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 ARCH_HAS_ILOG2_U32
41 config ARCH_HAS_ILOG2_U64
45 config GENERIC_FIND_NEXT_BIT
49 config GENERIC_CALIBRATE_DELAY
53 config TIME_INTERPOLATION
69 config SCHED_NO_NO_OMIT_FRAME_POINTER
73 config IA64_UNCACHED_ALLOCATOR
75 select GENERIC_ALLOCATOR
92 This selects the system type of your hardware. A "generic" kernel
93 will run on any supported IA-64 system. However, if you configure
94 a kernel for your specific system, it will be faster and smaller.
96 generic For any supported IA-64 system
97 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
98 HP-zx1/sx1000 For HP systems
99 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
100 SGI-SN2 For SGI Altix systems
101 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
103 If you don't know what to do, choose "generic".
111 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
112 support for the HP I/O MMU.
114 config IA64_HP_ZX1_SWIOTLB
115 bool "HP-zx1/sx1000 with software I/O TLB"
117 Build a kernel that runs on HP zx1 and sx1000 systems even when they
118 have broken PCI devices which cannot DMA to full 32 bits. Apart
119 from support for the HP I/O MMU, this includes support for the software
120 I/O TLB, which allows supporting the broken devices at the expense of
121 wasting some kernel memory (about 2MB by default).
126 Selecting this option will optimize the kernel for use on sn2 based
127 systems, but the resulting kernel binary will not run on other
128 types of ia64 systems. If you have an SGI Altix system, it's safe
129 to select this option. If in doubt, select ia64 generic support
138 prompt "Processor type"
144 Select your IA-64 processor type. The default is Itanium.
145 This choice is safe for all IA-64 systems, but may not perform
146 optimally on systems with, say, Itanium 2 or newer processors.
151 Select this to configure for an Itanium 2 (McKinley) processor.
156 prompt "Kernel page size"
157 default IA64_PAGE_SIZE_16KB
159 config IA64_PAGE_SIZE_4KB
162 This lets you select the page size of the kernel. For best IA-64
163 performance, a page size of 8KB or 16KB is recommended. For best
164 IA-32 compatibility, a page size of 4KB should be selected (the vast
165 majority of IA-32 binaries work perfectly fine with a larger page
166 size). For Itanium 2 or newer systems, a page size of 64KB can also
169 4KB For best IA-32 compatibility
170 8KB For best IA-64 performance
171 16KB For best IA-64 performance
172 64KB Requires Itanium 2 or newer processor.
174 If you don't know what to do, choose 16KB.
176 config IA64_PAGE_SIZE_8KB
179 config IA64_PAGE_SIZE_16KB
182 config IA64_PAGE_SIZE_64KB
189 prompt "Page Table Levels"
196 depends on !IA64_PAGE_SIZE_64KB
201 source kernel/Kconfig.hz
208 # align cache-sensitive data to 128 bytes
209 config IA64_L1_CACHE_SHIFT
211 default "7" if MCKINLEY
212 default "6" if ITANIUM
215 bool "Cyclone (EXA) Time Source support"
217 Say Y here to enable support for IBM EXA Cyclone time source.
218 If you're unsure, answer N.
222 depends on !IA64_HP_SIM
225 config IA64_SGI_SN_XP
226 tristate "Support communication between SGI SSIs"
227 depends on IA64_GENERIC || IA64_SGI_SN2
228 select IA64_UNCACHED_ALLOCATOR
230 An SGI machine can be divided into multiple Single System
231 Images which act independently of each other and have
232 hardware based memory protection from the others. Enabling
233 this feature will allow for direct communication between SSIs
234 based on a network adapter and DMA messaging.
236 config FORCE_MAX_ZONEORDER
237 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
238 range 11 17 if !HUGETLB_PAGE
239 default "17" if HUGETLB_PAGE
243 bool "Symmetric multi-processing support"
245 This enables support for systems with more than one CPU. If you have
246 a system with only one CPU, say N. If you have a system with more
249 If you say N here, the kernel will run on single and multiprocessor
250 systems, but will use only one CPU of a multiprocessor system. If
251 you say Y here, the kernel will run on many, but not all,
252 single processor systems. On a single processor system, the kernel
253 will run faster if you say N here.
