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 TIME_INTERPOLATION
51 select VIRTUAL_MEM_MAP
53 This selects the system type of your hardware. A "generic" kernel
54 will run on any supported IA-64 system. However, if you configure
55 a kernel for your specific system, it will be faster and smaller.
57 generic For any supported IA-64 system
58 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
59 HP-zx1/sx1000 For HP systems
60 SGI-SN2 For SGI Altix systems
61 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
63 If you don't know what to do, choose "generic".
71 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
72 support for the HP I/O MMU.
77 Selecting this option will optimize the kernel for use on sn2 based
78 systems, but the resulting kernel binary will not run on other
79 types of ia64 systems. If you have an SGI Altix system, it's safe
80 to select this option. If in doubt, select ia64 generic support
89 prompt "Processor type"
95 Select your IA-64 processor type. The default is Itanium.
96 This choice is safe for all IA-64 systems, but may not perform
97 optimally on systems with, say, Itanium 2 or newer processors.
102 Select this to configure for an Itanium 2 (McKinley) processor.
107 prompt "Kernel page size"
108 default IA64_PAGE_SIZE_16KB
110 config IA64_PAGE_SIZE_4KB
113 This lets you select the page size of the kernel. For best IA-64
114 performance, a page size of 8KB or 16KB is recommended. For best
115 IA-32 compatibility, a page size of 4KB should be selected (the vast
116 majority of IA-32 binaries work perfectly fine with a larger page
117 size). For Itanium 2 or newer systems, a page size of 64KB can also
120 4KB For best IA-32 compatibility
121 8KB For best IA-64 performance
122 16KB For best IA-64 performance
123 64KB Requires Itanium 2 or newer processor.
125 If you don't know what to do, choose 16KB.
127 config IA64_PAGE_SIZE_8KB
130 config IA64_PAGE_SIZE_16KB
133 config IA64_PAGE_SIZE_64KB
144 config ITANIUM_BSTEP_SPECIFIC
145 bool "Itanium B-step specific code"
148 Select this option to build a kernel for an Itanium prototype system
149 with a B-step CPU. You have a B-step CPU if the "revision" field in
150 /proc/cpuinfo has a value in the range from 1 to 4.
152 # align cache-sensitive data to 128 bytes
153 config IA64_L1_CACHE_SHIFT
155 default "7" if MCKINLEY
156 default "6" if ITANIUM
158 # align cache-sensitive data to 64 bytes
161 depends on !IA64_HP_SIM
162 default y if IA64_SGI_SN2
164 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
165 Access). This option is for configuring high-end multiprocessor
166 server systems. If in doubt, say N.
168 config VIRTUAL_MEM_MAP
169 bool "Virtual mem map"
170 default y if !IA64_HP_SIM
172 Say Y to compile the kernel with support for a virtual mem map.
173 This code also only takes effect if a memory hole of greater than
174 1 Gb is found during boot. You must turn this option on if you
175 require the DISCONTIGMEM option for your machine. If you are
179 bool "Discontiguous memory support"
180 depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1) && NUMA && VIRTUAL_MEM_MAP
181 default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
183 Say Y to support efficient handling of discontiguous physical memory,
184 for architectures which are either NUMA (Non-Uniform Memory Access)
185 or have huge holes in the physical address space for other reasons.
186 See <file:Documentation/vm/numa> for more.
189 bool "Cyclone (EXA) Time Source support"
191 Say Y here to enable support for IBM EXA Cyclone time source.
192 If you're unsure, answer N.
196 depends on !IA64_HP_SIM
199 config IA64_SGI_SN_SIM
200 bool "SGI Medusa Simulator Support"
201 depends on IA64_SGI_SN2
203 If you are compiling a kernel that will run under SGI's IA-64
204 simulator (Medusa) then say Y, otherwise say N.
206 config FORCE_MAX_ZONEORDER
211 bool "Symmetric multi-processing support"
213 This enables support for systems with more than one CPU. If you have
214 a system with only one CPU, say N. If you have a system with more
217 If you say N here, the kernel will run on single and multiprocessor
218 systems, but will use only one CPU of a multiprocessor system. If
219 you say Y here, the kernel will run on many, but not all,
220 single processor systems. On a single processor system, the kernel
221 will run faster if you say N here.
