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 TRACE_IRQFLAGS_SUPPORT
  51         bool
  52         default y
  53
  54 config LOCKDEP_SUPPORT
  55         bool
  56         default y
  57
  58 config RWSEM_GENERIC_SPINLOCK
  59         bool
  60
  61 config RWSEM_XCHGADD_ALGORITHM
  62         bool
  63         default y
  64
  65 config GENERIC_LOCKBREAK
  66         bool
  67         default y
  68         depends on SMP && PREEMPT
  69
  70 config ARCH_HAS_ILOG2_U32
  71         bool
  72         default y
  73
  74 config ARCH_HAS_ILOG2_U64
  75         bool
  76         default y if 64BIT
  77
  78 config GENERIC_HWEIGHT
  79         bool
  80         default y
  81
  82 config ARCH_HAS_DMA_SET_COHERENT_MASK
  83         bool
  84
  85 config PPC
  86         bool
  87         default y
  88         select ARCH_MIGHT_HAVE_PC_PARPORT
  89         select ARCH_MIGHT_HAVE_PC_SERIO
  90         select BINFMT_ELF
  91         select ARCH_HAS_ELF_RANDOMIZE
  92         select OF
  93         select OF_EARLY_FLATTREE
  94         select OF_RESERVED_MEM
  95         select HAVE_FTRACE_MCOUNT_RECORD
  96         select HAVE_DYNAMIC_FTRACE
  97         select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
  98         select HAVE_FUNCTION_TRACER
  99         select HAVE_FUNCTION_GRAPH_TRACER
 100         select SYSCTL_EXCEPTION_TRACE
 101         select ARCH_WANT_OPTIONAL_GPIOLIB
 102         select VIRT_TO_BUS if !PPC64
 103         select HAVE_IDE
 104         select HAVE_IOREMAP_PROT
 105         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
 106         select HAVE_KPROBES
 107         select HAVE_ARCH_KGDB
 108         select HAVE_KRETPROBES
 109         select HAVE_ARCH_TRACEHOOK
 110         select HAVE_MEMBLOCK
 111         select HAVE_MEMBLOCK_NODE_MAP
 112         select HAVE_DMA_API_DEBUG
 113         select HAVE_OPROFILE
 114         select HAVE_DEBUG_KMEMLEAK
 115         select ARCH_HAS_SG_CHAIN
 116         select GENERIC_ATOMIC64 if PPC32
 117         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 118         select HAVE_PERF_EVENTS
 119         select HAVE_REGS_AND_STACK_ACCESS_API
 120         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 121         select ARCH_WANT_IPC_PARSE_VERSION
 122         select SPARSE_IRQ
 123         select IRQ_DOMAIN
 124         select GENERIC_IRQ_SHOW
 125         select GENERIC_IRQ_SHOW_LEVEL
 126         select IRQ_FORCED_THREADING
 127         select HAVE_RCU_TABLE_FREE if SMP
 128         select HAVE_SYSCALL_TRACEPOINTS
 129         select HAVE_BPF_JIT
 130         select HAVE_ARCH_JUMP_LABEL
 131         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 132         select ARCH_HAS_GCOV_PROFILE_ALL
 133         select GENERIC_SMP_IDLE_THREAD
 134         select GENERIC_CMOS_UPDATE
 135         select GENERIC_TIME_VSYSCALL_OLD
 136         select GENERIC_CLOCKEVENTS
 137         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 138         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 139         select GENERIC_STRNCPY_FROM_USER
 140         select GENERIC_STRNLEN_USER
 141         select HAVE_MOD_ARCH_SPECIFIC
 142         select MODULES_USE_ELF_RELA
 143         select CLONE_BACKWARDS
 144         select ARCH_USE_BUILTIN_BSWAP
 145         select OLD_SIGSUSPEND
 146         select OLD_SIGACTION if PPC32
 147         select HAVE_DEBUG_STACKOVERFLOW
 148         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 149         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 150         select HAVE_ARCH_AUDITSYSCALL
 151         select ARCH_SUPPORTS_ATOMIC_RMW
 152         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 153         select NO_BOOTMEM
 154         select HAVE_GENERIC_RCU_GUP
 155         select HAVE_PERF_EVENTS_NMI if PPC64
 156         select EDAC_SUPPORT
 157         select EDAC_ATOMIC_SCRUB
 158         select ARCH_HAS_DMA_SET_COHERENT_MASK
 159         select ARCH_HAS_DEVMEM_IS_ALLOWED
 160         select HAVE_ARCH_SECCOMP_FILTER
 161         select ARCH_HAS_UBSAN_SANITIZE_ALL
 162         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 163
 164 config GENERIC_CSUM
 165         def_bool CPU_LITTLE_ENDIAN
 166
 167 config EARLY_PRINTK
 168         bool
 169         default y
 170
 171 config PANIC_TIMEOUT
 172         int
 173         default 180
 174
 175 config COMPAT
 176         bool
 177         default y if PPC64
