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 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_BINFMT_ELF_RANDOMIZE_PIE
  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_ATTRS
 112         select HAVE_DMA_API_DEBUG
 113         select HAVE_OPROFILE
 114         select HAVE_DEBUG_KMEMLEAK
 115         select ARCH_HAS_SG_CHAIN
 116         select GENERIC_ATOMIC64 if PPC32
 117         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 118         select HAVE_PERF_EVENTS
 119         select HAVE_REGS_AND_STACK_ACCESS_API
 120         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 121         select ARCH_WANT_IPC_PARSE_VERSION
 122         select SPARSE_IRQ
 123         select IRQ_DOMAIN
 124         select GENERIC_IRQ_SHOW
 125         select GENERIC_IRQ_SHOW_LEVEL
 126         select IRQ_FORCED_THREADING
 127         select HAVE_RCU_TABLE_FREE if SMP
 128         select HAVE_SYSCALL_TRACEPOINTS
 129         select HAVE_BPF_JIT if PPC64
 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
 156 config GENERIC_CSUM
 157         def_bool CPU_LITTLE_ENDIAN
 158
 159 config EARLY_PRINTK
 160         bool
 161         default y
 162
 163 config PANIC_TIMEOUT
 164         int
 165         default 180
 166
 167 config COMPAT
 168         bool
 169         default y if PPC64
 170         select COMPAT_BINFMT_ELF
 171         select ARCH_WANT_OLD_COMPAT_IPC
 172         select COMPAT_OLD_SIGACTION
 173
 174 config SYSVIPC_COMPAT
 175         bool
 176         depends on COMPAT && SYSVIPC
 177         default y
 178
 179 # All PPC32s use generic nvram driver through ppc_md
 180 config GENERIC_NVRAM
 181         bool
 182         default y if PPC32
 183
 184 config SCHED_OMIT_FRAME_POINTER
 185         bool
 186         default y
 187
 188 config ARCH_MAY_HAVE_PC_FDC
 189         bool
 190         default PCI
 191
 192 config PPC_OF
 193         def_bool y
 194
 195 config PPC_UDBG_16550
 196         bool
 197         default n
 198
 199 config GENERIC_TBSYNC
 200         bool
 201         default y if PPC32 && SMP
 202         default n
 203
 204 config AUDIT_ARCH
 205         bool
 206         default y
 207
 208 config GENERIC_BUG
 209         bool
 210         default y
 211         depends on BUG
 212
 213 config SYS_SUPPORTS_APM_EMULATION
 214         default y if PMAC_APM_EMU
 215         bool
 216
 217 config EPAPR_BOOT
 218         bool
 219         help
 220           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 221         default n
 222
 223 config DEFAULT_UIMAGE
 224         bool
 225         help
 226           Used to allow a board to specify it wants a uImage built by default
 227         default n
 228
 229 config ARCH_HIBERNATION_POSSIBLE
 230         bool
 231         default y
 232
 233 config ARCH_SUSPEND_POSSIBLE
 234         def_bool y
 235         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 236                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 237                    || 44x || 40x
 238
 239 config PPC_DCR_NATIVE
 240         bool
 241         default n
 242
 243 config PPC_DCR_MMIO
 244         bool
 245         default n
 246
 247 config PPC_DCR
 248         bool
 249         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 250         default y
 251
 252 config PPC_OF_PLATFORM_PCI
 253         bool
 254         depends on PCI
 255         depends on PPC64 # not supported on 32 bits yet
 256         default n
 257
 258 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 259         def_bool y
 260
 261 config ARCH_SUPPORTS_UPROBES
 262         def_bool y
 263
 264 config PPC_ADV_DEBUG_REGS
 265         bool
 266         depends on 40x || BOOKE
