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
20 The Itanium Processor Family is Intel's 64-bit successor to
21 the 32-bit X86 line. The IA-64 Linux project has a home
22 page at <http://www.linuxia64.org/> and a mailing list at
23 <linux-ia64@vger.kernel.org>.
27 select ATA_NONSTANDARD if ATA
32 depends on !IA64_SGI_SN2
45 config GENERIC_LOCKBREAK
48 depends on SMP && PREEMPT
50 config RWSEM_XCHGADD_ALGORITHM
54 config ARCH_HAS_ILOG2_U32
58 config ARCH_HAS_ILOG2_U64
62 config HUGETLB_PAGE_SIZE_VARIABLE
64 depends on HUGETLB_PAGE
67 config GENERIC_FIND_NEXT_BIT
71 config GENERIC_CALIBRATE_DELAY
79 config GENERIC_TIME_VSYSCALL
95 config SCHED_NO_NO_OMIT_FRAME_POINTER
99 config IA64_UNCACHED_ALLOCATOR
101 select GENERIC_ALLOCATOR
117 This selects the system type of your hardware. A "generic" kernel
118 will run on any supported IA-64 system. However, if you configure
119 a kernel for your specific system, it will be faster and smaller.
121 generic For any supported IA-64 system
122 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
123 HP-zx1/sx1000 For HP systems
124 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
125 SGI-SN2 For SGI Altix systems
126 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
128 If you don't know what to do, choose "generic".
137 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
138 support for the HP I/O MMU.
140 config IA64_HP_ZX1_SWIOTLB
141 bool "HP-zx1/sx1000 with software I/O TLB"
144 Build a kernel that runs on HP zx1 and sx1000 systems even when they
145 have broken PCI devices which cannot DMA to full 32 bits. Apart
146 from support for the HP I/O MMU, this includes support for the software
147 I/O TLB, which allows supporting the broken devices at the expense of
148 wasting some kernel memory (about 2MB by default).
153 Selecting this option will optimize the kernel for use on sn2 based
154 systems, but the resulting kernel binary will not run on other
155 types of ia64 systems. If you have an SGI Altix system, it's safe
156 to select this option. If in doubt, select ia64 generic support
166 prompt "Processor type"
172 Select your IA-64 processor type. The default is Itanium.
173 This choice is safe for all IA-64 systems, but may not perform
174 optimally on systems with, say, Itanium 2 or newer processors.
179 Select this to configure for an Itanium 2 (McKinley) processor.
184 prompt "Kernel page size"
185 default IA64_PAGE_SIZE_16KB
187 config IA64_PAGE_SIZE_4KB
190 This lets you select the page size of the kernel. For best IA-64
191 performance, a page size of 8KB or 16KB is recommended. For best
192 IA-32 compatibility, a page size of 4KB should be selected (the vast
193 majority of IA-32 binaries work perfectly fine with a larger page
194 size). For Itanium 2 or newer systems, a page size of 64KB can also
197 4KB For best IA-32 compatibility
198 8KB For best IA-64 performance
199 16KB For best IA-64 performance
200 64KB Requires Itanium 2 or newer processor.
202 If you don't know what to do, choose 16KB.
204 config IA64_PAGE_SIZE_8KB
207 config IA64_PAGE_SIZE_16KB
210 config IA64_PAGE_SIZE_64KB
217 prompt "Page Table Levels"
224 depends on !IA64_PAGE_SIZE_64KB
229 source kernel/Kconfig.hz
236 # align cache-sensitive data to 128 bytes
237 config IA64_L1_CACHE_SHIFT
239 default "7" if MCKINLEY
240 default "6" if ITANIUM
243 bool "Cyclone (EXA) Time Source support"
245 Say Y here to enable support for IBM EXA Cyclone time source.
246 If you're unsure, answer N.
250 depends on !IA64_HP_SIM
253 config IA64_SGI_SN_XP
254 tristate "Support communication between SGI SSIs"
255 depends on IA64_GENERIC || IA64_SGI_SN2
256 select IA64_UNCACHED_ALLOCATOR
258 An SGI machine can be divided into multiple Single System
259 Images which act independently of each other and have
260 hardware based memory protection from the others. Enabling
261 this feature will allow for direct communication between SSIs
262 based on a network adapter and DMA messaging.
