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 menu "Processor type and features"
14 select PCI if (!IA64_HP_SIM)
15 select ACPI if (!IA64_HP_SIM)
16 select PM if (!IA64_HP_SIM)
17 select ARCH_SUPPORTS_MSI
21 select HAVE_KRETPROBES
24 The Itanium Processor Family is Intel's 64-bit successor to
25 the 32-bit X86 line. The IA-64 Linux project has a home
26 page at <http://www.linuxia64.org/> and a mailing list at
27 <linux-ia64@vger.kernel.org>.
31 select ATA_NONSTANDARD if ATA
36 depends on !IA64_SGI_SN2
49 config GENERIC_LOCKBREAK
52 depends on SMP && PREEMPT
54 config RWSEM_XCHGADD_ALGORITHM
58 config ARCH_HAS_ILOG2_U32
62 config ARCH_HAS_ILOG2_U64
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
124 This selects the system type of your hardware. A "generic" kernel
125 will run on any supported IA-64 system. However, if you configure
126 a kernel for your specific system, it will be faster and smaller.
128 generic For any supported IA-64 system
129 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
130 HP-zx1/sx1000 For HP systems
131 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
132 SGI-SN2 For SGI Altix systems
133 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
135 If you don't know what to do, choose "generic".
144 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
145 support for the HP I/O MMU.
147 config IA64_HP_ZX1_SWIOTLB
148 bool "HP-zx1/sx1000 with software I/O TLB"
151 Build a kernel that runs on HP zx1 and sx1000 systems even when they
152 have broken PCI devices which cannot DMA to full 32 bits. Apart
153 from support for the HP I/O MMU, this includes support for the software
154 I/O TLB, which allows supporting the broken devices at the expense of
155 wasting some kernel memory (about 2MB by default).
162 Selecting this option will optimize the kernel for use on sn2 based
163 systems, but the resulting kernel binary will not run on other
164 types of ia64 systems. If you have an SGI Altix system, it's safe
165 to select this option. If in doubt, select ia64 generic support
175 prompt "Processor type"
181 Select your IA-64 processor type. The default is Itanium.
182 This choice is safe for all IA-64 systems, but may not perform
183 optimally on systems with, say, Itanium 2 or newer processors.
188 Select this to configure for an Itanium 2 (McKinley) processor.
193 prompt "Kernel page size"
194 default IA64_PAGE_SIZE_16KB
196 config IA64_PAGE_SIZE_4KB
199 This lets you select the page size of the kernel. For best IA-64
200 performance, a page size of 8KB or 16KB is recommended. For best
201 IA-32 compatibility, a page size of 4KB should be selected (the vast
202 majority of IA-32 binaries work perfectly fine with a larger page
203 size). For Itanium 2 or newer systems, a page size of 64KB can also
206 4KB For best IA-32 compatibility
207 8KB For best IA-64 performance
208 16KB For best IA-64 performance
209 64KB Requires Itanium 2 or newer processor.
211 If you don't know what to do, choose 16KB.
213 config IA64_PAGE_SIZE_8KB
216 config IA64_PAGE_SIZE_16KB
219 config IA64_PAGE_SIZE_64KB
226 prompt "Page Table Levels"
233 depends on !IA64_PAGE_SIZE_64KB
244 source kernel/Kconfig.hz
252 # align cache-sensitive data to 128 bytes
253 config IA64_L1_CACHE_SHIFT
255 default "7" if MCKINLEY
256 default "6" if ITANIUM
259 bool "Cyclone (EXA) Time Source support"
261 Say Y here to enable support for IBM EXA Cyclone time source.
262 If you're unsure, answer N.
266 depends on !IA64_HP_SIM
269 config FORCE_MAX_ZONEORDER
270 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
271 range 11 17 if !HUGETLB_PAGE
272 default "17" if HUGETLB_PAGE
275 config VIRT_CPU_ACCOUNTING
276 bool "Deterministic task and CPU time accounting"
279 Select this option to enable more accurate task and CPU time
280 accounting. This is done by reading a CPU counter on each
281 kernel entry and exit and on transitions within the kernel
282 between system, softirq and hardirq state, so there is a
283 small performance impact.
