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"
16 SPARC is a family of RISC microprocessors designed and marketed by
17 Sun Microsystems, incorporated. This port covers the newer 64-bit
18 UltraSPARC. The UltraLinux project maintains both the SPARC32 and
19 SPARC64 ports; its web page is available at
20 <http://www.ultralinux.org/>.
26 config GENERIC_CMOS_UPDATE
30 config GENERIC_CLOCKEVENTS
45 config STACKTRACE_SUPPORT
49 config LOCKDEP_SUPPORT
53 config ARCH_MAY_HAVE_PC_FDC
57 config ARCH_HAS_ILOG2_U32
61 config ARCH_HAS_ILOG2_U64
69 config HAVE_SETUP_PER_CPU_AREA
72 config ARCH_NO_VIRT_TO_BUS
78 config GENERIC_HARDIRQS_NO__DO_IRQ
83 prompt "Kernel page size"
84 default SPARC64_PAGE_SIZE_8KB
86 config SPARC64_PAGE_SIZE_8KB
89 This lets you select the page size of the kernel.
91 8KB and 64KB work quite well, since Sparc ELF sections
92 provide for up to 64KB alignment.
94 Therefore, 512KB and 4MB are for expert hackers only.
96 If you don't know what to do, choose 8KB.
98 config SPARC64_PAGE_SIZE_64KB
101 config SPARC64_PAGE_SIZE_512KB
104 config SPARC64_PAGE_SIZE_4MB
110 bool "Enable seccomp to safely compute untrusted bytecode"
114 This kernel feature is useful for number crunching applications
115 that may need to compute untrusted bytecode during their
116 execution. By using pipes or other transports made available to
117 the process as file descriptors supporting the read/write
118 syscalls, it's possible to isolate those applications in
119 their own address space using seccomp. Once seccomp is
120 enabled via /proc/<pid>/seccomp, it cannot be disabled
121 and the task is only allowed to execute a few safe syscalls
122 defined by each seccomp mode.
124 If unsure, say Y. Only embedded should say N here.
126 source kernel/Kconfig.hz
129 bool "Support for hot-pluggable CPUs"
133 Say Y here to experiment with turning CPUs off and on. CPUs
134 can be controlled through /sys/devices/system/cpu/cpu#.
135 Say N if you want to disable CPU hotplug.
137 source "init/Kconfig"
139 config SYSVIPC_COMPAT
141 depends on COMPAT && SYSVIPC
144 config GENERIC_HARDIRQS
148 menu "General machine setup"
150 source "kernel/time/Kconfig"
153 bool "Symmetric multi-processing support"
155 This enables support for systems with more than one CPU. If you have
156 a system with only one CPU, say N. If you have a system with more than
159 If you say N here, the kernel will run on single and multiprocessor
160 machines, but will use only one CPU of a multiprocessor machine. If
161 you say Y here, the kernel will run on many, but not all,
162 singleprocessor machines. On a singleprocessor machine, the kernel
163 will run faster if you say N here.
165 People using multiprocessor machines who say Y here should also say
166 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
167 Management" code will be disabled if you say Y here.
169 See also the <file:Documentation/smp.txt>,
170 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
171 <http://www.tldp.org/docs.html#howto>.
173 If you don't know what to do here, say N.
176 int "Maximum number of CPUs (2-1024)"
181 source "drivers/cpufreq/Kconfig"
184 tristate "UltraSPARC-III CPU Frequency driver"
186 select CPU_FREQ_TABLE
188 This adds the CPUFreq driver for UltraSPARC-III processors.
190 For details, take a look at <file:Documentation/cpu-freq>.
195 tristate "UltraSPARC-IIe CPU Frequency driver"
197 select CPU_FREQ_TABLE
199 This adds the CPUFreq driver for UltraSPARC-IIe processors.
201 For details, take a look at <file:Documentation/cpu-freq>.
205 # Global things across all Sun machines.
206 config GENERIC_LOCKBREAK
209 depends on SMP && PREEMPT
211 config RWSEM_GENERIC_SPINLOCK
214 config RWSEM_XCHGADD_ALGORITHM
218 config GENERIC_FIND_NEXT_BIT
222 config GENERIC_HWEIGHT
224 default y if !ULTRA_HAS_POPULATION_COUNT
226 config GENERIC_CALIBRATE_DELAY
231 prompt "SPARC64 Huge TLB Page Size"
232 depends on HUGETLB_PAGE
233 default HUGETLB_PAGE_SIZE_4MB
235 config HUGETLB_PAGE_SIZE_4MB
238 config HUGETLB_PAGE_SIZE_512K
239 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
242 config HUGETLB_PAGE_SIZE_64K
243 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
250 config ARCH_SELECT_MEMORY_MODEL
253 config ARCH_SPARSEMEM_ENABLE
255 select SPARSEMEM_VMEMMAP_ENABLE
257 config ARCH_SPARSEMEM_DEFAULT
265 Find out whether you have ISA slots on your motherboard. ISA is the
266 name of a bus system, i.e. the way the CPU talks to the other stuff
267 inside your box. Other bus systems are PCI, EISA, MicroChannel
268 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
269 newer boards don't support it. If you have ISA, say Y, otherwise N.
