arch/powerpc/Kconfig

   1 source "arch/powerpc/platforms/Kconfig.cputype"
   2
   3 config PPC32
   4         bool
   5         default y if !PPC64
   6
   7 config 32BIT
   8         bool
   9         default y if PPC32
  10
  11 config 64BIT
  12         bool
  13         default y if PPC64
  14
  15 config WORD_SIZE
  16         int
  17         default 64 if PPC64
  18         default 32 if !PPC64
  19
  20 config ARCH_PHYS_ADDR_T_64BIT
  21        def_bool PPC64 || PHYS_64BIT
  22
  23 config ARCH_DMA_ADDR_T_64BIT
  24         def_bool ARCH_PHYS_ADDR_T_64BIT
  25
  26 config MMU
  27         bool
  28         default y
  29
  30 config HAVE_SETUP_PER_CPU_AREA
  31         def_bool PPC64
  32
  33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  34         def_bool PPC64
  35
  36 config NR_IRQS
  37         int "Number of virtual interrupt numbers"
  38         range 32 32768
  39         default "512"
  40         help
  41           This defines the number of virtual interrupt numbers the kernel
  42           can manage. Virtual interrupt numbers are what you see in
  43           /proc/interrupts. If you configure your system to have too few,
  44           drivers will fail to load or worse - handle with care.
  45
  46 config STACKTRACE_SUPPORT
  47         bool
  48         default y
  49
  50 config HAVE_LATENCYTOP_SUPPORT
  51         def_bool y
  52
  53 config TRACE_IRQFLAGS_SUPPORT
  54         bool
  55         default y
  56
  57 config LOCKDEP_SUPPORT
  58         bool
  59         default y
  60
  61 config RWSEM_GENERIC_SPINLOCK
  62         bool
  63
  64 config RWSEM_XCHGADD_ALGORITHM
  65         bool
  66         default y
  67
  68 config GENERIC_LOCKBREAK
  69         bool
  70         default y
  71         depends on SMP && PREEMPT
  72
  73 config ARCH_HAS_ILOG2_U32
  74         bool
  75         default y
  76
  77 config ARCH_HAS_ILOG2_U64
  78         bool
  79         default y if 64BIT
  80
  81 config GENERIC_HWEIGHT
  82         bool
  83         default y
  84
  85 config PPC
  86         bool
  87         default y
  88         select ARCH_MIGHT_HAVE_PC_PARPORT
  89         select ARCH_MIGHT_HAVE_PC_SERIO
  90         select BINFMT_ELF
  91         select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  92         select OF
  93         select OF_EARLY_FLATTREE
  94         select OF_RESERVED_MEM
  95         select HAVE_FTRACE_MCOUNT_RECORD
  96         select HAVE_DYNAMIC_FTRACE
  97         select HAVE_FUNCTION_TRACER
  98         select HAVE_FUNCTION_GRAPH_TRACER
  99         select SYSCTL_EXCEPTION_TRACE
 100         select ARCH_WANT_OPTIONAL_GPIOLIB
 101         select VIRT_TO_BUS if !PPC64
 102         select HAVE_IDE
 103         select HAVE_IOREMAP_PROT
 104         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
 105         select HAVE_KPROBES
 106         select HAVE_ARCH_KGDB
 107         select HAVE_KRETPROBES
 108         select HAVE_ARCH_TRACEHOOK
 109         select HAVE_MEMBLOCK
 110         select HAVE_MEMBLOCK_NODE_MAP
 111         select HAVE_DMA_ATTRS
 112         select HAVE_DMA_API_DEBUG
 113         select HAVE_OPROFILE
 114         select HAVE_DEBUG_KMEMLEAK
 115         select ARCH_HAS_SG_CHAIN
 116         select GENERIC_ATOMIC64 if PPC32
 117         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 118         select HAVE_PERF_EVENTS
 119         select HAVE_REGS_AND_STACK_ACCESS_API
 120         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 121         select ARCH_WANT_IPC_PARSE_VERSION
 122         select SPARSE_IRQ
 123         select IRQ_DOMAIN
 124         select GENERIC_IRQ_SHOW
 125         select GENERIC_IRQ_SHOW_LEVEL
 126         select IRQ_FORCED_THREADING
 127         select HAVE_RCU_TABLE_FREE if SMP
 128         select HAVE_SYSCALL_TRACEPOINTS
 129         select HAVE_BPF_JIT if PPC64
 130         select HAVE_ARCH_JUMP_LABEL
 131         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 132         select GENERIC_SMP_IDLE_THREAD
 133         select GENERIC_CMOS_UPDATE
 134         select GENERIC_TIME_VSYSCALL_OLD
 135         select GENERIC_CLOCKEVENTS
 136         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 137         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 138         select GENERIC_STRNCPY_FROM_USER
 139         select GENERIC_STRNLEN_USER
 140         select HAVE_MOD_ARCH_SPECIFIC
 141         select MODULES_USE_ELF_RELA
 142         select CLONE_BACKWARDS
 143         select ARCH_USE_BUILTIN_BSWAP
 144         select OLD_SIGSUSPEND
 145         select OLD_SIGACTION if PPC32
 146         select HAVE_DEBUG_STACKOVERFLOW
 147         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 148         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 149         select HAVE_ARCH_AUDITSYSCALL
