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_HAS_ELF_RANDOMIZE
  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
 130         select HAVE_ARCH_JUMP_LABEL
 131         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 132         select ARCH_HAS_GCOV_PROFILE_ALL
 133         select GENERIC_SMP_IDLE_THREAD
 134         select GENERIC_CMOS_UPDATE
 135         select GENERIC_TIME_VSYSCALL_OLD
 136         select GENERIC_CLOCKEVENTS
 137         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 138         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 139         select GENERIC_STRNCPY_FROM_USER
 140         select GENERIC_STRNLEN_USER
 141         select HAVE_MOD_ARCH_SPECIFIC
 142         select MODULES_USE_ELF_RELA
 143         select CLONE_BACKWARDS
 144         select ARCH_USE_BUILTIN_BSWAP
 145         select OLD_SIGSUSPEND
 146         select OLD_SIGACTION if PPC32
 147         select HAVE_DEBUG_STACKOVERFLOW
 148         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 149         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 150         select HAVE_ARCH_AUDITSYSCALL
 151         select ARCH_SUPPORTS_ATOMIC_RMW
 152         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 153         select NO_BOOTMEM
 154         select HAVE_GENERIC_RCU_GUP
 155         select HAVE_PERF_EVENTS_NMI if PPC64
 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_UDBG_16550
 194         bool
 195         default n
 196
 197 config GENERIC_TBSYNC
 198         bool
 199         default y if PPC32 && SMP
 200         default n
 201
 202 config AUDIT_ARCH
 203         bool
 204         default y
 205
 206 config GENERIC_BUG
 207         bool
 208         default y
 209         depends on BUG
 210
 211 config SYS_SUPPORTS_APM_EMULATION
 212         default y if PMAC_APM_EMU
 213         bool
 214
 215 config EPAPR_BOOT
 216         bool
 217         help
 218           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 219         default n
 220
 221 config DEFAULT_UIMAGE
 222         bool
 223         help
 224           Used to allow a board to specify it wants a uImage built by default
 225         default n
 226
 227 config ARCH_HIBERNATION_POSSIBLE
 228         bool
 229         default y
 230
 231 config ARCH_SUSPEND_POSSIBLE
 232         def_bool y
 233         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 234                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 235                    || 44x || 40x
 236
 237 config PPC_DCR_NATIVE
 238         bool
 239         default n
 240
 241 config PPC_DCR_MMIO
 242         bool
 243         default n
 244
 245 config PPC_DCR
 246         bool
 247         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 248         default y
 249
 250 config PPC_OF_PLATFORM_PCI
 251         bool
 252         depends on PCI
 253         depends on PPC64 # not supported on 32 bits yet
 254         default n
 255
 256 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 257         depends on PPC32 || PPC_STD_MMU_64
 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 config PGTABLE_LEVELS
 299         int
 300         default 2 if !PPC64
 301         default 3 if PPC_64K_PAGES
 302         default 4
 303
 304 source "init/Kconfig"
 305
 306 source "kernel/Kconfig.freezer"
 307
 308 source "arch/powerpc/sysdev/Kconfig"
 309 source "arch/powerpc/platforms/Kconfig"
 310
 311 menu "Kernel options"
 312
 313 config HIGHMEM
 314         bool "High memory support"
 315         depends on PPC32
 316
 317 source kernel/Kconfig.hz
 318 source kernel/Kconfig.preempt
 319 source "fs/Kconfig.binfmt"
 320
 321 config HUGETLB_PAGE_SIZE_VARIABLE
 322         bool
 323         depends on HUGETLB_PAGE
 324         default y
 325
 326 config MATH_EMULATION
 327         bool "Math emulation"
 328         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 329         ---help---
 330           Some PowerPC chips designed for embedded applications do not have
 331           a floating-point unit and therefore do not implement the
 332           floating-point instructions in the PowerPC instruction set.  If you
 333           say Y here, the kernel will include code to emulate a floating-point
 334           unit, which will allow programs that use floating-point
 335           instructions to run.
 336
 337           This is also useful to emulate missing (optional) instructions
 338           such as fsqrt on cores that do have an FPU but do not implement
 339           them (such as Freescale BookE).
