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"
14 select ATA_NONSTANDARD if ATA
17 The Itanium Processor Family is Intel's 64-bit successor to
18 the 32-bit X86 line. The IA-64 Linux project has a home
19 page at <http://www.linuxia64.org/> and a mailing list at
20 <linux-ia64@vger.kernel.org>.
34 config RWSEM_XCHGADD_ALGORITHM
38 config ARCH_HAS_ILOG2_U32
42 config ARCH_HAS_ILOG2_U64
46 config GENERIC_FIND_NEXT_BIT
50 config GENERIC_CALIBRATE_DELAY
54 config TIME_INTERPOLATION
70 config SCHED_NO_NO_OMIT_FRAME_POINTER
74 config IA64_UNCACHED_ALLOCATOR
76 select GENERIC_ALLOCATOR
93 This selects the system type of your hardware. A "generic" kernel
94 will run on any supported IA-64 system. However, if you configure
95 a kernel for your specific system, it will be faster and smaller.
97 generic For any supported IA-64 system
98 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
99 HP-zx1/sx1000 For HP systems
100 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
101 SGI-SN2 For SGI Altix systems
102 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
104 If you don't know what to do, choose "generic".
112 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
113 support for the HP I/O MMU.
115 config IA64_HP_ZX1_SWIOTLB
116 bool "HP-zx1/sx1000 with software I/O TLB"
118 Build a kernel that runs on HP zx1 and sx1000 systems even when they
119 have broken PCI devices which cannot DMA to full 32 bits. Apart
120 from support for the HP I/O MMU, this includes support for the software
121 I/O TLB, which allows supporting the broken devices at the expense of
122 wasting some kernel memory (about 2MB by default).
127 Selecting this option will optimize the kernel for use on sn2 based
128 systems, but the resulting kernel binary will not run on other
129 types of ia64 systems. If you have an SGI Altix system, it's safe
130 to select this option. If in doubt, select ia64 generic support
139 prompt "Processor type"
145 Select your IA-64 processor type. The default is Itanium.
146 This choice is safe for all IA-64 systems, but may not perform
147 optimally on systems with, say, Itanium 2 or newer processors.
152 Select this to configure for an Itanium 2 (McKinley) processor.
157 prompt "Kernel page size"
158 default IA64_PAGE_SIZE_16KB
160 config IA64_PAGE_SIZE_4KB
163 This lets you select the page size of the kernel. For best IA-64
164 performance, a page size of 8KB or 16KB is recommended. For best
165 IA-32 compatibility, a page size of 4KB should be selected (the vast
166 majority of IA-32 binaries work perfectly fine with a larger page
167 size). For Itanium 2 or newer systems, a page size of 64KB can also
170 4KB For best IA-32 compatibility
171 8KB For best IA-64 performance
172 16KB For best IA-64 performance
173 64KB Requires Itanium 2 or newer processor.
175 If you don't know what to do, choose 16KB.
177 config IA64_PAGE_SIZE_8KB
180 config IA64_PAGE_SIZE_16KB
183 config IA64_PAGE_SIZE_64KB
190 prompt "Page Table Levels"
197 depends on !IA64_PAGE_SIZE_64KB
202 source kernel/Kconfig.hz
209 # align cache-sensitive data to 128 bytes
210 config IA64_L1_CACHE_SHIFT
212 default "7" if MCKINLEY
213 default "6" if ITANIUM
216 bool "Cyclone (EXA) Time Source support"
218 Say Y here to enable support for IBM EXA Cyclone time source.
219 If you're unsure, answer N.
223 depends on !IA64_HP_SIM
226 config IA64_SGI_SN_XP
227 tristate "Support communication between SGI SSIs"
228 depends on IA64_GENERIC || IA64_SGI_SN2
229 select IA64_UNCACHED_ALLOCATOR
231 An SGI machine can be divided into multiple Single System
232 Images which act independently of each other and have
233 hardware based memory protection from the others. Enabling
234 this feature will allow for direct communication between SSIs
235 based on a network adapter and DMA messaging.
