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>.
29 config RWSEM_XCHGADD_ALGORITHM
33 config GENERIC_CALIBRATE_DELAY
37 config TIME_INTERPOLATION
49 config SCHED_NO_NO_OMIT_FRAME_POINTER
53 config IA64_UNCACHED_ALLOCATOR
55 select GENERIC_ALLOCATOR
67 This selects the system type of your hardware. A "generic" kernel
68 will run on any supported IA-64 system. However, if you configure
69 a kernel for your specific system, it will be faster and smaller.
71 generic For any supported IA-64 system
72 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
73 HP-zx1/sx1000 For HP systems
74 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
75 SGI-SN2 For SGI Altix systems
76 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
78 If you don't know what to do, choose "generic".
86 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
87 support for the HP I/O MMU.
89 config IA64_HP_ZX1_SWIOTLB
90 bool "HP-zx1/sx1000 with software I/O TLB"
92 Build a kernel that runs on HP zx1 and sx1000 systems even when they
93 have broken PCI devices which cannot DMA to full 32 bits. Apart
94 from support for the HP I/O MMU, this includes support for the software
95 I/O TLB, which allows supporting the broken devices at the expense of
96 wasting some kernel memory (about 2MB by default).
101 Selecting this option will optimize the kernel for use on sn2 based
102 systems, but the resulting kernel binary will not run on other
103 types of ia64 systems. If you have an SGI Altix system, it's safe
104 to select this option. If in doubt, select ia64 generic support
113 prompt "Processor type"
119 Select your IA-64 processor type. The default is Itanium.
120 This choice is safe for all IA-64 systems, but may not perform
121 optimally on systems with, say, Itanium 2 or newer processors.
126 Select this to configure for an Itanium 2 (McKinley) processor.
131 prompt "Kernel page size"
132 default IA64_PAGE_SIZE_16KB
134 config IA64_PAGE_SIZE_4KB
137 This lets you select the page size of the kernel. For best IA-64
138 performance, a page size of 8KB or 16KB is recommended. For best
139 IA-32 compatibility, a page size of 4KB should be selected (the vast
140 majority of IA-32 binaries work perfectly fine with a larger page
141 size). For Itanium 2 or newer systems, a page size of 64KB can also
144 4KB For best IA-32 compatibility
145 8KB For best IA-64 performance
146 16KB For best IA-64 performance
147 64KB Requires Itanium 2 or newer processor.
149 If you don't know what to do, choose 16KB.
151 config IA64_PAGE_SIZE_8KB
154 config IA64_PAGE_SIZE_16KB
157 config IA64_PAGE_SIZE_64KB
163 source kernel/Kconfig.hz
170 # align cache-sensitive data to 128 bytes
171 config IA64_L1_CACHE_SHIFT
173 default "7" if MCKINLEY
174 default "6" if ITANIUM
176 # align cache-sensitive data to 64 bytes
178 bool "Cyclone (EXA) Time Source support"
180 Say Y here to enable support for IBM EXA Cyclone time source.
181 If you're unsure, answer N.
185 depends on !IA64_HP_SIM
188 config IA64_SGI_SN_XP
189 tristate "Support communication between SGI SSIs"
190 select IA64_UNCACHED_ALLOCATOR
192 An SGI machine can be divided into multiple Single System
193 Images which act independently of each other and have
194 hardware based memory protection from the others. Enabling
195 this feature will allow for direct communication between SSIs
196 based on a network adapter and DMA messaging.
198 config FORCE_MAX_ZONEORDER
199 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
200 range 11 17 if !HUGETLB_PAGE
201 default "17" if HUGETLB_PAGE
205 bool "Symmetric multi-processing support"
207 This enables support for systems with more than one CPU. If you have
208 a system with only one CPU, say N. If you have a system with more
211 If you say N here, the kernel will run on single and multiprocessor
212 systems, but will use only one CPU of a multiprocessor system. If
213 you say Y here, the kernel will run on many, but not all,
214 single processor systems. On a single processor system, the kernel
215 will run faster if you say N here.
217 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
218 available at <http://www.tldp.org/docs.html#howto>.
220 If you don't know what to do here, say N.
223 int "Maximum number of CPUs (2-1024)"
228 You should set this to the number of CPUs in your system, but
229 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
230 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
231 than 64 will cause the use of a CPU mask array, causing a small
235 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
236 depends on SMP && EXPERIMENTAL
240 Say Y here to experiment with turning CPUs off and on. CPUs
241 can be controlled through /sys/devices/system/cpu/cpu#.
