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"
16 The Itanium Processor Family is Intel's 64-bit successor to
17 the 32-bit X86 line. The IA-64 Linux project has a home
18 page at <http://www.linuxia64.org/> and a mailing list at
19 <linux-ia64@vger.kernel.org>.
29 config RWSEM_XCHGADD_ALGORITHM
33 config GENERIC_CALIBRATE_DELAY
37 config TIME_INTERPOLATION
49 config SCHED_NO_NO_OMIT_FRAME_POINTER
53 config IA64_UNCACHED_ALLOCATOR
55 select GENERIC_ALLOCATOR
65 select VIRTUAL_MEM_MAP
68 This selects the system type of your hardware. A "generic" kernel
69 will run on any supported IA-64 system. However, if you configure
70 a kernel for your specific system, it will be faster and smaller.
72 generic For any supported IA-64 system
73 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
74 HP-zx1/sx1000 For HP systems
75 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
76 SGI-SN2 For SGI Altix systems
77 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
79 If you don't know what to do, choose "generic".
87 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
88 support for the HP I/O MMU.
90 config IA64_HP_ZX1_SWIOTLB
91 bool "HP-zx1/sx1000 with software I/O TLB"
93 Build a kernel that runs on HP zx1 and sx1000 systems even when they
94 have broken PCI devices which cannot DMA to full 32 bits. Apart
95 from support for the HP I/O MMU, this includes support for the software
96 I/O TLB, which allows supporting the broken devices at the expense of
97 wasting some kernel memory (about 2MB by default).
102 Selecting this option will optimize the kernel for use on sn2 based
103 systems, but the resulting kernel binary will not run on other
104 types of ia64 systems. If you have an SGI Altix system, it's safe
105 to select this option. If in doubt, select ia64 generic support
114 prompt "Processor type"
120 Select your IA-64 processor type. The default is Itanium.
121 This choice is safe for all IA-64 systems, but may not perform
122 optimally on systems with, say, Itanium 2 or newer processors.
127 Select this to configure for an Itanium 2 (McKinley) processor.
132 prompt "Kernel page size"
133 default IA64_PAGE_SIZE_16KB
135 config IA64_PAGE_SIZE_4KB
138 This lets you select the page size of the kernel. For best IA-64
139 performance, a page size of 8KB or 16KB is recommended. For best
140 IA-32 compatibility, a page size of 4KB should be selected (the vast
141 majority of IA-32 binaries work perfectly fine with a larger page
142 size). For Itanium 2 or newer systems, a page size of 64KB can also
145 4KB For best IA-32 compatibility
146 8KB For best IA-64 performance
147 16KB For best IA-64 performance
148 64KB Requires Itanium 2 or newer processor.
150 If you don't know what to do, choose 16KB.
152 config IA64_PAGE_SIZE_8KB
155 config IA64_PAGE_SIZE_16KB
158 config IA64_PAGE_SIZE_64KB
169 # align cache-sensitive data to 128 bytes
170 config IA64_L1_CACHE_SHIFT
172 default "7" if MCKINLEY
173 default "6" if ITANIUM
175 # align cache-sensitive data to 64 bytes
178 depends on !IA64_HP_SIM
179 default y if IA64_SGI_SN2
182 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
183 Access). This option is for configuring high-end multiprocessor
184 server systems. If in doubt, say N.
186 config VIRTUAL_MEM_MAP
187 bool "Virtual mem map"
188 default y if !IA64_HP_SIM
190 Say Y to compile the kernel with support for a virtual mem map.
191 This code also only takes effect if a memory hole of greater than
192 1 Gb is found during boot. You must turn this option on if you
193 require the DISCONTIGMEM option for your machine. If you are
198 default y if VIRTUAL_MEM_MAP
200 config ARCH_DISCONTIGMEM_ENABLE
201 bool "Discontiguous memory support"
202 depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
203 default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
205 Say Y to support efficient handling of discontiguous physical memory,
206 for architectures which are either NUMA (Non-Uniform Memory Access)
207 or have huge holes in the physical address space for other reasons.
208 See <file:Documentation/vm/numa> for more.
211 bool "Cyclone (EXA) Time Source support"
213 Say Y here to enable support for IBM EXA Cyclone time source.
214 If you're unsure, answer N.
218 depends on !IA64_HP_SIM
221 config IA64_SGI_SN_SIM
222 bool "SGI Medusa Simulator Support"
223 depends on IA64_SGI_SN2 || IA64_GENERIC
225 If you are compiling a kernel that will run under SGI's IA-64
226 simulator (Medusa) then say Y, otherwise say N.
228 config IA64_SGI_SN_XP
229 tristate "Support communication between SGI SSIs"
230 select IA64_UNCACHED_ALLOCATOR
232 An SGI machine can be divided into multiple Single System
233 Images which act independently of each other and have
234 hardware based memory protection from the others. Enabling
235 this feature will allow for direct communication between SSIs
236 based on a network adapter and DMA messaging.
