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_XP
224 tristate "Support communication between SGI SSIs"
225 select IA64_UNCACHED_ALLOCATOR
227 An SGI machine can be divided into multiple Single System
228 Images which act independently of each other and have
229 hardware based memory protection from the others. Enabling
230 this feature will allow for direct communication between SSIs
231 based on a network adapter and DMA messaging.
233 config FORCE_MAX_ZONEORDER
238 bool "Symmetric multi-processing support"
240 This enables support for systems with more than one CPU. If you have
241 a system with only one CPU, say N. If you have a system with more
244 If you say N here, the kernel will run on single and multiprocessor
245 systems, but will use only one CPU of a multiprocessor system. If
246 you say Y here, the kernel will run on many, but not all,
247 single processor systems. On a single processor system, the kernel
248 will run faster if you say N here.
250 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
251 available at <http://www.tldp.org/docs.html#howto>.
253 If you don't know what to do here, say N.
256 int "Maximum number of CPUs (2-512)"
261 You should set this to the number of CPUs in your system, but
262 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
263 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
264 than 64 will cause the use of a CPU mask array, causing a small
268 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
269 depends on SMP && EXPERIMENTAL
273 Say Y here to experiment with turning CPUs off and on. CPUs
274 can be controlled through /sys/devices/system/cpu/cpu#.
275 Say N if you want to disable CPU hotplug.
278 bool "SMT scheduler support"
282 Improves the CPU scheduler's decision making when dealing with
283 Intel IA64 chips with MultiThreading at a cost of slightly increased
284 overhead in some places. If unsure say N here.
287 bool "Preemptible Kernel"
289 This option reduces the latency of the kernel when reacting to
290 real-time or interactive events by allowing a low priority process to
291 be preempted even if it is in kernel mode executing a system call.
292 This allows applications to run more reliably even when the system is
295 Say Y here if you are building a kernel for a desktop, embedded
296 or real-time system. Say N if you are unsure.
302 depends on (SMP || PREEMPT)
306 bool "Support for Linux/x86 binaries"
308 IA-64 processors can execute IA-32 (X86) instructions. By
309 saying Y here, the kernel will include IA-32 system call
310 emulation support which makes it possible to transparently
311 run IA-32 Linux binaries on an IA-64 Linux system.
316 depends on IA32_SUPPORT
319 config IA64_MCA_RECOVERY
320 tristate "MCA recovery from errors other than TLB."
323 bool "Performance monitor support"
325 Selects whether support for the IA-64 performance monitor hardware
326 is included in the kernel. This makes some kernel data-structures a
327 little bigger and slows down execution a bit, but it is generally
328 a good idea to turn this on. If you're unsure, say Y.
331 tristate "/proc/pal support"
333 If you say Y here, you are able to get PAL (Processor Abstraction
334 Layer) information in /proc/pal. This contains useful information
335 about the processors in your systems, such as cache and TLB sizes
336 and the PAL firmware version in use.
338 To use this option, you have to ensure that the "/proc file system
339 support" (CONFIG_PROC_FS) is enabled, too.
341 config ACPI_DEALLOCATE_IRQ
343 depends on IOSAPIC && EXPERIMENTAL
346 source "drivers/firmware/Kconfig"
348 source "fs/Kconfig.binfmt"
352 menu "Power management and ACPI"
355 bool "Power Management support"
356 depends on !IA64_HP_SIM
359 "Power Management" means that parts of your computer are shut
360 off or put into a power conserving "sleep" mode if they are not
361 being used. There are two competing standards for doing this: APM
362 and ACPI. If you want to use either one, say Y here and then also
363 to the requisite support below.
365 Power Management is most important for battery powered laptop
366 computers; if you have a laptop, check out the Linux Laptop home
367 page on the WWW at <http://www.linux-on-laptops.com/> and the
368 Battery Powered Linux mini-HOWTO, available from
369 <http://www.tldp.org/docs.html#howto>.
371 Note that, even if you say N here, Linux on the x86 architecture
372 will issue the hlt instruction if nothing is to be done, thereby
373 sending the processor to sleep and saving power.
377 depends on !IA64_HP_SIM
382 source "drivers/acpi/Kconfig"
390 menu "Bus options (PCI, PCMCIA)"
395 Find out whether you have a PCI motherboard. PCI is the name of a
396 bus system, i.e. the way the CPU talks to the other stuff inside
397 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
398 VESA. If you have PCI, say Y, otherwise N.
400 The PCI-HOWTO, available from
401 <http://www.tldp.org/docs.html#howto>, contains valuable
402 information about which PCI hardware does work under Linux and which
409 source "drivers/pci/Kconfig"
411 source "drivers/pci/hotplug/Kconfig"
413 source "drivers/pcmcia/Kconfig"
421 source "drivers/Kconfig"
428 # Use the generic interrupt handling code in kernel/irq/:
430 config GENERIC_HARDIRQS
434 config GENERIC_IRQ_PROBE
438 source "arch/ia64/hp/sim/Kconfig"
440 source "arch/ia64/oprofile/Kconfig"
442 source "arch/ia64/Kconfig.debug"
444 source "security/Kconfig"
446 source "crypto/Kconfig"