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
20 The Itanium Processor Family is Intel's 64-bit successor to
21 the 32-bit X86 line. The IA-64 Linux project has a home
22 page at <http://www.linuxia64.org/> and a mailing list at
23 <linux-ia64@vger.kernel.org>.
27 select ATA_NONSTANDARD if ATA
32 depends on !IA64_SGI_SN2
45 config RWSEM_XCHGADD_ALGORITHM
49 config ARCH_HAS_ILOG2_U32
53 config ARCH_HAS_ILOG2_U64
57 config HUGETLB_PAGE_SIZE_VARIABLE
59 depends on HUGETLB_PAGE
62 config GENERIC_FIND_NEXT_BIT
66 config GENERIC_CALIBRATE_DELAY
74 config GENERIC_TIME_VSYSCALL
90 config SCHED_NO_NO_OMIT_FRAME_POINTER
94 config IA64_UNCACHED_ALLOCATOR
96 select GENERIC_ALLOCATOR
112 This selects the system type of your hardware. A "generic" kernel
113 will run on any supported IA-64 system. However, if you configure
114 a kernel for your specific system, it will be faster and smaller.
116 generic For any supported IA-64 system
117 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
118 HP-zx1/sx1000 For HP systems
119 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
120 SGI-SN2 For SGI Altix systems
121 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
123 If you don't know what to do, choose "generic".
132 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
133 support for the HP I/O MMU.
135 config IA64_HP_ZX1_SWIOTLB
136 bool "HP-zx1/sx1000 with software I/O TLB"
139 Build a kernel that runs on HP zx1 and sx1000 systems even when they
140 have broken PCI devices which cannot DMA to full 32 bits. Apart
141 from support for the HP I/O MMU, this includes support for the software
142 I/O TLB, which allows supporting the broken devices at the expense of
143 wasting some kernel memory (about 2MB by default).
148 Selecting this option will optimize the kernel for use on sn2 based
149 systems, but the resulting kernel binary will not run on other
150 types of ia64 systems. If you have an SGI Altix system, it's safe
151 to select this option. If in doubt, select ia64 generic support
161 prompt "Processor type"
167 Select your IA-64 processor type. The default is Itanium.
168 This choice is safe for all IA-64 systems, but may not perform
169 optimally on systems with, say, Itanium 2 or newer processors.
174 Select this to configure for an Itanium 2 (McKinley) processor.
179 prompt "Kernel page size"
180 default IA64_PAGE_SIZE_16KB
182 config IA64_PAGE_SIZE_4KB
185 This lets you select the page size of the kernel. For best IA-64
186 performance, a page size of 8KB or 16KB is recommended. For best
187 IA-32 compatibility, a page size of 4KB should be selected (the vast
188 majority of IA-32 binaries work perfectly fine with a larger page
189 size). For Itanium 2 or newer systems, a page size of 64KB can also
192 4KB For best IA-32 compatibility
193 8KB For best IA-64 performance
194 16KB For best IA-64 performance
195 64KB Requires Itanium 2 or newer processor.
197 If you don't know what to do, choose 16KB.
199 config IA64_PAGE_SIZE_8KB
202 config IA64_PAGE_SIZE_16KB
205 config IA64_PAGE_SIZE_64KB
212 prompt "Page Table Levels"
219 depends on !IA64_PAGE_SIZE_64KB
224 source kernel/Kconfig.hz
231 # align cache-sensitive data to 128 bytes
232 config IA64_L1_CACHE_SHIFT
234 default "7" if MCKINLEY
235 default "6" if ITANIUM
238 bool "Cyclone (EXA) Time Source support"
240 Say Y here to enable support for IBM EXA Cyclone time source.
241 If you're unsure, answer N.
245 depends on !IA64_HP_SIM
248 config IA64_SGI_SN_XP
249 tristate "Support communication between SGI SSIs"
250 depends on IA64_GENERIC || IA64_SGI_SN2
251 select IA64_UNCACHED_ALLOCATOR
253 An SGI machine can be divided into multiple Single System
254 Images which act independently of each other and have
255 hardware based memory protection from the others. Enabling
256 this feature will allow for direct communication between SSIs
257 based on a network adapter and DMA messaging.
