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
229 prompt "Processor type"
235 Select your IA-64 processor type. The default is Itanium.
236 This choice is safe for all IA-64 systems, but may not perform
237 optimally on systems with, say, Itanium 2 or newer processors.
242 Select this to configure for an Itanium 2 (McKinley) processor.
247 prompt "Kernel page size"
248 default IA64_PAGE_SIZE_16KB
250 config IA64_PAGE_SIZE_4KB
253 This lets you select the page size of the kernel. For best IA-64
254 performance, a page size of 8KB or 16KB is recommended. For best
255 IA-32 compatibility, a page size of 4KB should be selected (the vast
256 majority of IA-32 binaries work perfectly fine with a larger page
257 size). For Itanium 2 or newer systems, a page size of 64KB can also
260 4KB For best IA-32 compatibility
261 8KB For best IA-64 performance
262 16KB For best IA-64 performance
263 64KB Requires Itanium 2 or newer processor.
265 If you don't know what to do, choose 16KB.
267 config IA64_PAGE_SIZE_8KB
270 config IA64_PAGE_SIZE_16KB
273 config IA64_PAGE_SIZE_64KB
280 prompt "Page Table Levels"
287 depends on !IA64_PAGE_SIZE_64KB
298 source kernel/Kconfig.hz
306 # align cache-sensitive data to 128 bytes
307 config IA64_L1_CACHE_SHIFT
309 default "7" if MCKINLEY
310 default "6" if ITANIUM
313 bool "Cyclone (EXA) Time Source support"
315 Say Y here to enable support for IBM EXA Cyclone time source.
316 If you're unsure, answer N.
320 depends on !IA64_HP_SIM
323 config FORCE_MAX_ZONEORDER
324 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
325 range 11 17 if !HUGETLB_PAGE
326 default "17" if HUGETLB_PAGE
329 config VIRT_CPU_ACCOUNTING
330 bool "Deterministic task and CPU time accounting"
333 Select this option to enable more accurate task and CPU time
334 accounting. This is done by reading a CPU counter on each
335 kernel entry and exit and on transitions within the kernel
336 between system, softirq and hardirq state, so there is a
337 small performance impact.
338 If in doubt, say N here.
341 bool "Symmetric multi-processing support"
342 select USE_GENERIC_SMP_HELPERS
344 This enables support for systems with more than one CPU. If you have
345 a system with only one CPU, say N. If you have a system with more
348 If you say N here, the kernel will run on single and multiprocessor
349 systems, but will use only one CPU of a multiprocessor system. If
350 you say Y here, the kernel will run on many, but not all,
351 single processor systems. On a single processor system, the kernel
352 will run faster if you say N here.
354 See also the SMP-HOWTO available at
355 <http://www.tldp.org/docs.html#howto>.
357 If you don't know what to do here, say N.
360 int "Maximum number of CPUs (2-4096)"
365 You should set this to the number of CPUs in your system, but
366 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
367 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
368 than 64 will cause the use of a CPU mask array, causing a small
372 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
373 depends on SMP && EXPERIMENTAL
377 Say Y here to experiment with turning CPUs off and on. CPUs
378 can be controlled through /sys/devices/system/cpu/cpu#.
379 Say N if you want to disable CPU hotplug.
381 config ARCH_ENABLE_MEMORY_HOTPLUG
384 config ARCH_ENABLE_MEMORY_HOTREMOVE
388 bool "SMT scheduler support"
391 Improves the CPU scheduler's decision making when dealing with
392 Intel IA64 chips with MultiThreading at a cost of slightly increased
393 overhead in some places. If unsure say N here.
395 config PERMIT_BSP_REMOVE
396 bool "Support removal of Bootstrap Processor"
397 depends on HOTPLUG_CPU
400 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
403 config FORCE_CPEI_RETARGET
404 bool "Force assumption that CPEI can be re-targetted"
405 depends on PERMIT_BSP_REMOVE
408 Say Y if you need to force the assumption that CPEI can be re-targetted to
409 any cpu in the system. This hint is available via ACPI 3.0 specifications.
410 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
411 This option it useful to enable this feature on older BIOS's as well.
412 You can also enable this by using boot command line option force_cpei=1.
414 source "kernel/Kconfig.preempt"
418 config ARCH_SELECT_MEMORY_MODEL
421 config ARCH_DISCONTIGMEM_ENABLE
424 Say Y to support efficient handling of discontiguous physical memory,
425 for architectures which are either NUMA (Non-Uniform Memory Access)
426 or have huge holes in the physical address space for other reasons.
427 See <file:Documentation/vm/numa> for more.
429 config ARCH_FLATMEM_ENABLE
432 config ARCH_SPARSEMEM_ENABLE
434 depends on ARCH_DISCONTIGMEM_ENABLE
435 select SPARSEMEM_VMEMMAP_ENABLE
437 config ARCH_DISCONTIGMEM_DEFAULT
438 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
439 depends on ARCH_DISCONTIGMEM_ENABLE
443 depends on !IA64_HP_SIM && !FLATMEM
444 default y if IA64_SGI_SN2
445 select ACPI_NUMA if ACPI
447 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
448 Access). This option is for configuring high-end multiprocessor
449 server systems. If in doubt, say N.