223 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
224 available at <http://www.tldp.org/docs.html#howto>.
226 If you don't know what to do here, say N.
229 int "Maximum number of CPUs (2-512)"
234 You should set this to the number of CPUs in your system, but
235 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
236 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
237 than 64 will cause the use of a CPU mask array, causing a small
241 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
242 depends on SMP && HOTPLUG && EXPERIMENTAL
245 Say Y here to experiment with turning CPUs off and on. CPUs
246 can be controlled through /sys/devices/system/cpu/cpu#.
247 Say N if you want to disable CPU hotplug.
250 bool "Preemptible Kernel"
252 This option reduces the latency of the kernel when reacting to
253 real-time or interactive events by allowing a low priority process to
254 be preempted even if it is in kernel mode executing a system call.
255 This allows applications to run more reliably even when the system is
258 Say Y here if you are building a kernel for a desktop, embedded
259 or real-time system. Say N if you are unsure.
263 depends on (SMP || PREEMPT)
267 bool "Support for Linux/x86 binaries"
269 IA-64 processors can execute IA-32 (X86) instructions. By
270 saying Y here, the kernel will include IA-32 system call
271 emulation support which makes it possible to transparently
272 run IA-32 Linux binaries on an IA-64 Linux system.
277 depends on IA32_SUPPORT
280 config IA64_MCA_RECOVERY
281 tristate "MCA recovery from errors other than TLB."
284 bool "Performance monitor support"
286 Selects whether support for the IA-64 performance monitor hardware
287 is included in the kernel. This makes some kernel data-structures a
288 little bigger and slows down execution a bit, but it is generally
289 a good idea to turn this on. If you're unsure, say Y.
292 tristate "/proc/pal support"
294 If you say Y here, you are able to get PAL (Processor Abstraction
295 Layer) information in /proc/pal. This contains useful information
296 about the processors in your systems, such as cache and TLB sizes
297 and the PAL firmware version in use.
299 To use this option, you have to ensure that the "/proc file system
300 support" (CONFIG_PROC_FS) is enabled, too.
302 source "drivers/firmware/Kconfig"
304 source "fs/Kconfig.binfmt"
308 menu "Power management and ACPI"
311 bool "Power Management support"
312 depends on IA64_GENERIC || IA64_DIG || IA64_HP_ZX1
315 "Power Management" means that parts of your computer are shut
316 off or put into a power conserving "sleep" mode if they are not
317 being used. There are two competing standards for doing this: APM
318 and ACPI. If you want to use either one, say Y here and then also
319 to the requisite support below.
321 Power Management is most important for battery powered laptop
322 computers; if you have a laptop, check out the Linux Laptop home
323 page on the WWW at <http://www.linux-on-laptops.com/> and the
324 Battery Powered Linux mini-HOWTO, available from
325 <http://www.tldp.org/docs.html#howto>.
327 Note that, even if you say N here, Linux on the x86 architecture
328 will issue the hlt instruction if nothing is to be done, thereby
329 sending the processor to sleep and saving power.
333 depends on !IA64_HP_SIM
338 source "drivers/acpi/Kconfig"
346 menu "Bus options (PCI, PCMCIA)"
351 Find out whether you have a PCI motherboard. PCI is the name of a
352 bus system, i.e. the way the CPU talks to the other stuff inside
353 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
354 VESA. If you have PCI, say Y, otherwise N.
356 The PCI-HOWTO, available from
357 <http://www.tldp.org/docs.html#howto>, contains valuable
358 information about which PCI hardware does work under Linux and which
365 source "drivers/pci/Kconfig"
367 source "drivers/pci/hotplug/Kconfig"
369 source "drivers/pcmcia/Kconfig"
375 source "drivers/Kconfig"
381 source "arch/ia64/hp/sim/Kconfig"
383 source "arch/ia64/oprofile/Kconfig"
385 source "arch/ia64/Kconfig.debug"
387 source "kernel/vserver/Kconfig"
389 source "security/Kconfig"
391 source "crypto/Kconfig"