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
259 depends on NEED_MULTIPLE_NODES
261 # Some NUMA nodes have memory ranges that span
262 # other nodes. Even though a pfn is valid and
263 # between a node's start and end pfns, it may not
264 # reside on that node. See memmap_init_zone()
266 config NODES_SPAN_OTHER_NODES
268 depends on NEED_MULTIPLE_NODES
270 config ARCH_POPULATES_NODE_MAP
273 config ARCH_SELECT_MEMORY_MODEL
276 config ARCH_SPARSEMEM_ENABLE
278 select SPARSEMEM_VMEMMAP_ENABLE
280 config ARCH_SPARSEMEM_DEFAULT
288 Find out whether you have ISA slots on your motherboard. ISA is the
289 name of a bus system, i.e. the way the CPU talks to the other stuff
290 inside your box. Other bus systems are PCI, EISA, MicroChannel
291 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
292 newer boards don't support it. If you have ISA, say Y, otherwise N.
297 Say Y here if you would like support for ISA Plug and Play devices.
298 Some information is in <file:Documentation/isapnp.txt>.
300 To compile this driver as a module, choose M here: the
301 module will be called isapnp.
308 The Extended Industry Standard Architecture (EISA) bus was
309 developed as an open alternative to the IBM MicroChannel bus.
311 The EISA bus provided some of the features of the IBM MicroChannel
312 bus while maintaining backward compatibility with cards made for
313 the older ISA bus. The EISA bus saw limited use between 1988 and
314 1995 when it was made obsolete by the PCI bus.
316 Say Y here if you are building a kernel for an EISA-based machine.
323 MicroChannel Architecture is found in some IBM PS/2 machines and
324 laptops. It is a bus system similar to PCI or ISA. See
325 <file:Documentation/mca.txt> (and especially the web page given
326 there) before attempting to build an MCA bus kernel.
331 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
332 computer. These are credit-card size devices such as network cards,
333 modems or hard drives often used with laptops computers. There are
334 actually two varieties of these cards: the older 16 bit PCMCIA cards
335 and the newer 32 bit CardBus cards. If you want to use CardBus
336 cards, you need to say Y here and also to "CardBus support" below.
338 To use your PC-cards, you will need supporting software from David
339 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
340 for location). Please also read the PCMCIA-HOWTO, available from
341 <http://www.tldp.org/docs.html#howto>.
343 To compile this driver as modules, choose M here: the
344 modules will be called pcmcia_core and ds.
363 bool "Sun Logical Domains support"
365 Say Y here is you want to support virtual devices via
370 select ARCH_SUPPORTS_MSI
372 Find out whether you have a PCI motherboard. PCI is the name of a
373 bus system, i.e. the way the CPU talks to the other stuff inside
374 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
375 VESA. If you have PCI, say Y, otherwise N.
383 source "drivers/pci/Kconfig"
385 config SUN_OPENPROMFS
386 tristate "Openprom tree appears in /proc/openprom"
388 If you say Y, the OpenPROM device tree will be available as a
389 virtual file system, which you can mount to /proc/openprom by "mount
390 -t openpromfs none /proc/openprom".
392 To compile the /proc/openprom support as a module, choose M here: the
393 module will be called openpromfs. If unsure, choose M.
395 menu "Executable file formats"
397 source "fs/Kconfig.binfmt"
399 config SPARC32_COMPAT
400 bool "Kernel support for Linux/Sparc 32bit binary compatibility"
402 This allows you to run 32-bit binaries on your Ultra.
403 Everybody wants this; say Y.
407 depends on SPARC32_COMPAT
409 select COMPAT_BINFMT_ELF
411 config SYSVIPC_COMPAT
413 depends on COMPAT && SYSVIPC
419 bool "SMT (Hyperthreading) scheduler support"
423 SMT scheduler support improves the CPU scheduler's decision making
424 when dealing with UltraSPARC cpus at a cost of slightly increased
425 overhead in some places. If unsure say N here.
428 bool "Multi-core scheduler support"
432 Multi-core scheduler support improves the CPU scheduler's decision
433 making when dealing with multi-core CPU chips at a cost of slightly
434 increased overhead in some places. If unsure say N here.
436 source "kernel/Kconfig.preempt"
439 bool "Default bootloader kernel arguments"
442 string "Initial kernel command string"
443 depends on CMDLINE_BOOL
444 default "console=ttyS0,9600 root=/dev/sda1"
446 Say Y here if you want to be able to pass default arguments to
447 the kernel. This will be overridden by the bootloader, if you
448 use one (such as SILO). This is most useful if you want to boot
449 a kernel from TFTP, and want default options to be available
450 with having them passed on the command line.
452 NOTE: This option WILL override the PROM bootargs setting!
456 source "drivers/Kconfig"
458 source "drivers/sbus/char/Kconfig"
462 source "arch/sparc64/Kconfig.debug"
464 source "security/Kconfig"
466 source "crypto/Kconfig"