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 The Itanium Processor Family is Intel's 64-bit successor to
25 the 32-bit X86 line. The IA-64 Linux project has a home
26 page at <http://www.linuxia64.org/> and a mailing list at
27 <linux-ia64@vger.kernel.org>.
31 select ATA_NONSTANDARD if ATA
36 depends on !IA64_SGI_SN2
49 config GENERIC_LOCKBREAK
52 depends on SMP && PREEMPT
54 config RWSEM_XCHGADD_ALGORITHM
58 config ARCH_HAS_ILOG2_U32
62 config ARCH_HAS_ILOG2_U64
66 config HUGETLB_PAGE_SIZE_VARIABLE
68 depends on HUGETLB_PAGE
71 config GENERIC_FIND_NEXT_BIT
75 config GENERIC_CALIBRATE_DELAY
83 config GENERIC_TIME_VSYSCALL
87 config HAVE_SETUP_PER_CPU_AREA
102 config SCHED_NO_NO_OMIT_FRAME_POINTER
106 config IA64_UNCACHED_ALLOCATOR
108 select GENERIC_ALLOCATOR
124 This selects the system type of your hardware. A "generic" kernel
125 will run on any supported IA-64 system. However, if you configure
126 a kernel for your specific system, it will be faster and smaller.
128 generic For any supported IA-64 system
129 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
130 HP-zx1/sx1000 For HP systems
131 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
132 SGI-SN2 For SGI Altix systems
133 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
135 If you don't know what to do, choose "generic".
144 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
145 support for the HP I/O MMU.
147 config IA64_HP_ZX1_SWIOTLB
148 bool "HP-zx1/sx1000 with software I/O TLB"
151 Build a kernel that runs on HP zx1 and sx1000 systems even when they
152 have broken PCI devices which cannot DMA to full 32 bits. Apart
153 from support for the HP I/O MMU, this includes support for the software
154 I/O TLB, which allows supporting the broken devices at the expense of
155 wasting some kernel memory (about 2MB by default).
160 Selecting this option will optimize the kernel for use on sn2 based
161 systems, but the resulting kernel binary will not run on other
162 types of ia64 systems. If you have an SGI Altix system, it's safe
163 to select this option. If in doubt, select ia64 generic support
173 prompt "Processor type"
179 Select your IA-64 processor type. The default is Itanium.
180 This choice is safe for all IA-64 systems, but may not perform
181 optimally on systems with, say, Itanium 2 or newer processors.
186 Select this to configure for an Itanium 2 (McKinley) processor.
191 prompt "Kernel page size"
192 default IA64_PAGE_SIZE_16KB
194 config IA64_PAGE_SIZE_4KB
197 This lets you select the page size of the kernel. For best IA-64
198 performance, a page size of 8KB or 16KB is recommended. For best
199 IA-32 compatibility, a page size of 4KB should be selected (the vast
200 majority of IA-32 binaries work perfectly fine with a larger page
201 size). For Itanium 2 or newer systems, a page size of 64KB can also
204 4KB For best IA-32 compatibility
205 8KB For best IA-64 performance
206 16KB For best IA-64 performance
207 64KB Requires Itanium 2 or newer processor.
209 If you don't know what to do, choose 16KB.
211 config IA64_PAGE_SIZE_8KB
214 config IA64_PAGE_SIZE_16KB
217 config IA64_PAGE_SIZE_64KB
224 prompt "Page Table Levels"
231 depends on !IA64_PAGE_SIZE_64KB
242 source kernel/Kconfig.hz
250 # align cache-sensitive data to 128 bytes
251 config IA64_L1_CACHE_SHIFT
253 default "7" if MCKINLEY
254 default "6" if ITANIUM
257 bool "Cyclone (EXA) Time Source support"
259 Say Y here to enable support for IBM EXA Cyclone time source.
260 If you're unsure, answer N.
264 depends on !IA64_HP_SIM
267 config IA64_SGI_SN_XP
268 tristate "Support communication between SGI SSIs"
269 depends on IA64_GENERIC || IA64_SGI_SN2
270 select IA64_UNCACHED_ALLOCATOR
272 An SGI machine can be divided into multiple Single System
273 Images which act independently of each other and have
274 hardware based memory protection from the others. Enabling
275 this feature will allow for direct communication between SSIs
276 based on a network adapter and DMA messaging.