238 config FORCE_MAX_ZONEORDER
243 bool "Symmetric multi-processing support"
245 This enables support for systems with more than one CPU. If you have
246 a system with only one CPU, say N. If you have a system with more
249 If you say N here, the kernel will run on single and multiprocessor
250 systems, but will use only one CPU of a multiprocessor system. If
251 you say Y here, the kernel will run on many, but not all,
252 single processor systems. On a single processor system, the kernel
253 will run faster if you say N here.
255 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
256 available at <http://www.tldp.org/docs.html#howto>.
258 If you don't know what to do here, say N.
261 int "Maximum number of CPUs (2-512)"
266 You should set this to the number of CPUs in your system, but
267 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
268 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
269 than 64 will cause the use of a CPU mask array, causing a small
273 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
274 depends on SMP && EXPERIMENTAL
278 Say Y here to experiment with turning CPUs off and on. CPUs
279 can be controlled through /sys/devices/system/cpu/cpu#.
280 Say N if you want to disable CPU hotplug.
283 bool "SMT scheduler support"
287 Improves the CPU scheduler's decision making when dealing with
288 Intel IA64 chips with MultiThreading at a cost of slightly increased
289 overhead in some places. If unsure say N here.
292 bool "Preemptible Kernel"
294 This option reduces the latency of the kernel when reacting to
295 real-time or interactive events by allowing a low priority process to
296 be preempted even if it is in kernel mode executing a system call.
297 This allows applications to run more reliably even when the system is
300 Say Y here if you are building a kernel for a desktop, embedded
301 or real-time system. Say N if you are unsure.
307 depends on (SMP || PREEMPT)
311 bool "Support for Linux/x86 binaries"
313 IA-64 processors can execute IA-32 (X86) instructions. By
314 saying Y here, the kernel will include IA-32 system call
315 emulation support which makes it possible to transparently
316 run IA-32 Linux binaries on an IA-64 Linux system.
321 depends on IA32_SUPPORT
324 config IA64_MCA_RECOVERY
325 tristate "MCA recovery from errors other than TLB."
328 bool "Performance monitor support"
330 Selects whether support for the IA-64 performance monitor hardware
331 is included in the kernel. This makes some kernel data-structures a
332 little bigger and slows down execution a bit, but it is generally
333 a good idea to turn this on. If you're unsure, say Y.
336 tristate "/proc/pal support"
338 If you say Y here, you are able to get PAL (Processor Abstraction
339 Layer) information in /proc/pal. This contains useful information
340 about the processors in your systems, such as cache and TLB sizes
341 and the PAL firmware version in use.
343 To use this option, you have to ensure that the "/proc file system
344 support" (CONFIG_PROC_FS) is enabled, too.
346 config ACPI_DEALLOCATE_IRQ
348 depends on IOSAPIC && EXPERIMENTAL
351 source "drivers/firmware/Kconfig"
353 source "fs/Kconfig.binfmt"
357 menu "Power management and ACPI"
360 bool "Power Management support"
361 depends on !IA64_HP_SIM
364 "Power Management" means that parts of your computer are shut
365 off or put into a power conserving "sleep" mode if they are not
366 being used. There are two competing standards for doing this: APM
367 and ACPI. If you want to use either one, say Y here and then also
368 to the requisite support below.
370 Power Management is most important for battery powered laptop
371 computers; if you have a laptop, check out the Linux Laptop home
372 page on the WWW at <http://www.linux-on-laptops.com/> and the
373 Battery Powered Linux mini-HOWTO, available from
374 <http://www.tldp.org/docs.html#howto>.
376 Note that, even if you say N here, Linux on the x86 architecture
377 will issue the hlt instruction if nothing is to be done, thereby
378 sending the processor to sleep and saving power.
382 depends on !IA64_HP_SIM
387 source "drivers/acpi/Kconfig"
395 menu "Bus options (PCI, PCMCIA)"
400 Find out whether you have a PCI motherboard. PCI is the name of a
401 bus system, i.e. the way the CPU talks to the other stuff inside
402 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
403 VESA. If you have PCI, say Y, otherwise N.
405 The PCI-HOWTO, available from
406 <http://www.tldp.org/docs.html#howto>, contains valuable
407 information about which PCI hardware does work under Linux and which
414 source "drivers/pci/Kconfig"
416 source "drivers/pci/hotplug/Kconfig"
418 source "drivers/pcmcia/Kconfig"
424 source "drivers/Kconfig"
431 # Use the generic interrupt handling code in kernel/irq/:
433 config GENERIC_HARDIRQS
437 config GENERIC_IRQ_PROBE
441 source "arch/ia64/hp/sim/Kconfig"
443 source "arch/ia64/oprofile/Kconfig"
445 source "arch/ia64/Kconfig.debug"
447 source "security/Kconfig"
449 source "crypto/Kconfig"