 150         select ARCH_SUPPORTS_ATOMIC_RMW
 151         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 152         select NO_BOOTMEM
 153         select HAVE_GENERIC_RCU_GUP
 154
 155 config GENERIC_CSUM
 156         def_bool CPU_LITTLE_ENDIAN
 157
 158 config EARLY_PRINTK
 159         bool
 160         default y
 161
 162 config PANIC_TIMEOUT
 163         int
 164         default 180
 165
 166 config COMPAT
 167         bool
 168         default y if PPC64
 169         select COMPAT_BINFMT_ELF
 170         select ARCH_WANT_OLD_COMPAT_IPC
 171         select COMPAT_OLD_SIGACTION
 172
 173 config SYSVIPC_COMPAT
 174         bool
 175         depends on COMPAT && SYSVIPC
 176         default y
 177
 178 # All PPC32s use generic nvram driver through ppc_md
 179 config GENERIC_NVRAM
 180         bool
 181         default y if PPC32
 182
 183 config SCHED_OMIT_FRAME_POINTER
 184         bool
 185         default y
 186
 187 config ARCH_MAY_HAVE_PC_FDC
 188         bool
 189         default PCI
 190
 191 config PPC_OF
 192         def_bool y
 193
 194 config PPC_UDBG_16550
 195         bool
 196         default n
 197
 198 config GENERIC_TBSYNC
 199         bool
 200         default y if PPC32 && SMP
 201         default n
 202
 203 config AUDIT_ARCH
 204         bool
 205         default y
 206
 207 config GENERIC_BUG
 208         bool
 209         default y
 210         depends on BUG
 211
 212 config SYS_SUPPORTS_APM_EMULATION
 213         default y if PMAC_APM_EMU
 214         bool
 215
 216 config EPAPR_BOOT
 217         bool
 218         help
 219           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 220         default n
 221
 222 config DEFAULT_UIMAGE
 223         bool
 224         help
 225           Used to allow a board to specify it wants a uImage built by default
 226         default n
 227
 228 config ARCH_HIBERNATION_POSSIBLE
 229         bool
 230         default y
 231
 232 config ARCH_SUSPEND_POSSIBLE
 233         def_bool y
 234         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 235                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 236                    || 44x || 40x
 237
 238 config PPC_DCR_NATIVE
 239         bool
 240         default n
 241
 242 config PPC_DCR_MMIO
 243         bool
 244         default n
 245
 246 config PPC_DCR
 247         bool
 248         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 249         default y
 250
 251 config PPC_OF_PLATFORM_PCI
 252         bool
 253         depends on PCI
 254         depends on PPC64 # not supported on 32 bits yet
 255         default n
 256
 257 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 258         def_bool y
 259
 260 config ARCH_SUPPORTS_UPROBES
 261         def_bool y
 262
 263 config PPC_ADV_DEBUG_REGS
 264         bool
 265         depends on 40x || BOOKE
 266         default y
 267
 268 config PPC_ADV_DEBUG_IACS
 269         int
 270         depends on PPC_ADV_DEBUG_REGS
 271         default 4 if 44x
 272         default 2
 273
 274 config PPC_ADV_DEBUG_DACS
 275         int
 276         depends on PPC_ADV_DEBUG_REGS
 277         default 2
 278
 279 config PPC_ADV_DEBUG_DVCS
 280         int
 281         depends on PPC_ADV_DEBUG_REGS
 282         default 2 if 44x
 283         default 0
 284
 285 config PPC_ADV_DEBUG_DAC_RANGE
 286         bool
 287         depends on PPC_ADV_DEBUG_REGS && 44x
 288         default y
 289
 290 config PPC_EMULATE_SSTEP
 291         bool
 292         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 293
 294 config ZONE_DMA32
 295         bool
 296         default y if PPC64
 297
 298 source "init/Kconfig"
 299
 300 source "kernel/Kconfig.freezer"
 301
 302 source "arch/powerpc/sysdev/Kconfig"
 303 source "arch/powerpc/platforms/Kconfig"
 304
 305 menu "Kernel options"
 306
 307 config HIGHMEM
 308         bool "High memory support"
 309         depends on PPC32
 310
 311 source kernel/Kconfig.hz
 312 source kernel/Kconfig.preempt
 313 source "fs/Kconfig.binfmt"
 314
 315 config HUGETLB_PAGE_SIZE_VARIABLE
 316         bool
 317         depends on HUGETLB_PAGE
 318         default y
 319
 320 config MATH_EMULATION
 321         bool "Math emulation"
 322         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 323         ---help---
 324           Some PowerPC chips designed for embedded applications do not have
 325           a floating-point unit and therefore do not implement the
 326           floating-point instructions in the PowerPC instruction set.  If you
 327           say Y here, the kernel will include code to emulate a floating-point
 328           unit, which will allow programs that use floating-point
 329           instructions to run.