259 config FORCE_MAX_ZONEORDER
260 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
261 range 11 17 if !HUGETLB_PAGE
262 default "17" if HUGETLB_PAGE
266 bool "Symmetric multi-processing support"
268 This enables support for systems with more than one CPU. If you have
269 a system with only one CPU, say N. If you have a system with more
272 If you say N here, the kernel will run on single and multiprocessor
273 systems, but will use only one CPU of a multiprocessor system. If
274 you say Y here, the kernel will run on many, but not all,
275 single processor systems. On a single processor system, the kernel
276 will run faster if you say N here.
278 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
279 available at <http://www.tldp.org/docs.html#howto>.
281 If you don't know what to do here, say N.
284 int "Maximum number of CPUs (2-1024)"
289 You should set this to the number of CPUs in your system, but
290 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
291 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
292 than 64 will cause the use of a CPU mask array, causing a small
296 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
297 depends on SMP && EXPERIMENTAL
301 Say Y here to experiment with turning CPUs off and on. CPUs
302 can be controlled through /sys/devices/system/cpu/cpu#.
303 Say N if you want to disable CPU hotplug.
305 config ARCH_ENABLE_MEMORY_HOTPLUG
309 bool "SMT scheduler support"
312 Improves the CPU scheduler's decision making when dealing with
313 Intel IA64 chips with MultiThreading at a cost of slightly increased
314 overhead in some places. If unsure say N here.
316 config PERMIT_BSP_REMOVE
317 bool "Support removal of Bootstrap Processor"
318 depends on HOTPLUG_CPU
321 Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
324 config FORCE_CPEI_RETARGET
325 bool "Force assumption that CPEI can be re-targetted"
326 depends on PERMIT_BSP_REMOVE
329 Say Y if you need to force the assumption that CPEI can be re-targetted to
330 any cpu in the system. This hint is available via ACPI 3.0 specifications.
331 Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
332 This option it useful to enable this feature on older BIOS's as well.
333 You can also enable this by using boot command line option force_cpei=1.
335 source "kernel/Kconfig.preempt"
339 config ARCH_SELECT_MEMORY_MODEL
342 config ARCH_DISCONTIGMEM_ENABLE
345 Say Y to support efficient handling of discontiguous physical memory,
346 for architectures which are either NUMA (Non-Uniform Memory Access)
347 or have huge holes in the physical address space for other reasons.
348 See <file:Documentation/vm/numa> for more.
350 config ARCH_FLATMEM_ENABLE
353 config ARCH_SPARSEMEM_ENABLE
355 depends on ARCH_DISCONTIGMEM_ENABLE
356 select SPARSEMEM_VMEMMAP_ENABLE
358 config ARCH_DISCONTIGMEM_DEFAULT
359 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
360 depends on ARCH_DISCONTIGMEM_ENABLE
364 depends on !IA64_HP_SIM && !FLATMEM
365 default y if IA64_SGI_SN2
366 select ACPI_NUMA if ACPI
368 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
369 Access). This option is for configuring high-end multiprocessor
370 server systems. If in doubt, say N.
373 int "Max num nodes shift(3-10)"
376 depends on NEED_MULTIPLE_NODES
378 This option specifies the maximum number of nodes in your SSI system.
379 MAX_NUMNODES will be 2^(This value).
380 If in doubt, use the default.
382 config ARCH_POPULATES_NODE_MAP
385 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
386 # VIRTUAL_MEM_MAP has been retained for historical reasons.
387 config VIRTUAL_MEM_MAP
388 bool "Virtual mem map"
389 depends on !SPARSEMEM
390 default y if !IA64_HP_SIM
392 Say Y to compile the kernel with support for a virtual mem map.
393 This code also only takes effect if a memory hole of greater than
394 1 Gb is found during boot. You must turn this option on if you
395 require the DISCONTIGMEM option for your machine. If you are
400 default y if VIRTUAL_MEM_MAP
402 config HAVE_ARCH_EARLY_PFN_TO_NID
404 depends on NEED_MULTIPLE_NODES
406 config HAVE_ARCH_NODEDATA_EXTENSION
411 bool "Support for Linux/x86 binaries"
413 IA-64 processors can execute IA-32 (X86) instructions. By
414 saying Y here, the kernel will include IA-32 system call
415 emulation support which makes it possible to transparently
416 run IA-32 Linux binaries on an IA-64 Linux system.
421 depends on IA32_SUPPORT
424 config COMPAT_FOR_U64_ALIGNMENT
427 config IA64_MCA_RECOVERY
428 tristate "MCA recovery from errors other than TLB."
