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         #
  84         # Please keep this list sorted alphabetically.
  85         #
  86         select ARCH_HAS_DEVMEM_IS_ALLOWED
  87         select ARCH_HAS_DMA_SET_COHERENT_MASK
  88         select ARCH_HAS_ELF_RANDOMIZE
  89         select ARCH_HAS_GCOV_PROFILE_ALL
  90         select ARCH_HAS_SCALED_CPUTIME          if VIRT_CPU_ACCOUNTING_NATIVE
  91         select ARCH_HAS_SG_CHAIN
  92         select ARCH_HAS_TICK_BROADCAST          if GENERIC_CLOCKEVENTS_BROADCAST
  93         select ARCH_HAS_UBSAN_SANITIZE_ALL
  94         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  95         select ARCH_MIGHT_HAVE_PC_PARPORT
  96         select ARCH_MIGHT_HAVE_PC_SERIO
  97         select ARCH_SUPPORTS_ATOMIC_RMW
  98         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
  99         select ARCH_USE_BUILTIN_BSWAP
 100         select ARCH_USE_CMPXCHG_LOCKREF         if PPC64
 101         select ARCH_WANT_IPC_PARSE_VERSION
 102         select BINFMT_ELF
 103         select BUILDTIME_EXTABLE_SORT
 104         select CLONE_BACKWARDS
 105         select DCACHE_WORD_ACCESS               if PPC64 && CPU_LITTLE_ENDIAN
 106         select EDAC_ATOMIC_SCRUB
 107         select EDAC_SUPPORT
 108         select GENERIC_ATOMIC64                 if PPC32
 109         select GENERIC_CLOCKEVENTS
 110         select GENERIC_CLOCKEVENTS_BROADCAST    if SMP
 111         select GENERIC_CMOS_UPDATE
 112         select GENERIC_CPU_AUTOPROBE
 113         select GENERIC_IRQ_SHOW
 114         select GENERIC_IRQ_SHOW_LEVEL
 115         select GENERIC_SMP_IDLE_THREAD
 116         select GENERIC_STRNCPY_FROM_USER
 117         select GENERIC_STRNLEN_USER
 118         select GENERIC_TIME_VSYSCALL_OLD
 119         select HAVE_ARCH_AUDITSYSCALL
 120         select HAVE_ARCH_HARDENED_USERCOPY
 121         select HAVE_ARCH_JUMP_LABEL
 122         select HAVE_ARCH_KGDB
 123         select HAVE_ARCH_SECCOMP_FILTER
 124         select HAVE_ARCH_TRACEHOOK
 125         select HAVE_CBPF_JIT                    if !PPC64
 126         select HAVE_CONTEXT_TRACKING            if PPC64
 127         select HAVE_DEBUG_KMEMLEAK
 128         select HAVE_DEBUG_STACKOVERFLOW
 129         select HAVE_DMA_API_DEBUG
 130         select HAVE_DYNAMIC_FTRACE
 131         select HAVE_DYNAMIC_FTRACE_WITH_REGS    if MPROFILE_KERNEL
 132         select HAVE_EBPF_JIT                    if PPC64
 133         select HAVE_EFFICIENT_UNALIGNED_ACCESS  if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
 134         select HAVE_FTRACE_MCOUNT_RECORD
 135         select HAVE_FUNCTION_GRAPH_TRACER
 136         select HAVE_FUNCTION_TRACER
 137         select HAVE_GCC_PLUGINS
 138         select HAVE_GENERIC_RCU_GUP
 139         select HAVE_HW_BREAKPOINT               if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
 140         select HAVE_IDE
 141         select HAVE_IOREMAP_PROT
 142         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 143         select HAVE_KERNEL_GZIP
 144         select HAVE_KPROBES
 145         select HAVE_KRETPROBES
 146         select HAVE_LIVEPATCH                   if HAVE_DYNAMIC_FTRACE_WITH_REGS
 147         select HAVE_MEMBLOCK
 148         select HAVE_MEMBLOCK_NODE_MAP
 149         select HAVE_MOD_ARCH_SPECIFIC
 150         select HAVE_NMI                         if PERF_EVENTS
 151         select HAVE_OPROFILE
 152         select HAVE_OPTPROBES                   if PPC64
