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 HAVE_ARCH_SECCOMP_FILTER
 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
 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 IOMMU_HELPER
 379         def_bool PPC64
 380
 381 config SWIOTLB
 382         bool "SWIOTLB support"
 383         default n
 384         select IOMMU_HELPER
 385         ---help---
 386           Support for IO bounce buffering for systems without an IOMMU.
 387           This allows us to DMA to the full physical address space on
 388           platforms where the size of a physical address is larger
 389           than the bus address.  Not all platforms support this.
 390
 391 config HOTPLUG_CPU
 392         bool "Support for enabling/disabling CPUs"
 393         depends on SMP && (PPC_PSERIES || \
 394         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
 395         ---help---
 396           Say Y here to be able to disable and re-enable individual
 397           CPUs at runtime on SMP machines.
 398
 399           Say N if you are unsure.
 400
 401 config ARCH_CPU_PROBE_RELEASE
 402         def_bool y
 403         depends on HOTPLUG_CPU
 404
 405 config ARCH_ENABLE_MEMORY_HOTPLUG
 406         def_bool y
 407
 408 config ARCH_HAS_WALK_MEMORY
 409         def_bool y
 410
 411 config ARCH_ENABLE_MEMORY_HOTREMOVE
 412         def_bool y
 413
 414 config PPC64_SUPPORTS_MEMORY_FAILURE
 415         bool "Add support for memory hwpoison"
 416         depends on PPC_BOOK3S_64
 417         default "y" if PPC_POWERNV
 418         select ARCH_SUPPORTS_MEMORY_FAILURE
 419
 420 config KEXEC
 421         bool "kexec system call"
 422         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
 423         help
 424           kexec is a system call that implements the ability to shutdown your
 425           current kernel, and to start another kernel.  It is like a reboot
 426           but it is independent of the system firmware.   And like a reboot
 427           you can start any kernel with it, not just Linux.
 428
 429           The name comes from the similarity to the exec system call.
 430
 431           It is an ongoing process to be certain the hardware in a machine
 432           is properly shutdown, so do not be surprised if this code does not
 433           initially work for you.  As of this writing the exact hardware
 434           interface is strongly in flux, so no good recommendation can be
 435           made.
 436
 437 config CRASH_DUMP
 438         bool "Build a kdump crash kernel"
 439         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 440         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 441         help
 442           Build a kernel suitable for use as a kdump capture kernel.
 443           The same kernel binary can be used as production kernel and dump
 444           capture kernel.
 445
 446 config FA_DUMP
 447         bool "Firmware-assisted dump"
 448         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 449         help
 450           A robust mechanism to get reliable kernel crash dump with
 451           assistance from firmware. This approach does not use kexec,
 452           instead firmware assists in booting the kdump kernel
 453           while preserving memory contents. Firmware-assisted dump
 454           is meant to be a kdump replacement offering robustness and
 455           speed not possible without system firmware assistance.
 456
 457           If unsure, say "N"
 458
 459 config IRQ_ALL_CPUS
 460         bool "Distribute interrupts on all CPUs by default"
 461         depends on SMP
 462         help
 463           This option gives the kernel permission to distribute IRQs across
 464           multiple CPUs.  Saying N here will route all IRQs to the first
 465           CPU.  Generally saying Y is safe, although some problems have been
 466           reported with SMP Power Macintoshes with this option enabled.
