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
75 This selects the system type of your hardware. A "generic" kernel
76 will run on any supported IA-64 system. However, if you configure
77 a kernel for your specific system, it will be faster and smaller.
79 generic For any supported IA-64 system
80 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
81 HP-zx1/sx1000 For HP systems
82 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
83 SGI-SN2 For SGI Altix systems
84 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
86 If you don't know what to do, choose "generic".
94 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
95 support for the HP I/O MMU.
97 config IA64_HP_ZX1_SWIOTLB
98 bool "HP-zx1/sx1000 with software I/O TLB"
100 Build a kernel that runs on HP zx1 and sx1000 systems even when they
101 have broken PCI devices which cannot DMA to full 32 bits. Apart
102 from support for the HP I/O MMU, this includes support for the software
103 I/O TLB, which allows supporting the broken devices at the expense of
104 wasting some kernel memory (about 2MB by default).
109 Selecting this option will optimize the kernel for use on sn2 based
110 systems, but the resulting kernel binary will not run on other
111 types of ia64 systems. If you have an SGI Altix system, it's safe
112 to select this option. If in doubt, select ia64 generic support
121 prompt "Processor type"
127 Select your IA-64 processor type. The default is Itanium.
128 This choice is safe for all IA-64 systems, but may not perform
129 optimally on systems with, say, Itanium 2 or newer processors.
134 Select this to configure for an Itanium 2 (McKinley) processor.
139 prompt "Kernel page size"
140 default IA64_PAGE_SIZE_16KB
142 config IA64_PAGE_SIZE_4KB
145 This lets you select the page size of the kernel. For best IA-64
146 performance, a page size of 8KB or 16KB is recommended. For best
147 IA-32 compatibility, a page size of 4KB should be selected (the vast
148 majority of IA-32 binaries work perfectly fine with a larger page
149 size). For Itanium 2 or newer systems, a page size of 64KB can also
152 4KB For best IA-32 compatibility
153 8KB For best IA-64 performance
154 16KB For best IA-64 performance
155 64KB Requires Itanium 2 or newer processor.
157 If you don't know what to do, choose 16KB.
159 config IA64_PAGE_SIZE_8KB
162 config IA64_PAGE_SIZE_16KB
165 config IA64_PAGE_SIZE_64KB
172 prompt "Page Table Levels"
179 depends on !IA64_PAGE_SIZE_64KB
184 source kernel/Kconfig.hz
191 # align cache-sensitive data to 128 bytes
192 config IA64_L1_CACHE_SHIFT
194 default "7" if MCKINLEY
195 default "6" if ITANIUM
198 bool "Cyclone (EXA) Time Source support"
200 Say Y here to enable support for IBM EXA Cyclone time source.
201 If you're unsure, answer N.
205 depends on !IA64_HP_SIM
208 config IA64_SGI_SN_XP
209 tristate "Support communication between SGI SSIs"
210 depends on IA64_GENERIC || IA64_SGI_SN2
211 select IA64_UNCACHED_ALLOCATOR
213 An SGI machine can be divided into multiple Single System
214 Images which act independently of each other and have
215 hardware based memory protection from the others. Enabling
216 this feature will allow for direct communication between SSIs
217 based on a network adapter and DMA messaging.
219 config FORCE_MAX_ZONEORDER
220 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
221 range 11 17 if !HUGETLB_PAGE
222 default "17" if HUGETLB_PAGE
226 bool "Symmetric multi-processing support"
228 This enables support for systems with more than one CPU. If you have
229 a system with only one CPU, say N. If you have a system with more
232 If you say N here, the kernel will run on single and multiprocessor
233 systems, but will use only one CPU of a multiprocessor system. If
234 you say Y here, the kernel will run on many, but not all,
235 single processor systems. On a single processor system, the kernel
236 will run faster if you say N here.
238 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
239 available at <http://www.tldp.org/docs.html#howto>.
241 If you don't know what to do here, say N.
244 int "Maximum number of CPUs (2-1024)"
249 You should set this to the number of CPUs in your system, but
250 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
251 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
252 than 64 will cause the use of a CPU mask array, causing a small
256 int "Maximum number of NODEs (256-1024)" if (IA64_SGI_SN2 || IA64_GENERIC)
258 depends on IA64_SGI_SN2 || IA64_GENERIC
261 This option specifies the maximum number of nodes in your SSI system.
262 If in doubt, use the default.
265 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
266 depends on SMP && EXPERIMENTAL
270 Say Y here to experiment with turning CPUs off and on. CPUs
271 can be controlled through /sys/devices/system/cpu/cpu#.
272 Say N if you want to disable CPU hotplug.
275 bool "SMT scheduler support"
279 Improves the CPU scheduler's decision making when dealing with
280 Intel IA64 chips with MultiThreading at a cost of slightly increased
281 overhead in some places. If unsure say N here.
