arch/sparc64/Kconfig

   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.
   4 #
   5
   6 mainmenu "Linux/UltraSPARC Kernel Configuration"
   7
   8 config SPARC
   9         bool
  10         default y
  11
  12 config SPARC64
  13         bool
  14         default y
  15         help
  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/>.
  21
  22 config 64BIT
  23         def_bool y
  24
  25 config MMU
  26         bool
  27         default y
  28
  29 config TIME_INTERPOLATION
  30         bool
  31         default y
  32
  33 config ARCH_MAY_HAVE_PC_FDC
  34         bool
  35         default y
  36
  37 choice
  38         prompt "Kernel page size"
  39         default SPARC64_PAGE_SIZE_8KB
  40
  41 config SPARC64_PAGE_SIZE_8KB
  42         bool "8KB"
  43         help
  44           This lets you select the page size of the kernel.
  45
  46           8KB and 64KB work quite well, since Sparc ELF sections
  47           provide for up to 64KB alignment.
  48
  49           Therefore, 512KB and 4MB are for expert hackers only.
  50
  51           If you don't know what to do, choose 8KB.
  52
  53 config SPARC64_PAGE_SIZE_64KB
  54         bool "64KB"
  55
  56 config SPARC64_PAGE_SIZE_512KB
  57         bool "512KB"
  58
  59 config SPARC64_PAGE_SIZE_4MB
  60         bool "4MB"
  61
  62 endchoice
  63
  64 config SECCOMP
  65         bool "Enable seccomp to safely compute untrusted bytecode"
  66         depends on PROC_FS
  67         default y
  68         help
  69           This kernel feature is useful for number crunching applications
  70           that may need to compute untrusted bytecode during their
  71           execution. By using pipes or other transports made available to
  72           the process as file descriptors supporting the read/write
  73           syscalls, it's possible to isolate those applications in
  74           their own address space using seccomp. Once seccomp is
  75           enabled via /proc/<pid>/seccomp, it cannot be disabled
  76           and the task is only allowed to execute a few safe syscalls
  77           defined by each seccomp mode.
  78
  79           If unsure, say Y. Only embedded should say N here.
  80
  81 source kernel/Kconfig.hz
  82
  83 source "init/Kconfig"
  84
  85 config SYSVIPC_COMPAT
  86         bool
  87         depends on COMPAT && SYSVIPC
  88         default y
  89
  90 config GENERIC_HARDIRQS
  91         bool
  92         default y
  93
  94 menu "General machine setup"
  95
  96 config SMP
  97         bool "Symmetric multi-processing support"
  98         ---help---
  99           This enables support for systems with more than one CPU. If you have
 100           a system with only one CPU, say N. If you have a system with more than
 101           one CPU, say Y.
 102
 103           If you say N here, the kernel will run on single and multiprocessor
 104           machines, but will use only one CPU of a multiprocessor machine. If
 105           you say Y here, the kernel will run on many, but not all,
 106           singleprocessor machines. On a singleprocessor machine, the kernel
 107           will run faster if you say N here.
 108
 109           People using multiprocessor machines who say Y here should also say
 110           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 111           Management" code will be disabled if you say Y here.
 112
 113           See also the <file:Documentation/smp.txt>,
 114           <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
 115           <http://www.tldp.org/docs.html#howto>.
 116
 117           If you don't know what to do here, say N.
 118
 119 config PREEMPT
 120         bool "Preemptible Kernel"
 121         help
 122           This option reduces the latency of the kernel when reacting to
 123           real-time or interactive events by allowing a low priority process to
 124           be preempted even if it is in kernel mode executing a system call.
 125           This allows applications to run more reliably even when the system is
 126           under load.
 127
 128           Say Y here if you are building a kernel for a desktop, embedded
 129           or real-time system.  Say N if you are unsure.
 130
 131 config NR_CPUS
 132         int "Maximum number of CPUs (2-64)"
 133         range 2 64
 134         depends on SMP
 135         default "32"
 136
 137 source "drivers/cpufreq/Kconfig"
 138
 139 config US3_FREQ
 140         tristate "UltraSPARC-III CPU Frequency driver"
 141         depends on CPU_FREQ
 142         select CPU_FREQ_TABLE
 143         help
 144           This adds the CPUFreq driver for UltraSPARC-III processors.
 145
 146           For details, take a look at <file:Documentation/cpu-freq>.
 147
 148           If in doubt, say N.
 149
 150 config US2E_FREQ
 151         tristate "UltraSPARC-IIe CPU Frequency driver"
 152         depends on CPU_FREQ
 153         select CPU_FREQ_TABLE
 154         help
 155           This adds the CPUFreq driver for UltraSPARC-IIe processors.
 156
 157           For details, take a look at <file:Documentation/cpu-freq>.
 158
 159           If in doubt, say N.
 160
 161 # Global things across all Sun machines.
