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_CBPF_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         select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
 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 && !PPC_BOOK3S_64
 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 DISABLE_MPROFILE_KERNEL
 380         bool "Disable use of mprofile-kernel for kernel tracing"
 381         depends on PPC64 && CPU_LITTLE_ENDIAN
 382         default y
 383         help
 384           Selecting this options disables use of the mprofile-kernel ABI for
 385           kernel tracing. That will cause options such as live patching
 386           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 387           be disabled also.
 388
 389           If you have a toolchain which supports mprofile-kernel, then you can
 390           enable this. Otherwise leave it disabled. If you're not sure, say
 391           "N".
 392
 393 config MPROFILE_KERNEL
 394         depends on PPC64 && CPU_LITTLE_ENDIAN
 395         def_bool !DISABLE_MPROFILE_KERNEL
 396
 397 config IOMMU_HELPER
 398         def_bool PPC64
 399
 400 config SWIOTLB
 401         bool "SWIOTLB support"
 402         default n
 403         select IOMMU_HELPER
 404         ---help---
 405           Support for IO bounce buffering for systems without an IOMMU.
 406           This allows us to DMA to the full physical address space on
 407           platforms where the size of a physical address is larger
 408           than the bus address.  Not all platforms support this.
 409
 410 config HOTPLUG_CPU
 411         bool "Support for enabling/disabling CPUs"
 412         depends on SMP && (PPC_PSERIES || \
 413         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 414         ---help---
 415           Say Y here to be able to disable and re-enable individual
 416           CPUs at runtime on SMP machines.
 417
 418           Say N if you are unsure.
 419
 420 config ARCH_CPU_PROBE_RELEASE
 421         def_bool y
 422         depends on HOTPLUG_CPU
 423
 424 config ARCH_ENABLE_MEMORY_HOTPLUG
 425         def_bool y
 426
 427 config ARCH_HAS_WALK_MEMORY
 428         def_bool y
 429
 430 config ARCH_ENABLE_MEMORY_HOTREMOVE
 431         def_bool y
 432
 433 config PPC64_SUPPORTS_MEMORY_FAILURE
 434         bool "Add support for memory hwpoison"
 435         depends on PPC_BOOK3S_64
 436         default "y" if PPC_POWERNV
 437         select ARCH_SUPPORTS_MEMORY_FAILURE
 438
 439 config KEXEC
 440         bool "kexec system call"
 441         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 442         select KEXEC_CORE
 443         help
 444           kexec is a system call that implements the ability to shutdown your
 445           current kernel, and to start another kernel.  It is like a reboot
 446           but it is independent of the system firmware.   And like a reboot
 447           you can start any kernel with it, not just Linux.
 448
 449           The name comes from the similarity to the exec system call.
 450
 451           It is an ongoing process to be certain the hardware in a machine
 452           is properly shutdown, so do not be surprised if this code does not
 453           initially work for you.  As of this writing the exact hardware
 454           interface is strongly in flux, so no good recommendation can be
 455           made.
 456
 457 config CRASH_DUMP
 458         bool "Build a kdump crash kernel"
 459         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 460         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 461         help
 462           Build a kernel suitable for use as a kdump capture kernel.
 463           The same kernel binary can be used as production kernel and dump
 464           capture kernel.
 465
 466 config FA_DUMP
 467         bool "Firmware-assisted dump"
 468         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 469         help
 470           A robust mechanism to get reliable kernel crash dump with
 471           assistance from firmware. This approach does not use kexec,
 472           instead firmware assists in booting the kdump kernel
 473           while preserving memory contents. Firmware-assisted dump
 474           is meant to be a kdump replacement offering robustness and
 475           speed not possible without system firmware assistance.
 476
 477           If unsure, say "N"
 478
 479 config IRQ_ALL_CPUS
 480         bool "Distribute interrupts on all CPUs by default"
 481         depends on SMP
 482         help
 483           This option gives the kernel permission to distribute IRQs across
 484           multiple CPUs.  Saying N here will route all IRQs to the first
 485           CPU.  Generally saying Y is safe, although some problems have been
 486           reported with SMP Power Macintoshes with this option enabled.