 330
 331           This is also useful to emulate missing (optional) instructions
 332           such as fsqrt on cores that do have an FPU but do not implement
 333           them (such as Freescale BookE).
 334
 335 choice
 336         prompt "Math emulation options"
 337         default MATH_EMULATION_FULL
 338         depends on MATH_EMULATION
 339
 340 config  MATH_EMULATION_FULL
 341         bool "Emulate all the floating point instructions"
 342         ---help---
 343           Select this option will enable the kernel to support to emulate
 344           all the floating point instructions. If your SoC doesn't have
 345           a FPU, you should select this.
 346
 347 config MATH_EMULATION_HW_UNIMPLEMENTED
 348         bool "Just emulate the FPU unimplemented instructions"
 349         ---help---
 350           Select this if you know there does have a hardware FPU on your
 351           SoC, but some floating point instructions are not implemented by that.
 352
 353 endchoice
 354
 355 config PPC_TRANSACTIONAL_MEM
 356        bool "Transactional Memory support for POWERPC"
 357        depends on PPC_BOOK3S_64
 358        depends on SMP
 359        select ALTIVEC
 360        select VSX
 361        default n
 362        ---help---
 363          Support user-mode Transactional Memory on POWERPC.
 364
 365 config IOMMU_HELPER
 366         def_bool PPC64
 367
 368 config SWIOTLB
 369         bool "SWIOTLB support"
 370         default n
 371         select IOMMU_HELPER
 372         ---help---
 373           Support for IO bounce buffering for systems without an IOMMU.
 374           This allows us to DMA to the full physical address space on
 375           platforms where the size of a physical address is larger
 376           than the bus address.  Not all platforms support this.
 377
 378 config HOTPLUG_CPU
 379         bool "Support for enabling/disabling CPUs"
 380         depends on SMP && (PPC_PSERIES || \
 381         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
 382         ---help---
 383           Say Y here to be able to disable and re-enable individual
 384           CPUs at runtime on SMP machines.
 385
 386           Say N if you are unsure.
 387
 388 config ARCH_CPU_PROBE_RELEASE
 389         def_bool y
 390         depends on HOTPLUG_CPU
 391
 392 config ARCH_ENABLE_MEMORY_HOTPLUG
 393         def_bool y
 394
 395 config ARCH_HAS_WALK_MEMORY
 396         def_bool y
 397
 398 config ARCH_ENABLE_MEMORY_HOTREMOVE
 399         def_bool y
 400
 401 config PPC64_SUPPORTS_MEMORY_FAILURE
 402         bool "Add support for memory hwpoison"
 403         depends on PPC_BOOK3S_64
 404         default "y" if PPC_POWERNV
 405         select ARCH_SUPPORTS_MEMORY_FAILURE
 406
 407 config KEXEC
 408         bool "kexec system call"
 409         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
 410         help
 411           kexec is a system call that implements the ability to shutdown your
 412           current kernel, and to start another kernel.  It is like a reboot
 413           but it is independent of the system firmware.   And like a reboot
 414           you can start any kernel with it, not just Linux.