431 bool "Performance monitor support"
433 Selects whether support for the IA-64 performance monitor hardware
434 is included in the kernel. This makes some kernel data-structures a
435 little bigger and slows down execution a bit, but it is generally
436 a good idea to turn this on. If you're unsure, say Y.
439 tristate "/proc/pal support"
441 If you say Y here, you are able to get PAL (Processor Abstraction
442 Layer) information in /proc/pal. This contains useful information
443 about the processors in your systems, such as cache and TLB sizes
444 and the PAL firmware version in use.
446 To use this option, you have to ensure that the "/proc file system
447 support" (CONFIG_PROC_FS) is enabled, too.
449 config IA64_MC_ERR_INJECT
450 tristate "MC error injection support"
452 Selets whether support for MC error injection. By enabling the
453 support, kernel provide sysfs interface for user application to
454 call MC error injection PAL procedure to inject various errors.
455 This is a useful tool for MCA testing.
457 If you're unsure, do not select this option.
460 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
463 bool "ESI (Extensible SAL Interface) support"
465 If you say Y here, support is built into the kernel to
466 make ESI calls. ESI calls are used to support vendor-specific
467 firmware extensions, such as the ability to inject memory-errors
468 for test-purposes. If you're unsure, say N.
470 config IA64_HP_AML_NFW
471 bool "Support ACPI AML calls to native firmware"
473 This driver installs a global ACPI Operation Region handler for
474 region 0xA1. AML methods can use this OpRegion to call arbitrary
475 native firmware functions. The driver installs the OpRegion
476 handler if there is an HPQ5001 device or if the user supplies
477 the "force" module parameter, e.g., with the "aml_nfw.force"
478 kernel command line option.
480 source "drivers/sn/Kconfig"
483 bool "kexec system call (EXPERIMENTAL)"
484 depends on EXPERIMENTAL && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
486 kexec is a system call that implements the ability to shutdown your
487 current kernel, and to start another kernel. It is like a reboot
488 but it is independent of the system firmware. And like a reboot
489 you can start any kernel with it, not just Linux.
491 The name comes from the similiarity to the exec system call.
493 It is an ongoing process to be certain the hardware in a machine
494 is properly shutdown, so do not be surprised if this code does not
495 initially work for you. It may help to enable device hotplugging
496 support. As of this writing the exact hardware interface is
497 strongly in flux, so no good recommendation can be made.
500 bool "kernel crash dumps (EXPERIMENTAL)"
501 depends on EXPERIMENTAL && IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
503 Generate crash dump after being started by kexec.
505 source "drivers/firmware/Kconfig"
507 source "fs/Kconfig.binfmt"
511 menu "Power management and ACPI"
513 source "kernel/power/Kconfig"
515 source "drivers/acpi/Kconfig"
519 source "arch/ia64/kernel/cpufreq/Kconfig"
527 menu "Bus options (PCI, PCMCIA)"
532 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
533 here unless you are using a simulator without PCI support.
541 source "drivers/pci/pcie/Kconfig"
543 source "drivers/pci/Kconfig"
545 source "drivers/pci/hotplug/Kconfig"
547 source "drivers/pcmcia/Kconfig"
555 source "drivers/Kconfig"
558 tristate "Memory special operations driver"
560 select IA64_UNCACHED_ALLOCATOR
562 If you have an ia64 and you want to enable memory special
563 operations support (formerly known as fetchop), say Y here,
571 # Use the generic interrupt handling code in kernel/irq/:
573 config GENERIC_HARDIRQS
577 config GENERIC_IRQ_PROBE
581 config GENERIC_PENDING_IRQ
583 depends on GENERIC_HARDIRQS && SMP
590 source "arch/ia64/hp/sim/Kconfig"
592 menu "Instrumentation Support"
593 depends on EXPERIMENTAL
595 source "arch/ia64/oprofile/Kconfig"
599 depends on KALLSYMS && MODULES
601 Kprobes allows you to trap at almost any kernel address and
602 execute a callback function. register_kprobe() establishes
603 a probepoint and specifies the callback. Kprobes is useful
604 for kernel debugging, non-intrusive instrumentation and testing.
605 If in doubt, say "N".
608 source "arch/ia64/Kconfig.debug"
610 source "security/Kconfig"
612 source "crypto/Kconfig"