 267         default y
 268
 269 config PPC_ADV_DEBUG_IACS
 270         int
 271         depends on PPC_ADV_DEBUG_REGS
 272         default 4 if 44x
 273         default 2
 274
 275 config PPC_ADV_DEBUG_DACS
 276         int
 277         depends on PPC_ADV_DEBUG_REGS
 278         default 2
 279
 280 config PPC_ADV_DEBUG_DVCS
 281         int
 282         depends on PPC_ADV_DEBUG_REGS
 283         default 2 if 44x
 284         default 0
 285
 286 config PPC_ADV_DEBUG_DAC_RANGE
 287         bool
 288         depends on PPC_ADV_DEBUG_REGS && 44x
 289         default y
 290
 291 config PPC_EMULATE_SSTEP
 292         bool
 293         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 294
 295 config ZONE_DMA32
 296         bool
 297         default y if PPC64
 298
 299 source "init/Kconfig"
 300
 301 source "kernel/Kconfig.freezer"
 302
 303 source "arch/powerpc/sysdev/Kconfig"
 304 source "arch/powerpc/platforms/Kconfig"
 305
 306 menu "Kernel options"
 307
 308 config HIGHMEM
 309         bool "High memory support"
 310         depends on PPC32
 311
 312 source kernel/Kconfig.hz
 313 source kernel/Kconfig.preempt
 314 source "fs/Kconfig.binfmt"
 315
 316 config HUGETLB_PAGE_SIZE_VARIABLE
 317         bool
 318         depends on HUGETLB_PAGE
 319         default y
 320
 321 config MATH_EMULATION
 322         bool "Math emulation"
 323         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 324         ---help---
 325           Some PowerPC chips designed for embedded applications do not have
 326           a floating-point unit and therefore do not implement the
 327           floating-point instructions in the PowerPC instruction set.  If you
 328           say Y here, the kernel will include code to emulate a floating-point
 329           unit, which will allow programs that use floating-point
 330           instructions to run.
 331
 332           This is also useful to emulate missing (optional) instructions
 333           such as fsqrt on cores that do have an FPU but do not implement
 334           them (such as Freescale BookE).
 335
 336 choice
 337         prompt "Math emulation options"
 338         default MATH_EMULATION_FULL
 339         depends on MATH_EMULATION
 340
 341 config  MATH_EMULATION_FULL
 342         bool "Emulate all the floating point instructions"
 343         ---help---
 344           Select this option will enable the kernel to support to emulate
 345           all the floating point instructions. If your SoC doesn't have
 346           a FPU, you should select this.
 347
 348 config MATH_EMULATION_HW_UNIMPLEMENTED
 349         bool "Just emulate the FPU unimplemented instructions"
 350         ---help---
 351           Select this if you know there does have a hardware FPU on your
 352           SoC, but some floating point instructions are not implemented by that.
 353
 354 endchoice
 355
 356 config PPC_TRANSACTIONAL_MEM
 357        bool "Transactional Memory support for POWERPC"
 358        depends on PPC_BOOK3S_64
 359        depends on SMP
 360        select ALTIVEC
 361        select VSX
 362        default n
 363        ---help---
 364          Support user-mode Transactional Memory on POWERPC.
 365
 366 config IOMMU_HELPER
 367         def_bool PPC64
 368
 369 config SWIOTLB
 370         bool "SWIOTLB support"
 371         default n
 372         select IOMMU_HELPER
 373         ---help---
 374           Support for IO bounce buffering for systems without an IOMMU.
 375           This allows us to DMA to the full physical address space on
 376           platforms where the size of a physical address is larger
 377           than the bus address.  Not all platforms support this.