264 config FORCE_MAX_ZONEORDER
265 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
266 range 11 17 if !HUGETLB_PAGE
267 default "17" if HUGETLB_PAGE
271 bool "Symmetric multi-processing support"
273 This enables support for systems with more than one CPU. If you have
274 a system with only one CPU, say N. If you have a system with more
277 If you say N here, the kernel will run on single and multiprocessor
278 systems, but will use only one CPU of a multiprocessor system. If
279 you say Y here, the kernel will run on many, but not all,
280 single processor systems. On a single processor system, the kernel
281 will run faster if you say N here.
283 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
284 available at <http://www.tldp.org/docs.html#howto>.
286 If you don't know what to do here, say N.
289 int "Maximum number of CPUs (2-1024)"
294 You should set this to the number of CPUs in your system, but
295 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
296 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
297 than 64 will cause the use of a CPU mask array, causing a small
301 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
302 depends on SMP && EXPERIMENTAL
306 Say Y here to experiment with turning CPUs off and on. CPUs
307 can be controlled through /sys/devices/system/cpu/cpu#.
308 Say N if you want to disable CPU hotplug.
310 config ARCH_ENABLE_MEMORY_HOTPLUG
313 config ARCH_ENABLE_MEMORY_HOTREMOVE
317 bool "SMT scheduler support"
320 Improves the CPU scheduler's decision making when dealing with
321 Intel IA64 chips with MultiThreading at a cost of slightly increased
322 overhead in some places. If unsure say N here.
324 config PERMIT_BSP_REMOVE
325 bool "Support removal of Bootstrap Processor"
326 depends on HOTPLUG_CPU
329 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
332 config FORCE_CPEI_RETARGET
333 bool "Force assumption that CPEI can be re-targetted"
334 depends on PERMIT_BSP_REMOVE
337 Say Y if you need to force the assumption that CPEI can be re-targetted to
338 any cpu in the system. This hint is available via ACPI 3.0 specifications.
339 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
340 This option it useful to enable this feature on older BIOS's as well.
341 You can also enable this by using boot command line option force_cpei=1.
343 source "kernel/Kconfig.preempt"
347 config ARCH_SELECT_MEMORY_MODEL
350 config ARCH_DISCONTIGMEM_ENABLE
353 Say Y to support efficient handling of discontiguous physical memory,
354 for architectures which are either NUMA (Non-Uniform Memory Access)
355 or have huge holes in the physical address space for other reasons.
356 See <file:Documentation/vm/numa> for more.
358 config ARCH_FLATMEM_ENABLE
361 config ARCH_SPARSEMEM_ENABLE
363 depends on ARCH_DISCONTIGMEM_ENABLE
364 select SPARSEMEM_VMEMMAP_ENABLE
366 config ARCH_DISCONTIGMEM_DEFAULT
367 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
368 depends on ARCH_DISCONTIGMEM_ENABLE
372 depends on !IA64_HP_SIM && !FLATMEM
373 default y if IA64_SGI_SN2
374 select ACPI_NUMA if ACPI
376 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
377 Access). This option is for configuring high-end multiprocessor
378 server systems. If in doubt, say N.
381 int "Max num nodes shift(3-10)"
384 depends on NEED_MULTIPLE_NODES
386 This option specifies the maximum number of nodes in your SSI system.
387 MAX_NUMNODES will be 2^(This value).
388 If in doubt, use the default.
390 config ARCH_POPULATES_NODE_MAP
393 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
394 # VIRTUAL_MEM_MAP has been retained for historical reasons.
395 config VIRTUAL_MEM_MAP
396 bool "Virtual mem map"
397 depends on !SPARSEMEM
398 default y if !IA64_HP_SIM
400 Say Y to compile the kernel with support for a virtual mem map.
401 This code also only takes effect if a memory hole of greater than
402 1 Gb is found during boot. You must turn this option on if you
403 require the DISCONTIGMEM option for your machine. If you are
408 default y if VIRTUAL_MEM_MAP
410 config HAVE_ARCH_EARLY_PFN_TO_NID
412 depends on NEED_MULTIPLE_NODES
414 config HAVE_ARCH_NODEDATA_EXTENSION
419 bool "Support for Linux/x86 binaries"
421 IA-64 processors can execute IA-32 (X86) instructions. By
422 saying Y here, the kernel will include IA-32 system call
423 emulation support which makes it possible to transparently
424 run IA-32 Linux binaries on an IA-64 Linux system.
