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
 168 config GENERIC_CSUM
 169         def_bool CPU_LITTLE_ENDIAN
 170
 171 config EARLY_PRINTK
 172         bool
 173         default y
 174
 175 config PANIC_TIMEOUT
 176         int
 177         default 180
 178
 179 config COMPAT
 180         bool
 181         default y if PPC64
 182         select COMPAT_BINFMT_ELF
 183         select ARCH_WANT_OLD_COMPAT_IPC
 184         select COMPAT_OLD_SIGACTION
 185
 186 config SYSVIPC_COMPAT
 187         bool
 188         depends on COMPAT && SYSVIPC
 189         default y
 190
 191 # All PPC32s use generic nvram driver through ppc_md
 192 config GENERIC_NVRAM
 193         bool
 194         default y if PPC32
 195
 196 config SCHED_OMIT_FRAME_POINTER
 197         bool
 198         default y
 199
 200 config ARCH_MAY_HAVE_PC_FDC
 201         bool
 202         default PCI
 203
 204 config PPC_UDBG_16550
 205         bool
 206         default n
 207
 208 config GENERIC_TBSYNC
 209         bool
 210         default y if PPC32 && SMP
 211         default n
 212
 213 config AUDIT_ARCH
 214         bool
 215         default y
 216
 217 config GENERIC_BUG
 218         bool
 219         default y
 220         depends on BUG
 221
 222 config SYS_SUPPORTS_APM_EMULATION
 223         default y if PMAC_APM_EMU
 224         bool
 225
 226 config EPAPR_BOOT
 227         bool
 228         help
 229           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 230         default n
 231
 232 config DEFAULT_UIMAGE
 233         bool
 234         help
 235           Used to allow a board to specify it wants a uImage built by default
 236         default n
 237
 238 config ARCH_HIBERNATION_POSSIBLE
 239         bool
 240         default y
 241
 242 config ARCH_SUSPEND_POSSIBLE
 243         def_bool y
 244         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 245                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 246                    || 44x || 40x
 247
 248 config PPC_DCR_NATIVE
 249         bool
 250         default n
 251
 252 config PPC_DCR_MMIO
 253         bool
 254         default n
 255
 256 config PPC_DCR
 257         bool
 258         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 259         default y
 260
 261 config PPC_OF_PLATFORM_PCI
 262         bool
 263         depends on PCI
 264         depends on PPC64 # not supported on 32 bits yet
 265         default n
 266
 267 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 268         depends on PPC32 || PPC_STD_MMU_64
 269         def_bool y
 270
 271 config ARCH_SUPPORTS_UPROBES
 272         def_bool y
 273
 274 config PPC_ADV_DEBUG_REGS
 275         bool
 276         depends on 40x || BOOKE
 277         default y
 278
 279 config PPC_ADV_DEBUG_IACS
 280         int
 281         depends on PPC_ADV_DEBUG_REGS
 282         default 4 if 44x
 283         default 2
 284
 285 config PPC_ADV_DEBUG_DACS
 286         int
 287         depends on PPC_ADV_DEBUG_REGS
 288         default 2
 289
 290 config PPC_ADV_DEBUG_DVCS
 291         int
 292         depends on PPC_ADV_DEBUG_REGS
 293         default 2 if 44x
 294         default 0
 295
 296 config PPC_ADV_DEBUG_DAC_RANGE
 297         bool
 298         depends on PPC_ADV_DEBUG_REGS && 44x
 299         default y
 300
 301 config PPC_EMULATE_SSTEP
 302         bool
 303         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 304
 305 config ZONE_DMA32
 306         bool
 307         default y if PPC64
 308
 309 config PGTABLE_LEVELS
 310         int
 311         default 2 if !PPC64
 312         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 313         default 4
 314
 315 source "init/Kconfig"
 316
 317 source "kernel/Kconfig.freezer"
 318
 319 source "arch/powerpc/sysdev/Kconfig"
 320 source "arch/powerpc/platforms/Kconfig"
 321
 322 menu "Kernel options"
 323
 324 config HIGHMEM
 325         bool "High memory support"
 326         depends on PPC32
 327
 328 source kernel/Kconfig.hz
 329 source kernel/Kconfig.preempt
 330 source "fs/Kconfig.binfmt"
 331
 332 config HUGETLB_PAGE_SIZE_VARIABLE
 333         bool
 334         depends on HUGETLB_PAGE
 335         default y
 336
 337 config MATH_EMULATION
 338         bool "Math emulation"
 339         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 340         ---help---
 341           Some PowerPC chips designed for embedded applications do not have
 342           a floating-point unit and therefore do not implement the
 343           floating-point instructions in the PowerPC instruction set.  If you
 344           say Y here, the kernel will include code to emulate a floating-point
 345           unit, which will allow programs that use floating-point
 346           instructions to run.