278 config FORCE_MAX_ZONEORDER
279 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
280 range 11 17 if !HUGETLB_PAGE
281 default "17" if HUGETLB_PAGE
285 bool "Symmetric multi-processing support"
287 This enables support for systems with more than one CPU. If you have
288 a system with only one CPU, say N. If you have a system with more
291 If you say N here, the kernel will run on single and multiprocessor
292 systems, but will use only one CPU of a multiprocessor system. If
293 you say Y here, the kernel will run on many, but not all,
294 single processor systems. On a single processor system, the kernel
295 will run faster if you say N here.
297 See also the SMP-HOWTO available at
298 <http://www.tldp.org/docs.html#howto>.
300 If you don't know what to do here, say N.
303 int "Maximum number of CPUs (2-1024)"
308 You should set this to the number of CPUs in your system, but
309 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
310 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
311 than 64 will cause the use of a CPU mask array, causing a small
315 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
316 depends on SMP && EXPERIMENTAL
320 Say Y here to experiment with turning CPUs off and on. CPUs
321 can be controlled through /sys/devices/system/cpu/cpu#.
322 Say N if you want to disable CPU hotplug.
324 config ARCH_ENABLE_MEMORY_HOTPLUG
327 config ARCH_ENABLE_MEMORY_HOTREMOVE
331 bool "SMT scheduler support"
334 Improves the CPU scheduler's decision making when dealing with
335 Intel IA64 chips with MultiThreading at a cost of slightly increased
336 overhead in some places. If unsure say N here.
338 config PERMIT_BSP_REMOVE
339 bool "Support removal of Bootstrap Processor"
340 depends on HOTPLUG_CPU
343 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
346 config FORCE_CPEI_RETARGET
347 bool "Force assumption that CPEI can be re-targetted"
348 depends on PERMIT_BSP_REMOVE
351 Say Y if you need to force the assumption that CPEI can be re-targetted to
352 any cpu in the system. This hint is available via ACPI 3.0 specifications.
353 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
354 This option it useful to enable this feature on older BIOS's as well.
355 You can also enable this by using boot command line option force_cpei=1.
357 source "kernel/Kconfig.preempt"
361 config ARCH_SELECT_MEMORY_MODEL
364 config ARCH_DISCONTIGMEM_ENABLE
367 Say Y to support efficient handling of discontiguous physical memory,
368 for architectures which are either NUMA (Non-Uniform Memory Access)
369 or have huge holes in the physical address space for other reasons.
370 See <file:Documentation/vm/numa> for more.
372 config ARCH_FLATMEM_ENABLE
375 config ARCH_SPARSEMEM_ENABLE
377 depends on ARCH_DISCONTIGMEM_ENABLE
378 select SPARSEMEM_VMEMMAP_ENABLE
380 config ARCH_DISCONTIGMEM_DEFAULT
381 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
382 depends on ARCH_DISCONTIGMEM_ENABLE
386 depends on !IA64_HP_SIM && !FLATMEM
387 default y if IA64_SGI_SN2
388 select ACPI_NUMA if ACPI
390 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
391 Access). This option is for configuring high-end multiprocessor
392 server systems. If in doubt, say N.
395 int "Max num nodes shift(3-10)"
398 depends on NEED_MULTIPLE_NODES
400 This option specifies the maximum number of nodes in your SSI system.
401 MAX_NUMNODES will be 2^(This value).
402 If in doubt, use the default.
404 config ARCH_POPULATES_NODE_MAP
407 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
408 # VIRTUAL_MEM_MAP has been retained for historical reasons.
409 config VIRTUAL_MEM_MAP
410 bool "Virtual mem map"
411 depends on !SPARSEMEM
412 default y if !IA64_HP_SIM
414 Say Y to compile the kernel with support for a virtual mem map.
415 This code also only takes effect if a memory hole of greater than
416 1 Gb is found during boot. You must turn this option on if you
417 require the DISCONTIGMEM option for your machine. If you are
422 default y if VIRTUAL_MEM_MAP
424 config HAVE_ARCH_EARLY_PFN_TO_NID
426 depends on NEED_MULTIPLE_NODES
428 config HAVE_ARCH_NODEDATA_EXTENSION
433 bool "Support for Linux/x86 binaries"
435 IA-64 processors can execute IA-32 (X86) instructions. By
436 saying Y here, the kernel will include IA-32 system call
437 emulation support which makes it possible to transparently
438 run IA-32 Linux binaries on an IA-64 Linux system.
