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"
12 SPARC is a family of RISC microprocessors designed and marketed by
13 Sun Microsystems, incorporated. This port covers the newer 64-bit
14 UltraSPARC. The UltraLinux project maintains both the SPARC32 and
15 SPARC64 ports; its web page is available at
16 <http://www.ultralinux.org/>.
25 config TIME_INTERPOLATION
29 config ARCH_MAY_HAVE_PC_FDC
34 prompt "Kernel page size"
35 default SPARC64_PAGE_SIZE_8KB
37 config SPARC64_PAGE_SIZE_8KB
40 This lets you select the page size of the kernel.
42 8KB and 64KB work quite well, since Sparc ELF sections
43 provide for up to 64KB alignment.
45 Therefore, 512KB and 4MB are for expert hackers only.
47 If you don't know what to do, choose 8KB.
49 config SPARC64_PAGE_SIZE_64KB
52 config SPARC64_PAGE_SIZE_512KB
55 config SPARC64_PAGE_SIZE_4MB
61 bool "Enable seccomp to safely compute untrusted bytecode"
65 This kernel feature is useful for number crunching applications
66 that may need to compute untrusted bytecode during their
67 execution. By using pipes or other transports made available to
68 the process as file descriptors supporting the read/write
69 syscalls, it's possible to isolate those applications in
70 their own address space using seccomp. Once seccomp is
71 enabled via /proc/<pid>/seccomp, it cannot be disabled
72 and the task is only allowed to execute a few safe syscalls
73 defined by each seccomp mode.
75 If unsure, say Y. Only embedded should say N here.
77 source kernel/Kconfig.hz
83 depends on COMPAT && SYSVIPC
86 menu "General machine setup"
89 bool "Symmetric multi-processing support"
91 This enables support for systems with more than one CPU. If you have
92 a system with only one CPU, say N. If you have a system with more than
95 If you say N here, the kernel will run on single and multiprocessor
96 machines, but will use only one CPU of a multiprocessor machine. If
97 you say Y here, the kernel will run on many, but not all,
98 singleprocessor machines. On a singleprocessor machine, the kernel
99 will run faster if you say N here.
101 People using multiprocessor machines who say Y here should also say
102 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
103 Management" code will be disabled if you say Y here.
105 See also the <file:Documentation/smp.txt>,
106 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
107 <http://www.tldp.org/docs.html#howto>.
109 If you don't know what to do here, say N.
112 bool "Preemptible Kernel"
114 This option reduces the latency of the kernel when reacting to
115 real-time or interactive events by allowing a low priority process to
116 be preempted even if it is in kernel mode executing a system call.
117 This allows applications to run more reliably even when the system is
120 Say Y here if you are building a kernel for a desktop, embedded
121 or real-time system. Say N if you are unsure.
124 int "Maximum number of CPUs (2-64)"
129 source "drivers/cpufreq/Kconfig"
132 tristate "UltraSPARC-III CPU Frequency driver"
134 select CPU_FREQ_TABLE
136 This adds the CPUFreq driver for UltraSPARC-III processors.
138 For details, take a look at <file:Documentation/cpu-freq>.
143 tristate "UltraSPARC-IIe CPU Frequency driver"
145 select CPU_FREQ_TABLE
147 This adds the CPUFreq driver for UltraSPARC-IIe processors.
149 For details, take a look at <file:Documentation/cpu-freq>.
153 # Global things across all Sun machines.
154 config RWSEM_GENERIC_SPINLOCK
157 config RWSEM_XCHGADD_ALGORITHM
161 config GENERIC_CALIBRATE_DELAY
166 prompt "SPARC64 Huge TLB Page Size"
167 depends on HUGETLB_PAGE
168 default HUGETLB_PAGE_SIZE_4MB
170 config HUGETLB_PAGE_SIZE_4MB
173 config HUGETLB_PAGE_SIZE_512K
174 depends on !SPARC64_PAGE_SIZE_4MB
177 config HUGETLB_PAGE_SIZE_64K
178 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512K
187 config GENERIC_ISA_DMA
194 Find out whether you have ISA slots on your motherboard. ISA is the
195 name of a bus system, i.e. the way the CPU talks to the other stuff
196 inside your box. Other bus systems are PCI, EISA, MicroChannel
197 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
198 newer boards don't support it. If you have ISA, say Y, otherwise N.
203 Say Y here if you would like support for ISA Plug and Play devices.
204 Some information is in <file:Documentation/isapnp.txt>.
206 To compile this driver as a module, choose M here: the
207 module will be called isapnp.
214 The Extended Industry Standard Architecture (EISA) bus was
215 developed as an open alternative to the IBM MicroChannel bus.
