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 PCI if (!IA64_HP_SIM)
15 select ACPI if (!IA64_HP_SIM)
18 The Itanium Processor Family is Intel's 64-bit successor to
19 the 32-bit X86 line. The IA-64 Linux project has a home
20 page at <http://www.linuxia64.org/> and a mailing list at
21 <linux-ia64@vger.kernel.org>.
29 depends on !IA64_SGI_SN2
38 config RWSEM_XCHGADD_ALGORITHM
42 config ARCH_HAS_ILOG2_U32
46 config ARCH_HAS_ILOG2_U64
50 config GENERIC_FIND_NEXT_BIT
54 config GENERIC_CALIBRATE_DELAY
58 config TIME_INTERPOLATION
74 config SCHED_NO_NO_OMIT_FRAME_POINTER
78 config IA64_UNCACHED_ALLOCATOR
80 select GENERIC_ALLOCATOR
96 This selects the system type of your hardware. A "generic" kernel
97 will run on any supported IA-64 system. However, if you configure
98 a kernel for your specific system, it will be faster and smaller.
100 generic For any supported IA-64 system
101 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
102 HP-zx1/sx1000 For HP systems
103 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
104 SGI-SN2 For SGI Altix systems
105 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
107 If you don't know what to do, choose "generic".
116 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
117 support for the HP I/O MMU.
119 config IA64_HP_ZX1_SWIOTLB
120 bool "HP-zx1/sx1000 with software I/O TLB"
123 Build a kernel that runs on HP zx1 and sx1000 systems even when they
124 have broken PCI devices which cannot DMA to full 32 bits. Apart
125 from support for the HP I/O MMU, this includes support for the software
126 I/O TLB, which allows supporting the broken devices at the expense of
127 wasting some kernel memory (about 2MB by default).
132 Selecting this option will optimize the kernel for use on sn2 based
133 systems, but the resulting kernel binary will not run on other
134 types of ia64 systems. If you have an SGI Altix system, it's safe
135 to select this option. If in doubt, select ia64 generic support
145 prompt "Processor type"
151 Select your IA-64 processor type. The default is Itanium.
152 This choice is safe for all IA-64 systems, but may not perform
153 optimally on systems with, say, Itanium 2 or newer processors.
158 Select this to configure for an Itanium 2 (McKinley) processor.
163 prompt "Kernel page size"
164 default IA64_PAGE_SIZE_16KB
166 config IA64_PAGE_SIZE_4KB
169 This lets you select the page size of the kernel. For best IA-64
170 performance, a page size of 8KB or 16KB is recommended. For best
171 IA-32 compatibility, a page size of 4KB should be selected (the vast
172 majority of IA-32 binaries work perfectly fine with a larger page
173 size). For Itanium 2 or newer systems, a page size of 64KB can also
176 4KB For best IA-32 compatibility
177 8KB For best IA-64 performance
178 16KB For best IA-64 performance
179 64KB Requires Itanium 2 or newer processor.
181 If you don't know what to do, choose 16KB.
183 config IA64_PAGE_SIZE_8KB
186 config IA64_PAGE_SIZE_16KB
189 config IA64_PAGE_SIZE_64KB
196 prompt "Page Table Levels"
203 depends on !IA64_PAGE_SIZE_64KB
208 source kernel/Kconfig.hz
215 # align cache-sensitive data to 128 bytes
216 config IA64_L1_CACHE_SHIFT
218 default "7" if MCKINLEY
219 default "6" if ITANIUM
222 bool "Cyclone (EXA) Time Source support"
224 Say Y here to enable support for IBM EXA Cyclone time source.
225 If you're unsure, answer N.
229 depends on !IA64_HP_SIM
232 config IA64_SGI_SN_XP
233 tristate "Support communication between SGI SSIs"
234 depends on IA64_GENERIC || IA64_SGI_SN2
235 select IA64_UNCACHED_ALLOCATOR
237 An SGI machine can be divided into multiple Single System
238 Images which act independently of each other and have
239 hardware based memory protection from the others. Enabling
240 this feature will allow for direct communication between SSIs
241 based on a network adapter and DMA messaging.
