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_FIND_NEXT_BIT
41 config GENERIC_CALIBRATE_DELAY
45 config TIME_INTERPOLATION
61 config SCHED_NO_NO_OMIT_FRAME_POINTER
65 config IA64_UNCACHED_ALLOCATOR
67 select GENERIC_ALLOCATOR
84 This selects the system type of your hardware. A "generic" kernel
85 will run on any supported IA-64 system. However, if you configure
86 a kernel for your specific system, it will be faster and smaller.
88 generic For any supported IA-64 system
89 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
90 HP-zx1/sx1000 For HP systems
91 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
92 SGI-SN2 For SGI Altix systems
93 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
95 If you don't know what to do, choose "generic".
103 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
104 support for the HP I/O MMU.
106 config IA64_HP_ZX1_SWIOTLB
107 bool "HP-zx1/sx1000 with software I/O TLB"
109 Build a kernel that runs on HP zx1 and sx1000 systems even when they
110 have broken PCI devices which cannot DMA to full 32 bits. Apart
111 from support for the HP I/O MMU, this includes support for the software
112 I/O TLB, which allows supporting the broken devices at the expense of
113 wasting some kernel memory (about 2MB by default).
118 Selecting this option will optimize the kernel for use on sn2 based
119 systems, but the resulting kernel binary will not run on other
120 types of ia64 systems. If you have an SGI Altix system, it's safe
121 to select this option. If in doubt, select ia64 generic support
130 prompt "Processor type"
136 Select your IA-64 processor type. The default is Itanium.
137 This choice is safe for all IA-64 systems, but may not perform
138 optimally on systems with, say, Itanium 2 or newer processors.
143 Select this to configure for an Itanium 2 (McKinley) processor.
148 prompt "Kernel page size"
149 default IA64_PAGE_SIZE_16KB
151 config IA64_PAGE_SIZE_4KB
154 This lets you select the page size of the kernel. For best IA-64
155 performance, a page size of 8KB or 16KB is recommended. For best
156 IA-32 compatibility, a page size of 4KB should be selected (the vast
157 majority of IA-32 binaries work perfectly fine with a larger page
158 size). For Itanium 2 or newer systems, a page size of 64KB can also
161 4KB For best IA-32 compatibility
162 8KB For best IA-64 performance
163 16KB For best IA-64 performance
164 64KB Requires Itanium 2 or newer processor.
166 If you don't know what to do, choose 16KB.
168 config IA64_PAGE_SIZE_8KB
171 config IA64_PAGE_SIZE_16KB
174 config IA64_PAGE_SIZE_64KB
181 prompt "Page Table Levels"
188 depends on !IA64_PAGE_SIZE_64KB
193 source kernel/Kconfig.hz
200 # align cache-sensitive data to 128 bytes
201 config IA64_L1_CACHE_SHIFT
203 default "7" if MCKINLEY
204 default "6" if ITANIUM
207 bool "Cyclone (EXA) Time Source support"
209 Say Y here to enable support for IBM EXA Cyclone time source.
210 If you're unsure, answer N.
214 depends on !IA64_HP_SIM
217 config IA64_SGI_SN_XP
218 tristate "Support communication between SGI SSIs"
219 depends on IA64_GENERIC || IA64_SGI_SN2
220 select IA64_UNCACHED_ALLOCATOR
222 An SGI machine can be divided into multiple Single System
223 Images which act independently of each other and have
224 hardware based memory protection from the others. Enabling
225 this feature will allow for direct communication between SSIs
226 based on a network adapter and DMA messaging.
228 config FORCE_MAX_ZONEORDER
229 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
230 range 11 17 if !HUGETLB_PAGE
231 default "17" if HUGETLB_PAGE
235 bool "Symmetric multi-processing support"
237 This enables support for systems with more than one CPU. If you have
238 a system with only one CPU, say N. If you have a system with more
241 If you say N here, the kernel will run on single and multiprocessor
242 systems, but will use only one CPU of a multiprocessor system. If
243 you say Y here, the kernel will run on many, but not all,
244 single processor systems. On a single processor system, the kernel
245 will run faster if you say N here.
247 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
248 available at <http://www.tldp.org/docs.html#howto>.
250 If you don't know what to do here, say N.
253 int "Maximum number of CPUs (2-1024)"
258 You should set this to the number of CPUs in your system, but
259 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
260 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
261 than 64 will cause the use of a CPU mask array, causing a small
265 int "Maximum number of NODEs (256-1024)" if (IA64_SGI_SN2 || IA64_GENERIC)
267 depends on IA64_SGI_SN2 || IA64_GENERIC
270 This option specifies the maximum number of nodes in your SSI system.
271 If in doubt, use the default.
274 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
275 depends on SMP && EXPERIMENTAL
279 Say Y here to experiment with turning CPUs off and on. CPUs
280 can be controlled through /sys/devices/system/cpu/cpu#.
281 Say N if you want to disable CPU hotplug.
284 bool "SMT scheduler support"
288 Improves the CPU scheduler's decision making when dealing with
289 Intel IA64 chips with MultiThreading at a cost of slightly increased
290 overhead in some places. If unsure say N here.
