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>.
33 config RWSEM_XCHGADD_ALGORITHM
37 config GENERIC_CALIBRATE_DELAY
41 config TIME_INTERPOLATION
53 config SCHED_NO_NO_OMIT_FRAME_POINTER
57 config IA64_UNCACHED_ALLOCATOR
59 select GENERIC_ALLOCATOR
71 This selects the system type of your hardware. A "generic" kernel
72 will run on any supported IA-64 system. However, if you configure
73 a kernel for your specific system, it will be faster and smaller.
75 generic For any supported IA-64 system
76 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
77 HP-zx1/sx1000 For HP systems
78 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
79 SGI-SN2 For SGI Altix systems
80 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
82 If you don't know what to do, choose "generic".
90 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
91 support for the HP I/O MMU.
93 config IA64_HP_ZX1_SWIOTLB
94 bool "HP-zx1/sx1000 with software I/O TLB"
96 Build a kernel that runs on HP zx1 and sx1000 systems even when they
97 have broken PCI devices which cannot DMA to full 32 bits. Apart
98 from support for the HP I/O MMU, this includes support for the software
99 I/O TLB, which allows supporting the broken devices at the expense of
100 wasting some kernel memory (about 2MB by default).
105 Selecting this option will optimize the kernel for use on sn2 based
106 systems, but the resulting kernel binary will not run on other
107 types of ia64 systems. If you have an SGI Altix system, it's safe
108 to select this option. If in doubt, select ia64 generic support
117 prompt "Processor type"
123 Select your IA-64 processor type. The default is Itanium.
124 This choice is safe for all IA-64 systems, but may not perform
125 optimally on systems with, say, Itanium 2 or newer processors.
130 Select this to configure for an Itanium 2 (McKinley) processor.
135 prompt "Kernel page size"
136 default IA64_PAGE_SIZE_16KB
138 config IA64_PAGE_SIZE_4KB
141 This lets you select the page size of the kernel. For best IA-64
142 performance, a page size of 8KB or 16KB is recommended. For best
143 IA-32 compatibility, a page size of 4KB should be selected (the vast
144 majority of IA-32 binaries work perfectly fine with a larger page
145 size). For Itanium 2 or newer systems, a page size of 64KB can also
148 4KB For best IA-32 compatibility
149 8KB For best IA-64 performance
150 16KB For best IA-64 performance
151 64KB Requires Itanium 2 or newer processor.
153 If you don't know what to do, choose 16KB.
155 config IA64_PAGE_SIZE_8KB
158 config IA64_PAGE_SIZE_16KB
161 config IA64_PAGE_SIZE_64KB
167 source kernel/Kconfig.hz
174 # align cache-sensitive data to 128 bytes
175 config IA64_L1_CACHE_SHIFT
177 default "7" if MCKINLEY
178 default "6" if ITANIUM
180 # align cache-sensitive data to 64 bytes
182 bool "Cyclone (EXA) Time Source support"
184 Say Y here to enable support for IBM EXA Cyclone time source.
185 If you're unsure, answer N.
189 depends on !IA64_HP_SIM
192 config IA64_SGI_SN_XP
193 tristate "Support communication between SGI SSIs"
194 select IA64_UNCACHED_ALLOCATOR
196 An SGI machine can be divided into multiple Single System
197 Images which act independently of each other and have
198 hardware based memory protection from the others. Enabling
199 this feature will allow for direct communication between SSIs
200 based on a network adapter and DMA messaging.
202 config FORCE_MAX_ZONEORDER
203 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
204 range 11 17 if !HUGETLB_PAGE
205 default "17" if HUGETLB_PAGE
209 bool "Symmetric multi-processing support"
211 This enables support for systems with more than one CPU. If you have
212 a system with only one CPU, say N. If you have a system with more
215 If you say N here, the kernel will run on single and multiprocessor
216 systems, but will use only one CPU of a multiprocessor system. If
217 you say Y here, the kernel will run on many, but not all,
218 single processor systems. On a single processor system, the kernel
219 will run faster if you say N here.
221 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
222 available at <http://www.tldp.org/docs.html#howto>.
224 If you don't know what to do here, say N.
227 int "Maximum number of CPUs (2-1024)"
232 You should set this to the number of CPUs in your system, but
233 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
234 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
235 than 64 will cause the use of a CPU mask array, causing a small
239 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
240 depends on SMP && EXPERIMENTAL
244 Say Y here to experiment with turning CPUs off and on. CPUs
245 can be controlled through /sys/devices/system/cpu/cpu#.