 347
 348           This is also useful to emulate missing (optional) instructions
 349           such as fsqrt on cores that do have an FPU but do not implement
 350           them (such as Freescale BookE).
 351
 352 choice
 353         prompt "Math emulation options"
 354         default MATH_EMULATION_FULL
 355         depends on MATH_EMULATION
 356
 357 config  MATH_EMULATION_FULL
 358         bool "Emulate all the floating point instructions"
 359         ---help---
 360           Select this option will enable the kernel to support to emulate
 361           all the floating point instructions. If your SoC doesn't have
 362           a FPU, you should select this.
 363
 364 config MATH_EMULATION_HW_UNIMPLEMENTED
 365         bool "Just emulate the FPU unimplemented instructions"
 366         ---help---
 367           Select this if you know there does have a hardware FPU on your
 368           SoC, but some floating point instructions are not implemented by that.
 369
 370 endchoice
 371
 372 config PPC_TRANSACTIONAL_MEM
 373        bool "Transactional Memory support for POWERPC"
 374        depends on PPC_BOOK3S_64
 375        depends on SMP
 376        select ALTIVEC
 377        select VSX
 378        default n
 379        ---help---
 380          Support user-mode Transactional Memory on POWERPC.
 381
 382 config DISABLE_MPROFILE_KERNEL
 383         bool "Disable use of mprofile-kernel for kernel tracing"
 384         depends on PPC64 && CPU_LITTLE_ENDIAN
 385         default y
 386         help
 387           Selecting this options disables use of the mprofile-kernel ABI for
 388           kernel tracing. That will cause options such as live patching
 389           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 390           be disabled also.
 391
 392           If you have a toolchain which supports mprofile-kernel, then you can
 393           enable this. Otherwise leave it disabled. If you're not sure, say
 394           "N".
 395
 396 config MPROFILE_KERNEL
 397         depends on PPC64 && CPU_LITTLE_ENDIAN
 398         def_bool !DISABLE_MPROFILE_KERNEL
 399
 400 config USE_THIN_ARCHIVES
 401         bool "Build the kernel using thin archives"
 402         default n
 403         select THIN_ARCHIVES
 404         help
 405           Build the kernel using thin archives.
 406           If you're unsure say N.
 407
 408 config IOMMU_HELPER
 409         def_bool PPC64
 410
 411 config SWIOTLB
 412         bool "SWIOTLB support"
 413         default n
 414         select IOMMU_HELPER
 415         ---help---
 416           Support for IO bounce buffering for systems without an IOMMU.
 417           This allows us to DMA to the full physical address space on
 418           platforms where the size of a physical address is larger
 419           than the bus address.  Not all platforms support this.