 378
 379 config HOTPLUG_CPU
 380         bool "Support for enabling/disabling CPUs"
 381         depends on SMP && (PPC_PSERIES || \
 382         PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
 383         ---help---
 384           Say Y here to be able to disable and re-enable individual
 385           CPUs at runtime on SMP machines.
 386
 387           Say N if you are unsure.
 388
 389 config ARCH_CPU_PROBE_RELEASE
 390         def_bool y
 391         depends on HOTPLUG_CPU
 392
 393 config ARCH_ENABLE_MEMORY_HOTPLUG
 394         def_bool y
 395
 396 config ARCH_HAS_WALK_MEMORY
 397         def_bool y
 398
 399 config ARCH_ENABLE_MEMORY_HOTREMOVE
 400         def_bool y
 401
 402 config PPC64_SUPPORTS_MEMORY_FAILURE
 403         bool "Add support for memory hwpoison"
 404         depends on PPC_BOOK3S_64
 405         default "y" if PPC_POWERNV
 406         select ARCH_SUPPORTS_MEMORY_FAILURE
 407
 408 config KEXEC
 409         bool "kexec system call"
 410         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
 411         help
 412           kexec is a system call that implements the ability to shutdown your
 413           current kernel, and to start another kernel.  It is like a reboot
 414           but it is independent of the system firmware.   And like a reboot
 415           you can start any kernel with it, not just Linux.
 416
 417           The name comes from the similarity to the exec system call.
 418
 419           It is an ongoing process to be certain the hardware in a machine
 420           is properly shutdown, so do not be surprised if this code does not
 421           initially work for you.  As of this writing the exact hardware
 422           interface is strongly in flux, so no good recommendation can be
 423           made.
 424
 425 config CRASH_DUMP
 426         bool "Build a kdump crash kernel"
 427         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 428         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 429         help
 430           Build a kernel suitable for use as a kdump capture kernel.
 431           The same kernel binary can be used as production kernel and dump
 432           capture kernel.
 433
 434 config FA_DUMP
 435         bool "Firmware-assisted dump"
 436         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 437         help
 438           A robust mechanism to get reliable kernel crash dump with
 439           assistance from firmware. This approach does not use kexec,
 440           instead firmware assists in booting the kdump kernel
 441           while preserving memory contents. Firmware-assisted dump
 442           is meant to be a kdump replacement offering robustness and
 443           speed not possible without system firmware assistance.
 444
 445           If unsure, say "N"
 446
 447 config IRQ_ALL_CPUS
 448         bool "Distribute interrupts on all CPUs by default"
 449         depends on SMP
 450         help
 451           This option gives the kernel permission to distribute IRQs across
 452           multiple CPUs.  Saying N here will route all IRQs to the first
 453           CPU.  Generally saying Y is safe, although some problems have been
 454           reported with SMP Power Macintoshes with this option enabled.
 455
 456 config NUMA
 457         bool "NUMA support"
 458         depends on PPC64
 459         default y if SMP && PPC_PSERIES
 460
 461 config NODES_SHIFT
 462         int
 463         default "8" if PPC64
 464         default "4"
 465         depends on NEED_MULTIPLE_NODES
 466
 467 config USE_PERCPU_NUMA_NODE_ID
 468         def_bool y
 469         depends on NUMA
 470
 471 config HAVE_MEMORYLESS_NODES
 472         def_bool y
 473         depends on NUMA
 474
 475 config ARCH_SELECT_MEMORY_MODEL
 476         def_bool y
 477         depends on PPC64
 478
 479 config ARCH_FLATMEM_ENABLE
 480         def_bool y
 481         depends on (PPC64 && !NUMA) || PPC32
 482
 483 config ARCH_SPARSEMEM_ENABLE
 484         def_bool y
 485         depends on PPC64
 486         select SPARSEMEM_VMEMMAP_ENABLE
 487
 488 config ARCH_SPARSEMEM_DEFAULT
 489         def_bool y
 490         depends on (SMP && PPC_PSERIES) || PPC_PS3
 491
 492 config SYS_SUPPORTS_HUGETLBFS
 493         bool
 494
 495 source "mm/Kconfig"
 496
 497 config ARCH_MEMORY_PROBE
 498         def_bool y
 499         depends on MEMORY_HOTPLUG
 500
 501 # Some NUMA nodes have memory ranges that span
 502 # other nodes.  Even though a pfn is valid and
 503 # between a node's start and end pfns, it may not
 504 # reside on that node.  See memmap_init_zone()
 505 # for details.
