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
38 prompt "Kernel page size"
39 default SPARC64_PAGE_SIZE_8KB
41 config SPARC64_PAGE_SIZE_8KB
44 This lets you select the page size of the kernel.
46 8KB and 64KB work quite well, since Sparc ELF sections
47 provide for up to 64KB alignment.
49 Therefore, 512KB and 4MB are for expert hackers only.
51 If you don't know what to do, choose 8KB.
53 config SPARC64_PAGE_SIZE_64KB
56 config SPARC64_PAGE_SIZE_512KB
59 config SPARC64_PAGE_SIZE_4MB
65 bool "Enable seccomp to safely compute untrusted bytecode"
69 This kernel feature is useful for number crunching applications
70 that may need to compute untrusted bytecode during their
71 execution. By using pipes or other transports made available to
72 the process as file descriptors supporting the read/write
73 syscalls, it's possible to isolate those applications in
74 their own address space using seccomp. Once seccomp is
75 enabled via /proc/<pid>/seccomp, it cannot be disabled
76 and the task is only allowed to execute a few safe syscalls
77 defined by each seccomp mode.
79 If unsure, say Y. Only embedded should say N here.
81 source kernel/Kconfig.hz
87 depends on COMPAT && SYSVIPC
90 menu "General machine setup"
93 bool "Symmetric multi-processing support"
95 This enables support for systems with more than one CPU. If you have
96 a system with only one CPU, say N. If you have a system with more than
99 If you say N here, the kernel will run on single and multiprocessor
100 machines, but will use only one CPU of a multiprocessor machine. If
101 you say Y here, the kernel will run on many, but not all,
102 singleprocessor machines. On a singleprocessor machine, the kernel
103 will run faster if you say N here.
105 People using multiprocessor machines who say Y here should also say
106 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
107 Management" code will be disabled if you say Y here.
109 See also the <file:Documentation/smp.txt>,
110 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
111 <http://www.tldp.org/docs.html#howto>.
113 If you don't know what to do here, say N.
116 bool "Preemptible Kernel"
118 This option reduces the latency of the kernel when reacting to
119 real-time or interactive events by allowing a low priority process to
120 be preempted even if it is in kernel mode executing a system call.
121 This allows applications to run more reliably even when the system is
124 Say Y here if you are building a kernel for a desktop, embedded
125 or real-time system. Say N if you are unsure.
128 int "Maximum number of CPUs (2-64)"
133 source "drivers/cpufreq/Kconfig"
136 tristate "UltraSPARC-III CPU Frequency driver"
138 select CPU_FREQ_TABLE
140 This adds the CPUFreq driver for UltraSPARC-III processors.
142 For details, take a look at <file:Documentation/cpu-freq>.
147 tristate "UltraSPARC-IIe CPU Frequency driver"
149 select CPU_FREQ_TABLE
151 This adds the CPUFreq driver for UltraSPARC-IIe processors.
153 For details, take a look at <file:Documentation/cpu-freq>.
157 # Global things across all Sun machines.
158 config RWSEM_GENERIC_SPINLOCK
161 config RWSEM_XCHGADD_ALGORITHM
165 config GENERIC_FIND_NEXT_BIT
169 config GENERIC_HWEIGHT
171 default y if !ULTRA_HAS_POPULATION_COUNT
173 config GENERIC_CALIBRATE_DELAY
178 prompt "SPARC64 Huge TLB Page Size"
179 depends on HUGETLB_PAGE
180 default HUGETLB_PAGE_SIZE_4MB
182 config HUGETLB_PAGE_SIZE_4MB
185 config HUGETLB_PAGE_SIZE_512K
186 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
189 config HUGETLB_PAGE_SIZE_64K
190 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64K
197 config ARCH_SPARSEMEM_ENABLE
200 config ARCH_SPARSEMEM_DEFAULT
208 config GENERIC_ISA_DMA
215 Find out whether you have ISA slots on your motherboard. ISA is the
216 name of a bus system, i.e. the way the CPU talks to the other stuff
217 inside your box. Other bus systems are PCI, EISA, MicroChannel
218 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
219 newer boards don't support it. If you have ISA, say Y, otherwise N.
224 Say Y here if you would like support for ISA Plug and Play devices.
225 Some information is in <file:Documentation/isapnp.txt>.
227 To compile this driver as a module, choose M here: the
228 module will be called isapnp.
235 The Extended Industry Standard Architecture (EISA) bus was
236 developed as an open alternative to the IBM MicroChannel bus.
238 The EISA bus provided some of the features of the IBM MicroChannel
239 bus while maintaining backward compatibility with cards made for
240 the older ISA bus. The EISA bus saw limited use between 1988 and
241 1995 when it was made obsolete by the PCI bus.