 487
 488 config NUMA
 489         bool "NUMA support"
 490         depends on PPC64
 491         default y if SMP && PPC_PSERIES
 492
 493 config NODES_SHIFT
 494         int
 495         default "8" if PPC64
 496         default "4"
 497         depends on NEED_MULTIPLE_NODES
 498
 499 config USE_PERCPU_NUMA_NODE_ID
 500         def_bool y
 501         depends on NUMA
 502
 503 config HAVE_MEMORYLESS_NODES
 504         def_bool y
 505         depends on NUMA
 506
 507 config ARCH_SELECT_MEMORY_MODEL
 508         def_bool y
 509         depends on PPC64
 510
 511 config ARCH_FLATMEM_ENABLE
 512         def_bool y
 513         depends on (PPC64 && !NUMA) || PPC32
 514
 515 config ARCH_SPARSEMEM_ENABLE
 516         def_bool y
 517         depends on PPC64
 518         select SPARSEMEM_VMEMMAP_ENABLE
 519
 520 config ARCH_SPARSEMEM_DEFAULT
 521         def_bool y
 522         depends on (SMP && PPC_PSERIES) || PPC_PS3
 523
 524 config SYS_SUPPORTS_HUGETLBFS
 525         bool
 526
 527 source "mm/Kconfig"
 528
 529 config ARCH_MEMORY_PROBE
 530         def_bool y
 531         depends on MEMORY_HOTPLUG
 532
 533 # Some NUMA nodes have memory ranges that span
 534 # other nodes.  Even though a pfn is valid and
 535 # between a node's start and end pfns, it may not
 536 # reside on that node.  See memmap_init_zone()
 537 # for details.
 538 config NODES_SPAN_OTHER_NODES
 539         def_bool y
 540         depends on NEED_MULTIPLE_NODES
 541
 542 config STDBINUTILS
 543         bool "Using standard binutils settings"
 544         depends on 44x
 545         default y
 546         help
 547           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 548           Note, that kernel will be able to run only those applications,
 549           which had been compiled using binutils later than 2.17.50.0.3 with
 550           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 551           the older binutils, you can patch them with a trivial patch, which
 552           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 553
 554 choice
 555         prompt "Page size"
 556         default PPC_4K_PAGES
 557         help
 558           Select the kernel logical page size. Increasing the page size
 559           will reduce software overhead at each page boundary, allow
 560           hardware prefetch mechanisms to be more effective, and allow
 561           larger dma transfers increasing IO efficiency and reducing
 562           overhead. However the utilization of memory will increase.
 563           For example, each cached file will using a multiple of the
 564           page size to hold its contents and the difference between the
 565           end of file and the end of page is wasted.
 566
 567           Some dedicated systems, such as software raid serving with
 568           accelerated calculations, have shown significant increases.
 569
 570           If you configure a 64 bit kernel for 64k pages but the
 571           processor does not support them, then the kernel will simulate
 572           them with 4k pages, loading them on demand, but with the
 573           reduced software overhead and larger internal fragmentation.
 574           For the 32 bit kernel, a large page option will not be offered
 575           unless it is supported by the configured processor.
 576
 577           If unsure, choose 4K_PAGES.
 578
 579 config PPC_4K_PAGES
 580         bool "4k page size"
 581         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 582
 583 config PPC_16K_PAGES
 584         bool "16k page size"
 585         depends on 44x || PPC_8xx
 586
 587 config PPC_64K_PAGES
 588         bool "64k page size"
 589         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 590         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 591
 592 config PPC_256K_PAGES
 593         bool "256k page size"
 594         depends on 44x && !STDBINUTILS
 595         help
 596           Make the page size 256k.
 597
 598           As the ELF standard only requires alignment to support page
 599           sizes up to 64k, you will need to compile all of your user
 600           space applications with a non-standard binutils settings
 601           (see the STDBINUTILS description for details).