 506 config NODES_SPAN_OTHER_NODES
 507         def_bool y
 508         depends on NEED_MULTIPLE_NODES
 509
 510 config PPC_HAS_HASH_64K
 511         bool
 512         depends on PPC64
 513         default n
 514
 515 config STDBINUTILS
 516         bool "Using standard binutils settings"
 517         depends on 44x
 518         default y
 519         help
 520           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 521           Note, that kernel will be able to run only those applications,
 522           which had been compiled using binutils later than 2.17.50.0.3 with
 523           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 524           the older binutils, you can patch them with a trivial patch, which
 525           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 526
 527 choice
 528         prompt "Page size"
 529         default PPC_4K_PAGES
 530         help
 531           Select the kernel logical page size. Increasing the page size
 532           will reduce software overhead at each page boundary, allow
 533           hardware prefetch mechanisms to be more effective, and allow
 534           larger dma transfers increasing IO efficiency and reducing
 535           overhead. However the utilization of memory will increase.
 536           For example, each cached file will using a multiple of the
 537           page size to hold its contents and the difference between the
 538           end of file and the end of page is wasted.
 539
 540           Some dedicated systems, such as software raid serving with
 541           accelerated calculations, have shown significant increases.
 542
 543           If you configure a 64 bit kernel for 64k pages but the
 544           processor does not support them, then the kernel will simulate
 545           them with 4k pages, loading them on demand, but with the
 546           reduced software overhead and larger internal fragmentation.
 547           For the 32 bit kernel, a large page option will not be offered
 548           unless it is supported by the configured processor.
 549
 550           If unsure, choose 4K_PAGES.
 551
 552 config PPC_4K_PAGES
 553         bool "4k page size"
 554
 555 config PPC_16K_PAGES
 556         bool "16k page size" if 44x || PPC_8xx
 557
 558 config PPC_64K_PAGES
 559         bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
 560         depends on !PPC_FSL_BOOK3E
 561         select PPC_HAS_HASH_64K if PPC_STD_MMU_64
 562
 563 config PPC_256K_PAGES
 564         bool "256k page size" if 44x
 565         depends on !STDBINUTILS
 566         help
 567           Make the page size 256k.
 568
 569           As the ELF standard only requires alignment to support page
 570           sizes up to 64k, you will need to compile all of your user
 571           space applications with a non-standard binutils settings
 572           (see the STDBINUTILS description for details).
 573
 574           Say N unless you know what you are doing.
 575
 576 endchoice
 577
 578 config FORCE_MAX_ZONEORDER
 579         int "Maximum zone order"
 580         range 9 64 if PPC64 && PPC_64K_PAGES
 581         default "9" if PPC64 && PPC_64K_PAGES
 582         range 13 64 if PPC64 && !PPC_64K_PAGES
 583         default "13" if PPC64 && !PPC_64K_PAGES
 584         range 9 64 if PPC32 && PPC_16K_PAGES
 585         default "9" if PPC32 && PPC_16K_PAGES
 586         range 7 64 if PPC32 && PPC_64K_PAGES
 587         default "7" if PPC32 && PPC_64K_PAGES
 588         range 5 64 if PPC32 && PPC_256K_PAGES
 589         default "5" if PPC32 && PPC_256K_PAGES
 590         range 11 64
 591         default "11"
 592         help
 593           The kernel memory allocator divides physically contiguous memory
 594           blocks into "zones", where each zone is a power of two number of
 595           pages.  This option selects the largest power of two that the kernel
 596           keeps in the memory allocator.  If you need to allocate very large
 597           blocks of physically contiguous memory, then you may need to
 598           increase this value.
 599
 600           This config option is actually maximum order plus one. For example,
 601           a value of 11 means that the largest free memory block is 2^10 pages.
 602
 603           The page size is not necessarily 4KB.  For example, on 64-bit
 604           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 605           this in mind when choosing a value for this option.
