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/>.
26 config GENERIC_CMOS_UPDATE
30 config GENERIC_CLOCKEVENTS
45 config STACKTRACE_SUPPORT
49 config LOCKDEP_SUPPORT
53 config ARCH_MAY_HAVE_PC_FDC
57 config ARCH_HAS_ILOG2_U32
61 config ARCH_HAS_ILOG2_U64
69 config HAVE_SETUP_PER_CPU_AREA
72 config ARCH_NO_VIRT_TO_BUS
78 config GENERIC_HARDIRQS_NO__DO_IRQ
83 prompt "Kernel page size"
84 default SPARC64_PAGE_SIZE_8KB
86 config SPARC64_PAGE_SIZE_8KB
89 This lets you select the page size of the kernel.
91 8KB and 64KB work quite well, since Sparc ELF sections
92 provide for up to 64KB alignment.
94 Therefore, 512KB and 4MB are for expert hackers only.
96 If you don't know what to do, choose 8KB.
98 config SPARC64_PAGE_SIZE_64KB
101 config SPARC64_PAGE_SIZE_512KB
104 config SPARC64_PAGE_SIZE_4MB
110 bool "Enable seccomp to safely compute untrusted bytecode"
114 This kernel feature is useful for number crunching applications
115 that may need to compute untrusted bytecode during their
116 execution. By using pipes or other transports made available to
117 the process as file descriptors supporting the read/write
118 syscalls, it's possible to isolate those applications in
119 their own address space using seccomp. Once seccomp is
120 enabled via /proc/<pid>/seccomp, it cannot be disabled
121 and the task is only allowed to execute a few safe syscalls
122 defined by each seccomp mode.
124 If unsure, say Y. Only embedded should say N here.
126 source kernel/Kconfig.hz
129 bool "Support for hot-pluggable CPUs"
133 Say Y here to experiment with turning CPUs off and on. CPUs
134 can be controlled through /sys/devices/system/cpu/cpu#.
135 Say N if you want to disable CPU hotplug.
137 source "init/Kconfig"
139 config SYSVIPC_COMPAT
141 depends on COMPAT && SYSVIPC
144 config GENERIC_HARDIRQS
148 menu "General machine setup"
150 source "kernel/time/Kconfig"
153 bool "Symmetric multi-processing support"
155 This enables support for systems with more than one CPU. If you have
156 a system with only one CPU, say N. If you have a system with more than
159 If you say N here, the kernel will run on single and multiprocessor
160 machines, but will use only one CPU of a multiprocessor machine. If
161 you say Y here, the kernel will run on many, but not all,
162 singleprocessor machines. On a singleprocessor machine, the kernel
163 will run faster if you say N here.
165 People using multiprocessor machines who say Y here should also say
166 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
167 Management" code will be disabled if you say Y here.
169 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
170 available at <http://www.tldp.org/docs.html#howto>.
172 If you don't know what to do here, say N.
175 int "Maximum number of CPUs (2-1024)"
180 source "drivers/cpufreq/Kconfig"
183 tristate "UltraSPARC-III CPU Frequency driver"
185 select CPU_FREQ_TABLE
187 This adds the CPUFreq driver for UltraSPARC-III processors.
189 For details, take a look at <file:Documentation/cpu-freq>.
194 tristate "UltraSPARC-IIe CPU Frequency driver"
196 select CPU_FREQ_TABLE
198 This adds the CPUFreq driver for UltraSPARC-IIe processors.
200 For details, take a look at <file:Documentation/cpu-freq>.
204 # Global things across all Sun machines.
205 config GENERIC_LOCKBREAK
208 depends on SMP && PREEMPT
210 config RWSEM_GENERIC_SPINLOCK
213 config RWSEM_XCHGADD_ALGORITHM
217 config GENERIC_FIND_NEXT_BIT
221 config GENERIC_HWEIGHT
223 default y if !ULTRA_HAS_POPULATION_COUNT
225 config GENERIC_CALIBRATE_DELAY
230 prompt "SPARC64 Huge TLB Page Size"
231 depends on HUGETLB_PAGE
232 default HUGETLB_PAGE_SIZE_4MB
234 config HUGETLB_PAGE_SIZE_4MB
237 config HUGETLB_PAGE_SIZE_512K
238 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
241 config HUGETLB_PAGE_SIZE_64K
242 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
249 config ARCH_SELECT_MEMORY_MODEL
252 config ARCH_SPARSEMEM_ENABLE
254 select SPARSEMEM_VMEMMAP_ENABLE
256 config ARCH_SPARSEMEM_DEFAULT
264 Find out whether you have ISA slots on your motherboard. ISA is the
265 name of a bus system, i.e. the way the CPU talks to the other stuff
266 inside your box. Other bus systems are PCI, EISA, MicroChannel
267 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
268 newer boards don't support it. If you have ISA, say Y, otherwise N.