284 If in doubt, say N here.
287 bool "Symmetric multi-processing support"
289 This enables support for systems with more than one CPU. If you have
290 a system with only one CPU, say N. If you have a system with more
293 If you say N here, the kernel will run on single and multiprocessor
294 systems, but will use only one CPU of a multiprocessor system. If
295 you say Y here, the kernel will run on many, but not all,
296 single processor systems. On a single processor system, the kernel
297 will run faster if you say N here.
299 See also the SMP-HOWTO available at
300 <http://www.tldp.org/docs.html#howto>.
302 If you don't know what to do here, say N.
305 int "Maximum number of CPUs (2-1024)"
310 You should set this to the number of CPUs in your system, but
311 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
312 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
313 than 64 will cause the use of a CPU mask array, causing a small
317 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
318 depends on SMP && EXPERIMENTAL
322 Say Y here to experiment with turning CPUs off and on. CPUs
323 can be controlled through /sys/devices/system/cpu/cpu#.
324 Say N if you want to disable CPU hotplug.
326 config ARCH_ENABLE_MEMORY_HOTPLUG
329 config ARCH_ENABLE_MEMORY_HOTREMOVE
333 bool "SMT scheduler support"
336 Improves the CPU scheduler's decision making when dealing with
337 Intel IA64 chips with MultiThreading at a cost of slightly increased
338 overhead in some places. If unsure say N here.
340 config PERMIT_BSP_REMOVE
341 bool "Support removal of Bootstrap Processor"
342 depends on HOTPLUG_CPU
345 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
348 config FORCE_CPEI_RETARGET
349 bool "Force assumption that CPEI can be re-targetted"
350 depends on PERMIT_BSP_REMOVE
353 Say Y if you need to force the assumption that CPEI can be re-targetted to
354 any cpu in the system. This hint is available via ACPI 3.0 specifications.
355 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
356 This option it useful to enable this feature on older BIOS's as well.
357 You can also enable this by using boot command line option force_cpei=1.
359 source "kernel/Kconfig.preempt"
363 config ARCH_SELECT_MEMORY_MODEL
366 config ARCH_DISCONTIGMEM_ENABLE
369 Say Y to support efficient handling of discontiguous physical memory,
370 for architectures which are either NUMA (Non-Uniform Memory Access)
371 or have huge holes in the physical address space for other reasons.
372 See <file:Documentation/vm/numa> for more.
374 config ARCH_FLATMEM_ENABLE
377 config ARCH_SPARSEMEM_ENABLE
379 depends on ARCH_DISCONTIGMEM_ENABLE
380 select SPARSEMEM_VMEMMAP_ENABLE
382 config ARCH_DISCONTIGMEM_DEFAULT
383 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
384 depends on ARCH_DISCONTIGMEM_ENABLE
388 depends on !IA64_HP_SIM && !FLATMEM
389 default y if IA64_SGI_SN2
390 select ACPI_NUMA if ACPI
392 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
393 Access). This option is for configuring high-end multiprocessor
394 server systems. If in doubt, say N.
397 int "Max num nodes shift(3-10)"
400 depends on NEED_MULTIPLE_NODES
402 This option specifies the maximum number of nodes in your SSI system.
403 MAX_NUMNODES will be 2^(This value).
404 If in doubt, use the default.
406 config ARCH_POPULATES_NODE_MAP
409 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
410 # VIRTUAL_MEM_MAP has been retained for historical reasons.
411 config VIRTUAL_MEM_MAP
412 bool "Virtual mem map"
413 depends on !SPARSEMEM
414 default y if !IA64_HP_SIM
416 Say Y to compile the kernel with support for a virtual mem map.
417 This code also only takes effect if a memory hole of greater than
418 1 Gb is found during boot. You must turn this option on if you
419 require the DISCONTIGMEM option for your machine. If you are
424 default y if VIRTUAL_MEM_MAP
426 config HAVE_ARCH_EARLY_PFN_TO_NID
428 depends on NEED_MULTIPLE_NODES
430 config HAVE_ARCH_NODEDATA_EXTENSION
435 bool "Support for Linux/x86 binaries"
437 IA-64 processors can execute IA-32 (X86) instructions. By
438 saying Y here, the kernel will include IA-32 system call
439 emulation support which makes it possible to transparently
440 run IA-32 Linux binaries on an IA-64 Linux system.