 340
 341 choice
 342         prompt "Math emulation options"
 343         default MATH_EMULATION_FULL
 344         depends on MATH_EMULATION
 345
 346 config  MATH_EMULATION_FULL
 347         bool "Emulate all the floating point instructions"
 348         ---help---
 349           Select this option will enable the kernel to support to emulate
 350           all the floating point instructions. If your SoC doesn't have
 351           a FPU, you should select this.
 352
 353 config MATH_EMULATION_HW_UNIMPLEMENTED
 354         bool "Just emulate the FPU unimplemented instructions"
 355         ---help---
 356           Select this if you know there does have a hardware FPU on your
 357           SoC, but some floating point instructions are not implemented by that.
 358
 359 endchoice
 360
 361 config PPC_TRANSACTIONAL_MEM
 362        bool "Transactional Memory support for POWERPC"
 363        depends on PPC_BOOK3S_64
 364        depends on SMP
 365        select ALTIVEC
 366        select VSX
 367        default n
 368        ---help---
 369          Support user-mode Transactional Memory on POWERPC.
 370
 371 config IOMMU_HELPER
 372         def_bool PPC64
 373
 374 config SWIOTLB
 375         bool "SWIOTLB support"
 376         default n
 377         select IOMMU_HELPER
 378         ---help---
 379           Support for IO bounce buffering for systems without an IOMMU.
 380           This allows us to DMA to the full physical address space on
 381           platforms where the size of a physical address is larger
 382           than the bus address.  Not all platforms support this.
 383
 384 config HOTPLUG_CPU
 385         bool "Support for enabling/disabling CPUs"
 386         depends on SMP && (PPC_PSERIES || \
 387         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
 388         ---help---
 389           Say Y here to be able to disable and re-enable individual
 390           CPUs at runtime on SMP machines.
 391
 392           Say N if you are unsure.
 393
 394 config ARCH_CPU_PROBE_RELEASE
 395         def_bool y
 396         depends on HOTPLUG_CPU
 397
 398 config ARCH_ENABLE_MEMORY_HOTPLUG
 399         def_bool y
 400
 401 config ARCH_HAS_WALK_MEMORY
 402         def_bool y
 403
 404 config ARCH_ENABLE_MEMORY_HOTREMOVE
 405         def_bool y
 406
 407 config PPC64_SUPPORTS_MEMORY_FAILURE
 408         bool "Add support for memory hwpoison"
 409         depends on PPC_BOOK3S_64
 410         default "y" if PPC_POWERNV
 411         select ARCH_SUPPORTS_MEMORY_FAILURE
 412
 413 config KEXEC
 414         bool "kexec system call"
 415         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
 416         help
 417           kexec is a system call that implements the ability to shutdown your
 418           current kernel, and to start another kernel.  It is like a reboot
 419           but it is independent of the system firmware.   And like a reboot
 420           you can start any kernel with it, not just Linux.
 421
 422           The name comes from the similarity to the exec system call.
 423
 424           It is an ongoing process to be certain the hardware in a machine
 425           is properly shutdown, so do not be surprised if this code does not
 426           initially work for you.  As of this writing the exact hardware
 427           interface is strongly in flux, so no good recommendation can be
 428           made.
 429
 430 config CRASH_DUMP
 431         bool "Build a kdump crash kernel"
 432         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 433         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 434         help
 435           Build a kernel suitable for use as a kdump capture kernel.
 436           The same kernel binary can be used as production kernel and dump
 437           capture kernel.
 438
 439 config FA_DUMP
 440         bool "Firmware-assisted dump"
 441         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 442         help
 443           A robust mechanism to get reliable kernel crash dump with
 444           assistance from firmware. This approach does not use kexec,
 445           instead firmware assists in booting the kdump kernel
 446           while preserving memory contents. Firmware-assisted dump
 447           is meant to be a kdump replacement offering robustness and
 448           speed not possible without system firmware assistance.
 449
 450           If unsure, say "N"
 451
 452 config IRQ_ALL_CPUS
 453         bool "Distribute interrupts on all CPUs by default"
 454         depends on SMP
 455         help
 456           This option gives the kernel permission to distribute IRQs across
 457           multiple CPUs.  Saying N here will route all IRQs to the first
 458           CPU.  Generally saying Y is safe, although some problems have been
 459           reported with SMP Power Macintoshes with this option enabled.
