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
21 select HAVE_KRETPROBES
24 The Itanium Processor Family is Intel's 64-bit successor to
25 the 32-bit X86 line. The IA-64 Linux project has a home
26 page at <http://www.linuxia64.org/> and a mailing list at
27 <linux-ia64@vger.kernel.org>.
31 select ATA_NONSTANDARD if ATA
36 depends on !IA64_SGI_SN2
49 config GENERIC_LOCKBREAK
52 depends on SMP && PREEMPT
54 config RWSEM_XCHGADD_ALGORITHM
58 config ARCH_HAS_ILOG2_U32
62 config ARCH_HAS_ILOG2_U64
66 config HUGETLB_PAGE_SIZE_VARIABLE
68 depends on HUGETLB_PAGE
71 config GENERIC_FIND_NEXT_BIT
75 config GENERIC_CALIBRATE_DELAY
83 config GENERIC_TIME_VSYSCALL
87 config HAVE_SETUP_PER_CPU_AREA
102 config SCHED_NO_NO_OMIT_FRAME_POINTER
106 config IA64_UNCACHED_ALLOCATOR
108 select GENERIC_ALLOCATOR
124 This selects the system type of your hardware. A "generic" kernel
125 will run on any supported IA-64 system. However, if you configure
126 a kernel for your specific system, it will be faster and smaller.
128 generic For any supported IA-64 system
129 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
130 HP-zx1/sx1000 For HP systems
131 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
132 SGI-SN2 For SGI Altix systems
133 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
135 If you don't know what to do, choose "generic".
144 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
145 support for the HP I/O MMU.
147 config IA64_HP_ZX1_SWIOTLB
148 bool "HP-zx1/sx1000 with software I/O TLB"
151 Build a kernel that runs on HP zx1 and sx1000 systems even when they
152 have broken PCI devices which cannot DMA to full 32 bits. Apart
153 from support for the HP I/O MMU, this includes support for the software
154 I/O TLB, which allows supporting the broken devices at the expense of
155 wasting some kernel memory (about 2MB by default).
162 Selecting this option will optimize the kernel for use on sn2 based
163 systems, but the resulting kernel binary will not run on other
164 types of ia64 systems. If you have an SGI Altix system, it's safe
165 to select this option. If in doubt, select ia64 generic support
175 prompt "Processor type"
181 Select your IA-64 processor type. The default is Itanium.
182 This choice is safe for all IA-64 systems, but may not perform
183 optimally on systems with, say, Itanium 2 or newer processors.
188 Select this to configure for an Itanium 2 (McKinley) processor.
193 prompt "Kernel page size"
194 default IA64_PAGE_SIZE_16KB
196 config IA64_PAGE_SIZE_4KB
199 This lets you select the page size of the kernel. For best IA-64
200 performance, a page size of 8KB or 16KB is recommended. For best
201 IA-32 compatibility, a page size of 4KB should be selected (the vast
202 majority of IA-32 binaries work perfectly fine with a larger page
203 size). For Itanium 2 or newer systems, a page size of 64KB can also
206 4KB For best IA-32 compatibility
207 8KB For best IA-64 performance
208 16KB For best IA-64 performance
209 64KB Requires Itanium 2 or newer processor.
211 If you don't know what to do, choose 16KB.
213 config IA64_PAGE_SIZE_8KB
216 config IA64_PAGE_SIZE_16KB
219 config IA64_PAGE_SIZE_64KB
226 prompt "Page Table Levels"
233 depends on !IA64_PAGE_SIZE_64KB
244 source kernel/Kconfig.hz
252 # align cache-sensitive data to 128 bytes
253 config IA64_L1_CACHE_SHIFT
255 default "7" if MCKINLEY
256 default "6" if ITANIUM
259 bool "Cyclone (EXA) Time Source support"
261 Say Y here to enable support for IBM EXA Cyclone time source.
262 If you're unsure, answer N.
266 depends on !IA64_HP_SIM
269 config IA64_SGI_SN_XP
270 tristate "Support communication between SGI SSIs"
271 depends on IA64_GENERIC || IA64_SGI_SN2
272 select IA64_UNCACHED_ALLOCATOR
274 An SGI machine can be divided into multiple Single System
275 Images which act independently of each other and have
276 hardware based memory protection from the others. Enabling
277 this feature will allow for direct communication between SSIs
278 based on a network adapter and DMA messaging.