 162 config RWSEM_GENERIC_SPINLOCK
 163         bool
 164
 165 config RWSEM_XCHGADD_ALGORITHM
 166         bool
 167         default y
 168
 169 config GENERIC_FIND_NEXT_BIT
 170         bool
 171         default y
 172
 173 config GENERIC_HWEIGHT
 174         bool
 175         default y if !ULTRA_HAS_POPULATION_COUNT
 176
 177 config GENERIC_CALIBRATE_DELAY
 178         bool
 179         default y
 180
 181 choice
 182         prompt "SPARC64 Huge TLB Page Size"
 183         depends on HUGETLB_PAGE
 184         default HUGETLB_PAGE_SIZE_4MB
 185
 186 config HUGETLB_PAGE_SIZE_4MB
 187         bool "4MB"
 188
 189 config HUGETLB_PAGE_SIZE_512K
 190         depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB
 191         bool "512K"
 192
 193 config HUGETLB_PAGE_SIZE_64K
 194         depends on !SPARC64_PAGE_SIZE_4MB && !SPARC64_PAGE_SIZE_512KB && !SPARC64_PAGE_SIZE_64KB
 195         bool "64K"
 196
 197 endchoice
 198
 199 endmenu
 200
 201 config ARCH_SELECT_MEMORY_MODEL
 202         def_bool y
 203
 204 config ARCH_SPARSEMEM_ENABLE
 205         def_bool y
 206
 207 config ARCH_SPARSEMEM_DEFAULT
 208         def_bool y
 209
 210 config LARGE_ALLOCS
 211         def_bool y
 212
 213 source "mm/Kconfig"
 214
 215 config GENERIC_ISA_DMA
 216         bool
 217         default y
 218
 219 config ISA
 220         bool
 221         help
 222           Find out whether you have ISA slots on your motherboard.  ISA is the
 223           name of a bus system, i.e. the way the CPU talks to the other stuff
 224           inside your box.  Other bus systems are PCI, EISA, MicroChannel
 225           (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 226           newer boards don't support it.  If you have ISA, say Y, otherwise N.
 227
 228 config ISAPNP
 229         bool
 230         help
 231           Say Y here if you would like support for ISA Plug and Play devices.
 232           Some information is in <file:Documentation/isapnp.txt>.
 233
 234           To compile this driver as a module, choose M here: the
 235           module will be called isapnp.
 236
 237           If unsure, say Y.
 238
 239 config EISA
 240         bool
 241         ---help---
 242           The Extended Industry Standard Architecture (EISA) bus was
 243           developed as an open alternative to the IBM MicroChannel bus.
 244
 245           The EISA bus provided some of the features of the IBM MicroChannel
 246           bus while maintaining backward compatibility with cards made for
 247           the older ISA bus.  The EISA bus saw limited use between 1988 and
 248           1995 when it was made obsolete by the PCI bus.
 249
 250           Say Y here if you are building a kernel for an EISA-based machine.
 251
 252           Otherwise, say N.
 253
 254 config MCA
 255         bool
 256         help
 257           MicroChannel Architecture is found in some IBM PS/2 machines and
 258           laptops.  It is a bus system similar to PCI or ISA. See
 259           <file:Documentation/mca.txt> (and especially the web page given
 260           there) before attempting to build an MCA bus kernel.
 261
 262 config PCMCIA
 263         tristate
 264         ---help---
 265           Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
 266           computer.  These are credit-card size devices such as network cards,
 267           modems or hard drives often used with laptops computers.  There are
 268           actually two varieties of these cards: the older 16 bit PCMCIA cards
 269           and the newer 32 bit CardBus cards.  If you want to use CardBus
 270           cards, you need to say Y here and also to "CardBus support" below.
 271
 272           To use your PC-cards, you will need supporting software from David
 273           Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
 274           for location).  Please also read the PCMCIA-HOWTO, available from
 275           <http://www.tldp.org/docs.html#howto>.
 276
 277           To compile this driver as modules, choose M here: the
 278           modules will be called pcmcia_core and ds.
 279
 280 config SBUS
 281         bool
 282         default y
 283
 284 config SBUSCHAR
 285         bool
 286         default y
 287
 288 config SUN_AUXIO
 289         bool
 290         default y
 291
 292 config SUN_IO
 293         bool
 294         default y
 295
 296 config PCI
 297         bool "PCI support"
 298         help
 299           Find out whether you have a PCI motherboard. PCI is the name of a
 300           bus system, i.e. the way the CPU talks to the other stuff inside
 301           your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
 302           VESA. If you have PCI, say Y, otherwise N.
 303
 304           The PCI-HOWTO, available from
 305           <http://www.tldp.org/docs.html#howto>, contains valuable
 306           information about which PCI hardware does work under Linux and which
 307           doesn't.
