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 ARCH_PHYS_ADDR_T_64BIT
  16        def_bool PPC64 || PHYS_64BIT
  17
  18 config ARCH_DMA_ADDR_T_64BIT
  19         def_bool ARCH_PHYS_ADDR_T_64BIT
  20
  21 config MMU
  22         bool
  23         default y
  24
  25 config HAVE_SETUP_PER_CPU_AREA
  26         def_bool PPC64
  27
  28 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  29         def_bool PPC64
  30
  31 config NR_IRQS
  32         int "Number of virtual interrupt numbers"
  33         range 32 32768
  34         default "512"
  35         help
  36           This defines the number of virtual interrupt numbers the kernel
  37           can manage. Virtual interrupt numbers are what you see in
  38           /proc/interrupts. If you configure your system to have too few,
  39           drivers will fail to load or worse - handle with care.
  40
  41 config STACKTRACE_SUPPORT
  42         bool
  43         default y
  44
  45 config TRACE_IRQFLAGS_SUPPORT
  46         bool
  47         default y
  48
  49 config LOCKDEP_SUPPORT
  50         bool
  51         default y
  52
  53 config RWSEM_GENERIC_SPINLOCK
  54         bool
  55
  56 config RWSEM_XCHGADD_ALGORITHM
  57         bool
  58         default y
  59
  60 config GENERIC_LOCKBREAK
  61         bool
  62         default y
  63         depends on SMP && PREEMPT
  64
  65 config ARCH_HAS_ILOG2_U32
  66         bool
  67         default y
  68
  69 config ARCH_HAS_ILOG2_U64
  70         bool
  71         default y if 64BIT
  72
  73 config GENERIC_HWEIGHT
  74         bool
  75         default y
  76
  77 config ARCH_HAS_DMA_SET_COHERENT_MASK
  78         bool
  79
  80 config PPC
  81         bool
  82         default y
  83         select BUILDTIME_EXTABLE_SORT
  84         select ARCH_MIGHT_HAVE_PC_PARPORT
  85         select ARCH_MIGHT_HAVE_PC_SERIO
  86         select BINFMT_ELF
  87         select ARCH_HAS_ELF_RANDOMIZE
  88         select OF
  89         select OF_EARLY_FLATTREE
  90         select OF_RESERVED_MEM
  91         select HAVE_FTRACE_MCOUNT_RECORD
  92         select HAVE_DYNAMIC_FTRACE
  93         select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
  94         select HAVE_FUNCTION_TRACER
  95         select HAVE_FUNCTION_GRAPH_TRACER
  96         select SYSCTL_EXCEPTION_TRACE
  97         select VIRT_TO_BUS if !PPC64
  98         select HAVE_IDE
  99         select HAVE_IOREMAP_PROT
 100         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
 101         select HAVE_KPROBES
 102         select HAVE_ARCH_KGDB
 103         select HAVE_KRETPROBES
 104         select HAVE_ARCH_TRACEHOOK
 105         select HAVE_MEMBLOCK
 106         select HAVE_MEMBLOCK_NODE_MAP
 107         select HAVE_DMA_API_DEBUG
 108         select HAVE_OPROFILE
 109         select HAVE_DEBUG_KMEMLEAK
 110         select ARCH_HAS_SG_CHAIN
 111         select GENERIC_ATOMIC64 if PPC32
 112         select HAVE_PERF_EVENTS
 113         select HAVE_PERF_REGS
 114         select HAVE_PERF_USER_STACK_DUMP
 115         select HAVE_REGS_AND_STACK_ACCESS_API
 116         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 117         select ARCH_WANT_IPC_PARSE_VERSION
 118         select SPARSE_IRQ
 119         select IRQ_DOMAIN
 120         select GENERIC_IRQ_SHOW
 121         select GENERIC_IRQ_SHOW_LEVEL
 122         select IRQ_FORCED_THREADING
 123         select HAVE_RCU_TABLE_FREE if SMP
 124         select HAVE_SYSCALL_TRACEPOINTS
 125         select HAVE_CBPF_JIT if !PPC64
 126         select HAVE_EBPF_JIT if PPC64
 127         select HAVE_ARCH_JUMP_LABEL
 128         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 129         select ARCH_HAS_GCOV_PROFILE_ALL
 130         select GENERIC_SMP_IDLE_THREAD
 131         select GENERIC_CMOS_UPDATE
 132         select GENERIC_TIME_VSYSCALL_OLD
 133         select GENERIC_CLOCKEVENTS
 134         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 135         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 136         select GENERIC_STRNCPY_FROM_USER
 137         select GENERIC_STRNLEN_USER
 138         select HAVE_MOD_ARCH_SPECIFIC
 139         select MODULES_USE_ELF_RELA
 140         select CLONE_BACKWARDS
 141         select ARCH_USE_BUILTIN_BSWAP
 142         select OLD_SIGSUSPEND
 143         select OLD_SIGACTION if PPC32