 602
 603           Say N unless you know what you are doing.
 604
 605 endchoice
 606
 607 config FORCE_MAX_ZONEORDER
 608         int "Maximum zone order"
 609         range 9 64 if PPC64 && PPC_64K_PAGES
 610         default "9" if PPC64 && PPC_64K_PAGES
 611         range 13 64 if PPC64 && !PPC_64K_PAGES
 612         default "13" if PPC64 && !PPC_64K_PAGES
 613         range 9 64 if PPC32 && PPC_16K_PAGES
 614         default "9" if PPC32 && PPC_16K_PAGES
 615         range 7 64 if PPC32 && PPC_64K_PAGES
 616         default "7" if PPC32 && PPC_64K_PAGES
 617         range 5 64 if PPC32 && PPC_256K_PAGES
 618         default "5" if PPC32 && PPC_256K_PAGES
 619         range 11 64
 620         default "11"
 621         help
 622           The kernel memory allocator divides physically contiguous memory
 623           blocks into "zones", where each zone is a power of two number of
 624           pages.  This option selects the largest power of two that the kernel
 625           keeps in the memory allocator.  If you need to allocate very large
 626           blocks of physically contiguous memory, then you may need to
 627           increase this value.
 628
 629           This config option is actually maximum order plus one. For example,
 630           a value of 11 means that the largest free memory block is 2^10 pages.
 631
 632           The page size is not necessarily 4KB.  For example, on 64-bit
 633           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 634           this in mind when choosing a value for this option.
 635
 636 config PPC_SUBPAGE_PROT
 637         bool "Support setting protections for 4k subpages"
 638         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 639         help
 640           This option adds support for a system call to allow user programs
 641           to set access permissions (read/write, readonly, or no access)
 642           on the 4k subpages of each 64k page.
 643
 644 config PPC_COPRO_BASE
 645         bool
 646         default n
 647
 648 config SCHED_SMT
 649         bool "SMT (Hyperthreading) scheduler support"
 650         depends on PPC64 && SMP
 651         help
 652           SMT scheduler support improves the CPU scheduler's decision making
 653           when dealing with POWER5 cpus at a cost of slightly increased
 654           overhead in some places. If unsure say N here.
 655
 656 config PPC_DENORMALISATION
 657         bool "PowerPC denormalisation exception handling"
 658         depends on PPC_BOOK3S_64
 659         default "y" if PPC_POWERNV
 660         ---help---
 661           Add support for handling denormalisation of single precision
 662           values.  Useful for bare metal only.  If unsure say Y here.
 663
 664 config CMDLINE_BOOL
 665         bool "Default bootloader kernel arguments"
 666
 667 config CMDLINE
 668         string "Initial kernel command string"
 669         depends on CMDLINE_BOOL
 670         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 671         help
 672           On some platforms, there is currently no way for the boot loader to
 673           pass arguments to the kernel. For these platforms, you can supply
 674           some command-line options at build time by entering them here.  In
 675           most cases you will need to specify the root device here.
 676
 677 config CMDLINE_FORCE
 678         bool "Always use the default kernel command string"
 679         depends on CMDLINE_BOOL
 680         help
 681           Always use the default kernel command string, even if the boot
 682           loader passes other arguments to the kernel.
 683           This is useful if you cannot or don't want to change the
 684           command-line options your boot loader passes to the kernel.
 685
 686 config EXTRA_TARGETS
 687         string "Additional default image types"
 688         help
 689           List additional targets to be built by the bootwrapper here (separated
 690           by spaces).  This is useful for targets that depend of device tree
 691           files in the .dts directory.
 692
 693           Targets in this list will be build as part of the default build
 694           target, or when the user does a 'make zImage' or a
 695           'make zImage.initrd'.
 696
 697           If unsure, leave blank
 698
 699 config ARCH_WANTS_FREEZER_CONTROL
 700         def_bool y
 701         depends on ADB_PMU
 702
 703 source kernel/power/Kconfig
 704
 705 config SECCOMP
 706         bool "Enable seccomp to safely compute untrusted bytecode"
 707         depends on PROC_FS
 708         default y
 709         help
 710           This kernel feature is useful for number crunching applications
 711           that may need to compute untrusted bytecode during their
 712           execution. By using pipes or other transports made available to
 713           the process as file descriptors supporting the read/write
 714           syscalls, it's possible to isolate those applications in
 715           their own address space using seccomp. Once seccomp is
 716           enabled via /proc/<pid>/seccomp, it cannot be disabled
 717           and the task is only allowed to execute a few safe syscalls
 718           defined by each seccomp mode.
