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
45 config GENERIC_LOCKBREAK
48 depends on SMP && PREEMPT
50 config RWSEM_XCHGADD_ALGORITHM
54 config ARCH_HAS_ILOG2_U32
58 config ARCH_HAS_ILOG2_U64
62 config HUGETLB_PAGE_SIZE_VARIABLE
64 depends on HUGETLB_PAGE
67 config GENERIC_FIND_NEXT_BIT
71 config GENERIC_CALIBRATE_DELAY
79 config GENERIC_TIME_VSYSCALL
83 config HAVE_SETUP_PER_CPU_AREA
98 config SCHED_NO_NO_OMIT_FRAME_POINTER
102 config IA64_UNCACHED_ALLOCATOR
104 select GENERIC_ALLOCATOR
120 This selects the system type of your hardware. A "generic" kernel
121 will run on any supported IA-64 system. However, if you configure
122 a kernel for your specific system, it will be faster and smaller.
124 generic For any supported IA-64 system
125 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
126 HP-zx1/sx1000 For HP systems
127 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
128 SGI-SN2 For SGI Altix systems
129 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
131 If you don't know what to do, choose "generic".
140 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
141 support for the HP I/O MMU.
143 config IA64_HP_ZX1_SWIOTLB
144 bool "HP-zx1/sx1000 with software I/O TLB"
147 Build a kernel that runs on HP zx1 and sx1000 systems even when they
148 have broken PCI devices which cannot DMA to full 32 bits. Apart
149 from support for the HP I/O MMU, this includes support for the software
150 I/O TLB, which allows supporting the broken devices at the expense of
151 wasting some kernel memory (about 2MB by default).
156 Selecting this option will optimize the kernel for use on sn2 based
157 systems, but the resulting kernel binary will not run on other
158 types of ia64 systems. If you have an SGI Altix system, it's safe
159 to select this option. If in doubt, select ia64 generic support
169 prompt "Processor type"
175 Select your IA-64 processor type. The default is Itanium.
176 This choice is safe for all IA-64 systems, but may not perform
177 optimally on systems with, say, Itanium 2 or newer processors.
182 Select this to configure for an Itanium 2 (McKinley) processor.
187 prompt "Kernel page size"
188 default IA64_PAGE_SIZE_16KB
190 config IA64_PAGE_SIZE_4KB
193 This lets you select the page size of the kernel. For best IA-64
194 performance, a page size of 8KB or 16KB is recommended. For best
195 IA-32 compatibility, a page size of 4KB should be selected (the vast
196 majority of IA-32 binaries work perfectly fine with a larger page
197 size). For Itanium 2 or newer systems, a page size of 64KB can also
200 4KB For best IA-32 compatibility
201 8KB For best IA-64 performance
202 16KB For best IA-64 performance
203 64KB Requires Itanium 2 or newer processor.
205 If you don't know what to do, choose 16KB.
207 config IA64_PAGE_SIZE_8KB
210 config IA64_PAGE_SIZE_16KB
213 config IA64_PAGE_SIZE_64KB
220 prompt "Page Table Levels"
227 depends on !IA64_PAGE_SIZE_64KB
232 source kernel/Kconfig.hz
239 # align cache-sensitive data to 128 bytes
240 config IA64_L1_CACHE_SHIFT
242 default "7" if MCKINLEY
243 default "6" if ITANIUM
246 bool "Cyclone (EXA) Time Source support"
248 Say Y here to enable support for IBM EXA Cyclone time source.
249 If you're unsure, answer N.
253 depends on !IA64_HP_SIM
256 config IA64_SGI_SN_XP
257 tristate "Support communication between SGI SSIs"
258 depends on IA64_GENERIC || IA64_SGI_SN2
259 select IA64_UNCACHED_ALLOCATOR
261 An SGI machine can be divided into multiple Single System
262 Images which act independently of each other and have
263 hardware based memory protection from the others. Enabling
264 this feature will allow for direct communication between SSIs
265 based on a network adapter and DMA messaging.
