1 # $Id: config.in,v 1.158 2002/01/24 22:14:44 davem Exp $
2 # For a description of the syntax of this configuration file,
3 # see the Configure script.
6 mainmenu "Linux/UltraSPARC Kernel Configuration"
18 SPARC is a family of RISC microprocessors designed and marketed by
19 Sun Microsystems, incorporated. This port covers the newer 64-bit
20 UltraSPARC. The UltraLinux project maintains both the SPARC32 and
21 SPARC64 ports; its web page is available at
22 <http://www.ultralinux.org/>.
28 config GENERIC_CMOS_UPDATE
32 config GENERIC_CLOCKEVENTS
47 config STACKTRACE_SUPPORT
51 config LOCKDEP_SUPPORT
55 config ARCH_MAY_HAVE_PC_FDC
59 config ARCH_HAS_ILOG2_U32
63 config ARCH_HAS_ILOG2_U64
71 config HAVE_SETUP_PER_CPU_AREA
74 config ARCH_NO_VIRT_TO_BUS
80 config GENERIC_HARDIRQS_NO__DO_IRQ
85 prompt "Kernel page size"
86 default SPARC64_PAGE_SIZE_8KB
88 config SPARC64_PAGE_SIZE_8KB
91 This lets you select the page size of the kernel.
93 8KB and 64KB work quite well, since Sparc ELF sections
94 provide for up to 64KB alignment.
96 Therefore, 512KB and 4MB are for expert hackers only.
98 If you don't know what to do, choose 8KB.
100 config SPARC64_PAGE_SIZE_64KB
103 config SPARC64_PAGE_SIZE_512KB
106 config SPARC64_PAGE_SIZE_4MB
112 bool "Enable seccomp to safely compute untrusted bytecode"
116 This kernel feature is useful for number crunching applications
117 that may need to compute untrusted bytecode during their
118 execution. By using pipes or other transports made available to
119 the process as file descriptors supporting the read/write
120 syscalls, it's possible to isolate those applications in
121 their own address space using seccomp. Once seccomp is
122 enabled via /proc/<pid>/seccomp, it cannot be disabled
123 and the task is only allowed to execute a few safe syscalls
124 defined by each seccomp mode.
126 If unsure, say Y. Only embedded should say N here.
128 source kernel/Kconfig.hz
131 bool "Support for hot-pluggable CPUs"
135 Say Y here to experiment with turning CPUs off and on. CPUs
136 can be controlled through /sys/devices/system/cpu/cpu#.
137 Say N if you want to disable CPU hotplug.
139 source "init/Kconfig"
141 config SYSVIPC_COMPAT
143 depends on COMPAT && SYSVIPC
146 config GENERIC_HARDIRQS
150 menu "General machine setup"
152 source "kernel/time/Kconfig"
155 bool "Symmetric multi-processing support"
157 This enables support for systems with more than one CPU. If you have
158 a system with only one CPU, say N. If you have a system with more than
161 If you say N here, the kernel will run on single and multiprocessor
162 machines, but will use only one CPU of a multiprocessor machine. If
163 you say Y here, the kernel will run on many, but not all,
164 singleprocessor machines. On a singleprocessor machine, the kernel
165 will run faster if you say N here.
167 People using multiprocessor machines who say Y here should also say
168 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
169 Management" code will be disabled if you say Y here.
171 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
172 available at <http://www.tldp.org/docs.html#howto>.
174 If you don't know what to do here, say N.
177 int "Maximum number of CPUs (2-1024)"
182 source "drivers/cpufreq/Kconfig"
185 tristate "UltraSPARC-III CPU Frequency driver"
187 select CPU_FREQ_TABLE
189 This adds the CPUFreq driver for UltraSPARC-III processors.
191 For details, take a look at <file:Documentation/cpu-freq>.
196 tristate "UltraSPARC-IIe CPU Frequency driver"
198 select CPU_FREQ_TABLE
200 This adds the CPUFreq driver for UltraSPARC-IIe processors.
202 For details, take a look at <file:Documentation/cpu-freq>.
206 # Global things across all Sun machines.
207 config GENERIC_LOCKBREAK
210 depends on SMP && PREEMPT
212 config RWSEM_GENERIC_SPINLOCK
215 config RWSEM_XCHGADD_ALGORITHM
219 config GENERIC_FIND_NEXT_BIT
223 config GENERIC_HWEIGHT
225 default y if !ULTRA_HAS_POPULATION_COUNT
227 config GENERIC_CALIBRATE_DELAY
232 prompt "SPARC64 Huge TLB Page Size"
233 depends on HUGETLB_PAGE
234 default HUGETLB_PAGE_SIZE_4MB
236 config HUGETLB_PAGE_SIZE_4MB
239 config HUGETLB_PAGE_SIZE_512K
240 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
243 config HUGETLB_PAGE_SIZE_64K
244 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
251 config ARCH_SELECT_MEMORY_MODEL
254 config ARCH_SPARSEMEM_ENABLE
256 select SPARSEMEM_VMEMMAP_ENABLE
258 config ARCH_SPARSEMEM_DEFAULT
266 Find out whether you have ISA slots on your motherboard. ISA is the
267 name of a bus system, i.e. the way the CPU talks to the other stuff
268 inside your box. Other bus systems are PCI, EISA, MicroChannel
269 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
270 newer boards don't support it. If you have ISA, say Y, otherwise N.
