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
53 config GENERIC_LOCKBREAK
56 depends on SMP && PREEMPT
58 config RWSEM_XCHGADD_ALGORITHM
62 config ARCH_HAS_ILOG2_U32
66 config ARCH_HAS_ILOG2_U64
70 config HUGETLB_PAGE_SIZE_VARIABLE
72 depends on HUGETLB_PAGE
75 config GENERIC_FIND_NEXT_BIT
79 config GENERIC_CALIBRATE_DELAY
87 config GENERIC_TIME_VSYSCALL
91 config HAVE_SETUP_PER_CPU_AREA
106 config SCHED_NO_NO_OMIT_FRAME_POINTER
110 config IA64_UNCACHED_ALLOCATOR
112 select GENERIC_ALLOCATOR
128 This selects the system type of your hardware. A "generic" kernel
129 will run on any supported IA-64 system. However, if you configure
130 a kernel for your specific system, it will be faster and smaller.
132 generic For any supported IA-64 system
133 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
134 HP-zx1/sx1000 For HP systems
135 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
136 SGI-SN2 For SGI Altix systems
137 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
139 If you don't know what to do, choose "generic".
148 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
149 support for the HP I/O MMU.
151 config IA64_HP_ZX1_SWIOTLB
152 bool "HP-zx1/sx1000 with software I/O TLB"
155 Build a kernel that runs on HP zx1 and sx1000 systems even when they
156 have broken PCI devices which cannot DMA to full 32 bits. Apart
157 from support for the HP I/O MMU, this includes support for the software
158 I/O TLB, which allows supporting the broken devices at the expense of
159 wasting some kernel memory (about 2MB by default).
166 Selecting this option will optimize the kernel for use on sn2 based
167 systems, but the resulting kernel binary will not run on other
168 types of ia64 systems. If you have an SGI Altix system, it's safe
169 to select this option. If in doubt, select ia64 generic support
179 prompt "Processor type"
185 Select your IA-64 processor type. The default is Itanium.
186 This choice is safe for all IA-64 systems, but may not perform
187 optimally on systems with, say, Itanium 2 or newer processors.
192 Select this to configure for an Itanium 2 (McKinley) processor.
197 prompt "Kernel page size"
198 default IA64_PAGE_SIZE_16KB
200 config IA64_PAGE_SIZE_4KB
203 This lets you select the page size of the kernel. For best IA-64
204 performance, a page size of 8KB or 16KB is recommended. For best
205 IA-32 compatibility, a page size of 4KB should be selected (the vast
206 majority of IA-32 binaries work perfectly fine with a larger page
207 size). For Itanium 2 or newer systems, a page size of 64KB can also
210 4KB For best IA-32 compatibility
211 8KB For best IA-64 performance
212 16KB For best IA-64 performance
213 64KB Requires Itanium 2 or newer processor.
215 If you don't know what to do, choose 16KB.
217 config IA64_PAGE_SIZE_8KB
220 config IA64_PAGE_SIZE_16KB
223 config IA64_PAGE_SIZE_64KB
230 prompt "Page Table Levels"
237 depends on !IA64_PAGE_SIZE_64KB
248 source kernel/Kconfig.hz
256 # align cache-sensitive data to 128 bytes
257 config IA64_L1_CACHE_SHIFT
259 default "7" if MCKINLEY
260 default "6" if ITANIUM
263 bool "Cyclone (EXA) Time Source support"
265 Say Y here to enable support for IBM EXA Cyclone time source.
266 If you're unsure, answer N.
270 depends on !IA64_HP_SIM
273 config FORCE_MAX_ZONEORDER
274 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
275 range 11 17 if !HUGETLB_PAGE
276 default "17" if HUGETLB_PAGE
279 config VIRT_CPU_ACCOUNTING
280 bool "Deterministic task and CPU time accounting"
283 Select this option to enable more accurate task and CPU time
284 accounting. This is done by reading a CPU counter on each
285 kernel entry and exit and on transitions within the kernel
286 between system, softirq and hardirq state, so there is a
287 small performance impact.