 467
 468 config NUMA
 469         bool "NUMA support"
 470         depends on PPC64
 471         default y if SMP && PPC_PSERIES
 472
 473 config NODES_SHIFT
 474         int
 475         default "8" if PPC64
 476         default "4"
 477         depends on NEED_MULTIPLE_NODES
 478
 479 config USE_PERCPU_NUMA_NODE_ID
 480         def_bool y
 481         depends on NUMA
 482
 483 config HAVE_MEMORYLESS_NODES
 484         def_bool y
 485         depends on NUMA
 486
 487 config ARCH_SELECT_MEMORY_MODEL
 488         def_bool y
 489         depends on PPC64
 490
 491 config ARCH_FLATMEM_ENABLE
 492         def_bool y
 493         depends on (PPC64 && !NUMA) || PPC32
 494
 495 config ARCH_SPARSEMEM_ENABLE
 496         def_bool y
 497         depends on PPC64
 498         select SPARSEMEM_VMEMMAP_ENABLE
 499
 500 config ARCH_SPARSEMEM_DEFAULT
 501         def_bool y
 502         depends on (SMP && PPC_PSERIES) || PPC_PS3
 503
 504 config SYS_SUPPORTS_HUGETLBFS
 505         bool
 506
 507 source "mm/Kconfig"
 508
 509 config ARCH_MEMORY_PROBE
 510         def_bool y
 511         depends on MEMORY_HOTPLUG
 512
 513 # Some NUMA nodes have memory ranges that span
 514 # other nodes.  Even though a pfn is valid and
 515 # between a node's start and end pfns, it may not
 516 # reside on that node.  See memmap_init_zone()
 517 # for details.
 518 config NODES_SPAN_OTHER_NODES
 519         def_bool y
 520         depends on NEED_MULTIPLE_NODES
 521
 522 config STDBINUTILS
 523         bool "Using standard binutils settings"
 524         depends on 44x
 525         default y
 526         help
 527           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 528           Note, that kernel will be able to run only those applications,
 529           which had been compiled using binutils later than 2.17.50.0.3 with
 530           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 531           the older binutils, you can patch them with a trivial patch, which
 532           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 533
 534 choice
 535         prompt "Page size"
 536         default PPC_4K_PAGES
 537         help
 538           Select the kernel logical page size. Increasing the page size
 539           will reduce software overhead at each page boundary, allow
 540           hardware prefetch mechanisms to be more effective, and allow
 541           larger dma transfers increasing IO efficiency and reducing
 542           overhead. However the utilization of memory will increase.
 543           For example, each cached file will using a multiple of the
 544           page size to hold its contents and the difference between the
 545           end of file and the end of page is wasted.
 546
 547           Some dedicated systems, such as software raid serving with
 548           accelerated calculations, have shown significant increases.
 549
 550           If you configure a 64 bit kernel for 64k pages but the
 551           processor does not support them, then the kernel will simulate
 552           them with 4k pages, loading them on demand, but with the
 553           reduced software overhead and larger internal fragmentation.
 554           For the 32 bit kernel, a large page option will not be offered
 555           unless it is supported by the configured processor.
 556
 557           If unsure, choose 4K_PAGES.
 558
 559 config PPC_4K_PAGES
 560         bool "4k page size"
 561
 562 config PPC_16K_PAGES
 563         bool "16k page size"
 564         depends on 44x || PPC_8xx
 565
 566 config PPC_64K_PAGES
 567         bool "64k page size"
 568         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 569
 570 config PPC_256K_PAGES
 571         bool "256k page size"
 572         depends on 44x && !STDBINUTILS
 573         help
 574           Make the page size 256k.
 575
 576           As the ELF standard only requires alignment to support page
 577           sizes up to 64k, you will need to compile all of your user
 578           space applications with a non-standard binutils settings
 579           (see the STDBINUTILS description for details).
 580
 581           Say N unless you know what you are doing.
 582
 583 endchoice
 584
 585 config FORCE_MAX_ZONEORDER
 586         int "Maximum zone order"
 587         range 9 64 if PPC64 && PPC_64K_PAGES
 588         default "9" if PPC64 && PPC_64K_PAGES
 589         range 13 64 if PPC64 && !PPC_64K_PAGES
 590         default "13" if PPC64 && !PPC_64K_PAGES
 591         range 9 64 if PPC32 && PPC_16K_PAGES
 592         default "9" if PPC32 && PPC_16K_PAGES
 593         range 7 64 if PPC32 && PPC_64K_PAGES
 594         default "7" if PPC32 && PPC_64K_PAGES
 595         range 5 64 if PPC32 && PPC_256K_PAGES
 596         default "5" if PPC32 && PPC_256K_PAGES
 597         range 11 64
 598         default "11"
 599         help
 600           The kernel memory allocator divides physically contiguous memory
 601           blocks into "zones", where each zone is a power of two number of
 602           pages.  This option selects the largest power of two that the kernel
 603           keeps in the memory allocator.  If you need to allocate very large
 604           blocks of physically contiguous memory, then you may need to
 605           increase this value.