275 Say Y here if you would like support for ISA Plug and Play devices.
276 Some information is in <file:Documentation/isapnp.txt>.
278 To compile this driver as a module, choose M here: the
279 module will be called isapnp.
286 The Extended Industry Standard Architecture (EISA) bus was
287 developed as an open alternative to the IBM MicroChannel bus.
289 The EISA bus provided some of the features of the IBM MicroChannel
290 bus while maintaining backward compatibility with cards made for
291 the older ISA bus. The EISA bus saw limited use between 1988 and
292 1995 when it was made obsolete by the PCI bus.
294 Say Y here if you are building a kernel for an EISA-based machine.
301 MicroChannel Architecture is found in some IBM PS/2 machines and
302 laptops. It is a bus system similar to PCI or ISA. See
303 <file:Documentation/mca.txt> (and especially the web page given
304 there) before attempting to build an MCA bus kernel.
309 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
310 computer. These are credit-card size devices such as network cards,
311 modems or hard drives often used with laptops computers. There are
312 actually two varieties of these cards: the older 16 bit PCMCIA cards
313 and the newer 32 bit CardBus cards. If you want to use CardBus
314 cards, you need to say Y here and also to "CardBus support" below.
316 To use your PC-cards, you will need supporting software from David
317 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
318 for location). Please also read the PCMCIA-HOWTO, available from
319 <http://www.tldp.org/docs.html#howto>.
321 To compile this driver as modules, choose M here: the
322 modules will be called pcmcia_core and ds.
341 bool "Sun Logical Domains support"
343 Say Y here is you want to support virtual devices via
348 select ARCH_SUPPORTS_MSI
350 Find out whether you have a PCI motherboard. PCI is the name of a
351 bus system, i.e. the way the CPU talks to the other stuff inside
352 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
353 VESA. If you have PCI, say Y, otherwise N.
361 source "drivers/pci/Kconfig"
363 config SUN_OPENPROMFS
364 tristate "Openprom tree appears in /proc/openprom"
366 If you say Y, the OpenPROM device tree will be available as a
367 virtual file system, which you can mount to /proc/openprom by "mount
368 -t openpromfs none /proc/openprom".
370 To compile the /proc/openprom support as a module, choose M here: the
371 module will be called openpromfs. If unsure, choose M.
373 config SPARC32_COMPAT
374 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
376 This allows you to run 32-bit binaries on your Ultra.
377 Everybody wants this; say Y.
381 depends on SPARC32_COMPAT
385 bool "Kernel support for 32-bit ELF binaries"
386 depends on SPARC32_COMPAT
388 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
389 Everybody wants this; say Y.
392 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
393 depends on SPARC32_COMPAT
395 This allows you to run 32-bit a.out format binaries on your Ultra.
396 If you want to run SunOS binaries (see SunOS binary emulation below)
397 or other a.out binaries, say Y. If unsure, say N.
399 menu "Executable file formats"
401 source "fs/Kconfig.binfmt"
404 bool "SunOS binary emulation"
405 depends on BINFMT_AOUT32
407 This allows you to run most SunOS binaries. If you want to do this,
408 say Y here and place appropriate files in /usr/gnemul/sunos. See
409 <http://www.ultralinux.org/faq.html> for more information. If you
410 want to run SunOS binaries on an Ultra you must also say Y to
411 "Kernel support for 32-bit a.out binaries" above.
414 tristate "Solaris binary emulation (EXPERIMENTAL)"
415 depends on SPARC32_COMPAT && NET && EXPERIMENTAL
417 This is experimental code which will enable you to run (many)
418 Solaris binaries on your SPARC Linux machine.
420 To compile this code as a module, choose M here: the
421 module will be called solaris.
426 bool "SMT (Hyperthreading) scheduler support"
430 SMT scheduler support improves the CPU scheduler's decision making
431 when dealing with UltraSPARC cpus at a cost of slightly increased
432 overhead in some places. If unsure say N here.
435 bool "Multi-core scheduler support"
439 Multi-core scheduler support improves the CPU scheduler's decision
440 making when dealing with multi-core CPU chips at a cost of slightly
441 increased overhead in some places. If unsure say N here.
443 source "kernel/Kconfig.preempt"
446 bool "Default bootloader kernel arguments"
449 string "Initial kernel command string"
450 depends on CMDLINE_BOOL
451 default "console=ttyS0,9600 root=/dev/sda1"
453 Say Y here if you want to be able to pass default arguments to
454 the kernel. This will be overridden by the bootloader, if you
455 use one (such as SILO). This is most useful if you want to boot
456 a kernel from TFTP, and want default options to be available
457 with having them passed on the command line.
459 NOTE: This option WILL override the PROM bootargs setting!
463 source "drivers/Kconfig"
465 source "drivers/sbus/char/Kconfig"
469 source "arch/sparc64/Kconfig.debug"
471 source "security/Kconfig"
473 source "crypto/Kconfig"