 606
 607 config PPC_SUBPAGE_PROT
 608         bool "Support setting protections for 4k subpages"
 609         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 610         help
 611           This option adds support for a system call to allow user programs
 612           to set access permissions (read/write, readonly, or no access)
 613           on the 4k subpages of each 64k page.
 614
 615 config PPC_COPRO_BASE
 616         bool
 617         default n
 618
 619 config SCHED_SMT
 620         bool "SMT (Hyperthreading) scheduler support"
 621         depends on PPC64 && SMP
 622         help
 623           SMT scheduler support improves the CPU scheduler's decision making
 624           when dealing with POWER5 cpus at a cost of slightly increased
 625           overhead in some places. If unsure say N here.
 626
 627 config PPC_DENORMALISATION
 628         bool "PowerPC denormalisation exception handling"
 629         depends on PPC_BOOK3S_64
 630         default "y" if PPC_POWERNV
 631         ---help---
 632           Add support for handling denormalisation of single precision
 633           values.  Useful for bare metal only.  If unsure say Y here.
 634
 635 config CMDLINE_BOOL
 636         bool "Default bootloader kernel arguments"
 637
 638 config CMDLINE
 639         string "Initial kernel command string"
 640         depends on CMDLINE_BOOL
 641         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 642         help
 643           On some platforms, there is currently no way for the boot loader to
 644           pass arguments to the kernel. For these platforms, you can supply
 645           some command-line options at build time by entering them here.  In
 646           most cases you will need to specify the root device here.
 647
 648 config CMDLINE_FORCE
 649         bool "Always use the default kernel command string"
 650         depends on CMDLINE_BOOL
 651         help
 652           Always use the default kernel command string, even if the boot
 653           loader passes other arguments to the kernel.
 654           This is useful if you cannot or don't want to change the
 655           command-line options your boot loader passes to the kernel.
 656
 657 config EXTRA_TARGETS
 658         string "Additional default image types"
 659         help
 660           List additional targets to be built by the bootwrapper here (separated
 661           by spaces).  This is useful for targets that depend of device tree
 662           files in the .dts directory.
 663
 664           Targets in this list will be build as part of the default build
 665           target, or when the user does a 'make zImage' or a
 666           'make zImage.initrd'.
 667
 668           If unsure, leave blank
 669
 670 config ARCH_WANTS_FREEZER_CONTROL
 671         def_bool y
 672         depends on ADB_PMU
 673
 674 source kernel/power/Kconfig
 675
 676 config SECCOMP
 677         bool "Enable seccomp to safely compute untrusted bytecode"
 678         depends on PROC_FS
 679         default y
 680         help
 681           This kernel feature is useful for number crunching applications
 682           that may need to compute untrusted bytecode during their
 683           execution. By using pipes or other transports made available to
 684           the process as file descriptors supporting the read/write
 685           syscalls, it's possible to isolate those applications in
 686           their own address space using seccomp. Once seccomp is
 687           enabled via /proc/<pid>/seccomp, it cannot be disabled
 688           and the task is only allowed to execute a few safe syscalls
 689           defined by each seccomp mode.
 690
 691           If unsure, say Y. Only embedded should say N here.
 692
 693 endmenu
 694
 695 config ISA_DMA_API
 696         bool
 697         default PCI
 698
 699 menu "Bus options"
 700
 701 config ISA
 702         bool "Support for ISA-bus hardware"
 703         depends on PPC_CHRP
 704         select PPC_I8259
 705         help
 706           Find out whether you have ISA slots on your motherboard.  ISA is the
 707           name of a bus system, i.e. the way the CPU talks to the other stuff
 708           inside your box.  If you have an Apple machine, say N here; if you
 709           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 710           embedded board, consult your board documentation.