283 config PERMIT_BSP_REMOVE
284 bool "Support removal of Bootstrap Processor"
285 depends on HOTPLUG_CPU
288 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
291 config FORCE_CPEI_RETARGET
292 bool "Force assumption that CPEI can be re-targetted"
293 depends on PERMIT_BSP_REMOVE
296 Say Y if you need to force the assumption that CPEI can be re-targetted to
297 any cpu in the system. This hint is available via ACPI 3.0 specifications.
298 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
299 This option it useful to enable this feature on older BIOS's as well.
300 You can also enable this by using boot command line option force_cpei=1.
303 bool "Preemptible Kernel"
305 This option reduces the latency of the kernel when reacting to
306 real-time or interactive events by allowing a low priority process to
307 be preempted even if it is in kernel mode executing a system call.
308 This allows applications to run more reliably even when the system is
311 Say Y here if you are building a kernel for a desktop, embedded
312 or real-time system. Say N if you are unsure.
316 config ARCH_SELECT_MEMORY_MODEL
319 config ARCH_DISCONTIGMEM_ENABLE
322 Say Y to support efficient handling of discontiguous physical memory,
323 for architectures which are either NUMA (Non-Uniform Memory Access)
324 or have huge holes in the physical address space for other reasons.
325 See <file:Documentation/vm/numa> for more.
327 config ARCH_FLATMEM_ENABLE
330 config ARCH_SPARSEMEM_ENABLE
332 depends on ARCH_DISCONTIGMEM_ENABLE
334 config ARCH_DISCONTIGMEM_DEFAULT
335 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
336 depends on ARCH_DISCONTIGMEM_ENABLE
340 depends on !IA64_HP_SIM && !FLATMEM
341 default y if IA64_SGI_SN2
343 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
344 Access). This option is for configuring high-end multiprocessor
345 server systems. If in doubt, say N.
347 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
348 # VIRTUAL_MEM_MAP has been retained for historical reasons.
349 config VIRTUAL_MEM_MAP
350 bool "Virtual mem map"
351 depends on !SPARSEMEM
352 default y if !IA64_HP_SIM
354 Say Y to compile the kernel with support for a virtual mem map.
355 This code also only takes effect if a memory hole of greater than
356 1 Gb is found during boot. You must turn this option on if you
357 require the DISCONTIGMEM option for your machine. If you are
362 default y if VIRTUAL_MEM_MAP
364 config HAVE_ARCH_EARLY_PFN_TO_NID
366 depends on NEED_MULTIPLE_NODES
369 bool "Support for Linux/x86 binaries"
371 IA-64 processors can execute IA-32 (X86) instructions. By
372 saying Y here, the kernel will include IA-32 system call
373 emulation support which makes it possible to transparently
374 run IA-32 Linux binaries on an IA-64 Linux system.
379 depends on IA32_SUPPORT
382 config IA64_MCA_RECOVERY
383 tristate "MCA recovery from errors other than TLB."
386 bool "Performance monitor support"
388 Selects whether support for the IA-64 performance monitor hardware
389 is included in the kernel. This makes some kernel data-structures a
390 little bigger and slows down execution a bit, but it is generally
391 a good idea to turn this on. If you're unsure, say Y.
394 tristate "/proc/pal support"
396 If you say Y here, you are able to get PAL (Processor Abstraction
397 Layer) information in /proc/pal. This contains useful information
398 about the processors in your systems, such as cache and TLB sizes
399 and the PAL firmware version in use.
401 To use this option, you have to ensure that the "/proc file system
402 support" (CONFIG_PROC_FS) is enabled, too.
405 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
407 source "drivers/firmware/Kconfig"
409 source "fs/Kconfig.binfmt"
413 menu "Power management and ACPI"
415 source "kernel/power/Kconfig"
417 source "drivers/acpi/Kconfig"
421 source "arch/ia64/kernel/cpufreq/Kconfig"
429 menu "Bus options (PCI, PCMCIA)"
434 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
435 here unless you are using a simulator without PCI support.
441 source "drivers/pci/Kconfig"
443 source "drivers/pci/hotplug/Kconfig"
445 source "drivers/pcmcia/Kconfig"
453 source "drivers/Kconfig"
460 # Use the generic interrupt handling code in kernel/irq/:
462 config GENERIC_HARDIRQS
466 config GENERIC_IRQ_PROBE
470 config GENERIC_PENDING_IRQ
472 depends on GENERIC_HARDIRQS && SMP
475 source "arch/ia64/hp/sim/Kconfig"
477 menu "Instrumentation Support"
478 depends on EXPERIMENTAL
480 source "arch/ia64/oprofile/Kconfig"
483 bool "Kprobes (EXPERIMENTAL)"
484 depends on EXPERIMENTAL && MODULES
486 Kprobes allows you to trap at almost any kernel address and
487 execute a callback function. register_kprobe() establishes
488 a probepoint and specifies the callback. Kprobes is useful
489 for kernel debugging, non-intrusive instrumentation and testing.
490 If in doubt, say "N".
493 source "arch/ia64/Kconfig.debug"
495 source "security/Kconfig"
497 source "crypto/Kconfig"