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 config GENERIC_HARDIRQS
94 menu "General machine setup"
97 bool "Symmetric multi-processing support"
99 This enables support for systems with more than one CPU. If you have
100 a system with only one CPU, say N. If you have a system with more than
103 If you say N here, the kernel will run on single and multiprocessor
104 machines, but will use only one CPU of a multiprocessor machine. If
105 you say Y here, the kernel will run on many, but not all,
106 singleprocessor machines. On a singleprocessor machine, the kernel
107 will run faster if you say N here.
109 People using multiprocessor machines who say Y here should also say
110 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
111 Management" code will be disabled if you say Y here.
113 See also the <file:Documentation/smp.txt>,
114 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
115 <http://www.tldp.org/docs.html#howto>.
117 If you don't know what to do here, say N.
120 bool "Preemptible Kernel"
122 This option reduces the latency of the kernel when reacting to
123 real-time or interactive events by allowing a low priority process to
124 be preempted even if it is in kernel mode executing a system call.
125 This allows applications to run more reliably even when the system is
128 Say Y here if you are building a kernel for a desktop, embedded
129 or real-time system. Say N if you are unsure.
132 int "Maximum number of CPUs (2-64)"
137 source "drivers/cpufreq/Kconfig"
140 tristate "UltraSPARC-III CPU Frequency driver"
142 select CPU_FREQ_TABLE
144 This adds the CPUFreq driver for UltraSPARC-III processors.
146 For details, take a look at <file:Documentation/cpu-freq>.
151 tristate "UltraSPARC-IIe CPU Frequency driver"
153 select CPU_FREQ_TABLE
155 This adds the CPUFreq driver for UltraSPARC-IIe processors.
157 For details, take a look at <file:Documentation/cpu-freq>.
161 # Global things across all Sun machines.
162 config RWSEM_GENERIC_SPINLOCK
165 config RWSEM_XCHGADD_ALGORITHM
169 config GENERIC_FIND_NEXT_BIT
173 config GENERIC_HWEIGHT
175 default y if !ULTRA_HAS_POPULATION_COUNT
177 config GENERIC_CALIBRATE_DELAY
182 prompt "SPARC64 Huge TLB Page Size"
183 depends on HUGETLB_PAGE
184 default HUGETLB_PAGE_SIZE_4MB
186 config HUGETLB_PAGE_SIZE_4MB
189 config HUGETLB_PAGE_SIZE_512K
190 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
193 config HUGETLB_PAGE_SIZE_64K
194 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
201 config ARCH_SELECT_MEMORY_MODEL
204 config ARCH_SPARSEMEM_ENABLE
207 config ARCH_SPARSEMEM_DEFAULT
215 config GENERIC_ISA_DMA
222 Find out whether you have ISA slots on your motherboard. ISA is the
223 name of a bus system, i.e. the way the CPU talks to the other stuff
224 inside your box. Other bus systems are PCI, EISA, MicroChannel
225 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
226 newer boards don't support it. If you have ISA, say Y, otherwise N.
231 Say Y here if you would like support for ISA Plug and Play devices.
232 Some information is in <file:Documentation/isapnp.txt>.
234 To compile this driver as a module, choose M here: the
235 module will be called isapnp.
242 The Extended Industry Standard Architecture (EISA) bus was
243 developed as an open alternative to the IBM MicroChannel bus.
245 The EISA bus provided some of the features of the IBM MicroChannel
246 bus while maintaining backward compatibility with cards made for
247 the older ISA bus. The EISA bus saw limited use between 1988 and
248 1995 when it was made obsolete by the PCI bus.
250 Say Y here if you are building a kernel for an EISA-based machine.
257 MicroChannel Architecture is found in some IBM PS/2 machines and
258 laptops. It is a bus system similar to PCI or ISA. See
259 <file:Documentation/mca.txt> (and especially the web page given
260 there) before attempting to build an MCA bus kernel.
265 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
266 computer. These are credit-card size devices such as network cards,
267 modems or hard drives often used with laptops computers. There are
268 actually two varieties of these cards: the older 16 bit PCMCIA cards
269 and the newer 32 bit CardBus cards. If you want to use CardBus
270 cards, you need to say Y here and also to "CardBus support" below.