 719
 720           If unsure, say Y. Only embedded should say N here.
 721
 722 endmenu
 723
 724 config ISA_DMA_API
 725         bool
 726         default PCI
 727
 728 menu "Bus options"
 729
 730 config ISA
 731         bool "Support for ISA-bus hardware"
 732         depends on PPC_CHRP
 733         select PPC_I8259
 734         help
 735           Find out whether you have ISA slots on your motherboard.  ISA is the
 736           name of a bus system, i.e. the way the CPU talks to the other stuff
 737           inside your box.  If you have an Apple machine, say N here; if you
 738           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 739           embedded board, consult your board documentation.
 740
 741 config ZONE_DMA
 742         bool
 743         default y
 744
 745 config NEED_DMA_MAP_STATE
 746         def_bool (PPC64 || NOT_COHERENT_CACHE)
 747
 748 config NEED_SG_DMA_LENGTH
 749         def_bool y
 750
 751 config GENERIC_ISA_DMA
 752         bool
 753         depends on ISA_DMA_API
 754         default y
 755
 756 config PPC_INDIRECT_PCI
 757         bool
 758         depends on PCI
 759         default y if 40x || 44x
 760         default n
 761
 762 config EISA
 763         bool
 764
 765 config SBUS
 766         bool
 767
 768 config FSL_SOC
 769         bool
 770
 771 config FSL_PCI
 772         bool
 773         select PPC_INDIRECT_PCI
 774         select PCI_QUIRKS
 775
 776 config FSL_PMC
 777         bool
 778         default y
 779         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 780         help
 781           Freescale MPC85xx/MPC86xx power management controller support
 782           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 783
 784 config PPC4xx_CPM
 785         bool
 786         default y
 787         depends on SUSPEND && (44x || 40x)
 788         help
 789           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 790           It also enables support for two different idle states (idle-wait
 791           and idle-doze).
 792
 793 config 4xx_SOC
 794         bool
 795
 796 config FSL_LBC
 797         bool "Freescale Local Bus support"
 798         depends on FSL_SOC
 799         help
 800           Enables reporting of errors from the Freescale local bus
 801           controller.  Also contains some common code used by
 802           drivers for specific local bus peripherals.
 803
 804 config FSL_GTM
 805         bool
 806         depends on PPC_83xx || QUICC_ENGINE || CPM2
 807         help
 808           Freescale General-purpose Timers support
 809
 810 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 811 config MCA
 812         bool
 813
 814 # Platforms that what PCI turned unconditionally just do select PCI
 815 # in their config node.  Platforms that want to choose at config
 816 # time should select PPC_PCI_CHOICE
 817 config PPC_PCI_CHOICE
 818         bool
 819
 820 config PCI
 821         bool "PCI support" if PPC_PCI_CHOICE
 822         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 823                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 824         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 825         select GENERIC_PCI_IOMAP
 826         help
 827           Find out whether your system includes a PCI bus. PCI is the name of
 828           a bus system, i.e. the way the CPU talks to the other stuff inside
 829           your box.  If you say Y here, the kernel will include drivers and
 830           infrastructure code to support PCI bus devices.
 831
 832 config PCI_DOMAINS
 833         def_bool PCI
 834
 835 config PCI_SYSCALL
 836         def_bool PCI
 837
 838 config PCI_QSPAN
 839         bool "QSpan PCI"
 840         depends on !4xx && !CPM2 && 8xx
 841         select PPC_I8259
 842         help
 843           Say Y here if you have a system based on a Motorola 8xx-series
 844           embedded processor with a QSPAN PCI interface, otherwise say N.
 845
 846 config PCI_8260
 847         bool
 848         depends on PCI && 8260
 849         select PPC_INDIRECT_PCI
 850         default y
 851
 852 source "drivers/pci/Kconfig"
 853
 854 source "drivers/pcmcia/Kconfig"
 855
 856 config HAS_RAPIDIO
 857         bool
 858         default n
 859
 860 config RAPIDIO
 861         tristate "RapidIO support"
 862         depends on HAS_RAPIDIO || PCI
 863         help
 864           If you say Y here, the kernel will include drivers and
 865           infrastructure code to support RapidIO interconnect devices.