 420
 421 config HOTPLUG_CPU
 422         bool "Support for enabling/disabling CPUs"
 423         depends on SMP && (PPC_PSERIES || \
 424         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 425         ---help---
 426           Say Y here to be able to disable and re-enable individual
 427           CPUs at runtime on SMP machines.
 428
 429           Say N if you are unsure.
 430
 431 config ARCH_CPU_PROBE_RELEASE
 432         def_bool y
 433         depends on HOTPLUG_CPU
 434
 435 config ARCH_ENABLE_MEMORY_HOTPLUG
 436         def_bool y
 437
 438 config ARCH_HAS_WALK_MEMORY
 439         def_bool y
 440
 441 config ARCH_ENABLE_MEMORY_HOTREMOVE
 442         def_bool y
 443
 444 config PPC64_SUPPORTS_MEMORY_FAILURE
 445         bool "Add support for memory hwpoison"
 446         depends on PPC_BOOK3S_64
 447         default "y" if PPC_POWERNV
 448         select ARCH_SUPPORTS_MEMORY_FAILURE
 449
 450 config KEXEC
 451         bool "kexec system call"
 452         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 453         select KEXEC_CORE
 454         help
 455           kexec is a system call that implements the ability to shutdown your
 456           current kernel, and to start another kernel.  It is like a reboot
 457           but it is independent of the system firmware.   And like a reboot
 458           you can start any kernel with it, not just Linux.
 459
 460           The name comes from the similarity to the exec system call.
 461
 462           It is an ongoing process to be certain the hardware in a machine
 463           is properly shutdown, so do not be surprised if this code does not
 464           initially work for you.  As of this writing the exact hardware
 465           interface is strongly in flux, so no good recommendation can be
 466           made.
 467
 468 config KEXEC_FILE
 469         bool "kexec file based system call"
 470         select KEXEC_CORE
 471         select HAVE_IMA_KEXEC
 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         select MODULE_REL_CRCS if MODVERSIONS
 487         help
 488           This builds a kernel image that is capable of running at the
 489           location the kernel is loaded at. For ppc32, there is no any
 490           alignment restrictions, and this feature is a superset of
 491           DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 492           16k-aligned base address. The kernel is linked as a
 493           position-independent executable (PIE) and contains dynamic relocations
 494           which are processed early in the bootup process.
 495
 496           One use is for the kexec on panic case where the recovery kernel
 497           must live at a different physical address than the primary
 498           kernel.
 499
 500           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 501           it has been loaded at and the compile time physical addresses
 502           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 503           setting can still be useful to bootwrappers that need to know the
 504           load address of the kernel (eg. u-boot/mkimage).
 505
 506 config RELOCATABLE_TEST
 507         bool "Test relocatable kernel"
 508         depends on (PPC64 && RELOCATABLE)
 509         default n
 510         help
 511           This runs the relocatable kernel at the address it was initially
 512           loaded at, which tends to be non-zero and therefore test the
 513           relocation code.
 514
 515 config CRASH_DUMP
 516         bool "Build a kdump crash kernel"
 517         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 518         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 519         help
 520           Build a kernel suitable for use as a kdump capture kernel.
 521           The same kernel binary can be used as production kernel and dump
 522           capture kernel.
 523
 524 config FA_DUMP
 525         bool "Firmware-assisted dump"
 526         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC_CORE
 527         help
 528           A robust mechanism to get reliable kernel crash dump with
 529           assistance from firmware. This approach does not use kexec,
 530           instead firmware assists in booting the kdump kernel
 531           while preserving memory contents. Firmware-assisted dump
 532           is meant to be a kdump replacement offering robustness and
 533           speed not possible without system firmware assistance.
 534
 535           If unsure, say "N"
 536
 537 config IRQ_ALL_CPUS
 538         bool "Distribute interrupts on all CPUs by default"
 539         depends on SMP
 540         help
 541           This option gives the kernel permission to distribute IRQs across
 542           multiple CPUs.  Saying N here will route all IRQs to the first
 543           CPU.  Generally saying Y is safe, although some problems have been
 544           reported with SMP Power Macintoshes with this option enabled.
