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 ARCH_SELECT_MEMORY_MODEL
 461         def_bool y
 462         depends on PPC64
 463
 464 config ARCH_FLATMEM_ENABLE
 465         def_bool y
 466         depends on (PPC64 && !NUMA) || PPC32
 467
 468 config ARCH_SPARSEMEM_ENABLE
 469         def_bool y
 470         depends on PPC64
 471         select SPARSEMEM_VMEMMAP_ENABLE
 472
 473 config ARCH_SPARSEMEM_DEFAULT
 474         def_bool y
 475         depends on (SMP && PPC_PSERIES) || PPC_PS3
 476
 477 config SYS_SUPPORTS_HUGETLBFS
 478         bool
 479
 480 source "mm/Kconfig"
 481
 482 config ARCH_MEMORY_PROBE
 483         def_bool y
 484         depends on MEMORY_HOTPLUG
 485
 486 # Some NUMA nodes have memory ranges that span
 487 # other nodes.  Even though a pfn is valid and
 488 # between a node's start and end pfns, it may not
 489 # reside on that node.  See memmap_init_zone()
 490 # for details.
 491 config NODES_SPAN_OTHER_NODES
 492         def_bool y
 493         depends on NEED_MULTIPLE_NODES
 494
 495 config PPC_HAS_HASH_64K
 496         bool
 497         depends on PPC64
 498         default n
 499
 500 config STDBINUTILS
 501         bool "Using standard binutils settings"
 502         depends on 44x
 503         default y
 504         help
 505           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 506           Note, that kernel will be able to run only those applications,
 507           which had been compiled using binutils later than 2.17.50.0.3 with
 508           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 509           the older binutils, you can patch them with a trivial patch, which
 510           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 511
 512 choice
 513         prompt "Page size"
 514         default PPC_4K_PAGES
 515         help
 516           Select the kernel logical page size. Increasing the page size
 517           will reduce software overhead at each page boundary, allow
 518           hardware prefetch mechanisms to be more effective, and allow
 519           larger dma transfers increasing IO efficiency and reducing
 520           overhead. However the utilization of memory will increase.
 521           For example, each cached file will using a multiple of the
 522           page size to hold its contents and the difference between the
 523           end of file and the end of page is wasted.
 524
 525           Some dedicated systems, such as software raid serving with
 526           accelerated calculations, have shown significant increases.
 527
 528           If you configure a 64 bit kernel for 64k pages but the
 529           processor does not support them, then the kernel will simulate
 530           them with 4k pages, loading them on demand, but with the
 531           reduced software overhead and larger internal fragmentation.
 532           For the 32 bit kernel, a large page option will not be offered
 533           unless it is supported by the configured processor.
 534
 535           If unsure, choose 4K_PAGES.
 536
 537 config PPC_4K_PAGES
 538         bool "4k page size"
 539
 540 config PPC_16K_PAGES
 541         bool "16k page size" if 44x
 542
 543 config PPC_64K_PAGES
 544         bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
 545         depends on !PPC_FSL_BOOK3E
 546         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 547
 548 config PPC_256K_PAGES
 549         bool "256k page size" if 44x
 550         depends on !STDBINUTILS
 551         help
 552           Make the page size 256k.
 553
 554           As the ELF standard only requires alignment to support page
 555           sizes up to 64k, you will need to compile all of your user
 556           space applications with a non-standard binutils settings
 557           (see the STDBINUTILS description for details).
 558
 559           Say N unless you know what you are doing.
 560
 561 endchoice
 562
 563 config FORCE_MAX_ZONEORDER
 564         int "Maximum zone order"
 565         range 9 64 if PPC64 && PPC_64K_PAGES
 566         default "9" if PPC64 && PPC_64K_PAGES
 567         range 13 64 if PPC64 && !PPC_64K_PAGES
 568         default "13" if PPC64 && !PPC_64K_PAGES
 569         range 9 64 if PPC32 && PPC_16K_PAGES
 570         default "9" if PPC32 && PPC_16K_PAGES
 571         range 7 64 if PPC32 && PPC_64K_PAGES
 572         default "7" if PPC32 && PPC_64K_PAGES
 573         range 5 64 if PPC32 && PPC_256K_PAGES
 574         default "5" if PPC32 && PPC_256K_PAGES
 575         range 11 64
 576         default "11"
 577         help
 578           The kernel memory allocator divides physically contiguous memory
 579           blocks into "zones", where each zone is a power of two number of
 580           pages.  This option selects the largest power of two that the kernel
 581           keeps in the memory allocator.  If you need to allocate very large
 582           blocks of physically contiguous memory, then you may need to
 583           increase this value.
