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 select HAVE_ARCH_TRACEHOOK
27 The Itanium Processor Family is Intel's 64-bit successor to
28 the 32-bit X86 line. The IA-64 Linux project has a home
29 page at <http://www.linuxia64.org/> and a mailing list at
30 <linux-ia64@vger.kernel.org>.
34 select ATA_NONSTANDARD if ATA
39 depends on !IA64_SGI_SN2
55 config GENERIC_LOCKBREAK
58 depends on SMP && PREEMPT
60 config RWSEM_XCHGADD_ALGORITHM
64 config HUGETLB_PAGE_SIZE_VARIABLE
66 depends on HUGETLB_PAGE
69 config GENERIC_FIND_NEXT_BIT
73 config GENERIC_CALIBRATE_DELAY
81 config GENERIC_TIME_VSYSCALL
85 config HAVE_SETUP_PER_CPU_AREA
100 config SCHED_NO_NO_OMIT_FRAME_POINTER
104 config IA64_UNCACHED_ALLOCATOR
106 select GENERIC_ALLOCATOR
112 menuconfig PARAVIRT_GUEST
113 bool "Paravirtualized guest support"
115 Say Y here to get to see options related to running Linux under
116 various hypervisors. This option alone does not add any kernel code.
118 If you say N, all options in this submenu will be skipped and disabled.
123 bool "Enable paravirtualization code"
124 depends on PARAVIRT_GUEST
129 This changes the kernel so it can modify itself when it is run
130 under a hypervisor, potentially improving performance significantly
131 over full virtualization. However, when run without a hypervisor
132 the kernel is theoretically slower and slightly larger.
135 source "arch/ia64/xen/Kconfig"
149 This selects the system type of your hardware. A "generic" kernel
150 will run on any supported IA-64 system. However, if you configure
151 a kernel for your specific system, it will be faster and smaller.
153 generic For any supported IA-64 system
154 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
155 HP-zx1/sx1000 For HP systems
156 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
157 SGI-SN2 For SGI Altix systems
158 SGI-UV For SGI UV systems
159 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
160 Xen-domU For xen domU system
162 If you don't know what to do, choose "generic".
171 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
172 support for the HP I/O MMU.
174 config IA64_HP_ZX1_SWIOTLB
175 bool "HP-zx1/sx1000 with software I/O TLB"
178 Build a kernel that runs on HP zx1 and sx1000 systems even when they
179 have broken PCI devices which cannot DMA to full 32 bits. Apart
180 from support for the HP I/O MMU, this includes support for the software
181 I/O TLB, which allows supporting the broken devices at the expense of
182 wasting some kernel memory (about 2MB by default).
189 Selecting this option will optimize the kernel for use on sn2 based
190 systems, but the resulting kernel binary will not run on other
191 types of ia64 systems. If you have an SGI Altix system, it's safe
192 to select this option. If in doubt, select ia64 generic support
201 Selecting this option will optimize the kernel for use on UV based
202 systems, but the resulting kernel binary will not run on other
203 types of ia64 systems. If you have an SGI UV system, it's safe
204 to select this option. If in doubt, select ia64 generic support
211 config IA64_XEN_GUEST
218 prompt "Processor type"
224 Select your IA-64 processor type. The default is Itanium.
225 This choice is safe for all IA-64 systems, but may not perform
226 optimally on systems with, say, Itanium 2 or newer processors.
231 Select this to configure for an Itanium 2 (McKinley) processor.
236 prompt "Kernel page size"
237 default IA64_PAGE_SIZE_16KB
239 config IA64_PAGE_SIZE_4KB
242 This lets you select the page size of the kernel. For best IA-64
243 performance, a page size of 8KB or 16KB is recommended. For best
244 IA-32 compatibility, a page size of 4KB should be selected (the vast
245 majority of IA-32 binaries work perfectly fine with a larger page
246 size). For Itanium 2 or newer systems, a page size of 64KB can also
249 4KB For best IA-32 compatibility
250 8KB For best IA-64 performance
251 16KB For best IA-64 performance
252 64KB Requires Itanium 2 or newer processor.