 711
 712 config ZONE_DMA
 713         bool
 714         default y
 715
 716 config NEED_DMA_MAP_STATE
 717         def_bool (PPC64 || NOT_COHERENT_CACHE)
 718
 719 config NEED_SG_DMA_LENGTH
 720         def_bool y
 721
 722 config GENERIC_ISA_DMA
 723         bool
 724         depends on ISA_DMA_API
 725         default y
 726
 727 config PPC_INDIRECT_PCI
 728         bool
 729         depends on PCI
 730         default y if 40x || 44x
 731         default n
 732
 733 config EISA
 734         bool
 735
 736 config SBUS
 737         bool
 738
 739 config FSL_SOC
 740         bool
 741
 742 config FSL_PCI
 743         bool
 744         select PPC_INDIRECT_PCI
 745         select PCI_QUIRKS
 746
 747 config FSL_PMC
 748         bool
 749         default y
 750         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 751         help
 752           Freescale MPC85xx/MPC86xx power management controller support
 753           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 754
 755 config PPC4xx_CPM
 756         bool
 757         default y
 758         depends on SUSPEND && (44x || 40x)
 759         help
 760           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 761           It also enables support for two different idle states (idle-wait
 762           and idle-doze).
 763
 764 config 4xx_SOC
 765         bool
 766
 767 config FSL_LBC
 768         bool "Freescale Local Bus support"
 769         depends on FSL_SOC
 770         help
 771           Enables reporting of errors from the Freescale local bus
 772           controller.  Also contains some common code used by
 773           drivers for specific local bus peripherals.
 774
 775 config FSL_GTM
 776         bool
 777         depends on PPC_83xx || QUICC_ENGINE || CPM2
 778         help
 779           Freescale General-purpose Timers support
 780
 781 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 782 config MCA
 783         bool
 784
 785 # Platforms that what PCI turned unconditionally just do select PCI
 786 # in their config node.  Platforms that want to choose at config
 787 # time should select PPC_PCI_CHOICE
 788 config PPC_PCI_CHOICE
 789         bool
 790
 791 config PCI
 792         bool "PCI support" if PPC_PCI_CHOICE
 793         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 794                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 795         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 796         select GENERIC_PCI_IOMAP
 797         help
 798           Find out whether your system includes a PCI bus. PCI is the name of
 799           a bus system, i.e. the way the CPU talks to the other stuff inside
 800           your box.  If you say Y here, the kernel will include drivers and
 801           infrastructure code to support PCI bus devices.
 802
 803 config PCI_DOMAINS
 804         def_bool PCI
 805
 806 config PCI_SYSCALL
 807         def_bool PCI
 808
 809 config PCI_QSPAN
 810         bool "QSpan PCI"
 811         depends on !4xx && !CPM2 && 8xx
 812         select PPC_I8259
 813         help
 814           Say Y here if you have a system based on a Motorola 8xx-series
 815           embedded processor with a QSPAN PCI interface, otherwise say N.
 816
 817 config PCI_8260
 818         bool
 819         depends on PCI && 8260
 820         select PPC_INDIRECT_PCI
 821         default y
 822
 823 source "drivers/pci/pcie/Kconfig"
 824
 825 source "drivers/pci/Kconfig"
 826
 827 source "drivers/pcmcia/Kconfig"
 828
 829 source "drivers/pci/hotplug/Kconfig"
 830
 831 config HAS_RAPIDIO
 832         bool
 833         default n
 834
 835 config RAPIDIO
 836         tristate "RapidIO support"
 837         depends on HAS_RAPIDIO || PCI
 838         help
 839           If you say Y here, the kernel will include drivers and
 840           infrastructure code to support RapidIO interconnect devices.
 841
 842 config FSL_RIO
 843         bool "Freescale Embedded SRIO Controller support"
 844         depends on RAPIDIO = y && HAS_RAPIDIO
 845         default "n"
 846         ---help---
 847           Include support for RapidIO controller on Freescale embedded
 848           processors (MPC8548, MPC8641, etc).
