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
37 config ARCH_HAS_ILOG2_U32
41 config ARCH_HAS_ILOG2_U64
50 prompt "Kernel page size"
51 default SPARC64_PAGE_SIZE_8KB
53 config SPARC64_PAGE_SIZE_8KB
56 This lets you select the page size of the kernel.
58 8KB and 64KB work quite well, since Sparc ELF sections
59 provide for up to 64KB alignment.
61 Therefore, 512KB and 4MB are for expert hackers only.
63 If you don't know what to do, choose 8KB.
65 config SPARC64_PAGE_SIZE_64KB
68 config SPARC64_PAGE_SIZE_512KB
71 config SPARC64_PAGE_SIZE_4MB
77 bool "Enable seccomp to safely compute untrusted bytecode"
81 This kernel feature is useful for number crunching applications
82 that may need to compute untrusted bytecode during their
83 execution. By using pipes or other transports made available to
84 the process as file descriptors supporting the read/write
85 syscalls, it's possible to isolate those applications in
86 their own address space using seccomp. Once seccomp is
87 enabled via /proc/<pid>/seccomp, it cannot be disabled
88 and the task is only allowed to execute a few safe syscalls
89 defined by each seccomp mode.
91 If unsure, say Y. Only embedded should say N here.
93 source kernel/Kconfig.hz
99 depends on COMPAT && SYSVIPC
102 config GENERIC_HARDIRQS
106 menu "General machine setup"
109 bool "Symmetric multi-processing support"
111 This enables support for systems with more than one CPU. If you have
112 a system with only one CPU, say N. If you have a system with more than
115 If you say N here, the kernel will run on single and multiprocessor
116 machines, but will use only one CPU of a multiprocessor machine. If
117 you say Y here, the kernel will run on many, but not all,
118 singleprocessor machines. On a singleprocessor machine, the kernel
119 will run faster if you say N here.
121 People using multiprocessor machines who say Y here should also say
122 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
123 Management" code will be disabled if you say Y here.
125 See also the <file:Documentation/smp.txt>,
126 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
127 <http://www.tldp.org/docs.html#howto>.
129 If you don't know what to do here, say N.
132 bool "Preemptible Kernel"
134 This option reduces the latency of the kernel when reacting to
135 real-time or interactive events by allowing a low priority process to
136 be preempted even if it is in kernel mode executing a system call.
137 This allows applications to run more reliably even when the system is
140 Say Y here if you are building a kernel for a desktop, embedded
141 or real-time system. Say N if you are unsure.
144 int "Maximum number of CPUs (2-64)"
149 source "drivers/cpufreq/Kconfig"
152 tristate "UltraSPARC-III CPU Frequency driver"
154 select CPU_FREQ_TABLE
156 This adds the CPUFreq driver for UltraSPARC-III processors.
158 For details, take a look at <file:Documentation/cpu-freq>.
163 tristate "UltraSPARC-IIe CPU Frequency driver"
165 select CPU_FREQ_TABLE
167 This adds the CPUFreq driver for UltraSPARC-IIe processors.
169 For details, take a look at <file:Documentation/cpu-freq>.
173 # Global things across all Sun machines.
174 config RWSEM_GENERIC_SPINLOCK
177 config RWSEM_XCHGADD_ALGORITHM
181 config GENERIC_FIND_NEXT_BIT
185 config GENERIC_HWEIGHT
187 default y if !ULTRA_HAS_POPULATION_COUNT
189 config GENERIC_CALIBRATE_DELAY
194 prompt "SPARC64 Huge TLB Page Size"
195 depends on HUGETLB_PAGE
196 default HUGETLB_PAGE_SIZE_4MB
198 config HUGETLB_PAGE_SIZE_4MB
201 config HUGETLB_PAGE_SIZE_512K
202 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
205 config HUGETLB_PAGE_SIZE_64K
206 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
213 config ARCH_SELECT_MEMORY_MODEL
216 config ARCH_SPARSEMEM_ENABLE
219 config ARCH_SPARSEMEM_DEFAULT
227 config GENERIC_ISA_DMA
234 Find out whether you have ISA slots on your motherboard. ISA is the
235 name of a bus system, i.e. the way the CPU talks to the other stuff
236 inside your box. Other bus systems are PCI, EISA, MicroChannel
237 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
238 newer boards don't support it. If you have ISA, say Y, otherwise N.
243 Say Y here if you would like support for ISA Plug and Play devices.
244 Some information is in <file:Documentation/isapnp.txt>.
246 To compile this driver as a module, choose M here: the
247 module will be called isapnp.
254 The Extended Industry Standard Architecture (EISA) bus was
255 developed as an open alternative to the IBM MicroChannel bus.