 545
 546 config NUMA
 547         bool "NUMA support"
 548         depends on PPC64
 549         default y if SMP && PPC_PSERIES
 550
 551 config NODES_SHIFT
 552         int
 553         default "8" if PPC64
 554         default "4"
 555         depends on NEED_MULTIPLE_NODES
 556
 557 config USE_PERCPU_NUMA_NODE_ID
 558         def_bool y
 559         depends on NUMA
 560
 561 config HAVE_MEMORYLESS_NODES
 562         def_bool y
 563         depends on NUMA
 564
 565 config ARCH_SELECT_MEMORY_MODEL
 566         def_bool y
 567         depends on PPC64
 568
 569 config ARCH_FLATMEM_ENABLE
 570         def_bool y
 571         depends on (PPC64 && !NUMA) || PPC32
 572
 573 config ARCH_SPARSEMEM_ENABLE
 574         def_bool y
 575         depends on PPC64
 576         select SPARSEMEM_VMEMMAP_ENABLE
 577
 578 config ARCH_SPARSEMEM_DEFAULT
 579         def_bool y
 580         depends on (SMP && PPC_PSERIES) || PPC_PS3
 581
 582 config SYS_SUPPORTS_HUGETLBFS
 583         bool
 584
 585 config ILLEGAL_POINTER_VALUE
 586         hex
 587         # This is roughly half way between the top of user space and the bottom
 588         # of kernel space, which seems about as good as we can get.
 589         default 0x5deadbeef0000000 if PPC64
 590         default 0
 591
 592 source "mm/Kconfig"
 593
 594 config ARCH_MEMORY_PROBE
 595         def_bool y
 596         depends on MEMORY_HOTPLUG
 597
 598 # Some NUMA nodes have memory ranges that span
 599 # other nodes.  Even though a pfn is valid and
 600 # between a node's start and end pfns, it may not
 601 # reside on that node.  See memmap_init_zone()
 602 # for details.
 603 config NODES_SPAN_OTHER_NODES
 604         def_bool y
 605         depends on NEED_MULTIPLE_NODES
 606
 607 config STDBINUTILS
 608         bool "Using standard binutils settings"
 609         depends on 44x
 610         default y
 611         help
 612           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 613           Note, that kernel will be able to run only those applications,
 614           which had been compiled using binutils later than 2.17.50.0.3 with
 615           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 616           the older binutils, you can patch them with a trivial patch, which
 617           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 618
 619 choice
 620         prompt "Page size"
 621         default PPC_4K_PAGES
 622         help
 623           Select the kernel logical page size. Increasing the page size
 624           will reduce software overhead at each page boundary, allow
 625           hardware prefetch mechanisms to be more effective, and allow
 626           larger dma transfers increasing IO efficiency and reducing
 627           overhead. However the utilization of memory will increase.
 628           For example, each cached file will using a multiple of the
 629           page size to hold its contents and the difference between the
 630           end of file and the end of page is wasted.
 631
 632           Some dedicated systems, such as software raid serving with
 633           accelerated calculations, have shown significant increases.
 634
 635           If you configure a 64 bit kernel for 64k pages but the
 636           processor does not support them, then the kernel will simulate
 637           them with 4k pages, loading them on demand, but with the
 638           reduced software overhead and larger internal fragmentation.
 639           For the 32 bit kernel, a large page option will not be offered
 640           unless it is supported by the configured processor.
 641
 642           If unsure, choose 4K_PAGES.
 643
 644 config PPC_4K_PAGES
 645         bool "4k page size"
 646         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 647
 648 config PPC_16K_PAGES
 649         bool "16k page size"
 650         depends on 44x || PPC_8xx
 651
 652 config PPC_64K_PAGES
 653         bool "64k page size"
 654         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 655         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 656
 657 config PPC_256K_PAGES
 658         bool "256k page size"
 659         depends on 44x && !STDBINUTILS
 660         help
 661           Make the page size 256k.
 662
 663           As the ELF standard only requires alignment to support page
 664           sizes up to 64k, you will need to compile all of your user
 665           space applications with a non-standard binutils settings
 666           (see the STDBINUTILS description for details).