 178         select COMPAT_BINFMT_ELF
 179         select ARCH_WANT_OLD_COMPAT_IPC
 180         select COMPAT_OLD_SIGACTION
 181
 182 config SYSVIPC_COMPAT
 183         bool
 184         depends on COMPAT && SYSVIPC
 185         default y
 186
 187 # All PPC32s use generic nvram driver through ppc_md
 188 config GENERIC_NVRAM
 189         bool
 190         default y if PPC32
 191
 192 config SCHED_OMIT_FRAME_POINTER
 193         bool
 194         default y
 195
 196 config ARCH_MAY_HAVE_PC_FDC
 197         bool
 198         default PCI
 199
 200 config PPC_UDBG_16550
 201         bool
 202         default n
 203
 204 config GENERIC_TBSYNC
 205         bool
 206         default y if PPC32 && SMP
 207         default n
 208
 209 config AUDIT_ARCH
 210         bool
 211         default y
 212
 213 config GENERIC_BUG
 214         bool
 215         default y
 216         depends on BUG
 217
 218 config SYS_SUPPORTS_APM_EMULATION
 219         default y if PMAC_APM_EMU
 220         bool
 221
 222 config EPAPR_BOOT
 223         bool
 224         help
 225           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 226         default n
 227
 228 config DEFAULT_UIMAGE
 229         bool
 230         help
 231           Used to allow a board to specify it wants a uImage built by default
 232         default n
 233
 234 config ARCH_HIBERNATION_POSSIBLE
 235         bool
 236         default y
 237
 238 config ARCH_SUSPEND_POSSIBLE
 239         def_bool y
 240         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 241                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 242                    || 44x || 40x
 243
 244 config PPC_DCR_NATIVE
 245         bool
 246         default n
 247
 248 config PPC_DCR_MMIO
 249         bool
 250         default n
 251
 252 config PPC_DCR
 253         bool
 254         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 255         default y
 256
 257 config PPC_OF_PLATFORM_PCI
 258         bool
 259         depends on PCI
 260         depends on PPC64 # not supported on 32 bits yet
 261         default n
 262
 263 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 264         depends on PPC32 || PPC_STD_MMU_64
 265         def_bool y
 266
 267 config ARCH_SUPPORTS_UPROBES
 268         def_bool y
 269
 270 config PPC_ADV_DEBUG_REGS
 271         bool
 272         depends on 40x || BOOKE
 273         default y
 274
 275 config PPC_ADV_DEBUG_IACS
 276         int
 277         depends on PPC_ADV_DEBUG_REGS
 278         default 4 if 44x
 279         default 2
 280
 281 config PPC_ADV_DEBUG_DACS
 282         int
 283         depends on PPC_ADV_DEBUG_REGS
 284         default 2
 285
 286 config PPC_ADV_DEBUG_DVCS
 287         int
 288         depends on PPC_ADV_DEBUG_REGS
 289         default 2 if 44x
 290         default 0
 291
 292 config PPC_ADV_DEBUG_DAC_RANGE
 293         bool
 294         depends on PPC_ADV_DEBUG_REGS && 44x
 295         default y
 296
 297 config PPC_EMULATE_SSTEP
 298         bool
 299         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 300
 301 config ZONE_DMA32
 302         bool
 303         default y if PPC64
 304
 305 config PGTABLE_LEVELS
 306         int
 307         default 2 if !PPC64
 308         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 309         default 4
 310
 311 source "init/Kconfig"
 312
 313 source "kernel/Kconfig.freezer"
 314
 315 source "arch/powerpc/sysdev/Kconfig"
 316 source "arch/powerpc/platforms/Kconfig"
 317
 318 menu "Kernel options"
 319
 320 config HIGHMEM
 321         bool "High memory support"
 322         depends on PPC32
 323
 324 source kernel/Kconfig.hz
 325 source kernel/Kconfig.preempt
 326 source "fs/Kconfig.binfmt"
 327
 328 config HUGETLB_PAGE_SIZE_VARIABLE
 329         bool
 330         depends on HUGETLB_PAGE
 331         default y
 332
 333 config MATH_EMULATION
 334         bool "Math emulation"
 335         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 336         ---help---
 337           Some PowerPC chips designed for embedded applications do not have
 338           a floating-point unit and therefore do not implement the
 339           floating-point instructions in the PowerPC instruction set.  If you
 340           say Y here, the kernel will include code to emulate a floating-point
 341           unit, which will allow programs that use floating-point
 342           instructions to run.