243 config FORCE_MAX_ZONEORDER
244 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
245 range 11 17 if !HUGETLB_PAGE
246 default "17" if HUGETLB_PAGE
250 bool "Symmetric multi-processing support"
252 This enables support for systems with more than one CPU. If you have
253 a system with only one CPU, say N. If you have a system with more
256 If you say N here, the kernel will run on single and multiprocessor
257 systems, but will use only one CPU of a multiprocessor system. If
258 you say Y here, the kernel will run on many, but not all,
259 single processor systems. On a single processor system, the kernel
260 will run faster if you say N here.
262 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
263 available at <http://www.tldp.org/docs.html#howto>.
265 If you don't know what to do here, say N.
268 int "Maximum number of CPUs (2-1024)"
273 You should set this to the number of CPUs in your system, but
274 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
275 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
276 than 64 will cause the use of a CPU mask array, causing a small
280 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
281 depends on SMP && EXPERIMENTAL
285 Say Y here to experiment with turning CPUs off and on. CPUs
286 can be controlled through /sys/devices/system/cpu/cpu#.
287 Say N if you want to disable CPU hotplug.
289 config ARCH_ENABLE_MEMORY_HOTPLUG
293 bool "SMT scheduler support"
296 Improves the CPU scheduler's decision making when dealing with
297 Intel IA64 chips with MultiThreading at a cost of slightly increased
298 overhead in some places. If unsure say N here.
300 config PERMIT_BSP_REMOVE
301 bool "Support removal of Bootstrap Processor"
302 depends on HOTPLUG_CPU
305 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
308 config FORCE_CPEI_RETARGET
309 bool "Force assumption that CPEI can be re-targetted"
310 depends on PERMIT_BSP_REMOVE
313 Say Y if you need to force the assumption that CPEI can be re-targetted to
314 any cpu in the system. This hint is available via ACPI 3.0 specifications.
315 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
316 This option it useful to enable this feature on older BIOS's as well.
317 You can also enable this by using boot command line option force_cpei=1.
320 bool "Preemptible Kernel"
322 This option reduces the latency of the kernel when reacting to
323 real-time or interactive events by allowing a low priority process to
324 be preempted even if it is in kernel mode executing a system call.
325 This allows applications to run more reliably even when the system is
328 Say Y here if you are building a kernel for a desktop, embedded
329 or real-time system. Say N if you are unsure.
333 config ARCH_SELECT_MEMORY_MODEL
336 config ARCH_DISCONTIGMEM_ENABLE
339 Say Y to support efficient handling of discontiguous physical memory,
340 for architectures which are either NUMA (Non-Uniform Memory Access)
341 or have huge holes in the physical address space for other reasons.
342 See <file:Documentation/vm/numa> for more.
344 config ARCH_FLATMEM_ENABLE
347 config ARCH_SPARSEMEM_ENABLE
349 depends on ARCH_DISCONTIGMEM_ENABLE
351 config ARCH_DISCONTIGMEM_DEFAULT
352 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
353 depends on ARCH_DISCONTIGMEM_ENABLE
357 depends on !IA64_HP_SIM && !FLATMEM
358 default y if IA64_SGI_SN2
359 select ACPI_NUMA if ACPI
361 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
362 Access). This option is for configuring high-end multiprocessor
363 server systems. If in doubt, say N.
366 int "Max num nodes shift(3-10)"
369 depends on NEED_MULTIPLE_NODES
371 This option specifies the maximum number of nodes in your SSI system.
372 MAX_NUMNODES will be 2^(This value).
373 If in doubt, use the default.
375 config ARCH_POPULATES_NODE_MAP
378 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
379 # VIRTUAL_MEM_MAP has been retained for historical reasons.
380 config VIRTUAL_MEM_MAP
381 bool "Virtual mem map"
382 depends on !SPARSEMEM
383 default y if !IA64_HP_SIM
385 Say Y to compile the kernel with support for a virtual mem map.
386 This code also only takes effect if a memory hole of greater than
387 1 Gb is found during boot. You must turn this option on if you
388 require the DISCONTIGMEM option for your machine. If you are
393 default y if VIRTUAL_MEM_MAP
395 config HAVE_ARCH_EARLY_PFN_TO_NID
397 depends on NEED_MULTIPLE_NODES
399 config HAVE_ARCH_NODEDATA_EXTENSION
404 bool "Support for Linux/x86 binaries"
406 IA-64 processors can execute IA-32 (X86) instructions. By
407 saying Y here, the kernel will include IA-32 system call
408 emulation support which makes it possible to transparently
409 run IA-32 Linux binaries on an IA-64 Linux system.