237 config FORCE_MAX_ZONEORDER
238 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
239 range 11 17 if !HUGETLB_PAGE
240 default "17" if HUGETLB_PAGE
244 bool "Symmetric multi-processing support"
246 This enables support for systems with more than one CPU. If you have
247 a system with only one CPU, say N. If you have a system with more
250 If you say N here, the kernel will run on single and multiprocessor
251 systems, but will use only one CPU of a multiprocessor system. If
252 you say Y here, the kernel will run on many, but not all,
253 single processor systems. On a single processor system, the kernel
254 will run faster if you say N here.
256 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
257 available at <http://www.tldp.org/docs.html#howto>.
259 If you don't know what to do here, say N.
262 int "Maximum number of CPUs (2-1024)"
267 You should set this to the number of CPUs in your system, but
268 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
269 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
270 than 64 will cause the use of a CPU mask array, causing a small
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.
283 config ARCH_ENABLE_MEMORY_HOTPLUG
287 bool "SMT scheduler support"
290 Improves the CPU scheduler's decision making when dealing with
291 Intel IA64 chips with MultiThreading at a cost of slightly increased
292 overhead in some places. If unsure say N here.
294 config PERMIT_BSP_REMOVE
295 bool "Support removal of Bootstrap Processor"
296 depends on HOTPLUG_CPU
299 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
302 config FORCE_CPEI_RETARGET
303 bool "Force assumption that CPEI can be re-targetted"
304 depends on PERMIT_BSP_REMOVE
307 Say Y if you need to force the assumption that CPEI can be re-targetted to
308 any cpu in the system. This hint is available via ACPI 3.0 specifications.
309 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
310 This option it useful to enable this feature on older BIOS's as well.
311 You can also enable this by using boot command line option force_cpei=1.
314 bool "Preemptible Kernel"
316 This option reduces the latency of the kernel when reacting to
317 real-time or interactive events by allowing a low priority process to
318 be preempted even if it is in kernel mode executing a system call.
319 This allows applications to run more reliably even when the system is
322 Say Y here if you are building a kernel for a desktop, embedded
323 or real-time system. Say N if you are unsure.
327 config ARCH_SELECT_MEMORY_MODEL
330 config ARCH_DISCONTIGMEM_ENABLE
333 Say Y to support efficient handling of discontiguous physical memory,
334 for architectures which are either NUMA (Non-Uniform Memory Access)
335 or have huge holes in the physical address space for other reasons.
336 See <file:Documentation/vm/numa> for more.
338 config ARCH_FLATMEM_ENABLE
341 config ARCH_SPARSEMEM_ENABLE
343 depends on ARCH_DISCONTIGMEM_ENABLE
345 config ARCH_DISCONTIGMEM_DEFAULT
346 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
347 depends on ARCH_DISCONTIGMEM_ENABLE
351 depends on !IA64_HP_SIM && !FLATMEM
352 default y if IA64_SGI_SN2
353 select ACPI_NUMA if ACPI
355 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
356 Access). This option is for configuring high-end multiprocessor
357 server systems. If in doubt, say N.
360 int "Max num nodes shift(3-10)"
363 depends on NEED_MULTIPLE_NODES
365 This option specifies the maximum number of nodes in your SSI system.
366 MAX_NUMNODES will be 2^(This value).
367 If in doubt, use the default.
369 config ARCH_POPULATES_NODE_MAP
372 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
373 # VIRTUAL_MEM_MAP has been retained for historical reasons.
374 config VIRTUAL_MEM_MAP
375 bool "Virtual mem map"
376 depends on !SPARSEMEM
377 default y if !IA64_HP_SIM
379 Say Y to compile the kernel with support for a virtual mem map.
380 This code also only takes effect if a memory hole of greater than
381 1 Gb is found during boot. You must turn this option on if you
382 require the DISCONTIGMEM option for your machine. If you are
387 default y if VIRTUAL_MEM_MAP
389 config HAVE_ARCH_EARLY_PFN_TO_NID
391 depends on NEED_MULTIPLE_NODES
393 config HAVE_ARCH_NODEDATA_EXTENSION
398 bool "Support for Linux/x86 binaries"
400 IA-64 processors can execute IA-32 (X86) instructions. By
401 saying Y here, the kernel will include IA-32 system call
402 emulation support which makes it possible to transparently
403 run IA-32 Linux binaries on an IA-64 Linux system.