280 config FORCE_MAX_ZONEORDER
281 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
282 range 11 17 if !HUGETLB_PAGE
283 default "17" if HUGETLB_PAGE
286 config VIRT_CPU_ACCOUNTING
287 bool "Deterministic task and CPU time accounting"
290 Select this option to enable more accurate task and CPU time
291 accounting. This is done by reading a CPU counter on each
292 kernel entry and exit and on transitions within the kernel
293 between system, softirq and hardirq state, so there is a
294 small performance impact.
295 If in doubt, say N here.
298 bool "Symmetric multi-processing support"
300 This enables support for systems with more than one CPU. If you have
301 a system with only one CPU, say N. If you have a system with more
304 If you say N here, the kernel will run on single and multiprocessor
305 systems, but will use only one CPU of a multiprocessor system. If
306 you say Y here, the kernel will run on many, but not all,
307 single processor systems. On a single processor system, the kernel
308 will run faster if you say N here.
310 See also the SMP-HOWTO available at
311 <http://www.tldp.org/docs.html#howto>.
313 If you don't know what to do here, say N.
316 int "Maximum number of CPUs (2-1024)"
321 You should set this to the number of CPUs in your system, but
322 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
323 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
324 than 64 will cause the use of a CPU mask array, causing a small
328 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
329 depends on SMP && EXPERIMENTAL
333 Say Y here to experiment with turning CPUs off and on. CPUs
334 can be controlled through /sys/devices/system/cpu/cpu#.
335 Say N if you want to disable CPU hotplug.
337 config ARCH_ENABLE_MEMORY_HOTPLUG
340 config ARCH_ENABLE_MEMORY_HOTREMOVE
344 bool "SMT scheduler support"
347 Improves the CPU scheduler's decision making when dealing with
348 Intel IA64 chips with MultiThreading at a cost of slightly increased
349 overhead in some places. If unsure say N here.
351 config PERMIT_BSP_REMOVE
352 bool "Support removal of Bootstrap Processor"
353 depends on HOTPLUG_CPU
356 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
359 config FORCE_CPEI_RETARGET
360 bool "Force assumption that CPEI can be re-targetted"
361 depends on PERMIT_BSP_REMOVE
364 Say Y if you need to force the assumption that CPEI can be re-targetted to
365 any cpu in the system. This hint is available via ACPI 3.0 specifications.
366 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
367 This option it useful to enable this feature on older BIOS's as well.
368 You can also enable this by using boot command line option force_cpei=1.
370 source "kernel/Kconfig.preempt"
374 config ARCH_SELECT_MEMORY_MODEL
377 config ARCH_DISCONTIGMEM_ENABLE
380 Say Y to support efficient handling of discontiguous physical memory,
381 for architectures which are either NUMA (Non-Uniform Memory Access)
382 or have huge holes in the physical address space for other reasons.
383 See <file:Documentation/vm/numa> for more.
385 config ARCH_FLATMEM_ENABLE
388 config ARCH_SPARSEMEM_ENABLE
390 depends on ARCH_DISCONTIGMEM_ENABLE
391 select SPARSEMEM_VMEMMAP_ENABLE
393 config ARCH_DISCONTIGMEM_DEFAULT
394 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
395 depends on ARCH_DISCONTIGMEM_ENABLE
399 depends on !IA64_HP_SIM && !FLATMEM
400 default y if IA64_SGI_SN2
401 select ACPI_NUMA if ACPI
403 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
404 Access). This option is for configuring high-end multiprocessor
405 server systems. If in doubt, say N.
408 int "Max num nodes shift(3-10)"
411 depends on NEED_MULTIPLE_NODES
413 This option specifies the maximum number of nodes in your SSI system.
414 MAX_NUMNODES will be 2^(This value).
415 If in doubt, use the default.
417 config ARCH_POPULATES_NODE_MAP
420 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
421 # VIRTUAL_MEM_MAP has been retained for historical reasons.
422 config VIRTUAL_MEM_MAP
423 bool "Virtual mem map"
424 depends on !SPARSEMEM
425 default y if !IA64_HP_SIM
427 Say Y to compile the kernel with support for a virtual mem map.
428 This code also only takes effect if a memory hole of greater than
429 1 Gb is found during boot. You must turn this option on if you
430 require the DISCONTIGMEM option for your machine. If you are
435 default y if VIRTUAL_MEM_MAP
437 config HAVE_ARCH_EARLY_PFN_TO_NID
439 depends on NEED_MULTIPLE_NODES
441 config HAVE_ARCH_NODEDATA_EXTENSION
446 bool "Support for Linux/x86 binaries"
448 IA-64 processors can execute IA-32 (X86) instructions. By
449 saying Y here, the kernel will include IA-32 system call
450 emulation support which makes it possible to transparently
451 run IA-32 Linux binaries on an IA-64 Linux system.
