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 ARCH_HAS_ELF_RANDOMIZE
  93         select OF
  94         select OF_EARLY_FLATTREE
  95         select OF_RESERVED_MEM
  96         select HAVE_FTRACE_MCOUNT_RECORD
  97         select HAVE_DYNAMIC_FTRACE
  98         select HAVE_FUNCTION_TRACER
  99         select HAVE_FUNCTION_GRAPH_TRACER
 100         select SYSCTL_EXCEPTION_TRACE
 101         select ARCH_WANT_OPTIONAL_GPIOLIB
 102         select VIRT_TO_BUS if !PPC64
 103         select HAVE_IDE
 104         select HAVE_IOREMAP_PROT
 105         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
 106         select HAVE_KPROBES
 107         select HAVE_ARCH_KGDB
 108         select HAVE_KRETPROBES
 109         select HAVE_ARCH_TRACEHOOK
 110         select HAVE_MEMBLOCK
 111         select HAVE_MEMBLOCK_NODE_MAP
 112         select HAVE_DMA_ATTRS
 113         select HAVE_DMA_API_DEBUG
 114         select HAVE_OPROFILE
 115         select HAVE_DEBUG_KMEMLEAK
 116         select ARCH_HAS_SG_CHAIN
 117         select GENERIC_ATOMIC64 if PPC32
 118         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 119         select HAVE_PERF_EVENTS
 120         select HAVE_REGS_AND_STACK_ACCESS_API
 121         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 122         select ARCH_WANT_IPC_PARSE_VERSION
 123         select SPARSE_IRQ
 124         select IRQ_DOMAIN
 125         select GENERIC_IRQ_SHOW
 126         select GENERIC_IRQ_SHOW_LEVEL
 127         select IRQ_FORCED_THREADING
 128         select HAVE_RCU_TABLE_FREE if SMP
 129         select HAVE_SYSCALL_TRACEPOINTS
 130         select HAVE_BPF_JIT if PPC64
 131         select HAVE_ARCH_JUMP_LABEL
 132         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 133         select ARCH_HAS_GCOV_PROFILE_ALL
 134         select GENERIC_SMP_IDLE_THREAD
 135         select GENERIC_CMOS_UPDATE
 136         select GENERIC_TIME_VSYSCALL_OLD
 137         select GENERIC_CLOCKEVENTS
 138         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 139         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 140         select GENERIC_STRNCPY_FROM_USER
 141         select GENERIC_STRNLEN_USER
 142         select HAVE_MOD_ARCH_SPECIFIC
 143         select MODULES_USE_ELF_RELA
 144         select CLONE_BACKWARDS
 145         select ARCH_USE_BUILTIN_BSWAP
 146         select OLD_SIGSUSPEND
 147         select OLD_SIGACTION if PPC32
 148         select HAVE_DEBUG_STACKOVERFLOW
 149         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 150         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 151         select HAVE_ARCH_AUDITSYSCALL
 152         select ARCH_SUPPORTS_ATOMIC_RMW
 153         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 154         select NO_BOOTMEM
 155         select HAVE_GENERIC_RCU_GUP
 156
 157 config GENERIC_CSUM
 158         def_bool CPU_LITTLE_ENDIAN
 159
 160 config EARLY_PRINTK
 161         bool
 162         default y
 163
 164 config PANIC_TIMEOUT
 165         int
 166         default 180
 167
 168 config COMPAT
 169         bool
 170         default y if PPC64
 171         select COMPAT_BINFMT_ELF
 172         select ARCH_WANT_OLD_COMPAT_IPC
 173         select COMPAT_OLD_SIGACTION
 174
 175 config SYSVIPC_COMPAT
 176         bool
 177         depends on COMPAT && SYSVIPC
 178         default y
 179
 180 # All PPC32s use generic nvram driver through ppc_md
 181 config GENERIC_NVRAM
 182         bool
 183         default y if PPC32
 184
 185 config SCHED_OMIT_FRAME_POINTER
 186         bool
 187         default y
 188
 189 config ARCH_MAY_HAVE_PC_FDC
 190         bool
 191         default PCI
 192
 193 config PPC_OF
 194         def_bool y
 195
 196 config PPC_UDBG_16550
 197         bool
 198         default n
 199
 200 config GENERIC_TBSYNC
 201         bool
 202         default y if PPC32 && SMP