 343
 344           This is also useful to emulate missing (optional) instructions
 345           such as fsqrt on cores that do have an FPU but do not implement
 346           them (such as Freescale BookE).
 347
 348 choice
 349         prompt "Math emulation options"
 350         default MATH_EMULATION_FULL
 351         depends on MATH_EMULATION
 352
 353 config  MATH_EMULATION_FULL
 354         bool "Emulate all the floating point instructions"
 355         ---help---
 356           Select this option will enable the kernel to support to emulate
 357           all the floating point instructions. If your SoC doesn't have
 358           a FPU, you should select this.
 359
 360 config MATH_EMULATION_HW_UNIMPLEMENTED
 361         bool "Just emulate the FPU unimplemented instructions"
 362         ---help---
 363           Select this if you know there does have a hardware FPU on your
 364           SoC, but some floating point instructions are not implemented by that.
 365
 366 endchoice
 367
 368 config PPC_TRANSACTIONAL_MEM
 369        bool "Transactional Memory support for POWERPC"
 370        depends on PPC_BOOK3S_64
 371        depends on SMP
 372        select ALTIVEC
 373        select VSX
 374        default n
 375        ---help---
 376          Support user-mode Transactional Memory on POWERPC.
 377
 378 config DISABLE_MPROFILE_KERNEL
 379         bool "Disable use of mprofile-kernel for kernel tracing"
 380         depends on PPC64 && CPU_LITTLE_ENDIAN
 381         default y
 382         help
 383           Selecting this options disables use of the mprofile-kernel ABI for
 384           kernel tracing. That will cause options such as live patching
 385           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 386           be disabled also.
 387
 388           If you have a toolchain which supports mprofile-kernel, then you can
 389           enable this. Otherwise leave it disabled. If you're not sure, say
 390           "N".
 391
 392 config MPROFILE_KERNEL
 393         depends on PPC64 && CPU_LITTLE_ENDIAN
 394         def_bool !DISABLE_MPROFILE_KERNEL
 395
 396 config IOMMU_HELPER
 397         def_bool PPC64
 398
 399 config SWIOTLB
 400         bool "SWIOTLB support"
 401         default n
 402         select IOMMU_HELPER
 403         ---help---
 404           Support for IO bounce buffering for systems without an IOMMU.
 405           This allows us to DMA to the full physical address space on
 406           platforms where the size of a physical address is larger
 407           than the bus address.  Not all platforms support this.
 408
 409 config HOTPLUG_CPU
 410         bool "Support for enabling/disabling CPUs"
 411         depends on SMP && (PPC_PSERIES || \
 412         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 413         ---help---
 414           Say Y here to be able to disable and re-enable individual
 415           CPUs at runtime on SMP machines.
 416
 417           Say N if you are unsure.
 418
 419 config ARCH_CPU_PROBE_RELEASE
 420         def_bool y
 421         depends on HOTPLUG_CPU
 422
 423 config ARCH_ENABLE_MEMORY_HOTPLUG
 424         def_bool y
 425
 426 config ARCH_HAS_WALK_MEMORY
 427         def_bool y
 428
 429 config ARCH_ENABLE_MEMORY_HOTREMOVE
 430         def_bool y
 431
 432 config PPC64_SUPPORTS_MEMORY_FAILURE
 433         bool "Add support for memory hwpoison"
 434         depends on PPC_BOOK3S_64
 435         default "y" if PPC_POWERNV
 436         select ARCH_SUPPORTS_MEMORY_FAILURE
 437
 438 config KEXEC
 439         bool "kexec system call"
 440         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 441         select KEXEC_CORE
 442         help
 443           kexec is a system call that implements the ability to shutdown your
 444           current kernel, and to start another kernel.  It is like a reboot
 445           but it is independent of the system firmware.   And like a reboot
 446           you can start any kernel with it, not just Linux.