443 depends on IA32_SUPPORT
446 config COMPAT_FOR_U64_ALIGNMENT
449 config IA64_MCA_RECOVERY
450 tristate "MCA recovery from errors other than TLB."
453 bool "Performance monitor support"
455 Selects whether support for the IA-64 performance monitor hardware
456 is included in the kernel. This makes some kernel data-structures a
457 little bigger and slows down execution a bit, but it is generally
458 a good idea to turn this on. If you're unsure, say Y.
461 tristate "/proc/pal support"
463 If you say Y here, you are able to get PAL (Processor Abstraction
464 Layer) information in /proc/pal. This contains useful information
465 about the processors in your systems, such as cache and TLB sizes
466 and the PAL firmware version in use.
468 To use this option, you have to ensure that the "/proc file system
469 support" (CONFIG_PROC_FS) is enabled, too.
471 config IA64_MC_ERR_INJECT
472 tristate "MC error injection support"
474 Adds support for MC error injection. If enabled, the kernel
475 will provide a sysfs interface for user applications to
476 call MC error injection PAL procedures to inject various errors.
477 This is a useful tool for MCA testing.
479 If you're unsure, do not select this option.
482 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
485 bool "ESI (Extensible SAL Interface) support"
487 If you say Y here, support is built into the kernel to
488 make ESI calls. ESI calls are used to support vendor-specific
489 firmware extensions, such as the ability to inject memory-errors
490 for test-purposes. If you're unsure, say N.
492 config IA64_HP_AML_NFW
493 bool "Support ACPI AML calls to native firmware"
495 This driver installs a global ACPI Operation Region handler for
496 region 0xA1. AML methods can use this OpRegion to call arbitrary
497 native firmware functions. The driver installs the OpRegion
498 handler if there is an HPQ5001 device or if the user supplies
499 the "force" module parameter, e.g., with the "aml_nfw.force"
500 kernel command line option.
502 source "drivers/sn/Kconfig"
505 bool "kexec system call (EXPERIMENTAL)"
506 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
508 kexec is a system call that implements the ability to shutdown your
509 current kernel, and to start another kernel. It is like a reboot
510 but it is independent of the system firmware. And like a reboot
511 you can start any kernel with it, not just Linux.
513 The name comes from the similarity to the exec system call.
515 It is an ongoing process to be certain the hardware in a machine
516 is properly shutdown, so do not be surprised if this code does not
517 initially work for you. It may help to enable device hotplugging
518 support. As of this writing the exact hardware interface is
519 strongly in flux, so no good recommendation can be made.
522 bool "kernel crash dumps (EXPERIMENTAL)"
523 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
525 Generate crash dump after being started by kexec.
527 source "drivers/firmware/Kconfig"
529 source "fs/Kconfig.binfmt"
533 menu "Power management and ACPI"
535 source "kernel/power/Kconfig"
537 source "drivers/acpi/Kconfig"
541 source "arch/ia64/kernel/cpufreq/Kconfig"
549 menu "Bus options (PCI, PCMCIA)"
554 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
555 here unless you are using a simulator without PCI support.
563 source "drivers/pci/pcie/Kconfig"
565 source "drivers/pci/Kconfig"
567 source "drivers/pci/hotplug/Kconfig"
569 source "drivers/pcmcia/Kconfig"
577 source "drivers/Kconfig"
580 tristate "Memory special operations driver"
582 select IA64_UNCACHED_ALLOCATOR
584 If you have an ia64 and you want to enable memory special
585 operations support (formerly known as fetchop), say Y here,
593 # Use the generic interrupt handling code in kernel/irq/:
595 config GENERIC_HARDIRQS
599 config GENERIC_IRQ_PROBE
603 config GENERIC_PENDING_IRQ
605 depends on GENERIC_HARDIRQS && SMP
612 source "arch/ia64/hp/sim/Kconfig"
614 source "arch/ia64/Kconfig.debug"
616 source "security/Kconfig"
618 source "crypto/Kconfig"