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 source "kernel/Kconfig.freezer"
12 menu "Processor type and features"
16 select PCI if (!IA64_HP_SIM)
17 select ACPI if (!IA64_HP_SIM)
18 select PM if (!IA64_HP_SIM)
19 select ARCH_SUPPORTS_MSI
20 select HAVE_UNSTABLE_SCHED_CLOCK
24 select HAVE_KRETPROBES
25 select HAVE_FTRACE_MCOUNT_RECORD
26 select HAVE_DYNAMIC_FTRACE if (!ITANIUM)
27 select HAVE_FUNCTION_TRACER
30 select HAVE_ARCH_TRACEHOOK
33 The Itanium Processor Family is Intel's 64-bit successor to
34 the 32-bit X86 line. The IA-64 Linux project has a home
35 page at <http://www.linuxia64.org/> and a mailing list at
36 <linux-ia64@vger.kernel.org>.
40 select ATA_NONSTANDARD if ATA
45 depends on !IA64_SGI_SN2
61 config GENERIC_LOCKBREAK
64 depends on SMP && PREEMPT
66 config RWSEM_XCHGADD_ALGORITHM
70 config HUGETLB_PAGE_SIZE_VARIABLE
72 depends on HUGETLB_PAGE
75 config GENERIC_FIND_NEXT_BIT
79 config GENERIC_CALIBRATE_DELAY
87 config GENERIC_TIME_VSYSCALL
91 config HAVE_SETUP_PER_CPU_AREA
106 config SCHED_OMIT_FRAME_POINTER
110 config IA64_UNCACHED_ALLOCATOR
112 select GENERIC_ALLOCATOR
118 menuconfig PARAVIRT_GUEST
119 bool "Paravirtualized guest support"
121 Say Y here to get to see options related to running Linux under
122 various hypervisors. This option alone does not add any kernel code.
124 If you say N, all options in this submenu will be skipped and disabled.
129 bool "Enable paravirtualization code"
130 depends on PARAVIRT_GUEST
135 This changes the kernel so it can modify itself when it is run
136 under a hypervisor, potentially improving performance significantly
137 over full virtualization. However, when run without a hypervisor
138 the kernel is theoretically slower and slightly larger.
141 source "arch/ia64/xen/Kconfig"
157 This selects the system type of your hardware. A "generic" kernel
158 will run on any supported IA-64 system. However, if you configure
159 a kernel for your specific system, it will be faster and smaller.
161 generic For any supported IA-64 system
162 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
163 DIG+Intel+IOMMU For DIG systems with Intel IOMMU
164 HP-zx1/sx1000 For HP systems
165 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
166 SGI-SN2 For SGI Altix systems
167 SGI-UV For SGI UV systems
168 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
169 Xen-domU For xen domU system
171 If you don't know what to do, choose "generic".
178 bool "DIG+Intel+IOMMU"
185 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
186 support for the HP I/O MMU.
188 config IA64_HP_ZX1_SWIOTLB
189 bool "HP-zx1/sx1000 with software I/O TLB"
192 Build a kernel that runs on HP zx1 and sx1000 systems even when they
193 have broken PCI devices which cannot DMA to full 32 bits. Apart
194 from support for the HP I/O MMU, this includes support for the software
195 I/O TLB, which allows supporting the broken devices at the expense of
196 wasting some kernel memory (about 2MB by default).
203 Selecting this option will optimize the kernel for use on sn2 based
204 systems, but the resulting kernel binary will not run on other
205 types of ia64 systems. If you have an SGI Altix system, it's safe
206 to select this option. If in doubt, select ia64 generic support
215 Selecting this option will optimize the kernel for use on UV based
216 systems, but the resulting kernel binary will not run on other
217 types of ia64 systems. If you have an SGI UV system, it's safe
218 to select this option. If in doubt, select ia64 generic support
225 config IA64_XEN_GUEST
232 prompt "Processor type"
238 Select your IA-64 processor type. The default is Itanium.
239 This choice is safe for all IA-64 systems, but may not perform
240 optimally on systems with, say, Itanium 2 or newer processors.
245 Select this to configure for an Itanium 2 (McKinley) processor.
250 prompt "Kernel page size"
251 default IA64_PAGE_SIZE_16KB
253 config IA64_PAGE_SIZE_4KB
256 This lets you select the page size of the kernel. For best IA-64
257 performance, a page size of 8KB or 16KB is recommended. For best
258 IA-32 compatibility, a page size of 4KB should be selected (the vast
259 majority of IA-32 binaries work perfectly fine with a larger page
260 size). For Itanium 2 or newer systems, a page size of 64KB can also
263 4KB For best IA-32 compatibility
264 8KB For best IA-64 performance
265 16KB For best IA-64 performance
266 64KB Requires Itanium 2 or newer processor.