 203         default n
 204
 205 config AUDIT_ARCH
 206         bool
 207         default y
 208
 209 config GENERIC_BUG
 210         bool
 211         default y
 212         depends on BUG
 213
 214 config SYS_SUPPORTS_APM_EMULATION
 215         default y if PMAC_APM_EMU
 216         bool
 217
 218 config EPAPR_BOOT
 219         bool
 220         help
 221           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 222         default n
 223
 224 config DEFAULT_UIMAGE
 225         bool
 226         help
 227           Used to allow a board to specify it wants a uImage built by default
 228         default n
 229
 230 config ARCH_HIBERNATION_POSSIBLE
 231         bool
 232         default y
 233
 234 config ARCH_SUSPEND_POSSIBLE
 235         def_bool y
 236         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 237                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 238                    || 44x || 40x
 239
 240 config PPC_DCR_NATIVE
 241         bool
 242         default n
 243
 244 config PPC_DCR_MMIO
 245         bool
 246         default n
 247
 248 config PPC_DCR
 249         bool
 250         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 251         default y
 252
 253 config PPC_OF_PLATFORM_PCI
 254         bool
 255         depends on PCI
 256         depends on PPC64 # not supported on 32 bits yet
 257         default n
 258
 259 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 260         depends on PPC32 || PPC_STD_MMU_64
 261         def_bool y
 262
 263 config ARCH_SUPPORTS_UPROBES
 264         def_bool y
 265
 266 config PPC_ADV_DEBUG_REGS
 267         bool
 268         depends on 40x || BOOKE
 269         default y
 270
 271 config PPC_ADV_DEBUG_IACS
 272         int
 273         depends on PPC_ADV_DEBUG_REGS
 274         default 4 if 44x
 275         default 2
 276
 277 config PPC_ADV_DEBUG_DACS
 278         int
 279         depends on PPC_ADV_DEBUG_REGS
 280         default 2
 281
 282 config PPC_ADV_DEBUG_DVCS
 283         int
 284         depends on PPC_ADV_DEBUG_REGS
 285         default 2 if 44x
 286         default 0
 287
 288 config PPC_ADV_DEBUG_DAC_RANGE
 289         bool
 290         depends on PPC_ADV_DEBUG_REGS && 44x
 291         default y
 292
 293 config PPC_EMULATE_SSTEP
 294         bool
 295         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 296
 297 config ZONE_DMA32
 298         bool
 299         default y if PPC64
 300
 301 config PGTABLE_LEVELS
 302         int
 303         default 2 if !PPC64
 304         default 3 if PPC_64K_PAGES
 305         default 4
 306
 307 source "init/Kconfig"
 308
 309 source "kernel/Kconfig.freezer"
 310
 311 source "arch/powerpc/sysdev/Kconfig"
 312 source "arch/powerpc/platforms/Kconfig"
 313
 314 menu "Kernel options"
 315
 316 config HIGHMEM
 317         bool "High memory support"
 318         depends on PPC32
 319
 320 source kernel/Kconfig.hz
 321 source kernel/Kconfig.preempt
 322 source "fs/Kconfig.binfmt"
 323
 324 config HUGETLB_PAGE_SIZE_VARIABLE
 325         bool
 326         depends on HUGETLB_PAGE
 327         default y
 328
 329 config MATH_EMULATION
 330         bool "Math emulation"
 331         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 332         ---help---
 333           Some PowerPC chips designed for embedded applications do not have
 334           a floating-point unit and therefore do not implement the
 335           floating-point instructions in the PowerPC instruction set.  If you
 336           say Y here, the kernel will include code to emulate a floating-point
 337           unit, which will allow programs that use floating-point
 338           instructions to run.
 339
 340           This is also useful to emulate missing (optional) instructions
 341           such as fsqrt on cores that do have an FPU but do not implement
 342           them (such as Freescale BookE).
