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 ARCH_HAS_DMA_SET_COHERENT_MASK
  86         bool
  87
  88 config PPC
  89         bool
  90         default y
  91         select ARCH_MIGHT_HAVE_PC_PARPORT
  92         select ARCH_MIGHT_HAVE_PC_SERIO
  93         select BINFMT_ELF
  94         select ARCH_HAS_ELF_RANDOMIZE
  95         select OF
  96         select OF_EARLY_FLATTREE
  97         select OF_RESERVED_MEM
  98         select HAVE_FTRACE_MCOUNT_RECORD
  99         select HAVE_DYNAMIC_FTRACE
 100         select HAVE_FUNCTION_TRACER
 101         select HAVE_FUNCTION_GRAPH_TRACER
 102         select SYSCTL_EXCEPTION_TRACE
 103         select ARCH_WANT_OPTIONAL_GPIOLIB
 104         select VIRT_TO_BUS if !PPC64
 105         select HAVE_IDE
 106         select HAVE_IOREMAP_PROT
 107         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
 108         select HAVE_KPROBES
 109         select HAVE_ARCH_KGDB
 110         select HAVE_KRETPROBES
 111         select HAVE_ARCH_TRACEHOOK
 112         select HAVE_MEMBLOCK
 113         select HAVE_MEMBLOCK_NODE_MAP
 114         select HAVE_DMA_ATTRS
 115         select HAVE_DMA_API_DEBUG
 116         select HAVE_OPROFILE
 117         select HAVE_DEBUG_KMEMLEAK
 118         select ARCH_HAS_SG_CHAIN
 119         select GENERIC_ATOMIC64 if PPC32
 120         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 121         select HAVE_PERF_EVENTS
 122         select HAVE_REGS_AND_STACK_ACCESS_API
 123         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 124         select ARCH_WANT_IPC_PARSE_VERSION
 125         select SPARSE_IRQ
 126         select IRQ_DOMAIN
 127         select GENERIC_IRQ_SHOW
 128         select GENERIC_IRQ_SHOW_LEVEL
 129         select IRQ_FORCED_THREADING
 130         select HAVE_RCU_TABLE_FREE if SMP
 131         select HAVE_SYSCALL_TRACEPOINTS
 132         select HAVE_BPF_JIT
 133         select HAVE_ARCH_JUMP_LABEL
 134         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 135         select ARCH_HAS_GCOV_PROFILE_ALL
 136         select GENERIC_SMP_IDLE_THREAD
 137         select GENERIC_CMOS_UPDATE
 138         select GENERIC_TIME_VSYSCALL_OLD
 139         select GENERIC_CLOCKEVENTS
 140         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 141         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 142         select GENERIC_STRNCPY_FROM_USER
 143         select GENERIC_STRNLEN_USER
 144         select HAVE_MOD_ARCH_SPECIFIC
 145         select MODULES_USE_ELF_RELA
 146         select CLONE_BACKWARDS
 147         select ARCH_USE_BUILTIN_BSWAP
 148         select OLD_SIGSUSPEND
 149         select OLD_SIGACTION if PPC32
 150         select HAVE_DEBUG_STACKOVERFLOW
 151         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 152         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 153         select HAVE_ARCH_AUDITSYSCALL
 154         select ARCH_SUPPORTS_ATOMIC_RMW
 155         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 156         select NO_BOOTMEM
 157         select HAVE_GENERIC_RCU_GUP
 158         select HAVE_PERF_EVENTS_NMI if PPC64
 159         select EDAC_SUPPORT
 160         select EDAC_ATOMIC_SCRUB
 161         select ARCH_HAS_DMA_SET_COHERENT_MASK
 162         select ARCH_HAS_DEVMEM_IS_ALLOWED
 163         select HAVE_ARCH_SECCOMP_FILTER
 164
 165 config GENERIC_CSUM
 166         def_bool CPU_LITTLE_ENDIAN
 167
 168 config EARLY_PRINTK
 169         bool
 170         default y
 171
 172 config PANIC_TIMEOUT
 173         int
 174         default 180
 175
 176 config COMPAT
 177         bool
 178         default y if PPC64
 179         select COMPAT_BINFMT_ELF
 180         select ARCH_WANT_OLD_COMPAT_IPC
 181         select COMPAT_OLD_SIGACTION
 182
 183 config SYSVIPC_COMPAT
 184         bool
 185         depends on COMPAT && SYSVIPC
 186         default y
 187
 188 # All PPC32s use generic nvram driver through ppc_md
 189 config GENERIC_NVRAM
 190         bool
 191         default y if PPC32