 667
 668           Say N unless you know what you are doing.
 669
 670 endchoice
 671
 672 config FORCE_MAX_ZONEORDER
 673         int "Maximum zone order"
 674         range 8 9 if PPC64 && PPC_64K_PAGES
 675         default "9" if PPC64 && PPC_64K_PAGES
 676         range 13 13 if PPC64 && !PPC_64K_PAGES
 677         default "13" if PPC64 && !PPC_64K_PAGES
 678         range 9 64 if PPC32 && PPC_16K_PAGES
 679         default "9" if PPC32 && PPC_16K_PAGES
 680         range 7 64 if PPC32 && PPC_64K_PAGES
 681         default "7" if PPC32 && PPC_64K_PAGES
 682         range 5 64 if PPC32 && PPC_256K_PAGES
 683         default "5" if PPC32 && PPC_256K_PAGES
 684         range 11 64
 685         default "11"
 686         help
 687           The kernel memory allocator divides physically contiguous memory
 688           blocks into "zones", where each zone is a power of two number of
 689           pages.  This option selects the largest power of two that the kernel
 690           keeps in the memory allocator.  If you need to allocate very large
 691           blocks of physically contiguous memory, then you may need to
 692           increase this value.
 693
 694           This config option is actually maximum order plus one. For example,
 695           a value of 11 means that the largest free memory block is 2^10 pages.
 696
 697           The page size is not necessarily 4KB.  For example, on 64-bit
 698           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 699           this in mind when choosing a value for this option.
 700
 701 config PPC_SUBPAGE_PROT
 702         bool "Support setting protections for 4k subpages"
 703         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 704         help
 705           This option adds support for a system call to allow user programs
 706           to set access permissions (read/write, readonly, or no access)
 707           on the 4k subpages of each 64k page.
 708
 709 config PPC_COPRO_BASE
 710         bool
 711         default n
 712
 713 config SCHED_SMT
 714         bool "SMT (Hyperthreading) scheduler support"
 715         depends on PPC64 && SMP
 716         help
 717           SMT scheduler support improves the CPU scheduler's decision making
 718           when dealing with POWER5 cpus at a cost of slightly increased
 719           overhead in some places. If unsure say N here.
 720
 721 config PPC_DENORMALISATION
 722         bool "PowerPC denormalisation exception handling"
 723         depends on PPC_BOOK3S_64
 724         default "y" if PPC_POWERNV
 725         ---help---
 726           Add support for handling denormalisation of single precision
 727           values.  Useful for bare metal only.  If unsure say Y here.
 728
 729 config CMDLINE_BOOL
 730         bool "Default bootloader kernel arguments"
 731
 732 config CMDLINE
 733         string "Initial kernel command string"
 734         depends on CMDLINE_BOOL
 735         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 736         help
 737           On some platforms, there is currently no way for the boot loader to
 738           pass arguments to the kernel. For these platforms, you can supply
 739           some command-line options at build time by entering them here.  In
 740           most cases you will need to specify the root device here.
 741
 742 config CMDLINE_FORCE
 743         bool "Always use the default kernel command string"
 744         depends on CMDLINE_BOOL
 745         help
 746           Always use the default kernel command string, even if the boot
 747           loader passes other arguments to the kernel.
 748           This is useful if you cannot or don't want to change the
 749           command-line options your boot loader passes to the kernel.
 750
 751 config EXTRA_TARGETS
 752         string "Additional default image types"
 753         help
 754           List additional targets to be built by the bootwrapper here (separated
 755           by spaces).  This is useful for targets that depend of device tree
 756           files in the .dts directory.
 757
 758           Targets in this list will be build as part of the default build
 759           target, or when the user does a 'make zImage' or a
 760           'make zImage.initrd'.
