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
66 select VIRTUAL_MEM_MAP
69 This selects the system type of your hardware. A "generic" kernel
70 will run on any supported IA-64 system. However, if you configure
71 a kernel for your specific system, it will be faster and smaller.
73 generic For any supported IA-64 system
74 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
75 HP-zx1/sx1000 For HP systems
76 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
77 SGI-SN2 For SGI Altix systems
78 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
80 If you don't know what to do, choose "generic".
88 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
89 support for the HP I/O MMU.
91 config IA64_HP_ZX1_SWIOTLB
92 bool "HP-zx1/sx1000 with software I/O TLB"
94 Build a kernel that runs on HP zx1 and sx1000 systems even when they
95 have broken PCI devices which cannot DMA to full 32 bits. Apart
96 from support for the HP I/O MMU, this includes support for the software
97 I/O TLB, which allows supporting the broken devices at the expense of
98 wasting some kernel memory (about 2MB by default).
103 Selecting this option will optimize the kernel for use on sn2 based
104 systems, but the resulting kernel binary will not run on other
105 types of ia64 systems. If you have an SGI Altix system, it's safe
106 to select this option. If in doubt, select ia64 generic support
115 prompt "Processor type"
121 Select your IA-64 processor type. The default is Itanium.
122 This choice is safe for all IA-64 systems, but may not perform
123 optimally on systems with, say, Itanium 2 or newer processors.
128 Select this to configure for an Itanium 2 (McKinley) processor.
133 prompt "Kernel page size"
134 default IA64_PAGE_SIZE_16KB
136 config IA64_PAGE_SIZE_4KB
139 This lets you select the page size of the kernel. For best IA-64
140 performance, a page size of 8KB or 16KB is recommended. For best
141 IA-32 compatibility, a page size of 4KB should be selected (the vast
142 majority of IA-32 binaries work perfectly fine with a larger page
143 size). For Itanium 2 or newer systems, a page size of 64KB can also
146 4KB For best IA-32 compatibility
147 8KB For best IA-64 performance
148 16KB For best IA-64 performance
149 64KB Requires Itanium 2 or newer processor.
151 If you don't know what to do, choose 16KB.
153 config IA64_PAGE_SIZE_8KB
156 config IA64_PAGE_SIZE_16KB
159 config IA64_PAGE_SIZE_64KB
165 source kernel/Kconfig.hz
172 # align cache-sensitive data to 128 bytes
173 config IA64_L1_CACHE_SHIFT
175 default "7" if MCKINLEY
176 default "6" if ITANIUM
178 # align cache-sensitive data to 64 bytes
181 depends on !IA64_HP_SIM
182 default y if IA64_SGI_SN2
185 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
186 Access). This option is for configuring high-end multiprocessor
187 server systems. If in doubt, say N.
189 config VIRTUAL_MEM_MAP
190 bool "Virtual mem map"
191 default y if !IA64_HP_SIM
193 Say Y to compile the kernel with support for a virtual mem map.
194 This code also only takes effect if a memory hole of greater than
195 1 Gb is found during boot. You must turn this option on if you
196 require the DISCONTIGMEM option for your machine. If you are
201 default y if VIRTUAL_MEM_MAP
203 config ARCH_DISCONTIGMEM_ENABLE
204 bool "Discontiguous memory support"
205 depends on (IA64_DIG || IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) && NUMA && VIRTUAL_MEM_MAP
206 default y if (IA64_SGI_SN2 || IA64_GENERIC) && NUMA
208 Say Y to support efficient handling of discontiguous physical memory,
209 for architectures which are either NUMA (Non-Uniform Memory Access)
210 or have huge holes in the physical address space for other reasons.
211 See <file:Documentation/vm/numa> for more.
214 bool "Cyclone (EXA) Time Source support"
216 Say Y here to enable support for IBM EXA Cyclone time source.
217 If you're unsure, answer N.
221 depends on !IA64_HP_SIM
224 config IA64_SGI_SN_XP
225 tristate "Support communication between SGI SSIs"
226 select IA64_UNCACHED_ALLOCATOR
228 An SGI machine can be divided into multiple Single System
229 Images which act independently of each other and have
230 hardware based memory protection from the others. Enabling
231 this feature will allow for direct communication between SSIs
232 based on a network adapter and DMA messaging.