 144         select HAVE_DEBUG_STACKOVERFLOW
 145         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 146         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 147         select HAVE_ARCH_AUDITSYSCALL
 148         select ARCH_SUPPORTS_ATOMIC_RMW
 149         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 150         select NO_BOOTMEM
 151         select HAVE_GENERIC_RCU_GUP
 152         select HAVE_PERF_EVENTS_NMI if PPC64
 153         select HAVE_NMI if PERF_EVENTS
 154         select EDAC_SUPPORT
 155         select EDAC_ATOMIC_SCRUB
 156         select ARCH_HAS_DMA_SET_COHERENT_MASK
 157         select ARCH_HAS_DEVMEM_IS_ALLOWED
 158         select HAVE_ARCH_SECCOMP_FILTER
 159         select ARCH_HAS_UBSAN_SANITIZE_ALL
 160         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 161         select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
 162         select GENERIC_CPU_AUTOPROBE
 163         select HAVE_VIRT_CPU_ACCOUNTING
 164         select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
 165         select HAVE_ARCH_HARDENED_USERCOPY
 166         select HAVE_KERNEL_GZIP
 167         select HAVE_CC_STACKPROTECTOR
 168
 169 config GENERIC_CSUM
 170         def_bool CPU_LITTLE_ENDIAN
 171
 172 config EARLY_PRINTK
 173         bool
 174         default y
 175
 176 config PANIC_TIMEOUT
 177         int
 178         default 180
 179
 180 config COMPAT
 181         bool
 182         default y if PPC64
 183         select COMPAT_BINFMT_ELF
 184         select ARCH_WANT_OLD_COMPAT_IPC
 185         select COMPAT_OLD_SIGACTION
 186
 187 config SYSVIPC_COMPAT
 188         bool
 189         depends on COMPAT && SYSVIPC
 190         default y
 191
 192 # All PPC32s use generic nvram driver through ppc_md
 193 config GENERIC_NVRAM
 194         bool
 195         default y if PPC32
 196
 197 config SCHED_OMIT_FRAME_POINTER
 198         bool
 199         default y
 200
 201 config ARCH_MAY_HAVE_PC_FDC
 202         bool
 203         default PCI
 204
 205 config PPC_UDBG_16550
 206         bool
 207         default n
 208
 209 config GENERIC_TBSYNC
 210         bool
 211         default y if PPC32 && SMP
 212         default n
 213
 214 config AUDIT_ARCH
 215         bool
 216         default y
 217
 218 config GENERIC_BUG
 219         bool
 220         default y
 221         depends on BUG
 222
 223 config SYS_SUPPORTS_APM_EMULATION
 224         default y if PMAC_APM_EMU
 225         bool
 226
 227 config EPAPR_BOOT
 228         bool
 229         help
 230           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 231         default n
 232
 233 config DEFAULT_UIMAGE
 234         bool
 235         help
 236           Used to allow a board to specify it wants a uImage built by default
 237         default n
 238
 239 config ARCH_HIBERNATION_POSSIBLE
 240         bool
 241         default y
 242
 243 config ARCH_SUSPEND_POSSIBLE
 244         def_bool y
 245         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 246                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 247                    || 44x || 40x
 248
 249 config PPC_DCR_NATIVE
 250         bool
 251         default n
 252
 253 config PPC_DCR_MMIO
 254         bool
 255         default n
 256
 257 config PPC_DCR
 258         bool
 259         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 260         default y
 261
 262 config PPC_OF_PLATFORM_PCI
 263         bool
 264         depends on PCI
 265         depends on PPC64 # not supported on 32 bits yet
 266         default n
 267
 268 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 269         depends on PPC32 || PPC_STD_MMU_64
 270         def_bool y
 271
 272 config ARCH_SUPPORTS_UPROBES
 273         def_bool y
 274
 275 config PPC_ADV_DEBUG_REGS
 276         bool
 277         depends on 40x || BOOKE
 278         default y
 279
 280 config PPC_ADV_DEBUG_IACS
 281         int
 282         depends on PPC_ADV_DEBUG_REGS
 283         default 4 if 44x
 284         default 2
 285
 286 config PPC_ADV_DEBUG_DACS
 287         int
 288         depends on PPC_ADV_DEBUG_REGS
 289         default 2
 290
 291 config PPC_ADV_DEBUG_DVCS
 292         int
 293         depends on PPC_ADV_DEBUG_REGS
 294         default 2 if 44x
 295         default 0
 296
 297 config PPC_ADV_DEBUG_DAC_RANGE
 298         bool
 299         depends on PPC_ADV_DEBUG_REGS && 44x