429 depends on IA32_SUPPORT
432 config COMPAT_FOR_U64_ALIGNMENT
435 config IA64_MCA_RECOVERY
436 tristate "MCA recovery from errors other than TLB."
439 bool "Performance monitor support"
441 Selects whether support for the IA-64 performance monitor hardware
442 is included in the kernel. This makes some kernel data-structures a
443 little bigger and slows down execution a bit, but it is generally
444 a good idea to turn this on. If you're unsure, say Y.
447 tristate "/proc/pal support"
449 If you say Y here, you are able to get PAL (Processor Abstraction
450 Layer) information in /proc/pal. This contains useful information
451 about the processors in your systems, such as cache and TLB sizes
452 and the PAL firmware version in use.
454 To use this option, you have to ensure that the "/proc file system
455 support" (CONFIG_PROC_FS) is enabled, too.
457 config IA64_MC_ERR_INJECT
458 tristate "MC error injection support"
460 Adds support for MC error injection. If enabled, the kernel
461 will provide a sysfs interface for user applications to
462 call MC error injection PAL procedures to inject various errors.
463 This is a useful tool for MCA testing.
465 If you're unsure, do not select this option.
468 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
471 bool "ESI (Extensible SAL Interface) support"
473 If you say Y here, support is built into the kernel to
474 make ESI calls. ESI calls are used to support vendor-specific
475 firmware extensions, such as the ability to inject memory-errors
476 for test-purposes. If you're unsure, say N.
478 config IA64_HP_AML_NFW
479 bool "Support ACPI AML calls to native firmware"
481 This driver installs a global ACPI Operation Region handler for
482 region 0xA1. AML methods can use this OpRegion to call arbitrary
483 native firmware functions. The driver installs the OpRegion
484 handler if there is an HPQ5001 device or if the user supplies
485 the "force" module parameter, e.g., with the "aml_nfw.force"
486 kernel command line option.
488 source "drivers/sn/Kconfig"
491 bool "kexec system call (EXPERIMENTAL)"
492 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
494 kexec is a system call that implements the ability to shutdown your
495 current kernel, and to start another kernel. It is like a reboot
496 but it is independent of the system firmware. And like a reboot
497 you can start any kernel with it, not just Linux.
499 The name comes from the similarity to the exec system call.
501 It is an ongoing process to be certain the hardware in a machine
502 is properly shutdown, so do not be surprised if this code does not
503 initially work for you. It may help to enable device hotplugging
504 support. As of this writing the exact hardware interface is
505 strongly in flux, so no good recommendation can be made.
508 bool "kernel crash dumps (EXPERIMENTAL)"
509 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
511 Generate crash dump after being started by kexec.
513 source "drivers/firmware/Kconfig"
515 source "fs/Kconfig.binfmt"
519 menu "Power management and ACPI"
521 source "kernel/power/Kconfig"
523 source "drivers/acpi/Kconfig"
527 source "arch/ia64/kernel/cpufreq/Kconfig"
535 menu "Bus options (PCI, PCMCIA)"
540 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
541 here unless you are using a simulator without PCI support.
549 source "drivers/pci/pcie/Kconfig"
551 source "drivers/pci/Kconfig"
553 source "drivers/pci/hotplug/Kconfig"
555 source "drivers/pcmcia/Kconfig"
563 source "drivers/Kconfig"
566 tristate "Memory special operations driver"
568 select IA64_UNCACHED_ALLOCATOR
570 If you have an ia64 and you want to enable memory special
571 operations support (formerly known as fetchop), say Y here,
579 # Use the generic interrupt handling code in kernel/irq/:
581 config GENERIC_HARDIRQS
585 config GENERIC_IRQ_PROBE
589 config GENERIC_PENDING_IRQ
591 depends on GENERIC_HARDIRQS && SMP
598 source "arch/ia64/hp/sim/Kconfig"
600 source "kernel/Kconfig.instrumentation"
602 source "arch/ia64/Kconfig.debug"
604 source "security/Kconfig"
606 source "crypto/Kconfig"