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
23 select HAVE_KRETPROBES
26 select HAVE_ARCH_TRACEHOOK
29 The Itanium Processor Family is Intel's 64-bit successor to
30 the 32-bit X86 line. The IA-64 Linux project has a home
31 page at <http://www.linuxia64.org/> and a mailing list at
32 <linux-ia64@vger.kernel.org>.
36 select ATA_NONSTANDARD if ATA
41 depends on !IA64_SGI_SN2
57 config GENERIC_LOCKBREAK
60 depends on SMP && PREEMPT
62 config RWSEM_XCHGADD_ALGORITHM
66 config HUGETLB_PAGE_SIZE_VARIABLE
68 depends on HUGETLB_PAGE
71 config GENERIC_FIND_NEXT_BIT
75 config GENERIC_CALIBRATE_DELAY
83 config GENERIC_TIME_VSYSCALL
87 config HAVE_SETUP_PER_CPU_AREA
102 config SCHED_NO_NO_OMIT_FRAME_POINTER
106 config IA64_UNCACHED_ALLOCATOR
108 select GENERIC_ALLOCATOR
114 menuconfig PARAVIRT_GUEST
115 bool "Paravirtualized guest support"
117 Say Y here to get to see options related to running Linux under
118 various hypervisors. This option alone does not add any kernel code.
120 If you say N, all options in this submenu will be skipped and disabled.
125 bool "Enable paravirtualization code"
126 depends on PARAVIRT_GUEST
131 This changes the kernel so it can modify itself when it is run
132 under a hypervisor, potentially improving performance significantly
133 over full virtualization. However, when run without a hypervisor
134 the kernel is theoretically slower and slightly larger.
137 source "arch/ia64/xen/Kconfig"
152 This selects the system type of your hardware. A "generic" kernel
153 will run on any supported IA-64 system. However, if you configure
154 a kernel for your specific system, it will be faster and smaller.
156 generic For any supported IA-64 system
157 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
158 DIG+Intel+IOMMU For DIG systems with Intel IOMMU
159 HP-zx1/sx1000 For HP systems
160 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
161 SGI-SN2 For SGI Altix systems
162 SGI-UV For SGI UV systems
163 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
164 Xen-domU For xen domU system
166 If you don't know what to do, choose "generic".
173 bool "DIG+Intel+IOMMU"
180 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
181 support for the HP I/O MMU.
183 config IA64_HP_ZX1_SWIOTLB
184 bool "HP-zx1/sx1000 with software I/O TLB"
187 Build a kernel that runs on HP zx1 and sx1000 systems even when they
188 have broken PCI devices which cannot DMA to full 32 bits. Apart
189 from support for the HP I/O MMU, this includes support for the software
190 I/O TLB, which allows supporting the broken devices at the expense of
191 wasting some kernel memory (about 2MB by default).
198 Selecting this option will optimize the kernel for use on sn2 based
199 systems, but the resulting kernel binary will not run on other
200 types of ia64 systems. If you have an SGI Altix system, it's safe
201 to select this option. If in doubt, select ia64 generic support
210 Selecting this option will optimize the kernel for use on UV based
211 systems, but the resulting kernel binary will not run on other
212 types of ia64 systems. If you have an SGI UV system, it's safe
213 to select this option. If in doubt, select ia64 generic support
220 config IA64_XEN_GUEST
227 prompt "Processor type"
233 Select your IA-64 processor type. The default is Itanium.
234 This choice is safe for all IA-64 systems, but may not perform
235 optimally on systems with, say, Itanium 2 or newer processors.
240 Select this to configure for an Itanium 2 (McKinley) processor.
245 prompt "Kernel page size"
246 default IA64_PAGE_SIZE_16KB
248 config IA64_PAGE_SIZE_4KB
251 This lets you select the page size of the kernel. For best IA-64
252 performance, a page size of 8KB or 16KB is recommended. For best
253 IA-32 compatibility, a page size of 4KB should be selected (the vast
254 majority of IA-32 binaries work perfectly fine with a larger page
255 size). For Itanium 2 or newer systems, a page size of 64KB can also
258 4KB For best IA-32 compatibility
259 8KB For best IA-64 performance
260 16KB For best IA-64 performance
261 64KB Requires Itanium 2 or newer processor.
