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
27 select HAVE_ARCH_TRACEHOOK
30 The Itanium Processor Family is Intel's 64-bit successor to
31 the 32-bit X86 line. The IA-64 Linux project has a home
32 page at <http://www.linuxia64.org/> and a mailing list at
33 <linux-ia64@vger.kernel.org>.
37 select ATA_NONSTANDARD if ATA
42 depends on !IA64_SGI_SN2
58 config GENERIC_LOCKBREAK
61 depends on SMP && PREEMPT
63 config RWSEM_XCHGADD_ALGORITHM
67 config HUGETLB_PAGE_SIZE_VARIABLE
69 depends on HUGETLB_PAGE
72 config GENERIC_FIND_NEXT_BIT
76 config GENERIC_CALIBRATE_DELAY
84 config GENERIC_TIME_VSYSCALL
88 config HAVE_SETUP_PER_CPU_AREA
103 config SCHED_OMIT_FRAME_POINTER
107 config IA64_UNCACHED_ALLOCATOR
109 select GENERIC_ALLOCATOR
115 menuconfig PARAVIRT_GUEST
116 bool "Paravirtualized guest support"
118 Say Y here to get to see options related to running Linux under
119 various hypervisors. This option alone does not add any kernel code.
121 If you say N, all options in this submenu will be skipped and disabled.
126 bool "Enable paravirtualization code"
127 depends on PARAVIRT_GUEST
132 This changes the kernel so it can modify itself when it is run
133 under a hypervisor, potentially improving performance significantly
134 over full virtualization. However, when run without a hypervisor
135 the kernel is theoretically slower and slightly larger.
138 source "arch/ia64/xen/Kconfig"
154 This selects the system type of your hardware. A "generic" kernel
155 will run on any supported IA-64 system. However, if you configure
156 a kernel for your specific system, it will be faster and smaller.
158 generic For any supported IA-64 system
159 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
160 DIG+Intel+IOMMU For DIG systems with Intel IOMMU
161 HP-zx1/sx1000 For HP systems
162 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
163 SGI-SN2 For SGI Altix systems
164 SGI-UV For SGI UV systems
165 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
166 Xen-domU For xen domU system
168 If you don't know what to do, choose "generic".
175 bool "DIG+Intel+IOMMU"
182 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
183 support for the HP I/O MMU.
185 config IA64_HP_ZX1_SWIOTLB
186 bool "HP-zx1/sx1000 with software I/O TLB"
189 Build a kernel that runs on HP zx1 and sx1000 systems even when they
190 have broken PCI devices which cannot DMA to full 32 bits. Apart
191 from support for the HP I/O MMU, this includes support for the software
192 I/O TLB, which allows supporting the broken devices at the expense of
193 wasting some kernel memory (about 2MB by default).
200 Selecting this option will optimize the kernel for use on sn2 based
201 systems, but the resulting kernel binary will not run on other
202 types of ia64 systems. If you have an SGI Altix system, it's safe
203 to select this option. If in doubt, select ia64 generic support
212 Selecting this option will optimize the kernel for use on UV based
213 systems, but the resulting kernel binary will not run on other
214 types of ia64 systems. If you have an SGI UV system, it's safe
215 to select this option. If in doubt, select ia64 generic support
222 config IA64_XEN_GUEST
227 Build a kernel that runs on Xen guest domain. At this moment only
228 16KB page size in supported.
233 prompt "Processor type"
239 Select your IA-64 processor type. The default is Itanium.
240 This choice is safe for all IA-64 systems, but may not perform
241 optimally on systems with, say, Itanium 2 or newer processors.
246 Select this to configure for an Itanium 2 (McKinley) processor.
251 prompt "Kernel page size"
252 default IA64_PAGE_SIZE_16KB
254 config IA64_PAGE_SIZE_4KB
257 This lets you select the page size of the kernel. For best IA-64
258 performance, a page size of 8KB or 16KB is recommended. For best
259 IA-32 compatibility, a page size of 4KB should be selected (the vast
260 majority of IA-32 binaries work perfectly fine with a larger page
261 size). For Itanium 2 or newer systems, a page size of 64KB can also
264 4KB For best IA-32 compatibility
265 8KB For best IA-64 performance
266 16KB For best IA-64 performance
267 64KB Requires Itanium 2 or newer processor.
269 If you don't know what to do, choose 16KB.
271 config IA64_PAGE_SIZE_8KB
274 config IA64_PAGE_SIZE_16KB
277 config IA64_PAGE_SIZE_64KB
284 prompt "Page Table Levels"
291 depends on !IA64_PAGE_SIZE_64KB
302 source kernel/Kconfig.hz
310 # align cache-sensitive data to 128 bytes
311 config IA64_L1_CACHE_SHIFT
313 default "7" if MCKINLEY
314 default "6" if ITANIUM
317 bool "Cyclone (EXA) Time Source support"
319 Say Y here to enable support for IBM EXA Cyclone time source.
320 If you're unsure, answer N.
324 depends on !IA64_HP_SIM
327 config FORCE_MAX_ZONEORDER
328 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
329 range 11 17 if !HUGETLB_PAGE
330 default "17" if HUGETLB_PAGE
333 config VIRT_CPU_ACCOUNTING
334 bool "Deterministic task and CPU time accounting"
337 Select this option to enable more accurate task and CPU time
338 accounting. This is done by reading a CPU counter on each
339 kernel entry and exit and on transitions within the kernel
340 between system, softirq and hardirq state, so there is a
341 small performance impact.