 343
 344 choice
 345         prompt "Math emulation options"
 346         default MATH_EMULATION_FULL
 347         depends on MATH_EMULATION
 348
 349 config  MATH_EMULATION_FULL
 350         bool "Emulate all the floating point instructions"
 351         ---help---
 352           Select this option will enable the kernel to support to emulate
 353           all the floating point instructions. If your SoC doesn't have
 354           a FPU, you should select this.
 355
 356 config MATH_EMULATION_HW_UNIMPLEMENTED
 357         bool "Just emulate the FPU unimplemented instructions"
 358         ---help---
 359           Select this if you know there does have a hardware FPU on your
 360           SoC, but some floating point instructions are not implemented by that.
 361
 362 endchoice
 363
 364 config PPC_TRANSACTIONAL_MEM
 365        bool "Transactional Memory support for POWERPC"
 366        depends on PPC_BOOK3S_64
 367        depends on SMP
 368        select ALTIVEC
 369        select VSX
 370        default n
 371        ---help---
 372          Support user-mode Transactional Memory on POWERPC.
 373
 374 config IOMMU_HELPER
 375         def_bool PPC64
 376
 377 config SWIOTLB
 378         bool "SWIOTLB support"
 379         default n
 380         select IOMMU_HELPER
 381         ---help---
 382           Support for IO bounce buffering for systems without an IOMMU.
 383           This allows us to DMA to the full physical address space on
 384           platforms where the size of a physical address is larger
 385           than the bus address.  Not all platforms support this.
 386
 387 config HOTPLUG_CPU
 388         bool "Support for enabling/disabling CPUs"
 389         depends on SMP && (PPC_PSERIES || \
 390         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
 391         ---help---
 392           Say Y here to be able to disable and re-enable individual
 393           CPUs at runtime on SMP machines.
 394
 395           Say N if you are unsure.
 396
 397 config ARCH_CPU_PROBE_RELEASE
 398         def_bool y
 399         depends on HOTPLUG_CPU
 400
 401 config ARCH_ENABLE_MEMORY_HOTPLUG
 402         def_bool y
 403
 404 config ARCH_HAS_WALK_MEMORY
 405         def_bool y
 406
 407 config ARCH_ENABLE_MEMORY_HOTREMOVE
 408         def_bool y
 409
 410 config PPC64_SUPPORTS_MEMORY_FAILURE
 411         bool "Add support for memory hwpoison"
 412         depends on PPC_BOOK3S_64
 413         default "y" if PPC_POWERNV
 414         select ARCH_SUPPORTS_MEMORY_FAILURE
 415
 416 config KEXEC
 417         bool "kexec system call"
 418         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
 419         help
 420           kexec is a system call that implements the ability to shutdown your
 421           current kernel, and to start another kernel.  It is like a reboot
 422           but it is independent of the system firmware.   And like a reboot
 423           you can start any kernel with it, not just Linux.
 424
 425           The name comes from the similarity to the exec system call.
 426
 427           It is an ongoing process to be certain the hardware in a machine
 428           is properly shutdown, so do not be surprised if this code does not
 429           initially work for you.  As of this writing the exact hardware
 430           interface is strongly in flux, so no good recommendation can be
 431           made.
 432
 433 config CRASH_DUMP
 434         bool "Build a kdump crash kernel"
 435         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 436         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 437         help
 438           Build a kernel suitable for use as a kdump capture kernel.
 439           The same kernel binary can be used as production kernel and dump
 440           capture kernel.
 441
 442 config FA_DUMP
 443         bool "Firmware-assisted dump"
 444         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 445         help
 446           A robust mechanism to get reliable kernel crash dump with
 447           assistance from firmware. This approach does not use kexec,
 448           instead firmware assists in booting the kdump kernel
 449           while preserving memory contents. Firmware-assisted dump
 450           is meant to be a kdump replacement offering robustness and
 451           speed not possible without system firmware assistance.
 452
 453           If unsure, say "N"
 454
 455 config IRQ_ALL_CPUS
 456         bool "Distribute interrupts on all CPUs by default"
 457         depends on SMP
 458         help
 459           This option gives the kernel permission to distribute IRQs across
 460           multiple CPUs.  Saying N here will route all IRQs to the first
 461           CPU.  Generally saying Y is safe, although some problems have been
 462           reported with SMP Power Macintoshes with this option enabled.