408 depends on IA32_SUPPORT
411 config IA64_MCA_RECOVERY
412 tristate "MCA recovery from errors other than TLB."
415 bool "Performance monitor support"
417 Selects whether support for the IA-64 performance monitor hardware
418 is included in the kernel. This makes some kernel data-structures a
419 little bigger and slows down execution a bit, but it is generally
420 a good idea to turn this on. If you're unsure, say Y.
423 tristate "/proc/pal support"
425 If you say Y here, you are able to get PAL (Processor Abstraction
426 Layer) information in /proc/pal. This contains useful information
427 about the processors in your systems, such as cache and TLB sizes
428 and the PAL firmware version in use.
430 To use this option, you have to ensure that the "/proc file system
431 support" (CONFIG_PROC_FS) is enabled, too.
434 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
437 bool "ESI (Extensible SAL Interface) support"
439 If you say Y here, support is built into the kernel to
440 make ESI calls. ESI calls are used to support vendor-specific
441 firmware extensions, such as the ability to inject memory-errors
442 for test-purposes. If you're unsure, say N.
444 source "drivers/sn/Kconfig"
447 bool "kexec system call (EXPERIMENTAL)"
448 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
450 kexec is a system call that implements the ability to shutdown your
451 current kernel, and to start another kernel. It is like a reboot
452 but it is indepedent of the system firmware. And like a reboot
453 you can start any kernel with it, not just Linux.
455 The name comes from the similiarity to the exec system call.
457 It is an ongoing process to be certain the hardware in a machine
458 is properly shutdown, so do not be surprised if this code does not
459 initially work for you. It may help to enable device hotplugging
460 support. As of this writing the exact hardware interface is
461 strongly in flux, so no good recommendation can be made.
464 bool "kernel crash dumps (EXPERIMENTAL)"
465 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
467 Generate crash dump after being started by kexec.
469 source "drivers/firmware/Kconfig"
471 source "fs/Kconfig.binfmt"
475 menu "Power management and ACPI"
477 source "kernel/power/Kconfig"
479 source "drivers/acpi/Kconfig"
483 source "arch/ia64/kernel/cpufreq/Kconfig"
491 menu "Bus options (PCI, PCMCIA)"
496 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
497 here unless you are using a simulator without PCI support.
503 source "drivers/pci/pcie/Kconfig"
505 source "drivers/pci/Kconfig"
507 source "drivers/pci/hotplug/Kconfig"
509 source "drivers/pcmcia/Kconfig"
517 source "drivers/Kconfig"
520 tristate "Memory special operations driver"
522 select IA64_UNCACHED_ALLOCATOR
524 If you have an ia64 and you want to enable memory special
525 operations support (formerly known as fetchop), say Y here,
533 # Use the generic interrupt handling code in kernel/irq/:
535 config GENERIC_HARDIRQS
539 config GENERIC_IRQ_PROBE
543 config GENERIC_PENDING_IRQ
545 depends on GENERIC_HARDIRQS && SMP
552 source "arch/ia64/hp/sim/Kconfig"
554 menu "Instrumentation Support"
555 depends on EXPERIMENTAL
557 source "arch/ia64/oprofile/Kconfig"
560 bool "Kprobes (EXPERIMENTAL)"
561 depends on KALLSYMS && EXPERIMENTAL && MODULES
563 Kprobes allows you to trap at almost any kernel address and
564 execute a callback function. register_kprobe() establishes
565 a probepoint and specifies the callback. Kprobes is useful
566 for kernel debugging, non-intrusive instrumentation and testing.
567 If in doubt, say "N".
570 source "arch/ia64/Kconfig.debug"
572 source "security/Kconfig"
574 source "crypto/Kconfig"