 584
 585           This config option is actually maximum order plus one. For example,
 586           a value of 11 means that the largest free memory block is 2^10 pages.
 587
 588           The page size is not necessarily 4KB.  For example, on 64-bit
 589           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 590           this in mind when choosing a value for this option.
 591
 592 config PPC_SUBPAGE_PROT
 593         bool "Support setting protections for 4k subpages"
 594         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 595         help
 596           This option adds support for a system call to allow user programs
 597           to set access permissions (read/write, readonly, or no access)
 598           on the 4k subpages of each 64k page.
 599
 600 config SCHED_SMT
 601         bool "SMT (Hyperthreading) scheduler support"
 602         depends on PPC64 && SMP
 603         help
 604           SMT scheduler support improves the CPU scheduler's decision making
 605           when dealing with POWER5 cpus at a cost of slightly increased
 606           overhead in some places. If unsure say N here.
 607
 608 config PPC_DENORMALISATION
 609         bool "PowerPC denormalisation exception handling"
 610         depends on PPC_BOOK3S_64
 611         default "y" if PPC_POWERNV
 612         ---help---
 613           Add support for handling denormalisation of single precision
 614           values.  Useful for bare metal only.  If unsure say Y here.
 615
 616 config CMDLINE_BOOL
 617         bool "Default bootloader kernel arguments"
 618
 619 config CMDLINE
 620         string "Initial kernel command string"
 621         depends on CMDLINE_BOOL
 622         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 623         help
 624           On some platforms, there is currently no way for the boot loader to
 625           pass arguments to the kernel. For these platforms, you can supply
 626           some command-line options at build time by entering them here.  In
 627           most cases you will need to specify the root device here.
 628
 629 config CMDLINE_FORCE
 630         bool "Always use the default kernel command string"
 631         depends on CMDLINE_BOOL
 632         help
 633           Always use the default kernel command string, even if the boot
 634           loader passes other arguments to the kernel.
 635           This is useful if you cannot or don't want to change the
 636           command-line options your boot loader passes to the kernel.
 637
 638 config EXTRA_TARGETS
 639         string "Additional default image types"
 640         help
 641           List additional targets to be built by the bootwrapper here (separated
 642           by spaces).  This is useful for targets that depend of device tree
 643           files in the .dts directory.
 644
 645           Targets in this list will be build as part of the default build
 646           target, or when the user does a 'make zImage' or a
 647           'make zImage.initrd'.
 648
 649           If unsure, leave blank
 650
 651 config ARCH_WANTS_FREEZER_CONTROL
 652         def_bool y
 653         depends on ADB_PMU
 654
 655 source kernel/power/Kconfig
 656
 657 config SECCOMP
 658         bool "Enable seccomp to safely compute untrusted bytecode"
 659         depends on PROC_FS
 660         default y
 661         help
 662           This kernel feature is useful for number crunching applications
 663           that may need to compute untrusted bytecode during their
 664           execution. By using pipes or other transports made available to
 665           the process as file descriptors supporting the read/write
 666           syscalls, it's possible to isolate those applications in
 667           their own address space using seccomp. Once seccomp is
 668           enabled via /proc/<pid>/seccomp, it cannot be disabled
 669           and the task is only allowed to execute a few safe syscalls
 670           defined by each seccomp mode.
