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
53 select VIRTUAL_MEM_MAP
56 This selects the system type of your hardware. A "generic" kernel
57 will run on any supported IA-64 system. However, if you configure
58 a kernel for your specific system, it will be faster and smaller.
60 generic For any supported IA-64 system
61 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
62 HP-zx1/sx1000 For HP systems
63 SGI-SN2 For SGI Altix systems
64 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
66 If you don't know what to do, choose "generic".
74 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
75 support for the HP I/O MMU.
80 Selecting this option will optimize the kernel for use on sn2 based
81 systems, but the resulting kernel binary will not run on other
82 types of ia64 systems. If you have an SGI Altix system, it's safe
83 to select this option. If in doubt, select ia64 generic support
92 prompt "Processor type"
98 Select your IA-64 processor type. The default is Itanium.
99 This choice is safe for all IA-64 systems, but may not perform
100 optimally on systems with, say, Itanium 2 or newer processors.
105 Select this to configure for an Itanium 2 (McKinley) processor.
110 prompt "Kernel page size"
111 default IA64_PAGE_SIZE_16KB
113 config IA64_PAGE_SIZE_4KB
116 This lets you select the page size of the kernel. For best IA-64
117 performance, a page size of 8KB or 16KB is recommended. For best
118 IA-32 compatibility, a page size of 4KB should be selected (the vast
119 majority of IA-32 binaries work perfectly fine with a larger page
120 size). For Itanium 2 or newer systems, a page size of 64KB can also
123 4KB For best IA-32 compatibility
124 8KB For best IA-64 performance
125 16KB For best IA-64 performance
126 64KB Requires Itanium 2 or newer processor.
128 If you don't know what to do, choose 16KB.
130 config IA64_PAGE_SIZE_8KB
133 config IA64_PAGE_SIZE_16KB
136 config IA64_PAGE_SIZE_64KB
147 config ITANIUM_BSTEP_SPECIFIC
148 bool "Itanium B-step specific code"
151 Select this option to build a kernel for an Itanium prototype system
152 with a B-step CPU. You have a B-step CPU if the "revision" field in
153 /proc/cpuinfo has a value in the range from 1 to 4.
155 # align cache-sensitive data to 128 bytes
156 config IA64_L1_CACHE_SHIFT
158 default "7" if MCKINLEY
159 default "6" if ITANIUM
161 # align cache-sensitive data to 64 bytes
164 depends on !IA64_HP_SIM
165 default y if IA64_SGI_SN2
167 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
168 Access). This option is for configuring high-end multiprocessor
169 server systems. If in doubt, say N.
171 config VIRTUAL_MEM_MAP
172 bool "Virtual mem map"
173 default y if !IA64_HP_SIM
175 Say Y to compile the kernel with support for a virtual mem map.
176 This code also only takes effect if a memory hole of greater than
177 1 Gb is found during boot. You must turn this option on if you
178 require the DISCONTIGMEM option for your machine. If you are
182 bool "Discontiguous memory support"
183 depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1) && NUMA && VIRTUAL_MEM_MAP
184 default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
186 Say Y to support efficient handling of discontiguous physical memory,
187 for architectures which are either NUMA (Non-Uniform Memory Access)
188 or have huge holes in the physical address space for other reasons.
189 See <file:Documentation/vm/numa> for more.
192 bool "Cyclone (EXA) Time Source support"
194 Say Y here to enable support for IBM EXA Cyclone time source.
195 If you're unsure, answer N.
199 depends on !IA64_HP_SIM
202 config IA64_SGI_SN_SIM
203 bool "SGI Medusa Simulator Support"
204 depends on IA64_SGI_SN2
206 If you are compiling a kernel that will run under SGI's IA-64
207 simulator (Medusa) then say Y, otherwise say N.
209 config FORCE_MAX_ZONEORDER
214 bool "Symmetric multi-processing support"
216 This enables support for systems with more than one CPU. If you have
217 a system with only one CPU, say N. If you have a system with more
220 If you say N here, the kernel will run on single and multiprocessor
221 systems, but will use only one CPU of a multiprocessor system. If
222 you say Y here, the kernel will run on many, but not all,
223 single processor systems. On a single processor system, the kernel
224 will run faster if you say N here.