234 config FORCE_MAX_ZONEORDER
239 bool "Symmetric multi-processing support"
241 This enables support for systems with more than one CPU. If you have
242 a system with only one CPU, say N. If you have a system with more
245 If you say N here, the kernel will run on single and multiprocessor
246 systems, but will use only one CPU of a multiprocessor system. If
247 you say Y here, the kernel will run on many, but not all,
248 single processor systems. On a single processor system, the kernel
249 will run faster if you say N here.
251 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
252 available at <http://www.tldp.org/docs.html#howto>.
254 If you don't know what to do here, say N.
257 int "Maximum number of CPUs (2-512)"
262 You should set this to the number of CPUs in your system, but
263 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
264 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
265 than 64 will cause the use of a CPU mask array, causing a small
269 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
270 depends on SMP && EXPERIMENTAL
274 Say Y here to experiment with turning CPUs off and on. CPUs
275 can be controlled through /sys/devices/system/cpu/cpu#.
276 Say N if you want to disable CPU hotplug.
279 bool "SMT scheduler support"
283 Improves the CPU scheduler's decision making when dealing with
284 Intel IA64 chips with MultiThreading at a cost of slightly increased
285 overhead in some places. If unsure say N here.
288 bool "Preemptible Kernel"
290 This option reduces the latency of the kernel when reacting to
291 real-time or interactive events by allowing a low priority process to
292 be preempted even if it is in kernel mode executing a system call.
293 This allows applications to run more reliably even when the system is
296 Say Y here if you are building a kernel for a desktop, embedded
297 or real-time system. Say N if you are unsure.
302 bool "Support for Linux/x86 binaries"
304 IA-64 processors can execute IA-32 (X86) instructions. By
305 saying Y here, the kernel will include IA-32 system call
306 emulation support which makes it possible to transparently
307 run IA-32 Linux binaries on an IA-64 Linux system.
312 depends on IA32_SUPPORT
315 config IA64_MCA_RECOVERY
316 tristate "MCA recovery from errors other than TLB."
319 bool "Performance monitor support"
321 Selects whether support for the IA-64 performance monitor hardware
322 is included in the kernel. This makes some kernel data-structures a
323 little bigger and slows down execution a bit, but it is generally
324 a good idea to turn this on. If you're unsure, say Y.
327 tristate "/proc/pal support"
329 If you say Y here, you are able to get PAL (Processor Abstraction
330 Layer) information in /proc/pal. This contains useful information
331 about the processors in your systems, such as cache and TLB sizes
332 and the PAL firmware version in use.
334 To use this option, you have to ensure that the "/proc file system
335 support" (CONFIG_PROC_FS) is enabled, too.
337 source "drivers/firmware/Kconfig"
339 source "fs/Kconfig.binfmt"
343 menu "Power management and ACPI"
345 source "kernel/power/Kconfig"
347 source "drivers/acpi/Kconfig"
351 source "arch/ia64/kernel/cpufreq/Kconfig"
359 menu "Bus options (PCI, PCMCIA)"
364 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
365 here unless you are using a simulator without PCI support.
371 source "drivers/pci/Kconfig"
373 source "drivers/pci/hotplug/Kconfig"
375 source "drivers/pcmcia/Kconfig"
383 source "drivers/Kconfig"
390 # Use the generic interrupt handling code in kernel/irq/:
392 config GENERIC_HARDIRQS
396 config GENERIC_IRQ_PROBE
400 config GENERIC_PENDING_IRQ
402 depends on GENERIC_HARDIRQS && SMP
405 source "arch/ia64/hp/sim/Kconfig"
407 source "arch/ia64/oprofile/Kconfig"
409 source "arch/ia64/Kconfig.debug"
411 source "security/Kconfig"
413 source "crypto/Kconfig"