267 config FORCE_MAX_ZONEORDER
268 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
269 range 11 17 if !HUGETLB_PAGE
270 default "17" if HUGETLB_PAGE
274 bool "Symmetric multi-processing support"
276 This enables support for systems with more than one CPU. If you have
277 a system with only one CPU, say N. If you have a system with more
280 If you say N here, the kernel will run on single and multiprocessor
281 systems, but will use only one CPU of a multiprocessor system. If
282 you say Y here, the kernel will run on many, but not all,
283 single processor systems. On a single processor system, the kernel
284 will run faster if you say N here.
286 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
287 available at <http://www.tldp.org/docs.html#howto>.
289 If you don't know what to do here, say N.
292 int "Maximum number of CPUs (2-1024)"
297 You should set this to the number of CPUs in your system, but
298 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
299 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
300 than 64 will cause the use of a CPU mask array, causing a small
304 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
305 depends on SMP && EXPERIMENTAL
309 Say Y here to experiment with turning CPUs off and on. CPUs
310 can be controlled through /sys/devices/system/cpu/cpu#.
311 Say N if you want to disable CPU hotplug.
313 config ARCH_ENABLE_MEMORY_HOTPLUG
316 config ARCH_ENABLE_MEMORY_HOTREMOVE
320 bool "SMT scheduler support"
323 Improves the CPU scheduler's decision making when dealing with
324 Intel IA64 chips with MultiThreading at a cost of slightly increased
325 overhead in some places. If unsure say N here.
327 config PERMIT_BSP_REMOVE
328 bool "Support removal of Bootstrap Processor"
329 depends on HOTPLUG_CPU
332 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
335 config FORCE_CPEI_RETARGET
336 bool "Force assumption that CPEI can be re-targetted"
337 depends on PERMIT_BSP_REMOVE
340 Say Y if you need to force the assumption that CPEI can be re-targetted to
341 any cpu in the system. This hint is available via ACPI 3.0 specifications.
342 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
343 This option it useful to enable this feature on older BIOS's as well.
344 You can also enable this by using boot command line option force_cpei=1.
346 source "kernel/Kconfig.preempt"
350 config ARCH_SELECT_MEMORY_MODEL
353 config ARCH_DISCONTIGMEM_ENABLE
356 Say Y to support efficient handling of discontiguous physical memory,
357 for architectures which are either NUMA (Non-Uniform Memory Access)
358 or have huge holes in the physical address space for other reasons.
359 See <file:Documentation/vm/numa> for more.
361 config ARCH_FLATMEM_ENABLE
364 config ARCH_SPARSEMEM_ENABLE
366 depends on ARCH_DISCONTIGMEM_ENABLE
367 select SPARSEMEM_VMEMMAP_ENABLE
369 config ARCH_DISCONTIGMEM_DEFAULT
370 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
371 depends on ARCH_DISCONTIGMEM_ENABLE
375 depends on !IA64_HP_SIM && !FLATMEM
376 default y if IA64_SGI_SN2
377 select ACPI_NUMA if ACPI
379 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
380 Access). This option is for configuring high-end multiprocessor
381 server systems. If in doubt, say N.
384 int "Max num nodes shift(3-10)"
387 depends on NEED_MULTIPLE_NODES
389 This option specifies the maximum number of nodes in your SSI system.
390 MAX_NUMNODES will be 2^(This value).
391 If in doubt, use the default.
393 config ARCH_POPULATES_NODE_MAP
396 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
397 # VIRTUAL_MEM_MAP has been retained for historical reasons.
398 config VIRTUAL_MEM_MAP
399 bool "Virtual mem map"
400 depends on !SPARSEMEM
401 default y if !IA64_HP_SIM
403 Say Y to compile the kernel with support for a virtual mem map.
404 This code also only takes effect if a memory hole of greater than
405 1 Gb is found during boot. You must turn this option on if you
406 require the DISCONTIGMEM option for your machine. If you are
411 default y if VIRTUAL_MEM_MAP
413 config HAVE_ARCH_EARLY_PFN_TO_NID
415 depends on NEED_MULTIPLE_NODES
417 config HAVE_ARCH_NODEDATA_EXTENSION
422 bool "Support for Linux/x86 binaries"
424 IA-64 processors can execute IA-32 (X86) instructions. By
425 saying Y here, the kernel will include IA-32 system call
426 emulation support which makes it possible to transparently
427 run IA-32 Linux binaries on an IA-64 Linux system.