217 The EISA bus provided some of the features of the IBM MicroChannel
218 bus while maintaining backward compatibility with cards made for
219 the older ISA bus. The EISA bus saw limited use between 1988 and
220 1995 when it was made obsolete by the PCI bus.
222 Say Y here if you are building a kernel for an EISA-based machine.
229 MicroChannel Architecture is found in some IBM PS/2 machines and
230 laptops. It is a bus system similar to PCI or ISA. See
231 <file:Documentation/mca.txt> (and especially the web page given
232 there) before attempting to build an MCA bus kernel.
237 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
238 computer. These are credit-card size devices such as network cards,
239 modems or hard drives often used with laptops computers. There are
240 actually two varieties of these cards: the older 16 bit PCMCIA cards
241 and the newer 32 bit CardBus cards. If you want to use CardBus
242 cards, you need to say Y here and also to "CardBus support" below.
244 To use your PC-cards, you will need supporting software from David
245 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
246 for location). Please also read the PCMCIA-HOWTO, available from
247 <http://www.tldp.org/docs.html#howto>.
249 To compile this driver as modules, choose M here: the
250 modules will be called pcmcia_core and ds.
271 Find out whether you have a PCI motherboard. PCI is the name of a
272 bus system, i.e. the way the CPU talks to the other stuff inside
273 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
274 VESA. If you have PCI, say Y, otherwise N.
276 The PCI-HOWTO, available from
277 <http://www.tldp.org/docs.html#howto>, contains valuable
278 information about which PCI hardware does work under Linux and which
285 source "drivers/pci/Kconfig"
287 config SUN_OPENPROMFS
288 tristate "Openprom tree appears in /proc/openprom"
290 If you say Y, the OpenPROM device tree will be available as a
291 virtual file system, which you can mount to /proc/openprom by "mount
292 -t openpromfs none /proc/openprom".
294 To compile the /proc/openprom support as a module, choose M here: the
295 module will be called openpromfs. If unsure, choose M.
297 config SPARC32_COMPAT
298 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
300 This allows you to run 32-bit binaries on your Ultra.
301 Everybody wants this; say Y.
305 depends on SPARC32_COMPAT
310 depends on SPARC32_COMPAT
314 tristate "Kernel support for 32-bit ELF binaries"
315 depends on SPARC32_COMPAT
317 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
318 Everybody wants this; say Y.
321 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
322 depends on SPARC32_COMPAT
324 This allows you to run 32-bit a.out format binaries on your Ultra.
325 If you want to run SunOS binaries (see SunOS binary emulation below)
326 or other a.out binaries, say Y. If unsure, say N.
328 menu "Executable file formats"
330 source "fs/Kconfig.binfmt"
333 bool "SunOS binary emulation"
334 depends on BINFMT_AOUT32
336 This allows you to run most SunOS binaries. If you want to do this,
337 say Y here and place appropriate files in /usr/gnemul/sunos. See
338 <http://www.ultralinux.org/faq.html> for more information. If you
339 want to run SunOS binaries on an Ultra you must also say Y to
340 "Kernel support for 32-bit a.out binaries" above.
343 tristate "Solaris binary emulation (EXPERIMENTAL)"
344 depends on SPARC32_COMPAT && EXPERIMENTAL
346 This is experimental code which will enable you to run (many)
347 Solaris binaries on your SPARC Linux machine.
349 To compile this code as a module, choose M here: the
350 module will be called solaris.
355 bool "Default bootloader kernel arguments"
358 string "Initial kernel command string"
359 depends on CMDLINE_BOOL
360 default "console=ttyS0,9600 root=/dev/sda1"
362 Say Y here if you want to be able to pass default arguments to
363 the kernel. This will be overridden by the bootloader, if you
364 use one (such as SILO). This is most useful if you want to boot
365 a kernel from TFTP, and want default options to be available
366 with having them passed on the command line.
368 NOTE: This option WILL override the PROM bootargs setting!
372 source "drivers/Kconfig"
374 source "drivers/sbus/char/Kconfig"
376 source "drivers/fc4/Kconfig"
380 menu "Instrumentation Support"
381 depends on EXPERIMENTAL
383 source "arch/sparc64/oprofile/Kconfig"
386 bool "Kprobes (EXPERIMENTAL)"
388 Kprobes allows you to trap at almost any kernel address and
389 execute a callback function. register_kprobe() establishes
390 a probepoint and specifies the callback. Kprobes is useful
391 for kernel debugging, non-intrusive instrumentation and testing.
392 If in doubt, say "N".
395 source "arch/sparc64/Kconfig.debug"
397 source "security/Kconfig"
399 source "crypto/Kconfig"