257 The EISA bus provided some of the features of the IBM MicroChannel
258 bus while maintaining backward compatibility with cards made for
259 the older ISA bus. The EISA bus saw limited use between 1988 and
260 1995 when it was made obsolete by the PCI bus.
262 Say Y here if you are building a kernel for an EISA-based machine.
269 MicroChannel Architecture is found in some IBM PS/2 machines and
270 laptops. It is a bus system similar to PCI or ISA. See
271 <file:Documentation/mca.txt> (and especially the web page given
272 there) before attempting to build an MCA bus kernel.
277 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
278 computer. These are credit-card size devices such as network cards,
279 modems or hard drives often used with laptops computers. There are
280 actually two varieties of these cards: the older 16 bit PCMCIA cards
281 and the newer 32 bit CardBus cards. If you want to use CardBus
282 cards, you need to say Y here and also to "CardBus support" below.
284 To use your PC-cards, you will need supporting software from David
285 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
286 for location). Please also read the PCMCIA-HOWTO, available from
287 <http://www.tldp.org/docs.html#howto>.
289 To compile this driver as modules, choose M here: the
290 modules will be called pcmcia_core and ds.
311 Find out whether you have a PCI motherboard. PCI is the name of a
312 bus system, i.e. the way the CPU talks to the other stuff inside
313 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
314 VESA. If you have PCI, say Y, otherwise N.
316 The PCI-HOWTO, available from
317 <http://www.tldp.org/docs.html#howto>, contains valuable
318 information about which PCI hardware does work under Linux and which
325 source "drivers/pci/Kconfig"
327 config SUN_OPENPROMFS
328 tristate "Openprom tree appears in /proc/openprom"
330 If you say Y, the OpenPROM device tree will be available as a
331 virtual file system, which you can mount to /proc/openprom by "mount
332 -t openpromfs none /proc/openprom".
334 To compile the /proc/openprom support as a module, choose M here: the
335 module will be called openpromfs. If unsure, choose M.
337 config SPARC32_COMPAT
338 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
340 This allows you to run 32-bit binaries on your Ultra.
341 Everybody wants this; say Y.
345 depends on SPARC32_COMPAT
349 bool "Kernel support for 32-bit ELF binaries"
350 depends on SPARC32_COMPAT
352 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
353 Everybody wants this; say Y.
356 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
357 depends on SPARC32_COMPAT
359 This allows you to run 32-bit a.out format binaries on your Ultra.
360 If you want to run SunOS binaries (see SunOS binary emulation below)
361 or other a.out binaries, say Y. If unsure, say N.
363 menu "Executable file formats"
365 source "fs/Kconfig.binfmt"
368 bool "SunOS binary emulation"
369 depends on BINFMT_AOUT32
371 This allows you to run most SunOS binaries. If you want to do this,
372 say Y here and place appropriate files in /usr/gnemul/sunos. See
373 <http://www.ultralinux.org/faq.html> for more information. If you
374 want to run SunOS binaries on an Ultra you must also say Y to
375 "Kernel support for 32-bit a.out binaries" above.
378 tristate "Solaris binary emulation (EXPERIMENTAL)"
379 depends on SPARC32_COMPAT && EXPERIMENTAL
381 This is experimental code which will enable you to run (many)
382 Solaris binaries on your SPARC Linux machine.
384 To compile this code as a module, choose M here: the
385 module will be called solaris.
390 bool "SMT (Hyperthreading) scheduler support"
394 SMT scheduler support improves the CPU scheduler's decision making
395 when dealing with UltraSPARC cpus at a cost of slightly increased
396 overhead in some places. If unsure say N here.
399 bool "Default bootloader kernel arguments"
402 string "Initial kernel command string"
403 depends on CMDLINE_BOOL
404 default "console=ttyS0,9600 root=/dev/sda1"
406 Say Y here if you want to be able to pass default arguments to
407 the kernel. This will be overridden by the bootloader, if you
408 use one (such as SILO). This is most useful if you want to boot
409 a kernel from TFTP, and want default options to be available
410 with having them passed on the command line.
412 NOTE: This option WILL override the PROM bootargs setting!
416 source "drivers/Kconfig"
418 source "drivers/sbus/char/Kconfig"
420 source "drivers/fc4/Kconfig"
424 menu "Instrumentation Support"
425 depends on EXPERIMENTAL
427 source "arch/sparc64/oprofile/Kconfig"
430 bool "Kprobes (EXPERIMENTAL)"
431 depends on KALLSYMS && EXPERIMENTAL && MODULES
433 Kprobes allows you to trap at almost any kernel address and
434 execute a callback function. register_kprobe() establishes
435 a probepoint and specifies the callback. Kprobes is useful
436 for kernel debugging, non-intrusive instrumentation and testing.
437 If in doubt, say "N".
440 source "arch/sparc64/Kconfig.debug"
442 source "security/Kconfig"
444 source "crypto/Kconfig"