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
164 source kernel/Kconfig.hz
171 # align cache-sensitive data to 128 bytes
172 config IA64_L1_CACHE_SHIFT
174 default "7" if MCKINLEY
175 default "6" if ITANIUM
177 # align cache-sensitive data to 64 bytes
180 depends on !IA64_HP_SIM
181 default y if IA64_SGI_SN2
184 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
185 Access). This option is for configuring high-end multiprocessor
186 server systems. If in doubt, say N.
188 config VIRTUAL_MEM_MAP
189 bool "Virtual mem map"
190 default y if !IA64_HP_SIM
192 Say Y to compile the kernel with support for a virtual mem map.
193 This code also only takes effect if a memory hole of greater than
194 1 Gb is found during boot. You must turn this option on if you
195 require the DISCONTIGMEM option for your machine. If you are
200 default y if VIRTUAL_MEM_MAP
202 config ARCH_DISCONTIGMEM_ENABLE
203 bool "Discontiguous memory support"
204 depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
205 default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
207 Say Y to support efficient handling of discontiguous physical memory,
208 for architectures which are either NUMA (Non-Uniform Memory Access)
209 or have huge holes in the physical address space for other reasons.
210 See <file:Documentation/vm/numa> for more.
213 bool "Cyclone (EXA) Time Source support"
215 Say Y here to enable support for IBM EXA Cyclone time source.
216 If you're unsure, answer N.
220 depends on !IA64_HP_SIM
223 config IA64_SGI_SN_SIM
224 bool "SGI Medusa Simulator Support"
225 depends on IA64_SGI_SN2 || IA64_GENERIC
227 If you are compiling a kernel that will run under SGI's IA-64
228 simulator (Medusa) then say Y, otherwise say N.
230 config IA64_SGI_SN_XP
231 tristate "Support communication between SGI SSIs"
232 select IA64_UNCACHED_ALLOCATOR
234 An SGI machine can be divided into multiple Single System
235 Images which act independently of each other and have
236 hardware based memory protection from the others. Enabling
237 this feature will allow for direct communication between SSIs
238 based on a network adapter and DMA messaging.
240 config FORCE_MAX_ZONEORDER
245 bool "Symmetric multi-processing support"
247 This enables support for systems with more than one CPU. If you have
248 a system with only one CPU, say N. If you have a system with more
251 If you say N here, the kernel will run on single and multiprocessor
252 systems, but will use only one CPU of a multiprocessor system. If
253 you say Y here, the kernel will run on many, but not all,
254 single processor systems. On a single processor system, the kernel
255 will run faster if you say N here.
257 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
258 available at <http://www.tldp.org/docs.html#howto>.
260 If you don't know what to do here, say N.
263 int "Maximum number of CPUs (2-512)"
268 You should set this to the number of CPUs in your system, but
269 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
270 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
271 than 64 will cause the use of a CPU mask array, causing a small
275 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
276 depends on SMP && EXPERIMENTAL
280 Say Y here to experiment with turning CPUs off and on. CPUs
281 can be controlled through /sys/devices/system/cpu/cpu#.
282 Say N if you want to disable CPU hotplug.
285 bool "SMT scheduler support"
289 Improves the CPU scheduler's decision making when dealing with
290 Intel IA64 chips with MultiThreading at a cost of slightly increased
291 overhead in some places. If unsure say N here.
294 bool "Preemptible Kernel"
296 This option reduces the latency of the kernel when reacting to
297 real-time or interactive events by allowing a low priority process to
298 be preempted even if it is in kernel mode executing a system call.
299 This allows applications to run more reliably even when the system is
302 Say Y here if you are building a kernel for a desktop, embedded
303 or real-time system. Say N if you are unsure.
309 depends on (SMP || PREEMPT)
313 bool "Support for Linux/x86 binaries"
315 IA-64 processors can execute IA-32 (X86) instructions. By
316 saying Y here, the kernel will include IA-32 system call
317 emulation support which makes it possible to transparently
318 run IA-32 Linux binaries on an IA-64 Linux system.
323 depends on IA32_SUPPORT
326 config IA64_MCA_RECOVERY
327 tristate "MCA recovery from errors other than TLB."
330 bool "Performance monitor support"
332 Selects whether support for the IA-64 performance monitor hardware
333 is included in the kernel. This makes some kernel data-structures a
334 little bigger and slows down execution a bit, but it is generally
335 a good idea to turn this on. If you're unsure, say Y.
338 tristate "/proc/pal support"
340 If you say Y here, you are able to get PAL (Processor Abstraction
341 Layer) information in /proc/pal. This contains useful information
342 about the processors in your systems, such as cache and TLB sizes
343 and the PAL firmware version in use.
345 To use this option, you have to ensure that the "/proc file system
346 support" (CONFIG_PROC_FS) is enabled, too.
348 config ACPI_DEALLOCATE_IRQ
350 depends on IOSAPIC && EXPERIMENTAL
353 source "drivers/firmware/Kconfig"
355 source "fs/Kconfig.binfmt"
359 menu "Power management and ACPI"
362 bool "Power Management support"
363 depends on !IA64_HP_SIM
366 "Power Management" means that parts of your computer are shut
367 off or put into a power conserving "sleep" mode if they are not
368 being used. There are two competing standards for doing this: APM
369 and ACPI. If you want to use either one, say Y here and then also
370 to the requisite support below.
372 Power Management is most important for battery powered laptop
373 computers; if you have a laptop, check out the Linux Laptop home
374 page on the WWW at <http://www.linux-on-laptops.com/> and the
375 Battery Powered Linux mini-HOWTO, available from
376 <http://www.tldp.org/docs.html#howto>.
378 Note that, even if you say N here, Linux on the x86 architecture
379 will issue the hlt instruction if nothing is to be done, thereby
380 sending the processor to sleep and saving power.
384 depends on !IA64_HP_SIM
389 source "drivers/acpi/Kconfig"
397 menu "Bus options (PCI, PCMCIA)"
402 Find out whether you have a PCI motherboard. PCI is the name of a
403 bus system, i.e. the way the CPU talks to the other stuff inside
404 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
405 VESA. If you have PCI, say Y, otherwise N.
407 The PCI-HOWTO, available from
408 <http://www.tldp.org/docs.html#howto>, contains valuable
409 information about which PCI hardware does work under Linux and which
416 source "drivers/pci/Kconfig"
418 source "drivers/pci/hotplug/Kconfig"
420 source "drivers/pcmcia/Kconfig"
426 source "drivers/Kconfig"
433 # Use the generic interrupt handling code in kernel/irq/:
435 config GENERIC_HARDIRQS
439 config GENERIC_IRQ_PROBE
443 source "arch/ia64/hp/sim/Kconfig"
445 source "arch/ia64/oprofile/Kconfig"
447 source "arch/ia64/Kconfig.debug"
449 source "security/Kconfig"
451 source "crypto/Kconfig"