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
83 This selects the system type of your hardware. A "generic" kernel
84 will run on any supported IA-64 system. However, if you configure
85 a kernel for your specific system, it will be faster and smaller.
87 generic For any supported IA-64 system
88 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
89 HP-zx1/sx1000 For HP systems
90 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
91 SGI-SN2 For SGI Altix systems
92 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
94 If you don't know what to do, choose "generic".
102 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
103 support for the HP I/O MMU.
105 config IA64_HP_ZX1_SWIOTLB
106 bool "HP-zx1/sx1000 with software I/O TLB"
108 Build a kernel that runs on HP zx1 and sx1000 systems even when they
109 have broken PCI devices which cannot DMA to full 32 bits. Apart
110 from support for the HP I/O MMU, this includes support for the software
111 I/O TLB, which allows supporting the broken devices at the expense of
112 wasting some kernel memory (about 2MB by default).
117 Selecting this option will optimize the kernel for use on sn2 based
118 systems, but the resulting kernel binary will not run on other
119 types of ia64 systems. If you have an SGI Altix system, it's safe
120 to select this option. If in doubt, select ia64 generic support
129 prompt "Processor type"
135 Select your IA-64 processor type. The default is Itanium.
136 This choice is safe for all IA-64 systems, but may not perform
137 optimally on systems with, say, Itanium 2 or newer processors.
142 Select this to configure for an Itanium 2 (McKinley) processor.
147 prompt "Kernel page size"
148 default IA64_PAGE_SIZE_16KB
150 config IA64_PAGE_SIZE_4KB
153 This lets you select the page size of the kernel. For best IA-64
154 performance, a page size of 8KB or 16KB is recommended. For best
155 IA-32 compatibility, a page size of 4KB should be selected (the vast
156 majority of IA-32 binaries work perfectly fine with a larger page
157 size). For Itanium 2 or newer systems, a page size of 64KB can also
160 4KB For best IA-32 compatibility
161 8KB For best IA-64 performance
162 16KB For best IA-64 performance
163 64KB Requires Itanium 2 or newer processor.
165 If you don't know what to do, choose 16KB.
167 config IA64_PAGE_SIZE_8KB
170 config IA64_PAGE_SIZE_16KB
173 config IA64_PAGE_SIZE_64KB
180 prompt "Page Table Levels"
187 depends on !IA64_PAGE_SIZE_64KB
192 source kernel/Kconfig.hz
199 # align cache-sensitive data to 128 bytes
200 config IA64_L1_CACHE_SHIFT
202 default "7" if MCKINLEY
203 default "6" if ITANIUM
206 bool "Cyclone (EXA) Time Source support"
208 Say Y here to enable support for IBM EXA Cyclone time source.
209 If you're unsure, answer N.
213 depends on !IA64_HP_SIM
216 config IA64_SGI_SN_XP
217 tristate "Support communication between SGI SSIs"
218 depends on IA64_GENERIC || IA64_SGI_SN2
219 select IA64_UNCACHED_ALLOCATOR
221 An SGI machine can be divided into multiple Single System
222 Images which act independently of each other and have
223 hardware based memory protection from the others. Enabling
224 this feature will allow for direct communication between SSIs
225 based on a network adapter and DMA messaging.
227 config FORCE_MAX_ZONEORDER
228 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
229 range 11 17 if !HUGETLB_PAGE
230 default "17" if HUGETLB_PAGE
234 bool "Symmetric multi-processing support"
236 This enables support for systems with more than one CPU. If you have
237 a system with only one CPU, say N. If you have a system with more
240 If you say N here, the kernel will run on single and multiprocessor
241 systems, but will use only one CPU of a multiprocessor system. If
242 you say Y here, the kernel will run on many, but not all,
243 single processor systems. On a single processor system, the kernel
244 will run faster if you say N here.
246 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
247 available at <http://www.tldp.org/docs.html#howto>.
249 If you don't know what to do here, say N.
252 int "Maximum number of CPUs (2-1024)"
257 You should set this to the number of CPUs in your system, but
258 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
259 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
260 than 64 will cause the use of a CPU mask array, causing a small
264 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
265 depends on SMP && EXPERIMENTAL
269 Say Y here to experiment with turning CPUs off and on. CPUs
270 can be controlled through /sys/devices/system/cpu/cpu#.