 308
 309 config PCI_DOMAINS
 310         bool
 311         default PCI
 312
 313 source "drivers/pci/Kconfig"
 314
 315 config SUN_OPENPROMFS
 316         tristate "Openprom tree appears in /proc/openprom"
 317         help
 318           If you say Y, the OpenPROM device tree will be available as a
 319           virtual file system, which you can mount to /proc/openprom by "mount
 320           -t openpromfs none /proc/openprom".
 321
 322           To compile the /proc/openprom support as a module, choose M here: the
 323           module will be called openpromfs.  If unsure, choose M.
 324
 325 config SPARC32_COMPAT
 326         bool "Kernel support for Linux/Sparc 32bit binary compatibility"
 327         help
 328           This allows you to run 32-bit binaries on your Ultra.
 329           Everybody wants this; say Y.
 330
 331 config COMPAT
 332         bool
 333         depends on SPARC32_COMPAT
 334         default y
 335
 336 config BINFMT_ELF32
 337         bool "Kernel support for 32-bit ELF binaries"
 338         depends on SPARC32_COMPAT
 339         help
 340           This allows you to run 32-bit Linux/ELF binaries on your Ultra.
 341           Everybody wants this; say Y.
 342
 343 config BINFMT_AOUT32
 344         bool "Kernel support for 32-bit (ie. SunOS) a.out binaries"
 345         depends on SPARC32_COMPAT
 346         help
 347           This allows you to run 32-bit a.out format binaries on your Ultra.
 348           If you want to run SunOS binaries (see SunOS binary emulation below)
 349           or other a.out binaries, say Y. If unsure, say N.
 350
 351 menu "Executable file formats"
 352
 353 source "fs/Kconfig.binfmt"
 354
 355 config SUNOS_EMUL
 356         bool "SunOS binary emulation"
 357         depends on BINFMT_AOUT32
 358         help
 359           This allows you to run most SunOS binaries.  If you want to do this,
 360           say Y here and place appropriate files in /usr/gnemul/sunos. See
 361           <http://www.ultralinux.org/faq.html> for more information.  If you
 362           want to run SunOS binaries on an Ultra you must also say Y to
 363           "Kernel support for 32-bit a.out binaries" above.
 364
 365 config SOLARIS_EMUL
 366         tristate "Solaris binary emulation (EXPERIMENTAL)"
 367         depends on SPARC32_COMPAT && EXPERIMENTAL
 368         help
 369           This is experimental code which will enable you to run (many)
 370           Solaris binaries on your SPARC Linux machine.
 371
 372           To compile this code as a module, choose M here: the
 373           module will be called solaris.
 374
 375 endmenu
 376
 377 config SCHED_SMT
 378         bool "SMT (Hyperthreading) scheduler support"
 379         depends on SMP
 380         default y
 381         help
 382           SMT scheduler support improves the CPU scheduler's decision making
 383           when dealing with UltraSPARC cpus at a cost of slightly increased
 384           overhead in some places. If unsure say N here.
 385
 386 config CMDLINE_BOOL
 387         bool "Default bootloader kernel arguments"
 388
 389 config CMDLINE
 390         string "Initial kernel command string"
 391         depends on CMDLINE_BOOL
 392         default "console=ttyS0,9600 root=/dev/sda1"
 393         help
 394           Say Y here if you want to be able to pass default arguments to
 395           the kernel. This will be overridden by the bootloader, if you
 396           use one (such as SILO). This is most useful if you want to boot
 397           a kernel from TFTP, and want default options to be available
 398           with having them passed on the command line.
 399
 400           NOTE: This option WILL override the PROM bootargs setting!
 401
 402 source "net/Kconfig"
 403
 404 source "drivers/Kconfig"
 405
 406 source "drivers/sbus/char/Kconfig"
 407
 408 source "drivers/fc4/Kconfig"
 409
 410 source "fs/Kconfig"
 411
 412 menu "Instrumentation Support"
 413         depends on EXPERIMENTAL
 414
 415 source "arch/sparc64/oprofile/Kconfig"
 416
 417 config KPROBES
 418         bool "Kprobes (EXPERIMENTAL)"
 419         depends on EXPERIMENTAL && MODULES
 420         help
 421           Kprobes allows you to trap at almost any kernel address and
 422           execute a callback function.  register_kprobe() establishes
 423           a probepoint and specifies the callback.  Kprobes is useful
 424           for kernel debugging, non-intrusive instrumentation and testing.
 425           If in doubt, say "N".
 426 endmenu
 427
 428 source "arch/sparc64/Kconfig.debug"
 429
 430 source "security/Kconfig"
 431
 432 source "crypto/Kconfig"
 433
 434 source "lib/Kconfig"