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"
16 The Itanium Processor Family is Intel's 64-bit successor to
17 the 32-bit X86 line. The IA-64 Linux project has a home
18 page at <http://www.linuxia64.org/> and a mailing list at
19 <linux-ia64@vger.kernel.org>.
33 config RWSEM_XCHGADD_ALGORITHM
37 config GENERIC_CALIBRATE_DELAY
41 config TIME_INTERPOLATION
53 config SCHED_NO_NO_OMIT_FRAME_POINTER
57 config IA64_UNCACHED_ALLOCATOR
59 select GENERIC_ALLOCATOR
71 This selects the system type of your hardware. A "generic" kernel
72 will run on any supported IA-64 system. However, if you configure
73 a kernel for your specific system, it will be faster and smaller.
75 generic For any supported IA-64 system
76 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
77 HP-zx1/sx1000 For HP systems
78 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
79 SGI-SN2 For SGI Altix systems
80 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
82 If you don't know what to do, choose "generic".
90 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
91 support for the HP I/O MMU.
93 config IA64_HP_ZX1_SWIOTLB
94 bool "HP-zx1/sx1000 with software I/O TLB"
96 Build a kernel that runs on HP zx1 and sx1000 systems even when they
97 have broken PCI devices which cannot DMA to full 32 bits. Apart
98 from support for the HP I/O MMU, this includes support for the software
99 I/O TLB, which allows supporting the broken devices at the expense of
100 wasting some kernel memory (about 2MB by default).
105 Selecting this option will optimize the kernel for use on sn2 based
106 systems, but the resulting kernel binary will not run on other
107 types of ia64 systems. If you have an SGI Altix system, it's safe
108 to select this option. If in doubt, select ia64 generic support
117 prompt "Processor type"
123 Select your IA-64 processor type. The default is Itanium.
124 This choice is safe for all IA-64 systems, but may not perform
125 optimally on systems with, say, Itanium 2 or newer processors.
130 Select this to configure for an Itanium 2 (McKinley) processor.
135 prompt "Kernel page size"
136 default IA64_PAGE_SIZE_16KB
138 config IA64_PAGE_SIZE_4KB
141 This lets you select the page size of the kernel. For best IA-64
142 performance, a page size of 8KB or 16KB is recommended. For best
143 IA-32 compatibility, a page size of 4KB should be selected (the vast
144 majority of IA-32 binaries work perfectly fine with a larger page
145 size). For Itanium 2 or newer systems, a page size of 64KB can also
148 4KB For best IA-32 compatibility
149 8KB For best IA-64 performance
150 16KB For best IA-64 performance
151 64KB Requires Itanium 2 or newer processor.
153 If you don't know what to do, choose 16KB.
155 config IA64_PAGE_SIZE_8KB
158 config IA64_PAGE_SIZE_16KB
161 config IA64_PAGE_SIZE_64KB
167 source kernel/Kconfig.hz
174 # align cache-sensitive data to 128 bytes
175 config IA64_L1_CACHE_SHIFT
177 default "7" if MCKINLEY
178 default "6" if ITANIUM
180 # align cache-sensitive data to 64 bytes
182 bool "Cyclone (EXA) Time Source support"
184 Say Y here to enable support for IBM EXA Cyclone time source.
185 If you're unsure, answer N.
189 depends on !IA64_HP_SIM
192 config IA64_SGI_SN_XP
193 tristate "Support communication between SGI SSIs"
194 depends on IA64_GENERIC || IA64_SGI_SN2
195 select IA64_UNCACHED_ALLOCATOR
197 An SGI machine can be divided into multiple Single System
198 Images which act independently of each other and have
199 hardware based memory protection from the others. Enabling
200 this feature will allow for direct communication between SSIs
201 based on a network adapter and DMA messaging.
203 config FORCE_MAX_ZONEORDER
204 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
205 range 11 17 if !HUGETLB_PAGE
206 default "17" if HUGETLB_PAGE
210 bool "Symmetric multi-processing support"
212 This enables support for systems with more than one CPU. If you have
213 a system with only one CPU, say N. If you have a system with more
216 If you say N here, the kernel will run on single and multiprocessor
217 systems, but will use only one CPU of a multiprocessor system. If
218 you say Y here, the kernel will run on many, but not all,
219 single processor systems. On a single processor system, the kernel
220 will run faster if you say N here.
222 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
223 available at <http://www.tldp.org/docs.html#howto>.
225 If you don't know what to do here, say N.
228 int "Maximum number of CPUs (2-1024)"
233 You should set this to the number of CPUs in your system, but
234 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
235 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
236 than 64 will cause the use of a CPU mask array, causing a small
240 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
241 depends on SMP && EXPERIMENTAL
245 Say Y here to experiment with turning CPUs off and on. CPUs
246 can be controlled through /sys/devices/system/cpu/cpu#.