 415
 416           The name comes from the similarity to the exec system call.
 417
 418           It is an ongoing process to be certain the hardware in a machine
 419           is properly shutdown, so do not be surprised if this code does not
 420           initially work for you.  As of this writing the exact hardware
 421           interface is strongly in flux, so no good recommendation can be
 422           made.
 423
 424 config CRASH_DUMP
 425         bool "Build a kdump crash kernel"
 426         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 427         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 428         help
 429           Build a kernel suitable for use as a kdump capture kernel.
 430           The same kernel binary can be used as production kernel and dump
 431           capture kernel.
 432
 433 config FA_DUMP
 434         bool "Firmware-assisted dump"
 435         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 436         help
 437           A robust mechanism to get reliable kernel crash dump with
 438           assistance from firmware. This approach does not use kexec,
 439           instead firmware assists in booting the kdump kernel
 440           while preserving memory contents. Firmware-assisted dump
 441           is meant to be a kdump replacement offering robustness and
 442           speed not possible without system firmware assistance.
 443
 444           If unsure, say "N"
 445
 446 config IRQ_ALL_CPUS
 447         bool "Distribute interrupts on all CPUs by default"
 448         depends on SMP
 449         help
 450           This option gives the kernel permission to distribute IRQs across
 451           multiple CPUs.  Saying N here will route all IRQs to the first
 452           CPU.  Generally saying Y is safe, although some problems have been
 453           reported with SMP Power Macintoshes with this option enabled.
 454
 455 config NUMA
 456         bool "NUMA support"
 457         depends on PPC64
 458         default y if SMP && PPC_PSERIES
 459
 460 config NODES_SHIFT
 461         int
 462         default "8" if PPC64
 463         default "4"
 464         depends on NEED_MULTIPLE_NODES
 465
 466 config USE_PERCPU_NUMA_NODE_ID
 467         def_bool y
 468         depends on NUMA
 469
 470 config HAVE_MEMORYLESS_NODES
 471         def_bool y
 472         depends on NUMA
 473
 474 config ARCH_SELECT_MEMORY_MODEL
 475         def_bool y
 476         depends on PPC64
 477
 478 config ARCH_FLATMEM_ENABLE
 479         def_bool y
 480         depends on (PPC64 && !NUMA) || PPC32
 481
 482 config ARCH_SPARSEMEM_ENABLE
 483         def_bool y
 484         depends on PPC64
 485         select SPARSEMEM_VMEMMAP_ENABLE
 486
 487 config ARCH_SPARSEMEM_DEFAULT
 488         def_bool y
 489         depends on (SMP && PPC_PSERIES) || PPC_PS3
 490
 491 config SYS_SUPPORTS_HUGETLBFS
 492         bool
 493
 494 source "mm/Kconfig"
 495
 496 config ARCH_MEMORY_PROBE
 497         def_bool y
 498         depends on MEMORY_HOTPLUG
 499
 500 # Some NUMA nodes have memory ranges that span
 501 # other nodes.  Even though a pfn is valid and
 502 # between a node's start and end pfns, it may not
 503 # reside on that node.  See memmap_init_zone()
 504 # for details.
 505 config NODES_SPAN_OTHER_NODES
 506         def_bool y
 507         depends on NEED_MULTIPLE_NODES
 508
 509 config PPC_HAS_HASH_64K
 510         bool
 511         depends on PPC64
 512         default n
 513
 514 config STDBINUTILS
 515         bool "Using standard binutils settings"
 516         depends on 44x
 517         default y
 518         help
 519           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 520           Note, that kernel will be able to run only those applications,
 521           which had been compiled using binutils later than 2.17.50.0.3 with
 522           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 523           the older binutils, you can patch them with a trivial patch, which
 524           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 525
 526 choice
 527         prompt "Page size"
 528         default PPC_4K_PAGES
 529         help
 530           Select the kernel logical page size. Increasing the page size
 531           will reduce software overhead at each page boundary, allow
 532           hardware prefetch mechanisms to be more effective, and allow
 533           larger dma transfers increasing IO efficiency and reducing
 534           overhead. However the utilization of memory will increase.
 535           For example, each cached file will using a multiple of the
 536           page size to hold its contents and the difference between the
 537           end of file and the end of page is wasted.
 538
 539           Some dedicated systems, such as software raid serving with
 540           accelerated calculations, have shown significant increases.
 541
 542           If you configure a 64 bit kernel for 64k pages but the
 543           processor does not support them, then the kernel will simulate
 544           them with 4k pages, loading them on demand, but with the
 545           reduced software overhead and larger internal fragmentation.