 849
 850 source "drivers/rapidio/Kconfig"
 851
 852 endmenu
 853
 854 config NONSTATIC_KERNEL
 855         bool
 856         default n
 857
 858 menu "Advanced setup"
 859         depends on PPC32
 860
 861 config ADVANCED_OPTIONS
 862         bool "Prompt for advanced kernel configuration options"
 863         help
 864           This option will enable prompting for a variety of advanced kernel
 865           configuration options.  These options can cause the kernel to not
 866           work if they are set incorrectly, but can be used to optimize certain
 867           aspects of kernel memory management.
 868
 869           Unless you know what you are doing, say N here.
 870
 871 comment "Default settings for advanced configuration options are used"
 872         depends on !ADVANCED_OPTIONS
 873
 874 config LOWMEM_SIZE_BOOL
 875         bool "Set maximum low memory"
 876         depends on ADVANCED_OPTIONS
 877         help
 878           This option allows you to set the maximum amount of memory which
 879           will be used as "low memory", that is, memory which the kernel can
 880           access directly, without having to set up a kernel virtual mapping.
 881           This can be useful in optimizing the layout of kernel virtual
 882           memory.
 883
 884           Say N here unless you know what you are doing.
 885
 886 config LOWMEM_SIZE
 887         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 888         default "0x30000000"
 889
 890 config LOWMEM_CAM_NUM_BOOL
 891         bool "Set number of CAMs to use to map low memory"
 892         depends on ADVANCED_OPTIONS && FSL_BOOKE
 893         help
 894           This option allows you to set the maximum number of CAM slots that
 895           will be used to map low memory.  There are a limited number of slots
 896           available and even more limited number that will fit in the L1 MMU.
 897           However, using more entries will allow mapping more low memory.  This
 898           can be useful in optimizing the layout of kernel virtual memory.
 899
 900           Say N here unless you know what you are doing.
 901
 902 config LOWMEM_CAM_NUM
 903         depends on FSL_BOOKE
 904         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 905         default 3
 906
 907 config DYNAMIC_MEMSTART
 908         bool "Enable page aligned dynamic load address for kernel"
 909         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 910         select NONSTATIC_KERNEL
 911         help
 912           This option enables the kernel to be loaded at any page aligned
 913           physical address. The kernel creates a mapping from KERNELBASE to
 914           the address where the kernel is loaded. The page size here implies
 915           the TLB page size of the mapping for kernel on the particular platform.
 916           Please refer to the init code for finding the TLB page size.
 917
 918           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 919           kernel image, where the only restriction is the page aligned kernel
 920           load address. When this option is enabled, the compile time physical
 921           address CONFIG_PHYSICAL_START is ignored.
 922
 923           This option is overridden by CONFIG_RELOCATABLE
 924
 925 config RELOCATABLE
 926         bool "Build a relocatable kernel"
 927         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 928         select NONSTATIC_KERNEL
 929         help
 930           This builds a kernel image that is capable of running at the
 931           location the kernel is loaded at, without any alignment restrictions.
 932           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 933
 934           One use is for the kexec on panic case where the recovery kernel
 935           must live at a different physical address than the primary
 936           kernel.
 937
 938           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 939           it has been loaded at and the compile time physical addresses
 940           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 941           setting can still be useful to bootwrappers that need to know the
 942           load address of the kernel (eg. u-boot/mkimage).
 943
 944 config RELOCATABLE_PPC32
 945         def_bool y
 946         depends on PPC32 && RELOCATABLE
 947
 948 config PAGE_OFFSET_BOOL
 949         bool "Set custom page offset address"
 950         depends on ADVANCED_OPTIONS
 951         help
 952           This option allows you to set the kernel virtual address at which
 953           the kernel will map low memory.  This can be useful in optimizing
 954           the virtual memory layout of the system.