 463
 464 config NUMA
 465         bool "NUMA support"
 466         depends on PPC64
 467         default y if SMP && PPC_PSERIES
 468
 469 config NODES_SHIFT
 470         int
 471         default "8" if PPC64
 472         default "4"
 473         depends on NEED_MULTIPLE_NODES
 474
 475 config USE_PERCPU_NUMA_NODE_ID
 476         def_bool y
 477         depends on NUMA
 478
 479 config HAVE_MEMORYLESS_NODES
 480         def_bool y
 481         depends on NUMA
 482
 483 config ARCH_SELECT_MEMORY_MODEL
 484         def_bool y
 485         depends on PPC64
 486
 487 config ARCH_FLATMEM_ENABLE
 488         def_bool y
 489         depends on (PPC64 && !NUMA) || PPC32
 490
 491 config ARCH_SPARSEMEM_ENABLE
 492         def_bool y
 493         depends on PPC64
 494         select SPARSEMEM_VMEMMAP_ENABLE
 495
 496 config ARCH_SPARSEMEM_DEFAULT
 497         def_bool y
 498         depends on (SMP && PPC_PSERIES) || PPC_PS3
 499
 500 config SYS_SUPPORTS_HUGETLBFS
 501         bool
 502
 503 source "mm/Kconfig"
 504
 505 config ARCH_MEMORY_PROBE
 506         def_bool y
 507         depends on MEMORY_HOTPLUG
 508
 509 # Some NUMA nodes have memory ranges that span
 510 # other nodes.  Even though a pfn is valid and
 511 # between a node's start and end pfns, it may not
 512 # reside on that node.  See memmap_init_zone()
 513 # for details.
 514 config NODES_SPAN_OTHER_NODES
 515         def_bool y
 516         depends on NEED_MULTIPLE_NODES
 517
 518 config PPC_HAS_HASH_64K
 519         bool
 520         depends on PPC64
 521         default n
 522
 523 config STDBINUTILS
 524         bool "Using standard binutils settings"
 525         depends on 44x
 526         default y
 527         help
 528           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 529           Note, that kernel will be able to run only those applications,
 530           which had been compiled using binutils later than 2.17.50.0.3 with
 531           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 532           the older binutils, you can patch them with a trivial patch, which
 533           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 534
 535 choice
 536         prompt "Page size"
 537         default PPC_4K_PAGES
 538         help
 539           Select the kernel logical page size. Increasing the page size
 540           will reduce software overhead at each page boundary, allow
 541           hardware prefetch mechanisms to be more effective, and allow
 542           larger dma transfers increasing IO efficiency and reducing
 543           overhead. However the utilization of memory will increase.
 544           For example, each cached file will using a multiple of the
 545           page size to hold its contents and the difference between the
 546           end of file and the end of page is wasted.
 547
 548           Some dedicated systems, such as software raid serving with
 549           accelerated calculations, have shown significant increases.
 550
 551           If you configure a 64 bit kernel for 64k pages but the
 552           processor does not support them, then the kernel will simulate
 553           them with 4k pages, loading them on demand, but with the
 554           reduced software overhead and larger internal fragmentation.
 555           For the 32 bit kernel, a large page option will not be offered
 556           unless it is supported by the configured processor.
 557
 558           If unsure, choose 4K_PAGES.
 559
 560 config PPC_4K_PAGES
 561         bool "4k page size"
 562
 563 config PPC_16K_PAGES
 564         bool "16k page size" if 44x || PPC_8xx
 565
 566 config PPC_64K_PAGES
 567         bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
 568         depends on !PPC_FSL_BOOK3E
 569         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 570
 571 config PPC_256K_PAGES
 572         bool "256k page size" if 44x
 573         depends on !STDBINUTILS
 574         help
 575           Make the page size 256k.
 576
 577           As the ELF standard only requires alignment to support page
 578           sizes up to 64k, you will need to compile all of your user
 579           space applications with a non-standard binutils settings
 580           (see the STDBINUTILS description for details).
