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_CLOCKEVENTS
41 config STACKTRACE_SUPPORT
45 config LOCKDEP_SUPPORT
49 config ARCH_MAY_HAVE_PC_FDC
53 config ARCH_HAS_ILOG2_U32
57 config ARCH_HAS_ILOG2_U64
65 config ARCH_NO_VIRT_TO_BUS
69 prompt "Kernel page size"
70 default SPARC64_PAGE_SIZE_8KB
72 config SPARC64_PAGE_SIZE_8KB
75 This lets you select the page size of the kernel.
77 8KB and 64KB work quite well, since Sparc ELF sections
78 provide for up to 64KB alignment.
80 Therefore, 512KB and 4MB are for expert hackers only.
82 If you don't know what to do, choose 8KB.
84 config SPARC64_PAGE_SIZE_64KB
87 config SPARC64_PAGE_SIZE_512KB
90 config SPARC64_PAGE_SIZE_4MB
96 bool "Enable seccomp to safely compute untrusted bytecode"
100 This kernel feature is useful for number crunching applications
101 that may need to compute untrusted bytecode during their
102 execution. By using pipes or other transports made available to
103 the process as file descriptors supporting the read/write
104 syscalls, it's possible to isolate those applications in
105 their own address space using seccomp. Once seccomp is
106 enabled via /proc/<pid>/seccomp, it cannot be disabled
107 and the task is only allowed to execute a few safe syscalls
108 defined by each seccomp mode.
110 If unsure, say Y. Only embedded should say N here.
112 source kernel/Kconfig.hz
115 bool "Support for hot-pluggable CPUs"
119 Say Y here to experiment with turning CPUs off and on. CPUs
120 can be controlled through /sys/devices/system/cpu/cpu#.
121 Say N if you want to disable CPU hotplug.
123 source "init/Kconfig"
125 config SYSVIPC_COMPAT
127 depends on COMPAT && SYSVIPC
130 config GENERIC_HARDIRQS
134 menu "General machine setup"
136 source "kernel/time/Kconfig"
139 bool "Symmetric multi-processing support"
141 This enables support for systems with more than one CPU. If you have
142 a system with only one CPU, say N. If you have a system with more than
145 If you say N here, the kernel will run on single and multiprocessor
146 machines, but will use only one CPU of a multiprocessor machine. If
147 you say Y here, the kernel will run on many, but not all,
148 singleprocessor machines. On a singleprocessor machine, the kernel
149 will run faster if you say N here.
151 People using multiprocessor machines who say Y here should also say
152 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
153 Management" code will be disabled if you say Y here.
155 See also the <file:Documentation/smp.txt>,
156 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
157 <http://www.tldp.org/docs.html#howto>.
159 If you don't know what to do here, say N.
162 int "Maximum number of CPUs (2-1024)"
167 source "drivers/cpufreq/Kconfig"
170 tristate "UltraSPARC-III CPU Frequency driver"
172 select CPU_FREQ_TABLE
174 This adds the CPUFreq driver for UltraSPARC-III processors.
176 For details, take a look at <file:Documentation/cpu-freq>.
181 tristate "UltraSPARC-IIe CPU Frequency driver"
183 select CPU_FREQ_TABLE
185 This adds the CPUFreq driver for UltraSPARC-IIe processors.
187 For details, take a look at <file:Documentation/cpu-freq>.
191 # Global things across all Sun machines.
192 config RWSEM_GENERIC_SPINLOCK
195 config RWSEM_XCHGADD_ALGORITHM
199 config GENERIC_FIND_NEXT_BIT
203 config GENERIC_HWEIGHT
205 default y if !ULTRA_HAS_POPULATION_COUNT
207 config GENERIC_CALIBRATE_DELAY
212 prompt "SPARC64 Huge TLB Page Size"
213 depends on HUGETLB_PAGE
214 default HUGETLB_PAGE_SIZE_4MB
216 config HUGETLB_PAGE_SIZE_4MB
219 config HUGETLB_PAGE_SIZE_512K
220 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
223 config HUGETLB_PAGE_SIZE_64K
224 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
231 config ARCH_SELECT_MEMORY_MODEL
234 config ARCH_SPARSEMEM_ENABLE
237 config ARCH_SPARSEMEM_DEFAULT
239 select SPARSEMEM_STATIC
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.