 546           For the 32 bit kernel, a large page option will not be offered
 547           unless it is supported by the configured processor.
 548
 549           If unsure, choose 4K_PAGES.
 550
 551 config PPC_4K_PAGES
 552         bool "4k page size"
 553
 554 config PPC_16K_PAGES
 555         bool "16k page size" if 44x || PPC_8xx
 556
 557 config PPC_64K_PAGES
 558         bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
 559         depends on !PPC_FSL_BOOK3E
 560         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 561
 562 config PPC_256K_PAGES
 563         bool "256k page size" if 44x
 564         depends on !STDBINUTILS
 565         help
 566           Make the page size 256k.
 567
 568           As the ELF standard only requires alignment to support page
 569           sizes up to 64k, you will need to compile all of your user
 570           space applications with a non-standard binutils settings
 571           (see the STDBINUTILS description for details).
 572
 573           Say N unless you know what you are doing.
 574
 575 endchoice
 576
 577 config FORCE_MAX_ZONEORDER
 578         int "Maximum zone order"
 579         range 9 64 if PPC64 && PPC_64K_PAGES
 580         default "9" if PPC64 && PPC_64K_PAGES
 581         range 13 64 if PPC64 && !PPC_64K_PAGES
 582         default "13" if PPC64 && !PPC_64K_PAGES
 583         range 9 64 if PPC32 && PPC_16K_PAGES
 584         default "9" if PPC32 && PPC_16K_PAGES
 585         range 7 64 if PPC32 && PPC_64K_PAGES
 586         default "7" if PPC32 && PPC_64K_PAGES
 587         range 5 64 if PPC32 && PPC_256K_PAGES
 588         default "5" if PPC32 && PPC_256K_PAGES
 589         range 11 64
 590         default "11"
 591         help
 592           The kernel memory allocator divides physically contiguous memory
 593           blocks into "zones", where each zone is a power of two number of
 594           pages.  This option selects the largest power of two that the kernel
 595           keeps in the memory allocator.  If you need to allocate very large
 596           blocks of physically contiguous memory, then you may need to
 597           increase this value.
 598
 599           This config option is actually maximum order plus one. For example,
 600           a value of 11 means that the largest free memory block is 2^10 pages.
 601
 602           The page size is not necessarily 4KB.  For example, on 64-bit
 603           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 604           this in mind when choosing a value for this option.
 605
 606 config PPC_SUBPAGE_PROT
 607         bool "Support setting protections for 4k subpages"
 608         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 609         help
 610           This option adds support for a system call to allow user programs
 611           to set access permissions (read/write, readonly, or no access)
 612           on the 4k subpages of each 64k page.
 613
 614 config PPC_COPRO_BASE
 615         bool
 616         default n
 617
 618 config SCHED_SMT
 619         bool "SMT (Hyperthreading) scheduler support"
 620         depends on PPC64 && SMP
 621         help
 622           SMT scheduler support improves the CPU scheduler's decision making
 623           when dealing with POWER5 cpus at a cost of slightly increased
 624           overhead in some places. If unsure say N here.
 625
 626 config PPC_DENORMALISATION
 627         bool "PowerPC denormalisation exception handling"
 628         depends on PPC_BOOK3S_64
 629         default "y" if PPC_POWERNV
 630         ---help---
 631           Add support for handling denormalisation of single precision
 632           values.  Useful for bare metal only.  If unsure say Y here.
 633
 634 config CMDLINE_BOOL
 635         bool "Default bootloader kernel arguments"
 636
 637 config CMDLINE
 638         string "Initial kernel command string"
 639         depends on CMDLINE_BOOL
 640         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 641         help
 642           On some platforms, there is currently no way for the boot loader to
 643           pass arguments to the kernel. For these platforms, you can supply
 644           some command-line options at build time by entering them here.  In
 645           most cases you will need to specify the root device here.
 646
 647 config CMDLINE_FORCE
 648         bool "Always use the default kernel command string"
 649         depends on CMDLINE_BOOL
 650         help
 651           Always use the default kernel command string, even if the boot
 652           loader passes other arguments to the kernel.
 653           This is useful if you cannot or don't want to change the
 654           command-line options your boot loader passes to the kernel.
 655
 656 config EXTRA_TARGETS
 657         string "Additional default image types"
 658         help
 659           List additional targets to be built by the bootwrapper here (separated
 660           by spaces).  This is useful for targets that depend of device tree
 661           files in the .dts directory.
