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"
153 This selects the system type of your hardware. A "generic" kernel
154 will run on any supported IA-64 system. However, if you configure
155 a kernel for your specific system, it will be faster and smaller.
157 generic For any supported IA-64 system
158 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
159 DIG+Intel+IOMMU For DIG systems with Intel IOMMU
160 HP-zx1/sx1000 For HP systems
161 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
162 SGI-SN2 For SGI Altix systems
163 SGI-UV For SGI UV systems
164 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
165 Xen-domU For xen domU system
167 If you don't know what to do, choose "generic".
174 bool "DIG+Intel+IOMMU"
181 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
182 support for the HP I/O MMU.
184 config IA64_HP_ZX1_SWIOTLB
185 bool "HP-zx1/sx1000 with software I/O TLB"
188 Build a kernel that runs on HP zx1 and sx1000 systems even when they
189 have broken PCI devices which cannot DMA to full 32 bits. Apart
190 from support for the HP I/O MMU, this includes support for the software
191 I/O TLB, which allows supporting the broken devices at the expense of
192 wasting some kernel memory (about 2MB by default).
199 Selecting this option will optimize the kernel for use on sn2 based
200 systems, but the resulting kernel binary will not run on other
201 types of ia64 systems. If you have an SGI Altix system, it's safe
202 to select this option. If in doubt, select ia64 generic support
211 Selecting this option will optimize the kernel for use on UV based
212 systems, but the resulting kernel binary will not run on other
213 types of ia64 systems. If you have an SGI UV system, it's safe
214 to select this option. If in doubt, select ia64 generic support
221 config IA64_XEN_GUEST
228 prompt "Processor type"
234 Select your IA-64 processor type. The default is Itanium.
235 This choice is safe for all IA-64 systems, but may not perform
236 optimally on systems with, say, Itanium 2 or newer processors.
241 Select this to configure for an Itanium 2 (McKinley) processor.
246 prompt "Kernel page size"
247 default IA64_PAGE_SIZE_16KB
249 config IA64_PAGE_SIZE_4KB
252 This lets you select the page size of the kernel. For best IA-64
253 performance, a page size of 8KB or 16KB is recommended. For best
254 IA-32 compatibility, a page size of 4KB should be selected (the vast
255 majority of IA-32 binaries work perfectly fine with a larger page
256 size). For Itanium 2 or newer systems, a page size of 64KB can also
259 4KB For best IA-32 compatibility
260 8KB For best IA-64 performance
261 16KB For best IA-64 performance
262 64KB Requires Itanium 2 or newer processor.
264 If you don't know what to do, choose 16KB.
266 config IA64_PAGE_SIZE_8KB
269 config IA64_PAGE_SIZE_16KB
272 config IA64_PAGE_SIZE_64KB
279 prompt "Page Table Levels"
286 depends on !IA64_PAGE_SIZE_64KB
297 source kernel/Kconfig.hz
305 # align cache-sensitive data to 128 bytes
306 config IA64_L1_CACHE_SHIFT
308 default "7" if MCKINLEY
309 default "6" if ITANIUM
312 bool "Cyclone (EXA) Time Source support"
314 Say Y here to enable support for IBM EXA Cyclone time source.
315 If you're unsure, answer N.
319 depends on !IA64_HP_SIM
322 config FORCE_MAX_ZONEORDER
323 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
324 range 11 17 if !HUGETLB_PAGE
325 default "17" if HUGETLB_PAGE
328 config VIRT_CPU_ACCOUNTING
329 bool "Deterministic task and CPU time accounting"
332 Select this option to enable more accurate task and CPU time
333 accounting. This is done by reading a CPU counter on each
334 kernel entry and exit and on transitions within the kernel
335 between system, softirq and hardirq state, so there is a
336 small performance impact.
337 If in doubt, say N here.
340 bool "Symmetric multi-processing support"
341 select USE_GENERIC_SMP_HELPERS
343 This enables support for systems with more than one CPU. If you have
344 a system with only one CPU, say N. If you have a system with more
347 If you say N here, the kernel will run on single and multiprocessor
348 systems, but will use only one CPU of a multiprocessor system. If
349 you say Y here, the kernel will run on many, but not all,
350 single processor systems. On a single processor system, the kernel
351 will run faster if you say N here.