 581
 582           Say N unless you know what you are doing.
 583
 584 endchoice
 585
 586 config FORCE_MAX_ZONEORDER
 587         int "Maximum zone order"
 588         range 9 64 if PPC64 && PPC_64K_PAGES
 589         default "9" if PPC64 && PPC_64K_PAGES
 590         range 13 64 if PPC64 && !PPC_64K_PAGES
 591         default "13" if PPC64 && !PPC_64K_PAGES
 592         range 9 64 if PPC32 && PPC_16K_PAGES
 593         default "9" if PPC32 && PPC_16K_PAGES
 594         range 7 64 if PPC32 && PPC_64K_PAGES
 595         default "7" if PPC32 && PPC_64K_PAGES
 596         range 5 64 if PPC32 && PPC_256K_PAGES
 597         default "5" if PPC32 && PPC_256K_PAGES
 598         range 11 64
 599         default "11"
 600         help
 601           The kernel memory allocator divides physically contiguous memory
 602           blocks into "zones", where each zone is a power of two number of
 603           pages.  This option selects the largest power of two that the kernel
 604           keeps in the memory allocator.  If you need to allocate very large
 605           blocks of physically contiguous memory, then you may need to
 606           increase this value.
 607
 608           This config option is actually maximum order plus one. For example,
 609           a value of 11 means that the largest free memory block is 2^10 pages.
 610
 611           The page size is not necessarily 4KB.  For example, on 64-bit
 612           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 613           this in mind when choosing a value for this option.
 614
 615 config PPC_SUBPAGE_PROT
 616         bool "Support setting protections for 4k subpages"
 617         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 618         help
 619           This option adds support for a system call to allow user programs
 620           to set access permissions (read/write, readonly, or no access)
 621           on the 4k subpages of each 64k page.
 622
 623 config PPC_COPRO_BASE
 624         bool
 625         default n
 626
 627 config SCHED_SMT
 628         bool "SMT (Hyperthreading) scheduler support"
 629         depends on PPC64 && SMP
 630         help
 631           SMT scheduler support improves the CPU scheduler's decision making
 632           when dealing with POWER5 cpus at a cost of slightly increased
 633           overhead in some places. If unsure say N here.
 634
 635 config PPC_DENORMALISATION
 636         bool "PowerPC denormalisation exception handling"
 637         depends on PPC_BOOK3S_64
 638         default "y" if PPC_POWERNV
 639         ---help---
 640           Add support for handling denormalisation of single precision
 641           values.  Useful for bare metal only.  If unsure say Y here.
 642
 643 config CMDLINE_BOOL
 644         bool "Default bootloader kernel arguments"
 645
 646 config CMDLINE
 647         string "Initial kernel command string"
 648         depends on CMDLINE_BOOL
 649         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 650         help
 651           On some platforms, there is currently no way for the boot loader to
 652           pass arguments to the kernel. For these platforms, you can supply
 653           some command-line options at build time by entering them here.  In
 654           most cases you will need to specify the root device here.
 655
 656 config CMDLINE_FORCE
 657         bool "Always use the default kernel command string"
 658         depends on CMDLINE_BOOL
 659         help
 660           Always use the default kernel command string, even if the boot
 661           loader passes other arguments to the kernel.
 662           This is useful if you cannot or don't want to change the
 663           command-line options your boot loader passes to the kernel.
 664
 665 config EXTRA_TARGETS
 666         string "Additional default image types"
 667         help
 668           List additional targets to be built by the bootwrapper here (separated
 669           by spaces).  This is useful for targets that depend of device tree
 670           files in the .dts directory.
 671
 672           Targets in this list will be build as part of the default build
 673           target, or when the user does a 'make zImage' or a
 674           'make zImage.initrd'.
 675
 676           If unsure, leave blank
 677
 678 config ARCH_WANTS_FREEZER_CONTROL
 679         def_bool y
 680         depends on ADB_PMU
 681
 682 source kernel/power/Kconfig
 683
 684 config SECCOMP
 685         bool "Enable seccomp to safely compute untrusted bytecode"
 686         depends on PROC_FS
 687         default y
 688         help
 689           This kernel feature is useful for number crunching applications
 690           that may need to compute untrusted bytecode during their
 691           execution. By using pipes or other transports made available to
 692           the process as file descriptors supporting the read/write
 693           syscalls, it's possible to isolate those applications in
 694           their own address space using seccomp. Once seccomp is
 695           enabled via /proc/<pid>/seccomp, it cannot be disabled
 696           and the task is only allowed to execute a few safe syscalls
 697           defined by each seccomp mode.