 192
 193 config SCHED_OMIT_FRAME_POINTER
 194         bool
 195         default y
 196
 197 config ARCH_MAY_HAVE_PC_FDC
 198         bool
 199         default PCI
 200
 201 config PPC_UDBG_16550
 202         bool
 203         default n
 204
 205 config GENERIC_TBSYNC
 206         bool
 207         default y if PPC32 && SMP
 208         default n
 209
 210 config AUDIT_ARCH
 211         bool
 212         default y
 213
 214 config GENERIC_BUG
 215         bool
 216         default y
 217         depends on BUG
 218
 219 config SYS_SUPPORTS_APM_EMULATION
 220         default y if PMAC_APM_EMU
 221         bool
 222
 223 config EPAPR_BOOT
 224         bool
 225         help
 226           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 227         default n
 228
 229 config DEFAULT_UIMAGE
 230         bool
 231         help
 232           Used to allow a board to specify it wants a uImage built by default
 233         default n
 234
 235 config ARCH_HIBERNATION_POSSIBLE
 236         bool
 237         default y
 238
 239 config ARCH_SUSPEND_POSSIBLE
 240         def_bool y
 241         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 242                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 243                    || 44x || 40x
 244
 245 config PPC_DCR_NATIVE
 246         bool
 247         default n
 248
 249 config PPC_DCR_MMIO
 250         bool
 251         default n
 252
 253 config PPC_DCR
 254         bool
 255         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 256         default y
 257
 258 config PPC_OF_PLATFORM_PCI
 259         bool
 260         depends on PCI
 261         depends on PPC64 # not supported on 32 bits yet
 262         default n
 263
 264 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 265         depends on PPC32 || PPC_STD_MMU_64
 266         def_bool y
 267
 268 config ARCH_SUPPORTS_UPROBES
 269         def_bool y
 270
 271 config PPC_ADV_DEBUG_REGS
 272         bool
 273         depends on 40x || BOOKE
 274         default y
 275
 276 config PPC_ADV_DEBUG_IACS
 277         int
 278         depends on PPC_ADV_DEBUG_REGS
 279         default 4 if 44x
 280         default 2
 281
 282 config PPC_ADV_DEBUG_DACS
 283         int
 284         depends on PPC_ADV_DEBUG_REGS
 285         default 2
 286
 287 config PPC_ADV_DEBUG_DVCS
 288         int
 289         depends on PPC_ADV_DEBUG_REGS
 290         default 2 if 44x
 291         default 0
 292
 293 config PPC_ADV_DEBUG_DAC_RANGE
 294         bool
 295         depends on PPC_ADV_DEBUG_REGS && 44x
 296         default y
 297
 298 config PPC_EMULATE_SSTEP
 299         bool
 300         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 301
 302 config ZONE_DMA32
 303         bool
 304         default y if PPC64
 305
 306 config PGTABLE_LEVELS
 307         int
 308         default 2 if !PPC64
 309         default 3 if PPC_64K_PAGES
 310         default 4
 311
 312 source "init/Kconfig"
 313
 314 source "kernel/Kconfig.freezer"
 315
 316 source "arch/powerpc/sysdev/Kconfig"
 317 source "arch/powerpc/platforms/Kconfig"
 318
 319 menu "Kernel options"
 320
 321 config HIGHMEM
 322         bool "High memory support"
 323         depends on PPC32
 324
 325 source kernel/Kconfig.hz
 326 source kernel/Kconfig.preempt
 327 source "fs/Kconfig.binfmt"
 328
 329 config HUGETLB_PAGE_SIZE_VARIABLE
 330         bool
 331         depends on HUGETLB_PAGE
 332         default y
 333
 334 config MATH_EMULATION
 335         bool "Math emulation"
 336         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 337         ---help---
 338           Some PowerPC chips designed for embedded applications do not have
 339           a floating-point unit and therefore do not implement the
 340           floating-point instructions in the PowerPC instruction set.  If you
 341           say Y here, the kernel will include code to emulate a floating-point
 342           unit, which will allow programs that use floating-point
 343           instructions to run.