 460
 461 config NUMA
 462         bool "NUMA support"
 463         depends on PPC64
 464         default y if SMP && PPC_PSERIES
 465
 466 config NODES_SHIFT
 467         int
 468         default "8" if PPC64
 469         default "4"
 470         depends on NEED_MULTIPLE_NODES
 471
 472 config USE_PERCPU_NUMA_NODE_ID
 473         def_bool y
 474         depends on NUMA
 475
 476 config HAVE_MEMORYLESS_NODES
 477         def_bool y
 478         depends on NUMA
 479
 480 config ARCH_SELECT_MEMORY_MODEL
 481         def_bool y
 482         depends on PPC64
 483
 484 config ARCH_FLATMEM_ENABLE
 485         def_bool y
 486         depends on (PPC64 && !NUMA) || PPC32
 487
 488 config ARCH_SPARSEMEM_ENABLE
 489         def_bool y
 490         depends on PPC64
 491         select SPARSEMEM_VMEMMAP_ENABLE
 492
 493 config ARCH_SPARSEMEM_DEFAULT
 494         def_bool y
 495         depends on (SMP && PPC_PSERIES) || PPC_PS3
 496
 497 config SYS_SUPPORTS_HUGETLBFS
 498         bool
 499
 500 source "mm/Kconfig"
 501
 502 config ARCH_MEMORY_PROBE
 503         def_bool y
 504         depends on MEMORY_HOTPLUG
 505
 506 # Some NUMA nodes have memory ranges that span
 507 # other nodes.  Even though a pfn is valid and
 508 # between a node's start and end pfns, it may not
 509 # reside on that node.  See memmap_init_zone()
 510 # for details.
 511 config NODES_SPAN_OTHER_NODES
 512         def_bool y
 513         depends on NEED_MULTIPLE_NODES
 514
 515 config PPC_HAS_HASH_64K
 516         bool
 517         depends on PPC64
 518         default n
 519
 520 config STDBINUTILS
 521         bool "Using standard binutils settings"
 522         depends on 44x
 523         default y
 524         help
 525           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 526           Note, that kernel will be able to run only those applications,
 527           which had been compiled using binutils later than 2.17.50.0.3 with
 528           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 529           the older binutils, you can patch them with a trivial patch, which
 530           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 531
 532 choice
 533         prompt "Page size"
 534         default PPC_4K_PAGES
 535         help
 536           Select the kernel logical page size. Increasing the page size
 537           will reduce software overhead at each page boundary, allow
 538           hardware prefetch mechanisms to be more effective, and allow
 539           larger dma transfers increasing IO efficiency and reducing
 540           overhead. However the utilization of memory will increase.
 541           For example, each cached file will using a multiple of the
 542           page size to hold its contents and the difference between the
 543           end of file and the end of page is wasted.
 544
 545           Some dedicated systems, such as software raid serving with
 546           accelerated calculations, have shown significant increases.
 547
 548           If you configure a 64 bit kernel for 64k pages but the
 549           processor does not support them, then the kernel will simulate
 550           them with 4k pages, loading them on demand, but with the
 551           reduced software overhead and larger internal fragmentation.
 552           For the 32 bit kernel, a large page option will not be offered
 553           unless it is supported by the configured processor.
 554
 555           If unsure, choose 4K_PAGES.
 556
 557 config PPC_4K_PAGES
 558         bool "4k page size"
 559
 560 config PPC_16K_PAGES
 561         bool "16k page size" if 44x || PPC_8xx
 562
 563 config PPC_64K_PAGES
 564         bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
 565         depends on !PPC_FSL_BOOK3E
 566         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 567
 568 config PPC_256K_PAGES
 569         bool "256k page size" if 44x
 570         depends on !STDBINUTILS
 571         help
 572           Make the page size 256k.
 573
 574           As the ELF standard only requires alignment to support page
 575           sizes up to 64k, you will need to compile all of your user
 576           space applications with a non-standard binutils settings
 577           (see the STDBINUTILS description for details).