 698
 699           If unsure, say Y. Only embedded should say N here.
 700
 701 endmenu
 702
 703 config ISA_DMA_API
 704         bool
 705         default PCI
 706
 707 menu "Bus options"
 708
 709 config ISA
 710         bool "Support for ISA-bus hardware"
 711         depends on PPC_CHRP
 712         select PPC_I8259
 713         help
 714           Find out whether you have ISA slots on your motherboard.  ISA is the
 715           name of a bus system, i.e. the way the CPU talks to the other stuff
 716           inside your box.  If you have an Apple machine, say N here; if you
 717           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 718           embedded board, consult your board documentation.
 719
 720 config ZONE_DMA
 721         bool
 722         default y
 723
 724 config NEED_DMA_MAP_STATE
 725         def_bool (PPC64 || NOT_COHERENT_CACHE)
 726
 727 config NEED_SG_DMA_LENGTH
 728         def_bool y
 729
 730 config GENERIC_ISA_DMA
 731         bool
 732         depends on ISA_DMA_API
 733         default y
 734
 735 config PPC_INDIRECT_PCI
 736         bool
 737         depends on PCI
 738         default y if 40x || 44x
 739         default n
 740
 741 config EISA
 742         bool
 743
 744 config SBUS
 745         bool
 746
 747 config FSL_SOC
 748         bool
 749
 750 config FSL_PCI
 751         bool
 752         select PPC_INDIRECT_PCI
 753         select PCI_QUIRKS
 754
 755 config FSL_PMC
 756         bool
 757         default y
 758         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 759         help
 760           Freescale MPC85xx/MPC86xx power management controller support
 761           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 762
 763 config PPC4xx_CPM
 764         bool
 765         default y
 766         depends on SUSPEND && (44x || 40x)
 767         help
 768           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 769           It also enables support for two different idle states (idle-wait
 770           and idle-doze).
 771
 772 config 4xx_SOC
 773         bool
 774
 775 config FSL_LBC
 776         bool "Freescale Local Bus support"
 777         depends on FSL_SOC
 778         help
 779           Enables reporting of errors from the Freescale local bus
 780           controller.  Also contains some common code used by
 781           drivers for specific local bus peripherals.
 782
 783 config FSL_GTM
 784         bool
 785         depends on PPC_83xx || QUICC_ENGINE || CPM2
 786         help
 787           Freescale General-purpose Timers support
 788
 789 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 790 config MCA
 791         bool
 792
 793 # Platforms that what PCI turned unconditionally just do select PCI
 794 # in their config node.  Platforms that want to choose at config
 795 # time should select PPC_PCI_CHOICE
 796 config PPC_PCI_CHOICE
 797         bool
 798
 799 config PCI
 800         bool "PCI support" if PPC_PCI_CHOICE
 801         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 802                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 803         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 804         select GENERIC_PCI_IOMAP
 805         help
 806           Find out whether your system includes a PCI bus. PCI is the name of
 807           a bus system, i.e. the way the CPU talks to the other stuff inside
 808           your box.  If you say Y here, the kernel will include drivers and
 809           infrastructure code to support PCI bus devices.
 810
 811 config PCI_DOMAINS
 812         def_bool PCI
 813
 814 config PCI_SYSCALL
 815         def_bool PCI
 816
 817 config PCI_QSPAN
 818         bool "QSpan PCI"
 819         depends on !4xx && !CPM2 && 8xx
 820         select PPC_I8259
 821         help
 822           Say Y here if you have a system based on a Motorola 8xx-series
 823           embedded processor with a QSPAN PCI interface, otherwise say N.
 824
 825 config PCI_8260
 826         bool
 827         depends on PCI && 8260
 828         select PPC_INDIRECT_PCI
 829         default y
 830
 831 source "drivers/pci/pcie/Kconfig"
 832
 833 source "drivers/pci/Kconfig"
 834
 835 source "drivers/pcmcia/Kconfig"
 836
 837 source "drivers/pci/hotplug/Kconfig"
 838
 839 config HAS_RAPIDIO
 840         bool
 841         default n
 842
 843 config RAPIDIO
 844         tristate "RapidIO support"
 845         depends on HAS_RAPIDIO || PCI
 846         help
 847           If you say Y here, the kernel will include drivers and
 848           infrastructure code to support RapidIO interconnect devices.