 344
 345           This is also useful to emulate missing (optional) instructions
 346           such as fsqrt on cores that do have an FPU but do not implement
 347           them (such as Freescale BookE).
 348
 349 choice
 350         prompt "Math emulation options"
 351         default MATH_EMULATION_FULL
 352         depends on MATH_EMULATION
 353
 354 config  MATH_EMULATION_FULL
 355         bool "Emulate all the floating point instructions"
 356         ---help---
 357           Select this option will enable the kernel to support to emulate
 358           all the floating point instructions. If your SoC doesn't have
 359           a FPU, you should select this.
 360
 361 config MATH_EMULATION_HW_UNIMPLEMENTED
 362         bool "Just emulate the FPU unimplemented instructions"
 363         ---help---
 364           Select this if you know there does have a hardware FPU on your
 365           SoC, but some floating point instructions are not implemented by that.
 366
 367 endchoice
 368
 369 config PPC_TRANSACTIONAL_MEM
 370        bool "Transactional Memory support for POWERPC"
 371        depends on PPC_BOOK3S_64
 372        depends on SMP
 373        select ALTIVEC
 374        select VSX
 375        default n
 376        ---help---
 377          Support user-mode Transactional Memory on POWERPC.
 378
 379 config IOMMU_HELPER
 380         def_bool PPC64
 381
 382 config SWIOTLB
 383         bool "SWIOTLB support"
 384         default n
 385         select IOMMU_HELPER
 386         ---help---
 387           Support for IO bounce buffering for systems without an IOMMU.
 388           This allows us to DMA to the full physical address space on
 389           platforms where the size of a physical address is larger
 390           than the bus address.  Not all platforms support this.
 391
 392 config HOTPLUG_CPU
 393         bool "Support for enabling/disabling CPUs"
 394         depends on SMP && (PPC_PSERIES || \
 395         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
 396         ---help---
 397           Say Y here to be able to disable and re-enable individual
 398           CPUs at runtime on SMP machines.
 399
 400           Say N if you are unsure.
 401
 402 config ARCH_CPU_PROBE_RELEASE
 403         def_bool y
 404         depends on HOTPLUG_CPU
 405
 406 config ARCH_ENABLE_MEMORY_HOTPLUG
 407         def_bool y
 408
 409 config ARCH_HAS_WALK_MEMORY
 410         def_bool y
 411
 412 config ARCH_ENABLE_MEMORY_HOTREMOVE
 413         def_bool y
 414
 415 config PPC64_SUPPORTS_MEMORY_FAILURE
 416         bool "Add support for memory hwpoison"
 417         depends on PPC_BOOK3S_64
 418         default "y" if PPC_POWERNV
 419         select ARCH_SUPPORTS_MEMORY_FAILURE
 420
 421 config KEXEC
 422         bool "kexec system call"
 423         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 424         select KEXEC_CORE
 425         help
 426           kexec is a system call that implements the ability to shutdown your
 427           current kernel, and to start another kernel.  It is like a reboot
 428           but it is independent of the system firmware.   And like a reboot
 429           you can start any kernel with it, not just Linux.
 430
 431           The name comes from the similarity to the exec system call.
 432
 433           It is an ongoing process to be certain the hardware in a machine
 434           is properly shutdown, so do not be surprised if this code does not
 435           initially work for you.  As of this writing the exact hardware
 436           interface is strongly in flux, so no good recommendation can be
 437           made.
 438
 439 config CRASH_DUMP
 440         bool "Build a kdump crash kernel"
 441         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 442         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 443         help
 444           Build a kernel suitable for use as a kdump capture kernel.
 445           The same kernel binary can be used as production kernel and dump
 446           capture kernel.
 447
 448 config FA_DUMP
 449         bool "Firmware-assisted dump"
 450         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 451         help
 452           A robust mechanism to get reliable kernel crash dump with
 453           assistance from firmware. This approach does not use kexec,
 454           instead firmware assists in booting the kdump kernel
 455           while preserving memory contents. Firmware-assisted dump
 456           is meant to be a kdump replacement offering robustness and
 457           speed not possible without system firmware assistance.