 578
 579           Say N unless you know what you are doing.
 580
 581 endchoice
 582
 583 config FORCE_MAX_ZONEORDER
 584         int "Maximum zone order"
 585         range 9 64 if PPC64 && PPC_64K_PAGES
 586         default "9" if PPC64 && PPC_64K_PAGES
 587         range 13 64 if PPC64 && !PPC_64K_PAGES
 588         default "13" if PPC64 && !PPC_64K_PAGES
 589         range 9 64 if PPC32 && PPC_16K_PAGES
 590         default "9" if PPC32 && PPC_16K_PAGES
 591         range 7 64 if PPC32 && PPC_64K_PAGES
 592         default "7" if PPC32 && PPC_64K_PAGES
 593         range 5 64 if PPC32 && PPC_256K_PAGES
 594         default "5" if PPC32 && PPC_256K_PAGES
 595         range 11 64
 596         default "11"
 597         help
 598           The kernel memory allocator divides physically contiguous memory
 599           blocks into "zones", where each zone is a power of two number of
 600           pages.  This option selects the largest power of two that the kernel
 601           keeps in the memory allocator.  If you need to allocate very large
 602           blocks of physically contiguous memory, then you may need to
 603           increase this value.
 604
 605           This config option is actually maximum order plus one. For example,
 606           a value of 11 means that the largest free memory block is 2^10 pages.
 607
 608           The page size is not necessarily 4KB.  For example, on 64-bit
 609           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 610           this in mind when choosing a value for this option.
 611
 612 config PPC_SUBPAGE_PROT
 613         bool "Support setting protections for 4k subpages"
 614         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 615         help
 616           This option adds support for a system call to allow user programs
 617           to set access permissions (read/write, readonly, or no access)
 618           on the 4k subpages of each 64k page.
 619
 620 config PPC_COPRO_BASE
 621         bool
 622         default n
 623
 624 config SCHED_SMT
 625         bool "SMT (Hyperthreading) scheduler support"
 626         depends on PPC64 && SMP
 627         help
 628           SMT scheduler support improves the CPU scheduler's decision making
 629           when dealing with POWER5 cpus at a cost of slightly increased
 630           overhead in some places. If unsure say N here.
 631
 632 config PPC_DENORMALISATION
 633         bool "PowerPC denormalisation exception handling"
 634         depends on PPC_BOOK3S_64
 635         default "y" if PPC_POWERNV
 636         ---help---
 637           Add support for handling denormalisation of single precision
 638           values.  Useful for bare metal only.  If unsure say Y here.
 639
 640 config CMDLINE_BOOL
 641         bool "Default bootloader kernel arguments"
 642
 643 config CMDLINE
 644         string "Initial kernel command string"
 645         depends on CMDLINE_BOOL
 646         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 647         help
 648           On some platforms, there is currently no way for the boot loader to
 649           pass arguments to the kernel. For these platforms, you can supply
 650           some command-line options at build time by entering them here.  In
 651           most cases you will need to specify the root device here.
 652
 653 config CMDLINE_FORCE
 654         bool "Always use the default kernel command string"
 655         depends on CMDLINE_BOOL
 656         help
 657           Always use the default kernel command string, even if the boot
 658           loader passes other arguments to the kernel.
 659           This is useful if you cannot or don't want to change the
 660           command-line options your boot loader passes to the kernel.
 661
 662 config EXTRA_TARGETS
 663         string "Additional default image types"
 664         help
 665           List additional targets to be built by the bootwrapper here (separated
 666           by spaces).  This is useful for targets that depend of device tree
 667           files in the .dts directory.
 668
 669           Targets in this list will be build as part of the default build
 670           target, or when the user does a 'make zImage' or a
 671           'make zImage.initrd'.
 672
 673           If unsure, leave blank
 674
 675 config ARCH_WANTS_FREEZER_CONTROL
 676         def_bool y
 677         depends on ADB_PMU
 678
 679 source kernel/power/Kconfig
 680
 681 config SECCOMP
 682         bool "Enable seccomp to safely compute untrusted bytecode"
 683         depends on PROC_FS
 684         default y
 685         help
 686           This kernel feature is useful for number crunching applications
 687           that may need to compute untrusted bytecode during their
 688           execution. By using pipes or other transports made available to
 689           the process as file descriptors supporting the read/write
 690           syscalls, it's possible to isolate those applications in
 691           their own address space using seccomp. Once seccomp is
 692           enabled via /proc/<pid>/seccomp, it cannot be disabled
 693           and the task is only allowed to execute a few safe syscalls
 694           defined by each seccomp mode.