 300         default y
 301
 302 config PPC_EMULATE_SSTEP
 303         bool
 304         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 305
 306 config ZONE_DMA32
 307         bool
 308         default y if PPC64
 309
 310 config PGTABLE_LEVELS
 311         int
 312         default 2 if !PPC64
 313         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 314         default 4
 315
 316 source "init/Kconfig"
 317
 318 source "kernel/Kconfig.freezer"
 319
 320 source "arch/powerpc/sysdev/Kconfig"
 321 source "arch/powerpc/platforms/Kconfig"
 322
 323 menu "Kernel options"
 324
 325 config HIGHMEM
 326         bool "High memory support"
 327         depends on PPC32
 328
 329 source kernel/Kconfig.hz
 330 source kernel/Kconfig.preempt
 331 source "fs/Kconfig.binfmt"
 332
 333 config HUGETLB_PAGE_SIZE_VARIABLE
 334         bool
 335         depends on HUGETLB_PAGE
 336         default y
 337
 338 config MATH_EMULATION
 339         bool "Math emulation"
 340         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 341         ---help---
 342           Some PowerPC chips designed for embedded applications do not have
 343           a floating-point unit and therefore do not implement the
 344           floating-point instructions in the PowerPC instruction set.  If you
 345           say Y here, the kernel will include code to emulate a floating-point
 346           unit, which will allow programs that use floating-point
 347           instructions to run.
 348
 349           This is also useful to emulate missing (optional) instructions
 350           such as fsqrt on cores that do have an FPU but do not implement
 351           them (such as Freescale BookE).
 352
 353 choice
 354         prompt "Math emulation options"
 355         default MATH_EMULATION_FULL
 356         depends on MATH_EMULATION
 357
 358 config  MATH_EMULATION_FULL
 359         bool "Emulate all the floating point instructions"
 360         ---help---
 361           Select this option will enable the kernel to support to emulate
 362           all the floating point instructions. If your SoC doesn't have
 363           a FPU, you should select this.
 364
 365 config MATH_EMULATION_HW_UNIMPLEMENTED
 366         bool "Just emulate the FPU unimplemented instructions"
 367         ---help---
 368           Select this if you know there does have a hardware FPU on your
 369           SoC, but some floating point instructions are not implemented by that.
 370
 371 endchoice
 372
 373 config PPC_TRANSACTIONAL_MEM
 374        bool "Transactional Memory support for POWERPC"
 375        depends on PPC_BOOK3S_64
 376        depends on SMP
 377        select ALTIVEC
 378        select VSX
 379        default n
 380        ---help---
 381          Support user-mode Transactional Memory on POWERPC.
 382
 383 config DISABLE_MPROFILE_KERNEL
 384         bool "Disable use of mprofile-kernel for kernel tracing"
 385         depends on PPC64 && CPU_LITTLE_ENDIAN
 386         default y
 387         help
 388           Selecting this options disables use of the mprofile-kernel ABI for
 389           kernel tracing. That will cause options such as live patching
 390           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 391           be disabled also.
 392
 393           If you have a toolchain which supports mprofile-kernel, then you can
 394           enable this. Otherwise leave it disabled. If you're not sure, say
 395           "N".
 396
 397 config MPROFILE_KERNEL
 398         depends on PPC64 && CPU_LITTLE_ENDIAN
 399         def_bool !DISABLE_MPROFILE_KERNEL
 400
 401 config USE_THIN_ARCHIVES
 402         bool "Build the kernel using thin archives"
 403         default n
 404         select THIN_ARCHIVES
 405         help
 406           Build the kernel using thin archives.
 407           If you're unsure say N.
 408
 409 config IOMMU_HELPER
 410         def_bool PPC64
 411
 412 config SWIOTLB
 413         bool "SWIOTLB support"
 414         default n
 415         select IOMMU_HELPER
 416         ---help---
 417           Support for IO bounce buffering for systems without an IOMMU.
 418           This allows us to DMA to the full physical address space on
 419           platforms where the size of a physical address is larger
 420           than the bus address.  Not all platforms support this.
