arch/ppc64/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5
   6 config 64BIT
   7         def_bool y
   8
   9 config MMU
  10         bool
  11         default y
  12
  13 config UID16
  14         bool
  15
  16 config RWSEM_GENERIC_SPINLOCK
  17         bool
  18
  19 config RWSEM_XCHGADD_ALGORITHM
  20         bool
  21         default y
  22
  23 config GENERIC_CALIBRATE_DELAY
  24         bool
  25         default y
  26
  27 config GENERIC_ISA_DMA
  28         bool
  29         default y
  30
  31 config HAVE_DEC_LOCK
  32         bool
  33         default y
  34
  35 config EARLY_PRINTK
  36         bool
  37         default y
  38
  39 config COMPAT
  40         bool
  41         default y
  42
  43 config FRAME_POINTER
  44         bool
  45         default y
  46
  47 # We optimistically allocate largepages from the VM, so make the limit
  48 # large enough (16MB). This badly named config option is actually
  49 # max order + 1
  50 config FORCE_MAX_ZONEORDER
  51         int
  52         default "13"
  53
  54 source "init/Kconfig"
  55
  56 config SYSVIPC_COMPAT
  57         bool
  58         depends on COMPAT && SYSVIPC
  59         default y
  60
  61 menu "Platform support"
  62
  63 choice
  64         prompt "Platform Type"
  65         default PPC_MULTIPLATFORM
  66
  67 config PPC_ISERIES
  68         bool "IBM Legacy iSeries"
  69
  70 config PPC_MULTIPLATFORM
  71         bool "Generic"
  72
  73 endchoice
  74
  75 config PPC_PSERIES
  76         depends on PPC_MULTIPLATFORM
  77         bool "  IBM pSeries & new iSeries"
  78         default y
  79
  80 config PPC_PMAC
  81         depends on PPC_MULTIPLATFORM
  82         bool "  Apple G5 based machines"
  83         default y
  84         select U3_DART
  85
  86 config PPC_MAPLE
  87         depends on PPC_MULTIPLATFORM
  88         bool "  Maple 970FX Evaluation Board"
  89         select U3_DART
  90         select MPIC_BROKEN_U3
  91         default n
  92         help
  93           This option enables support for the Maple 970FX Evaluation Board.
  94           For more informations, refer to <http://www.970eval.com>
  95
  96 config PPC
  97         bool
  98         default y
  99
 100 config PPC64
 101         bool
 102         default y
 103
 104 config PPC_OF
 105         depends on PPC_MULTIPLATFORM
 106         bool
 107         default y
 108
 109 # VMX is pSeries only for now until somebody writes the iSeries
 110 # exception vectors for it
 111 config ALTIVEC
 112         bool "Support for VMX (Altivec) vector unit"
 113         depends on PPC_MULTIPLATFORM
 114         default y
 115
 116 config PPC_SPLPAR
 117         depends on PPC_PSERIES
 118         bool "Support for shared-processor logical partitions"
 119         default n
 120         help
 121           Enabling this option will make the kernel run more efficiently
 122           on logically-partitioned pSeries systems which use shared
 123           processors, that is, which share physical processors between
 124           two or more partitions.
 125
 126 config IBMVIO
 127         depends on PPC_PSERIES || PPC_ISERIES
 128         bool
 129         default y
 130
 131 config U3_DART
 132         bool
 133         depends on PPC_MULTIPLATFORM
 134         default n
 135
 136 config MPIC_BROKEN_U3
 137         bool
 138         depends on PPC_MAPLE
 139         default y
 140
 141 config PPC_PMAC64
 142         bool
 143         depends on PPC_PMAC
 144         default y
 145
 146 config BOOTX_TEXT
 147         bool "Support for early boot text console"
 148         depends PPC_OF
 149         help
 150           Say Y here to see progress messages from the boot firmware in text
 151           mode. Requires an Open Firmware compatible video card.
 152
 153 config POWER4_ONLY
 154         bool "Optimize for POWER4"
 155         default n
 156         ---help---
 157           Cause the compiler to optimize for POWER4 processors. The resulting
 158           binary will not work on POWER3 or RS64 processors when compiled with
 159           binutils 2.15 or later.