 695
 696           If unsure, say Y. Only embedded should say N here.
 697
 698 endmenu
 699
 700 config ISA_DMA_API
 701         bool
 702         default PCI
 703
 704 menu "Bus options"
 705
 706 config ISA
 707         bool "Support for ISA-bus hardware"
 708         depends on PPC_CHRP
 709         select PPC_I8259
 710         help
 711           Find out whether you have ISA slots on your motherboard.  ISA is the
 712           name of a bus system, i.e. the way the CPU talks to the other stuff
 713           inside your box.  If you have an Apple machine, say N here; if you
 714           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 715           embedded board, consult your board documentation.
 716
 717 config ZONE_DMA
 718         bool
 719         default y
 720
 721 config NEED_DMA_MAP_STATE
 722         def_bool (PPC64 || NOT_COHERENT_CACHE)
 723
 724 config NEED_SG_DMA_LENGTH
 725         def_bool y
 726
 727 config GENERIC_ISA_DMA
 728         bool
 729         depends on ISA_DMA_API
 730         default y
 731
 732 config PPC_INDIRECT_PCI
 733         bool
 734         depends on PCI
 735         default y if 40x || 44x
 736         default n
 737
 738 config EISA
 739         bool
 740
 741 config SBUS
 742         bool
 743
 744 config FSL_SOC
 745         bool
 746
 747 config FSL_PCI
 748         bool
 749         select PPC_INDIRECT_PCI
 750         select PCI_QUIRKS
 751
 752 config FSL_PMC
 753         bool
 754         default y
 755         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 756         help
 757           Freescale MPC85xx/MPC86xx power management controller support
 758           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 759
 760 config PPC4xx_CPM
 761         bool
 762         default y
 763         depends on SUSPEND && (44x || 40x)
 764         help
 765           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 766           It also enables support for two different idle states (idle-wait
 767           and idle-doze).
 768
 769 config 4xx_SOC
 770         bool
 771
 772 config FSL_LBC
 773         bool "Freescale Local Bus support"
 774         depends on FSL_SOC
 775         help
 776           Enables reporting of errors from the Freescale local bus
 777           controller.  Also contains some common code used by
 778           drivers for specific local bus peripherals.
 779
 780 config FSL_GTM
 781         bool
 782         depends on PPC_83xx || QUICC_ENGINE || CPM2
 783         help
 784           Freescale General-purpose Timers support
 785
 786 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 787 config MCA
 788         bool
 789
 790 # Platforms that what PCI turned unconditionally just do select PCI
 791 # in their config node.  Platforms that want to choose at config
 792 # time should select PPC_PCI_CHOICE
 793 config PPC_PCI_CHOICE
 794         bool
 795
 796 config PCI
 797         bool "PCI support" if PPC_PCI_CHOICE
 798         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 799                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 800         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 801         select GENERIC_PCI_IOMAP
 802         help
 803           Find out whether your system includes a PCI bus. PCI is the name of
 804           a bus system, i.e. the way the CPU talks to the other stuff inside
 805           your box.  If you say Y here, the kernel will include drivers and
 806           infrastructure code to support PCI bus devices.
 807
 808 config PCI_DOMAINS
 809         def_bool PCI
 810
 811 config PCI_SYSCALL
 812         def_bool PCI
 813
 814 config PCI_QSPAN
 815         bool "QSpan PCI"
 816         depends on !4xx && !CPM2 && 8xx
 817         select PPC_I8259
 818         help
 819           Say Y here if you have a system based on a Motorola 8xx-series
 820           embedded processor with a QSPAN PCI interface, otherwise say N.