 606
 607           This config option is actually maximum order plus one. For example,
 608           a value of 11 means that the largest free memory block is 2^10 pages.
 609
 610           The page size is not necessarily 4KB.  For example, on 64-bit
 611           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 612           this in mind when choosing a value for this option.
 613
 614 config PPC_SUBPAGE_PROT
 615         bool "Support setting protections for 4k subpages"
 616         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 617         help
 618           This option adds support for a system call to allow user programs
 619           to set access permissions (read/write, readonly, or no access)
 620           on the 4k subpages of each 64k page.
 621
 622 config PPC_COPRO_BASE
 623         bool
 624         default n
 625
 626 config SCHED_SMT
 627         bool "SMT (Hyperthreading) scheduler support"
 628         depends on PPC64 && SMP
 629         help
 630           SMT scheduler support improves the CPU scheduler's decision making
 631           when dealing with POWER5 cpus at a cost of slightly increased
 632           overhead in some places. If unsure say N here.
 633
 634 config PPC_DENORMALISATION
 635         bool "PowerPC denormalisation exception handling"
 636         depends on PPC_BOOK3S_64
 637         default "y" if PPC_POWERNV
 638         ---help---
 639           Add support for handling denormalisation of single precision
 640           values.  Useful for bare metal only.  If unsure say Y here.
 641
 642 config CMDLINE_BOOL
 643         bool "Default bootloader kernel arguments"
 644
 645 config CMDLINE
 646         string "Initial kernel command string"
 647         depends on CMDLINE_BOOL
 648         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 649         help
 650           On some platforms, there is currently no way for the boot loader to
 651           pass arguments to the kernel. For these platforms, you can supply
 652           some command-line options at build time by entering them here.  In
 653           most cases you will need to specify the root device here.
 654
 655 config CMDLINE_FORCE
 656         bool "Always use the default kernel command string"
 657         depends on CMDLINE_BOOL
 658         help
 659           Always use the default kernel command string, even if the boot
 660           loader passes other arguments to the kernel.
 661           This is useful if you cannot or don't want to change the
 662           command-line options your boot loader passes to the kernel.
 663
 664 config EXTRA_TARGETS
 665         string "Additional default image types"
 666         help
 667           List additional targets to be built by the bootwrapper here (separated
 668           by spaces).  This is useful for targets that depend of device tree
 669           files in the .dts directory.
 670
 671           Targets in this list will be build as part of the default build
 672           target, or when the user does a 'make zImage' or a
 673           'make zImage.initrd'.
 674
 675           If unsure, leave blank
 676
 677 config ARCH_WANTS_FREEZER_CONTROL
 678         def_bool y
 679         depends on ADB_PMU
 680
 681 source kernel/power/Kconfig
 682
 683 config SECCOMP
 684         bool "Enable seccomp to safely compute untrusted bytecode"
 685         depends on PROC_FS
 686         default y
 687         help
 688           This kernel feature is useful for number crunching applications
 689           that may need to compute untrusted bytecode during their
 690           execution. By using pipes or other transports made available to
 691           the process as file descriptors supporting the read/write
 692           syscalls, it's possible to isolate those applications in
 693           their own address space using seccomp. Once seccomp is
 694           enabled via /proc/<pid>/seccomp, it cannot be disabled
 695           and the task is only allowed to execute a few safe syscalls
 696           defined by each seccomp mode.