353 See also the SMP-HOWTO available at
354 <http://www.tldp.org/docs.html#howto>.
356 If you don't know what to do here, say N.
359 int "Maximum number of CPUs (2-4096)"
364 You should set this to the number of CPUs in your system, but
365 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
366 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
367 than 64 will cause the use of a CPU mask array, causing a small
371 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
372 depends on SMP && EXPERIMENTAL
376 Say Y here to experiment with turning CPUs off and on. CPUs
377 can be controlled through /sys/devices/system/cpu/cpu#.
378 Say N if you want to disable CPU hotplug.
380 config ARCH_ENABLE_MEMORY_HOTPLUG
383 config ARCH_ENABLE_MEMORY_HOTREMOVE
387 bool "SMT scheduler support"
390 Improves the CPU scheduler's decision making when dealing with
391 Intel IA64 chips with MultiThreading at a cost of slightly increased
392 overhead in some places. If unsure say N here.
394 config PERMIT_BSP_REMOVE
395 bool "Support removal of Bootstrap Processor"
396 depends on HOTPLUG_CPU
399 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
402 config FORCE_CPEI_RETARGET
403 bool "Force assumption that CPEI can be re-targetted"
404 depends on PERMIT_BSP_REMOVE
407 Say Y if you need to force the assumption that CPEI can be re-targetted to
408 any cpu in the system. This hint is available via ACPI 3.0 specifications.
409 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
410 This option it useful to enable this feature on older BIOS's as well.
411 You can also enable this by using boot command line option force_cpei=1.
413 source "kernel/Kconfig.preempt"
417 config ARCH_SELECT_MEMORY_MODEL
420 config ARCH_DISCONTIGMEM_ENABLE
423 Say Y to support efficient handling of discontiguous physical memory,
424 for architectures which are either NUMA (Non-Uniform Memory Access)
425 or have huge holes in the physical address space for other reasons.
426 See <file:Documentation/vm/numa> for more.
428 config ARCH_FLATMEM_ENABLE
431 config ARCH_SPARSEMEM_ENABLE
433 depends on ARCH_DISCONTIGMEM_ENABLE
434 select SPARSEMEM_VMEMMAP_ENABLE
436 config ARCH_DISCONTIGMEM_DEFAULT
437 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
438 depends on ARCH_DISCONTIGMEM_ENABLE
442 depends on !IA64_HP_SIM && !FLATMEM
443 default y if IA64_SGI_SN2
444 select ACPI_NUMA if ACPI
446 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
447 Access). This option is for configuring high-end multiprocessor
448 server systems. If in doubt, say N.
451 int "Max num nodes shift(3-10)"
454 depends on NEED_MULTIPLE_NODES
456 This option specifies the maximum number of nodes in your SSI system.
457 MAX_NUMNODES will be 2^(This value).
458 If in doubt, use the default.
460 config ARCH_POPULATES_NODE_MAP
463 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
464 # VIRTUAL_MEM_MAP has been retained for historical reasons.
465 config VIRTUAL_MEM_MAP
466 bool "Virtual mem map"
467 depends on !SPARSEMEM
468 default y if !IA64_HP_SIM
470 Say Y to compile the kernel with support for a virtual mem map.
471 This code also only takes effect if a memory hole of greater than
472 1 Gb is found during boot. You must turn this option on if you
473 require the DISCONTIGMEM option for your machine. If you are
478 default y if VIRTUAL_MEM_MAP
480 config HAVE_ARCH_EARLY_PFN_TO_NID
482 depends on NEED_MULTIPLE_NODES
484 config HAVE_ARCH_NODEDATA_EXTENSION
489 bool "Support for Linux/x86 binaries"
491 IA-64 processors can execute IA-32 (X86) instructions. By
492 saying Y here, the kernel will include IA-32 system call
493 emulation support which makes it possible to transparently
494 run IA-32 Linux binaries on an IA-64 Linux system.
499 depends on IA32_SUPPORT
502 config COMPAT_FOR_U64_ALIGNMENT
505 config IA64_MCA_RECOVERY
506 tristate "MCA recovery from errors other than TLB."