274 Say Y here if you would like support for ISA Plug and Play devices.
275 Some information is in <file:Documentation/isapnp.txt>.
277 To compile this driver as a module, choose M here: the
278 module will be called isapnp.
285 The Extended Industry Standard Architecture (EISA) bus was
286 developed as an open alternative to the IBM MicroChannel bus.
288 The EISA bus provided some of the features of the IBM MicroChannel
289 bus while maintaining backward compatibility with cards made for
290 the older ISA bus. The EISA bus saw limited use between 1988 and
291 1995 when it was made obsolete by the PCI bus.
293 Say Y here if you are building a kernel for an EISA-based machine.
300 MicroChannel Architecture is found in some IBM PS/2 machines and
301 laptops. It is a bus system similar to PCI or ISA. See
302 <file:Documentation/mca.txt> (and especially the web page given
303 there) before attempting to build an MCA bus kernel.
308 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
309 computer. These are credit-card size devices such as network cards,
310 modems or hard drives often used with laptops computers. There are
311 actually two varieties of these cards: the older 16 bit PCMCIA cards
312 and the newer 32 bit CardBus cards. If you want to use CardBus
313 cards, you need to say Y here and also to "CardBus support" below.
315 To use your PC-cards, you will need supporting software from David
316 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
317 for location). Please also read the PCMCIA-HOWTO, available from
318 <http://www.tldp.org/docs.html#howto>.
320 To compile this driver as modules, choose M here: the
321 modules will be called pcmcia_core and ds.
340 bool "Sun Logical Domains support"
342 Say Y here is you want to support virtual devices via
347 select ARCH_SUPPORTS_MSI
349 Find out whether you have a PCI motherboard. PCI is the name of a
350 bus system, i.e. the way the CPU talks to the other stuff inside
351 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
352 VESA. If you have PCI, say Y, otherwise N.
354 The PCI-HOWTO, available from
355 <http://www.tldp.org/docs.html#howto>, contains valuable
356 information about which PCI hardware does work under Linux and which
365 source "drivers/pci/Kconfig"
367 config SUN_OPENPROMFS
368 tristate "Openprom tree appears in /proc/openprom"
370 If you say Y, the OpenPROM device tree will be available as a
371 virtual file system, which you can mount to /proc/openprom by "mount
372 -t openpromfs none /proc/openprom".
374 To compile the /proc/openprom support as a module, choose M here: the
375 module will be called openpromfs. If unsure, choose M.
377 config SPARC32_COMPAT
378 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
380 This allows you to run 32-bit binaries on your Ultra.
381 Everybody wants this; say Y.
385 depends on SPARC32_COMPAT
389 bool "Kernel support for 32-bit ELF binaries"
390 depends on SPARC32_COMPAT
392 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
393 Everybody wants this; say Y.
396 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
397 depends on SPARC32_COMPAT
399 This allows you to run 32-bit a.out format binaries on your Ultra.
400 If you want to run SunOS binaries (see SunOS binary emulation below)
401 or other a.out binaries, say Y. If unsure, say N.
403 menu "Executable file formats"
405 source "fs/Kconfig.binfmt"
408 bool "SunOS binary emulation"
409 depends on BINFMT_AOUT32
411 This allows you to run most SunOS binaries. If you want to do this,
412 say Y here and place appropriate files in /usr/gnemul/sunos. See
413 <http://www.ultralinux.org/faq.html> for more information. If you
414 want to run SunOS binaries on an Ultra you must also say Y to
415 "Kernel support for 32-bit a.out binaries" above.
418 tristate "Solaris binary emulation (EXPERIMENTAL)"
419 depends on SPARC32_COMPAT && NET && EXPERIMENTAL
421 This is experimental code which will enable you to run (many)
422 Solaris binaries on your SPARC Linux machine.
424 To compile this code as a module, choose M here: the
425 module will be called solaris.
430 bool "SMT (Hyperthreading) scheduler support"
434 SMT scheduler support improves the CPU scheduler's decision making
435 when dealing with UltraSPARC cpus at a cost of slightly increased
436 overhead in some places. If unsure say N here.
439 bool "Multi-core scheduler support"
443 Multi-core scheduler support improves the CPU scheduler's decision
444 making when dealing with multi-core CPU chips at a cost of slightly
445 increased overhead in some places. If unsure say N here.
447 source "kernel/Kconfig.preempt"
450 bool "Default bootloader kernel arguments"
453 string "Initial kernel command string"
454 depends on CMDLINE_BOOL
455 default "console=ttyS0,9600 root=/dev/sda1"
457 Say Y here if you want to be able to pass default arguments to
458 the kernel. This will be overridden by the bootloader, if you
459 use one (such as SILO). This is most useful if you want to boot
460 a kernel from TFTP, and want default options to be available
461 with having them passed on the command line.
463 NOTE: This option WILL override the PROM bootargs setting!
467 source "drivers/Kconfig"
469 source "drivers/sbus/char/Kconfig"
473 source "kernel/Kconfig.instrumentation"
475 source "arch/sparc64/Kconfig.debug"
477 source "security/Kconfig"
479 source "crypto/Kconfig"