 447
 448           The name comes from the similarity to the exec system call.
 449
 450           It is an ongoing process to be certain the hardware in a machine
 451           is properly shutdown, so do not be surprised if this code does not
 452           initially work for you.  As of this writing the exact hardware
 453           interface is strongly in flux, so no good recommendation can be
 454           made.
 455
 456 config CRASH_DUMP
 457         bool "Build a kdump crash kernel"
 458         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 459         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 460         help
 461           Build a kernel suitable for use as a kdump capture kernel.
 462           The same kernel binary can be used as production kernel and dump
 463           capture kernel.
 464
 465 config FA_DUMP
 466         bool "Firmware-assisted dump"
 467         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 468         help
 469           A robust mechanism to get reliable kernel crash dump with
 470           assistance from firmware. This approach does not use kexec,
 471           instead firmware assists in booting the kdump kernel
 472           while preserving memory contents. Firmware-assisted dump
 473           is meant to be a kdump replacement offering robustness and
 474           speed not possible without system firmware assistance.
 475
 476           If unsure, say "N"
 477
 478 config IRQ_ALL_CPUS
 479         bool "Distribute interrupts on all CPUs by default"
 480         depends on SMP
 481         help
 482           This option gives the kernel permission to distribute IRQs across
 483           multiple CPUs.  Saying N here will route all IRQs to the first
 484           CPU.  Generally saying Y is safe, although some problems have been
 485           reported with SMP Power Macintoshes with this option enabled.
 486
 487 config NUMA
 488         bool "NUMA support"
 489         depends on PPC64
 490         default y if SMP && PPC_PSERIES
 491
 492 config NODES_SHIFT
 493         int
 494         default "8" if PPC64
 495         default "4"
 496         depends on NEED_MULTIPLE_NODES
 497
 498 config USE_PERCPU_NUMA_NODE_ID
 499         def_bool y
 500         depends on NUMA
 501
 502 config HAVE_MEMORYLESS_NODES
 503         def_bool y
 504         depends on NUMA
 505
 506 config ARCH_SELECT_MEMORY_MODEL
 507         def_bool y
 508         depends on PPC64
 509
 510 config ARCH_FLATMEM_ENABLE
 511         def_bool y
 512         depends on (PPC64 && !NUMA) || PPC32
 513
 514 config ARCH_SPARSEMEM_ENABLE
 515         def_bool y
 516         depends on PPC64
 517         select SPARSEMEM_VMEMMAP_ENABLE
 518
 519 config ARCH_SPARSEMEM_DEFAULT
 520         def_bool y
 521         depends on (SMP && PPC_PSERIES) || PPC_PS3
 522
 523 config SYS_SUPPORTS_HUGETLBFS
 524         bool
 525
 526 source "mm/Kconfig"
 527
 528 config ARCH_MEMORY_PROBE
 529         def_bool y
 530         depends on MEMORY_HOTPLUG
 531
 532 # Some NUMA nodes have memory ranges that span
 533 # other nodes.  Even though a pfn is valid and
 534 # between a node's start and end pfns, it may not
 535 # reside on that node.  See memmap_init_zone()
 536 # for details.
 537 config NODES_SPAN_OTHER_NODES
 538         def_bool y
 539         depends on NEED_MULTIPLE_NODES
 540
 541 config STDBINUTILS
 542         bool "Using standard binutils settings"
 543         depends on 44x
 544         default y
 545         help
 546           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 547           Note, that kernel will be able to run only those applications,
 548           which had been compiled using binutils later than 2.17.50.0.3 with
 549           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 550           the older binutils, you can patch them with a trivial patch, which
 551           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 552
 553 choice
 554         prompt "Page size"
 555         default PPC_4K_PAGES
 556         help
 557           Select the kernel logical page size. Increasing the page size
 558           will reduce software overhead at each page boundary, allow
 559           hardware prefetch mechanisms to be more effective, and allow
 560           larger dma transfers increasing IO efficiency and reducing
 561           overhead. However the utilization of memory will increase.
 562           For example, each cached file will using a multiple of the
 563           page size to hold its contents and the difference between the
 564           end of file and the end of page is wasted.
 565
 566           Some dedicated systems, such as software raid serving with
 567           accelerated calculations, have shown significant increases.
 568
 569           If you configure a 64 bit kernel for 64k pages but the
 570           processor does not support them, then the kernel will simulate
 571           them with 4k pages, loading them on demand, but with the
 572           reduced software overhead and larger internal fragmentation.
