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"
19 SPARC is a family of RISC microprocessors designed and marketed by
20 Sun Microsystems, incorporated. This port covers the newer 64-bit
21 UltraSPARC. The UltraLinux project maintains both the SPARC32 and
22 SPARC64 ports; its web page is available at
23 <http://www.ultralinux.org/>.
29 config GENERIC_CMOS_UPDATE
33 config GENERIC_CLOCKEVENTS
52 config STACKTRACE_SUPPORT
56 config LOCKDEP_SUPPORT
60 config ARCH_MAY_HAVE_PC_FDC
64 config ARCH_HAS_ILOG2_U32
68 config ARCH_HAS_ILOG2_U64
76 config HAVE_SETUP_PER_CPU_AREA
79 config ARCH_NO_VIRT_TO_BUS
85 config GENERIC_HARDIRQS_NO__DO_IRQ
89 config ARCH_SUPPORTS_AOUT
93 prompt "Kernel page size"
94 default SPARC64_PAGE_SIZE_8KB
96 config SPARC64_PAGE_SIZE_8KB
99 This lets you select the page size of the kernel.
101 8KB and 64KB work quite well, since Sparc ELF sections
102 provide for up to 64KB alignment.
104 Therefore, 512KB and 4MB are for expert hackers only.
106 If you don't know what to do, choose 8KB.
108 config SPARC64_PAGE_SIZE_64KB
111 config SPARC64_PAGE_SIZE_512KB
114 config SPARC64_PAGE_SIZE_4MB
120 bool "Enable seccomp to safely compute untrusted bytecode"
124 This kernel feature is useful for number crunching applications
125 that may need to compute untrusted bytecode during their
126 execution. By using pipes or other transports made available to
127 the process as file descriptors supporting the read/write
128 syscalls, it's possible to isolate those applications in
129 their own address space using seccomp. Once seccomp is
130 enabled via /proc/<pid>/seccomp, it cannot be disabled
131 and the task is only allowed to execute a few safe syscalls
132 defined by each seccomp mode.
134 If unsure, say Y. Only embedded should say N here.
136 source kernel/Kconfig.hz
139 bool "Support for hot-pluggable CPUs"
143 Say Y here to experiment with turning CPUs off and on. CPUs
144 can be controlled through /sys/devices/system/cpu/cpu#.
145 Say N if you want to disable CPU hotplug.
147 source "init/Kconfig"
149 config SYSVIPC_COMPAT
151 depends on COMPAT && SYSVIPC
154 config GENERIC_HARDIRQS
158 menu "General machine setup"
160 source "kernel/time/Kconfig"
163 bool "Symmetric multi-processing support"
165 This enables support for systems with more than one CPU. If you have
166 a system with only one CPU, say N. If you have a system with more than
169 If you say N here, the kernel will run on single and multiprocessor
170 machines, but will use only one CPU of a multiprocessor machine. If
171 you say Y here, the kernel will run on many, but not all,
172 singleprocessor machines. On a singleprocessor machine, the kernel
173 will run faster if you say N here.
175 People using multiprocessor machines who say Y here should also say
176 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
177 Management" code will be disabled if you say Y here.
179 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
180 available at <http://www.tldp.org/docs.html#howto>.
182 If you don't know what to do here, say N.
185 int "Maximum number of CPUs (2-1024)"
190 source "drivers/cpufreq/Kconfig"
193 tristate "UltraSPARC-III CPU Frequency driver"
195 select CPU_FREQ_TABLE
197 This adds the CPUFreq driver for UltraSPARC-III processors.
199 For details, take a look at <file:Documentation/cpu-freq>.
204 tristate "UltraSPARC-IIe CPU Frequency driver"
206 select CPU_FREQ_TABLE
208 This adds the CPUFreq driver for UltraSPARC-IIe processors.
210 For details, take a look at <file:Documentation/cpu-freq>.
214 # Global things across all Sun machines.
215 config GENERIC_LOCKBREAK
218 depends on SMP && PREEMPT
220 config RWSEM_GENERIC_SPINLOCK
223 config RWSEM_XCHGADD_ALGORITHM
227 config GENERIC_FIND_NEXT_BIT
231 config GENERIC_HWEIGHT
233 default y if !ULTRA_HAS_POPULATION_COUNT
235 config GENERIC_CALIBRATE_DELAY
240 prompt "SPARC64 Huge TLB Page Size"
241 depends on HUGETLB_PAGE
242 default HUGETLB_PAGE_SIZE_4MB
244 config HUGETLB_PAGE_SIZE_4MB
247 config HUGETLB_PAGE_SIZE_512K
248 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
251 config HUGETLB_PAGE_SIZE_64K
252 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
259 config ARCH_SELECT_MEMORY_MODEL
262 config ARCH_SPARSEMEM_ENABLE
264 select SPARSEMEM_VMEMMAP_ENABLE
266 config ARCH_SPARSEMEM_DEFAULT
274 Find out whether you have ISA slots on your motherboard. ISA is the
275 name of a bus system, i.e. the way the CPU talks to the other stuff
276 inside your box. Other bus systems are PCI, EISA, MicroChannel
277 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
278 newer boards don't support it. If you have ISA, say Y, otherwise N.