 955
 956           Say N here unless you know what you are doing.
 957
 958 config PAGE_OFFSET
 959         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 960         default "0xc0000000"
 961
 962 config KERNEL_START_BOOL
 963         bool "Set custom kernel base address"
 964         depends on ADVANCED_OPTIONS
 965         help
 966           This option allows you to set the kernel virtual address at which
 967           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 968           however there are times (like kdump) that one might not want them
 969           to be the same.
 970
 971           Say N here unless you know what you are doing.
 972
 973 config KERNEL_START
 974         hex "Virtual address of kernel base" if KERNEL_START_BOOL
 975         default PAGE_OFFSET if PAGE_OFFSET_BOOL
 976         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
 977         default "0xc0000000"
 978
 979 config PHYSICAL_START_BOOL
 980         bool "Set physical address where the kernel is loaded"
 981         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
 982         help
 983           This gives the physical address where the kernel is loaded.
 984
 985           Say N here unless you know what you are doing.
 986
 987 config PHYSICAL_START
 988         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
 989         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
 990         default "0x00000000"
 991
 992 config PHYSICAL_ALIGN
 993         hex
 994         default "0x04000000" if FSL_BOOKE
 995         help
 996           This value puts the alignment restrictions on physical address
 997           where kernel is loaded and run from. Kernel is compiled for an
 998           address which meets above alignment restriction.
 999
1000 config TASK_SIZE_BOOL
1001         bool "Set custom user task size"
1002         depends on ADVANCED_OPTIONS
1003         help
1004           This option allows you to set the amount of virtual address space
1005           allocated to user tasks.  This can be useful in optimizing the
1006           virtual memory layout of the system.
1007
1008           Say N here unless you know what you are doing.
1009
1010 config TASK_SIZE
1011         hex "Size of user task space" if TASK_SIZE_BOOL
1012         default "0x80000000" if PPC_8xx
1013         default "0xc0000000"
1014
1015 config CONSISTENT_SIZE_BOOL
1016         bool "Set custom consistent memory pool size"
1017         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1018         help
1019           This option allows you to set the size of the
1020           consistent memory pool.  This pool of virtual memory
1021           is used to make consistent memory allocations.
1022
1023 config CONSISTENT_SIZE
1024         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1025         default "0x00200000" if NOT_COHERENT_CACHE
1026
1027 config PIN_TLB
1028         bool "Pinned Kernel TLBs (860 ONLY)"
1029         depends on ADVANCED_OPTIONS && 8xx
1030 endmenu
1031
1032 if PPC64
1033 config RELOCATABLE
1034         bool "Build a relocatable kernel"
1035         depends on !COMPILE_TEST
1036         select NONSTATIC_KERNEL
1037         help
1038           This builds a kernel image that is capable of running anywhere
1039           in the RMA (real memory area) at any 16k-aligned base address.
1040           The kernel is linked as a position-independent executable (PIE)
1041           and contains dynamic relocations which are processed early
1042           in the bootup process.
1043
1044           One use is for the kexec on panic case where the recovery kernel
1045           must live at a different physical address than the primary
1046           kernel.
1047
1048 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1049 config PAGE_OFFSET
1050         hex
1051         default "0xc000000000000000"
1052 config KERNEL_START
1053         hex
1054         default "0xc000000000000000"
1055 config PHYSICAL_START
1056         hex
1057         default "0x00000000"
1058 endif
1059
1060 config  ARCH_RANDOM
1061         def_bool n
1062
1063 source "net/Kconfig"
1064
1065 source "drivers/Kconfig"
1066
1067 source "fs/Kconfig"
1068
1069 source "arch/powerpc/sysdev/qe_lib/Kconfig"
1070
1071 source "lib/Kconfig"
1072
1073 source "arch/powerpc/Kconfig.debug"
1074
1075 source "security/Kconfig"
1076
1077 config KEYS_COMPAT
1078         bool
1079         depends on COMPAT && KEYS
1080         default y
1081
1082 source "crypto/Kconfig"
1083
1084 config PPC_LIB_RHEAP
1085         bool
1086
1087 source "arch/powerpc/kvm/Kconfig"