 662
 663           Targets in this list will be build as part of the default build
 664           target, or when the user does a 'make zImage' or a
 665           'make zImage.initrd'.
 666
 667           If unsure, leave blank
 668
 669 config ARCH_WANTS_FREEZER_CONTROL
 670         def_bool y
 671         depends on ADB_PMU
 672
 673 source kernel/power/Kconfig
 674
 675 config SECCOMP
 676         bool "Enable seccomp to safely compute untrusted bytecode"
 677         depends on PROC_FS
 678         default y
 679         help
 680           This kernel feature is useful for number crunching applications
 681           that may need to compute untrusted bytecode during their
 682           execution. By using pipes or other transports made available to
 683           the process as file descriptors supporting the read/write
 684           syscalls, it's possible to isolate those applications in
 685           their own address space using seccomp. Once seccomp is
 686           enabled via /proc/<pid>/seccomp, it cannot be disabled
 687           and the task is only allowed to execute a few safe syscalls
 688           defined by each seccomp mode.
 689
 690           If unsure, say Y. Only embedded should say N here.
 691
 692 endmenu
 693
 694 config ISA_DMA_API
 695         bool
 696         default PCI
 697
 698 menu "Bus options"
 699
 700 config ISA
 701         bool "Support for ISA-bus hardware"
 702         depends on PPC_CHRP
 703         select PPC_I8259
 704         help
 705           Find out whether you have ISA slots on your motherboard.  ISA is the
 706           name of a bus system, i.e. the way the CPU talks to the other stuff
 707           inside your box.  If you have an Apple machine, say N here; if you
 708           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 709           embedded board, consult your board documentation.
 710
 711 config ZONE_DMA
 712         bool
 713         default y
 714
 715 config NEED_DMA_MAP_STATE
 716         def_bool (PPC64 || NOT_COHERENT_CACHE)
 717
 718 config NEED_SG_DMA_LENGTH
 719         def_bool y
 720
 721 config GENERIC_ISA_DMA
 722         bool
 723         depends on ISA_DMA_API
 724         default y
 725
 726 config PPC_INDIRECT_PCI
 727         bool
 728         depends on PCI
 729         default y if 40x || 44x
 730         default n
 731
 732 config EISA
 733         bool
 734
 735 config SBUS
 736         bool
 737
 738 config FSL_SOC
 739         bool
 740
 741 config FSL_PCI
 742         bool
 743         select PPC_INDIRECT_PCI
 744         select PCI_QUIRKS
 745
 746 config FSL_PMC
 747         bool
 748         default y
 749         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 750         help
 751           Freescale MPC85xx/MPC86xx power management controller support
 752           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 753
 754 config PPC4xx_CPM
 755         bool
 756         default y
 757         depends on SUSPEND && (44x || 40x)
 758         help
 759           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 760           It also enables support for two different idle states (idle-wait
 761           and idle-doze).
 762
 763 config 4xx_SOC
 764         bool
 765
 766 config FSL_LBC
 767         bool "Freescale Local Bus support"
 768         depends on FSL_SOC
 769         help
 770           Enables reporting of errors from the Freescale local bus
 771           controller.  Also contains some common code used by
 772           drivers for specific local bus peripherals.
 773
 774 config FSL_GTM
 775         bool
 776         depends on PPC_83xx || QUICC_ENGINE || CPM2
 777         help
 778           Freescale General-purpose Timers support
 779
 780 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 781 config MCA
 782         bool
 783
 784 # Platforms that what PCI turned unconditionally just do select PCI
 785 # in their config node.  Platforms that want to choose at config
 786 # time should select PPC_PCI_CHOICE
 787 config PPC_PCI_CHOICE
 788         bool
 789
 790 config PCI
 791         bool "PCI support" if PPC_PCI_CHOICE
 792         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 793                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 794         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 795         select GENERIC_PCI_IOMAP
 796         help
 797           Find out whether your system includes a PCI bus. PCI is the name of
 798           a bus system, i.e. the way the CPU talks to the other stuff inside
 799           your box.  If you say Y here, the kernel will include drivers and
 800           infrastructure code to support PCI bus devices.
 801
 802 config PCI_DOMAINS
 803         def_bool PCI
 804
 805 config PCI_SYSCALL
 806         def_bool PCI
 807
 808 config PCI_QSPAN
 809         bool "QSpan PCI"
 810         depends on !4xx && !CPM2 && 8xx
 811         select PPC_I8259
 812         help
 813           Say Y here if you have a system based on a Motorola 8xx-series
 814           embedded processor with a QSPAN PCI interface, otherwise say N.
