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
57 select VIRTUAL_MEM_MAP
60 This selects the system type of your hardware. A "generic" kernel
61 will run on any supported IA-64 system. However, if you configure
62 a kernel for your specific system, it will be faster and smaller.
64 generic For any supported IA-64 system
65 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
66 HP-zx1/sx1000 For HP systems
67 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
68 SGI-SN2 For SGI Altix systems
69 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
71 If you don't know what to do, choose "generic".
79 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
80 support for the HP I/O MMU.
82 config IA64_HP_ZX1_SWIOTLB
83 bool "HP-zx1/sx1000 with software I/O TLB"
85 Build a kernel that runs on HP zx1 and sx1000 systems even when they
86 have broken PCI devices which cannot DMA to full 32 bits. Apart
87 from support for the HP I/O MMU, this includes support for the software
88 I/O TLB, which allows supporting the broken devices at the expense of
89 wasting some kernel memory (about 2MB by default).
94 Selecting this option will optimize the kernel for use on sn2 based
95 systems, but the resulting kernel binary will not run on other
96 types of ia64 systems. If you have an SGI Altix system, it's safe
97 to select this option. If in doubt, select ia64 generic support
106 prompt "Processor type"
112 Select your IA-64 processor type. The default is Itanium.
113 This choice is safe for all IA-64 systems, but may not perform
114 optimally on systems with, say, Itanium 2 or newer processors.
119 Select this to configure for an Itanium 2 (McKinley) processor.
124 prompt "Kernel page size"
125 default IA64_PAGE_SIZE_16KB
127 config IA64_PAGE_SIZE_4KB
130 This lets you select the page size of the kernel. For best IA-64
131 performance, a page size of 8KB or 16KB is recommended. For best
132 IA-32 compatibility, a page size of 4KB should be selected (the vast
133 majority of IA-32 binaries work perfectly fine with a larger page
134 size). For Itanium 2 or newer systems, a page size of 64KB can also
137 4KB For best IA-32 compatibility
138 8KB For best IA-64 performance
139 16KB For best IA-64 performance
140 64KB Requires Itanium 2 or newer processor.
142 If you don't know what to do, choose 16KB.
144 config IA64_PAGE_SIZE_8KB
147 config IA64_PAGE_SIZE_16KB
150 config IA64_PAGE_SIZE_64KB
161 # align cache-sensitive data to 128 bytes
162 config IA64_L1_CACHE_SHIFT
164 default "7" if MCKINLEY
165 default "6" if ITANIUM
167 # align cache-sensitive data to 64 bytes
170 depends on !IA64_HP_SIM
171 default y if IA64_SGI_SN2
174 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
175 Access). This option is for configuring high-end multiprocessor
176 server systems. If in doubt, say N.
178 config VIRTUAL_MEM_MAP
179 bool "Virtual mem map"
180 default y if !IA64_HP_SIM
182 Say Y to compile the kernel with support for a virtual mem map.
183 This code also only takes effect if a memory hole of greater than
184 1 Gb is found during boot. You must turn this option on if you
185 require the DISCONTIGMEM option for your machine. If you are
190 default y if VIRTUAL_MEM_MAP
193 bool "Discontiguous memory support"
194 depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
195 default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
197 Say Y to support efficient handling of discontiguous physical memory,
198 for architectures which are either NUMA (Non-Uniform Memory Access)
199 or have huge holes in the physical address space for other reasons.
200 See <file:Documentation/vm/numa> for more.
203 bool "Cyclone (EXA) Time Source support"
205 Say Y here to enable support for IBM EXA Cyclone time source.
206 If you're unsure, answer N.
210 depends on !IA64_HP_SIM
213 config IA64_SGI_SN_SIM
214 bool "SGI Medusa Simulator Support"
215 depends on IA64_SGI_SN2
217 If you are compiling a kernel that will run under SGI's IA-64
218 simulator (Medusa) then say Y, otherwise say N.
220 config FORCE_MAX_ZONEORDER
225 bool "Symmetric multi-processing support"
227 This enables support for systems with more than one CPU. If you have
228 a system with only one CPU, say N. If you have a system with more
231 If you say N here, the kernel will run on single and multiprocessor
232 systems, but will use only one CPU of a multiprocessor system. If
233 you say Y here, the kernel will run on many, but not all,
234 single processor systems. On a single processor system, the kernel
235 will run faster if you say N here.