 573           For the 32 bit kernel, a large page option will not be offered
 574           unless it is supported by the configured processor.
 575
 576           If unsure, choose 4K_PAGES.
 577
 578 config PPC_4K_PAGES
 579         bool "4k page size"
 580         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 581
 582 config PPC_16K_PAGES
 583         bool "16k page size"
 584         depends on 44x || PPC_8xx
 585
 586 config PPC_64K_PAGES
 587         bool "64k page size"
 588         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 589         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 590
 591 config PPC_256K_PAGES
 592         bool "256k page size"
 593         depends on 44x && !STDBINUTILS
 594         help
 595           Make the page size 256k.
 596
 597           As the ELF standard only requires alignment to support page
 598           sizes up to 64k, you will need to compile all of your user
 599           space applications with a non-standard binutils settings
 600           (see the STDBINUTILS description for details).
 601
 602           Say N unless you know what you are doing.
 603
 604 endchoice
 605
 606 config FORCE_MAX_ZONEORDER
 607         int "Maximum zone order"
 608         range 9 64 if PPC64 && PPC_64K_PAGES
 609         default "9" if PPC64 && PPC_64K_PAGES
 610         range 13 64 if PPC64 && !PPC_64K_PAGES
 611         default "13" if PPC64 && !PPC_64K_PAGES
 612         range 9 64 if PPC32 && PPC_16K_PAGES
 613         default "9" if PPC32 && PPC_16K_PAGES
 614         range 7 64 if PPC32 && PPC_64K_PAGES
 615         default "7" if PPC32 && PPC_64K_PAGES
 616         range 5 64 if PPC32 && PPC_256K_PAGES
 617         default "5" if PPC32 && PPC_256K_PAGES
 618         range 11 64
 619         default "11"
 620         help
 621           The kernel memory allocator divides physically contiguous memory
 622           blocks into "zones", where each zone is a power of two number of
 623           pages.  This option selects the largest power of two that the kernel
 624           keeps in the memory allocator.  If you need to allocate very large
 625           blocks of physically contiguous memory, then you may need to
 626           increase this value.
 627
 628           This config option is actually maximum order plus one. For example,
 629           a value of 11 means that the largest free memory block is 2^10 pages.
 630
 631           The page size is not necessarily 4KB.  For example, on 64-bit
 632           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 633           this in mind when choosing a value for this option.
 634
 635 config PPC_SUBPAGE_PROT
 636         bool "Support setting protections for 4k subpages"
 637         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 638         help
 639           This option adds support for a system call to allow user programs
 640           to set access permissions (read/write, readonly, or no access)
 641           on the 4k subpages of each 64k page.
 642
 643 config PPC_COPRO_BASE
 644         bool
 645         default n
 646
 647 config SCHED_SMT
 648         bool "SMT (Hyperthreading) scheduler support"
 649         depends on PPC64 && SMP
 650         help
 651           SMT scheduler support improves the CPU scheduler's decision making
 652           when dealing with POWER5 cpus at a cost of slightly increased
 653           overhead in some places. If unsure say N here.
 654
 655 config PPC_DENORMALISATION
 656         bool "PowerPC denormalisation exception handling"
 657         depends on PPC_BOOK3S_64
 658         default "y" if PPC_POWERNV
 659         ---help---
 660           Add support for handling denormalisation of single precision
 661           values.  Useful for bare metal only.  If unsure say Y here.
 662
 663 config CMDLINE_BOOL
 664         bool "Default bootloader kernel arguments"
 665
 666 config CMDLINE
 667         string "Initial kernel command string"
 668         depends on CMDLINE_BOOL
 669         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 670         help
 671           On some platforms, there is currently no way for the boot loader to
 672           pass arguments to the kernel. For these platforms, you can supply
 673           some command-line options at build time by entering them here.  In
 674           most cases you will need to specify the root device here.
 675
 676 config CMDLINE_FORCE
 677         bool "Always use the default kernel command string"
 678         depends on CMDLINE_BOOL
 679         help
 680           Always use the default kernel command string, even if the boot
 681           loader passes other arguments to the kernel.
 682           This is useful if you cannot or don't want to change the
 683           command-line options your boot loader passes to the kernel.
 684
 685 config EXTRA_TARGETS
 686         string "Additional default image types"
 687         help
 688           List additional targets to be built by the bootwrapper here (separated
 689           by spaces).  This is useful for targets that depend of device tree
 690           files in the .dts directory.
