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 ARCH_NO_VIRT_TO_BUS
75 config GENERIC_HARDIRQS_NO__DO_IRQ
80 prompt "Kernel page size"
81 default SPARC64_PAGE_SIZE_8KB
83 config SPARC64_PAGE_SIZE_8KB
86 This lets you select the page size of the kernel.
88 8KB and 64KB work quite well, since Sparc ELF sections
89 provide for up to 64KB alignment.
91 Therefore, 512KB and 4MB are for expert hackers only.
93 If you don't know what to do, choose 8KB.
95 config SPARC64_PAGE_SIZE_64KB
98 config SPARC64_PAGE_SIZE_512KB
101 config SPARC64_PAGE_SIZE_4MB
107 bool "Enable seccomp to safely compute untrusted bytecode"
111 This kernel feature is useful for number crunching applications
112 that may need to compute untrusted bytecode during their
113 execution. By using pipes or other transports made available to
114 the process as file descriptors supporting the read/write
115 syscalls, it's possible to isolate those applications in
116 their own address space using seccomp. Once seccomp is
117 enabled via /proc/<pid>/seccomp, it cannot be disabled
118 and the task is only allowed to execute a few safe syscalls
119 defined by each seccomp mode.
121 If unsure, say Y. Only embedded should say N here.
123 source kernel/Kconfig.hz
126 bool "Support for hot-pluggable CPUs"
130 Say Y here to experiment with turning CPUs off and on. CPUs
131 can be controlled through /sys/devices/system/cpu/cpu#.
132 Say N if you want to disable CPU hotplug.
134 source "init/Kconfig"
136 config SYSVIPC_COMPAT
138 depends on COMPAT && SYSVIPC
141 config GENERIC_HARDIRQS
145 menu "General machine setup"
147 source "kernel/time/Kconfig"
150 bool "Symmetric multi-processing support"
152 This enables support for systems with more than one CPU. If you have
153 a system with only one CPU, say N. If you have a system with more than
156 If you say N here, the kernel will run on single and multiprocessor
157 machines, but will use only one CPU of a multiprocessor machine. If
158 you say Y here, the kernel will run on many, but not all,
159 singleprocessor machines. On a singleprocessor machine, the kernel
160 will run faster if you say N here.
162 People using multiprocessor machines who say Y here should also say
163 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
164 Management" code will be disabled if you say Y here.
166 See also the <file:Documentation/smp.txt>,
167 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
168 <http://www.tldp.org/docs.html#howto>.
170 If you don't know what to do here, say N.
173 int "Maximum number of CPUs (2-1024)"
178 source "drivers/cpufreq/Kconfig"
181 tristate "UltraSPARC-III CPU Frequency driver"
183 select CPU_FREQ_TABLE
185 This adds the CPUFreq driver for UltraSPARC-III processors.
187 For details, take a look at <file:Documentation/cpu-freq>.
192 tristate "UltraSPARC-IIe CPU Frequency driver"
194 select CPU_FREQ_TABLE
196 This adds the CPUFreq driver for UltraSPARC-IIe processors.
198 For details, take a look at <file:Documentation/cpu-freq>.
202 # Global things across all Sun machines.
203 config GENERIC_LOCKBREAK
206 depends on SMP && PREEMPT
208 config RWSEM_GENERIC_SPINLOCK
211 config RWSEM_XCHGADD_ALGORITHM
215 config GENERIC_FIND_NEXT_BIT
219 config GENERIC_HWEIGHT
221 default y if !ULTRA_HAS_POPULATION_COUNT
223 config GENERIC_CALIBRATE_DELAY
228 prompt "SPARC64 Huge TLB Page Size"
229 depends on HUGETLB_PAGE
230 default HUGETLB_PAGE_SIZE_4MB
232 config HUGETLB_PAGE_SIZE_4MB
235 config HUGETLB_PAGE_SIZE_512K
236 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
239 config HUGETLB_PAGE_SIZE_64K
240 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
247 config ARCH_SELECT_MEMORY_MODEL
250 config ARCH_SPARSEMEM_ENABLE
252 select SPARSEMEM_VMEMMAP_ENABLE
254 config ARCH_SPARSEMEM_DEFAULT
262 Find out whether you have ISA slots on your motherboard. ISA is the
263 name of a bus system, i.e. the way the CPU talks to the other stuff
264 inside your box. Other bus systems are PCI, EISA, MicroChannel
265 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
266 newer boards don't support it. If you have ISA, say Y, otherwise N.
271 Say Y here if you would like support for ISA Plug and Play devices.
272 Some information is in <file:Documentation/isapnp.txt>.
274 To compile this driver as a module, choose M here: the
275 module will be called isapnp.
282 The Extended Industry Standard Architecture (EISA) bus was
283 developed as an open alternative to the IBM MicroChannel bus.