509 bool "Performance monitor support"
511 Selects whether support for the IA-64 performance monitor hardware
512 is included in the kernel. This makes some kernel data-structures a
513 little bigger and slows down execution a bit, but it is generally
514 a good idea to turn this on. If you're unsure, say Y.
517 tristate "/proc/pal support"
519 If you say Y here, you are able to get PAL (Processor Abstraction
520 Layer) information in /proc/pal. This contains useful information
521 about the processors in your systems, such as cache and TLB sizes
522 and the PAL firmware version in use.
524 To use this option, you have to ensure that the "/proc file system
525 support" (CONFIG_PROC_FS) is enabled, too.
527 config IA64_MC_ERR_INJECT
528 tristate "MC error injection support"
530 Adds support for MC error injection. If enabled, the kernel
531 will provide a sysfs interface for user applications to
532 call MC error injection PAL procedures to inject various errors.
533 This is a useful tool for MCA testing.
535 If you're unsure, do not select this option.
538 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
541 bool "ESI (Extensible SAL Interface) support"
543 If you say Y here, support is built into the kernel to
544 make ESI calls. ESI calls are used to support vendor-specific
545 firmware extensions, such as the ability to inject memory-errors
546 for test-purposes. If you're unsure, say N.
548 config IA64_HP_AML_NFW
549 bool "Support ACPI AML calls to native firmware"
551 This driver installs a global ACPI Operation Region handler for
552 region 0xA1. AML methods can use this OpRegion to call arbitrary
553 native firmware functions. The driver installs the OpRegion
554 handler if there is an HPQ5001 device or if the user supplies
555 the "force" module parameter, e.g., with the "aml_nfw.force"
556 kernel command line option.
558 source "drivers/sn/Kconfig"
561 bool "kexec system call (EXPERIMENTAL)"
562 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
564 kexec is a system call that implements the ability to shutdown your
565 current kernel, and to start another kernel. It is like a reboot
566 but it is independent of the system firmware. And like a reboot
567 you can start any kernel with it, not just Linux.
569 The name comes from the similarity to the exec system call.
571 It is an ongoing process to be certain the hardware in a machine
572 is properly shutdown, so do not be surprised if this code does not
573 initially work for you. It may help to enable device hotplugging
574 support. As of this writing the exact hardware interface is
575 strongly in flux, so no good recommendation can be made.
578 bool "kernel crash dumps"
579 depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
581 Generate crash dump after being started by kexec.
583 source "drivers/firmware/Kconfig"
585 source "fs/Kconfig.binfmt"
589 menu "Power management and ACPI options"
591 source "kernel/power/Kconfig"
593 source "drivers/acpi/Kconfig"
597 source "arch/ia64/kernel/cpufreq/Kconfig"
605 menu "Bus options (PCI, PCMCIA)"
610 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
611 here unless you are using a simulator without PCI support.
619 source "drivers/pci/pcie/Kconfig"
621 source "drivers/pci/Kconfig"
623 source "drivers/pci/hotplug/Kconfig"
625 source "drivers/pcmcia/Kconfig"
628 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
629 depends on IA64_GENERIC && ACPI && EXPERIMENTAL
631 DMA remapping (DMAR) devices support enables independent address
632 translations for Direct Memory Access (DMA) from devices.
633 These DMA remapping devices are reported via ACPI tables
634 and include PCI device scope covered by these DMA
643 source "drivers/Kconfig"
645 source "arch/ia64/hp/sim/Kconfig"
648 tristate "Memory special operations driver"
650 select IA64_UNCACHED_ALLOCATOR
652 If you have an ia64 and you want to enable memory special
653 operations support (formerly known as fetchop), say Y here,
658 source "arch/ia64/Kconfig.debug"
660 source "security/Kconfig"
662 source "crypto/Kconfig"
664 source "arch/ia64/kvm/Kconfig"
669 # Use the generic interrupt handling code in kernel/irq/:
671 config GENERIC_HARDIRQS
675 config GENERIC_IRQ_PROBE
679 config GENERIC_PENDING_IRQ
681 depends on GENERIC_HARDIRQS && SMP
689 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC || SWIOTLB)