268 If you don't know what to do, choose 16KB.
270 config IA64_PAGE_SIZE_8KB
273 config IA64_PAGE_SIZE_16KB
276 config IA64_PAGE_SIZE_64KB
283 prompt "Page Table Levels"
290 depends on !IA64_PAGE_SIZE_64KB
301 source kernel/Kconfig.hz
309 # align cache-sensitive data to 128 bytes
310 config IA64_L1_CACHE_SHIFT
312 default "7" if MCKINLEY
313 default "6" if ITANIUM
316 bool "Cyclone (EXA) Time Source support"
318 Say Y here to enable support for IBM EXA Cyclone time source.
319 If you're unsure, answer N.
323 depends on !IA64_HP_SIM
326 config FORCE_MAX_ZONEORDER
327 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
328 range 11 17 if !HUGETLB_PAGE
329 default "17" if HUGETLB_PAGE
332 config VIRT_CPU_ACCOUNTING
333 bool "Deterministic task and CPU time accounting"
336 Select this option to enable more accurate task and CPU time
337 accounting. This is done by reading a CPU counter on each
338 kernel entry and exit and on transitions within the kernel
339 between system, softirq and hardirq state, so there is a
340 small performance impact.
341 If in doubt, say N here.
344 bool "Symmetric multi-processing support"
345 select USE_GENERIC_SMP_HELPERS
347 This enables support for systems with more than one CPU. If you have
348 a system with only one CPU, say N. If you have a system with more
351 If you say N here, the kernel will run on single and multiprocessor
352 systems, but will use only one CPU of a multiprocessor system. If
353 you say Y here, the kernel will run on many, but not all,
354 single processor systems. On a single processor system, the kernel
355 will run faster if you say N here.
357 See also the SMP-HOWTO available at
358 <http://www.tldp.org/docs.html#howto>.
360 If you don't know what to do here, say N.
363 int "Maximum number of CPUs (2-4096)"
368 You should set this to the number of CPUs in your system, but
369 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
370 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
371 than 64 will cause the use of a CPU mask array, causing a small
375 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
376 depends on SMP && EXPERIMENTAL
380 Say Y here to experiment with turning CPUs off and on. CPUs
381 can be controlled through /sys/devices/system/cpu/cpu#.
382 Say N if you want to disable CPU hotplug.
384 config ARCH_ENABLE_MEMORY_HOTPLUG
387 config ARCH_ENABLE_MEMORY_HOTREMOVE
391 bool "SMT scheduler support"
394 Improves the CPU scheduler's decision making when dealing with
395 Intel IA64 chips with MultiThreading at a cost of slightly increased
396 overhead in some places. If unsure say N here.
398 config PERMIT_BSP_REMOVE
399 bool "Support removal of Bootstrap Processor"
400 depends on HOTPLUG_CPU
403 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
406 config FORCE_CPEI_RETARGET
407 bool "Force assumption that CPEI can be re-targetted"
408 depends on PERMIT_BSP_REMOVE
411 Say Y if you need to force the assumption that CPEI can be re-targetted to
412 any cpu in the system. This hint is available via ACPI 3.0 specifications.
413 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
414 This option it useful to enable this feature on older BIOS's as well.
415 You can also enable this by using boot command line option force_cpei=1.
417 source "kernel/Kconfig.preempt"
421 config ARCH_SELECT_MEMORY_MODEL
424 config ARCH_DISCONTIGMEM_ENABLE
427 Say Y to support efficient handling of discontiguous physical memory,
428 for architectures which are either NUMA (Non-Uniform Memory Access)
429 or have huge holes in the physical address space for other reasons.
430 See <file:Documentation/vm/numa> for more.
432 config ARCH_FLATMEM_ENABLE
435 config ARCH_SPARSEMEM_ENABLE
437 depends on ARCH_DISCONTIGMEM_ENABLE
438 select SPARSEMEM_VMEMMAP_ENABLE
440 config ARCH_DISCONTIGMEM_DEFAULT
441 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
442 depends on ARCH_DISCONTIGMEM_ENABLE
446 depends on !IA64_HP_SIM && !FLATMEM
447 default y if IA64_SGI_SN2
448 select ACPI_NUMA if ACPI
450 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
451 Access). This option is for configuring high-end multiprocessor
452 server systems. If in doubt, say N.
455 int "Max num nodes shift(3-10)"
458 depends on NEED_MULTIPLE_NODES
460 This option specifies the maximum number of nodes in your SSI system.
461 MAX_NUMNODES will be 2^(This value).
462 If in doubt, use the default.
464 config ARCH_POPULATES_NODE_MAP
467 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
468 # VIRTUAL_MEM_MAP has been retained for historical reasons.