 671
 672           If unsure, say Y. Only embedded should say N here.
 673
 674 endmenu
 675
 676 config ISA_DMA_API
 677         bool
 678         default PCI
 679
 680 menu "Bus options"
 681
 682 config ISA
 683         bool "Support for ISA-bus hardware"
 684         depends on PPC_CHRP
 685         select PPC_I8259
 686         help
 687           Find out whether you have ISA slots on your motherboard.  ISA is the
 688           name of a bus system, i.e. the way the CPU talks to the other stuff
 689           inside your box.  If you have an Apple machine, say N here; if you
 690           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 691           embedded board, consult your board documentation.
 692
 693 config ZONE_DMA
 694         bool
 695         default y
 696
 697 config NEED_DMA_MAP_STATE
 698         def_bool (PPC64 || NOT_COHERENT_CACHE)
 699
 700 config NEED_SG_DMA_LENGTH
 701         def_bool y
 702
 703 config GENERIC_ISA_DMA
 704         bool
 705         depends on ISA_DMA_API
 706         default y
 707
 708 config PPC_INDIRECT_PCI
 709         bool
 710         depends on PCI
 711         default y if 40x || 44x
 712         default n
 713
 714 config EISA
 715         bool
 716
 717 config SBUS
 718         bool
 719
 720 config FSL_SOC
 721         bool
 722
 723 config FSL_PCI
 724         bool
 725         select PPC_INDIRECT_PCI
 726         select PCI_QUIRKS
 727
 728 config FSL_PMC
 729         bool
 730         default y
 731         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 732         help
 733           Freescale MPC85xx/MPC86xx power management controller support
 734           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 735
 736 config PPC4xx_CPM
 737         bool
 738         default y
 739         depends on SUSPEND && (44x || 40x)
 740         help
 741           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 742           It also enables support for two different idle states (idle-wait
 743           and idle-doze).
 744
 745 config 4xx_SOC
 746         bool
 747
 748 config FSL_LBC
 749         bool "Freescale Local Bus support"
 750         depends on FSL_SOC
 751         help
 752           Enables reporting of errors from the Freescale local bus
 753           controller.  Also contains some common code used by
 754           drivers for specific local bus peripherals.
 755
 756 config FSL_GTM
 757         bool
 758         depends on PPC_83xx || QUICC_ENGINE || CPM2
 759         help
 760           Freescale General-purpose Timers support
 761
 762 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 763 config MCA
 764         bool
 765
 766 # Platforms that what PCI turned unconditionally just do select PCI
 767 # in their config node.  Platforms that want to choose at config
 768 # time should select PPC_PCI_CHOICE
 769 config PPC_PCI_CHOICE
 770         bool
 771
 772 config PCI
 773         bool "PCI support" if PPC_PCI_CHOICE
 774         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 775                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 776         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 777         select GENERIC_PCI_IOMAP
 778         help
 779           Find out whether your system includes a PCI bus. PCI is the name of
 780           a bus system, i.e. the way the CPU talks to the other stuff inside
 781           your box.  If you say Y here, the kernel will include drivers and
 782           infrastructure code to support PCI bus devices.
 783
 784 config PCI_DOMAINS
 785         def_bool PCI
 786
 787 config PCI_SYSCALL
 788         def_bool PCI
 789
 790 config PCI_QSPAN
 791         bool "QSpan PCI"
 792         depends on !4xx && !CPM2 && 8xx
 793         select PPC_I8259
 794         help
 795           Say Y here if you have a system based on a Motorola 8xx-series
 796           embedded processor with a QSPAN PCI interface, otherwise say N.
 797
 798 config PCI_8260
 799         bool
 800         depends on PCI && 8260
 801         select PPC_INDIRECT_PCI
 802         default y
 803
 804 source "drivers/pci/pcie/Kconfig"
 805
 806 source "drivers/pci/Kconfig"
 807
 808 source "drivers/pcmcia/Kconfig"
 809
 810 source "drivers/pci/hotplug/Kconfig"
 811
 812 config HAS_RAPIDIO
 813         bool
 814         default n
 815
 816 config RAPIDIO
 817         tristate "RapidIO support"
 818         depends on HAS_RAPIDIO || PCI
 819         help
 820           If you say Y here, the kernel will include drivers and
 821           infrastructure code to support RapidIO interconnect devices.