242 Say N if you want to disable CPU hotplug.
245 bool "SMT scheduler support"
249 Improves the CPU scheduler's decision making when dealing with
250 Intel IA64 chips with MultiThreading at a cost of slightly increased
251 overhead in some places. If unsure say N here.
254 bool "Preemptible Kernel"
256 This option reduces the latency of the kernel when reacting to
257 real-time or interactive events by allowing a low priority process to
258 be preempted even if it is in kernel mode executing a system call.
259 This allows applications to run more reliably even when the system is
262 Say Y here if you are building a kernel for a desktop, embedded
263 or real-time system. Say N if you are unsure.
267 config ARCH_SELECT_MEMORY_MODEL
270 config ARCH_DISCONTIGMEM_ENABLE
273 Say Y to support efficient handling of discontiguous physical memory,
274 for architectures which are either NUMA (Non-Uniform Memory Access)
275 or have huge holes in the physical address space for other reasons.
276 See <file:Documentation/vm/numa> for more.
278 config ARCH_FLATMEM_ENABLE
281 config ARCH_SPARSEMEM_ENABLE
283 depends on ARCH_DISCONTIGMEM_ENABLE
285 config ARCH_DISCONTIGMEM_DEFAULT
286 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
287 depends on ARCH_DISCONTIGMEM_ENABLE
291 depends on !IA64_HP_SIM && !FLATMEM
292 default y if IA64_SGI_SN2
294 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
295 Access). This option is for configuring high-end multiprocessor
296 server systems. If in doubt, say N.
298 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
299 # VIRTUAL_MEM_MAP has been retained for historical reasons.
300 config VIRTUAL_MEM_MAP
301 bool "Virtual mem map"
302 depends on !SPARSEMEM
303 default y if !IA64_HP_SIM
305 Say Y to compile the kernel with support for a virtual mem map.
306 This code also only takes effect if a memory hole of greater than
307 1 Gb is found during boot. You must turn this option on if you
308 require the DISCONTIGMEM option for your machine. If you are
313 default y if VIRTUAL_MEM_MAP
315 config HAVE_ARCH_EARLY_PFN_TO_NID
317 depends on NEED_MULTIPLE_NODES
320 bool "Support for Linux/x86 binaries"
322 IA-64 processors can execute IA-32 (X86) instructions. By
323 saying Y here, the kernel will include IA-32 system call
324 emulation support which makes it possible to transparently
325 run IA-32 Linux binaries on an IA-64 Linux system.
330 depends on IA32_SUPPORT
333 config IA64_MCA_RECOVERY
334 tristate "MCA recovery from errors other than TLB."
337 bool "Performance monitor support"
339 Selects whether support for the IA-64 performance monitor hardware
340 is included in the kernel. This makes some kernel data-structures a
341 little bigger and slows down execution a bit, but it is generally
342 a good idea to turn this on. If you're unsure, say Y.
345 tristate "/proc/pal support"
347 If you say Y here, you are able to get PAL (Processor Abstraction
348 Layer) information in /proc/pal. This contains useful information
349 about the processors in your systems, such as cache and TLB sizes
350 and the PAL firmware version in use.
352 To use this option, you have to ensure that the "/proc file system
353 support" (CONFIG_PROC_FS) is enabled, too.
355 source "drivers/firmware/Kconfig"
357 source "fs/Kconfig.binfmt"
361 menu "Power management and ACPI"
363 source "kernel/power/Kconfig"
365 source "drivers/acpi/Kconfig"
369 source "arch/ia64/kernel/cpufreq/Kconfig"
377 menu "Bus options (PCI, PCMCIA)"
382 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
383 here unless you are using a simulator without PCI support.
389 source "drivers/pci/Kconfig"
391 source "drivers/pci/hotplug/Kconfig"
393 source "drivers/pcmcia/Kconfig"
401 source "drivers/Kconfig"
408 # Use the generic interrupt handling code in kernel/irq/:
410 config GENERIC_HARDIRQS
414 config GENERIC_IRQ_PROBE
418 config GENERIC_PENDING_IRQ
420 depends on GENERIC_HARDIRQS && SMP
423 source "arch/ia64/hp/sim/Kconfig"
425 source "arch/ia64/oprofile/Kconfig"
427 source "arch/ia64/Kconfig.debug"
429 source "security/Kconfig"
431 source "crypto/Kconfig"