 421
 422 config HOTPLUG_CPU
 423         bool "Support for enabling/disabling CPUs"
 424         depends on SMP && (PPC_PSERIES || \
 425         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 426         ---help---
 427           Say Y here to be able to disable and re-enable individual
 428           CPUs at runtime on SMP machines.
 429
 430           Say N if you are unsure.
 431
 432 config ARCH_CPU_PROBE_RELEASE
 433         def_bool y
 434         depends on HOTPLUG_CPU
 435
 436 config ARCH_ENABLE_MEMORY_HOTPLUG
 437         def_bool y
 438
 439 config ARCH_HAS_WALK_MEMORY
 440         def_bool y
 441
 442 config ARCH_ENABLE_MEMORY_HOTREMOVE
 443         def_bool y
 444
 445 config PPC64_SUPPORTS_MEMORY_FAILURE
 446         bool "Add support for memory hwpoison"
 447         depends on PPC_BOOK3S_64
 448         default "y" if PPC_POWERNV
 449         select ARCH_SUPPORTS_MEMORY_FAILURE
 450
 451 config KEXEC
 452         bool "kexec system call"
 453         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 454         select KEXEC_CORE
 455         help
 456           kexec is a system call that implements the ability to shutdown your
 457           current kernel, and to start another kernel.  It is like a reboot
 458           but it is independent of the system firmware.   And like a reboot
 459           you can start any kernel with it, not just Linux.
 460
 461           The name comes from the similarity to the exec system call.
 462
 463           It is an ongoing process to be certain the hardware in a machine
 464           is properly shutdown, so do not be surprised if this code does not
 465           initially work for you.  As of this writing the exact hardware
 466           interface is strongly in flux, so no good recommendation can be
 467           made.
 468
 469 config KEXEC_FILE
 470         bool "kexec file based system call"
 471         select KEXEC_CORE
 472         select BUILD_BIN2C
 473         depends on PPC64
 474         depends on CRYPTO=y
 475         depends on CRYPTO_SHA256=y
 476         help
 477           This is a new version of the kexec system call. This call is
 478           file based and takes in file descriptors as system call arguments
 479           for kernel and initramfs as opposed to a list of segments as is the
 480           case for the older kexec call.
 481
 482 config RELOCATABLE
 483         bool "Build a relocatable kernel"
 484         depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
 485         select NONSTATIC_KERNEL
 486         help
 487           This builds a kernel image that is capable of running at the
 488           location the kernel is loaded at. For ppc32, there is no any
 489           alignment restrictions, and this feature is a superset of
 490           DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 491           16k-aligned base address. The kernel is linked as a
 492           position-independent executable (PIE) and contains dynamic relocations
 493           which are processed early in the bootup process.
 494
 495           One use is for the kexec on panic case where the recovery kernel
 496           must live at a different physical address than the primary
 497           kernel.
 498
 499           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 500           it has been loaded at and the compile time physical addresses
 501           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 502           setting can still be useful to bootwrappers that need to know the
 503           load address of the kernel (eg. u-boot/mkimage).
 504
 505 config RELOCATABLE_TEST
 506         bool "Test relocatable kernel"
 507         depends on (PPC64 && RELOCATABLE)
 508         default n
 509         help
 510           This runs the relocatable kernel at the address it was initially
 511           loaded at, which tends to be non-zero and therefore test the
 512           relocation code.
 513
 514 config CRASH_DUMP
 515         bool "Build a kdump crash kernel"
 516         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 517         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 518         help
 519           Build a kernel suitable for use as a kdump capture kernel.
 520           The same kernel binary can be used as production kernel and dump
 521           capture kernel.
 522
 523 config FA_DUMP
 524         bool "Firmware-assisted dump"
 525         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC_CORE
 526         help
 527           A robust mechanism to get reliable kernel crash dump with
 528           assistance from firmware. This approach does not use kexec,
 529           instead firmware assists in booting the kdump kernel
 530           while preserving memory contents. Firmware-assisted dump
 531           is meant to be a kdump replacement offering robustness and
 532           speed not possible without system firmware assistance.
 533
 534           If unsure, say "N"
 535
 536 config IRQ_ALL_CPUS
 537         bool "Distribute interrupts on all CPUs by default"
 538         depends on SMP
 539         help
 540           This option gives the kernel permission to distribute IRQs across
 541           multiple CPUs.  Saying N here will route all IRQs to the first
 542           CPU.  Generally saying Y is safe, although some problems have been
 543           reported with SMP Power Macintoshes with this option enabled.
 544
 545 config NUMA
 546         bool "NUMA support"
 547         depends on PPC64
 548         default y if SMP && PPC_PSERIES
 549
 550 config NODES_SHIFT
 551         int
 552         default "8" if PPC64
 553         default "4"
 554         depends on NEED_MULTIPLE_NODES
 555
 556 config USE_PERCPU_NUMA_NODE_ID
 557         def_bool y
 558         depends on NUMA
 559
 560 config HAVE_MEMORYLESS_NODES
 561         def_bool y
 562         depends on NUMA
 563
 564 config ARCH_SELECT_MEMORY_MODEL
 565         def_bool y
 566         depends on PPC64
 567
 568 config ARCH_FLATMEM_ENABLE
 569         def_bool y
 570         depends on (PPC64 && !NUMA) || PPC32
 571
 572 config ARCH_SPARSEMEM_ENABLE
 573         def_bool y
 574         depends on PPC64
 575         select SPARSEMEM_VMEMMAP_ENABLE
 576
 577 config ARCH_SPARSEMEM_DEFAULT
 578         def_bool y
 579         depends on (SMP && PPC_PSERIES) || PPC_PS3
 580
 581 config SYS_SUPPORTS_HUGETLBFS
 582         bool
 583
 584 config ILLEGAL_POINTER_VALUE
 585         hex
 586         # This is roughly half way between the top of user space and the bottom
 587         # of kernel space, which seems about as good as we can get.
