "drivers/sn/Kconfig"
526 bool "kexec system call (EXPERIMENTAL)"
527 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
529 kexec is a system call that implements the ability to shutdown your
530 current kernel, and to start another kernel. It is like a reboot
531 but it is independent of the system firmware. And like a reboot
532 you can start any kernel with it, not just Linux.
534 The name comes from the similarity to the exec system call.
536 It is an ongoing process to be certain the hardware in a machine
537 is properly shutdown, so do not be surprised if this code does not
538 initially work for you. It may help to enable device hotplugging
539 support. As of this writing the exact hardware interface is
540 strongly in flux, so no good recommendation can be made.
543 bool "kernel crash dumps"
544 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
546 Generate crash dump after being started by kexec.
548 source "drivers/firmware/Kconfig"
550 source "fs/Kconfig.binfmt"
554 menu "Power management and ACPI"
556 source "kernel/power/Kconfig"
558 source "drivers/acpi/Kconfig"
562 source "arch/ia64/kernel/cpufreq/Kconfig"
570 menu "Bus options (PCI, PCMCIA)"
575 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
576 here unless you are using a simulator without PCI support.
584 source "drivers/pci/pcie/Kconfig"
586 source "drivers/pci/Kconfig"
588 source "drivers/pci/hotplug/Kconfig"
590 source "drivers/pcmcia/Kconfig"
598 source "drivers/Kconfig"
601 tristate "Memory special operations driver"
603 select IA64_UNCACHED_ALLOCATOR
605 If you have an ia64 and you want to enable memory special
606 operations support (formerly known as fetchop), say Y here,
611 source "arch/ia64/kvm/Kconfig"
616 # Use the generic interrupt handling code in kernel/irq/:
618 config GENERIC_HARDIRQS
622 config GENERIC_IRQ_PROBE
626 config GENERIC_PENDING_IRQ
628 depends on GENERIC_HARDIRQS && SMP
636 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
638 source "arch/ia64/hp/sim/Kconfig"
640 source "arch/ia64/Kconfig.debug"
642 source "security/Kconfig"
644 source "crypto/Kconfig"