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