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)
16 select PM if (!IA64_HP_SIM)
17 select ARCH_SUPPORTS_MSI
20 The Itanium Processor Family is Intel's 64-bit successor to
21 the 32-bit X86 line. The IA-64 Linux project has a home
22 page at <http://www.linuxia64.org/> and a mailing list at
23 <linux-ia64@vger.kernel.org>.
27 select ATA_NONSTANDARD if ATA
32 depends on !IA64_SGI_SN2
41 config RWSEM_XCHGADD_ALGORITHM
45 config ARCH_HAS_ILOG2_U32
49 config ARCH_HAS_ILOG2_U64
53 config GENERIC_FIND_NEXT_BIT
57 config GENERIC_CALIBRATE_DELAY
61 config TIME_INTERPOLATION
77 config SCHED_NO_NO_OMIT_FRAME_POINTER
81 config IA64_UNCACHED_ALLOCATOR
83 select GENERIC_ALLOCATOR
99 This selects the system type of your hardware. A "generic" kernel
100 will run on any supported IA-64 system. However, if you configure
101 a kernel for your specific system, it will be faster and smaller.
103 generic For any supported IA-64 system
104 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
105 HP-zx1/sx1000 For HP systems
106 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
107 SGI-SN2 For SGI Altix systems
108 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
110 If you don't know what to do, choose "generic".
119 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
120 support for the HP I/O MMU.
122 config IA64_HP_ZX1_SWIOTLB
123 bool "HP-zx1/sx1000 with software I/O TLB"
126 Build a kernel that runs on HP zx1 and sx1000 systems even when they
127 have broken PCI devices which cannot DMA to full 32 bits. Apart
128 from support for the HP I/O MMU, this includes support for the software
129 I/O TLB, which allows supporting the broken devices at the expense of
130 wasting some kernel memory (about 2MB by default).
135 Selecting this option will optimize the kernel for use on sn2 based
136 systems, but the resulting kernel binary will not run on other
137 types of ia64 systems. If you have an SGI Altix system, it's safe
138 to select this option. If in doubt, select ia64 generic support
148 prompt "Processor type"
154 Select your IA-64 processor type. The default is Itanium.
155 This choice is safe for all IA-64 systems, but may not perform
156 optimally on systems with, say, Itanium 2 or newer processors.
161 Select this to configure for an Itanium 2 (McKinley) processor.
166 prompt "Kernel page size"
167 default IA64_PAGE_SIZE_16KB
169 config IA64_PAGE_SIZE_4KB
172 This lets you select the page size of the kernel. For best IA-64
173 performance, a page size of 8KB or 16KB is recommended. For best
174 IA-32 compatibility, a page size of 4KB should be selected (the vast
175 majority of IA-32 binaries work perfectly fine with a larger page
176 size). For Itanium 2 or newer systems, a page size of 64KB can also
179 4KB For best IA-32 compatibility
180 8KB For best IA-64 performance
181 16KB For best IA-64 performance
182 64KB Requires Itanium 2 or newer processor.
184 If you don't know what to do, choose 16KB.
186 config IA64_PAGE_SIZE_8KB
189 config IA64_PAGE_SIZE_16KB
192 config IA64_PAGE_SIZE_64KB
199 prompt "Page Table Levels"
206 depends on !IA64_PAGE_SIZE_64KB
211 source kernel/Kconfig.hz
218 # align cache-sensitive data to 128 bytes
219 config IA64_L1_CACHE_SHIFT
221 default "7" if MCKINLEY
222 default "6" if ITANIUM
225 bool "Cyclone (EXA) Time Source support"
227 Say Y here to enable support for IBM EXA Cyclone time source.
228 If you're unsure, answer N.
232 depends on !IA64_HP_SIM
235 config IA64_SGI_SN_XP
236 tristate "Support communication between SGI SSIs"
237 depends on IA64_GENERIC || IA64_SGI_SN2
238 select IA64_UNCACHED_ALLOCATOR
240 An SGI machine can be divided into multiple Single System
241 Images which act independently of each other and have
242 hardware based memory protection from the others. Enabling
243 this feature will allow for direct communication between SSIs
244 based on a network adapter and DMA messaging.