 821
 822 config PCI_8260
 823         bool
 824         depends on PCI && 8260
 825         select PPC_INDIRECT_PCI
 826         default y
 827
 828 source "drivers/pci/pcie/Kconfig"
 829
 830 source "drivers/pci/Kconfig"
 831
 832 source "drivers/pcmcia/Kconfig"
 833
 834 source "drivers/pci/hotplug/Kconfig"
 835
 836 config HAS_RAPIDIO
 837         bool
 838         default n
 839
 840 config RAPIDIO
 841         tristate "RapidIO support"
 842         depends on HAS_RAPIDIO || PCI
 843         help
 844           If you say Y here, the kernel will include drivers and
 845           infrastructure code to support RapidIO interconnect devices.
 846
 847 config FSL_RIO
 848         bool "Freescale Embedded SRIO Controller support"
 849         depends on RAPIDIO = y && HAS_RAPIDIO
 850         default "n"
 851         ---help---
 852           Include support for RapidIO controller on Freescale embedded
 853           processors (MPC8548, MPC8641, etc).
 854
 855 source "drivers/rapidio/Kconfig"
 856
 857 endmenu
 858
 859 config NONSTATIC_KERNEL
 860         bool
 861         default n
 862
 863 menu "Advanced setup"
 864         depends on PPC32
 865
 866 config ADVANCED_OPTIONS
 867         bool "Prompt for advanced kernel configuration options"
 868         help
 869           This option will enable prompting for a variety of advanced kernel
 870           configuration options.  These options can cause the kernel to not
 871           work if they are set incorrectly, but can be used to optimize certain
 872           aspects of kernel memory management.
 873
 874           Unless you know what you are doing, say N here.
 875
 876 comment "Default settings for advanced configuration options are used"
 877         depends on !ADVANCED_OPTIONS
 878
 879 config LOWMEM_SIZE_BOOL
 880         bool "Set maximum low memory"
 881         depends on ADVANCED_OPTIONS
 882         help
 883           This option allows you to set the maximum amount of memory which
 884           will be used as "low memory", that is, memory which the kernel can
 885           access directly, without having to set up a kernel virtual mapping.
 886           This can be useful in optimizing the layout of kernel virtual
 887           memory.
 888
 889           Say N here unless you know what you are doing.
 890
 891 config LOWMEM_SIZE
 892         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 893         default "0x30000000"
 894
 895 config LOWMEM_CAM_NUM_BOOL
 896         bool "Set number of CAMs to use to map low memory"
 897         depends on ADVANCED_OPTIONS && FSL_BOOKE
 898         help
 899           This option allows you to set the maximum number of CAM slots that
 900           will be used to map low memory.  There are a limited number of slots
 901           available and even more limited number that will fit in the L1 MMU.
 902           However, using more entries will allow mapping more low memory.  This
 903           can be useful in optimizing the layout of kernel virtual memory.
 904
 905           Say N here unless you know what you are doing.
 906
 907 config LOWMEM_CAM_NUM
 908         depends on FSL_BOOKE
 909         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 910         default 3
 911
 912 config DYNAMIC_MEMSTART
 913         bool "Enable page aligned dynamic load address for kernel"
 914         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 915         select NONSTATIC_KERNEL
 916         help
 917           This option enables the kernel to be loaded at any page aligned
 918           physical address. The kernel creates a mapping from KERNELBASE to
 919           the address where the kernel is loaded. The page size here implies
 920           the TLB page size of the mapping for kernel on the particular platform.
 921           Please refer to the init code for finding the TLB page size.
 922
 923           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 924           kernel image, where the only restriction is the page aligned kernel
 925           load address. When this option is enabled, the compile time physical
 926           address CONFIG_PHYSICAL_START is ignored.
 927
 928           This option is overridden by CONFIG_RELOCATABLE
 929
 930 config RELOCATABLE
 931         bool "Build a relocatable kernel"
 932         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 933         select NONSTATIC_KERNEL
 934         help
 935           This builds a kernel image that is capable of running at the
 936           location the kernel is loaded at, without any alignment restrictions.
 937           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 938
 939           One use is for the kexec on panic case where the recovery kernel
 940           must live at a different physical address than the primary
 941           kernel.
 942
 943           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 944           it has been loaded at and the compile time physical addresses
 945           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 946           setting can still be useful to bootwrappers that need to know the
 947           load address of the kernel (eg. u-boot/mkimage).
