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
61 config ZONE_DMA_IS_DMA32
75 This selects the system type of your hardware. A "generic" kernel
76 will run on any supported IA-64 system. However, if you configure
77 a kernel for your specific system, it will be faster and smaller.
79 generic For any supported IA-64 system
80 DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
81 HP-zx1/sx1000 For HP systems
82 HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
83 SGI-SN2 For SGI Altix systems
84 Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
86 If you don't know what to do, choose "generic".
94 Build a kernel that runs on HP zx1 and sx1000 systems. This adds
95 support for the HP I/O MMU.
97 config IA64_HP_ZX1_SWIOTLB
98 bool "HP-zx1/sx1000 with software I/O TLB"
100 Build a kernel that runs on HP zx1 and sx1000 systems even when they
101 have broken PCI devices which cannot DMA to full 32 bits. Apart
102 from support for the HP I/O MMU, this includes support for the software
103 I/O TLB, which allows supporting the broken devices at the expense of
104 wasting some kernel memory (about 2MB by default).
109 Selecting this option will optimize the kernel for use on sn2 based
110 systems, but the resulting kernel binary will not run on other
111 types of ia64 systems. If you have an SGI Altix system, it's safe
112 to select this option. If in doubt, select ia64 generic support
121 prompt "Processor type"
127 Select your IA-64 processor type. The default is Itanium.
128 This choice is safe for all IA-64 systems, but may not perform
129 optimally on systems with, say, Itanium 2 or newer processors.
134 Select this to configure for an Itanium 2 (McKinley) processor.
139 prompt "Kernel page size"
140 default IA64_PAGE_SIZE_16KB
142 config IA64_PAGE_SIZE_4KB
145 This lets you select the page size of the kernel. For best IA-64
146 performance, a page size of 8KB or 16KB is recommended. For best
147 IA-32 compatibility, a page size of 4KB should be selected (the vast
148 majority of IA-32 binaries work perfectly fine with a larger page
149 size). For Itanium 2 or newer systems, a page size of 64KB can also
152 4KB For best IA-32 compatibility
153 8KB For best IA-64 performance
154 16KB For best IA-64 performance
155 64KB Requires Itanium 2 or newer processor.
157 If you don't know what to do, choose 16KB.
159 config IA64_PAGE_SIZE_8KB
162 config IA64_PAGE_SIZE_16KB
165 config IA64_PAGE_SIZE_64KB
171 source kernel/Kconfig.hz
178 # align cache-sensitive data to 128 bytes
179 config IA64_L1_CACHE_SHIFT
181 default "7" if MCKINLEY
182 default "6" if ITANIUM
184 # align cache-sensitive data to 64 bytes
186 bool "Cyclone (EXA) Time Source support"
188 Say Y here to enable support for IBM EXA Cyclone time source.
189 If you're unsure, answer N.
193 depends on !IA64_HP_SIM
196 config IA64_SGI_SN_XP
197 tristate "Support communication between SGI SSIs"
198 select IA64_UNCACHED_ALLOCATOR
200 An SGI machine can be divided into multiple Single System
201 Images which act independently of each other and have
202 hardware based memory protection from the others. Enabling
203 this feature will allow for direct communication between SSIs
204 based on a network adapter and DMA messaging.
206 config FORCE_MAX_ZONEORDER
207 int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
208 range 11 17 if !HUGETLB_PAGE
209 default "17" if HUGETLB_PAGE
213 bool "Symmetric multi-processing support"
215 This enables support for systems with more than one CPU. If you have
216 a system with only one CPU, say N. If you have a system with more
219 If you say N here, the kernel will run on single and multiprocessor
220 systems, but will use only one CPU of a multiprocessor system. If
221 you say Y here, the kernel will run on many, but not all,
222 single processor systems. On a single processor system, the kernel
223 will run faster if you say N here.
225 See also the <file:Documentation/smp.txt> and the SMP-HOWTO
226 available at <http://www.tldp.org/docs.html#howto>.
228 If you don't know what to do here, say N.
231 int "Maximum number of CPUs (2-1024)"
236 You should set this to the number of CPUs in your system, but
237 keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
238 only use 2 CPUs on a >2 CPU system. Setting this to a value larger
239 than 64 will cause the use of a CPU mask array, causing a small
243 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
244 depends on SMP && EXPERIMENTAL
248 Say Y here to experiment with turning CPUs off and on. CPUs
249 can be controlled through /sys/devices/system/cpu/cpu#.