263 If you don't know what to do, choose 16KB.
265 config IA64_PAGE_SIZE_8KB
268 config IA64_PAGE_SIZE_16KB
271 config IA64_PAGE_SIZE_64KB
278 prompt "Page Table Levels"
285 depends on !IA64_PAGE_SIZE_64KB
296 source kernel/Kconfig.hz
304 # align cache-sensitive data to 128 bytes
305 config IA64_L1_CACHE_SHIFT
307 default "7" if MCKINLEY
308 default "6" if ITANIUM
311 bool "Cyclone (EXA) Time Source support"
313 Say Y here to enable support for IBM EXA Cyclone time source.
314 If you're unsure, answer N.
318 depends on !IA64_HP_SIM
321 config FORCE_MAX_ZONEORDER
322 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
323 range 11 17 if !HUGETLB_PAGE
324 default "17" if HUGETLB_PAGE
327 config VIRT_CPU_ACCOUNTING
328 bool "Deterministic task and CPU time accounting"
331 Select this option to enable more accurate task and CPU time
332 accounting. This is done by reading a CPU counter on each
333 kernel entry and exit and on transitions within the kernel
334 between system, softirq and hardirq state, so there is a
335 small performance impact.
336 If in doubt, say N here.
339 bool "Symmetric multi-processing support"
340 select USE_GENERIC_SMP_HELPERS
342 This enables support for systems with more than one CPU. If you have
343 a system with only one CPU, say N. If you have a system with more
346 If you say N here, the kernel will run on single and multiprocessor
347 systems, but will use only one CPU of a multiprocessor system. If
348 you say Y here, the kernel will run on many, but not all,
349 single processor systems. On a single processor system, the kernel
350 will run faster if you say N here.
352 See also the SMP-HOWTO available at
353 <http://www.tldp.org/docs.html#howto>.
355 If you don't know what to do here, say N.
358 int "Maximum number of CPUs (2-4096)"
363 You should set this to the number of CPUs in your system, but
364 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
365 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
366 than 64 will cause the use of a CPU mask array, causing a small
370 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
371 depends on SMP && EXPERIMENTAL
375 Say Y here to experiment with turning CPUs off and on. CPUs
376 can be controlled through /sys/devices/system/cpu/cpu#.
377 Say N if you want to disable CPU hotplug.
379 config ARCH_ENABLE_MEMORY_HOTPLUG
382 config ARCH_ENABLE_MEMORY_HOTREMOVE
386 bool "SMT scheduler support"
389 Improves the CPU scheduler's decision making when dealing with
390 Intel IA64 chips with MultiThreading at a cost of slightly increased
391 overhead in some places. If unsure say N here.
393 config PERMIT_BSP_REMOVE
394 bool "Support removal of Bootstrap Processor"
395 depends on HOTPLUG_CPU
398 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
401 config FORCE_CPEI_RETARGET
402 bool "Force assumption that CPEI can be re-targetted"
403 depends on PERMIT_BSP_REMOVE
406 Say Y if you need to force the assumption that CPEI can be re-targetted to
407 any cpu in the system. This hint is available via ACPI 3.0 specifications.
408 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
409 This option it useful to enable this feature on older BIOS's as well.
410 You can also enable this by using boot command line option force_cpei=1.
412 source "kernel/Kconfig.preempt"
416 config ARCH_SELECT_MEMORY_MODEL
419 config ARCH_DISCONTIGMEM_ENABLE
422 Say Y to support efficient handling of discontiguous physical memory,
423 for architectures which are either NUMA (Non-Uniform Memory Access)
424 or have huge holes in the physical address space for other reasons.
425 See <file:Documentation/vm/numa> for more.
427 config ARCH_FLATMEM_ENABLE
430 config ARCH_SPARSEMEM_ENABLE
432 depends on ARCH_DISCONTIGMEM_ENABLE
433 select SPARSEMEM_VMEMMAP_ENABLE
435 config ARCH_DISCONTIGMEM_DEFAULT
436 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
437 depends on ARCH_DISCONTIGMEM_ENABLE
441 depends on !IA64_HP_SIM && !FLATMEM
442 default y if IA64_SGI_SN2
443 select ACPI_NUMA if ACPI
445 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
446 Access). This option is for configuring high-end multiprocessor
447 server systems. If in doubt, say N.
450 int "Max num nodes shift(3-10)"
453 depends on NEED_MULTIPLE_NODES
455 This option specifies the maximum number of nodes in your SSI system.
456 MAX_NUMNODES will be 2^(This value).
457 If in doubt, use the default.
459 config ARCH_POPULATES_NODE_MAP
462 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
463 # VIRTUAL_MEM_MAP has been retained for historical reasons.
464 config VIRTUAL_MEM_MAP
465 bool "Virtual mem map"
466 depends on !SPARSEMEM
467 default y if !IA64_HP_SIM
469 Say Y to compile the kernel with support for a virtual mem map.
470 This code also only takes effect if a memory hole of greater than
471 1 Gb is found during boot. You must turn this option on if you
472 require the DISCONTIGMEM option for your machine. If you are
477 default y if VIRTUAL_MEM_MAP
479 config HAVE_ARCH_EARLY_PFN_TO_NID
481 depends on NEED_MULTIPLE_NODES
483 config HAVE_ARCH_NODEDATA_EXTENSION
488 bool "Support for Linux/x86 binaries"
490 IA-64 processors can execute IA-32 (X86) instructions. By
491 saying Y here, the kernel will include IA-32 system call
492 emulation support which makes it possible to transparently
493 run IA-32 Linux binaries on an IA-64 Linux system.