 588         default 0x5deadbeef0000000 if PPC64
 589         default 0
 590
 591 source "mm/Kconfig"
 592
 593 config ARCH_MEMORY_PROBE
 594         def_bool y
 595         depends on MEMORY_HOTPLUG
 596
 597 # Some NUMA nodes have memory ranges that span
 598 # other nodes.  Even though a pfn is valid and
 599 # between a node's start and end pfns, it may not
 600 # reside on that node.  See memmap_init_zone()
 601 # for details.
 602 config NODES_SPAN_OTHER_NODES
 603         def_bool y
 604         depends on NEED_MULTIPLE_NODES
 605
 606 config STDBINUTILS
 607         bool "Using standard binutils settings"
 608         depends on 44x
 609         default y
 610         help
 611           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 612           Note, that kernel will be able to run only those applications,
 613           which had been compiled using binutils later than 2.17.50.0.3 with
 614           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 615           the older binutils, you can patch them with a trivial patch, which
 616           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 617
 618 choice
 619         prompt "Page size"
 620         default PPC_4K_PAGES
 621         help
 622           Select the kernel logical page size. Increasing the page size
 623           will reduce software overhead at each page boundary, allow
 624           hardware prefetch mechanisms to be more effective, and allow
 625           larger dma transfers increasing IO efficiency and reducing
 626           overhead. However the utilization of memory will increase.
 627           For example, each cached file will using a multiple of the
 628           page size to hold its contents and the difference between the
 629           end of file and the end of page is wasted.
 630
 631           Some dedicated systems, such as software raid serving with
 632           accelerated calculations, have shown significant increases.
 633
 634           If you configure a 64 bit kernel for 64k pages but the
 635           processor does not support them, then the kernel will simulate
 636           them with 4k pages, loading them on demand, but with the
 637           reduced software overhead and larger internal fragmentation.
 638           For the 32 bit kernel, a large page option will not be offered
 639           unless it is supported by the configured processor.
 640
 641           If unsure, choose 4K_PAGES.
 642
 643 config PPC_4K_PAGES
 644         bool "4k page size"
 645         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 646
 647 config PPC_16K_PAGES
 648         bool "16k page size"
 649         depends on 44x || PPC_8xx
 650
 651 config PPC_64K_PAGES
 652         bool "64k page size"
 653         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 654         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 655
 656 config PPC_256K_PAGES
 657         bool "256k page size"
 658         depends on 44x && !STDBINUTILS
 659         help
 660           Make the page size 256k.
 661
 662           As the ELF standard only requires alignment to support page
 663           sizes up to 64k, you will need to compile all of your user
 664           space applications with a non-standard binutils settings
 665           (see the STDBINUTILS description for details).
 666
 667           Say N unless you know what you are doing.
 668
 669 endchoice
 670
 671 config FORCE_MAX_ZONEORDER
 672         int "Maximum zone order"
 673         range 8 9 if PPC64 && PPC_64K_PAGES
 674         default "9" if PPC64 && PPC_64K_PAGES
 675         range 13 13 if PPC64 && !PPC_64K_PAGES
 676         default "13" if PPC64 && !PPC_64K_PAGES
 677         range 9 64 if PPC32 && PPC_16K_PAGES
 678         default "9" if PPC32 && PPC_16K_PAGES
 679         range 7 64 if PPC32 && PPC_64K_PAGES
 680         default "7" if PPC32 && PPC_64K_PAGES
 681         range 5 64 if PPC32 && PPC_256K_PAGES
 682         default "5" if PPC32 && PPC_256K_PAGES
 683         range 11 64
 684         default "11"
 685         help
 686           The kernel memory allocator divides physically contiguous memory
 687           blocks into "zones", where each zone is a power of two number of
 688           pages.  This option selects the largest power of two that the kernel
 689           keeps in the memory allocator.  If you need to allocate very large
 690           blocks of physically contiguous memory, then you may need to
 691           increase this value.
 692
 693           This config option is actually maximum order plus one. For example,
 694           a value of 11 means that the largest free memory block is 2^10 pages.
 695
 696           The page size is not necessarily 4KB.  For example, on 64-bit
 697           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 698           this in mind when choosing a value for this option.