226 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
227 available at <http://www.tldp.org/docs.html#howto>.
229 If you don't know what to do here, say N.
232 int "Maximum number of CPUs (2-512)"
237 You should set this to the number of CPUs in your system, but
238 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
239 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
240 than 64 will cause the use of a CPU mask array, causing a small
244 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
245 depends on SMP && HOTPLUG && EXPERIMENTAL
248 Say Y here to experiment with turning CPUs off and on. CPUs
249 can be controlled through /sys/devices/system/cpu/cpu#.
250 Say N if you want to disable CPU hotplug.
253 bool "Preemptible Kernel"
255 This option reduces the latency of the kernel when reacting to
256 real-time or interactive events by allowing a low priority process to
257 be preempted even if it is in kernel mode executing a system call.
258 This allows applications to run more reliably even when the system is
261 Say Y here if you are building a kernel for a desktop, embedded
262 or real-time system. Say N if you are unsure.
266 depends on (SMP || PREEMPT)
270 bool "Support for Linux/x86 binaries"
272 IA-64 processors can execute IA-32 (X86) instructions. By
273 saying Y here, the kernel will include IA-32 system call
274 emulation support which makes it possible to transparently
275 run IA-32 Linux binaries on an IA-64 Linux system.
280 depends on IA32_SUPPORT
283 config IA64_MCA_RECOVERY
284 tristate "MCA recovery from errors other than TLB."
287 bool "Performance monitor support"
289 Selects whether support for the IA-64 performance monitor hardware
290 is included in the kernel. This makes some kernel data-structures a
291 little bigger and slows down execution a bit, but it is generally
292 a good idea to turn this on. If you're unsure, say Y.
295 tristate "/proc/pal support"
297 If you say Y here, you are able to get PAL (Processor Abstraction
298 Layer) information in /proc/pal. This contains useful information
299 about the processors in your systems, such as cache and TLB sizes
300 and the PAL firmware version in use.
302 To use this option, you have to ensure that the "/proc file system
303 support" (CONFIG_PROC_FS) is enabled, too.
305 source "drivers/firmware/Kconfig"
307 source "fs/Kconfig.binfmt"
311 menu "Power management and ACPI"
314 bool "Power Management support"
315 depends on IA64_GENERIC || IA64_DIG || IA64_HP_ZX1
318 "Power Management" means that parts of your computer are shut
319 off or put into a power conserving "sleep" mode if they are not
320 being used. There are two competing standards for doing this: APM
321 and ACPI. If you want to use either one, say Y here and then also
322 to the requisite support below.
324 Power Management is most important for battery powered laptop
325 computers; if you have a laptop, check out the Linux Laptop home
326 page on the WWW at <http://www.linux-on-laptops.com/> and the
327 Battery Powered Linux mini-HOWTO, available from
328 <http://www.tldp.org/docs.html#howto>.
330 Note that, even if you say N here, Linux on the x86 architecture
331 will issue the hlt instruction if nothing is to be done, thereby
332 sending the processor to sleep and saving power.
336 depends on !IA64_HP_SIM
341 source "drivers/acpi/Kconfig"
349 menu "Bus options (PCI, PCMCIA)"
354 Find out whether you have a PCI motherboard. PCI is the name of a
355 bus system, i.e. the way the CPU talks to the other stuff inside
356 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
357 VESA. If you have PCI, say Y, otherwise N.
359 The PCI-HOWTO, available from
360 <http://www.tldp.org/docs.html#howto>, contains valuable
361 information about which PCI hardware does work under Linux and which
368 source "drivers/pci/Kconfig"
370 source "drivers/pci/hotplug/Kconfig"
372 source "drivers/pcmcia/Kconfig"
378 source "drivers/Kconfig"
384 source "arch/ia64/hp/sim/Kconfig"
386 source "arch/ia64/oprofile/Kconfig"
388 source "arch/ia64/Kconfig.debug"
390 source "kernel/vserver/Kconfig"
392 source "security/Kconfig"
394 source "crypto/Kconfig"