445 depends on IA32_SUPPORT
448 config COMPAT_FOR_U64_ALIGNMENT
451 config IA64_MCA_RECOVERY
452 tristate "MCA recovery from errors other than TLB."
455 bool "Performance monitor support"
457 Selects whether support for the IA-64 performance monitor hardware
458 is included in the kernel. This makes some kernel data-structures a
459 little bigger and slows down execution a bit, but it is generally
460 a good idea to turn this on. If you're unsure, say Y.
463 tristate "/proc/pal support"
465 If you say Y here, you are able to get PAL (Processor Abstraction
466 Layer) information in /proc/pal. This contains useful information
467 about the processors in your systems, such as cache and TLB sizes
468 and the PAL firmware version in use.
470 To use this option, you have to ensure that the "/proc file system
471 support" (CONFIG_PROC_FS) is enabled, too.
473 config IA64_MC_ERR_INJECT
474 tristate "MC error injection support"
476 Adds support for MC error injection. If enabled, the kernel
477 will provide a sysfs interface for user applications to
478 call MC error injection PAL procedures to inject various errors.
479 This is a useful tool for MCA testing.
481 If you're unsure, do not select this option.
484 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
487 bool "ESI (Extensible SAL Interface) support"
489 If you say Y here, support is built into the kernel to
490 make ESI calls. ESI calls are used to support vendor-specific
491 firmware extensions, such as the ability to inject memory-errors
492 for test-purposes. If you're unsure, say N.
494 config IA64_HP_AML_NFW
495 bool "Support ACPI AML calls to native firmware"
497 This driver installs a global ACPI Operation Region handler for
498 region 0xA1. AML methods can use this OpRegion to call arbitrary
499 native firmware functions. The driver installs the OpRegion
500 handler if there is an HPQ5001 device or if the user supplies
501 the "force" module parameter, e.g., with the "aml_nfw.force"
502 kernel command line option.
504 source "drivers/sn/Kconfig"
507 bool "kexec system call (EXPERIMENTAL)"
508 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
510 kexec is a system call that implements the ability to shutdown your
511 current kernel, and to start another kernel. It is like a reboot
512 but it is independent of the system firmware. And like a reboot
513 you can start any kernel with it, not just Linux.
515 The name comes from the similarity to the exec system call.
517 It is an ongoing process to be certain the hardware in a machine
518 is properly shutdown, so do not be surprised if this code does not
519 initially work for you. It may help to enable device hotplugging
520 support. As of this writing the exact hardware interface is
521 strongly in flux, so no good recommendation can be made.
524 bool "kernel crash dumps (EXPERIMENTAL)"
525 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
527 Generate crash dump after being started by kexec.
529 source "drivers/firmware/Kconfig"
531 source "fs/Kconfig.binfmt"
535 menu "Power management and ACPI"
537 source "kernel/power/Kconfig"
539 source "drivers/acpi/Kconfig"
543 source "arch/ia64/kernel/cpufreq/Kconfig"
551 menu "Bus options (PCI, PCMCIA)"
556 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
557 here unless you are using a simulator without PCI support.
565 source "drivers/pci/pcie/Kconfig"
567 source "drivers/pci/Kconfig"
569 source "drivers/pci/hotplug/Kconfig"
571 source "drivers/pcmcia/Kconfig"
579 source "drivers/Kconfig"
582 tristate "Memory special operations driver"
584 select IA64_UNCACHED_ALLOCATOR
586 If you have an ia64 and you want to enable memory special
587 operations support (formerly known as fetchop), say Y here,
595 # Use the generic interrupt handling code in kernel/irq/:
597 config GENERIC_HARDIRQS
601 config GENERIC_IRQ_PROBE
605 config GENERIC_PENDING_IRQ
607 depends on GENERIC_HARDIRQS && SMP
615 def_bool (IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB || IA64_GENERIC)
617 source "arch/ia64/hp/sim/Kconfig"
619 source "arch/ia64/Kconfig.debug"
621 source "security/Kconfig"
623 source "crypto/Kconfig"