 761
 762           If unsure, leave blank
 763
 764 config ARCH_WANTS_FREEZER_CONTROL
 765         def_bool y
 766         depends on ADB_PMU
 767
 768 source kernel/power/Kconfig
 769
 770 config SECCOMP
 771         bool "Enable seccomp to safely compute untrusted bytecode"
 772         depends on PROC_FS
 773         default y
 774         help
 775           This kernel feature is useful for number crunching applications
 776           that may need to compute untrusted bytecode during their
 777           execution. By using pipes or other transports made available to
 778           the process as file descriptors supporting the read/write
 779           syscalls, it's possible to isolate those applications in
 780           their own address space using seccomp. Once seccomp is
 781           enabled via /proc/<pid>/seccomp, it cannot be disabled
 782           and the task is only allowed to execute a few safe syscalls
 783           defined by each seccomp mode.
 784
 785           If unsure, say Y. Only embedded should say N here.
 786
 787 endmenu
 788
 789 config ISA_DMA_API
 790         bool
 791         default PCI
 792
 793 menu "Bus options"
 794
 795 config ISA
 796         bool "Support for ISA-bus hardware"
 797         depends on PPC_CHRP
 798         select PPC_I8259
 799         help
 800           Find out whether you have ISA slots on your motherboard.  ISA is the
 801           name of a bus system, i.e. the way the CPU talks to the other stuff
 802           inside your box.  If you have an Apple machine, say N here; if you
 803           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 804           embedded board, consult your board documentation.
 805
 806 config ZONE_DMA
 807         bool
 808         default y
 809
 810 config NEED_DMA_MAP_STATE
 811         def_bool (PPC64 || NOT_COHERENT_CACHE)
 812
 813 config NEED_SG_DMA_LENGTH
 814         def_bool y
 815
 816 config GENERIC_ISA_DMA
 817         bool
 818         depends on ISA_DMA_API
 819         default y
 820
 821 config PPC_INDIRECT_PCI
 822         bool
 823         depends on PCI
 824         default y if 40x || 44x
 825         default n
 826
 827 config EISA
 828         bool
 829
 830 config SBUS
 831         bool
 832
 833 config FSL_SOC
 834         bool
 835
 836 config FSL_PCI
 837         bool
 838         select PPC_INDIRECT_PCI
 839         select PCI_QUIRKS
 840
 841 config FSL_PMC
 842         bool
 843         default y
 844         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 845         help
 846           Freescale MPC85xx/MPC86xx power management controller support
 847           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 848
 849 config PPC4xx_CPM
 850         bool
 851         default y
 852         depends on SUSPEND && (44x || 40x)
 853         help
 854           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 855           It also enables support for two different idle states (idle-wait
 856           and idle-doze).
 857
 858 config 4xx_SOC
 859         bool
 860
 861 config FSL_LBC
 862         bool "Freescale Local Bus support"
 863         help
 864           Enables reporting of errors from the Freescale local bus
 865           controller.  Also contains some common code used by
 866           drivers for specific local bus peripherals.
 867
 868 config FSL_GTM
 869         bool
 870         depends on PPC_83xx || QUICC_ENGINE || CPM2
 871         help
 872           Freescale General-purpose Timers support
 873
 874 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 875 config MCA
 876         bool
 877
 878 # Platforms that what PCI turned unconditionally just do select PCI
 879 # in their config node.  Platforms that want to choose at config
 880 # time should select PPC_PCI_CHOICE
 881 config PPC_PCI_CHOICE
 882         bool
 883
 884 config PCI
 885         bool "PCI support" if PPC_PCI_CHOICE
 886         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 887                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 888         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 889         select GENERIC_PCI_IOMAP
 890         help
 891           Find out whether your system includes a PCI bus. PCI is the name of
 892           a bus system, i.e. the way the CPU talks to the other stuff inside
 893           your box.  If you say Y here, the kernel will include drivers and
 894           infrastructure code to support PCI bus devices.