 699
 700 config PPC_SUBPAGE_PROT
 701         bool "Support setting protections for 4k subpages"
 702         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 703         help
 704           This option adds support for a system call to allow user programs
 705           to set access permissions (read/write, readonly, or no access)
 706           on the 4k subpages of each 64k page.
 707
 708 config PPC_COPRO_BASE
 709         bool
 710         default n
 711
 712 config SCHED_SMT
 713         bool "SMT (Hyperthreading) scheduler support"
 714         depends on PPC64 && SMP
 715         help
 716           SMT scheduler support improves the CPU scheduler's decision making
 717           when dealing with POWER5 cpus at a cost of slightly increased
 718           overhead in some places. If unsure say N here.
 719
 720 config PPC_DENORMALISATION
 721         bool "PowerPC denormalisation exception handling"
 722         depends on PPC_BOOK3S_64
 723         default "y" if PPC_POWERNV
 724         ---help---
 725           Add support for handling denormalisation of single precision
 726           values.  Useful for bare metal only.  If unsure say Y here.
 727
 728 config CMDLINE_BOOL
 729         bool "Default bootloader kernel arguments"
 730
 731 config CMDLINE
 732         string "Initial kernel command string"
 733         depends on CMDLINE_BOOL
 734         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 735         help
 736           On some platforms, there is currently no way for the boot loader to
 737           pass arguments to the kernel. For these platforms, you can supply
 738           some command-line options at build time by entering them here.  In
 739           most cases you will need to specify the root device here.
 740
 741 config CMDLINE_FORCE
 742         bool "Always use the default kernel command string"
 743         depends on CMDLINE_BOOL
 744         help
 745           Always use the default kernel command string, even if the boot
 746           loader passes other arguments to the kernel.
 747           This is useful if you cannot or don't want to change the
 748           command-line options your boot loader passes to the kernel.
 749
 750 config EXTRA_TARGETS
 751         string "Additional default image types"
 752         help
 753           List additional targets to be built by the bootwrapper here (separated
 754           by spaces).  This is useful for targets that depend of device tree
 755           files in the .dts directory.
 756
 757           Targets in this list will be build as part of the default build
 758           target, or when the user does a 'make zImage' or a
 759           'make zImage.initrd'.
 760
 761           If unsure, leave blank
 762
 763 config ARCH_WANTS_FREEZER_CONTROL
 764         def_bool y
 765         depends on ADB_PMU
 766
 767 source kernel/power/Kconfig
 768
 769 config SECCOMP
 770         bool "Enable seccomp to safely compute untrusted bytecode"
 771         depends on PROC_FS
 772         default y
 773         help
 774           This kernel feature is useful for number crunching applications
 775           that may need to compute untrusted bytecode during their
 776           execution. By using pipes or other transports made available to
 777           the process as file descriptors supporting the read/write
 778           syscalls, it's possible to isolate those applications in
 779           their own address space using seccomp. Once seccomp is
 780           enabled via /proc/<pid>/seccomp, it cannot be disabled
 781           and the task is only allowed to execute a few safe syscalls
 782           defined by each seccomp mode.
 783
 784           If unsure, say Y. Only embedded should say N here.
 785
 786 endmenu
 787
 788 config ISA_DMA_API
 789         bool
 790         default PCI
 791
 792 menu "Bus options"
 793
 794 config ISA
 795         bool "Support for ISA-bus hardware"
 796         depends on PPC_CHRP
 797         select PPC_I8259
 798         help
 799           Find out whether you have ISA slots on your motherboard.  ISA is the
 800           name of a bus system, i.e. the way the CPU talks to the other stuff
 801           inside your box.  If you have an Apple machine, say N here; if you
 802           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 803           embedded board, consult your board documentation.
 804
 805 config ZONE_DMA
 806         bool
 807         default y
 808
 809 config NEED_DMA_MAP_STATE
 810         def_bool (PPC64 || NOT_COHERENT_CACHE)
 811
 812 config NEED_SG_DMA_LENGTH
 813         def_bool y
 814
 815 config GENERIC_ISA_DMA
 816         bool
 817         depends on ISA_DMA_API
 818         default y
 819
 820 config PPC_INDIRECT_PCI
 821         bool
 822         depends on PCI
 823         default y if 40x || 44x
 824         default n
 825
 826 config EISA
 827         bool
 828
 829 config SBUS
 830         bool
 831
 832 config FSL_SOC
 833         bool
 834
 835 config FSL_PCI
 836         bool
 837         select PPC_INDIRECT_PCI
 838         select PCI_QUIRKS
 839
 840 config FSL_PMC
 841         bool
 842         default y
 843         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 844         help
 845           Freescale MPC85xx/MPC86xx power management controller support
 846           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 847
 848 config PPC4xx_CPM
 849         bool
 850         default y
 851         depends on SUSPEND && (44x || 40x)
 852         help
 853           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 854           It also enables support for two different idle states (idle-wait
 855           and idle-doze).