 822
 823 config FSL_RIO
 824         bool "Freescale Embedded SRIO Controller support"
 825         depends on RAPIDIO = y && HAS_RAPIDIO
 826         default "n"
 827         ---help---
 828           Include support for RapidIO controller on Freescale embedded
 829           processors (MPC8548, MPC8641, etc).
 830
 831 source "drivers/rapidio/Kconfig"
 832
 833 endmenu
 834
 835 config NONSTATIC_KERNEL
 836         bool
 837         default n
 838
 839 menu "Advanced setup"
 840         depends on PPC32
 841
 842 config ADVANCED_OPTIONS
 843         bool "Prompt for advanced kernel configuration options"
 844         help
 845           This option will enable prompting for a variety of advanced kernel
 846           configuration options.  These options can cause the kernel to not
 847           work if they are set incorrectly, but can be used to optimize certain
 848           aspects of kernel memory management.
 849
 850           Unless you know what you are doing, say N here.
 851
 852 comment "Default settings for advanced configuration options are used"
 853         depends on !ADVANCED_OPTIONS
 854
 855 config LOWMEM_SIZE_BOOL
 856         bool "Set maximum low memory"
 857         depends on ADVANCED_OPTIONS
 858         help
 859           This option allows you to set the maximum amount of memory which
 860           will be used as "low memory", that is, memory which the kernel can
 861           access directly, without having to set up a kernel virtual mapping.
 862           This can be useful in optimizing the layout of kernel virtual
 863           memory.
 864
 865           Say N here unless you know what you are doing.
 866
 867 config LOWMEM_SIZE
 868         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 869         default "0x30000000"
 870
 871 config LOWMEM_CAM_NUM_BOOL
 872         bool "Set number of CAMs to use to map low memory"
 873         depends on ADVANCED_OPTIONS && FSL_BOOKE
 874         help
 875           This option allows you to set the maximum number of CAM slots that
 876           will be used to map low memory.  There are a limited number of slots
 877           available and even more limited number that will fit in the L1 MMU.
 878           However, using more entries will allow mapping more low memory.  This
 879           can be useful in optimizing the layout of kernel virtual memory.
 880
 881           Say N here unless you know what you are doing.
 882
 883 config LOWMEM_CAM_NUM
 884         depends on FSL_BOOKE
 885         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 886         default 3
 887
 888 config DYNAMIC_MEMSTART
 889         bool "Enable page aligned dynamic load address for kernel"
 890         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 891         select NONSTATIC_KERNEL
 892         help
 893           This option enables the kernel to be loaded at any page aligned
 894           physical address. The kernel creates a mapping from KERNELBASE to
 895           the address where the kernel is loaded. The page size here implies
 896           the TLB page size of the mapping for kernel on the particular platform.
 897           Please refer to the init code for finding the TLB page size.
 898
 899           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 900           kernel image, where the only restriction is the page aligned kernel
 901           load address. When this option is enabled, the compile time physical
 902           address CONFIG_PHYSICAL_START is ignored.
 903
 904           This option is overridden by CONFIG_RELOCATABLE
 905
 906 config RELOCATABLE
 907         bool "Build a relocatable kernel"
 908         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 909         select NONSTATIC_KERNEL
 910         help
 911           This builds a kernel image that is capable of running at the
 912           location the kernel is loaded at, without any alignment restrictions.
 913           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 914
 915           One use is for the kexec on panic case where the recovery kernel
 916           must live at a different physical address than the primary
 917           kernel.
 918
 919           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 920           it has been loaded at and the compile time physical addresses
 921           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 922           setting can still be useful to bootwrappers that need to know the
 923           load address of the kernel (eg. u-boot/mkimage).
 924
 925 config RELOCATABLE_PPC32
 926         def_bool y
 927         depends on PPC32 && RELOCATABLE
 928
 929 config PAGE_OFFSET_BOOL
 930         bool "Set custom page offset address"
 931         depends on ADVANCED_OPTIONS
 932         help
 933           This option allows you to set the kernel virtual address at which
 934           the kernel will map low memory.  This can be useful in optimizing
 935           the virtual memory layout of the system.