456 depends on IA32_SUPPORT
459 config COMPAT_FOR_U64_ALIGNMENT
462 config IA64_MCA_RECOVERY
463 tristate "MCA recovery from errors other than TLB."
466 bool "Performance monitor support"
468 Selects whether support for the IA-64 performance monitor hardware
469 is included in the kernel. This makes some kernel data-structures a
470 little bigger and slows down execution a bit, but it is generally
471 a good idea to turn this on. If you're unsure, say Y.
474 tristate "/proc/pal support"
476 If you say Y here, you are able to get PAL (Processor Abstraction
477 Layer) information in /proc/pal. This contains useful information
478 about the processors in your systems, such as cache and TLB sizes
479 and the PAL firmware version in use.
481 To use this option, you have to ensure that the "/proc file system
482 support" (CONFIG_PROC_FS) is enabled, too.
484 config IA64_MC_ERR_INJECT
485 tristate "MC error injection support"
487 Adds support for MC error injection. If enabled, the kernel
488 will provide a sysfs interface for user applications to
489 call MC error injection PAL procedures to inject various errors.
490 This is a useful tool for MCA testing.
492 If you're unsure, do not select this option.
495 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
498 bool "ESI (Extensible SAL Interface) support"
500 If you say Y here, support is built into the kernel to
501 make ESI calls. ESI calls are used to support vendor-specific
502 firmware extensions, such as the ability to inject memory-errors
503 for test-purposes. If you're unsure, say N.
505 config IA64_HP_AML_NFW
506 bool "Support ACPI AML calls to native firmware"
508 This driver installs a global ACPI Operation Region handler for
509 region 0xA1. AML methods can use this OpRegion to call arbitrary
510 native firmware functions. The driver installs the OpRegion
511 handler if there is an HPQ5001 device or if the user supplies
512 the "force" module parameter, e.g., with the "aml_nfw.force"
513 kernel command line option.
515 source "drivers/sn/Kconfig"
518 bool "kexec system call (EXPERIMENTAL)"
519 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
521 kexec is a system call that implements the ability to shutdown your
522 current kernel, and to start another kernel. It is like a reboot
523 but it is independent of the system firmware. And like a reboot
524 you can start any kernel with it, not just Linux.
526 The name comes from the similarity to the exec system call.
528 It is an ongoing process to be certain the hardware in a machine
529 is properly shutdown, so do not be surprised if this code does not
530 initially work for you. It may help to enable device hotplugging
531 support. As of this writing the exact hardware interface is
532 strongly in flux, so no good recommendation can be made.
535 bool "kernel crash dumps (EXPERIMENTAL)"
536 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
538 Generate crash dump after being started by kexec.
540 source "drivers/firmware/Kconfig"
542 source "fs/Kconfig.binfmt"
546 menu "Power management and ACPI"
548 source "kernel/power/Kconfig"
550 source "drivers/acpi/Kconfig"
554 source "arch/ia64/kernel/cpufreq/Kconfig"
562 menu "Bus options (PCI, PCMCIA)"
567 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
568 here unless you are using a simulator without PCI support.
576 source "drivers/pci/pcie/Kconfig"
578 source "drivers/pci/Kconfig"
580 source "drivers/pci/hotplug/Kconfig"
582 source "drivers/pcmcia/Kconfig"
590 source "drivers/Kconfig"
593 tristate "Memory special operations driver"
595 select IA64_UNCACHED_ALLOCATOR
597 If you have an ia64 and you want to enable memory special
598 operations support (formerly known as fetchop), say Y here,
606 # Use the generic interrupt handling code in kernel/irq/:
608 config GENERIC_HARDIRQS
612 config GENERIC_IRQ_PROBE
616 config GENERIC_PENDING_IRQ
618 depends on GENERIC_HARDIRQS && SMP
626 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC)
628 source "arch/ia64/hp/sim/Kconfig"
630 source "arch/ia64/Kconfig.debug"
632 source "security/Kconfig"
634 source "crypto/Kconfig"