272 To use your PC-cards, you will need supporting software from David
273 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
274 for location). Please also read the PCMCIA-HOWTO, available from
275 <http://www.tldp.org/docs.html#howto>.
277 To compile this driver as modules, choose M here: the
278 modules will be called pcmcia_core and ds.
299 Find out whether you have a PCI motherboard. PCI is the name of a
300 bus system, i.e. the way the CPU talks to the other stuff inside
301 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
302 VESA. If you have PCI, say Y, otherwise N.
304 The PCI-HOWTO, available from
305 <http://www.tldp.org/docs.html#howto>, contains valuable
306 information about which PCI hardware does work under Linux and which
313 source "drivers/pci/Kconfig"
315 config SUN_OPENPROMFS
316 tristate "Openprom tree appears in /proc/openprom"
318 If you say Y, the OpenPROM device tree will be available as a
319 virtual file system, which you can mount to /proc/openprom by "mount
320 -t openpromfs none /proc/openprom".
322 To compile the /proc/openprom support as a module, choose M here: the
323 module will be called openpromfs. If unsure, choose M.
325 config SPARC32_COMPAT
326 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
328 This allows you to run 32-bit binaries on your Ultra.
329 Everybody wants this; say Y.
333 depends on SPARC32_COMPAT
337 bool "Kernel support for 32-bit ELF binaries"
338 depends on SPARC32_COMPAT
340 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
341 Everybody wants this; say Y.
344 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
345 depends on SPARC32_COMPAT
347 This allows you to run 32-bit a.out format binaries on your Ultra.
348 If you want to run SunOS binaries (see SunOS binary emulation below)
349 or other a.out binaries, say Y. If unsure, say N.
351 menu "Executable file formats"
353 source "fs/Kconfig.binfmt"
356 bool "SunOS binary emulation"
357 depends on BINFMT_AOUT32
359 This allows you to run most SunOS binaries. If you want to do this,
360 say Y here and place appropriate files in /usr/gnemul/sunos. See
361 <http://www.ultralinux.org/faq.html> for more information. If you
362 want to run SunOS binaries on an Ultra you must also say Y to
363 "Kernel support for 32-bit a.out binaries" above.
366 tristate "Solaris binary emulation (EXPERIMENTAL)"
367 depends on SPARC32_COMPAT && EXPERIMENTAL
369 This is experimental code which will enable you to run (many)
370 Solaris binaries on your SPARC Linux machine.
372 To compile this code as a module, choose M here: the
373 module will be called solaris.
378 bool "SMT (Hyperthreading) scheduler support"
382 SMT scheduler support improves the CPU scheduler's decision making
383 when dealing with UltraSPARC cpus at a cost of slightly increased
384 overhead in some places. If unsure say N here.
387 bool "Default bootloader kernel arguments"
390 string "Initial kernel command string"
391 depends on CMDLINE_BOOL
392 default "console=ttyS0,9600 root=/dev/sda1"
394 Say Y here if you want to be able to pass default arguments to
395 the kernel. This will be overridden by the bootloader, if you
396 use one (such as SILO). This is most useful if you want to boot
397 a kernel from TFTP, and want default options to be available
398 with having them passed on the command line.
400 NOTE: This option WILL override the PROM bootargs setting!
404 source "drivers/Kconfig"
406 source "drivers/sbus/char/Kconfig"
408 source "drivers/fc4/Kconfig"
412 menu "Instrumentation Support"
413 depends on EXPERIMENTAL
415 source "arch/sparc64/oprofile/Kconfig"
418 bool "Kprobes (EXPERIMENTAL)"
419 depends on EXPERIMENTAL && MODULES
421 Kprobes allows you to trap at almost any kernel address and
422 execute a callback function. register_kprobe() establishes
423 a probepoint and specifies the callback. Kprobes is useful
424 for kernel debugging, non-intrusive instrumentation and testing.
425 If in doubt, say "N".
428 source "arch/sparc64/Kconfig.debug"
430 source "security/Kconfig"
432 source "crypto/Kconfig"