 866
 867 config FSL_RIO
 868         bool "Freescale Embedded SRIO Controller support"
 869         depends on RAPIDIO = y && HAS_RAPIDIO
 870         default "n"
 871         ---help---
 872           Include support for RapidIO controller on Freescale embedded
 873           processors (MPC8548, MPC8641, etc).
 874
 875 source "drivers/rapidio/Kconfig"
 876
 877 endmenu
 878
 879 config NONSTATIC_KERNEL
 880         bool
 881         default n
 882
 883 menu "Advanced setup"
 884         depends on PPC32
 885
 886 config ADVANCED_OPTIONS
 887         bool "Prompt for advanced kernel configuration options"
 888         help
 889           This option will enable prompting for a variety of advanced kernel
 890           configuration options.  These options can cause the kernel to not
 891           work if they are set incorrectly, but can be used to optimize certain
 892           aspects of kernel memory management.
 893
 894           Unless you know what you are doing, say N here.
 895
 896 comment "Default settings for advanced configuration options are used"
 897         depends on !ADVANCED_OPTIONS
 898
 899 config LOWMEM_SIZE_BOOL
 900         bool "Set maximum low memory"
 901         depends on ADVANCED_OPTIONS
 902         help
 903           This option allows you to set the maximum amount of memory which
 904           will be used as "low memory", that is, memory which the kernel can
 905           access directly, without having to set up a kernel virtual mapping.
 906           This can be useful in optimizing the layout of kernel virtual
 907           memory.
 908
 909           Say N here unless you know what you are doing.
 910
 911 config LOWMEM_SIZE
 912         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 913         default "0x30000000"
 914
 915 config LOWMEM_CAM_NUM_BOOL
 916         bool "Set number of CAMs to use to map low memory"
 917         depends on ADVANCED_OPTIONS && FSL_BOOKE
 918         help
 919           This option allows you to set the maximum number of CAM slots that
 920           will be used to map low memory.  There are a limited number of slots
 921           available and even more limited number that will fit in the L1 MMU.
 922           However, using more entries will allow mapping more low memory.  This
 923           can be useful in optimizing the layout of kernel virtual memory.
 924
 925           Say N here unless you know what you are doing.
 926
 927 config LOWMEM_CAM_NUM
 928         depends on FSL_BOOKE
 929         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 930         default 3
 931
 932 config DYNAMIC_MEMSTART
 933         bool "Enable page aligned dynamic load address for kernel"
 934         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 935         select NONSTATIC_KERNEL
 936         help
 937           This option enables the kernel to be loaded at any page aligned
 938           physical address. The kernel creates a mapping from KERNELBASE to
 939           the address where the kernel is loaded. The page size here implies
 940           the TLB page size of the mapping for kernel on the particular platform.
 941           Please refer to the init code for finding the TLB page size.
 942
 943           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 944           kernel image, where the only restriction is the page aligned kernel
 945           load address. When this option is enabled, the compile time physical
 946           address CONFIG_PHYSICAL_START is ignored.
 947
 948           This option is overridden by CONFIG_RELOCATABLE
 949
 950 config RELOCATABLE
 951         bool "Build a relocatable kernel"
 952         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 953         select NONSTATIC_KERNEL
 954         help
 955           This builds a kernel image that is capable of running at the
 956           location the kernel is loaded at, without any alignment restrictions.
 957           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 958
 959           One use is for the kexec on panic case where the recovery kernel
 960           must live at a different physical address than the primary
 961           kernel.
 962
 963           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 964           it has been loaded at and the compile time physical addresses
 965           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 966           setting can still be useful to bootwrappers that need to know the
 967           load address of the kernel (eg. u-boot/mkimage).