273 Say Y here if you would like support for ISA Plug and Play devices.
274 Some information is in <file:Documentation/isapnp.txt>.
276 To compile this driver as a module, choose M here: the
277 module will be called isapnp.
284 The Extended Industry Standard Architecture (EISA) bus was
285 developed as an open alternative to the IBM MicroChannel bus.
287 The EISA bus provided some of the features of the IBM MicroChannel
288 bus while maintaining backward compatibility with cards made for
289 the older ISA bus. The EISA bus saw limited use between 1988 and
290 1995 when it was made obsolete by the PCI bus.
292 Say Y here if you are building a kernel for an EISA-based machine.
299 MicroChannel Architecture is found in some IBM PS/2 machines and
300 laptops. It is a bus system similar to PCI or ISA. See
301 <file:Documentation/mca.txt> (and especially the web page given
302 there) before attempting to build an MCA bus kernel.
307 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
308 computer. These are credit-card size devices such as network cards,
309 modems or hard drives often used with laptops computers. There are
310 actually two varieties of these cards: the older 16 bit PCMCIA cards
311 and the newer 32 bit CardBus cards. If you want to use CardBus
312 cards, you need to say Y here and also to "CardBus support" below.
314 To use your PC-cards, you will need supporting software from David
315 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
316 for location). Please also read the PCMCIA-HOWTO, available from
317 <http://www.tldp.org/docs.html#howto>.
319 To compile this driver as modules, choose M here: the
320 modules will be called pcmcia_core and ds.
339 bool "Sun Logical Domains support"
341 Say Y here is you want to support virtual devices via
346 select ARCH_SUPPORTS_MSI
348 Find out whether you have a PCI motherboard. PCI is the name of a
349 bus system, i.e. the way the CPU talks to the other stuff inside
350 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
351 VESA. If you have PCI, say Y, otherwise N.
359 source "drivers/pci/Kconfig"
361 config SUN_OPENPROMFS
362 tristate "Openprom tree appears in /proc/openprom"
364 If you say Y, the OpenPROM device tree will be available as a
365 virtual file system, which you can mount to /proc/openprom by "mount
366 -t openpromfs none /proc/openprom".
368 To compile the /proc/openprom support as a module, choose M here: the
369 module will be called openpromfs. If unsure, choose M.
371 config SPARC32_COMPAT
372 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
374 This allows you to run 32-bit binaries on your Ultra.
375 Everybody wants this; say Y.
379 depends on SPARC32_COMPAT
383 bool "Kernel support for 32-bit ELF binaries"
384 depends on SPARC32_COMPAT
386 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
387 Everybody wants this; say Y.
390 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
391 depends on SPARC32_COMPAT
393 This allows you to run 32-bit a.out format binaries on your Ultra.
394 If you want to run SunOS binaries (see SunOS binary emulation below)
395 or other a.out binaries, say Y. If unsure, say N.
397 menu "Executable file formats"
399 source "fs/Kconfig.binfmt"
402 bool "SunOS binary emulation"
403 depends on BINFMT_AOUT32
405 This allows you to run most SunOS binaries. If you want to do this,
406 say Y here and place appropriate files in /usr/gnemul/sunos. See
407 <http://www.ultralinux.org/faq.html> for more information. If you
408 want to run SunOS binaries on an Ultra you must also say Y to
409 "Kernel support for 32-bit a.out binaries" above.
412 tristate "Solaris binary emulation (EXPERIMENTAL)"
413 depends on SPARC32_COMPAT && NET && EXPERIMENTAL
415 This is experimental code which will enable you to run (many)
416 Solaris binaries on your SPARC Linux machine.
418 To compile this code as a module, choose M here: the
419 module will be called solaris.
424 bool "SMT (Hyperthreading) scheduler support"
428 SMT scheduler support improves the CPU scheduler's decision making
429 when dealing with UltraSPARC cpus at a cost of slightly increased
430 overhead in some places. If unsure say N here.
433 bool "Multi-core scheduler support"
437 Multi-core scheduler support improves the CPU scheduler's decision
438 making when dealing with multi-core CPU chips at a cost of slightly
439 increased overhead in some places. If unsure say N here.
441 source "kernel/Kconfig.preempt"
444 bool "Default bootloader kernel arguments"
447 string "Initial kernel command string"
448 depends on CMDLINE_BOOL
449 default "console=ttyS0,9600 root=/dev/sda1"
451 Say Y here if you want to be able to pass default arguments to
452 the kernel. This will be overridden by the bootloader, if you
453 use one (such as SILO). This is most useful if you want to boot
454 a kernel from TFTP, and want default options to be available
455 with having them passed on the command line.
457 NOTE: This option WILL override the PROM bootargs setting!
461 source "drivers/Kconfig"
463 source "drivers/sbus/char/Kconfig"
467 source "kernel/Kconfig.instrumentation"
469 source "arch/sparc64/Kconfig.debug"
471 source "security/Kconfig"
473 source "crypto/Kconfig"