432 depends on IA32_SUPPORT
435 config COMPAT_FOR_U64_ALIGNMENT
438 config IA64_MCA_RECOVERY
439 tristate "MCA recovery from errors other than TLB."
442 bool "Performance monitor support"
444 Selects whether support for the IA-64 performance monitor hardware
445 is included in the kernel. This makes some kernel data-structures a
446 little bigger and slows down execution a bit, but it is generally
447 a good idea to turn this on. If you're unsure, say Y.
450 tristate "/proc/pal support"
452 If you say Y here, you are able to get PAL (Processor Abstraction
453 Layer) information in /proc/pal. This contains useful information
454 about the processors in your systems, such as cache and TLB sizes
455 and the PAL firmware version in use.
457 To use this option, you have to ensure that the "/proc file system
458 support" (CONFIG_PROC_FS) is enabled, too.
460 config IA64_MC_ERR_INJECT
461 tristate "MC error injection support"
463 Adds support for MC error injection. If enabled, the kernel
464 will provide a sysfs interface for user applications to
465 call MC error injection PAL procedures to inject various errors.
466 This is a useful tool for MCA testing.
468 If you're unsure, do not select this option.
471 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
474 bool "ESI (Extensible SAL Interface) support"
476 If you say Y here, support is built into the kernel to
477 make ESI calls. ESI calls are used to support vendor-specific
478 firmware extensions, such as the ability to inject memory-errors
479 for test-purposes. If you're unsure, say N.
481 config IA64_HP_AML_NFW
482 bool "Support ACPI AML calls to native firmware"
484 This driver installs a global ACPI Operation Region handler for
485 region 0xA1. AML methods can use this OpRegion to call arbitrary
486 native firmware functions. The driver installs the OpRegion
487 handler if there is an HPQ5001 device or if the user supplies
488 the "force" module parameter, e.g., with the "aml_nfw.force"
489 kernel command line option.
491 source "drivers/sn/Kconfig"
494 bool "kexec system call (EXPERIMENTAL)"
495 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
497 kexec is a system call that implements the ability to shutdown your
498 current kernel, and to start another kernel. It is like a reboot
499 but it is independent of the system firmware. And like a reboot
500 you can start any kernel with it, not just Linux.
502 The name comes from the similarity to the exec system call.
504 It is an ongoing process to be certain the hardware in a machine
505 is properly shutdown, so do not be surprised if this code does not
506 initially work for you. It may help to enable device hotplugging
507 support. As of this writing the exact hardware interface is
508 strongly in flux, so no good recommendation can be made.
511 bool "kernel crash dumps (EXPERIMENTAL)"
512 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
514 Generate crash dump after being started by kexec.
516 source "drivers/firmware/Kconfig"
518 source "fs/Kconfig.binfmt"
522 menu "Power management and ACPI"
524 source "kernel/power/Kconfig"
526 source "drivers/acpi/Kconfig"
530 source "arch/ia64/kernel/cpufreq/Kconfig"
538 menu "Bus options (PCI, PCMCIA)"
543 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
544 here unless you are using a simulator without PCI support.
552 source "drivers/pci/pcie/Kconfig"
554 source "drivers/pci/Kconfig"
556 source "drivers/pci/hotplug/Kconfig"
558 source "drivers/pcmcia/Kconfig"
566 source "drivers/Kconfig"
569 tristate "Memory special operations driver"
571 select IA64_UNCACHED_ALLOCATOR
573 If you have an ia64 and you want to enable memory special
574 operations support (formerly known as fetchop), say Y here,
582 # Use the generic interrupt handling code in kernel/irq/:
584 config GENERIC_HARDIRQS
588 config GENERIC_IRQ_PROBE
592 config GENERIC_PENDING_IRQ
594 depends on GENERIC_HARDIRQS && SMP
601 source "arch/ia64/hp/sim/Kconfig"
603 source "kernel/Kconfig.instrumentation"
605 source "arch/ia64/Kconfig.debug"
607 source "security/Kconfig"
609 source "crypto/Kconfig"