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