 815
 816 config PCI_8260
 817         bool
 818         depends on PCI && 8260
 819         select PPC_INDIRECT_PCI
 820         default y
 821
 822 source "drivers/pci/pcie/Kconfig"
 823
 824 source "drivers/pci/Kconfig"
 825
 826 source "drivers/pcmcia/Kconfig"
 827
 828 source "drivers/pci/hotplug/Kconfig"
 829
 830 config HAS_RAPIDIO
 831         bool
 832         default n
 833
 834 config RAPIDIO
 835         tristate "RapidIO support"
 836         depends on HAS_RAPIDIO || PCI
 837         help
 838           If you say Y here, the kernel will include drivers and
 839           infrastructure code to support RapidIO interconnect devices.
 840
 841 config FSL_RIO
 842         bool "Freescale Embedded SRIO Controller support"
 843         depends on RAPIDIO = y && HAS_RAPIDIO
 844         default "n"
 845         ---help---
 846           Include support for RapidIO controller on Freescale embedded
 847           processors (MPC8548, MPC8641, etc).
 848
 849 source "drivers/rapidio/Kconfig"
 850
 851 endmenu
 852
 853 config NONSTATIC_KERNEL
 854         bool
 855         default n
 856
 857 menu "Advanced setup"
 858         depends on PPC32
 859
 860 config ADVANCED_OPTIONS
 861         bool "Prompt for advanced kernel configuration options"
 862         help
 863           This option will enable prompting for a variety of advanced kernel
 864           configuration options.  These options can cause the kernel to not
 865           work if they are set incorrectly, but can be used to optimize certain
 866           aspects of kernel memory management.
 867
 868           Unless you know what you are doing, say N here.
 869
 870 comment "Default settings for advanced configuration options are used"
 871         depends on !ADVANCED_OPTIONS
 872
 873 config LOWMEM_SIZE_BOOL
 874         bool "Set maximum low memory"
 875         depends on ADVANCED_OPTIONS
 876         help
 877           This option allows you to set the maximum amount of memory which
 878           will be used as "low memory", that is, memory which the kernel can
 879           access directly, without having to set up a kernel virtual mapping.
 880           This can be useful in optimizing the layout of kernel virtual
 881           memory.
 882
 883           Say N here unless you know what you are doing.
 884
 885 config LOWMEM_SIZE
 886         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 887         default "0x30000000"
 888
 889 config LOWMEM_CAM_NUM_BOOL
 890         bool "Set number of CAMs to use to map low memory"
 891         depends on ADVANCED_OPTIONS && FSL_BOOKE
 892         help
 893           This option allows you to set the maximum number of CAM slots that
 894           will be used to map low memory.  There are a limited number of slots
 895           available and even more limited number that will fit in the L1 MMU.
 896           However, using more entries will allow mapping more low memory.  This
 897           can be useful in optimizing the layout of kernel virtual memory.
 898
 899           Say N here unless you know what you are doing.
 900
 901 config LOWMEM_CAM_NUM
 902         depends on FSL_BOOKE
 903         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 904         default 3
 905
 906 config DYNAMIC_MEMSTART
 907         bool "Enable page aligned dynamic load address for kernel"
 908         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 909         select NONSTATIC_KERNEL
 910         help
 911           This option enables the kernel to be loaded at any page aligned
 912           physical address. The kernel creates a mapping from KERNELBASE to
 913           the address where the kernel is loaded. The page size here implies
 914           the TLB page size of the mapping for kernel on the particular platform.
 915           Please refer to the init code for finding the TLB page size.
 916
 917           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 918           kernel image, where the only restriction is the page aligned kernel
 919           load address. When this option is enabled, the compile time physical
 920           address CONFIG_PHYSICAL_START is ignored.
 921
 922           This option is overridden by CONFIG_RELOCATABLE
 923
 924 config RELOCATABLE
 925         bool "Build a relocatable kernel"
 926         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 927         select NONSTATIC_KERNEL
 928         help
 929           This builds a kernel image that is capable of running at the
 930           location the kernel is loaded at, without any alignment restrictions.
 931           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 932
 933           One use is for the kexec on panic case where the recovery kernel
 934           must live at a different physical address than the primary
 935           kernel.
 936
 937           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 938           it has been loaded at and the compile time physical addresses
 939           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 940           setting can still be useful to bootwrappers that need to know the
 941           load address of the kernel (eg. u-boot/mkimage).