 160
 161 config IOMMU_VMERGE
 162         bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
 163         depends on EXPERIMENTAL
 164         default n
 165         help
 166           Cause IO segments sent to a device for DMA to be merged virtually
 167           by the IOMMU when they happen to have been allocated contiguously.
 168           This doesn't add pressure to the IOMMU allocator. However, some
 169           drivers don't support getting large merged segments coming back
 170           from *_map_sg(). Say Y if you know the drivers you are using are
 171           properly handling this case.
 172
 173 config SMP
 174         bool "Symmetric multi-processing support"
 175         ---help---
 176           This enables support for systems with more than one CPU. If you have
 177           a system with only one CPU, say N. If you have a system with more
 178           than one CPU, say Y.
 179
 180           If you say N here, the kernel will run on single and multiprocessor
 181           machines, but will use only one CPU of a multiprocessor machine. If
 182           you say Y here, the kernel will run on single-processor machines.
 183           On a single-processor machine, the kernel will run faster if you say
 184           N here.
 185
 186           If you don't know what to do here, say Y.
 187
 188 config NR_CPUS
 189         int "Maximum number of CPUs (2-128)"
 190         range 2 128
 191         depends on SMP
 192         default "32"
 193
 194 config HMT
 195         bool "Hardware multithreading"
 196         depends on SMP && PPC_PSERIES && BROKEN
 197         help
 198           This option enables hardware multithreading on RS64 cpus.
 199           pSeries systems p620 and p660 have such a cpu type.
 200
 201 config DISCONTIGMEM
 202         bool "Discontiguous Memory Support"
 203         depends on SMP && PPC_PSERIES
 204
 205 config NUMA
 206         bool "NUMA support"
 207         depends on DISCONTIGMEM
 208
 209 config SCHED_SMT
 210         bool "SMT (Hyperthreading) scheduler support"
 211         depends on SMP
 212         default off
 213         help
 214           SMT scheduler support improves the CPU scheduler's decision making
 215           when dealing with POWER5 cpus at a cost of slightly increased
 216           overhead in some places. If unsure say N here.
 217
 218 config PREEMPT
 219         bool "Preemptible Kernel"
 220         help
 221           This option reduces the latency of the kernel when reacting to
 222           real-time or interactive events by allowing a low priority process to
 223           be preempted even if it is in kernel mode executing a system call.
 224
 225           Say Y here if you are building a kernel for a desktop, embedded
 226           or real-time system.  Say N if you are unsure.
 227
 228 config PREEMPT_BKL
 229         bool "Preempt The Big Kernel Lock"
 230         depends on PREEMPT
 231         default y
 232         help
 233           This option reduces the latency of the kernel by making the
 234           big kernel lock preemptible.
 235
 236           Say Y here if you are building a kernel for a desktop system.
 237           Say N if you are unsure.
 238
 239 config EEH
 240         bool "PCI Extended Error Handling (EEH)" if EMBEDDED
 241         depends on PPC_PSERIES
 242         default y if !EMBEDDED
 243
 244 #
 245 # Use the generic interrupt handling code in kernel/irq/:
 246 #
 247 config GENERIC_HARDIRQS
 248         bool
 249         default y
 250
 251 config MSCHUNKS
 252         bool
 253         depends on PPC_ISERIES
 254         default y
 255
 256
 257 config PPC_RTAS
 258         bool
 259         depends on PPC_PSERIES
 260         default y
 261
 262 config RTAS_PROC
 263         bool "Proc interface to RTAS"
 264         depends on PPC_RTAS
 265
 266 config RTAS_FLASH
 267         tristate "Firmware flash interface"
 268         depends on RTAS_PROC
 269
 270 config SCANLOG
 271         tristate "Scanlog dump interface"
 272         depends on RTAS_PROC && PPC_PSERIES
 273
 274 config LPARCFG
 275         tristate "LPAR Configuration Data"
 276         depends on PPC_PSERIES || PPC_ISERIES
 277         help
 278         Provide system capacity information via human readable
 279         <key word>=<value> pairs through a /proc/ppc64/lparcfg interface.