237 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
238 available at <http://www.tldp.org/docs.html#howto>.
240 If you don't know what to do here, say N.
243 int "Maximum number of CPUs (2-512)"
248 You should set this to the number of CPUs in your system, but
249 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
250 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
251 than 64 will cause the use of a CPU mask array, causing a small
255 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
256 depends on SMP && EXPERIMENTAL
260 Say Y here to experiment with turning CPUs off and on. CPUs
261 can be controlled through /sys/devices/system/cpu/cpu#.
262 Say N if you want to disable CPU hotplug.
265 bool "Preemptible Kernel"
267 This option reduces the latency of the kernel when reacting to
268 real-time or interactive events by allowing a low priority process to
269 be preempted even if it is in kernel mode executing a system call.
270 This allows applications to run more reliably even when the system is
273 Say Y here if you are building a kernel for a desktop, embedded
274 or real-time system. Say N if you are unsure.
278 depends on (SMP || PREEMPT)
282 bool "Support for Linux/x86 binaries"
284 IA-64 processors can execute IA-32 (X86) instructions. By
285 saying Y here, the kernel will include IA-32 system call
286 emulation support which makes it possible to transparently
287 run IA-32 Linux binaries on an IA-64 Linux system.
292 depends on IA32_SUPPORT
295 config IA64_MCA_RECOVERY
296 tristate "MCA recovery from errors other than TLB."
299 bool "Performance monitor support"
301 Selects whether support for the IA-64 performance monitor hardware
302 is included in the kernel. This makes some kernel data-structures a
303 little bigger and slows down execution a bit, but it is generally
304 a good idea to turn this on. If you're unsure, say Y.
307 tristate "/proc/pal support"
309 If you say Y here, you are able to get PAL (Processor Abstraction
310 Layer) information in /proc/pal. This contains useful information
311 about the processors in your systems, such as cache and TLB sizes
312 and the PAL firmware version in use.
314 To use this option, you have to ensure that the "/proc file system
315 support" (CONFIG_PROC_FS) is enabled, too.
317 config ACPI_DEALLOCATE_IRQ
319 depends on IOSAPIC && EXPERIMENTAL
322 source "drivers/firmware/Kconfig"
324 source "fs/Kconfig.binfmt"
328 menu "Power management and ACPI"
331 bool "Power Management support"
332 depends on !IA64_HP_SIM
335 "Power Management" means that parts of your computer are shut
336 off or put into a power conserving "sleep" mode if they are not
337 being used. There are two competing standards for doing this: APM
338 and ACPI. If you want to use either one, say Y here and then also
339 to the requisite support below.
341 Power Management is most important for battery powered laptop
342 computers; if you have a laptop, check out the Linux Laptop home
343 page on the WWW at <http://www.linux-on-laptops.com/> and the
344 Battery Powered Linux mini-HOWTO, available from
345 <http://www.tldp.org/docs.html#howto>.
347 Note that, even if you say N here, Linux on the x86 architecture
348 will issue the hlt instruction if nothing is to be done, thereby
349 sending the processor to sleep and saving power.
353 depends on !IA64_HP_SIM
358 source "drivers/acpi/Kconfig"
366 menu "Bus options (PCI, PCMCIA)"
371 Find out whether you have a PCI motherboard. PCI is the name of a
372 bus system, i.e. the way the CPU talks to the other stuff inside
373 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
374 VESA. If you have PCI, say Y, otherwise N.
376 The PCI-HOWTO, available from
377 <http://www.tldp.org/docs.html#howto>, contains valuable
378 information about which PCI hardware does work under Linux and which
385 source "drivers/pci/Kconfig"
387 source "drivers/pci/hotplug/Kconfig"
389 source "drivers/pcmcia/Kconfig"
395 source "drivers/Kconfig"
402 # Use the generic interrupt handling code in kernel/irq/:
404 config GENERIC_HARDIRQS
408 config GENERIC_IRQ_PROBE
412 source "arch/ia64/hp/sim/Kconfig"
414 source "arch/ia64/oprofile/Kconfig"
416 source "arch/ia64/Kconfig.debug"
418 source "security/Kconfig"
420 source "crypto/Kconfig"