 697
 698           If unsure, say Y. Only embedded should say N here.
 699
 700 endmenu
 701
 702 config ISA_DMA_API
 703         bool
 704         default PCI
 705
 706 menu "Bus options"
 707
 708 config ISA
 709         bool "Support for ISA-bus hardware"
 710         depends on PPC_CHRP
 711         select PPC_I8259
 712         help
 713           Find out whether you have ISA slots on your motherboard.  ISA is the
 714           name of a bus system, i.e. the way the CPU talks to the other stuff
 715           inside your box.  If you have an Apple machine, say N here; if you
 716           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 717           embedded board, consult your board documentation.
 718
 719 config ZONE_DMA
 720         bool
 721         default y
 722
 723 config NEED_DMA_MAP_STATE
 724         def_bool (PPC64 || NOT_COHERENT_CACHE)
 725
 726 config NEED_SG_DMA_LENGTH
 727         def_bool y
 728
 729 config GENERIC_ISA_DMA
 730         bool
 731         depends on ISA_DMA_API
 732         default y
 733
 734 config PPC_INDIRECT_PCI
 735         bool
 736         depends on PCI
 737         default y if 40x || 44x
 738         default n
 739
 740 config EISA
 741         bool
 742
 743 config SBUS
 744         bool
 745
 746 config FSL_SOC
 747         bool
 748
 749 config FSL_PCI
 750         bool
 751         select PPC_INDIRECT_PCI
 752         select PCI_QUIRKS
 753
 754 config FSL_PMC
 755         bool
 756         default y
 757         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 758         help
 759           Freescale MPC85xx/MPC86xx power management controller support
 760           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 761
 762 config PPC4xx_CPM
 763         bool
 764         default y
 765         depends on SUSPEND && (44x || 40x)
 766         help
 767           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 768           It also enables support for two different idle states (idle-wait
 769           and idle-doze).
 770
 771 config 4xx_SOC
 772         bool
 773
 774 config FSL_LBC
 775         bool "Freescale Local Bus support"
 776         depends on FSL_SOC
 777         help
 778           Enables reporting of errors from the Freescale local bus
 779           controller.  Also contains some common code used by
 780           drivers for specific local bus peripherals.
 781
 782 config FSL_GTM
 783         bool
 784         depends on PPC_83xx || QUICC_ENGINE || CPM2
 785         help
 786           Freescale General-purpose Timers support
 787
 788 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 789 config MCA
 790         bool
 791
 792 # Platforms that what PCI turned unconditionally just do select PCI
 793 # in their config node.  Platforms that want to choose at config
 794 # time should select PPC_PCI_CHOICE
 795 config PPC_PCI_CHOICE
 796         bool
 797
 798 config PCI
 799         bool "PCI support" if PPC_PCI_CHOICE
 800         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 801                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 802         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 803         select GENERIC_PCI_IOMAP
 804         help
 805           Find out whether your system includes a PCI bus. PCI is the name of
 806           a bus system, i.e. the way the CPU talks to the other stuff inside
 807           your box.  If you say Y here, the kernel will include drivers and
 808           infrastructure code to support PCI bus devices.
 809
 810 config PCI_DOMAINS
 811         def_bool PCI
 812
 813 config PCI_SYSCALL
 814         def_bool PCI
 815
 816 config PCI_QSPAN
 817         bool "QSpan PCI"
 818         depends on !4xx && !CPM2 && 8xx
 819         select PPC_I8259
 820         help
 821           Say Y here if you have a system based on a Motorola 8xx-series
 822           embedded processor with a QSPAN PCI interface, otherwise say N.
 823
 824 config PCI_8260
 825         bool
 826         depends on PCI && 8260
 827         select PPC_INDIRECT_PCI
 828         default y
 829
 830 source "drivers/pci/pcie/Kconfig"
 831
 832 source "drivers/pci/Kconfig"
 833
 834 source "drivers/pcmcia/Kconfig"
 835
 836 source "drivers/pci/hotplug/Kconfig"
 837
 838 config HAS_RAPIDIO
 839         bool
 840         default n
 841
 842 config RAPIDIO
 843         tristate "RapidIO support"
 844         depends on HAS_RAPIDIO || PCI
 845         help
 846           If you say Y here, the kernel will include drivers and
 847           infrastructure code to support RapidIO interconnect devices.