342 If in doubt, say N here.
345 bool "Symmetric multi-processing support"
346 select USE_GENERIC_SMP_HELPERS
348 This enables support for systems with more than one CPU. If you have
349 a system with only one CPU, say N. If you have a system with more
352 If you say N here, the kernel will run on single and multiprocessor
353 systems, but will use only one CPU of a multiprocessor system. If
354 you say Y here, the kernel will run on many, but not all,
355 single processor systems. On a single processor system, the kernel
356 will run faster if you say N here.
358 See also the SMP-HOWTO available at
359 <http://www.tldp.org/docs.html#howto>.
361 If you don't know what to do here, say N.
364 int "Maximum number of CPUs (2-4096)"
369 You should set this to the number of CPUs in your system, but
370 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
371 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
372 than 64 will cause the use of a CPU mask array, causing a small
376 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
377 depends on SMP && EXPERIMENTAL
381 Say Y here to experiment with turning CPUs off and on. CPUs
382 can be controlled through /sys/devices/system/cpu/cpu#.
383 Say N if you want to disable CPU hotplug.
385 config ARCH_ENABLE_MEMORY_HOTPLUG
388 config ARCH_ENABLE_MEMORY_HOTREMOVE
392 bool "SMT scheduler support"
395 Improves the CPU scheduler's decision making when dealing with
396 Intel IA64 chips with MultiThreading at a cost of slightly increased
397 overhead in some places. If unsure say N here.
399 config PERMIT_BSP_REMOVE
400 bool "Support removal of Bootstrap Processor"
401 depends on HOTPLUG_CPU
404 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
407 config FORCE_CPEI_RETARGET
408 bool "Force assumption that CPEI can be re-targetted"
409 depends on PERMIT_BSP_REMOVE
412 Say Y if you need to force the assumption that CPEI can be re-targetted to
413 any cpu in the system. This hint is available via ACPI 3.0 specifications.
414 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
415 This option it useful to enable this feature on older BIOS's as well.
416 You can also enable this by using boot command line option force_cpei=1.
418 source "kernel/Kconfig.preempt"
422 config ARCH_SELECT_MEMORY_MODEL
425 config ARCH_DISCONTIGMEM_ENABLE
428 Say Y to support efficient handling of discontiguous physical memory,
429 for architectures which are either NUMA (Non-Uniform Memory Access)
430 or have huge holes in the physical address space for other reasons.
431 See <file:Documentation/vm/numa> for more.
433 config ARCH_FLATMEM_ENABLE
436 config ARCH_SPARSEMEM_ENABLE
438 depends on ARCH_DISCONTIGMEM_ENABLE
439 select SPARSEMEM_VMEMMAP_ENABLE
441 config ARCH_DISCONTIGMEM_DEFAULT
442 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
443 depends on ARCH_DISCONTIGMEM_ENABLE
447 depends on !IA64_HP_SIM && !FLATMEM
448 default y if IA64_SGI_SN2
449 select ACPI_NUMA if ACPI
451 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
452 Access). This option is for configuring high-end multiprocessor
453 server systems. If in doubt, say N.
456 int "Max num nodes shift(3-10)"
459 depends on NEED_MULTIPLE_NODES
461 This option specifies the maximum number of nodes in your SSI system.
462 MAX_NUMNODES will be 2^(This value).
463 If in doubt, use the default.
465 config ARCH_POPULATES_NODE_MAP
468 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
469 # VIRTUAL_MEM_MAP has been retained for historical reasons.
470 config VIRTUAL_MEM_MAP
471 bool "Virtual mem map"
472 depends on !SPARSEMEM
473 default y if !IA64_HP_SIM
475 Say Y to compile the kernel with support for a virtual mem map.
476 This code also only takes effect if a memory hole of greater than
477 1 Gb is found during boot. You must turn this option on if you
478 require the DISCONTIGMEM option for your machine. If you are
483 default y if VIRTUAL_MEM_MAP
485 config HAVE_ARCH_EARLY_PFN_TO_NID
486 def_bool NUMA && SPARSEMEM
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
641 config DMAR_DEFAULT_ON
643 prompt "Enable DMA Remapping Devices by default"
646 Selecting this option will enable a DMAR device at boot time if
647 one is found. If this option is not selected, DMAR support can
648 be enabled by passing intel_iommu=on to the kernel. It is
649 recommended you say N here while the DMAR code remains
658 source "drivers/Kconfig"
660 source "arch/ia64/hp/sim/Kconfig"
663 tristate "Memory special operations driver"
665 select IA64_UNCACHED_ALLOCATOR
667 If you have an ia64 and you want to enable memory special
668 operations support (formerly known as fetchop), say Y here,
673 source "arch/ia64/Kconfig.debug"
675 source "security/Kconfig"
677 source "crypto/Kconfig"
679 source "arch/ia64/kvm/Kconfig"
684 # Use the generic interrupt handling code in kernel/irq/:
686 config GENERIC_HARDIRQS
690 config GENERIC_IRQ_PROBE
694 config GENERIC_PENDING_IRQ
696 depends on GENERIC_HARDIRQS && SMP
704 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)