292 config PERMIT_BSP_REMOVE
293 bool "Support removal of Bootstrap Processor"
294 depends on HOTPLUG_CPU
297 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
300 config FORCE_CPEI_RETARGET
301 bool "Force assumption that CPEI can be re-targetted"
302 depends on PERMIT_BSP_REMOVE
305 Say Y if you need to force the assumption that CPEI can be re-targetted to
306 any cpu in the system. This hint is available via ACPI 3.0 specifications.
307 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
308 This option it useful to enable this feature on older BIOS's as well.
309 You can also enable this by using boot command line option force_cpei=1.
312 bool "Preemptible Kernel"
314 This option reduces the latency of the kernel when reacting to
315 real-time or interactive events by allowing a low priority process to
316 be preempted even if it is in kernel mode executing a system call.
317 This allows applications to run more reliably even when the system is
320 Say Y here if you are building a kernel for a desktop, embedded
321 or real-time system. Say N if you are unsure.
325 config ARCH_SELECT_MEMORY_MODEL
328 config ARCH_DISCONTIGMEM_ENABLE
331 Say Y to support efficient handling of discontiguous physical memory,
332 for architectures which are either NUMA (Non-Uniform Memory Access)
333 or have huge holes in the physical address space for other reasons.
334 See <file:Documentation/vm/numa> for more.
336 config ARCH_FLATMEM_ENABLE
339 config ARCH_SPARSEMEM_ENABLE
341 depends on ARCH_DISCONTIGMEM_ENABLE
343 config ARCH_DISCONTIGMEM_DEFAULT
344 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
345 depends on ARCH_DISCONTIGMEM_ENABLE
349 depends on !IA64_HP_SIM && !FLATMEM
350 default y if IA64_SGI_SN2
352 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
353 Access). This option is for configuring high-end multiprocessor
354 server systems. If in doubt, say N.
356 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
357 # VIRTUAL_MEM_MAP has been retained for historical reasons.
358 config VIRTUAL_MEM_MAP
359 bool "Virtual mem map"
360 depends on !SPARSEMEM
361 default y if !IA64_HP_SIM
363 Say Y to compile the kernel with support for a virtual mem map.
364 This code also only takes effect if a memory hole of greater than
365 1 Gb is found during boot. You must turn this option on if you
366 require the DISCONTIGMEM option for your machine. If you are
371 default y if VIRTUAL_MEM_MAP
373 config HAVE_ARCH_EARLY_PFN_TO_NID
375 depends on NEED_MULTIPLE_NODES
378 bool "Support for Linux/x86 binaries"
380 IA-64 processors can execute IA-32 (X86) instructions. By
381 saying Y here, the kernel will include IA-32 system call
382 emulation support which makes it possible to transparently
383 run IA-32 Linux binaries on an IA-64 Linux system.
388 depends on IA32_SUPPORT
391 config IA64_MCA_RECOVERY
392 tristate "MCA recovery from errors other than TLB."
395 bool "Performance monitor support"
397 Selects whether support for the IA-64 performance monitor hardware
398 is included in the kernel. This makes some kernel data-structures a
399 little bigger and slows down execution a bit, but it is generally
400 a good idea to turn this on. If you're unsure, say Y.
403 tristate "/proc/pal support"
405 If you say Y here, you are able to get PAL (Processor Abstraction
406 Layer) information in /proc/pal. This contains useful information
407 about the processors in your systems, such as cache and TLB sizes
408 and the PAL firmware version in use.
410 To use this option, you have to ensure that the "/proc file system
411 support" (CONFIG_PROC_FS) is enabled, too.
414 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
416 source "drivers/firmware/Kconfig"
418 source "fs/Kconfig.binfmt"
422 menu "Power management and ACPI"
424 source "kernel/power/Kconfig"
426 source "drivers/acpi/Kconfig"
430 source "arch/ia64/kernel/cpufreq/Kconfig"
438 menu "Bus options (PCI, PCMCIA)"
443 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
444 here unless you are using a simulator without PCI support.
450 source "drivers/pci/Kconfig"
452 source "drivers/pci/hotplug/Kconfig"
454 source "drivers/pcmcia/Kconfig"
462 source "drivers/Kconfig"
469 # Use the generic interrupt handling code in kernel/irq/:
471 config GENERIC_HARDIRQS
475 config GENERIC_IRQ_PROBE
479 config GENERIC_PENDING_IRQ
481 depends on GENERIC_HARDIRQS && SMP
484 source "arch/ia64/hp/sim/Kconfig"
486 menu "Instrumentation Support"
487 depends on EXPERIMENTAL
489 source "arch/ia64/oprofile/Kconfig"
492 bool "Kprobes (EXPERIMENTAL)"
493 depends on EXPERIMENTAL && MODULES
495 Kprobes allows you to trap at almost any kernel address and
496 execute a callback function. register_kprobe() establishes
497 a probepoint and specifies the callback. Kprobes is useful
498 for kernel debugging, non-intrusive instrumentation and testing.
499 If in doubt, say "N".
502 source "arch/ia64/Kconfig.debug"
504 source "security/Kconfig"
506 source "crypto/Kconfig"