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
230 Build a kernel that runs on Xen guest domain. At this moment only
231 16KB page size in supported.
236 prompt "Processor type"
242 Select your IA-64 processor type. The default is Itanium.
243 This choice is safe for all IA-64 systems, but may not perform
244 optimally on systems with, say, Itanium 2 or newer processors.
249 Select this to configure for an Itanium 2 (McKinley) processor.
254 prompt "Kernel page size"
255 default IA64_PAGE_SIZE_16KB
257 config IA64_PAGE_SIZE_4KB
260 This lets you select the page size of the kernel. For best IA-64
261 performance, a page size of 8KB or 16KB is recommended. For best
262 IA-32 compatibility, a page size of 4KB should be selected (the vast
263 majority of IA-32 binaries work perfectly fine with a larger page
264 size). For Itanium 2 or newer systems, a page size of 64KB can also
267 4KB For best IA-32 compatibility
268 8KB For best IA-64 performance
269 16KB For best IA-64 performance
270 64KB Requires Itanium 2 or newer processor.
272 If you don't know what to do, choose 16KB.
274 config IA64_PAGE_SIZE_8KB
277 config IA64_PAGE_SIZE_16KB
280 config IA64_PAGE_SIZE_64KB
287 prompt "Page Table Levels"
294 depends on !IA64_PAGE_SIZE_64KB
305 source kernel/Kconfig.hz
313 # align cache-sensitive data to 128 bytes
314 config IA64_L1_CACHE_SHIFT
316 default "7" if MCKINLEY
317 default "6" if ITANIUM
320 bool "Cyclone (EXA) Time Source support"
322 Say Y here to enable support for IBM EXA Cyclone time source.
323 If you're unsure, answer N.
327 depends on !IA64_HP_SIM
330 config FORCE_MAX_ZONEORDER
331 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
332 range 11 17 if !HUGETLB_PAGE
333 default "17" if HUGETLB_PAGE
336 config VIRT_CPU_ACCOUNTING
337 bool "Deterministic task and CPU time accounting"
340 Select this option to enable more accurate task and CPU time
341 accounting. This is done by reading a CPU counter on each
342 kernel entry and exit and on transitions within the kernel
343 between system, softirq and hardirq state, so there is a
344 small performance impact.
345 If in doubt, say N here.
348 bool "Symmetric multi-processing support"
349 select USE_GENERIC_SMP_HELPERS
351 This enables support for systems with more than one CPU. If you have
352 a system with only one CPU, say N. If you have a system with more
355 If you say N here, the kernel will run on single and multiprocessor
356 systems, but will use only one CPU of a multiprocessor system. If
357 you say Y here, the kernel will run on many, but not all,
358 single processor systems. On a single processor system, the kernel
359 will run faster if you say N here.
361 See also the SMP-HOWTO available at
362 <http://www.tldp.org/docs.html#howto>.
364 If you don't know what to do here, say N.
367 int "Maximum number of CPUs (2-4096)"
372 You should set this to the number of CPUs in your system, but
373 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
374 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
375 than 64 will cause the use of a CPU mask array, causing a small
379 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
380 depends on SMP && EXPERIMENTAL
384 Say Y here to experiment with turning CPUs off and on. CPUs
385 can be controlled through /sys/devices/system/cpu/cpu#.
386 Say N if you want to disable CPU hotplug.
388 config ARCH_ENABLE_MEMORY_HOTPLUG
391 config ARCH_ENABLE_MEMORY_HOTREMOVE
395 bool "SMT scheduler support"
398 Improves the CPU scheduler's decision making when dealing with
399 Intel IA64 chips with MultiThreading at a cost of slightly increased
400 overhead in some places. If unsure say N here.
402 config PERMIT_BSP_REMOVE
403 bool "Support removal of Bootstrap Processor"
404 depends on HOTPLUG_CPU
407 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
410 config FORCE_CPEI_RETARGET
411 bool "Force assumption that CPEI can be re-targetted"
412 depends on PERMIT_BSP_REMOVE
415 Say Y if you need to force the assumption that CPEI can be re-targetted to
416 any cpu in the system. This hint is available via ACPI 3.0 specifications.
417 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
418 This option it useful to enable this feature on older BIOS's as well.
419 You can also enable this by using boot command line option force_cpei=1.
421 source "kernel/Kconfig.preempt"
425 config ARCH_SELECT_MEMORY_MODEL
428 config ARCH_DISCONTIGMEM_ENABLE
431 Say Y to support efficient handling of discontiguous physical memory,
432 for architectures which are either NUMA (Non-Uniform Memory Access)
433 or have huge holes in the physical address space for other reasons.
434 See <file:Documentation/vm/numa> for more.
436 config ARCH_FLATMEM_ENABLE
439 config ARCH_SPARSEMEM_ENABLE
441 depends on ARCH_DISCONTIGMEM_ENABLE
442 select SPARSEMEM_VMEMMAP_ENABLE
444 config ARCH_DISCONTIGMEM_DEFAULT
445 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
446 depends on ARCH_DISCONTIGMEM_ENABLE
450 depends on !IA64_HP_SIM && !FLATMEM
451 default y if IA64_SGI_SN2
452 select ACPI_NUMA if ACPI
454 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
455 Access). This option is for configuring high-end multiprocessor
456 server systems. If in doubt, say N.
459 int "Max num nodes shift(3-10)"
462 depends on NEED_MULTIPLE_NODES
464 This option specifies the maximum number of nodes in your SSI system.
465 MAX_NUMNODES will be 2^(This value).
466 If in doubt, use the default.
468 config ARCH_POPULATES_NODE_MAP
471 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
472 # VIRTUAL_MEM_MAP has been retained for historical reasons.