254 If you don't know what to do, choose 16KB.
256 config IA64_PAGE_SIZE_8KB
259 config IA64_PAGE_SIZE_16KB
262 config IA64_PAGE_SIZE_64KB
269 prompt "Page Table Levels"
276 depends on !IA64_PAGE_SIZE_64KB
287 source kernel/Kconfig.hz
295 # align cache-sensitive data to 128 bytes
296 config IA64_L1_CACHE_SHIFT
298 default "7" if MCKINLEY
299 default "6" if ITANIUM
302 bool "Cyclone (EXA) Time Source support"
304 Say Y here to enable support for IBM EXA Cyclone time source.
305 If you're unsure, answer N.
309 depends on !IA64_HP_SIM
312 config FORCE_MAX_ZONEORDER
313 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
314 range 11 17 if !HUGETLB_PAGE
315 default "17" if HUGETLB_PAGE
318 config VIRT_CPU_ACCOUNTING
319 bool "Deterministic task and CPU time accounting"
322 Select this option to enable more accurate task and CPU time
323 accounting. This is done by reading a CPU counter on each
324 kernel entry and exit and on transitions within the kernel
325 between system, softirq and hardirq state, so there is a
326 small performance impact.
327 If in doubt, say N here.
330 bool "Symmetric multi-processing support"
331 select USE_GENERIC_SMP_HELPERS
333 This enables support for systems with more than one CPU. If you have
334 a system with only one CPU, say N. If you have a system with more
337 If you say N here, the kernel will run on single and multiprocessor
338 systems, but will use only one CPU of a multiprocessor system. If
339 you say Y here, the kernel will run on many, but not all,
340 single processor systems. On a single processor system, the kernel
341 will run faster if you say N here.
343 See also the SMP-HOWTO available at
344 <http://www.tldp.org/docs.html#howto>.
346 If you don't know what to do here, say N.
349 int "Maximum number of CPUs (2-4096)"
354 You should set this to the number of CPUs in your system, but
355 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
356 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
357 than 64 will cause the use of a CPU mask array, causing a small
361 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
362 depends on SMP && EXPERIMENTAL
366 Say Y here to experiment with turning CPUs off and on. CPUs
367 can be controlled through /sys/devices/system/cpu/cpu#.
368 Say N if you want to disable CPU hotplug.
370 config ARCH_ENABLE_MEMORY_HOTPLUG
373 config ARCH_ENABLE_MEMORY_HOTREMOVE
377 bool "SMT scheduler support"
380 Improves the CPU scheduler's decision making when dealing with
381 Intel IA64 chips with MultiThreading at a cost of slightly increased
382 overhead in some places. If unsure say N here.
384 config PERMIT_BSP_REMOVE
385 bool "Support removal of Bootstrap Processor"
386 depends on HOTPLUG_CPU
389 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
392 config FORCE_CPEI_RETARGET
393 bool "Force assumption that CPEI can be re-targetted"
394 depends on PERMIT_BSP_REMOVE
397 Say Y if you need to force the assumption that CPEI can be re-targetted to
398 any cpu in the system. This hint is available via ACPI 3.0 specifications.
399 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
400 This option it useful to enable this feature on older BIOS's as well.
401 You can also enable this by using boot command line option force_cpei=1.
403 source "kernel/Kconfig.preempt"
407 config ARCH_SELECT_MEMORY_MODEL
410 config ARCH_DISCONTIGMEM_ENABLE
413 Say Y to support efficient handling of discontiguous physical memory,
414 for architectures which are either NUMA (Non-Uniform Memory Access)
415 or have huge holes in the physical address space for other reasons.
416 See <file:Documentation/vm/numa> for more.
418 config ARCH_FLATMEM_ENABLE
421 config ARCH_SPARSEMEM_ENABLE
423 depends on ARCH_DISCONTIGMEM_ENABLE
424 select SPARSEMEM_VMEMMAP_ENABLE
426 config ARCH_DISCONTIGMEM_DEFAULT
427 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
428 depends on ARCH_DISCONTIGMEM_ENABLE
432 depends on !IA64_HP_SIM && !FLATMEM
433 default y if IA64_SGI_SN2
434 select ACPI_NUMA if ACPI
436 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
437 Access). This option is for configuring high-end multiprocessor
438 server systems. If in doubt, say N.
441 int "Max num nodes shift(3-10)"
444 depends on NEED_MULTIPLE_NODES
446 This option specifies the maximum number of nodes in your SSI system.
447 MAX_NUMNODES will be 2^(This value).
448 If in doubt, use the default.
450 config ARCH_POPULATES_NODE_MAP
453 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
454 # VIRTUAL_MEM_MAP has been retained for historical reasons.