 849
 850 config FSL_RIO
 851         bool "Freescale Embedded SRIO Controller support"
 852         depends on RAPIDIO = y && HAS_RAPIDIO
 853         default "n"
 854         ---help---
 855           Include support for RapidIO controller on Freescale embedded
 856           processors (MPC8548, MPC8641, etc).
 857
 858 source "drivers/rapidio/Kconfig"
 859
 860 endmenu
 861
 862 config NONSTATIC_KERNEL
 863         bool
 864         default n
 865
 866 menu "Advanced setup"
 867         depends on PPC32
 868
 869 config ADVANCED_OPTIONS
 870         bool "Prompt for advanced kernel configuration options"
 871         help
 872           This option will enable prompting for a variety of advanced kernel
 873           configuration options.  These options can cause the kernel to not
 874           work if they are set incorrectly, but can be used to optimize certain
 875           aspects of kernel memory management.
 876
 877           Unless you know what you are doing, say N here.
 878
 879 comment "Default settings for advanced configuration options are used"
 880         depends on !ADVANCED_OPTIONS
 881
 882 config LOWMEM_SIZE_BOOL
 883         bool "Set maximum low memory"
 884         depends on ADVANCED_OPTIONS
 885         help
 886           This option allows you to set the maximum amount of memory which
 887           will be used as "low memory", that is, memory which the kernel can
 888           access directly, without having to set up a kernel virtual mapping.
 889           This can be useful in optimizing the layout of kernel virtual
 890           memory.
 891
 892           Say N here unless you know what you are doing.
 893
 894 config LOWMEM_SIZE
 895         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 896         default "0x30000000"
 897
 898 config LOWMEM_CAM_NUM_BOOL
 899         bool "Set number of CAMs to use to map low memory"
 900         depends on ADVANCED_OPTIONS && FSL_BOOKE
 901         help
 902           This option allows you to set the maximum number of CAM slots that
 903           will be used to map low memory.  There are a limited number of slots
 904           available and even more limited number that will fit in the L1 MMU.
 905           However, using more entries will allow mapping more low memory.  This
 906           can be useful in optimizing the layout of kernel virtual memory.
 907
 908           Say N here unless you know what you are doing.
 909
 910 config LOWMEM_CAM_NUM
 911         depends on FSL_BOOKE
 912         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 913         default 3
 914
 915 config DYNAMIC_MEMSTART
 916         bool "Enable page aligned dynamic load address for kernel"
 917         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 918         select NONSTATIC_KERNEL
 919         help
 920           This option enables the kernel to be loaded at any page aligned
 921           physical address. The kernel creates a mapping from KERNELBASE to
 922           the address where the kernel is loaded. The page size here implies
 923           the TLB page size of the mapping for kernel on the particular platform.
 924           Please refer to the init code for finding the TLB page size.
 925
 926           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 927           kernel image, where the only restriction is the page aligned kernel
 928           load address. When this option is enabled, the compile time physical
 929           address CONFIG_PHYSICAL_START is ignored.
 930
 931           This option is overridden by CONFIG_RELOCATABLE
 932
 933 config RELOCATABLE
 934         bool "Build a relocatable kernel"
 935         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 936         select NONSTATIC_KERNEL
 937         help
 938           This builds a kernel image that is capable of running at the
 939           location the kernel is loaded at, without any alignment restrictions.
 940           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 941
 942           One use is for the kexec on panic case where the recovery kernel
 943           must live at a different physical address than the primary
 944           kernel.
 945
 946           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 947           it has been loaded at and the compile time physical addresses
 948           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 949           setting can still be useful to bootwrappers that need to know the
 950           load address of the kernel (eg. u-boot/mkimage).