 458
 459           If unsure, say "N"
 460
 461 config IRQ_ALL_CPUS
 462         bool "Distribute interrupts on all CPUs by default"
 463         depends on SMP
 464         help
 465           This option gives the kernel permission to distribute IRQs across
 466           multiple CPUs.  Saying N here will route all IRQs to the first
 467           CPU.  Generally saying Y is safe, although some problems have been
 468           reported with SMP Power Macintoshes with this option enabled.
 469
 470 config NUMA
 471         bool "NUMA support"
 472         depends on PPC64
 473         default y if SMP && PPC_PSERIES
 474
 475 config NODES_SHIFT
 476         int
 477         default "8" if PPC64
 478         default "4"
 479         depends on NEED_MULTIPLE_NODES
 480
 481 config USE_PERCPU_NUMA_NODE_ID
 482         def_bool y
 483         depends on NUMA
 484
 485 config HAVE_MEMORYLESS_NODES
 486         def_bool y
 487         depends on NUMA
 488
 489 config ARCH_SELECT_MEMORY_MODEL
 490         def_bool y
 491         depends on PPC64
 492
 493 config ARCH_FLATMEM_ENABLE
 494         def_bool y
 495         depends on (PPC64 && !NUMA) || PPC32
 496
 497 config ARCH_SPARSEMEM_ENABLE
 498         def_bool y
 499         depends on PPC64
 500         select SPARSEMEM_VMEMMAP_ENABLE
 501
 502 config ARCH_SPARSEMEM_DEFAULT
 503         def_bool y
 504         depends on (SMP && PPC_PSERIES) || PPC_PS3
 505
 506 config SYS_SUPPORTS_HUGETLBFS
 507         bool
 508
 509 source "mm/Kconfig"
 510
 511 config ARCH_MEMORY_PROBE
 512         def_bool y
 513         depends on MEMORY_HOTPLUG
 514
 515 # Some NUMA nodes have memory ranges that span
 516 # other nodes.  Even though a pfn is valid and
 517 # between a node's start and end pfns, it may not
 518 # reside on that node.  See memmap_init_zone()
 519 # for details.
 520 config NODES_SPAN_OTHER_NODES
 521         def_bool y
 522         depends on NEED_MULTIPLE_NODES
 523
 524 config STDBINUTILS
 525         bool "Using standard binutils settings"
 526         depends on 44x
 527         default y
 528         help
 529           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 530           Note, that kernel will be able to run only those applications,
 531           which had been compiled using binutils later than 2.17.50.0.3 with
 532           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 533           the older binutils, you can patch them with a trivial patch, which
 534           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 535
 536 choice
 537         prompt "Page size"
 538         default PPC_4K_PAGES
 539         help
 540           Select the kernel logical page size. Increasing the page size
 541           will reduce software overhead at each page boundary, allow
 542           hardware prefetch mechanisms to be more effective, and allow
 543           larger dma transfers increasing IO efficiency and reducing
 544           overhead. However the utilization of memory will increase.
 545           For example, each cached file will using a multiple of the
 546           page size to hold its contents and the difference between the
 547           end of file and the end of page is wasted.
 548
 549           Some dedicated systems, such as software raid serving with
 550           accelerated calculations, have shown significant increases.
 551
 552           If you configure a 64 bit kernel for 64k pages but the
 553           processor does not support them, then the kernel will simulate
 554           them with 4k pages, loading them on demand, but with the
 555           reduced software overhead and larger internal fragmentation.
 556           For the 32 bit kernel, a large page option will not be offered
 557           unless it is supported by the configured processor.
 558
 559           If unsure, choose 4K_PAGES.
 560
 561 config PPC_4K_PAGES
 562         bool "4k page size"
 563         select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S
 564
 565 config PPC_16K_PAGES
 566         bool "16k page size"
 567         depends on 44x || PPC_8xx
 568
 569 config PPC_64K_PAGES
 570         bool "64k page size"
 571         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 572         select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S
 573
 574 config PPC_256K_PAGES
 575         bool "256k page size"
 576         depends on 44x && !STDBINUTILS
 577         help
 578           Make the page size 256k.
 579
 580           As the ELF standard only requires alignment to support page
 581           sizes up to 64k, you will need to compile all of your user
 582           space applications with a non-standard binutils settings
 583           (see the STDBINUTILS description for details).