 691
 692           Targets in this list will be build as part of the default build
 693           target, or when the user does a 'make zImage' or a
 694           'make zImage.initrd'.
 695
 696           If unsure, leave blank
 697
 698 config ARCH_WANTS_FREEZER_CONTROL
 699         def_bool y
 700         depends on ADB_PMU
 701
 702 source kernel/power/Kconfig
 703
 704 config SECCOMP
 705         bool "Enable seccomp to safely compute untrusted bytecode"
 706         depends on PROC_FS
 707         default y
 708         help
 709           This kernel feature is useful for number crunching applications
 710           that may need to compute untrusted bytecode during their
 711           execution. By using pipes or other transports made available to
 712           the process as file descriptors supporting the read/write
 713           syscalls, it's possible to isolate those applications in
 714           their own address space using seccomp. Once seccomp is
 715           enabled via /proc/<pid>/seccomp, it cannot be disabled
 716           and the task is only allowed to execute a few safe syscalls
 717           defined by each seccomp mode.
 718
 719           If unsure, say Y. Only embedded should say N here.
 720
 721 endmenu
 722
 723 config ISA_DMA_API
 724         bool
 725         default PCI
 726
 727 menu "Bus options"
 728
 729 config ISA
 730         bool "Support for ISA-bus hardware"
 731         depends on PPC_CHRP
 732         select PPC_I8259
 733         help
 734           Find out whether you have ISA slots on your motherboard.  ISA is the
 735           name of a bus system, i.e. the way the CPU talks to the other stuff
 736           inside your box.  If you have an Apple machine, say N here; if you
 737           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 738           embedded board, consult your board documentation.
 739
 740 config ZONE_DMA
 741         bool
 742         default y
 743
 744 config NEED_DMA_MAP_STATE
 745         def_bool (PPC64 || NOT_COHERENT_CACHE)
 746
 747 config NEED_SG_DMA_LENGTH
 748         def_bool y
 749
 750 config GENERIC_ISA_DMA
 751         bool
 752         depends on ISA_DMA_API
 753         default y
 754
 755 config PPC_INDIRECT_PCI
 756         bool
 757         depends on PCI
 758         default y if 40x || 44x
 759         default n
 760
 761 config EISA
 762         bool
 763
 764 config SBUS
 765         bool
 766
 767 config FSL_SOC
 768         bool
 769
 770 config FSL_PCI
 771         bool
 772         select PPC_INDIRECT_PCI
 773         select PCI_QUIRKS
 774
 775 config FSL_PMC
 776         bool
 777         default y
 778         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 779         help
 780           Freescale MPC85xx/MPC86xx power management controller support
 781           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 782
 783 config PPC4xx_CPM
 784         bool
 785         default y
 786         depends on SUSPEND && (44x || 40x)
 787         help
 788           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 789           It also enables support for two different idle states (idle-wait
 790           and idle-doze).
 791
 792 config 4xx_SOC
 793         bool
 794
 795 config FSL_LBC
 796         bool "Freescale Local Bus support"
 797         depends on FSL_SOC
 798         help
 799           Enables reporting of errors from the Freescale local bus
 800           controller.  Also contains some common code used by
 801           drivers for specific local bus peripherals.
 802
 803 config FSL_GTM
 804         bool
 805         depends on PPC_83xx || QUICC_ENGINE || CPM2
 806         help
 807           Freescale General-purpose Timers support
 808
 809 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 810 config MCA
 811         bool
 812
 813 # Platforms that what PCI turned unconditionally just do select PCI
 814 # in their config node.  Platforms that want to choose at config
 815 # time should select PPC_PCI_CHOICE
 816 config PPC_PCI_CHOICE
 817         bool
 818
 819 config PCI
 820         bool "PCI support" if PPC_PCI_CHOICE
 821         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 822                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 823         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 824         select GENERIC_PCI_IOMAP
 825         help
 826           Find out whether your system includes a PCI bus. PCI is the name of
 827           a bus system, i.e. the way the CPU talks to the other stuff inside
 828           your box.  If you say Y here, the kernel will include drivers and
 829           infrastructure code to support PCI bus devices.
