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/>.
29 config TIME_INTERPOLATION
33 config ARCH_MAY_HAVE_PC_FDC
42 prompt "Kernel page size"
43 default SPARC64_PAGE_SIZE_8KB
45 config SPARC64_PAGE_SIZE_8KB
48 This lets you select the page size of the kernel.
50 8KB and 64KB work quite well, since Sparc ELF sections
51 provide for up to 64KB alignment.
53 Therefore, 512KB and 4MB are for expert hackers only.
55 If you don't know what to do, choose 8KB.
57 config SPARC64_PAGE_SIZE_64KB
60 config SPARC64_PAGE_SIZE_512KB
63 config SPARC64_PAGE_SIZE_4MB
69 bool "Enable seccomp to safely compute untrusted bytecode"
73 This kernel feature is useful for number crunching applications
74 that may need to compute untrusted bytecode during their
75 execution. By using pipes or other transports made available to
76 the process as file descriptors supporting the read/write
77 syscalls, it's possible to isolate those applications in
78 their own address space using seccomp. Once seccomp is
79 enabled via /proc/<pid>/seccomp, it cannot be disabled
80 and the task is only allowed to execute a few safe syscalls
81 defined by each seccomp mode.
83 If unsure, say Y. Only embedded should say N here.
85 source kernel/Kconfig.hz
91 depends on COMPAT && SYSVIPC
94 config GENERIC_HARDIRQS
98 menu "General machine setup"
101 bool "Symmetric multi-processing support"
103 This enables support for systems with more than one CPU. If you have
104 a system with only one CPU, say N. If you have a system with more than
107 If you say N here, the kernel will run on single and multiprocessor
108 machines, but will use only one CPU of a multiprocessor machine. If
109 you say Y here, the kernel will run on many, but not all,
110 singleprocessor machines. On a singleprocessor machine, the kernel
111 will run faster if you say N here.
113 People using multiprocessor machines who say Y here should also say
114 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
115 Management" code will be disabled if you say Y here.
117 See also the <file:Documentation/smp.txt>,
118 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
119 <http://www.tldp.org/docs.html#howto>.
121 If you don't know what to do here, say N.
124 bool "Preemptible Kernel"
126 This option reduces the latency of the kernel when reacting to
127 real-time or interactive events by allowing a low priority process to
128 be preempted even if it is in kernel mode executing a system call.
129 This allows applications to run more reliably even when the system is
132 Say Y here if you are building a kernel for a desktop, embedded
133 or real-time system. Say N if you are unsure.
136 int "Maximum number of CPUs (2-64)"
141 source "drivers/cpufreq/Kconfig"
144 tristate "UltraSPARC-III CPU Frequency driver"
146 select CPU_FREQ_TABLE
148 This adds the CPUFreq driver for UltraSPARC-III processors.
150 For details, take a look at <file:Documentation/cpu-freq>.
155 tristate "UltraSPARC-IIe CPU Frequency driver"
157 select CPU_FREQ_TABLE
159 This adds the CPUFreq driver for UltraSPARC-IIe processors.
161 For details, take a look at <file:Documentation/cpu-freq>.
165 # Global things across all Sun machines.
166 config RWSEM_GENERIC_SPINLOCK
169 config RWSEM_XCHGADD_ALGORITHM
173 config GENERIC_FIND_NEXT_BIT
177 config GENERIC_HWEIGHT
179 default y if !ULTRA_HAS_POPULATION_COUNT
181 config GENERIC_CALIBRATE_DELAY
186 prompt "SPARC64 Huge TLB Page Size"
187 depends on HUGETLB_PAGE
188 default HUGETLB_PAGE_SIZE_4MB
190 config HUGETLB_PAGE_SIZE_4MB
193 config HUGETLB_PAGE_SIZE_512K
194 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
197 config HUGETLB_PAGE_SIZE_64K
198 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
205 config ARCH_SELECT_MEMORY_MODEL
208 config ARCH_SPARSEMEM_ENABLE
211 config ARCH_SPARSEMEM_DEFAULT
219 config GENERIC_ISA_DMA
226 Find out whether you have ISA slots on your motherboard. ISA is the
227 name of a bus system, i.e. the way the CPU talks to the other stuff
228 inside your box. Other bus systems are PCI, EISA, MicroChannel
229 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
230 newer boards don't support it. If you have ISA, say Y, otherwise N.
235 Say Y here if you would like support for ISA Plug and Play devices.
236 Some information is in <file:Documentation/isapnp.txt>.
238 To compile this driver as a module, choose M here: the
239 module will be called isapnp.
246 The Extended Industry Standard Architecture (EISA) bus was
247 developed as an open alternative to the IBM MicroChannel bus.