 584
 585           Say N unless you know what you are doing.
 586
 587 endchoice
 588
 589 config FORCE_MAX_ZONEORDER
 590         int "Maximum zone order"
 591         range 9 64 if PPC64 && PPC_64K_PAGES
 592         default "9" if PPC64 && PPC_64K_PAGES
 593         range 13 64 if PPC64 && !PPC_64K_PAGES
 594         default "13" if PPC64 && !PPC_64K_PAGES
 595         range 9 64 if PPC32 && PPC_16K_PAGES
 596         default "9" if PPC32 && PPC_16K_PAGES
 597         range 7 64 if PPC32 && PPC_64K_PAGES
 598         default "7" if PPC32 && PPC_64K_PAGES
 599         range 5 64 if PPC32 && PPC_256K_PAGES
 600         default "5" if PPC32 && PPC_256K_PAGES
 601         range 11 64
 602         default "11"
 603         help
 604           The kernel memory allocator divides physically contiguous memory
 605           blocks into "zones", where each zone is a power of two number of
 606           pages.  This option selects the largest power of two that the kernel
 607           keeps in the memory allocator.  If you need to allocate very large
 608           blocks of physically contiguous memory, then you may need to
 609           increase this value.
 610
 611           This config option is actually maximum order plus one. For example,
 612           a value of 11 means that the largest free memory block is 2^10 pages.
 613
 614           The page size is not necessarily 4KB.  For example, on 64-bit
 615           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 616           this in mind when choosing a value for this option.
 617
 618 config PPC_SUBPAGE_PROT
 619         bool "Support setting protections for 4k subpages"
 620         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 621         help
 622           This option adds support for a system call to allow user programs
 623           to set access permissions (read/write, readonly, or no access)
 624           on the 4k subpages of each 64k page.
 625
 626 config PPC_COPRO_BASE
 627         bool
 628         default n
 629
 630 config SCHED_SMT
 631         bool "SMT (Hyperthreading) scheduler support"
 632         depends on PPC64 && SMP
 633         help
 634           SMT scheduler support improves the CPU scheduler's decision making
 635           when dealing with POWER5 cpus at a cost of slightly increased
 636           overhead in some places. If unsure say N here.
 637
 638 config PPC_DENORMALISATION
 639         bool "PowerPC denormalisation exception handling"
 640         depends on PPC_BOOK3S_64
 641         default "y" if PPC_POWERNV
 642         ---help---
 643           Add support for handling denormalisation of single precision
 644           values.  Useful for bare metal only.  If unsure say Y here.
 645
 646 config CMDLINE_BOOL
 647         bool "Default bootloader kernel arguments"
 648
 649 config CMDLINE
 650         string "Initial kernel command string"
 651         depends on CMDLINE_BOOL
 652         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 653         help
 654           On some platforms, there is currently no way for the boot loader to
 655           pass arguments to the kernel. For these platforms, you can supply
 656           some command-line options at build time by entering them here.  In
 657           most cases you will need to specify the root device here.
 658
 659 config CMDLINE_FORCE
 660         bool "Always use the default kernel command string"
 661         depends on CMDLINE_BOOL
 662         help
 663           Always use the default kernel command string, even if the boot
 664           loader passes other arguments to the kernel.
 665           This is useful if you cannot or don't want to change the
 666           command-line options your boot loader passes to the kernel.
 667
 668 config EXTRA_TARGETS
 669         string "Additional default image types"
 670         help
 671           List additional targets to be built by the bootwrapper here (separated
 672           by spaces).  This is useful for targets that depend of device tree
 673           files in the .dts directory.
 674
 675           Targets in this list will be build as part of the default build
 676           target, or when the user does a 'make zImage' or a
 677           'make zImage.initrd'.
 678
 679           If unsure, leave blank
 680
 681 config ARCH_WANTS_FREEZER_CONTROL
 682         def_bool y
 683         depends on ADB_PMU
 684
 685 source kernel/power/Kconfig
 686
 687 config SECCOMP
 688         bool "Enable seccomp to safely compute untrusted bytecode"
 689         depends on PROC_FS
 690         default y
 691         help
 692           This kernel feature is useful for number crunching applications
 693           that may need to compute untrusted bytecode during their
 694           execution. By using pipes or other transports made available to
 695           the process as file descriptors supporting the read/write
 696           syscalls, it's possible to isolate those applications in
 697           their own address space using seccomp. Once seccomp is
 698           enabled via /proc/<pid>/seccomp, it cannot be disabled
 699           and the task is only allowed to execute a few safe syscalls
 700           defined by each seccomp mode.