255 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
256 available at <http://www.tldp.org/docs.html#howto>.
258 If you don't know what to do here, say N.
261 int "Maximum number of CPUs (2-1024)"
266 You should set this to the number of CPUs in your system, but
267 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
268 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
269 than 64 will cause the use of a CPU mask array, causing a small
273 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
274 depends on SMP && EXPERIMENTAL
278 Say Y here to experiment with turning CPUs off and on. CPUs
279 can be controlled through /sys/devices/system/cpu/cpu#.
280 Say N if you want to disable CPU hotplug.
282 config ARCH_ENABLE_MEMORY_HOTPLUG
286 bool "SMT scheduler support"
289 Improves the CPU scheduler's decision making when dealing with
290 Intel IA64 chips with MultiThreading at a cost of slightly increased
291 overhead in some places. If unsure say N here.
293 config PERMIT_BSP_REMOVE
294 bool "Support removal of Bootstrap Processor"
295 depends on HOTPLUG_CPU
298 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
301 config FORCE_CPEI_RETARGET
302 bool "Force assumption that CPEI can be re-targetted"
303 depends on PERMIT_BSP_REMOVE
306 Say Y if you need to force the assumption that CPEI can be re-targetted to
307 any cpu in the system. This hint is available via ACPI 3.0 specifications.
308 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
309 This option it useful to enable this feature on older BIOS's as well.
310 You can also enable this by using boot command line option force_cpei=1.
313 bool "Preemptible Kernel"
315 This option reduces the latency of the kernel when reacting to
316 real-time or interactive events by allowing a low priority process to
317 be preempted even if it is in kernel mode executing a system call.
318 This allows applications to run more reliably even when the system is
321 Say Y here if you are building a kernel for a desktop, embedded
322 or real-time system. Say N if you are unsure.
326 config ARCH_SELECT_MEMORY_MODEL
329 config ARCH_DISCONTIGMEM_ENABLE
332 Say Y to support efficient handling of discontiguous physical memory,
333 for architectures which are either NUMA (Non-Uniform Memory Access)
334 or have huge holes in the physical address space for other reasons.
335 See <file:Documentation/vm/numa> for more.
337 config ARCH_FLATMEM_ENABLE
340 config ARCH_SPARSEMEM_ENABLE
342 depends on ARCH_DISCONTIGMEM_ENABLE
344 config ARCH_DISCONTIGMEM_DEFAULT
345 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
346 depends on ARCH_DISCONTIGMEM_ENABLE
350 depends on !IA64_HP_SIM && !FLATMEM
351 default y if IA64_SGI_SN2
352 select ACPI_NUMA if ACPI
354 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
355 Access). This option is for configuring high-end multiprocessor
356 server systems. If in doubt, say N.
359 int "Max num nodes shift(3-10)"
362 depends on NEED_MULTIPLE_NODES
364 This option specifies the maximum number of nodes in your SSI system.
365 MAX_NUMNODES will be 2^(This value).
366 If in doubt, use the default.
368 config ARCH_POPULATES_NODE_MAP
371 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
372 # VIRTUAL_MEM_MAP has been retained for historical reasons.
373 config VIRTUAL_MEM_MAP
374 bool "Virtual mem map"
375 depends on !SPARSEMEM
376 default y if !IA64_HP_SIM
378 Say Y to compile the kernel with support for a virtual mem map.
379 This code also only takes effect if a memory hole of greater than
380 1 Gb is found during boot. You must turn this option on if you
381 require the DISCONTIGMEM option for your machine. If you are
386 default y if VIRTUAL_MEM_MAP
388 config HAVE_ARCH_EARLY_PFN_TO_NID
390 depends on NEED_MULTIPLE_NODES
392 config HAVE_ARCH_NODEDATA_EXTENSION
397 bool "Support for Linux/x86 binaries"
399 IA-64 processors can execute IA-32 (X86) instructions. By
400 saying Y here, the kernel will include IA-32 system call
401 emulation support which makes it possible to transparently
402 run IA-32 Linux binaries on an IA-64 Linux system.