243 Say Y here if you are building a kernel for an EISA-based machine.
250 MicroChannel Architecture is found in some IBM PS/2 machines and
251 laptops. It is a bus system similar to PCI or ISA. See
252 <file:Documentation/mca.txt> (and especially the web page given
253 there) before attempting to build an MCA bus kernel.
258 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
259 computer. These are credit-card size devices such as network cards,
260 modems or hard drives often used with laptops computers. There are
261 actually two varieties of these cards: the older 16 bit PCMCIA cards
262 and the newer 32 bit CardBus cards. If you want to use CardBus
263 cards, you need to say Y here and also to "CardBus support" below.
265 To use your PC-cards, you will need supporting software from David
266 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
267 for location). Please also read the PCMCIA-HOWTO, available from
268 <http://www.tldp.org/docs.html#howto>.
270 To compile this driver as modules, choose M here: the
271 modules will be called pcmcia_core and ds.
292 Find out whether you have a PCI motherboard. PCI is the name of a
293 bus system, i.e. the way the CPU talks to the other stuff inside
294 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
295 VESA. If you have PCI, say Y, otherwise N.
297 The PCI-HOWTO, available from
298 <http://www.tldp.org/docs.html#howto>, contains valuable
299 information about which PCI hardware does work under Linux and which
306 source "drivers/pci/Kconfig"
308 config SUN_OPENPROMFS
309 tristate "Openprom tree appears in /proc/openprom"
311 If you say Y, the OpenPROM device tree will be available as a
312 virtual file system, which you can mount to /proc/openprom by "mount
313 -t openpromfs none /proc/openprom".
315 To compile the /proc/openprom support as a module, choose M here: the
316 module will be called openpromfs. If unsure, choose M.
318 config SPARC32_COMPAT
319 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
321 This allows you to run 32-bit binaries on your Ultra.
322 Everybody wants this; say Y.
326 depends on SPARC32_COMPAT
330 tristate "Kernel support for 32-bit ELF binaries"
331 depends on SPARC32_COMPAT
333 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
334 Everybody wants this; say Y.
337 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
338 depends on SPARC32_COMPAT
340 This allows you to run 32-bit a.out format binaries on your Ultra.
341 If you want to run SunOS binaries (see SunOS binary emulation below)
342 or other a.out binaries, say Y. If unsure, say N.
344 menu "Executable file formats"
346 source "fs/Kconfig.binfmt"
349 bool "SunOS binary emulation"
350 depends on BINFMT_AOUT32
352 This allows you to run most SunOS binaries. If you want to do this,
353 say Y here and place appropriate files in /usr/gnemul/sunos. See
354 <http://www.ultralinux.org/faq.html> for more information. If you
355 want to run SunOS binaries on an Ultra you must also say Y to
356 "Kernel support for 32-bit a.out binaries" above.
359 tristate "Solaris binary emulation (EXPERIMENTAL)"
360 depends on SPARC32_COMPAT && EXPERIMENTAL
362 This is experimental code which will enable you to run (many)
363 Solaris binaries on your SPARC Linux machine.
365 To compile this code as a module, choose M here: the
366 module will be called solaris.
371 bool "SMT (Hyperthreading) scheduler support"
375 SMT scheduler support improves the CPU scheduler's decision making
376 when dealing with UltraSPARC cpus at a cost of slightly increased
377 overhead in some places. If unsure say N here.
380 bool "Default bootloader kernel arguments"
383 string "Initial kernel command string"
384 depends on CMDLINE_BOOL
385 default "console=ttyS0,9600 root=/dev/sda1"
387 Say Y here if you want to be able to pass default arguments to
388 the kernel. This will be overridden by the bootloader, if you
389 use one (such as SILO). This is most useful if you want to boot
390 a kernel from TFTP, and want default options to be available
391 with having them passed on the command line.
393 NOTE: This option WILL override the PROM bootargs setting!
397 source "drivers/Kconfig"
399 source "drivers/sbus/char/Kconfig"
401 source "drivers/fc4/Kconfig"
405 menu "Instrumentation Support"
406 depends on EXPERIMENTAL
408 source "arch/sparc64/oprofile/Kconfig"
411 bool "Kprobes (EXPERIMENTAL)"
412 depends on EXPERIMENTAL && MODULES
414 Kprobes allows you to trap at almost any kernel address and
415 execute a callback function. register_kprobe() establishes
416 a probepoint and specifies the callback. Kprobes is useful
417 for kernel debugging, non-intrusive instrumentation and testing.
418 If in doubt, say "N".
421 source "arch/sparc64/Kconfig.debug"
423 source "security/Kconfig"
425 source "crypto/Kconfig"