 701
 702           If unsure, say Y. Only embedded should say N here.
 703
 704 endmenu
 705
 706 config ISA_DMA_API
 707         bool
 708         default PCI
 709
 710 menu "Bus options"
 711
 712 config ISA
 713         bool "Support for ISA-bus hardware"
 714         depends on PPC_CHRP
 715         select PPC_I8259
 716         help
 717           Find out whether you have ISA slots on your motherboard.  ISA is the
 718           name of a bus system, i.e. the way the CPU talks to the other stuff
 719           inside your box.  If you have an Apple machine, say N here; if you
 720           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 721           embedded board, consult your board documentation.
 722
 723 config ZONE_DMA
 724         bool
 725         default y
 726
 727 config NEED_DMA_MAP_STATE
 728         def_bool (PPC64 || NOT_COHERENT_CACHE)
 729
 730 config NEED_SG_DMA_LENGTH
 731         def_bool y
 732
 733 config GENERIC_ISA_DMA
 734         bool
 735         depends on ISA_DMA_API
 736         default y
 737
 738 config PPC_INDIRECT_PCI
 739         bool
 740         depends on PCI
 741         default y if 40x || 44x
 742         default n
 743
 744 config EISA
 745         bool
 746
 747 config SBUS
 748         bool
 749
 750 config FSL_SOC
 751         bool
 752
 753 config FSL_PCI
 754         bool
 755         select PPC_INDIRECT_PCI
 756         select PCI_QUIRKS
 757
 758 config FSL_PMC
 759         bool
 760         default y
 761         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 762         help
 763           Freescale MPC85xx/MPC86xx power management controller support
 764           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 765
 766 config PPC4xx_CPM
 767         bool
 768         default y
 769         depends on SUSPEND && (44x || 40x)
 770         help
 771           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 772           It also enables support for two different idle states (idle-wait
 773           and idle-doze).
 774
 775 config 4xx_SOC
 776         bool
 777
 778 config FSL_LBC
 779         bool "Freescale Local Bus support"
 780         depends on FSL_SOC
 781         help
 782           Enables reporting of errors from the Freescale local bus
 783           controller.  Also contains some common code used by
 784           drivers for specific local bus peripherals.
 785
 786 config FSL_GTM
 787         bool
 788         depends on PPC_83xx || QUICC_ENGINE || CPM2
 789         help
 790           Freescale General-purpose Timers support
 791
 792 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 793 config MCA
 794         bool
 795
 796 # Platforms that what PCI turned unconditionally just do select PCI
 797 # in their config node.  Platforms that want to choose at config
 798 # time should select PPC_PCI_CHOICE
 799 config PPC_PCI_CHOICE
 800         bool
 801
 802 config PCI
 803         bool "PCI support" if PPC_PCI_CHOICE
 804         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 805                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 806         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 807         select GENERIC_PCI_IOMAP
 808         help
 809           Find out whether your system includes a PCI bus. PCI is the name of
 810           a bus system, i.e. the way the CPU talks to the other stuff inside
 811           your box.  If you say Y here, the kernel will include drivers and
 812           infrastructure code to support PCI bus devices.
 813
 814 config PCI_DOMAINS
 815         def_bool PCI
 816
 817 config PCI_SYSCALL
 818         def_bool PCI
 819
 820 config PCI_QSPAN
 821         bool "QSpan PCI"
 822         depends on !4xx && !CPM2 && 8xx
 823         select PPC_I8259
 824         help
 825           Say Y here if you have a system based on a Motorola 8xx-series
 826           embedded processor with a QSPAN PCI interface, otherwise say N.
