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