407 depends on IA32_SUPPORT
410 config IA64_MCA_RECOVERY
411 tristate "MCA recovery from errors other than TLB."
414 bool "Performance monitor support"
416 Selects whether support for the IA-64 performance monitor hardware
417 is included in the kernel. This makes some kernel data-structures a
418 little bigger and slows down execution a bit, but it is generally
419 a good idea to turn this on. If you're unsure, say Y.
422 tristate "/proc/pal support"
424 If you say Y here, you are able to get PAL (Processor Abstraction
425 Layer) information in /proc/pal. This contains useful information
426 about the processors in your systems, such as cache and TLB sizes
427 and the PAL firmware version in use.
429 To use this option, you have to ensure that the "/proc file system
430 support" (CONFIG_PROC_FS) is enabled, too.
433 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
436 bool "ESI (Extensible SAL Interface) support"
438 If you say Y here, support is built into the kernel to
439 make ESI calls. ESI calls are used to support vendor-specific
440 firmware extensions, such as the ability to inject memory-errors
441 for test-purposes. If you're unsure, say N.
443 source "drivers/sn/Kconfig"
446 bool "kexec system call (EXPERIMENTAL)"
447 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
449 kexec is a system call that implements the ability to shutdown your
450 current kernel, and to start another kernel. It is like a reboot
451 but it is indepedent of the system firmware. And like a reboot
452 you can start any kernel with it, not just Linux.
454 The name comes from the similiarity to the exec system call.
456 It is an ongoing process to be certain the hardware in a machine
457 is properly shutdown, so do not be surprised if this code does not
458 initially work for you. It may help to enable device hotplugging
459 support. As of this writing the exact hardware interface is
460 strongly in flux, so no good recommendation can be made.
463 bool "kernel crash dumps (EXPERIMENTAL)"
464 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
466 Generate crash dump after being started by kexec.
468 source "drivers/firmware/Kconfig"
470 source "fs/Kconfig.binfmt"
474 menu "Power management and ACPI"
476 source "kernel/power/Kconfig"
478 source "drivers/acpi/Kconfig"
482 source "arch/ia64/kernel/cpufreq/Kconfig"
490 menu "Bus options (PCI, PCMCIA)"
495 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
496 here unless you are using a simulator without PCI support.
502 source "drivers/pci/pcie/Kconfig"
504 source "drivers/pci/Kconfig"
506 source "drivers/pci/hotplug/Kconfig"
508 source "drivers/pcmcia/Kconfig"
516 source "drivers/Kconfig"
519 tristate "Memory special operations driver"
521 select IA64_UNCACHED_ALLOCATOR
523 If you have an ia64 and you want to enable memory special
524 operations support (formerly known as fetchop), say Y here,
532 # Use the generic interrupt handling code in kernel/irq/:
534 config GENERIC_HARDIRQS
538 config GENERIC_IRQ_PROBE
542 config GENERIC_PENDING_IRQ
544 depends on GENERIC_HARDIRQS && SMP
551 source "arch/ia64/hp/sim/Kconfig"
553 menu "Instrumentation Support"
554 depends on EXPERIMENTAL
556 source "arch/ia64/oprofile/Kconfig"
559 bool "Kprobes (EXPERIMENTAL)"
560 depends on KALLSYMS && EXPERIMENTAL && MODULES
562 Kprobes allows you to trap at almost any kernel address and
563 execute a callback function. register_kprobe() establishes
564 a probepoint and specifies the callback. Kprobes is useful
565 for kernel debugging, non-intrusive instrumentation and testing.
566 If in doubt, say "N".
569 source "arch/ia64/Kconfig.debug"
571 source "security/Kconfig"
573 source "crypto/Kconfig"