 827
 828 config PCI_8260
 829         bool
 830         depends on PCI && 8260
 831         select PPC_INDIRECT_PCI
 832         default y
 833
 834 source "drivers/pci/pcie/Kconfig"
 835
 836 source "drivers/pci/Kconfig"
 837
 838 source "drivers/pcmcia/Kconfig"
 839
 840 source "drivers/pci/hotplug/Kconfig"
 841
 842 config HAS_RAPIDIO
 843         bool
 844         default n
 845
 846 config RAPIDIO
 847         tristate "RapidIO support"
 848         depends on HAS_RAPIDIO || PCI
 849         help
 850           If you say Y here, the kernel will include drivers and
 851           infrastructure code to support RapidIO interconnect devices.
 852
 853 config FSL_RIO
 854         bool "Freescale Embedded SRIO Controller support"
 855         depends on RAPIDIO = y && HAS_RAPIDIO
 856         default "n"
 857         ---help---
 858           Include support for RapidIO controller on Freescale embedded
 859           processors (MPC8548, MPC8641, etc).
 860
 861 source "drivers/rapidio/Kconfig"
 862
 863 endmenu
 864
 865 config NONSTATIC_KERNEL
 866         bool
 867         default n
 868
 869 menu "Advanced setup"
 870         depends on PPC32
 871
 872 config ADVANCED_OPTIONS
 873         bool "Prompt for advanced kernel configuration options"
 874         help
 875           This option will enable prompting for a variety of advanced kernel
 876           configuration options.  These options can cause the kernel to not
 877           work if they are set incorrectly, but can be used to optimize certain
 878           aspects of kernel memory management.
 879
 880           Unless you know what you are doing, say N here.
 881
 882 comment "Default settings for advanced configuration options are used"
 883         depends on !ADVANCED_OPTIONS
 884
 885 config LOWMEM_SIZE_BOOL
 886         bool "Set maximum low memory"
 887         depends on ADVANCED_OPTIONS
 888         help
 889           This option allows you to set the maximum amount of memory which
 890           will be used as "low memory", that is, memory which the kernel can
 891           access directly, without having to set up a kernel virtual mapping.
 892           This can be useful in optimizing the layout of kernel virtual
 893           memory.
 894
 895           Say N here unless you know what you are doing.
 896
 897 config LOWMEM_SIZE
 898         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 899         default "0x30000000"
 900
 901 config LOWMEM_CAM_NUM_BOOL
 902         bool "Set number of CAMs to use to map low memory"
 903         depends on ADVANCED_OPTIONS && FSL_BOOKE
 904         help
 905           This option allows you to set the maximum number of CAM slots that
 906           will be used to map low memory.  There are a limited number of slots
 907           available and even more limited number that will fit in the L1 MMU.
 908           However, using more entries will allow mapping more low memory.  This
 909           can be useful in optimizing the layout of kernel virtual memory.
 910
 911           Say N here unless you know what you are doing.
 912
 913 config LOWMEM_CAM_NUM
 914         depends on FSL_BOOKE
 915         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 916         default 3
 917
 918 config DYNAMIC_MEMSTART
 919         bool "Enable page aligned dynamic load address for kernel"
 920         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 921         select NONSTATIC_KERNEL
 922         help
 923           This option enables the kernel to be loaded at any page aligned
 924           physical address. The kernel creates a mapping from KERNELBASE to
 925           the address where the kernel is loaded. The page size here implies
 926           the TLB page size of the mapping for kernel on the particular platform.
 927           Please refer to the init code for finding the TLB page size.
 928
 929           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 930           kernel image, where the only restriction is the page aligned kernel
 931           load address. When this option is enabled, the compile time physical
 932           address CONFIG_PHYSICAL_START is ignored.
 933
 934           This option is overridden by CONFIG_RELOCATABLE
 935
 936 config RELOCATABLE
 937         bool "Build a relocatable kernel"
 938         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 939         select NONSTATIC_KERNEL
 940         help
 941           This builds a kernel image that is capable of running at the
 942           location the kernel is loaded at, without any alignment restrictions.
 943           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 944
 945           One use is for the kexec on panic case where the recovery kernel
 946           must live at a different physical address than the primary
 947           kernel.
 948
 949           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 950           it has been loaded at and the compile time physical addresses
 951           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 952           setting can still be useful to bootwrappers that need to know the
 953           load address of the kernel (eg. u-boot/mkimage).