 856
 857 config 4xx_SOC
 858         bool
 859
 860 config FSL_LBC
 861         bool "Freescale Local Bus support"
 862         help
 863           Enables reporting of errors from the Freescale local bus
 864           controller.  Also contains some common code used by
 865           drivers for specific local bus peripherals.
 866
 867 config FSL_GTM
 868         bool
 869         depends on PPC_83xx || QUICC_ENGINE || CPM2
 870         help
 871           Freescale General-purpose Timers support
 872
 873 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 874 config MCA
 875         bool
 876
 877 # Platforms that what PCI turned unconditionally just do select PCI
 878 # in their config node.  Platforms that want to choose at config
 879 # time should select PPC_PCI_CHOICE
 880 config PPC_PCI_CHOICE
 881         bool
 882
 883 config PCI
 884         bool "PCI support" if PPC_PCI_CHOICE
 885         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 886                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 887         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 888         select GENERIC_PCI_IOMAP
 889         help
 890           Find out whether your system includes a PCI bus. PCI is the name of
 891           a bus system, i.e. the way the CPU talks to the other stuff inside
 892           your box.  If you say Y here, the kernel will include drivers and
 893           infrastructure code to support PCI bus devices.
 894
 895 config PCI_DOMAINS
 896         def_bool PCI
 897
 898 config PCI_SYSCALL
 899         def_bool PCI
 900
 901 config PCI_QSPAN
 902         bool "QSpan PCI"
 903         depends on !4xx && !CPM2 && 8xx
 904         select PPC_I8259
 905         help
 906           Say Y here if you have a system based on a Motorola 8xx-series
 907           embedded processor with a QSPAN PCI interface, otherwise say N.
 908
 909 config PCI_8260
 910         bool
 911         depends on PCI && 8260
 912         select PPC_INDIRECT_PCI
 913         default y
 914
 915 source "drivers/pci/Kconfig"
 916
 917 source "drivers/pcmcia/Kconfig"
 918
 919 config HAS_RAPIDIO
 920         bool
 921         default n
 922
 923 config RAPIDIO
 924         tristate "RapidIO support"
 925         depends on HAS_RAPIDIO || PCI
 926         help
 927           If you say Y here, the kernel will include drivers and
 928           infrastructure code to support RapidIO interconnect devices.
 929
 930 config FSL_RIO
 931         bool "Freescale Embedded SRIO Controller support"
 932         depends on RAPIDIO = y && HAS_RAPIDIO
 933         default "n"
 934         ---help---
 935           Include support for RapidIO controller on Freescale embedded
 936           processors (MPC8548, MPC8641, etc).
 937
 938 source "drivers/rapidio/Kconfig"
 939
 940 endmenu
 941
 942 config NONSTATIC_KERNEL
 943         bool
 944         default n
 945
 946 menu "Advanced setup"
 947         depends on PPC32
 948
 949 config ADVANCED_OPTIONS
 950         bool "Prompt for advanced kernel configuration options"
 951         help
 952           This option will enable prompting for a variety of advanced kernel
 953           configuration options.  These options can cause the kernel to not
 954           work if they are set incorrectly, but can be used to optimize certain
 955           aspects of kernel memory management.
 956
 957           Unless you know what you are doing, say N here.
 958
 959 comment "Default settings for advanced configuration options are used"
 960         depends on !ADVANCED_OPTIONS
 961
 962 config LOWMEM_SIZE_BOOL
 963         bool "Set maximum low memory"
 964         depends on ADVANCED_OPTIONS
 965         help
 966           This option allows you to set the maximum amount of memory which
 967           will be used as "low memory", that is, memory which the kernel can
 968           access directly, without having to set up a kernel virtual mapping.
 969           This can be useful in optimizing the layout of kernel virtual
 970           memory.
 971
 972           Say N here unless you know what you are doing.
 973
 974 config LOWMEM_SIZE
 975         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 976         default "0x30000000"
 977
 978 config LOWMEM_CAM_NUM_BOOL
 979         bool "Set number of CAMs to use to map low memory"
 980         depends on ADVANCED_OPTIONS && FSL_BOOKE
 981         help
 982           This option allows you to set the maximum number of CAM slots that
 983           will be used to map low memory.  There are a limited number of slots
 984           available and even more limited number that will fit in the L1 MMU.
 985           However, using more entries will allow mapping more low memory.  This
 986           can be useful in optimizing the layout of kernel virtual memory.