473 config VIRTUAL_MEM_MAP
474 bool "Virtual mem map"
475 depends on !SPARSEMEM
476 default y if !IA64_HP_SIM
478 Say Y to compile the kernel with support for a virtual mem map.
479 This code also only takes effect if a memory hole of greater than
480 1 Gb is found during boot. You must turn this option on if you
481 require the DISCONTIGMEM option for your machine. If you are
486 default y if VIRTUAL_MEM_MAP
488 config HAVE_ARCH_EARLY_PFN_TO_NID
489 def_bool NUMA && SPARSEMEM
491 config HAVE_ARCH_NODEDATA_EXTENSION
496 bool "Support for Linux/x86 binaries"
498 IA-64 processors can execute IA-32 (X86) instructions. By
499 saying Y here, the kernel will include IA-32 system call
500 emulation support which makes it possible to transparently
501 run IA-32 Linux binaries on an IA-64 Linux system.
506 depends on IA32_SUPPORT
509 config COMPAT_FOR_U64_ALIGNMENT
512 config IA64_MCA_RECOVERY
513 tristate "MCA recovery from errors other than TLB."
516 bool "Performance monitor support"
518 Selects whether support for the IA-64 performance monitor hardware
519 is included in the kernel. This makes some kernel data-structures a
520 little bigger and slows down execution a bit, but it is generally
521 a good idea to turn this on. If you're unsure, say Y.
524 tristate "/proc/pal support"
526 If you say Y here, you are able to get PAL (Processor Abstraction
527 Layer) information in /proc/pal. This contains useful information
528 about the processors in your systems, such as cache and TLB sizes
529 and the PAL firmware version in use.
531 To use this option, you have to ensure that the "/proc file system
532 support" (CONFIG_PROC_FS) is enabled, too.
534 config IA64_MC_ERR_INJECT
535 tristate "MC error injection support"
537 Adds support for MC error injection. If enabled, the kernel
538 will provide a sysfs interface for user applications to
539 call MC error injection PAL procedures to inject various errors.
540 This is a useful tool for MCA testing.
542 If you're unsure, do not select this option.
545 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
548 bool "ESI (Extensible SAL Interface) support"
550 If you say Y here, support is built into the kernel to
551 make ESI calls. ESI calls are used to support vendor-specific
552 firmware extensions, such as the ability to inject memory-errors
553 for test-purposes. If you're unsure, say N.
555 config IA64_HP_AML_NFW
556 bool "Support ACPI AML calls to native firmware"
558 This driver installs a global ACPI Operation Region handler for
559 region 0xA1. AML methods can use this OpRegion to call arbitrary
560 native firmware functions. The driver installs the OpRegion
561 handler if there is an HPQ5001 device or if the user supplies
562 the "force" module parameter, e.g., with the "aml_nfw.force"
563 kernel command line option.
565 source "drivers/sn/Kconfig"
568 bool "kexec system call (EXPERIMENTAL)"
569 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
571 kexec is a system call that implements the ability to shutdown your
572 current kernel, and to start another kernel. It is like a reboot
573 but it is independent of the system firmware. And like a reboot
574 you can start any kernel with it, not just Linux.
576 The name comes from the similarity to the exec system call.
578 It is an ongoing process to be certain the hardware in a machine
579 is properly shutdown, so do not be surprised if this code does not
580 initially work for you. It may help to enable device hotplugging
581 support. As of this writing the exact hardware interface is
582 strongly in flux, so no good recommendation can be made.
585 bool "kernel crash dumps"
586 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
588 Generate crash dump after being started by kexec.
590 source "drivers/firmware/Kconfig"
592 source "fs/Kconfig.binfmt"
596 menu "Power management and ACPI options"
598 source "kernel/power/Kconfig"
600 source "drivers/acpi/Kconfig"
604 source "arch/ia64/kernel/cpufreq/Kconfig"
612 menu "Bus options (PCI, PCMCIA)"
617 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
618 here unless you are using a simulator without PCI support.
626 source "drivers/pci/pcie/Kconfig"
628 source "drivers/pci/Kconfig"
630 source "drivers/pci/hotplug/Kconfig"
632 source "drivers/pcmcia/Kconfig"
635 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
636 depends on IA64_GENERIC && ACPI && EXPERIMENTAL
638 DMA remapping (DMAR) devices support enables independent address
639 translations for Direct Memory Access (DMA) from devices.
640 These DMA remapping devices are reported via ACPI tables
641 and include PCI device scope covered by these DMA
644 config DMAR_DEFAULT_ON
646 prompt "Enable DMA Remapping Devices by default"
649 Selecting this option will enable a DMAR device at boot time if
650 one is found. If this option is not selected, DMAR support can
651 be enabled by passing intel_iommu=on to the kernel. It is
652 recommended you say N here while the DMAR code remains
661 source "drivers/Kconfig"
663 source "arch/ia64/hp/sim/Kconfig"
666 tristate "Memory special operations driver"
668 select IA64_UNCACHED_ALLOCATOR
670 If you have an ia64 and you want to enable memory special
671 operations support (formerly known as fetchop), say Y here,
676 source "arch/ia64/Kconfig.debug"
678 source "security/Kconfig"
680 source "crypto/Kconfig"
682 source "arch/ia64/kvm/Kconfig"
687 # Use the generic interrupt handling code in kernel/irq/:
689 config GENERIC_HARDIRQS
693 config GENERIC_IRQ_PROBE
697 config GENERIC_PENDING_IRQ
699 depends on GENERIC_HARDIRQS && SMP
707 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)