 895
 896 config PCI_DOMAINS
 897         def_bool PCI
 898
 899 config PCI_SYSCALL
 900         def_bool PCI
 901
 902 config PCI_QSPAN
 903         bool "QSpan PCI"
 904         depends on !4xx && !CPM2 && 8xx
 905         select PPC_I8259
 906         help
 907           Say Y here if you have a system based on a Motorola 8xx-series
 908           embedded processor with a QSPAN PCI interface, otherwise say N.
 909
 910 config PCI_8260
 911         bool
 912         depends on PCI && 8260
 913         select PPC_INDIRECT_PCI
 914         default y
 915
 916 source "drivers/pci/Kconfig"
 917
 918 source "drivers/pcmcia/Kconfig"
 919
 920 config HAS_RAPIDIO
 921         bool
 922         default n
 923
 924 config RAPIDIO
 925         tristate "RapidIO support"
 926         depends on HAS_RAPIDIO || PCI
 927         help
 928           If you say Y here, the kernel will include drivers and
 929           infrastructure code to support RapidIO interconnect devices.
 930
 931 config FSL_RIO
 932         bool "Freescale Embedded SRIO Controller support"
 933         depends on RAPIDIO = y && HAS_RAPIDIO
 934         default "n"
 935         ---help---
 936           Include support for RapidIO controller on Freescale embedded
 937           processors (MPC8548, MPC8641, etc).
 938
 939 source "drivers/rapidio/Kconfig"
 940
 941 endmenu
 942
 943 config NONSTATIC_KERNEL
 944         bool
 945         default n
 946
 947 menu "Advanced setup"
 948         depends on PPC32
 949
 950 config ADVANCED_OPTIONS
 951         bool "Prompt for advanced kernel configuration options"
 952         help
 953           This option will enable prompting for a variety of advanced kernel
 954           configuration options.  These options can cause the kernel to not
 955           work if they are set incorrectly, but can be used to optimize certain
 956           aspects of kernel memory management.
 957
 958           Unless you know what you are doing, say N here.
 959
 960 comment "Default settings for advanced configuration options are used"
 961         depends on !ADVANCED_OPTIONS
 962
 963 config LOWMEM_SIZE_BOOL
 964         bool "Set maximum low memory"
 965         depends on ADVANCED_OPTIONS
 966         help
 967           This option allows you to set the maximum amount of memory which
 968           will be used as "low memory", that is, memory which the kernel can
 969           access directly, without having to set up a kernel virtual mapping.
 970           This can be useful in optimizing the layout of kernel virtual
 971           memory.
 972
 973           Say N here unless you know what you are doing.
 974
 975 config LOWMEM_SIZE
 976         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 977         default "0x30000000"
 978
 979 config LOWMEM_CAM_NUM_BOOL
 980         bool "Set number of CAMs to use to map low memory"
 981         depends on ADVANCED_OPTIONS && FSL_BOOKE
 982         help
 983           This option allows you to set the maximum number of CAM slots that
 984           will be used to map low memory.  There are a limited number of slots
 985           available and even more limited number that will fit in the L1 MMU.
 986           However, using more entries will allow mapping more low memory.  This
 987           can be useful in optimizing the layout of kernel virtual memory.
 988
 989           Say N here unless you know what you are doing.
 990
 991 config LOWMEM_CAM_NUM
 992         depends on FSL_BOOKE
 993         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 994         default 3
 995
 996 config DYNAMIC_MEMSTART
 997         bool "Enable page aligned dynamic load address for kernel"
 998         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 999         select NONSTATIC_KERNEL
1000         help
1001           This option enables the kernel to be loaded at any page aligned
1002           physical address. The kernel creates a mapping from KERNELBASE to
1003           the address where the kernel is loaded. The page size here implies
1004           the TLB page size of the mapping for kernel on the particular platform.
1005           Please refer to the init code for finding the TLB page size.
1006
1007           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1008           kernel image, where the only restriction is the page aligned kernel
1009           load address. When this option is enabled, the compile time physical
1010           address CONFIG_PHYSICAL_START is ignored.
