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 STACKTRACE_SUPPORT
33 config LOCKDEP_SUPPORT
37 config TIME_INTERPOLATION
41 config ARCH_MAY_HAVE_PC_FDC
45 config ARCH_HAS_ILOG2_U32
49 config ARCH_HAS_ILOG2_U64
58 prompt "Kernel page size"
59 default SPARC64_PAGE_SIZE_8KB
61 config SPARC64_PAGE_SIZE_8KB
64 This lets you select the page size of the kernel.
66 8KB and 64KB work quite well, since Sparc ELF sections
67 provide for up to 64KB alignment.
69 Therefore, 512KB and 4MB are for expert hackers only.
71 If you don't know what to do, choose 8KB.
73 config SPARC64_PAGE_SIZE_64KB
76 config SPARC64_PAGE_SIZE_512KB
79 config SPARC64_PAGE_SIZE_4MB
85 bool "Enable seccomp to safely compute untrusted bytecode"
89 This kernel feature is useful for number crunching applications
90 that may need to compute untrusted bytecode during their
91 execution. By using pipes or other transports made available to
92 the process as file descriptors supporting the read/write
93 syscalls, it's possible to isolate those applications in
94 their own address space using seccomp. Once seccomp is
95 enabled via /proc/<pid>/seccomp, it cannot be disabled
96 and the task is only allowed to execute a few safe syscalls
97 defined by each seccomp mode.
99 If unsure, say Y. Only embedded should say N here.
101 source kernel/Kconfig.hz
103 source "init/Kconfig"
105 config SYSVIPC_COMPAT
107 depends on COMPAT && SYSVIPC
110 config GENERIC_HARDIRQS
114 menu "General machine setup"
117 bool "Symmetric multi-processing support"
119 This enables support for systems with more than one CPU. If you have
120 a system with only one CPU, say N. If you have a system with more than
123 If you say N here, the kernel will run on single and multiprocessor
124 machines, but will use only one CPU of a multiprocessor machine. If
125 you say Y here, the kernel will run on many, but not all,
126 singleprocessor machines. On a singleprocessor machine, the kernel
127 will run faster if you say N here.
129 People using multiprocessor machines who say Y here should also say
130 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
131 Management" code will be disabled if you say Y here.
133 See also the <file:Documentation/smp.txt>,
134 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
135 <http://www.tldp.org/docs.html#howto>.
137 If you don't know what to do here, say N.
140 bool "Preemptible Kernel"
142 This option reduces the latency of the kernel when reacting to
143 real-time or interactive events by allowing a low priority process to
144 be preempted even if it is in kernel mode executing a system call.
145 This allows applications to run more reliably even when the system is
148 Say Y here if you are building a kernel for a desktop, embedded
149 or real-time system. Say N if you are unsure.
152 int "Maximum number of CPUs (2-64)"
157 source "drivers/cpufreq/Kconfig"
160 tristate "UltraSPARC-III CPU Frequency driver"
162 select CPU_FREQ_TABLE
164 This adds the CPUFreq driver for UltraSPARC-III processors.
166 For details, take a look at <file:Documentation/cpu-freq>.
171 tristate "UltraSPARC-IIe CPU Frequency driver"
173 select CPU_FREQ_TABLE
175 This adds the CPUFreq driver for UltraSPARC-IIe processors.
177 For details, take a look at <file:Documentation/cpu-freq>.
181 # Global things across all Sun machines.
182 config RWSEM_GENERIC_SPINLOCK
185 config RWSEM_XCHGADD_ALGORITHM
189 config GENERIC_FIND_NEXT_BIT
193 config GENERIC_HWEIGHT
195 default y if !ULTRA_HAS_POPULATION_COUNT
197 config GENERIC_CALIBRATE_DELAY
202 prompt "SPARC64 Huge TLB Page Size"
203 depends on HUGETLB_PAGE
204 default HUGETLB_PAGE_SIZE_4MB
206 config HUGETLB_PAGE_SIZE_4MB
209 config HUGETLB_PAGE_SIZE_512K
210 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
213 config HUGETLB_PAGE_SIZE_64K
214 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
221 config ARCH_SELECT_MEMORY_MODEL
224 config ARCH_SPARSEMEM_ENABLE
227 config ARCH_SPARSEMEM_DEFAULT
239 config GENERIC_ISA_DMA
246 Find out whether you have ISA slots on your motherboard. ISA is the
247 name of a bus system, i.e. the way the CPU talks to the other stuff
248 inside your box. Other bus systems are PCI, EISA, MicroChannel
249 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
250 newer boards don't support it. If you have ISA, say Y, otherwise N.
255 Say Y here if you would like support for ISA Plug and Play devices.
256 Some information is in <file:Documentation/isapnp.txt>.
258 To compile this driver as a module, choose M here: the
259 module will be called isapnp.
266 The Extended Industry Standard Architecture (EISA) bus was
267 developed as an open alternative to the IBM MicroChannel bus.