246 config FORCE_MAX_ZONEORDER
247 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
248 range 11 17 if !HUGETLB_PAGE
249 default "17" if HUGETLB_PAGE
253 bool "Symmetric multi-processing support"
255 This enables support for systems with more than one CPU. If you have
256 a system with only one CPU, say N. If you have a system with more
259 If you say N here, the kernel will run on single and multiprocessor
260 systems, but will use only one CPU of a multiprocessor system. If
261 you say Y here, the kernel will run on many, but not all,
262 single processor systems. On a single processor system, the kernel
263 will run faster if you say N here.
265 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
266 available at <http://www.tldp.org/docs.html#howto>.
268 If you don't know what to do here, say N.
271 int "Maximum number of CPUs (2-1024)"
276 You should set this to the number of CPUs in your system, but
277 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
278 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
279 than 64 will cause the use of a CPU mask array, causing a small
283 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
284 depends on SMP && EXPERIMENTAL
288 Say Y here to experiment with turning CPUs off and on. CPUs
289 can be controlled through /sys/devices/system/cpu/cpu#.
290 Say N if you want to disable CPU hotplug.
292 config ARCH_ENABLE_MEMORY_HOTPLUG
296 bool "SMT scheduler support"
299 Improves the CPU scheduler's decision making when dealing with
300 Intel IA64 chips with MultiThreading at a cost of slightly increased
301 overhead in some places. If unsure say N here.
303 config PERMIT_BSP_REMOVE
304 bool "Support removal of Bootstrap Processor"
305 depends on HOTPLUG_CPU
308 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
311 config FORCE_CPEI_RETARGET
312 bool "Force assumption that CPEI can be re-targetted"
313 depends on PERMIT_BSP_REMOVE
316 Say Y if you need to force the assumption that CPEI can be re-targetted to
317 any cpu in the system. This hint is available via ACPI 3.0 specifications.
318 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
319 This option it useful to enable this feature on older BIOS's as well.
320 You can also enable this by using boot command line option force_cpei=1.
323 bool "Preemptible Kernel"
325 This option reduces the latency of the kernel when reacting to
326 real-time or interactive events by allowing a low priority process to
327 be preempted even if it is in kernel mode executing a system call.
328 This allows applications to run more reliably even when the system is
331 Say Y here if you are building a kernel for a desktop, embedded
332 or real-time system. Say N if you are unsure.
336 config ARCH_SELECT_MEMORY_MODEL
339 config ARCH_DISCONTIGMEM_ENABLE
342 Say Y to support efficient handling of discontiguous physical memory,
343 for architectures which are either NUMA (Non-Uniform Memory Access)
344 or have huge holes in the physical address space for other reasons.
345 See <file:Documentation/vm/numa> for more.
347 config ARCH_FLATMEM_ENABLE
350 config ARCH_SPARSEMEM_ENABLE
352 depends on ARCH_DISCONTIGMEM_ENABLE
354 config ARCH_DISCONTIGMEM_DEFAULT
355 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
356 depends on ARCH_DISCONTIGMEM_ENABLE
360 depends on !IA64_HP_SIM && !FLATMEM
361 default y if IA64_SGI_SN2
362 select ACPI_NUMA if ACPI
364 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
365 Access). This option is for configuring high-end multiprocessor
366 server systems. If in doubt, say N.
369 int "Max num nodes shift(3-10)"
372 depends on NEED_MULTIPLE_NODES
374 This option specifies the maximum number of nodes in your SSI system.
375 MAX_NUMNODES will be 2^(This value).
376 If in doubt, use the default.
378 config ARCH_POPULATES_NODE_MAP
381 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
382 # VIRTUAL_MEM_MAP has been retained for historical reasons.
383 config VIRTUAL_MEM_MAP
384 bool "Virtual mem map"
385 depends on !SPARSEMEM
386 default y if !IA64_HP_SIM
388 Say Y to compile the kernel with support for a virtual mem map.
389 This code also only takes effect if a memory hole of greater than
390 1 Gb is found during boot. You must turn this option on if you
391 require the DISCONTIGMEM option for your machine. If you are
396 default y if VIRTUAL_MEM_MAP
398 config HAVE_ARCH_EARLY_PFN_TO_NID
400 depends on NEED_MULTIPLE_NODES
402 config HAVE_ARCH_NODEDATA_EXTENSION
407 bool "Support for Linux/x86 binaries"
409 IA-64 processors can execute IA-32 (X86) instructions. By
410 saying Y here, the kernel will include IA-32 system call
411 emulation support which makes it possible to transparently
412 run IA-32 Linux binaries on an IA-64 Linux system.