498 depends on IA32_SUPPORT
501 config COMPAT_FOR_U64_ALIGNMENT
504 config IA64_MCA_RECOVERY
505 tristate "MCA recovery from errors other than TLB."
508 bool "Performance monitor support"
510 Selects whether support for the IA-64 performance monitor hardware
511 is included in the kernel. This makes some kernel data-structures a
512 little bigger and slows down execution a bit, but it is generally
513 a good idea to turn this on. If you're unsure, say Y.
516 tristate "/proc/pal support"
518 If you say Y here, you are able to get PAL (Processor Abstraction
519 Layer) information in /proc/pal. This contains useful information
520 about the processors in your systems, such as cache and TLB sizes
521 and the PAL firmware version in use.
523 To use this option, you have to ensure that the "/proc file system
524 support" (CONFIG_PROC_FS) is enabled, too.
526 config IA64_MC_ERR_INJECT
527 tristate "MC error injection support"
529 Adds support for MC error injection. If enabled, the kernel
530 will provide a sysfs interface for user applications to
531 call MC error injection PAL procedures to inject various errors.
532 This is a useful tool for MCA testing.
534 If you're unsure, do not select this option.
537 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
540 bool "ESI (Extensible SAL Interface) support"
542 If you say Y here, support is built into the kernel to
543 make ESI calls. ESI calls are used to support vendor-specific
544 firmware extensions, such as the ability to inject memory-errors
545 for test-purposes. If you're unsure, say N.
547 config IA64_HP_AML_NFW
548 bool "Support ACPI AML calls to native firmware"
550 This driver installs a global ACPI Operation Region handler for
551 region 0xA1. AML methods can use this OpRegion to call arbitrary
552 native firmware functions. The driver installs the OpRegion
553 handler if there is an HPQ5001 device or if the user supplies
554 the "force" module parameter, e.g., with the "aml_nfw.force"
555 kernel command line option.
557 source "drivers/sn/Kconfig"
560 bool "kexec system call (EXPERIMENTAL)"
561 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
563 kexec is a system call that implements the ability to shutdown your
564 current kernel, and to start another kernel. It is like a reboot
565 but it is independent of the system firmware. And like a reboot
566 you can start any kernel with it, not just Linux.
568 The name comes from the similarity to the exec system call.
570 It is an ongoing process to be certain the hardware in a machine
571 is properly shutdown, so do not be surprised if this code does not
572 initially work for you. It may help to enable device hotplugging
573 support. As of this writing the exact hardware interface is
574 strongly in flux, so no good recommendation can be made.
577 bool "kernel crash dumps"
578 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
580 Generate crash dump after being started by kexec.
582 source "drivers/firmware/Kconfig"
584 source "fs/Kconfig.binfmt"
588 menu "Power management and ACPI"
590 source "kernel/power/Kconfig"
592 source "drivers/acpi/Kconfig"
596 source "arch/ia64/kernel/cpufreq/Kconfig"
604 menu "Bus options (PCI, PCMCIA)"
609 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
610 here unless you are using a simulator without PCI support.
618 source "drivers/pci/pcie/Kconfig"
620 source "drivers/pci/Kconfig"
622 source "drivers/pci/hotplug/Kconfig"
624 source "drivers/pcmcia/Kconfig"
627 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
628 depends on IA64_GENERIC && ACPI && EXPERIMENTAL
630 DMA remapping (DMAR) devices support enables independent address
631 translations for Direct Memory Access (DMA) from devices.
632 These DMA remapping devices are reported via ACPI tables
633 and include PCI device scope covered by these DMA
642 source "drivers/Kconfig"
645 tristate "Memory special operations driver"
647 select IA64_UNCACHED_ALLOCATOR
649 If you have an ia64 and you want to enable memory special
650 operations support (formerly known as fetchop), say Y here,
655 source "arch/ia64/kvm/Kconfig"
660 # Use the generic interrupt handling code in kernel/irq/:
662 config GENERIC_HARDIRQS
666 config GENERIC_IRQ_PROBE
670 config GENERIC_PENDING_IRQ
672 depends on GENERIC_HARDIRQS && SMP
680 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)
682 source "arch/ia64/hp/sim/Kconfig"
684 source "arch/ia64/Kconfig.debug"
686 source "security/Kconfig"
688 source "crypto/Kconfig"