 942
 943 config RELOCATABLE_PPC32
 944         def_bool y
 945         depends on PPC32 && RELOCATABLE
 946
 947 config PAGE_OFFSET_BOOL
 948         bool "Set custom page offset address"
 949         depends on ADVANCED_OPTIONS
 950         help
 951           This option allows you to set the kernel virtual address at which
 952           the kernel will map low memory.  This can be useful in optimizing
 953           the virtual memory layout of the system.
 954
 955           Say N here unless you know what you are doing.
 956
 957 config PAGE_OFFSET
 958         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 959         default "0xc0000000"
 960
 961 config KERNEL_START_BOOL
 962         bool "Set custom kernel base address"
 963         depends on ADVANCED_OPTIONS
 964         help
 965           This option allows you to set the kernel virtual address at which
 966           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 967           however there are times (like kdump) that one might not want them
 968           to be the same.
 969
 970           Say N here unless you know what you are doing.
 971
 972 config KERNEL_START
 973         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 974         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 975         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
 976         default "0xc0000000"
 977
 978 config PHYSICAL_START_BOOL
 979         bool "Set physical address where the kernel is loaded"
 980         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 981         help
 982           This gives the physical address where the kernel is loaded.
 983
 984           Say N here unless you know what you are doing.
 985
 986 config PHYSICAL_START
 987         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 988         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
 989         default "0x00000000"
 990
 991 config PHYSICAL_ALIGN
 992         hex
 993         default "0x04000000" if FSL_BOOKE
 994         help
 995           This value puts the alignment restrictions on physical address
 996           where kernel is loaded and run from. Kernel is compiled for an
 997           address which meets above alignment restriction.
 998
 999 config TASK_SIZE_BOOL
1000         bool "Set custom user task size"
1001         depends on ADVANCED_OPTIONS
1002         help
1003           This option allows you to set the amount of virtual address space
1004           allocated to user tasks.  This can be useful in optimizing the
1005           virtual memory layout of the system.
1006
1007           Say N here unless you know what you are doing.
1008
1009 config TASK_SIZE
1010         hex "Size of user task space" if TASK_SIZE_BOOL
1011         default "0x80000000" if PPC_8xx
1012         default "0xc0000000"
1013
1014 config CONSISTENT_SIZE_BOOL
1015         bool "Set custom consistent memory pool size"
1016         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1017         help
1018           This option allows you to set the size of the
1019           consistent memory pool.  This pool of virtual memory
1020           is used to make consistent memory allocations.
1021
1022 config CONSISTENT_SIZE
1023         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1024         default "0x00200000" if NOT_COHERENT_CACHE
1025
1026 config PIN_TLB
1027         bool "Pinned Kernel TLBs (860 ONLY)"
1028         depends on ADVANCED_OPTIONS && 8xx
1029 endmenu
1030
1031 if PPC64
1032 config RELOCATABLE
1033         bool "Build a relocatable kernel"
1034         depends on !COMPILE_TEST
1035         select NONSTATIC_KERNEL
1036         help
1037           This builds a kernel image that is capable of running anywhere
1038           in the RMA (real memory area) at any 16k-aligned base address.
1039           The kernel is linked as a position-independent executable (PIE)
1040           and contains dynamic relocations which are processed early
1041           in the bootup process.
1042
1043           One use is for the kexec on panic case where the recovery kernel
1044           must live at a different physical address than the primary
1045           kernel.
1046
1047 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1048 config PAGE_OFFSET
1049         hex
1050         default "0xc000000000000000"
1051 config KERNEL_START
1052         hex
1053         default "0xc000000000000000"
1054 config PHYSICAL_START
1055         hex
1056         default "0x00000000"
1057 endif
1058
1059 config  ARCH_RANDOM
1060         def_bool n
1061
1062 source "net/Kconfig"
1063
1064 source "drivers/Kconfig"
1065
1066 source "fs/Kconfig"
1067
1068 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1069
1070 source "lib/Kconfig"
1071
1072 source "arch/powerpc/Kconfig.debug"
1073
1074 source "security/Kconfig"
1075
1076 config KEYS_COMPAT
1077         bool
1078         depends on COMPAT && KEYS
1079         default y
1080
1081 source "crypto/Kconfig"
1082
1083 config PPC_LIB_RHEAP
1084         bool
1085
1086 source "arch/powerpc/kvm/Kconfig"