 968
 969 config RELOCATABLE_PPC32
 970         def_bool y
 971         depends on PPC32 && RELOCATABLE
 972
 973 config PAGE_OFFSET_BOOL
 974         bool "Set custom page offset 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 map low memory.  This can be useful in optimizing
 979           the virtual memory layout of the system.
 980
 981           Say N here unless you know what you are doing.
 982
 983 config PAGE_OFFSET
 984         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 985         default "0xc0000000"
 986
 987 config KERNEL_START_BOOL
 988         bool "Set custom kernel base address"
 989         depends on ADVANCED_OPTIONS
 990         help
 991           This option allows you to set the kernel virtual address at which
 992           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 993           however there are times (like kdump) that one might not want them
 994           to be the same.
 995
 996           Say N here unless you know what you are doing.
 997
 998 config KERNEL_START
 999         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1000         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1001         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1002         default "0xc0000000"
1003
1004 config PHYSICAL_START_BOOL
1005         bool "Set physical address where the kernel is loaded"
1006         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1007         help
1008           This gives the physical address where the kernel is loaded.
1009
1010           Say N here unless you know what you are doing.
1011
1012 config PHYSICAL_START
1013         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1014         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1015         default "0x00000000"
1016
1017 config PHYSICAL_ALIGN
1018         hex
1019         default "0x04000000" if FSL_BOOKE
1020         help
1021           This value puts the alignment restrictions on physical address
1022           where kernel is loaded and run from. Kernel is compiled for an
1023           address which meets above alignment restriction.
1024
1025 config TASK_SIZE_BOOL
1026         bool "Set custom user task size"
1027         depends on ADVANCED_OPTIONS
1028         help
1029           This option allows you to set the amount of virtual address space
1030           allocated to user tasks.  This can be useful in optimizing the
1031           virtual memory layout of the system.
1032
1033           Say N here unless you know what you are doing.
1034
1035 config TASK_SIZE
1036         hex "Size of user task space" if TASK_SIZE_BOOL
1037         default "0x80000000" if PPC_8xx
1038         default "0xc0000000"
1039
1040 config CONSISTENT_SIZE_BOOL
1041         bool "Set custom consistent memory pool size"
1042         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1043         help
1044           This option allows you to set the size of the
1045           consistent memory pool.  This pool of virtual memory
1046           is used to make consistent memory allocations.
1047
1048 config CONSISTENT_SIZE
1049         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1050         default "0x00200000" if NOT_COHERENT_CACHE
1051
1052 config PIN_TLB
1053         bool "Pinned Kernel TLBs (860 ONLY)"
1054         depends on ADVANCED_OPTIONS && 8xx
1055 endmenu
1056
1057 if PPC64
1058 config RELOCATABLE
1059         bool "Build a relocatable kernel"
1060         depends on !COMPILE_TEST
1061         select NONSTATIC_KERNEL
1062         help
1063           This builds a kernel image that is capable of running anywhere
1064           in the RMA (real memory area) at any 16k-aligned base address.
1065           The kernel is linked as a position-independent executable (PIE)
1066           and contains dynamic relocations which are processed early
1067           in the bootup process.
1068
1069           One use is for the kexec on panic case where the recovery kernel
1070           must live at a different physical address than the primary
1071           kernel.
1072
1073 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1074 config PAGE_OFFSET
1075         hex
1076         default "0xc000000000000000"
1077 config KERNEL_START
1078         hex
1079         default "0xc000000000000000"
1080 config PHYSICAL_START
1081         hex
1082         default "0x00000000"
1083 endif
1084
1085 config  ARCH_RANDOM
1086         def_bool n
1087
1088 source "net/Kconfig"
1089
1090 source "drivers/Kconfig"
1091
1092 source "fs/Kconfig"
1093
1094 source "lib/Kconfig"
1095
1096 source "arch/powerpc/Kconfig.debug"
1097
1098 source "security/Kconfig"
1099
1100 config KEYS_COMPAT
1101         bool
1102         depends on COMPAT && KEYS
1103         default y
1104
1105 source "crypto/Kconfig"
1106
1107 config PPC_LIB_RHEAP
1108         bool
1109
1110 source "arch/powerpc/kvm/Kconfig"
1111
1112 source "kernel/livepatch/Kconfig"