 830
 831 config PCI_DOMAINS
 832         def_bool PCI
 833
 834 config PCI_SYSCALL
 835         def_bool PCI
 836
 837 config PCI_QSPAN
 838         bool "QSpan PCI"
 839         depends on !4xx && !CPM2 && 8xx
 840         select PPC_I8259
 841         help
 842           Say Y here if you have a system based on a Motorola 8xx-series
 843           embedded processor with a QSPAN PCI interface, otherwise say N.
 844
 845 config PCI_8260
 846         bool
 847         depends on PCI && 8260
 848         select PPC_INDIRECT_PCI
 849         default y
 850
 851 source "drivers/pci/Kconfig"
 852
 853 source "drivers/pcmcia/Kconfig"
 854
 855 config HAS_RAPIDIO
 856         bool
 857         default n
 858
 859 config RAPIDIO
 860         tristate "RapidIO support"
 861         depends on HAS_RAPIDIO || PCI
 862         help
 863           If you say Y here, the kernel will include drivers and
 864           infrastructure code to support RapidIO interconnect devices.
 865
 866 config FSL_RIO
 867         bool "Freescale Embedded SRIO Controller support"
 868         depends on RAPIDIO = y && HAS_RAPIDIO
 869         default "n"
 870         ---help---
 871           Include support for RapidIO controller on Freescale embedded
 872           processors (MPC8548, MPC8641, etc).
 873
 874 source "drivers/rapidio/Kconfig"
 875
 876 endmenu
 877
 878 config NONSTATIC_KERNEL
 879         bool
 880         default n
 881
 882 menu "Advanced setup"
 883         depends on PPC32
 884
 885 config ADVANCED_OPTIONS
 886         bool "Prompt for advanced kernel configuration options"
 887         help
 888           This option will enable prompting for a variety of advanced kernel
 889           configuration options.  These options can cause the kernel to not
 890           work if they are set incorrectly, but can be used to optimize certain
 891           aspects of kernel memory management.
 892
 893           Unless you know what you are doing, say N here.
 894
 895 comment "Default settings for advanced configuration options are used"
 896         depends on !ADVANCED_OPTIONS
 897
 898 config LOWMEM_SIZE_BOOL
 899         bool "Set maximum low memory"
 900         depends on ADVANCED_OPTIONS
 901         help
 902           This option allows you to set the maximum amount of memory which
 903           will be used as "low memory", that is, memory which the kernel can
 904           access directly, without having to set up a kernel virtual mapping.
 905           This can be useful in optimizing the layout of kernel virtual
 906           memory.
 907
 908           Say N here unless you know what you are doing.
 909
 910 config LOWMEM_SIZE
 911         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 912         default "0x30000000"
 913
 914 config LOWMEM_CAM_NUM_BOOL
 915         bool "Set number of CAMs to use to map low memory"
 916         depends on ADVANCED_OPTIONS && FSL_BOOKE
 917         help
 918           This option allows you to set the maximum number of CAM slots that
 919           will be used to map low memory.  There are a limited number of slots
 920           available and even more limited number that will fit in the L1 MMU.
 921           However, using more entries will allow mapping more low memory.  This
 922           can be useful in optimizing the layout of kernel virtual memory.
 923
 924           Say N here unless you know what you are doing.
 925
 926 config LOWMEM_CAM_NUM
 927         depends on FSL_BOOKE
 928         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 929         default 3
 930
 931 config DYNAMIC_MEMSTART
 932         bool "Enable page aligned dynamic load address for kernel"
 933         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 934         select NONSTATIC_KERNEL
 935         help
 936           This option enables the kernel to be loaded at any page aligned
 937           physical address. The kernel creates a mapping from KERNELBASE to
 938           the address where the kernel is loaded. The page size here implies
 939           the TLB page size of the mapping for kernel on the particular platform.
 940           Please refer to the init code for finding the TLB page size.
 941
 942           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 943           kernel image, where the only restriction is the page aligned kernel
 944           load address. When this option is enabled, the compile time physical
 945           address CONFIG_PHYSICAL_START is ignored.
 946
 947           This option is overridden by CONFIG_RELOCATABLE
 948
 949 config RELOCATABLE
 950         bool "Build a relocatable kernel"
 951         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 952         select NONSTATIC_KERNEL
 953         help
 954           This builds a kernel image that is capable of running at the
 955           location the kernel is loaded at, without any alignment restrictions.
 956           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 957
 958           One use is for the kexec on panic case where the recovery kernel
 959           must live at a different physical address than the primary
 960           kernel.
 961
 962           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 963           it has been loaded at and the compile time physical addresses
 964           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 965           setting can still be useful to bootwrappers that need to know the
 966           load address of the kernel (eg. u-boot/mkimage).