249 The EISA bus provided some of the features of the IBM MicroChannel
250 bus while maintaining backward compatibility with cards made for
251 the older ISA bus. The EISA bus saw limited use between 1988 and
252 1995 when it was made obsolete by the PCI bus.
254 Say Y here if you are building a kernel for an EISA-based machine.
261 MicroChannel Architecture is found in some IBM PS/2 machines and
262 laptops. It is a bus system similar to PCI or ISA. See
263 <file:Documentation/mca.txt> (and especially the web page given
264 there) before attempting to build an MCA bus kernel.
269 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
270 computer. These are credit-card size devices such as network cards,
271 modems or hard drives often used with laptops computers. There are
272 actually two varieties of these cards: the older 16 bit PCMCIA cards
273 and the newer 32 bit CardBus cards. If you want to use CardBus
274 cards, you need to say Y here and also to "CardBus support" below.
276 To use your PC-cards, you will need supporting software from David
277 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
278 for location). Please also read the PCMCIA-HOWTO, available from
279 <http://www.tldp.org/docs.html#howto>.
281 To compile this driver as modules, choose M here: the
282 modules will be called pcmcia_core and ds.
303 Find out whether you have a PCI motherboard. PCI is the name of a
304 bus system, i.e. the way the CPU talks to the other stuff inside
305 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
306 VESA. If you have PCI, say Y, otherwise N.
308 The PCI-HOWTO, available from
309 <http://www.tldp.org/docs.html#howto>, contains valuable
310 information about which PCI hardware does work under Linux and which
317 source "drivers/pci/Kconfig"
319 config SUN_OPENPROMFS
320 tristate "Openprom tree appears in /proc/openprom"
322 If you say Y, the OpenPROM device tree will be available as a
323 virtual file system, which you can mount to /proc/openprom by "mount
324 -t openpromfs none /proc/openprom".
326 To compile the /proc/openprom support as a module, choose M here: the
327 module will be called openpromfs. If unsure, choose M.
329 config SPARC32_COMPAT
330 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
332 This allows you to run 32-bit binaries on your Ultra.
333 Everybody wants this; say Y.
337 depends on SPARC32_COMPAT
341 bool "Kernel support for 32-bit ELF binaries"
342 depends on SPARC32_COMPAT
344 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
345 Everybody wants this; say Y.
348 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
349 depends on SPARC32_COMPAT
351 This allows you to run 32-bit a.out format binaries on your Ultra.
352 If you want to run SunOS binaries (see SunOS binary emulation below)
353 or other a.out binaries, say Y. If unsure, say N.
355 menu "Executable file formats"
357 source "fs/Kconfig.binfmt"
360 bool "SunOS binary emulation"
361 depends on BINFMT_AOUT32
363 This allows you to run most SunOS binaries. If you want to do this,
364 say Y here and place appropriate files in /usr/gnemul/sunos. See
365 <http://www.ultralinux.org/faq.html> for more information. If you
366 want to run SunOS binaries on an Ultra you must also say Y to
367 "Kernel support for 32-bit a.out binaries" above.
370 tristate "Solaris binary emulation (EXPERIMENTAL)"
371 depends on SPARC32_COMPAT && EXPERIMENTAL
373 This is experimental code which will enable you to run (many)
374 Solaris binaries on your SPARC Linux machine.
376 To compile this code as a module, choose M here: the
377 module will be called solaris.
382 bool "SMT (Hyperthreading) scheduler support"
386 SMT scheduler support improves the CPU scheduler's decision making
387 when dealing with UltraSPARC cpus at a cost of slightly increased
388 overhead in some places. If unsure say N here.
391 bool "Default bootloader kernel arguments"
394 string "Initial kernel command string"
395 depends on CMDLINE_BOOL
396 default "console=ttyS0,9600 root=/dev/sda1"
398 Say Y here if you want to be able to pass default arguments to
399 the kernel. This will be overridden by the bootloader, if you
400 use one (such as SILO). This is most useful if you want to boot
401 a kernel from TFTP, and want default options to be available
402 with having them passed on the command line.
404 NOTE: This option WILL override the PROM bootargs setting!
408 source "drivers/Kconfig"
410 source "drivers/sbus/char/Kconfig"
412 source "drivers/fc4/Kconfig"
416 menu "Instrumentation Support"
417 depends on EXPERIMENTAL
419 source "arch/sparc64/oprofile/Kconfig"
422 bool "Kprobes (EXPERIMENTAL)"
423 depends on EXPERIMENTAL && MODULES
425 Kprobes allows you to trap at almost any kernel address and
426 execute a callback function. register_kprobe() establishes
427 a probepoint and specifies the callback. Kprobes is useful
428 for kernel debugging, non-intrusive instrumentation and testing.
429 If in doubt, say "N".
432 source "arch/sparc64/Kconfig.debug"
434 source "security/Kconfig"
436 source "crypto/Kconfig"