469 config VIRTUAL_MEM_MAP
470 bool "Virtual mem map"
471 depends on !SPARSEMEM
472 default y if !IA64_HP_SIM
474 Say Y to compile the kernel with support for a virtual mem map.
475 This code also only takes effect if a memory hole of greater than
476 1 Gb is found during boot. You must turn this option on if you
477 require the DISCONTIGMEM option for your machine. If you are
482 default y if VIRTUAL_MEM_MAP
484 config HAVE_ARCH_EARLY_PFN_TO_NID
486 depends on NEED_MULTIPLE_NODES
488 config HAVE_ARCH_NODEDATA_EXTENSION
493 bool "Support for Linux/x86 binaries"
495 IA-64 processors can execute IA-32 (X86) instructions. By
496 saying Y here, the kernel will include IA-32 system call
497 emulation support which makes it possible to transparently
498 run IA-32 Linux binaries on an IA-64 Linux system.
503 depends on IA32_SUPPORT
506 config COMPAT_FOR_U64_ALIGNMENT
509 config IA64_MCA_RECOVERY
510 tristate "MCA recovery from errors other than TLB."
513 bool "Performance monitor support"
515 Selects whether support for the IA-64 performance monitor hardware
516 is included in the kernel. This makes some kernel data-structures a
517 little bigger and slows down execution a bit, but it is generally
518 a good idea to turn this on. If you're unsure, say Y.
521 tristate "/proc/pal support"
523 If you say Y here, you are able to get PAL (Processor Abstraction
524 Layer) information in /proc/pal. This contains useful information
525 about the processors in your systems, such as cache and TLB sizes
526 and the PAL firmware version in use.
528 To use this option, you have to ensure that the "/proc file system
529 support" (CONFIG_PROC_FS) is enabled, too.
531 config IA64_MC_ERR_INJECT
532 tristate "MC error injection support"
534 Adds support for MC error injection. If enabled, the kernel
535 will provide a sysfs interface for user applications to
536 call MC error injection PAL procedures to inject various errors.
537 This is a useful tool for MCA testing.
539 If you're unsure, do not select this option.
542 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
545 bool "ESI (Extensible SAL Interface) support"
547 If you say Y here, support is built into the kernel to
548 make ESI calls. ESI calls are used to support vendor-specific
549 firmware extensions, such as the ability to inject memory-errors
550 for test-purposes. If you're unsure, say N.
552 config IA64_HP_AML_NFW
553 bool "Support ACPI AML calls to native firmware"
555 This driver installs a global ACPI Operation Region handler for
556 region 0xA1. AML methods can use this OpRegion to call arbitrary
557 native firmware functions. The driver installs the OpRegion
558 handler if there is an HPQ5001 device or if the user supplies
559 the "force" module parameter, e.g., with the "aml_nfw.force"
560 kernel command line option.
562 source "drivers/sn/Kconfig"
565 bool "kexec system call (EXPERIMENTAL)"
566 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
568 kexec is a system call that implements the ability to shutdown your
569 current kernel, and to start another kernel. It is like a reboot
570 but it is independent of the system firmware. And like a reboot
571 you can start any kernel with it, not just Linux.
573 The name comes from the similarity to the exec system call.
575 It is an ongoing process to be certain the hardware in a machine
576 is properly shutdown, so do not be surprised if this code does not
577 initially work for you. It may help to enable device hotplugging
578 support. As of this writing the exact hardware interface is
579 strongly in flux, so no good recommendation can be made.
582 bool "kernel crash dumps"
583 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
585 Generate crash dump after being started by kexec.
587 source "drivers/firmware/Kconfig"
589 source "fs/Kconfig.binfmt"
593 menu "Power management and ACPI options"
595 source "kernel/power/Kconfig"
597 source "drivers/acpi/Kconfig"
601 source "arch/ia64/kernel/cpufreq/Kconfig"
609 menu "Bus options (PCI, PCMCIA)"
614 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
615 here unless you are using a simulator without PCI support.
623 source "drivers/pci/pcie/Kconfig"
625 source "drivers/pci/Kconfig"
627 source "drivers/pci/hotplug/Kconfig"
629 source "drivers/pcmcia/Kconfig"
632 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
633 depends on IA64_GENERIC && ACPI && EXPERIMENTAL
635 DMA remapping (DMAR) devices support enables independent address
636 translations for Direct Memory Access (DMA) from devices.
637 These DMA remapping devices are reported via ACPI tables
638 and include PCI device scope covered by these DMA
647 source "drivers/Kconfig"
649 source "arch/ia64/hp/sim/Kconfig"
652 tristate "Memory special operations driver"
654 select IA64_UNCACHED_ALLOCATOR
656 If you have an ia64 and you want to enable memory special
657 operations support (formerly known as fetchop), say Y here,
662 source "arch/ia64/Kconfig.debug"
664 source "security/Kconfig"
666 source "crypto/Kconfig"
668 source "arch/ia64/kvm/Kconfig"
673 # Use the generic interrupt handling code in kernel/irq/:
675 config GENERIC_HARDIRQS
679 config GENERIC_IRQ_PROBE
683 config GENERIC_PENDING_IRQ
685 depends on GENERIC_HARDIRQS && SMP
693 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)