 967
 968 config RELOCATABLE_PPC32
 969         def_bool y
 970         depends on PPC32 && RELOCATABLE
 971
 972 config PAGE_OFFSET_BOOL
 973         bool "Set custom page offset address"
 974         depends on ADVANCED_OPTIONS
 975         help
 976           This option allows you to set the kernel virtual address at which
 977           the kernel will map low memory.  This can be useful in optimizing
 978           the virtual memory layout of the system.
 979
 980           Say N here unless you know what you are doing.
 981
 982 config PAGE_OFFSET
 983         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 984         default "0xc0000000"
 985
 986 config KERNEL_START_BOOL
 987         bool "Set custom kernel base address"
 988         depends on ADVANCED_OPTIONS
 989         help
 990           This option allows you to set the kernel virtual address at which
 991           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 992           however there are times (like kdump) that one might not want them
 993           to be the same.
 994
 995           Say N here unless you know what you are doing.
 996
 997 config KERNEL_START
 998         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 999         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1000         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1001         default "0xc0000000"
1002
1003 config PHYSICAL_START_BOOL
1004         bool "Set physical address where the kernel is loaded"
1005         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1006         help
1007           This gives the physical address where the kernel is loaded.
1008
1009           Say N here unless you know what you are doing.
1010
1011 config PHYSICAL_START
1012         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1013         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1014         default "0x00000000"
1015
1016 config PHYSICAL_ALIGN
1017         hex
1018         default "0x04000000" if FSL_BOOKE
1019         help
1020           This value puts the alignment restrictions on physical address
1021           where kernel is loaded and run from. Kernel is compiled for an
1022           address which meets above alignment restriction.
1023
1024 config TASK_SIZE_BOOL
1025         bool "Set custom user task size"
1026         depends on ADVANCED_OPTIONS
1027         help
1028           This option allows you to set the amount of virtual address space
1029           allocated to user tasks.  This can be useful in optimizing the
1030           virtual memory layout of the system.
1031
1032           Say N here unless you know what you are doing.
1033
1034 config TASK_SIZE
1035         hex "Size of user task space" if TASK_SIZE_BOOL
1036         default "0x80000000" if PPC_8xx
1037         default "0xc0000000"
1038
1039 config CONSISTENT_SIZE_BOOL
1040         bool "Set custom consistent memory pool size"
1041         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1042         help
1043           This option allows you to set the size of the
1044           consistent memory pool.  This pool of virtual memory
1045           is used to make consistent memory allocations.
1046
1047 config CONSISTENT_SIZE
1048         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1049         default "0x00200000" if NOT_COHERENT_CACHE
1050
1051 config PIN_TLB
1052         bool "Pinned Kernel TLBs (860 ONLY)"
1053         depends on ADVANCED_OPTIONS && 8xx
1054 endmenu
1055
1056 if PPC64
1057 config RELOCATABLE
1058         bool "Build a relocatable kernel"
1059         depends on !COMPILE_TEST
1060         select NONSTATIC_KERNEL
1061         help
1062           This builds a kernel image that is capable of running anywhere
1063           in the RMA (real memory area) at any 16k-aligned base address.
1064           The kernel is linked as a position-independent executable (PIE)
1065           and contains dynamic relocations which are processed early
1066           in the bootup process.
1067
1068           One use is for the kexec on panic case where the recovery kernel
1069           must live at a different physical address than the primary
1070           kernel.
1071
1072 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1073 config PAGE_OFFSET
1074         hex
1075         default "0xc000000000000000"
1076 config KERNEL_START
1077         hex
1078         default "0xc000000000000000"
1079 config PHYSICAL_START
1080         hex
1081         default "0x00000000"
1082 endif
1083
1084 config  ARCH_RANDOM
1085         def_bool n
1086
1087 source "net/Kconfig"
1088
1089 source "drivers/Kconfig"
1090
1091 source "fs/Kconfig"
1092
1093 source "lib/Kconfig"
1094
1095 source "arch/powerpc/Kconfig.debug"
1096
1097 source "security/Kconfig"
1098
1099 config KEYS_COMPAT
1100         bool
1101         depends on COMPAT && KEYS
1102         default y
1103
1104 source "crypto/Kconfig"
1105
1106 config PPC_LIB_RHEAP
1107         bool
1108
1109 source "arch/powerpc/kvm/Kconfig"