250 Say N if you want to disable CPU hotplug.
253 bool "SMT scheduler support"
257 Improves the CPU scheduler's decision making when dealing with
258 Intel IA64 chips with MultiThreading at a cost of slightly increased
259 overhead in some places. If unsure say N here.
262 bool "Preemptible Kernel"
264 This option reduces the latency of the kernel when reacting to
265 real-time or interactive events by allowing a low priority process to
266 be preempted even if it is in kernel mode executing a system call.
267 This allows applications to run more reliably even when the system is
270 Say Y here if you are building a kernel for a desktop, embedded
271 or real-time system. Say N if you are unsure.
275 config ARCH_SELECT_MEMORY_MODEL
278 config ARCH_DISCONTIGMEM_ENABLE
281 Say Y to support efficient handling of discontiguous physical memory,
282 for architectures which are either NUMA (Non-Uniform Memory Access)
283 or have huge holes in the physical address space for other reasons.
284 See <file:Documentation/vm/numa> for more.
286 config ARCH_FLATMEM_ENABLE
289 config ARCH_SPARSEMEM_ENABLE
291 depends on ARCH_DISCONTIGMEM_ENABLE
293 config ARCH_DISCONTIGMEM_DEFAULT
294 def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
295 depends on ARCH_DISCONTIGMEM_ENABLE
299 depends on !IA64_HP_SIM && !FLATMEM
300 default y if IA64_SGI_SN2
302 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
303 Access). This option is for configuring high-end multiprocessor
304 server systems. If in doubt, say N.
306 # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
307 # VIRTUAL_MEM_MAP has been retained for historical reasons.
308 config VIRTUAL_MEM_MAP
309 bool "Virtual mem map"
310 depends on !SPARSEMEM
311 default y if !IA64_HP_SIM
313 Say Y to compile the kernel with support for a virtual mem map.
314 This code also only takes effect if a memory hole of greater than
315 1 Gb is found during boot. You must turn this option on if you
316 require the DISCONTIGMEM option for your machine. If you are
321 default y if VIRTUAL_MEM_MAP
323 config HAVE_ARCH_EARLY_PFN_TO_NID
325 depends on NEED_MULTIPLE_NODES
328 bool "Support for Linux/x86 binaries"
330 IA-64 processors can execute IA-32 (X86) instructions. By
331 saying Y here, the kernel will include IA-32 system call
332 emulation support which makes it possible to transparently
333 run IA-32 Linux binaries on an IA-64 Linux system.
338 depends on IA32_SUPPORT
341 config IA64_MCA_RECOVERY
342 tristate "MCA recovery from errors other than TLB."
345 bool "Performance monitor support"
347 Selects whether support for the IA-64 performance monitor hardware
348 is included in the kernel. This makes some kernel data-structures a
349 little bigger and slows down execution a bit, but it is generally
350 a good idea to turn this on. If you're unsure, say Y.
353 tristate "/proc/pal support"
355 If you say Y here, you are able to get PAL (Processor Abstraction
356 Layer) information in /proc/pal. This contains useful information
357 about the processors in your systems, such as cache and TLB sizes
358 and the PAL firmware version in use.
360 To use this option, you have to ensure that the "/proc file system
361 support" (CONFIG_PROC_FS) is enabled, too.
363 source "drivers/firmware/Kconfig"
365 source "fs/Kconfig.binfmt"
369 menu "Power management and ACPI"
371 source "kernel/power/Kconfig"
373 source "drivers/acpi/Kconfig"
377 source "arch/ia64/kernel/cpufreq/Kconfig"
385 menu "Bus options (PCI, PCMCIA)"
390 Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
391 here unless you are using a simulator without PCI support.
397 source "drivers/pci/Kconfig"
399 source "drivers/pci/hotplug/Kconfig"
401 source "drivers/pcmcia/Kconfig"
409 source "drivers/Kconfig"
416 # Use the generic interrupt handling code in kernel/irq/:
418 config GENERIC_HARDIRQS
422 config GENERIC_IRQ_PROBE
426 config GENERIC_PENDING_IRQ
428 depends on GENERIC_HARDIRQS && SMP
431 source "arch/ia64/hp/sim/Kconfig"
433 source "arch/ia64/oprofile/Kconfig"
435 source "arch/ia64/Kconfig.debug"
437 source "security/Kconfig"
439 source "crypto/Kconfig"