 280
 281 config SECCOMP
 282         bool "Enable seccomp to safely compute untrusted bytecode"
 283         depends on PROC_FS
 284         default y
 285         help
 286           This kernel feature is useful for number crunching applications
 287           that may need to compute untrusted bytecode during their
 288           execution. By using pipes or other transports made available to
 289           the process as file descriptors supporting the read/write
 290           syscalls, it's possible to isolate those applications in
 291           their own address space using seccomp. Once seccomp is
 292           enabled via /proc/<pid>/seccomp, it cannot be disabled
 293           and the task is only allowed to execute a few safe syscalls
 294           defined by each seccomp mode.
 295
 296           If unsure, say Y. Only embedded should say N here.
 297
 298 endmenu
 299
 300
 301 menu "General setup"
 302
 303 config ISA
 304         bool
 305         help
 306           Find out whether you have ISA slots on your motherboard.  ISA is the
 307           name of a bus system, i.e. the way the CPU talks to the other stuff
 308           inside your box.  If you have an Apple machine, say N here; if you
 309           have an IBM RS/6000 or pSeries machine or a PReP machine, say Y.  If
 310           you have an embedded board, consult your board documentation.
 311
 312 config SBUS
 313         bool
 314
 315 config MCA
 316         bool
 317
 318 config EISA
 319         bool
 320
 321 config PCI
 322         bool
 323         default y
 324         help
 325           Find out whether your system includes a PCI bus. PCI is the name of
 326           a bus system, i.e. the way the CPU talks to the other stuff inside
 327           your box.  If you say Y here, the kernel will include drivers and
 328           infrastructure code to support PCI bus devices.
 329
 330 config PCI_DOMAINS
 331         bool
 332         default PCI
 333
 334 source "fs/Kconfig.binfmt"
 335
 336 source "drivers/pci/Kconfig"
 337
 338 config HOTPLUG_CPU
 339         bool "Support for hot-pluggable CPUs"
 340         depends on SMP && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
 341         select HOTPLUG
 342         ---help---
 343           Say Y here to be able to turn CPUs off and on.
 344
 345           Say N if you are unsure.
 346
 347 source "drivers/pcmcia/Kconfig"
 348
 349 source "drivers/pci/hotplug/Kconfig"
 350
 351 config PROC_DEVICETREE
 352         bool "Support for Open Firmware device tree in /proc"
 353         depends on !PPC_ISERIES
 354         help
 355           This option adds a device-tree directory under /proc which contains
 356           an image of the device tree that the kernel copies from Open
 357           Firmware. If unsure, say Y here.
 358
 359 config CMDLINE_BOOL
 360         bool "Default bootloader kernel arguments"
 361         depends on !PPC_ISERIES
 362
 363 config CMDLINE
 364         string "Initial kernel command string"
 365         depends on CMDLINE_BOOL
 366         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 367         help
 368           On some platforms, there is currently no way for the boot loader to
 369           pass arguments to the kernel. For these platforms, you can supply
 370           some command-line options at build time by entering them here.  In
 371           most cases you will need to specify the root device here.
 372
 373 endmenu
 374
 375 source "drivers/Kconfig"
 376
 377 source "fs/Kconfig"
 378
 379 menu "iSeries device drivers"
 380         depends on PPC_ISERIES
 381
 382 config VIOCONS
 383         tristate "iSeries Virtual Console Support"
 384
 385 config VIODASD
 386         tristate "iSeries Virtual I/O disk support"
 387         help
 388           If you are running on an iSeries system and you want to use
 389           virtual disks created and managed by OS/400, say Y.
 390
 391 config VIOCD
 392         tristate "iSeries Virtual I/O CD support"
 393         help
 394           If you are running Linux on an IBM iSeries system and you want to
 395           read a CD drive owned by OS/400, say Y here.
 396
 397 config VIOTAPE
 398         tristate "iSeries Virtual Tape Support"
 399         help
 400           If you are running Linux on an iSeries system and you want Linux
 401           to read and/or write a tape drive owned by OS/400, say Y here.
 402
 403 endmenu
 404
 405 config VIOPATH
 406         bool
 407         depends on VIOCONS || VIODASD || VIOCD || VIOTAPE || VETH
 408         default y
 409
 410 source "arch/ppc64/oprofile/Kconfig"
 411
 412 source "arch/ppc64/Kconfig.debug"
 413
 414 source "security/Kconfig"
 415
 416 config KEYS_COMPAT
 417         bool
 418         depends on COMPAT && KEYS
 419         default y
 420
 421 source "crypto/Kconfig"
 422
 423 source "lib/Kconfig"