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
48 config STACKTRACE_SUPPORT
52 config LOCKDEP_SUPPORT
56 config ARCH_MAY_HAVE_PC_FDC
60 config ARCH_HAS_ILOG2_U32
64 config ARCH_HAS_ILOG2_U64
72 config HAVE_SETUP_PER_CPU_AREA
75 config ARCH_NO_VIRT_TO_BUS
81 config GENERIC_HARDIRQS_NO__DO_IRQ
85 config ARCH_SUPPORTS_AOUT
89 prompt "Kernel page size"
90 default SPARC64_PAGE_SIZE_8KB
92 config SPARC64_PAGE_SIZE_8KB
95 This lets you select the page size of the kernel.
97 8KB and 64KB work quite well, since Sparc ELF sections
98 provide for up to 64KB alignment.
100 Therefore, 512KB and 4MB are for expert hackers only.
102 If you don't know what to do, choose 8KB.
104 config SPARC64_PAGE_SIZE_64KB
107 config SPARC64_PAGE_SIZE_512KB
110 config SPARC64_PAGE_SIZE_4MB
116 bool "Enable seccomp to safely compute untrusted bytecode"
120 This kernel feature is useful for number crunching applications
121 that may need to compute untrusted bytecode during their
122 execution. By using pipes or other transports made available to
123 the process as file descriptors supporting the read/write
124 syscalls, it's possible to isolate those applications in
125 their own address space using seccomp. Once seccomp is
126 enabled via /proc/<pid>/seccomp, it cannot be disabled
127 and the task is only allowed to execute a few safe syscalls
128 defined by each seccomp mode.
130 If unsure, say Y. Only embedded should say N here.
132 source kernel/Kconfig.hz
135 bool "Support for hot-pluggable CPUs"
139 Say Y here to experiment with turning CPUs off and on. CPUs
140 can be controlled through /sys/devices/system/cpu/cpu#.
141 Say N if you want to disable CPU hotplug.
143 source "init/Kconfig"
145 config SYSVIPC_COMPAT
147 depends on COMPAT && SYSVIPC
150 config GENERIC_HARDIRQS
154 menu "General machine setup"
156 source "kernel/time/Kconfig"
159 bool "Symmetric multi-processing support"
161 This enables support for systems with more than one CPU. If you have
162 a system with only one CPU, say N. If you have a system with more than
165 If you say N here, the kernel will run on single and multiprocessor
166 machines, but will use only one CPU of a multiprocessor machine. If
167 you say Y here, the kernel will run on many, but not all,
168 singleprocessor machines. On a singleprocessor machine, the kernel
169 will run faster if you say N here.
171 People using multiprocessor machines who say Y here should also say
172 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
173 Management" code will be disabled if you say Y here.
175 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
176 available at <http://www.tldp.org/docs.html#howto>.
178 If you don't know what to do here, say N.
181 int "Maximum number of CPUs (2-1024)"
186 source "drivers/cpufreq/Kconfig"
189 tristate "UltraSPARC-III CPU Frequency driver"
191 select CPU_FREQ_TABLE
193 This adds the CPUFreq driver for UltraSPARC-III processors.
195 For details, take a look at <file:Documentation/cpu-freq>.
200 tristate "UltraSPARC-IIe CPU Frequency driver"
202 select CPU_FREQ_TABLE
204 This adds the CPUFreq driver for UltraSPARC-IIe processors.
206 For details, take a look at <file:Documentation/cpu-freq>.
210 # Global things across all Sun machines.
211 config GENERIC_LOCKBREAK
214 depends on SMP && PREEMPT
216 config RWSEM_GENERIC_SPINLOCK
219 config RWSEM_XCHGADD_ALGORITHM
223 config GENERIC_FIND_NEXT_BIT
227 config GENERIC_HWEIGHT
229 default y if !ULTRA_HAS_POPULATION_COUNT
231 config GENERIC_CALIBRATE_DELAY
236 prompt "SPARC64 Huge TLB Page Size"
237 depends on HUGETLB_PAGE
238 default HUGETLB_PAGE_SIZE_4MB
240 config HUGETLB_PAGE_SIZE_4MB
243 config HUGETLB_PAGE_SIZE_512K
244 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
247 config HUGETLB_PAGE_SIZE_64K
248 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
255 config ARCH_SELECT_MEMORY_MODEL
258 config ARCH_SPARSEMEM_ENABLE
260 select SPARSEMEM_VMEMMAP_ENABLE
262 config ARCH_SPARSEMEM_DEFAULT
270 Find out whether you have ISA slots on your motherboard. ISA is the
271 name of a bus system, i.e. the way the CPU talks to the other stuff
272 inside your box. Other bus systems are PCI, EISA, MicroChannel
273 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
274 newer boards don't support it. If you have ISA, say Y, otherwise N.
279 Say Y here if you would like support for ISA Plug and Play devices.
280 Some information is in <file:Documentation/isapnp.txt>.
282 To compile this driver as a module, choose M here: the
283 module will be called isapnp.
290 The Extended Industry Standard Architecture (EISA) bus was
291 developed as an open alternative to the IBM MicroChannel bus.
293 The EISA bus provided some of the features of the IBM MicroChannel
294 bus while maintaining backward compatibility with cards made for
295 the older ISA bus. The EISA bus saw limited use between 1988 and
296 1995 when it was made obsolete by the PCI bus.
298 Say Y here if you are building a kernel for an EISA-based machine.
305 MicroChannel Architecture is found in some IBM PS/2 machines and
306 laptops. It is a bus system similar to PCI or ISA. See
307 <file:Documentation/mca.txt> (and especially the web page given
308 there) before attempting to build an MCA bus kernel.
313 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
314 computer. These are credit-card size devices such as network cards,
315 modems or hard drives often used with laptops computers. There are
316 actually two varieties of these cards: the older 16 bit PCMCIA cards
317 and the newer 32 bit CardBus cards. If you want to use CardBus
318 cards, you need to say Y here and also to "CardBus support" below.
320 To use your PC-cards, you will need supporting software from David
321 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
322 for location). Please also read the PCMCIA-HOWTO, available from
323 <http://www.tldp.org/docs.html#howto>.
325 To compile this driver as modules, choose M here: the
326 modules will be called pcmcia_core and ds.
345 bool "Sun Logical Domains support"
347 Say Y here is you want to support virtual devices via
352 select ARCH_SUPPORTS_MSI
354 Find out whether you have a PCI motherboard. PCI is the name of a
355 bus system, i.e. the way the CPU talks to the other stuff inside
356 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
357 VESA. If you have PCI, say Y, otherwise N.
365 source "drivers/pci/Kconfig"
367 config SUN_OPENPROMFS
368 tristate "Openprom tree appears in /proc/openprom"
370 If you say Y, the OpenPROM device tree will be available as a
371 virtual file system, which you can mount to /proc/openprom by "mount
372 -t openpromfs none /proc/openprom".
374 To compile the /proc/openprom support as a module, choose M here: the
375 module will be called openpromfs. If unsure, choose M.
377 config SPARC32_COMPAT
378 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
380 This allows you to run 32-bit binaries on your Ultra.
381 Everybody wants this; say Y.
385 depends on SPARC32_COMPAT
387 select COMPAT_BINFMT_ELF
390 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
391 depends on SPARC32_COMPAT && ARCH_SUPPORTS_AOUT
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 "arch/sparc64/Kconfig.debug"
469 source "security/Kconfig"
471 source "crypto/Kconfig"