 948
 949 config RELOCATABLE_PPC32
 950         def_bool y
 951         depends on PPC32 && RELOCATABLE
 952
 953 config PAGE_OFFSET_BOOL
 954         bool "Set custom page offset address"
 955         depends on ADVANCED_OPTIONS
 956         help
 957           This option allows you to set the kernel virtual address at which
 958           the kernel will map low memory.  This can be useful in optimizing
 959           the virtual memory layout of the system.
 960
 961           Say N here unless you know what you are doing.
 962
 963 config PAGE_OFFSET
 964         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 965         default "0xc0000000"
 966
 967 config KERNEL_START_BOOL
 968         bool "Set custom kernel base address"
 969         depends on ADVANCED_OPTIONS
 970         help
 971           This option allows you to set the kernel virtual address at which
 972           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 973           however there are times (like kdump) that one might not want them
 974           to be the same.
 975
 976           Say N here unless you know what you are doing.
 977
 978 config KERNEL_START
 979         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 980         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 981         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
 982         default "0xc0000000"
 983
 984 config PHYSICAL_START_BOOL
 985         bool "Set physical address where the kernel is loaded"
 986         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 987         help
 988           This gives the physical address where the kernel is loaded.
 989
 990           Say N here unless you know what you are doing.
 991
 992 config PHYSICAL_START
 993         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 994         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
 995         default "0x00000000"
 996
 997 config PHYSICAL_ALIGN
 998         hex
 999         default "0x04000000" if FSL_BOOKE
1000         help
1001           This value puts the alignment restrictions on physical address
1002           where kernel is loaded and run from. Kernel is compiled for an
1003           address which meets above alignment restriction.
1004
1005 config TASK_SIZE_BOOL
1006         bool "Set custom user task size"
1007         depends on ADVANCED_OPTIONS
1008         help
1009           This option allows you to set the amount of virtual address space
1010           allocated to user tasks.  This can be useful in optimizing the
1011           virtual memory layout of the system.
1012
1013           Say N here unless you know what you are doing.
1014
1015 config TASK_SIZE
1016         hex "Size of user task space" if TASK_SIZE_BOOL
1017         default "0x80000000" if PPC_8xx
1018         default "0xc0000000"
1019
1020 config CONSISTENT_SIZE_BOOL
1021         bool "Set custom consistent memory pool size"
1022         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1023         help
1024           This option allows you to set the size of the
1025           consistent memory pool.  This pool of virtual memory
1026           is used to make consistent memory allocations.
1027
1028 config CONSISTENT_SIZE
1029         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1030         default "0x00200000" if NOT_COHERENT_CACHE
1031
1032 config PIN_TLB
1033         bool "Pinned Kernel TLBs (860 ONLY)"
1034         depends on ADVANCED_OPTIONS && 8xx
1035 endmenu
1036
1037 if PPC64
1038 config RELOCATABLE
1039         bool "Build a relocatable kernel"
1040         depends on !COMPILE_TEST
1041         select NONSTATIC_KERNEL
1042         help
1043           This builds a kernel image that is capable of running anywhere
1044           in the RMA (real memory area) at any 16k-aligned base address.
1045           The kernel is linked as a position-independent executable (PIE)
1046           and contains dynamic relocations which are processed early
1047           in the bootup process.
1048
1049           One use is for the kexec on panic case where the recovery kernel
1050           must live at a different physical address than the primary
1051           kernel.
1052
1053 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1054 config PAGE_OFFSET
1055         hex
1056         default "0xc000000000000000"
1057 config KERNEL_START
1058         hex
1059         default "0xc000000000000000"
1060 config PHYSICAL_START
1061         hex
1062         default "0x00000000"
1063 endif
1064
1065 config  ARCH_RANDOM
1066         def_bool n
1067
1068 source "net/Kconfig"
1069
1070 source "drivers/Kconfig"
1071
1072 source "fs/Kconfig"
1073
1074 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1075
1076 source "lib/Kconfig"
1077
1078 source "arch/powerpc/Kconfig.debug"
1079
1080 source "security/Kconfig"
1081
1082 config KEYS_COMPAT
1083         bool
1084         depends on COMPAT && KEYS
1085         default y
1086
1087 source "crypto/Kconfig"
1088
1089 config PPC_LIB_RHEAP
1090         bool
1091
1092 source "arch/powerpc/kvm/Kconfig"