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"
13 select HAVE_KRETPROBES
21 SPARC is a family of RISC microprocessors designed and marketed by
22 Sun Microsystems, incorporated. This port covers the newer 64-bit
23 UltraSPARC. The UltraLinux project maintains both the SPARC32 and
24 SPARC64 ports; its web page is available at
25 <http://www.ultralinux.org/>.
31 config GENERIC_CMOS_UPDATE
35 config GENERIC_CLOCKEVENTS
54 config STACKTRACE_SUPPORT
58 config LOCKDEP_SUPPORT
62 config ARCH_MAY_HAVE_PC_FDC
66 config ARCH_HAS_ILOG2_U32
70 config ARCH_HAS_ILOG2_U64
78 config HAVE_SETUP_PER_CPU_AREA
81 config ARCH_NO_VIRT_TO_BUS
87 config GENERIC_HARDIRQS_NO__DO_IRQ
92 prompt "Kernel page size"
93 default SPARC64_PAGE_SIZE_8KB
95 config SPARC64_PAGE_SIZE_8KB
98 This lets you select the page size of the kernel.
100 8KB and 64KB work quite well, since Sparc ELF sections
101 provide for up to 64KB alignment.
103 Therefore, 512KB and 4MB are for expert hackers only.
105 If you don't know what to do, choose 8KB.
107 config SPARC64_PAGE_SIZE_64KB
110 config SPARC64_PAGE_SIZE_512KB
113 config SPARC64_PAGE_SIZE_4MB
119 bool "Enable seccomp to safely compute untrusted bytecode"
123 This kernel feature is useful for number crunching applications
124 that may need to compute untrusted bytecode during their
125 execution. By using pipes or other transports made available to
126 the process as file descriptors supporting the read/write
127 syscalls, it's possible to isolate those applications in
128 their own address space using seccomp. Once seccomp is
129 enabled via /proc/<pid>/seccomp, it cannot be disabled
130 and the task is only allowed to execute a few safe syscalls
131 defined by each seccomp mode.
133 If unsure, say Y. Only embedded should say N here.
135 source kernel/Kconfig.hz
138 bool "Support for hot-pluggable CPUs"
142 Say Y here to experiment with turning CPUs off and on. CPUs
143 can be controlled through /sys/devices/system/cpu/cpu#.
144 Say N if you want to disable CPU hotplug.
146 source "init/Kconfig"
148 config GENERIC_HARDIRQS
152 menu "General machine setup"
154 source "kernel/time/Kconfig"
157 bool "Symmetric multi-processing support"
159 This enables support for systems with more than one CPU. If you have
160 a system with only one CPU, say N. If you have a system with more than
163 If you say N here, the kernel will run on single and multiprocessor
164 machines, but will use only one CPU of a multiprocessor machine. If
165 you say Y here, the kernel will run on many, but not all,
166 singleprocessor machines. On a singleprocessor machine, the kernel
167 will run faster if you say N here.
169 People using multiprocessor machines who say Y here should also say
170 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
171 Management" code will be disabled if you say Y here.
173 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
174 available at <http://www.tldp.org/docs.html#howto>.
176 If you don't know what to do here, say N.
179 int "Maximum number of CPUs (2-1024)"
184 source "drivers/cpufreq/Kconfig"
187 tristate "UltraSPARC-III CPU Frequency driver"
189 select CPU_FREQ_TABLE
191 This adds the CPUFreq driver for UltraSPARC-III processors.
193 For details, take a look at <file:Documentation/cpu-freq>.
198 tristate "UltraSPARC-IIe CPU Frequency driver"
200 select CPU_FREQ_TABLE
202 This adds the CPUFreq driver for UltraSPARC-IIe processors.
204 For details, take a look at <file:Documentation/cpu-freq>.
208 # Global things across all Sun machines.
209 config GENERIC_LOCKBREAK
212 depends on SMP && PREEMPT
214 config RWSEM_GENERIC_SPINLOCK
217 config RWSEM_XCHGADD_ALGORITHM
221 config GENERIC_FIND_NEXT_BIT
225 config GENERIC_HWEIGHT
227 default y if !ULTRA_HAS_POPULATION_COUNT
229 config GENERIC_CALIBRATE_DELAY
234 prompt "SPARC64 Huge TLB Page Size"
235 depends on HUGETLB_PAGE
236 default HUGETLB_PAGE_SIZE_4MB
238 config HUGETLB_PAGE_SIZE_4MB
241 config HUGETLB_PAGE_SIZE_512K
242 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
245 config HUGETLB_PAGE_SIZE_64K
246 depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
253 config ARCH_SELECT_MEMORY_MODEL
256 config ARCH_SPARSEMEM_ENABLE
258 select SPARSEMEM_VMEMMAP_ENABLE
260 config ARCH_SPARSEMEM_DEFAULT
268 Find out whether you have ISA slots on your motherboard. ISA is the
269 name of a bus system, i.e. the way the CPU talks to the other stuff
270 inside your box. Other bus systems are PCI, EISA, MicroChannel
271 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
272 newer boards don't support it. If you have ISA, say Y, otherwise N.