455 config VIRTUAL_MEM_MAP
456 bool "Virtual mem map"
457 depends on !SPARSEMEM
458 default y if !IA64_HP_SIM
460 Say Y to compile the kernel with support for a virtual mem map.
461 This code also only takes effect if a memory hole of greater than
462 1 Gb is found during boot. You must turn this option on if you
463 require the DISCONTIGMEM option for your machine. If you are
468 default y if VIRTUAL_MEM_MAP
470 config HAVE_ARCH_EARLY_PFN_TO_NID
472 depends on NEED_MULTIPLE_NODES
474 config HAVE_ARCH_NODEDATA_EXTENSION
479 bool "Support for Linux/x86 binaries"
481 IA-64 processors can execute IA-32 (X86) instructions. By
482 saying Y here, the kernel will include IA-32 system call
483 emulation support which makes it possible to transparently
484 run IA-32 Linux binaries on an IA-64 Linux system.
489 depends on IA32_SUPPORT
492 config COMPAT_FOR_U64_ALIGNMENT
495 config IA64_MCA_RECOVERY
496 tristate "MCA recovery from errors other than TLB."
499 bool "Performance monitor support"
501 Selects whether support for the IA-64 performance monitor hardware
502 is included in the kernel. This makes some kernel data-structures a
503 little bigger and slows down execution a bit, but it is generally
504 a good idea to turn this on. If you're unsure, say Y.
507 tristate "/proc/pal support"
509 If you say Y here, you are able to get PAL (Processor Abstraction
510 Layer) information in /proc/pal. This contains useful information
511 about the processors in your systems, such as cache and TLB sizes
512 and the PAL firmware version in use.
514 To use this option, you have to ensure that the "/proc file system
515 support" (CONFIG_PROC_FS) is enabled, too.
517 config IA64_MC_ERR_INJECT
518 tristate "MC error injection support"
520 Adds support for MC error injection. If enabled, the kernel
521 will provide a sysfs interface for user applications to
522 call MC error injection PAL procedures to inject various errors.
523 This is a useful tool for MCA testing.
525 If you're unsure, do not select this option.
528 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
531 bool "ESI (Extensible SAL Interface) support"
533 If you say Y here, support is built into the kernel to
534 make ESI calls. ESI calls are used to support vendor-specific
535 firmware extensions, such as the ability to inject memory-errors
536 for test-purposes. If you're unsure, say N.
538 config IA64_HP_AML_NFW
539 bool "Support ACPI AML calls to native firmware"
541 This driver installs a global ACPI Operation Region handler for
542 region 0xA1. AML methods can use this OpRegion to call arbitrary
543 native firmware functions. The driver installs the OpRegion
544 handler if there is an HPQ5001 device or if the user supplies
545 the "force" module parameter, e.g., with the "aml_nfw.force"
546 kernel command line option.
548 source "drivers/sn/Kconfig"
551 bool "kexec system call (EXPERIMENTAL)"
552 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
554 kexec is a system call that implements the ability to shutdown your
555 current kernel, and to start another kernel. It is like a reboot
556 but it is independent of the system firmware. And like a reboot
557 you can start any kernel with it, not just Linux.
559 The name comes from the similarity to the exec system call.
561 It is an ongoing process to be certain the hardware in a machine
562 is properly shutdown, so do not be surprised if this code does not
563 initially work for you. It may help to enable device hotplugging
564 support. As of this writing the exact hardware interface is
565 strongly in flux, so no good recommendation can be made.
568 bool "kernel crash dumps"
569 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
571 Generate crash dump after being started by kexec.
573 source "drivers/firmware/Kconfig"
575 source "fs/Kconfig.binfmt"
579 menu "Power management and ACPI"
581 source "kernel/power/Kconfig"
583 source "drivers/acpi/Kconfig"
587 source "arch/ia64/kernel/cpufreq/Kconfig"
595 menu "Bus options (PCI, PCMCIA)"
600 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
601 here unless you are using a simulator without PCI support.
609 source "drivers/pci/pcie/Kconfig"
611 source "drivers/pci/Kconfig"
613 source "drivers/pci/hotplug/Kconfig"
615 source "drivers/pcmcia/Kconfig"
623 source "drivers/Kconfig"
626 tristate "Memory special operations driver"
628 select IA64_UNCACHED_ALLOCATOR
630 If you have an ia64 and you want to enable memory special
631 operations support (formerly known as fetchop), say Y here,
636 source "arch/ia64/kvm/Kconfig"
641 # Use the generic interrupt handling code in kernel/irq/:
643 config GENERIC_HARDIRQS
647 config GENERIC_IRQ_PROBE
651 config GENERIC_PENDING_IRQ
653 depends on GENERIC_HARDIRQS && SMP
661 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
663 source "arch/ia64/hp/sim/Kconfig"
665 source "arch/ia64/Kconfig.debug"
667 source "security/Kconfig"
669 source "crypto/Kconfig"