1011
1012           This option is overridden by CONFIG_RELOCATABLE
1013
1014 config PAGE_OFFSET_BOOL
1015         bool "Set custom page offset address"
1016         depends on ADVANCED_OPTIONS
1017         help
1018           This option allows you to set the kernel virtual address at which
1019           the kernel will map low memory.  This can be useful in optimizing
1020           the virtual memory layout of the system.
1021
1022           Say N here unless you know what you are doing.
1023
1024 config PAGE_OFFSET
1025         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1026         default "0xc0000000"
1027
1028 config KERNEL_START_BOOL
1029         bool "Set custom kernel base address"
1030         depends on ADVANCED_OPTIONS
1031         help
1032           This option allows you to set the kernel virtual address at which
1033           the kernel will be loaded.  Normally this should match PAGE_OFFSET
1034           however there are times (like kdump) that one might not want them
1035           to be the same.
1036
1037           Say N here unless you know what you are doing.
1038
1039 config KERNEL_START
1040         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1041         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1042         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1043         default "0xc0000000"
1044
1045 config PHYSICAL_START_BOOL
1046         bool "Set physical address where the kernel is loaded"
1047         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1048         help
1049           This gives the physical address where the kernel is loaded.
1050
1051           Say N here unless you know what you are doing.
1052
1053 config PHYSICAL_START
1054         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1055         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1056         default "0x00000000"
1057
1058 config PHYSICAL_ALIGN
1059         hex
1060         default "0x04000000" if FSL_BOOKE
1061         help
1062           This value puts the alignment restrictions on physical address
1063           where kernel is loaded and run from. Kernel is compiled for an
1064           address which meets above alignment restriction.
1065
1066 config TASK_SIZE_BOOL
1067         bool "Set custom user task size"
1068         depends on ADVANCED_OPTIONS
1069         help
1070           This option allows you to set the amount of virtual address space
1071           allocated to user tasks.  This can be useful in optimizing the
1072           virtual memory layout of the system.
1073
1074           Say N here unless you know what you are doing.
1075
1076 config TASK_SIZE
1077         hex "Size of user task space" if TASK_SIZE_BOOL
1078         default "0x80000000" if PPC_8xx
1079         default "0xc0000000"
1080
1081 config CONSISTENT_SIZE_BOOL
1082         bool "Set custom consistent memory pool size"
1083         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1084         help
1085           This option allows you to set the size of the
1086           consistent memory pool.  This pool of virtual memory
1087           is used to make consistent memory allocations.
1088
1089 config CONSISTENT_SIZE
1090         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1091         default "0x00200000" if NOT_COHERENT_CACHE
1092
1093 config PIN_TLB
1094         bool "Pinned Kernel TLBs (860 ONLY)"
1095         depends on ADVANCED_OPTIONS && 8xx
1096
1097 config PIN_TLB_IMMR
1098         bool "Pinned TLB for IMMR"
1099         depends on PIN_TLB
1100         default y
1101 endmenu
1102
1103 if PPC64
1104 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1105 config PAGE_OFFSET
1106         hex
1107         default "0xc000000000000000"
1108 config KERNEL_START
1109         hex
1110         default "0xc000000000000000"
1111 config PHYSICAL_START
1112         hex
1113         default "0x00000000"
1114 endif
1115
1116 config  ARCH_RANDOM
1117         def_bool n
1118
1119 source "net/Kconfig"
1120
1121 source "drivers/Kconfig"
1122
1123 source "fs/Kconfig"
1124
1125 source "lib/Kconfig"
1126
1127 source "arch/powerpc/Kconfig.debug"
1128
1129 source "security/Kconfig"
1130
1131 config KEYS_COMPAT
1132         bool
1133         depends on COMPAT && KEYS
1134         default y
1135
1136 source "crypto/Kconfig"
1137
1138 config PPC_LIB_RHEAP
1139         bool
1140
1141 source "arch/powerpc/kvm/Kconfig"
1142
1143 source "kernel/livepatch/Kconfig"