 951
 952 config RELOCATABLE_PPC32
 953         def_bool y
 954         depends on PPC32 && RELOCATABLE
 955
 956 config PAGE_OFFSET_BOOL
 957         bool "Set custom page offset address"
 958         depends on ADVANCED_OPTIONS
 959         help
 960           This option allows you to set the kernel virtual address at which
 961           the kernel will map low memory.  This can be useful in optimizing
 962           the virtual memory layout of the system.
 963
 964           Say N here unless you know what you are doing.
 965
 966 config PAGE_OFFSET
 967         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 968         default "0xc0000000"
 969
 970 config KERNEL_START_BOOL
 971         bool "Set custom kernel base address"
 972         depends on ADVANCED_OPTIONS
 973         help
 974           This option allows you to set the kernel virtual address at which
 975           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 976           however there are times (like kdump) that one might not want them
 977           to be the same.
 978
 979           Say N here unless you know what you are doing.
 980
 981 config KERNEL_START
 982         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 983         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 984         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
 985         default "0xc0000000"
 986
 987 config PHYSICAL_START_BOOL
 988         bool "Set physical address where the kernel is loaded"
 989         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 990         help
 991           This gives the physical address where the kernel is loaded.
 992
 993           Say N here unless you know what you are doing.
 994
 995 config PHYSICAL_START
 996         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 997         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
 998         default "0x00000000"
 999
1000 config PHYSICAL_ALIGN
1001         hex
1002         default "0x04000000" if FSL_BOOKE
1003         help
1004           This value puts the alignment restrictions on physical address
1005           where kernel is loaded and run from. Kernel is compiled for an
1006           address which meets above alignment restriction.
1007
1008 config TASK_SIZE_BOOL
1009         bool "Set custom user task size"
1010         depends on ADVANCED_OPTIONS
1011         help
1012           This option allows you to set the amount of virtual address space
1013           allocated to user tasks.  This can be useful in optimizing the
1014           virtual memory layout of the system.
1015
1016           Say N here unless you know what you are doing.
1017
1018 config TASK_SIZE
1019         hex "Size of user task space" if TASK_SIZE_BOOL
1020         default "0x80000000" if PPC_8xx
1021         default "0xc0000000"
1022
1023 config CONSISTENT_SIZE_BOOL
1024         bool "Set custom consistent memory pool size"
1025         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1026         help
1027           This option allows you to set the size of the
1028           consistent memory pool.  This pool of virtual memory
1029           is used to make consistent memory allocations.
1030
1031 config CONSISTENT_SIZE
1032         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1033         default "0x00200000" if NOT_COHERENT_CACHE
1034
1035 config PIN_TLB
1036         bool "Pinned Kernel TLBs (860 ONLY)"
1037         depends on ADVANCED_OPTIONS && 8xx
1038 endmenu
1039
1040 if PPC64
1041 config RELOCATABLE
1042         bool "Build a relocatable kernel"
1043         depends on !COMPILE_TEST
1044         select NONSTATIC_KERNEL
1045         help
1046           This builds a kernel image that is capable of running anywhere
1047           in the RMA (real memory area) at any 16k-aligned base address.
1048           The kernel is linked as a position-independent executable (PIE)
1049           and contains dynamic relocations which are processed early
1050           in the bootup process.
1051
1052           One use is for the kexec on panic case where the recovery kernel
1053           must live at a different physical address than the primary
1054           kernel.
1055
1056 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1057 config PAGE_OFFSET
1058         hex
1059         default "0xc000000000000000"
1060 config KERNEL_START
1061         hex
1062         default "0xc000000000000000"
1063 config PHYSICAL_START
1064         hex
1065         default "0x00000000"
1066 endif
1067
1068 config  ARCH_RANDOM
1069         def_bool n
1070
1071 source "net/Kconfig"
1072
1073 source "drivers/Kconfig"
1074
1075 source "fs/Kconfig"
1076
1077 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1078
1079 source "lib/Kconfig"
1080
1081 source "arch/powerpc/Kconfig.debug"
1082
1083 source "security/Kconfig"
1084
1085 config KEYS_COMPAT
1086         bool
1087         depends on COMPAT && KEYS
1088         default y
1089
1090 source "crypto/Kconfig"
1091
1092 config PPC_LIB_RHEAP
1093         bool
1094
1095 source "arch/powerpc/kvm/Kconfig"