247 Say N if you want to disable CPU hotplug.
250 bool "SMT scheduler support"
254 Improves the CPU scheduler's decision making when dealing with
255 Intel IA64 chips with MultiThreading at a cost of slightly increased
256 overhead in some places. If unsure say N here.
259 bool "Preemptible Kernel"
261 This option reduces the latency of the kernel when reacting to
262 real-time or interactive events by allowing a low priority process to
263 be preempted even if it is in kernel mode executing a system call.
264 This allows applications to run more reliably even when the system is
267 Say Y here if you are building a kernel for a desktop, embedded
268 or real-time system. Say N if you are unsure.
272 config ARCH_SELECT_MEMORY_MODEL
275 config ARCH_DISCONTIGMEM_ENABLE
278 Say Y to support efficient handling of discontiguous physical memory,
279 for architectures which are either NUMA (Non-Uniform Memory Access)
280 or have huge holes in the physical address space for other reasons.
281 See <file:Documentation/vm/numa> for more.
283 config ARCH_FLATMEM_ENABLE
286 config ARCH_SPARSEMEM_ENABLE
288 depends on ARCH_DISCONTIGMEM_ENABLE
290 config ARCH_DISCONTIGMEM_DEFAULT
291 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
292 depends on ARCH_DISCONTIGMEM_ENABLE
296 depends on !IA64_HP_SIM && !FLATMEM
297 default y if IA64_SGI_SN2
299 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
300 Access). This option is for configuring high-end multiprocessor
301 server systems. If in doubt, say N.
303 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
304 # VIRTUAL_MEM_MAP has been retained for historical reasons.
305 config VIRTUAL_MEM_MAP
306 bool "Virtual mem map"
307 depends on !SPARSEMEM
308 default y if !IA64_HP_SIM
310 Say Y to compile the kernel with support for a virtual mem map.
311 This code also only takes effect if a memory hole of greater than
312 1 Gb is found during boot. You must turn this option on if you
313 require the DISCONTIGMEM option for your machine. If you are
318 default y if VIRTUAL_MEM_MAP
320 config HAVE_ARCH_EARLY_PFN_TO_NID
322 depends on NEED_MULTIPLE_NODES
325 bool "Support for Linux/x86 binaries"
327 IA-64 processors can execute IA-32 (X86) instructions. By
328 saying Y here, the kernel will include IA-32 system call
329 emulation support which makes it possible to transparently
330 run IA-32 Linux binaries on an IA-64 Linux system.
335 depends on IA32_SUPPORT
338 config IA64_MCA_RECOVERY
339 tristate "MCA recovery from errors other than TLB."
342 bool "Performance monitor support"
344 Selects whether support for the IA-64 performance monitor hardware
345 is included in the kernel. This makes some kernel data-structures a
346 little bigger and slows down execution a bit, but it is generally
347 a good idea to turn this on. If you're unsure, say Y.
350 tristate "/proc/pal support"
352 If you say Y here, you are able to get PAL (Processor Abstraction
353 Layer) information in /proc/pal. This contains useful information
354 about the processors in your systems, such as cache and TLB sizes
355 and the PAL firmware version in use.
357 To use this option, you have to ensure that the "/proc file system
358 support" (CONFIG_PROC_FS) is enabled, too.
360 source "drivers/firmware/Kconfig"
362 source "fs/Kconfig.binfmt"
366 menu "Power management and ACPI"
368 source "kernel/power/Kconfig"
370 source "drivers/acpi/Kconfig"
374 source "arch/ia64/kernel/cpufreq/Kconfig"
382 menu "Bus options (PCI, PCMCIA)"
387 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
388 here unless you are using a simulator without PCI support.
394 source "drivers/pci/Kconfig"
396 source "drivers/pci/hotplug/Kconfig"
398 source "drivers/pcmcia/Kconfig"
406 source "drivers/Kconfig"
413 # Use the generic interrupt handling code in kernel/irq/:
415 config GENERIC_HARDIRQS
419 config GENERIC_IRQ_PROBE
423 config GENERIC_PENDING_IRQ
425 depends on GENERIC_HARDIRQS && SMP
428 source "arch/ia64/hp/sim/Kconfig"
430 menu "Instrumentation Support"
431 depends on EXPERIMENTAL
433 source "arch/ia64/oprofile/Kconfig"
436 bool "Kprobes (EXPERIMENTAL)"
438 Kprobes allows you to trap at almost any kernel address and
439 execute a callback function. register_kprobe() establishes
440 a probepoint and specifies the callback. Kprobes is useful
441 for kernel debugging, non-intrusive instrumentation and testing.
442 If in doubt, say "N".
445 source "arch/ia64/Kconfig.debug"
447 source "security/Kconfig"
449 source "crypto/Kconfig"