283 Say Y here if you would like support for ISA Plug and Play devices.
284 Some information is in <file:Documentation/isapnp.txt>.
286 To compile this driver as a module, choose M here: the
287 module will be called isapnp.
294 The Extended Industry Standard Architecture (EISA) bus was
295 developed as an open alternative to the IBM MicroChannel bus.
297 The EISA bus provided some of the features of the IBM MicroChannel
298 bus while maintaining backward compatibility with cards made for
299 the older ISA bus. The EISA bus saw limited use between 1988 and
300 1995 when it was made obsolete by the PCI bus.
302 Say Y here if you are building a kernel for an EISA-based machine.
309 MicroChannel Architecture is found in some IBM PS/2 machines and
310 laptops. It is a bus system similar to PCI or ISA. See
311 <file:Documentation/mca.txt> (and especially the web page given
312 there) before attempting to build an MCA bus kernel.
317 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
318 computer. These are credit-card size devices such as network cards,
319 modems or hard drives often used with laptops computers. There are
320 actually two varieties of these cards: the older 16 bit PCMCIA cards
321 and the newer 32 bit CardBus cards. If you want to use CardBus
322 cards, you need to say Y here and also to "CardBus support" below.
324 To use your PC-cards, you will need supporting software from David
325 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
326 for location). Please also read the PCMCIA-HOWTO, available from
327 <http://www.tldp.org/docs.html#howto>.
329 To compile this driver as modules, choose M here: the
330 modules will be called pcmcia_core and ds.
349 bool "Sun Logical Domains support"
351 Say Y here is you want to support virtual devices via
356 select ARCH_SUPPORTS_MSI
358 Find out whether you have a PCI motherboard. PCI is the name of a
359 bus system, i.e. the way the CPU talks to the other stuff inside
360 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
361 VESA. If you have PCI, say Y, otherwise N.
369 source "drivers/pci/Kconfig"
371 config SUN_OPENPROMFS
372 tristate "Openprom tree appears in /proc/openprom"
374 If you say Y, the OpenPROM device tree will be available as a
375 virtual file system, which you can mount to /proc/openprom by "mount
376 -t openpromfs none /proc/openprom".
378 To compile the /proc/openprom support as a module, choose M here: the
379 module will be called openpromfs. If unsure, choose M.
381 config SPARC32_COMPAT
382 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
384 This allows you to run 32-bit binaries on your Ultra.
385 Everybody wants this; say Y.
389 depends on SPARC32_COMPAT
391 select COMPAT_BINFMT_ELF
394 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
395 depends on SPARC32_COMPAT && ARCH_SUPPORTS_AOUT
397 This allows you to run 32-bit a.out format binaries on your Ultra.
398 If you want to run SunOS binaries (see SunOS binary emulation below)
399 or other a.out binaries, say Y. If unsure, say N.
401 menu "Executable file formats"
403 source "fs/Kconfig.binfmt"
406 bool "SunOS binary emulation"
407 depends on BINFMT_AOUT32
409 This allows you to run most SunOS binaries. If you want to do this,
410 say Y here and place appropriate files in /usr/gnemul/sunos. See
411 <http://www.ultralinux.org/faq.html> for more information. If you
412 want to run SunOS binaries on an Ultra you must also say Y to
413 "Kernel support for 32-bit a.out binaries" above.
416 tristate "Solaris binary emulation (EXPERIMENTAL)"
417 depends on SPARC32_COMPAT && NET && EXPERIMENTAL
419 This is experimental code which will enable you to run (many)
420 Solaris binaries on your SPARC Linux machine.
422 To compile this code as a module, choose M here: the
423 module will be called solaris.
428 bool "SMT (Hyperthreading) scheduler support"
432 SMT scheduler support improves the CPU scheduler's decision making
433 when dealing with UltraSPARC cpus at a cost of slightly increased
434 overhead in some places. If unsure say N here.
437 bool "Multi-core scheduler support"
441 Multi-core scheduler support improves the CPU scheduler's decision
442 making when dealing with multi-core CPU chips at a cost of slightly
443 increased overhead in some places. If unsure say N here.
445 source "kernel/Kconfig.preempt"
448 bool "Default bootloader kernel arguments"
451 string "Initial kernel command string"
452 depends on CMDLINE_BOOL
453 default "console=ttyS0,9600 root=/dev/sda1"
455 Say Y here if you want to be able to pass default arguments to
456 the kernel. This will be overridden by the bootloader, if you
457 use one (such as SILO). This is most useful if you want to boot
458 a kernel from TFTP, and want default options to be available
459 with having them passed on the command line.
461 NOTE: This option WILL override the PROM bootargs setting!
465 source "drivers/Kconfig"
467 source "drivers/sbus/char/Kconfig"
471 source "arch/sparc64/Kconfig.debug"
473 source "security/Kconfig"
475 source "crypto/Kconfig"