 936
 937           Say N here unless you know what you are doing.
 938
 939 config PAGE_OFFSET
 940         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 941         default "0xc0000000"
 942
 943 config KERNEL_START_BOOL
 944         bool "Set custom kernel base address"
 945         depends on ADVANCED_OPTIONS
 946         help
 947           This option allows you to set the kernel virtual address at which
 948           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 949           however there are times (like kdump) that one might not want them
 950           to be the same.
 951
 952           Say N here unless you know what you are doing.
 953
 954 config KERNEL_START
 955         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 956         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 957         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
 958         default "0xc0000000"
 959
 960 config PHYSICAL_START_BOOL
 961         bool "Set physical address where the kernel is loaded"
 962         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 963         help
 964           This gives the physical address where the kernel is loaded.
 965
 966           Say N here unless you know what you are doing.
 967
 968 config PHYSICAL_START
 969         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 970         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
 971         default "0x00000000"
 972
 973 config PHYSICAL_ALIGN
 974         hex
 975         default "0x04000000" if FSL_BOOKE
 976         help
 977           This value puts the alignment restrictions on physical address
 978           where kernel is loaded and run from. Kernel is compiled for an
 979           address which meets above alignment restriction.
 980
 981 config TASK_SIZE_BOOL
 982         bool "Set custom user task size"
 983         depends on ADVANCED_OPTIONS
 984         help
 985           This option allows you to set the amount of virtual address space
 986           allocated to user tasks.  This can be useful in optimizing the
 987           virtual memory layout of the system.
 988
 989           Say N here unless you know what you are doing.
 990
 991 config TASK_SIZE
 992         hex "Size of user task space" if TASK_SIZE_BOOL
 993         default "0x80000000" if PPC_8xx
 994         default "0xc0000000"
 995
 996 config CONSISTENT_SIZE_BOOL
 997         bool "Set custom consistent memory pool size"
 998         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
 999         help
1000           This option allows you to set the size of the
1001           consistent memory pool.  This pool of virtual memory
1002           is used to make consistent memory allocations.
1003
1004 config CONSISTENT_SIZE
1005         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1006         default "0x00200000" if NOT_COHERENT_CACHE
1007
1008 config PIN_TLB
1009         bool "Pinned Kernel TLBs (860 ONLY)"
1010         depends on ADVANCED_OPTIONS && 8xx
1011 endmenu
1012
1013 if PPC64
1014 config RELOCATABLE
1015         bool "Build a relocatable kernel"
1016         select NONSTATIC_KERNEL
1017         help
1018           This builds a kernel image that is capable of running anywhere
1019           in the RMA (real memory area) at any 16k-aligned base address.
1020           The kernel is linked as a position-independent executable (PIE)
1021           and contains dynamic relocations which are processed early
1022           in the bootup process.
1023
1024           One use is for the kexec on panic case where the recovery kernel
1025           must live at a different physical address than the primary
1026           kernel.
1027
1028 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1029 config PAGE_OFFSET
1030         hex
1031         default "0xc000000000000000"
1032 config KERNEL_START
1033         hex
1034         default "0xc000000000000000"
1035 config PHYSICAL_START
1036         hex
1037         default "0x00000000"
1038 endif
1039
1040 config  ARCH_RANDOM
1041         def_bool n
1042
1043 source "net/Kconfig"
1044
1045 source "drivers/Kconfig"
1046
1047 source "fs/Kconfig"
1048
1049 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1050
1051 source "lib/Kconfig"
1052
1053 source "arch/powerpc/Kconfig.debug"
1054
1055 source "security/Kconfig"
1056
1057 config KEYS_COMPAT
1058         bool
1059         depends on COMPAT && KEYS
1060         default y
1061
1062 source "crypto/Kconfig"
1063
1064 config PPC_LIB_RHEAP
1065         bool
1066
1067 source "arch/powerpc/kvm/Kconfig"