271 Say N if you want to disable CPU hotplug.
274 bool "SMT scheduler support"
278 Improves the CPU scheduler's decision making when dealing with
279 Intel IA64 chips with MultiThreading at a cost of slightly increased
280 overhead in some places. If unsure say N here.
282 config PERMIT_BSP_REMOVE
283 bool "Support removal of Bootstrap Processor"
284 depends on HOTPLUG_CPU
287 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
290 config FORCE_CPEI_RETARGET
291 bool "Force assumption that CPEI can be re-targetted"
292 depends on PERMIT_BSP_REMOVE
295 Say Y if you need to force the assumption that CPEI can be re-targetted to
296 any cpu in the system. This hint is available via ACPI 3.0 specifications.
297 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
298 This option it useful to enable this feature on older BIOS's as well.
299 You can also enable this by using boot command line option force_cpei=1.
302 bool "Preemptible Kernel"
304 This option reduces the latency of the kernel when reacting to
305 real-time or interactive events by allowing a low priority process to
306 be preempted even if it is in kernel mode executing a system call.
307 This allows applications to run more reliably even when the system is
310 Say Y here if you are building a kernel for a desktop, embedded
311 or real-time system. Say N if you are unsure.
315 config ARCH_SELECT_MEMORY_MODEL
318 config ARCH_DISCONTIGMEM_ENABLE
321 Say Y to support efficient handling of discontiguous physical memory,
322 for architectures which are either NUMA (Non-Uniform Memory Access)
323 or have huge holes in the physical address space for other reasons.
324 See <file:Documentation/vm/numa> for more.
326 config ARCH_FLATMEM_ENABLE
329 config ARCH_SPARSEMEM_ENABLE
331 depends on ARCH_DISCONTIGMEM_ENABLE
333 config ARCH_DISCONTIGMEM_DEFAULT
334 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
335 depends on ARCH_DISCONTIGMEM_ENABLE
339 depends on !IA64_HP_SIM && !FLATMEM
340 default y if IA64_SGI_SN2
342 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
343 Access). This option is for configuring high-end multiprocessor
344 server systems. If in doubt, say N.
347 int "Max num nodes shift(3-10)"
350 depends on NEED_MULTIPLE_NODES
352 This option specifies the maximum number of nodes in your SSI system.
353 MAX_NUMNODES will be 2^(This value).
354 If in doubt, use the default.
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/sn/Kconfig"
418 source "drivers/firmware/Kconfig"
420 source "fs/Kconfig.binfmt"
424 menu "Power management and ACPI"
426 source "kernel/power/Kconfig"
428 source "drivers/acpi/Kconfig"
432 source "arch/ia64/kernel/cpufreq/Kconfig"
440 menu "Bus options (PCI, PCMCIA)"
445 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
446 here unless you are using a simulator without PCI support.
452 source "drivers/pci/Kconfig"
454 source "drivers/pci/hotplug/Kconfig"
456 source "drivers/pcmcia/Kconfig"
464 source "drivers/Kconfig"
471 # Use the generic interrupt handling code in kernel/irq/:
473 config GENERIC_HARDIRQS
477 config GENERIC_IRQ_PROBE
481 config GENERIC_PENDING_IRQ
483 depends on GENERIC_HARDIRQS && SMP
486 source "arch/ia64/hp/sim/Kconfig"
488 menu "Instrumentation Support"
489 depends on EXPERIMENTAL
491 source "arch/ia64/oprofile/Kconfig"
494 bool "Kprobes (EXPERIMENTAL)"
495 depends on EXPERIMENTAL && MODULES
497 Kprobes allows you to trap at almost any kernel address and
498 execute a callback function. register_kprobe() establishes
499 a probepoint and specifies the callback. Kprobes is useful
500 for kernel debugging, non-intrusive instrumentation and testing.
501 If in doubt, say "N".
504 source "arch/ia64/Kconfig.debug"
506 source "security/Kconfig"
508 source "crypto/Kconfig"