 848
 849 config FSL_RIO
 850         bool "Freescale Embedded SRIO Controller support"
 851         depends on RAPIDIO = y && HAS_RAPIDIO
 852         default "n"
 853         ---help---
 854           Include support for RapidIO controller on Freescale embedded
 855           processors (MPC8548, MPC8641, etc).
 856
 857 source "drivers/rapidio/Kconfig"
 858
 859 endmenu
 860
 861 config NONSTATIC_KERNEL
 862         bool
 863         default n
 864
 865 menu "Advanced setup"
 866         depends on PPC32
 867
 868 config ADVANCED_OPTIONS
 869         bool "Prompt for advanced kernel configuration options"
 870         help
 871           This option will enable prompting for a variety of advanced kernel
 872           configuration options.  These options can cause the kernel to not
 873           work if they are set incorrectly, but can be used to optimize certain
 874           aspects of kernel memory management.
 875
 876           Unless you know what you are doing, say N here.
 877
 878 comment "Default settings for advanced configuration options are used"
 879         depends on !ADVANCED_OPTIONS
 880
 881 config LOWMEM_SIZE_BOOL
 882         bool "Set maximum low memory"
 883         depends on ADVANCED_OPTIONS
 884         help
 885           This option allows you to set the maximum amount of memory which
 886           will be used as "low memory", that is, memory which the kernel can
 887           access directly, without having to set up a kernel virtual mapping.
 888           This can be useful in optimizing the layout of kernel virtual
 889           memory.
 890
 891           Say N here unless you know what you are doing.
 892
 893 config LOWMEM_SIZE
 894         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 895         default "0x30000000"
 896
 897 config LOWMEM_CAM_NUM_BOOL
 898         bool "Set number of CAMs to use to map low memory"
 899         depends on ADVANCED_OPTIONS && FSL_BOOKE
 900         help
 901           This option allows you to set the maximum number of CAM slots that
 902           will be used to map low memory.  There are a limited number of slots
 903           available and even more limited number that will fit in the L1 MMU.
 904           However, using more entries will allow mapping more low memory.  This
 905           can be useful in optimizing the layout of kernel virtual memory.
 906
 907           Say N here unless you know what you are doing.
 908
 909 config LOWMEM_CAM_NUM
 910         depends on FSL_BOOKE
 911         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 912         default 3
 913
 914 config DYNAMIC_MEMSTART
 915         bool "Enable page aligned dynamic load address for kernel"
 916         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 917         select NONSTATIC_KERNEL
 918         help
 919           This option enables the kernel to be loaded at any page aligned
 920           physical address. The kernel creates a mapping from KERNELBASE to
 921           the address where the kernel is loaded. The page size here implies
 922           the TLB page size of the mapping for kernel on the particular platform.
 923           Please refer to the init code for finding the TLB page size.
 924
 925           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 926           kernel image, where the only restriction is the page aligned kernel
 927           load address. When this option is enabled, the compile time physical
 928           address CONFIG_PHYSICAL_START is ignored.
 929
 930           This option is overridden by CONFIG_RELOCATABLE
 931
 932 config RELOCATABLE
 933         bool "Build a relocatable kernel"
 934         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 935         select NONSTATIC_KERNEL
 936         help
 937           This builds a kernel image that is capable of running at the
 938           location the kernel is loaded at, without any alignment restrictions.
 939           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 940
 941           One use is for the kexec on panic case where the recovery kernel
 942           must live at a different physical address than the primary
 943           kernel.
 944
 945           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 946           it has been loaded at and the compile time physical addresses
 947           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 948           setting can still be useful to bootwrappers that need to know the
 949           load address of the kernel (eg. u-boot/mkimage).
 950
 951 config RELOCATABLE_PPC32
 952         def_bool y
 953         depends on PPC32 && RELOCATABLE
 954
 955 config PAGE_OFFSET_BOOL
 956         bool "Set custom page offset address"
 957         depends on ADVANCED_OPTIONS
 958         help
 959           This option allows you to set the kernel virtual address at which
 960           the kernel will map low memory.  This can be useful in optimizing
 961           the virtual memory layout of the system.