 954
 955 config RELOCATABLE_PPC32
 956         def_bool y
 957         depends on PPC32 && RELOCATABLE
 958
 959 config PAGE_OFFSET_BOOL
 960         bool "Set custom page offset address"
 961         depends on ADVANCED_OPTIONS
 962         help
 963           This option allows you to set the kernel virtual address at which
 964           the kernel will map low memory.  This can be useful in optimizing
 965           the virtual memory layout of the system.
 966
 967           Say N here unless you know what you are doing.
 968
 969 config PAGE_OFFSET
 970         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 971         default "0xc0000000"
 972
 973 config KERNEL_START_BOOL
 974         bool "Set custom kernel base address"
 975         depends on ADVANCED_OPTIONS
 976         help
 977           This option allows you to set the kernel virtual address at which
 978           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 979           however there are times (like kdump) that one might not want them
 980           to be the same.
 981
 982           Say N here unless you know what you are doing.
 983
 984 config KERNEL_START
 985         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 986         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 987         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
 988         default "0xc0000000"
 989
 990 config PHYSICAL_START_BOOL
 991         bool "Set physical address where the kernel is loaded"
 992         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 993         help
 994           This gives the physical address where the kernel is loaded.
 995
 996           Say N here unless you know what you are doing.
 997
 998 config PHYSICAL_START
 999         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1000         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1001         default "0x00000000"
1002
1003 config PHYSICAL_ALIGN
1004         hex
1005         default "0x04000000" if FSL_BOOKE
1006         help
1007           This value puts the alignment restrictions on physical address
1008           where kernel is loaded and run from. Kernel is compiled for an
1009           address which meets above alignment restriction.
1010
1011 config TASK_SIZE_BOOL
1012         bool "Set custom user task size"
1013         depends on ADVANCED_OPTIONS
1014         help
1015           This option allows you to set the amount of virtual address space
1016           allocated to user tasks.  This can be useful in optimizing the
1017           virtual memory layout of the system.
1018
1019           Say N here unless you know what you are doing.
1020
1021 config TASK_SIZE
1022         hex "Size of user task space" if TASK_SIZE_BOOL
1023         default "0x80000000" if PPC_8xx
1024         default "0xc0000000"
1025
1026 config CONSISTENT_SIZE_BOOL
1027         bool "Set custom consistent memory pool size"
1028         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1029         help
1030           This option allows you to set the size of the
1031           consistent memory pool.  This pool of virtual memory
1032           is used to make consistent memory allocations.
1033
1034 config CONSISTENT_SIZE
1035         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1036         default "0x00200000" if NOT_COHERENT_CACHE
1037
1038 config PIN_TLB
1039         bool "Pinned Kernel TLBs (860 ONLY)"
1040         depends on ADVANCED_OPTIONS && 8xx
1041 endmenu
1042
1043 if PPC64
1044 config RELOCATABLE
1045         bool "Build a relocatable kernel"
1046         depends on !COMPILE_TEST
1047         select NONSTATIC_KERNEL
1048         help
1049           This builds a kernel image that is capable of running anywhere
1050           in the RMA (real memory area) at any 16k-aligned base address.
1051           The kernel is linked as a position-independent executable (PIE)
1052           and contains dynamic relocations which are processed early
1053           in the bootup process.
1054
1055           One use is for the kexec on panic case where the recovery kernel
1056           must live at a different physical address than the primary
1057           kernel.
1058
1059 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1060 config PAGE_OFFSET
1061         hex
1062         default "0xc000000000000000"
1063 config KERNEL_START
1064         hex
1065         default "0xc000000000000000"
1066 config PHYSICAL_START
1067         hex
1068         default "0x00000000"
1069 endif
1070
1071 config  ARCH_RANDOM
1072         def_bool n
1073
1074 source "net/Kconfig"
1075
1076 source "drivers/Kconfig"
1077
1078 source "fs/Kconfig"
1079
1080 source "lib/Kconfig"
1081
1082 source "arch/powerpc/Kconfig.debug"
1083
1084 source "security/Kconfig"
1085
1086 config KEYS_COMPAT
1087         bool
1088         depends on COMPAT && KEYS
1089         default y
1090
1091 source "crypto/Kconfig"
1092
1093 config PPC_LIB_RHEAP
1094         bool
1095
1096 source "arch/powerpc/kvm/Kconfig"