321 bool "Sun Logical Domains support"
323 Say Y here is you want to support virtual devices via
328 select ARCH_SUPPORTS_MSI
330 Find out whether you have a PCI motherboard. PCI is the name of a
331 bus system, i.e. the way the CPU talks to the other stuff inside
332 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
333 VESA. If you have PCI, say Y, otherwise N.
335 The PCI-HOWTO, available from
336 <http://www.tldp.org/docs.html#howto>, contains valuable
337 information about which PCI hardware does work under Linux and which
346 source "drivers/pci/Kconfig"
348 config SUN_OPENPROMFS
349 tristate "Openprom tree appears in /proc/openprom"
351 If you say Y, the OpenPROM device tree will be available as a
352 virtual file system, which you can mount to /proc/openprom by "mount
353 -t openpromfs none /proc/openprom".
355 To compile the /proc/openprom support as a module, choose M here: the
356 module will be called openpromfs. If unsure, choose M.
358 config SPARC32_COMPAT
359 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
361 This allows you to run 32-bit binaries on your Ultra.
362 Everybody wants this; say Y.
366 depends on SPARC32_COMPAT
370 bool "Kernel support for 32-bit ELF binaries"
371 depends on SPARC32_COMPAT
373 This allows you to run 32-bit Linux/ELF binaries on your Ultra.
374 Everybody wants this; say Y.
377 bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
378 depends on SPARC32_COMPAT
380 This allows you to run 32-bit a.out format binaries on your Ultra.
381 If you want to run SunOS binaries (see SunOS binary emulation below)
382 or other a.out binaries, say Y. If unsure, say N.
384 menu "Executable file formats"
386 source "fs/Kconfig.binfmt"
389 bool "SunOS binary emulation"
390 depends on BINFMT_AOUT32
392 This allows you to run most SunOS binaries. If you want to do this,
393 say Y here and place appropriate files in /usr/gnemul/sunos. See
394 <http://www.ultralinux.org/faq.html> for more information. If you
395 want to run SunOS binaries on an Ultra you must also say Y to
396 "Kernel support for 32-bit a.out binaries" above.
399 tristate "Solaris binary emulation (EXPERIMENTAL)"
400 depends on SPARC32_COMPAT && EXPERIMENTAL
402 This is experimental code which will enable you to run (many)
403 Solaris binaries on your SPARC Linux machine.
405 To compile this code as a module, choose M here: the
406 module will be called solaris.
411 bool "SMT (Hyperthreading) scheduler support"
415 SMT scheduler support improves the CPU scheduler's decision making
416 when dealing with UltraSPARC cpus at a cost of slightly increased
417 overhead in some places. If unsure say N here.
420 bool "Multi-core scheduler support"
424 Multi-core scheduler support improves the CPU scheduler's decision
425 making when dealing with multi-core CPU chips at a cost of slightly
426 increased overhead in some places. If unsure say N here.
428 source "kernel/Kconfig.preempt"
431 bool "Default bootloader kernel arguments"
434 string "Initial kernel command string"
435 depends on CMDLINE_BOOL
436 default "console=ttyS0,9600 root=/dev/sda1"
438 Say Y here if you want to be able to pass default arguments to
439 the kernel. This will be overridden by the bootloader, if you
440 use one (such as SILO). This is most useful if you want to boot
441 a kernel from TFTP, and want default options to be available
442 with having them passed on the command line.
444 NOTE: This option WILL override the PROM bootargs setting!
448 source "drivers/Kconfig"
450 source "drivers/sbus/char/Kconfig"
452 source "drivers/fc4/Kconfig"
456 menu "Instrumentation Support"
457 depends on EXPERIMENTAL
459 source "arch/sparc64/oprofile/Kconfig"
462 bool "Kprobes (EXPERIMENTAL)"
463 depends on KALLSYMS && EXPERIMENTAL && MODULES
465 Kprobes allows you to trap at almost any kernel address and
466 execute a callback function. register_kprobe() establishes
467 a probepoint and specifies the callback. Kprobes is useful
468 for kernel debugging, non-intrusive instrumentation and testing.
469 If in doubt, say "N".
472 source "arch/sparc64/Kconfig.debug"
474 source "security/Kconfig"
476 source "crypto/Kconfig"