 962
 963           Say N here unless you know what you are doing.
 964
 965 config PAGE_OFFSET
 966         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 967         default "0xc0000000"
 968
 969 config KERNEL_START_BOOL
 970         bool "Set custom kernel base address"
 971         depends on ADVANCED_OPTIONS
 972         help
 973           This option allows you to set the kernel virtual address at which
 974           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 975           however there are times (like kdump) that one might not want them
 976           to be the same.
 977
 978           Say N here unless you know what you are doing.
 979
 980 config KERNEL_START
 981         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 982         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 983         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
 984         default "0xc0000000"
 985
 986 config PHYSICAL_START_BOOL
 987         bool "Set physical address where the kernel is loaded"
 988         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 989         help
 990           This gives the physical address where the kernel is loaded.
 991
 992           Say N here unless you know what you are doing.
 993
 994 config PHYSICAL_START
 995         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 996         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
 997         default "0x00000000"
 998
 999 config PHYSICAL_ALIGN
1000         hex
1001         default "0x04000000" if FSL_BOOKE
1002         help
1003           This value puts the alignment restrictions on physical address
1004           where kernel is loaded and run from. Kernel is compiled for an
1005           address which meets above alignment restriction.
1006
1007 config TASK_SIZE_BOOL
1008         bool "Set custom user task size"
1009         depends on ADVANCED_OPTIONS
1010         help
1011           This option allows you to set the amount of virtual address space
1012           allocated to user tasks.  This can be useful in optimizing the
1013           virtual memory layout of the system.
1014
1015           Say N here unless you know what you are doing.
1016
1017 config TASK_SIZE
1018         hex "Size of user task space" if TASK_SIZE_BOOL
1019         default "0x80000000" if PPC_8xx
1020         default "0xc0000000"
1021
1022 config CONSISTENT_SIZE_BOOL
1023         bool "Set custom consistent memory pool size"
1024         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1025         help
1026           This option allows you to set the size of the
1027           consistent memory pool.  This pool of virtual memory
1028           is used to make consistent memory allocations.
1029
1030 config CONSISTENT_SIZE
1031         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1032         default "0x00200000" if NOT_COHERENT_CACHE
1033
1034 config PIN_TLB
1035         bool "Pinned Kernel TLBs (860 ONLY)"
1036         depends on ADVANCED_OPTIONS && 8xx
1037 endmenu
1038
1039 if PPC64
1040 config RELOCATABLE
1041         bool "Build a relocatable kernel"
1042         depends on !COMPILE_TEST
1043         select NONSTATIC_KERNEL
1044         help
1045           This builds a kernel image that is capable of running anywhere
1046           in the RMA (real memory area) at any 16k-aligned base address.
1047           The kernel is linked as a position-independent executable (PIE)
1048           and contains dynamic relocations which are processed early
1049           in the bootup process.
1050
1051           One use is for the kexec on panic case where the recovery kernel
1052           must live at a different physical address than the primary
1053           kernel.
1054
1055 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1056 config PAGE_OFFSET
1057         hex
1058         default "0xc000000000000000"
1059 config KERNEL_START
1060         hex
1061         default "0xc000000000000000"
1062 config PHYSICAL_START
1063         hex
1064         default "0x00000000"
1065 endif
1066
1067 config  ARCH_RANDOM
1068         def_bool n
1069
1070 source "net/Kconfig"
1071
1072 source "drivers/Kconfig"
1073
1074 source "fs/Kconfig"
1075
1076 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1077
1078 source "lib/Kconfig"
1079
1080 source "arch/powerpc/Kconfig.debug"
1081
1082 source "security/Kconfig"
1083
1084 config KEYS_COMPAT
1085         bool
1086         depends on COMPAT && KEYS
1087         default y
1088
1089 source "crypto/Kconfig"
1090
1091 config PPC_LIB_RHEAP
1092         bool
1093
1094 source "arch/powerpc/kvm/Kconfig"