 987
 988           Say N here unless you know what you are doing.
 989
 990 config LOWMEM_CAM_NUM
 991         depends on FSL_BOOKE
 992         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 993         default 3
 994
 995 config DYNAMIC_MEMSTART
 996         bool "Enable page aligned dynamic load address for kernel"
 997         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 998         select NONSTATIC_KERNEL
 999         help
1000           This option enables the kernel to be loaded at any page aligned
1001           physical address. The kernel creates a mapping from KERNELBASE to
1002           the address where the kernel is loaded. The page size here implies
1003           the TLB page size of the mapping for kernel on the particular platform.
1004           Please refer to the init code for finding the TLB page size.
1005
1006           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1007           kernel image, where the only restriction is the page aligned kernel
1008           load address. When this option is enabled, the compile time physical
1009           address CONFIG_PHYSICAL_START is ignored.
1010
1011           This option is overridden by CONFIG_RELOCATABLE
1012
1013 config PAGE_OFFSET_BOOL
1014         bool "Set custom page offset address"
1015         depends on ADVANCED_OPTIONS
1016         help
1017           This option allows you to set the kernel virtual address at which
1018           the kernel will map low memory.  This can be useful in optimizing
1019           the virtual memory layout of the system.
1020
1021           Say N here unless you know what you are doing.
1022
1023 config PAGE_OFFSET
1024         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1025         default "0xc0000000"
1026
1027 config KERNEL_START_BOOL
1028         bool "Set custom kernel base address"
1029         depends on ADVANCED_OPTIONS
1030         help
1031           This option allows you to set the kernel virtual address at which
1032           the kernel will be loaded.  Normally this should match PAGE_OFFSET
1033           however there are times (like kdump) that one might not want them
1034           to be the same.
1035
1036           Say N here unless you know what you are doing.
1037
1038 config KERNEL_START
1039         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1040         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1041         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1042         default "0xc0000000"
1043
1044 config PHYSICAL_START_BOOL
1045         bool "Set physical address where the kernel is loaded"
1046         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1047         help
1048           This gives the physical address where the kernel is loaded.
1049
1050           Say N here unless you know what you are doing.
1051
1052 config PHYSICAL_START
1053         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1054         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1055         default "0x00000000"
1056
1057 config PHYSICAL_ALIGN
1058         hex
1059         default "0x04000000" if FSL_BOOKE
1060         help
1061           This value puts the alignment restrictions on physical address
1062           where kernel is loaded and run from. Kernel is compiled for an
1063           address which meets above alignment restriction.
1064
1065 config TASK_SIZE_BOOL
1066         bool "Set custom user task size"
1067         depends on ADVANCED_OPTIONS
1068         help
1069           This option allows you to set the amount of virtual address space
1070           allocated to user tasks.  This can be useful in optimizing the
1071           virtual memory layout of the system.
1072
1073           Say N here unless you know what you are doing.
1074
1075 config TASK_SIZE
1076         hex "Size of user task space" if TASK_SIZE_BOOL
1077         default "0x80000000" if PPC_8xx
1078         default "0xc0000000"
1079
1080 config CONSISTENT_SIZE_BOOL
1081         bool "Set custom consistent memory pool size"
1082         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1083         help
1084           This option allows you to set the size of the
1085           consistent memory pool.  This pool of virtual memory
1086           is used to make consistent memory allocations.
1087
1088 config CONSISTENT_SIZE
1089         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1090         default "0x00200000" if NOT_COHERENT_CACHE
1091
1092 config PIN_TLB
1093         bool "Pinned Kernel TLBs (860 ONLY)"
1094         depends on ADVANCED_OPTIONS && 8xx
1095
1096 config PIN_TLB_IMMR
1097         bool "Pinned TLB for IMMR"
1098         depends on PIN_TLB
1099         default y
1100 endmenu
1101
1102 if PPC64
1103 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1104 config PAGE_OFFSET
1105         hex
1106         default "0xc000000000000000"
1107 config KERNEL_START
1108         hex
1109         default "0xc000000000000000"
1110 config PHYSICAL_START
1111         hex
1112         default "0x00000000"
1113 endif
1114
1115 config  ARCH_RANDOM
1116         def_bool n
1117
1118 source "net/Kconfig"
1119
1120 source "drivers/Kconfig"
1121
1122 source "fs/Kconfig"
1123
1124 source "lib/Kconfig"
1125
1126 source "arch/powerpc/Kconfig.debug"
1127
1128 source "security/Kconfig"
1129
1130 config KEYS_COMPAT
1131         bool
1132         depends on COMPAT && KEYS
1133         default y
1134
1135 source "crypto/Kconfig"
1136
1137 config PPC_LIB_RHEAP
1138         bool
1139
1140 source "arch/powerpc/kvm/Kconfig"
1141
1142 source "kernel/livepatch/Kconfig"