285 The EISA bus provided some of the features of the IBM MicroChannel
286 bus while maintaining backward compatibility with cards made for
287 the older ISA bus. The EISA bus saw limited use between 1988 and
288 1995 when it was made obsolete by the PCI bus.
290 Say Y here if you are building a kernel for an EISA-based machine.
297 MicroChannel Architecture is found in some IBM PS/2 machines and
298 laptops. It is a bus system similar to PCI or ISA. See
299 <file:Documentation/mca.txt> (and especially the web page given
300 there) before attempting to build an MCA bus kernel.
305 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
306 computer. These are credit-card size devices such as network cards,
307 modems or hard drives often used with laptops computers. There are
308 actually two varieties of these cards: the older 16 bit PCMCIA cards
309 and the newer 32 bit CardBus cards. If you want to use CardBus
310 cards, you need to say Y here and also to "CardBus support" below.
312 To use your PC-cards, you will need supporting software from David
313 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
314 for location). Please also read the PCMCIA-HOWTO, available from
315 <http://www.tldp.org/docs.html#howto>.
317 To compile this driver as modules, choose M here: the
318 modules will be called pcmcia_core and ds.
337 bool "Sun Logical Domains support"
339 Say Y here is you want to support virtual devices via
344 select ARCH_SUPPORTS_MSI
346 Find out whether you have a PCI motherboard. PCI is the name of a
347 bus system, i.e. the way the CPU talks to the other stuff inside
348 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
349 VESA. If you have PCI, say Y, otherwise N.
351 The PCI-HOWTO, available from
352 <http://www.tldp.org/docs.html#howto>, contains valuable
353 information about which PCI hardware does work under Linux and which
362 source "drivers/pci/Kconfig"
364 config SUN_OPENPROMFS
365 tristate "Openprom tree appears in /proc/openprom"
367 If you say Y, the OpenPROM device tree will be available as a
368 virtual file system, which you can mount to /proc/openprom by "mount
369 -t openpromfs none /proc/openprom".
371 To compile the /proc/openprom support as a module, choose M here: the
372 module will be called openpromfs. If unsure, choose M.
374 config SPARC32_COMPAT
375 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
377 This allows you to run 32-bit binaries on your Ultra.
378 Everybody wants this; say Y.
382 depends on SPARC32_COMPAT
386 bool "Kernel support for 32-bit ELF binaries"
387 depends on SPARC32_COMPAT
389 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
390 Everybody wants this; say Y.
393 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
394 depends on SPARC32_COMPAT
396 This allows you to run 32-bit a.out format binaries on your Ultra.
397 If you want to run SunOS binaries (see SunOS binary emulation below)
398 or other a.out binaries, say Y. If unsure, say N.
400 menu "Executable file formats"
402 source "fs/Kconfig.binfmt"
405 bool "SunOS binary emulation"
406 depends on BINFMT_AOUT32
408 This allows you to run most SunOS binaries. If you want to do this,
409 say Y here and place appropriate files in /usr/gnemul/sunos. See
410 <http://www.ultralinux.org/faq.html> for more information. If you
411 want to run SunOS binaries on an Ultra you must also say Y to
412 "Kernel support for 32-bit a.out binaries" above.
415 tristate "Solaris binary emulation (EXPERIMENTAL)"
416 depends on SPARC32_COMPAT && NET && EXPERIMENTAL
418 This is experimental code which will enable you to run (many)
419 Solaris binaries on your SPARC Linux machine.
421 To compile this code as a module, choose M here: the
422 module will be called solaris.
427 bool "SMT (Hyperthreading) scheduler support"
431 SMT scheduler support improves the CPU scheduler's decision making
432 when dealing with UltraSPARC cpus at a cost of slightly increased
433 overhead in some places. If unsure say N here.
436 bool "Multi-core scheduler support"
440 Multi-core scheduler support improves the CPU scheduler's decision
441 making when dealing with multi-core CPU chips at a cost of slightly
442 increased overhead in some places. If unsure say N here.
444 source "kernel/Kconfig.preempt"
447 bool "Default bootloader kernel arguments"
450 string "Initial kernel command string"
451 depends on CMDLINE_BOOL
452 default "console=ttyS0,9600 root=/dev/sda1"
454 Say Y here if you want to be able to pass default arguments to
455 the kernel. This will be overridden by the bootloader, if you
456 use one (such as SILO). This is most useful if you want to boot
457 a kernel from TFTP, and want default options to be available
458 with having them passed on the command line.
460 NOTE: This option WILL override the PROM bootargs setting!
464 source "drivers/Kconfig"
466 source "drivers/sbus/char/Kconfig"
470 source "kernel/Kconfig.instrumentation"
472 source "arch/sparc64/Kconfig.debug"
474 source "security/Kconfig"
476 source "crypto/Kconfig"