414 depends on IA32_SUPPORT
417 config IA64_MCA_RECOVERY
418 tristate "MCA recovery from errors other than TLB."
421 bool "Performance monitor support"
423 Selects whether support for the IA-64 performance monitor hardware
424 is included in the kernel. This makes some kernel data-structures a
425 little bigger and slows down execution a bit, but it is generally
426 a good idea to turn this on. If you're unsure, say Y.
429 tristate "/proc/pal support"
431 If you say Y here, you are able to get PAL (Processor Abstraction
432 Layer) information in /proc/pal. This contains useful information
433 about the processors in your systems, such as cache and TLB sizes
434 and the PAL firmware version in use.
436 To use this option, you have to ensure that the "/proc file system
437 support" (CONFIG_PROC_FS) is enabled, too.
440 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
443 bool "ESI (Extensible SAL Interface) support"
445 If you say Y here, support is built into the kernel to
446 make ESI calls. ESI calls are used to support vendor-specific
447 firmware extensions, such as the ability to inject memory-errors
448 for test-purposes. If you're unsure, say N.
450 source "drivers/sn/Kconfig"
453 bool "kexec system call (EXPERIMENTAL)"
454 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
456 kexec is a system call that implements the ability to shutdown your
457 current kernel, and to start another kernel. It is like a reboot
458 but it is indepedent of the system firmware. And like a reboot
459 you can start any kernel with it, not just Linux.
461 The name comes from the similiarity to the exec system call.
463 It is an ongoing process to be certain the hardware in a machine
464 is properly shutdown, so do not be surprised if this code does not
465 initially work for you. It may help to enable device hotplugging
466 support. As of this writing the exact hardware interface is
467 strongly in flux, so no good recommendation can be made.
470 bool "kernel crash dumps (EXPERIMENTAL)"
471 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
473 Generate crash dump after being started by kexec.
475 source "drivers/firmware/Kconfig"
477 source "fs/Kconfig.binfmt"
481 menu "Power management and ACPI"
483 source "kernel/power/Kconfig"
485 source "drivers/acpi/Kconfig"
489 source "arch/ia64/kernel/cpufreq/Kconfig"
497 menu "Bus options (PCI, PCMCIA)"
502 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
503 here unless you are using a simulator without PCI support.
509 source "drivers/pci/pcie/Kconfig"
511 source "drivers/pci/Kconfig"
513 source "drivers/pci/hotplug/Kconfig"
515 source "drivers/pcmcia/Kconfig"
523 source "drivers/Kconfig"
526 tristate "Memory special operations driver"
528 select IA64_UNCACHED_ALLOCATOR
530 If you have an ia64 and you want to enable memory special
531 operations support (formerly known as fetchop), say Y here,
539 # Use the generic interrupt handling code in kernel/irq/:
541 config GENERIC_HARDIRQS
545 config GENERIC_IRQ_PROBE
549 config GENERIC_PENDING_IRQ
551 depends on GENERIC_HARDIRQS && SMP
558 source "arch/ia64/hp/sim/Kconfig"
560 menu "Instrumentation Support"
561 depends on EXPERIMENTAL
563 source "arch/ia64/oprofile/Kconfig"
566 bool "Kprobes (EXPERIMENTAL)"
567 depends on KALLSYMS && EXPERIMENTAL && MODULES
569 Kprobes allows you to trap at almost any kernel address and
570 execute a callback function. register_kprobe() establishes
571 a probepoint and specifies the callback. Kprobes is useful
572 for kernel debugging, non-intrusive instrumentation and testing.
573 If in doubt, say "N".
576 source "arch/ia64/Kconfig.debug"
578 source "security/Kconfig"
580 source "crypto/Kconfig"