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