269 The EISA bus provided some of the features of the IBM MicroChannel
270 bus while maintaining backward compatibility with cards made for
271 the older ISA bus. The EISA bus saw limited use between 1988 and
272 1995 when it was made obsolete by the PCI bus.
274 Say Y here if you are building a kernel for an EISA-based machine.
281 MicroChannel Architecture is found in some IBM PS/2 machines and
282 laptops. It is a bus system similar to PCI or ISA. See
283 <file:Documentation/mca.txt> (and especially the web page given
284 there) before attempting to build an MCA bus kernel.
289 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
290 computer. These are credit-card size devices such as network cards,
291 modems or hard drives often used with laptops computers. There are
292 actually two varieties of these cards: the older 16 bit PCMCIA cards
293 and the newer 32 bit CardBus cards. If you want to use CardBus
294 cards, you need to say Y here and also to "CardBus support" below.
296 To use your PC-cards, you will need supporting software from David
297 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
298 for location). Please also read the PCMCIA-HOWTO, available from
299 <http://www.tldp.org/docs.html#howto>.
301 To compile this driver as modules, choose M here: the
302 modules will be called pcmcia_core and ds.
323 Find out whether you have a PCI motherboard. PCI is the name of a
324 bus system, i.e. the way the CPU talks to the other stuff inside
325 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
326 VESA. If you have PCI, say Y, otherwise N.
328 The PCI-HOWTO, available from
329 <http://www.tldp.org/docs.html#howto>, contains valuable
330 information about which PCI hardware does work under Linux and which
337 source "drivers/pci/Kconfig"
339 config SUN_OPENPROMFS
340 tristate "Openprom tree appears in /proc/openprom"
342 If you say Y, the OpenPROM device tree will be available as a
343 virtual file system, which you can mount to /proc/openprom by "mount
344 -t openpromfs none /proc/openprom".
346 To compile the /proc/openprom support as a module, choose M here: the
347 module will be called openpromfs. If unsure, choose M.
349 config SPARC32_COMPAT
350 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
352 This allows you to run 32-bit binaries on your Ultra.
353 Everybody wants this; say Y.
357 depends on SPARC32_COMPAT
361 bool "Kernel support for 32-bit ELF binaries"
362 depends on SPARC32_COMPAT
364 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
365 Everybody wants this; say Y.
368 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
369 depends on SPARC32_COMPAT
371 This allows you to run 32-bit a.out format binaries on your Ultra.
372 If you want to run SunOS binaries (see SunOS binary emulation below)
373 or other a.out binaries, say Y. If unsure, say N.
375 menu "Executable file formats"
377 source "fs/Kconfig.binfmt"
380 bool "SunOS binary emulation"
381 depends on BINFMT_AOUT32
383 This allows you to run most SunOS binaries. If you want to do this,
384 say Y here and place appropriate files in /usr/gnemul/sunos. See
385 <http://www.ultralinux.org/faq.html> for more information. If you
386 want to run SunOS binaries on an Ultra you must also say Y to
387 "Kernel support for 32-bit a.out binaries" above.
390 tristate "Solaris binary emulation (EXPERIMENTAL)"
391 depends on SPARC32_COMPAT && EXPERIMENTAL
393 This is experimental code which will enable you to run (many)
394 Solaris binaries on your SPARC Linux machine.
396 To compile this code as a module, choose M here: the
397 module will be called solaris.
402 bool "SMT (Hyperthreading) scheduler support"
406 SMT scheduler support improves the CPU scheduler's decision making
407 when dealing with UltraSPARC cpus at a cost of slightly increased
408 overhead in some places. If unsure say N here.
411 bool "Default bootloader kernel arguments"
414 string "Initial kernel command string"
415 depends on CMDLINE_BOOL
416 default "console=ttyS0,9600 root=/dev/sda1"
418 Say Y here if you want to be able to pass default arguments to
419 the kernel. This will be overridden by the bootloader, if you
420 use one (such as SILO). This is most useful if you want to boot
421 a kernel from TFTP, and want default options to be available
422 with having them passed on the command line.
424 NOTE: This option WILL override the PROM bootargs setting!
428 source "drivers/Kconfig"
430 source "drivers/sbus/char/Kconfig"
432 source "drivers/fc4/Kconfig"
436 menu "Instrumentation Support"
437 depends on EXPERIMENTAL
439 source "arch/sparc64/oprofile/Kconfig"
442 bool "Kprobes (EXPERIMENTAL)"
443 depends on KALLSYMS && EXPERIMENTAL && MODULES
445 Kprobes allows you to trap at almost any kernel address and
446 execute a callback function. register_kprobe() establishes
447 a probepoint and specifies the callback. Kprobes is useful
448 for kernel debugging, non-intrusive instrumentation and testing.
449 If in doubt, say "N".
452 source "arch/sparc64/Kconfig.debug"
454 source "security/Kconfig"
456 source "crypto/Kconfig"