452 int "Max num nodes shift(3-10)"
455 depends on NEED_MULTIPLE_NODES
457 This option specifies the maximum number of nodes in your SSI system.
458 MAX_NUMNODES will be 2^(This value).
459 If in doubt, use the default.
461 config ARCH_POPULATES_NODE_MAP
464 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
465 # VIRTUAL_MEM_MAP has been retained for historical reasons.
466 config VIRTUAL_MEM_MAP
467 bool "Virtual mem map"
468 depends on !SPARSEMEM
469 default y if !IA64_HP_SIM
471 Say Y to compile the kernel with support for a virtual mem map.
472 This code also only takes effect if a memory hole of greater than
473 1 Gb is found during boot. You must turn this option on if you
474 require the DISCONTIGMEM option for your machine. If you are
479 default y if VIRTUAL_MEM_MAP
481 config HAVE_ARCH_EARLY_PFN_TO_NID
483 depends on NEED_MULTIPLE_NODES
485 config HAVE_ARCH_NODEDATA_EXTENSION
490 bool "Support for Linux/x86 binaries"
492 IA-64 processors can execute IA-32 (X86) instructions. By
493 saying Y here, the kernel will include IA-32 system call
494 emulation support which makes it possible to transparently
495 run IA-32 Linux binaries on an IA-64 Linux system.
500 depends on IA32_SUPPORT
503 config COMPAT_FOR_U64_ALIGNMENT
506 config IA64_MCA_RECOVERY
507 tristate "MCA recovery from errors other than TLB."
510 bool "Performance monitor support"
512 Selects whether support for the IA-64 performance monitor hardware
513 is included in the kernel. This makes some kernel data-structures a
514 little bigger and slows down execution a bit, but it is generally
515 a good idea to turn this on. If you're unsure, say Y.
518 tristate "/proc/pal support"
520 If you say Y here, you are able to get PAL (Processor Abstraction
521 Layer) information in /proc/pal. This contains useful information
522 about the processors in your systems, such as cache and TLB sizes
523 and the PAL firmware version in use.
525 To use this option, you have to ensure that the "/proc file system
526 support" (CONFIG_PROC_FS) is enabled, too.
528 config IA64_MC_ERR_INJECT
529 tristate "MC error injection support"
531 Adds support for MC error injection. If enabled, the kernel
532 will provide a sysfs interface for user applications to
533 call MC error injection PAL procedures to inject various errors.
534 This is a useful tool for MCA testing.
536 If you're unsure, do not select this option.
539 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
542 bool "ESI (Extensible SAL Interface) support"
544 If you say Y here, support is built into the kernel to
545 make ESI calls. ESI calls are used to support vendor-specific
546 firmware extensions, such as the ability to inject memory-errors
547 for test-purposes. If you're unsure, say N.
549 config IA64_HP_AML_NFW
550 bool "Support ACPI AML calls to native firmware"
552 This driver installs a global ACPI Operation Region handler for
553 region 0xA1. AML methods can use this OpRegion to call arbitrary
554 native firmware functions. The driver installs the OpRegion
555 handler if there is an HPQ5001 device or if the user supplies
556 the "force" module parameter, e.g., with the "aml_nfw.force"
557 kernel command line option.
559 source "drivers/sn/Kconfig"
562 bool "kexec system call (EXPERIMENTAL)"
563 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
565 kexec is a system call that implements the ability to shutdown your
566 current kernel, and to start another kernel. It is like a reboot
567 but it is independent of the system firmware. And like a reboot
568 you can start any kernel with it, not just Linux.
570 The name comes from the similarity to the exec system call.
572 It is an ongoing process to be certain the hardware in a machine
573 is properly shutdown, so do not be surprised if this code does not
574 initially work for you. It may help to enable device hotplugging
575 support. As of this writing the exact hardware interface is
576 strongly in flux, so no good recommendation can be made.
579 bool "kernel crash dumps"
580 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
582 Generate crash dump after being started by kexec.
584 source "drivers/firmware/Kconfig"
586 source "fs/Kconfig.binfmt"
590 menu "Power management and ACPI options"
592 source "kernel/power/Kconfig"
594 source "drivers/acpi/Kconfig"
598 source "arch/ia64/kernel/cpufreq/Kconfig"
606 menu "Bus options (PCI, PCMCIA)"
611 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
612 here unless you are using a simulator without PCI support.
620 source "drivers/pci/pcie/Kconfig"
622 source "drivers/pci/Kconfig"
624 source "drivers/pci/hotplug/Kconfig"
626 source "drivers/pcmcia/Kconfig"
629 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
630 depends on IA64_GENERIC && ACPI && EXPERIMENTAL
632 DMA remapping (DMAR) devices support enables independent address
633 translations for Direct Memory Access (DMA) from devices.
634 These DMA remapping devices are reported via ACPI tables
635 and include PCI device scope covered by these DMA
644 source "drivers/Kconfig"
646 source "arch/ia64/hp/sim/Kconfig"
649 tristate "Memory special operations driver"
651 select IA64_UNCACHED_ALLOCATOR
653 If you have an ia64 and you want to enable memory special
654 operations support (formerly known as fetchop), say Y here,
659 source "arch/ia64/Kconfig.debug"
661 source "security/Kconfig"
663 source "crypto/Kconfig"
665 source "arch/ia64/kvm/Kconfig"
670 # Use the generic interrupt handling code in kernel/irq/:
672 config GENERIC_HARDIRQS
676 config GENERIC_IRQ_PROBE
680 config GENERIC_PENDING_IRQ
682 depends on GENERIC_HARDIRQS && SMP
690 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)