277 Say Y here if you would like support for ISA Plug and Play devices.
278 Some information is in <file:Documentation/isapnp.txt>.
280 To compile this driver as a module, choose M here: the
281 module will be called isapnp.
288 The Extended Industry Standard Architecture (EISA) bus was
289 developed as an open alternative to the IBM MicroChannel bus.
291 The EISA bus provided some of the features of the IBM MicroChannel
292 bus while maintaining backward compatibility with cards made for
293 the older ISA bus. The EISA bus saw limited use between 1988 and
294 1995 when it was made obsolete by the PCI bus.
296 Say Y here if you are building a kernel for an EISA-based machine.
303 MicroChannel Architecture is found in some IBM PS/2 machines and
304 laptops. It is a bus system similar to PCI or ISA. See
305 <file:Documentation/mca.txt> (and especially the web page given
306 there) before attempting to build an MCA bus kernel.
311 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
312 computer. These are credit-card size devices such as network cards,
313 modems or hard drives often used with laptops computers. There are
314 actually two varieties of these cards: the older 16 bit PCMCIA cards
315 and the newer 32 bit CardBus cards. If you want to use CardBus
316 cards, you need to say Y here and also to "CardBus support" below.
318 To use your PC-cards, you will need supporting software from David
319 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
320 for location). Please also read the PCMCIA-HOWTO, available from
321 <http://www.tldp.org/docs.html#howto>.
323 To compile this driver as modules, choose M here: the
324 modules will be called pcmcia_core and ds.
343 bool "Sun Logical Domains support"
345 Say Y here is you want to support virtual devices via
350 select ARCH_SUPPORTS_MSI
352 Find out whether you have a PCI motherboard. PCI is the name of a
353 bus system, i.e. the way the CPU talks to the other stuff inside
354 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
355 VESA. If you have PCI, say Y, otherwise N.
363 source "drivers/pci/Kconfig"
365 config SUN_OPENPROMFS
366 tristate "Openprom tree appears in /proc/openprom"
368 If you say Y, the OpenPROM device tree will be available as a
369 virtual file system, which you can mount to /proc/openprom by "mount
370 -t openpromfs none /proc/openprom".
372 To compile the /proc/openprom support as a module, choose M here: the
373 module will be called openpromfs. If unsure, choose M.
375 menu "Executable file formats"
377 source "fs/Kconfig.binfmt"
379 config SPARC32_COMPAT
380 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
382 This allows you to run 32-bit binaries on your Ultra.
383 Everybody wants this; say Y.
387 depends on SPARC32_COMPAT
389 select COMPAT_BINFMT_ELF
391 config SYSVIPC_COMPAT
393 depends on COMPAT && SYSVIPC
399 bool "SMT (Hyperthreading) scheduler support"
403 SMT scheduler support improves the CPU scheduler's decision making
404 when dealing with UltraSPARC cpus at a cost of slightly increased
405 overhead in some places. If unsure say N here.
408 bool "Multi-core scheduler support"
412 Multi-core scheduler support improves the CPU scheduler's decision
413 making when dealing with multi-core CPU chips at a cost of slightly
414 increased overhead in some places. If unsure say N here.
416 source "kernel/Kconfig.preempt"
419 bool "Default bootloader kernel arguments"
422 string "Initial kernel command string"
423 depends on CMDLINE_BOOL
424 default "console=ttyS0,9600 root=/dev/sda1"
426 Say Y here if you want to be able to pass default arguments to
427 the kernel. This will be overridden by the bootloader, if you
428 use one (such as SILO). This is most useful if you want to boot
429 a kernel from TFTP, and want default options to be available
430 with having them passed on the command line.
432 NOTE: This option WILL override the PROM bootargs setting!
436 source "drivers/Kconfig"
438 source "drivers/sbus/char/Kconfig"
442 source "arch/sparc64/Kconfig.debug"
444 source "security/Kconfig"
446 source "crypto/Kconfig"