246 Say N if you want to disable CPU hotplug.
249 bool "SMT scheduler support"
253 Improves the CPU scheduler's decision making when dealing with
254 Intel IA64 chips with MultiThreading at a cost of slightly increased
255 overhead in some places. If unsure say N here.
258 bool "Preemptible Kernel"
260 This option reduces the latency of the kernel when reacting to
261 real-time or interactive events by allowing a low priority process to
262 be preempted even if it is in kernel mode executing a system call.
263 This allows applications to run more reliably even when the system is
266 Say Y here if you are building a kernel for a desktop, embedded
267 or real-time system. Say N if you are unsure.
271 config ARCH_SELECT_MEMORY_MODEL
274 config ARCH_DISCONTIGMEM_ENABLE
277 Say Y to support efficient handling of discontiguous physical memory,
278 for architectures which are either NUMA (Non-Uniform Memory Access)
279 or have huge holes in the physical address space for other reasons.
280 See <file:Documentation/vm/numa> for more.
282 config ARCH_FLATMEM_ENABLE
285 config ARCH_SPARSEMEM_ENABLE
287 depends on ARCH_DISCONTIGMEM_ENABLE
289 config ARCH_DISCONTIGMEM_DEFAULT
290 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
291 depends on ARCH_DISCONTIGMEM_ENABLE
295 depends on !IA64_HP_SIM && !FLATMEM
296 default y if IA64_SGI_SN2
298 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
299 Access). This option is for configuring high-end multiprocessor
300 server systems. If in doubt, say N.
302 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
303 # VIRTUAL_MEM_MAP has been retained for historical reasons.
304 config VIRTUAL_MEM_MAP
305 bool "Virtual mem map"
306 depends on !SPARSEMEM
307 default y if !IA64_HP_SIM
309 Say Y to compile the kernel with support for a virtual mem map.
310 This code also only takes effect if a memory hole of greater than
311 1 Gb is found during boot. You must turn this option on if you
312 require the DISCONTIGMEM option for your machine. If you are
317 default y if VIRTUAL_MEM_MAP
319 config HAVE_ARCH_EARLY_PFN_TO_NID
321 depends on NEED_MULTIPLE_NODES
324 bool "Support for Linux/x86 binaries"
326 IA-64 processors can execute IA-32 (X86) instructions. By
327 saying Y here, the kernel will include IA-32 system call
328 emulation support which makes it possible to transparently
329 run IA-32 Linux binaries on an IA-64 Linux system.
334 depends on IA32_SUPPORT
337 config IA64_MCA_RECOVERY
338 tristate "MCA recovery from errors other than TLB."
341 bool "Performance monitor support"
343 Selects whether support for the IA-64 performance monitor hardware
344 is included in the kernel. This makes some kernel data-structures a
345 little bigger and slows down execution a bit, but it is generally
346 a good idea to turn this on. If you're unsure, say Y.
349 tristate "/proc/pal support"
351 If you say Y here, you are able to get PAL (Processor Abstraction
352 Layer) information in /proc/pal. This contains useful information
353 about the processors in your systems, such as cache and TLB sizes
354 and the PAL firmware version in use.
356 To use this option, you have to ensure that the "/proc file system
357 support" (CONFIG_PROC_FS) is enabled, too.
359 source "drivers/firmware/Kconfig"
361 source "fs/Kconfig.binfmt"
365 menu "Power management and ACPI"
367 source "kernel/power/Kconfig"
369 source "drivers/acpi/Kconfig"
373 source "arch/ia64/kernel/cpufreq/Kconfig"
381 menu "Bus options (PCI, PCMCIA)"
386 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
387 here unless you are using a simulator without PCI support.
393 source "drivers/pci/Kconfig"
395 source "drivers/pci/hotplug/Kconfig"
397 source "drivers/pcmcia/Kconfig"
405 source "drivers/Kconfig"
412 # Use the generic interrupt handling code in kernel/irq/:
414 config GENERIC_HARDIRQS
418 config GENERIC_IRQ_PROBE
422 config GENERIC_PENDING_IRQ
424 depends on GENERIC_HARDIRQS && SMP
427 source "arch/ia64/hp/sim/Kconfig"
429 source "arch/ia64/oprofile/Kconfig"
431 source "arch/ia64/Kconfig.debug"
433 source "security/Kconfig"
435 source "crypto/Kconfig"