288 If in doubt, say N here.
291 bool "Symmetric multi-processing support"
293 This enables support for systems with more than one CPU. If you have
294 a system with only one CPU, say N. If you have a system with more
297 If you say N here, the kernel will run on single and multiprocessor
298 systems, but will use only one CPU of a multiprocessor system. If
299 you say Y here, the kernel will run on many, but not all,
300 single processor systems. On a single processor system, the kernel
301 will run faster if you say N here.
303 See also the SMP-HOWTO available at
304 <http://www.tldp.org/docs.html#howto>.
306 If you don't know what to do here, say N.
309 int "Maximum number of CPUs (2-1024)"
314 You should set this to the number of CPUs in your system, but
315 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
316 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
317 than 64 will cause the use of a CPU mask array, causing a small
321 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
322 depends on SMP && EXPERIMENTAL
326 Say Y here to experiment with turning CPUs off and on. CPUs
327 can be controlled through /sys/devices/system/cpu/cpu#.
328 Say N if you want to disable CPU hotplug.
330 config ARCH_ENABLE_MEMORY_HOTPLUG
333 config ARCH_ENABLE_MEMORY_HOTREMOVE
337 bool "SMT scheduler support"
340 Improves the CPU scheduler's decision making when dealing with
341 Intel IA64 chips with MultiThreading at a cost of slightly increased
342 overhead in some places. If unsure say N here.
344 config PERMIT_BSP_REMOVE
345 bool "Support removal of Bootstrap Processor"
346 depends on HOTPLUG_CPU
349 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
352 config FORCE_CPEI_RETARGET
353 bool "Force assumption that CPEI can be re-targetted"
354 depends on PERMIT_BSP_REMOVE
357 Say Y if you need to force the assumption that CPEI can be re-targetted to
358 any cpu in the system. This hint is available via ACPI 3.0 specifications.
359 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
360 This option it useful to enable this feature on older BIOS's as well.
361 You can also enable this by using boot command line option force_cpei=1.
363 source "kernel/Kconfig.preempt"
367 config ARCH_SELECT_MEMORY_MODEL
370 config ARCH_DISCONTIGMEM_ENABLE
373 Say Y to support efficient handling of discontiguous physical memory,
374 for architectures which are either NUMA (Non-Uniform Memory Access)
375 or have huge holes in the physical address space for other reasons.
376 See <file:Documentation/vm/numa> for more.
378 config ARCH_FLATMEM_ENABLE
381 config ARCH_SPARSEMEM_ENABLE
383 depends on ARCH_DISCONTIGMEM_ENABLE
384 select SPARSEMEM_VMEMMAP_ENABLE
386 config ARCH_DISCONTIGMEM_DEFAULT
387 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
388 depends on ARCH_DISCONTIGMEM_ENABLE
392 depends on !IA64_HP_SIM && !FLATMEM
393 default y if IA64_SGI_SN2
394 select ACPI_NUMA if ACPI
396 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
397 Access). This option is for configuring high-end multiprocessor
398 server systems. If in doubt, say N.
401 int "Max num nodes shift(3-10)"
404 depends on NEED_MULTIPLE_NODES
406 This option specifies the maximum number of nodes in your SSI system.
407 MAX_NUMNODES will be 2^(This value).
408 If in doubt, use the default.
410 config ARCH_POPULATES_NODE_MAP
413 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
414 # VIRTUAL_MEM_MAP has been retained for historical reasons.
415 config VIRTUAL_MEM_MAP
416 bool "Virtual mem map"
417 depends on !SPARSEMEM
418 default y if !IA64_HP_SIM
420 Say Y to compile the kernel with support for a virtual mem map.
421 This code also only takes effect if a memory hole of greater than
422 1 Gb is found during boot. You must turn this option on if you
423 require the DISCONTIGMEM option for your machine. If you are
428 default y if VIRTUAL_MEM_MAP
430 config HAVE_ARCH_EARLY_PFN_TO_NID
432 depends on NEED_MULTIPLE_NODES
434 config HAVE_ARCH_NODEDATA_EXTENSION
439 bool "Support for Linux/x86 binaries"
441 IA-64 processors can execute IA-32 (X86) instructions. By
442 saying Y here, the kernel will include IA-32 system call
443 emulation support which makes it possible to transparently
444 run IA-32 Linux binaries on an IA-64 Linux system.