417 depends on IA32_SUPPORT
420 config IA64_MCA_RECOVERY
421 tristate "MCA recovery from errors other than TLB."
424 bool "Performance monitor support"
426 Selects whether support for the IA-64 performance monitor hardware
427 is included in the kernel. This makes some kernel data-structures a
428 little bigger and slows down execution a bit, but it is generally
429 a good idea to turn this on. If you're unsure, say Y.
432 tristate "/proc/pal support"
434 If you say Y here, you are able to get PAL (Processor Abstraction
435 Layer) information in /proc/pal. This contains useful information
436 about the processors in your systems, such as cache and TLB sizes
437 and the PAL firmware version in use.
439 To use this option, you have to ensure that the "/proc file system
440 support" (CONFIG_PROC_FS) is enabled, too.
442 config IA64_MC_ERR_INJECT
443 tristate "MC error injection support"
445 Selets whether support for MC error injection. By enabling the
446 support, kernel provide sysfs interface for user application to
447 call MC error injection PAL procedure to inject various errors.
448 This is a useful tool for MCA testing.
450 If you're unsure, do not select this option.
453 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
456 bool "ESI (Extensible SAL Interface) support"
458 If you say Y here, support is built into the kernel to
459 make ESI calls. ESI calls are used to support vendor-specific
460 firmware extensions, such as the ability to inject memory-errors
461 for test-purposes. If you're unsure, say N.
463 source "drivers/sn/Kconfig"
466 bool "kexec system call (EXPERIMENTAL)"
467 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
469 kexec is a system call that implements the ability to shutdown your
470 current kernel, and to start another kernel. It is like a reboot
471 but it is independent of the system firmware. And like a reboot
472 you can start any kernel with it, not just Linux.
474 The name comes from the similiarity to the exec system call.
476 It is an ongoing process to be certain the hardware in a machine
477 is properly shutdown, so do not be surprised if this code does not
478 initially work for you. It may help to enable device hotplugging
479 support. As of this writing the exact hardware interface is
480 strongly in flux, so no good recommendation can be made.
483 bool "kernel crash dumps (EXPERIMENTAL)"
484 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
486 Generate crash dump after being started by kexec.
488 source "drivers/firmware/Kconfig"
490 source "fs/Kconfig.binfmt"
494 menu "Power management and ACPI"
496 source "kernel/power/Kconfig"
498 source "drivers/acpi/Kconfig"
502 source "arch/ia64/kernel/cpufreq/Kconfig"
510 menu "Bus options (PCI, PCMCIA)"
515 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
516 here unless you are using a simulator without PCI support.
522 source "drivers/pci/pcie/Kconfig"
524 source "drivers/pci/Kconfig"
526 source "drivers/pci/hotplug/Kconfig"
528 source "drivers/pcmcia/Kconfig"
536 source "drivers/Kconfig"
539 tristate "Memory special operations driver"
541 select IA64_UNCACHED_ALLOCATOR
543 If you have an ia64 and you want to enable memory special
544 operations support (formerly known as fetchop), say Y here,
552 # Use the generic interrupt handling code in kernel/irq/:
554 config GENERIC_HARDIRQS
558 config GENERIC_IRQ_PROBE
562 config GENERIC_PENDING_IRQ
564 depends on GENERIC_HARDIRQS && SMP
571 source "arch/ia64/hp/sim/Kconfig"
573 menu "Instrumentation Support"
574 depends on EXPERIMENTAL
576 source "arch/ia64/oprofile/Kconfig"
579 bool "Kprobes (EXPERIMENTAL)"
580 depends on KALLSYMS && EXPERIMENTAL && MODULES
582 Kprobes allows you to trap at almost any kernel address and
583 execute a callback function. register_kprobe() establishes
584 a probepoint and specifies the callback. Kprobes is useful
585 for kernel debugging, non-intrusive instrumentation and testing.
586 If in doubt, say "N".
589 source "arch/ia64/Kconfig.debug"
591 source "security/Kconfig"
593 source "crypto/Kconfig"