449 depends on IA32_SUPPORT
452 config COMPAT_FOR_U64_ALIGNMENT
455 config IA64_MCA_RECOVERY
456 tristate "MCA recovery from errors other than TLB."
459 bool "Performance monitor support"
461 Selects whether support for the IA-64 performance monitor hardware
462 is included in the kernel. This makes some kernel data-structures a
463 little bigger and slows down execution a bit, but it is generally
464 a good idea to turn this on. If you're unsure, say Y.
467 tristate "/proc/pal support"
469 If you say Y here, you are able to get PAL (Processor Abstraction
470 Layer) information in /proc/pal. This contains useful information
471 about the processors in your systems, such as cache and TLB sizes
472 and the PAL firmware version in use.
474 To use this option, you have to ensure that the "/proc file system
475 support" (CONFIG_PROC_FS) is enabled, too.
477 config IA64_MC_ERR_INJECT
478 tristate "MC error injection support"
480 Adds support for MC error injection. If enabled, the kernel
481 will provide a sysfs interface for user applications to
482 call MC error injection PAL procedures to inject various errors.
483 This is a useful tool for MCA testing.
485 If you're unsure, do not select this option.
488 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
491 bool "ESI (Extensible SAL Interface) support"
493 If you say Y here, support is built into the kernel to
494 make ESI calls. ESI calls are used to support vendor-specific
495 firmware extensions, such as the ability to inject memory-errors
496 for test-purposes. If you're unsure, say N.
498 config IA64_HP_AML_NFW
499 bool "Support ACPI AML calls to native firmware"
501 This driver installs a global ACPI Operation Region handler for
502 region 0xA1. AML methods can use this OpRegion to call arbitrary
503 native firmware functions. The driver installs the OpRegion
504 handler if there is an HPQ5001 device or if the user supplies
505 the "force" module parameter, e.g., with the "aml_nfw.force"
506 kernel command line option.
508 source "drivers/sn/Kconfig"
511 bool "kexec system call (EXPERIMENTAL)"
512 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
514 kexec is a system call that implements the ability to shutdown your
515 current kernel, and to start another kernel. It is like a reboot
516 but it is independent of the system firmware. And like a reboot
517 you can start any kernel with it, not just Linux.
519 The name comes from the similarity to the exec system call.
521 It is an ongoing process to be certain the hardware in a machine
522 is properly shutdown, so do not be surprised if this code does not
523 initially work for you. It may help to enable device hotplugging
524 support. As of this writing the exact hardware interface is
525 strongly in flux, so no good recommendation can be made.
528 bool "kernel crash dumps (EXPERIMENTAL)"
529 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
531 Generate crash dump after being started by kexec.
533 source "drivers/firmware/Kconfig"
535 source "fs/Kconfig.binfmt"
539 menu "Power management and ACPI"
541 source "kernel/power/Kconfig"
543 source "drivers/acpi/Kconfig"
547 source "arch/ia64/kernel/cpufreq/Kconfig"
555 menu "Bus options (PCI, PCMCIA)"
560 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
561 here unless you are using a simulator without PCI support.
569 source "drivers/pci/pcie/Kconfig"
571 source "drivers/pci/Kconfig"
573 source "drivers/pci/hotplug/Kconfig"
575 source "drivers/pcmcia/Kconfig"
583 source "drivers/Kconfig"
586 tristate "Memory special operations driver"
588 select IA64_UNCACHED_ALLOCATOR
590 If you have an ia64 and you want to enable memory special
591 operations support (formerly known as fetchop), say Y here,
596 source "arch/ia64/kvm/Kconfig"
601 # Use the generic interrupt handling code in kernel/irq/:
603 config GENERIC_HARDIRQS
607 config GENERIC_IRQ_PROBE
611 config GENERIC_PENDING_IRQ
613 depends on GENERIC_HARDIRQS && SMP
621 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
623 source "arch/ia64/hp/sim/Kconfig"
625 source "arch/ia64/Kconfig.debug"
627 source "security/Kconfig"
629 source "crypto/Kconfig"