 153         select HAVE_PERF_EVENTS
 154         select HAVE_PERF_EVENTS_NMI             if PPC64
 155         select HAVE_PERF_REGS
 156         select HAVE_PERF_USER_STACK_DUMP
 157         select HAVE_RCU_TABLE_FREE              if SMP
 158         select HAVE_REGS_AND_STACK_ACCESS_API
 159         select HAVE_SYSCALL_TRACEPOINTS
 160         select HAVE_VIRT_CPU_ACCOUNTING
 161         select IRQ_DOMAIN
 162         select IRQ_FORCED_THREADING
 163         select MODULES_USE_ELF_RELA
 164         select NO_BOOTMEM
 165         select OF
 166         select OF_EARLY_FLATTREE
 167         select OF_RESERVED_MEM
 168         select OLD_SIGACTION                    if PPC32
 169         select OLD_SIGSUSPEND
 170         select SPARSE_IRQ
 171         select SYSCTL_EXCEPTION_TRACE
 172         select VIRT_TO_BUS                      if !PPC64
 173         #
 174         # Please keep this list sorted alphabetically.
 175         #
 176
 177 config GENERIC_CSUM
 178         def_bool n
 179
 180 config EARLY_PRINTK
 181         bool
 182         default y
 183
 184 config PANIC_TIMEOUT
 185         int
 186         default 180
 187
 188 config COMPAT
 189         bool
 190         default y if PPC64
 191         select COMPAT_BINFMT_ELF
 192         select ARCH_WANT_OLD_COMPAT_IPC
 193         select COMPAT_OLD_SIGACTION
 194
 195 config SYSVIPC_COMPAT
 196         bool
 197         depends on COMPAT && SYSVIPC
 198         default y
 199
 200 # All PPC32s use generic nvram driver through ppc_md
 201 config GENERIC_NVRAM
 202         bool
 203         default y if PPC32
 204
 205 config SCHED_OMIT_FRAME_POINTER
 206         bool
 207         default y
 208
 209 config ARCH_MAY_HAVE_PC_FDC
 210         bool
 211         default PCI
 212
 213 config PPC_UDBG_16550
 214         bool
 215         default n
 216
 217 config GENERIC_TBSYNC
 218         bool
 219         default y if PPC32 && SMP
 220         default n
 221
 222 config AUDIT_ARCH
 223         bool
 224         default y
 225
 226 config GENERIC_BUG
 227         bool
 228         default y
 229         depends on BUG
 230
 231 config SYS_SUPPORTS_APM_EMULATION
 232         default y if PMAC_APM_EMU
 233         bool
 234
 235 config EPAPR_BOOT
 236         bool
 237         help
 238           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 239         default n
 240
 241 config DEFAULT_UIMAGE
 242         bool
 243         help
 244           Used to allow a board to specify it wants a uImage built by default
 245         default n
 246
 247 config ARCH_HIBERNATION_POSSIBLE
 248         bool
 249         default y
 250
 251 config ARCH_SUSPEND_POSSIBLE
 252         def_bool y
 253         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 254                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 255                    || 44x || 40x
 256
 257 config PPC_DCR_NATIVE
 258         bool
 259         default n
 260
 261 config PPC_DCR_MMIO
 262         bool
 263         default n
 264
 265 config PPC_DCR
 266         bool
 267         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 268         default y
 269
 270 config PPC_OF_PLATFORM_PCI
 271         bool
 272         depends on PCI
 273         depends on PPC64 # not supported on 32 bits yet
 274         default n
 275
 276 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 277         depends on PPC32 || PPC_STD_MMU_64
 278         def_bool y
 279
 280 config ARCH_SUPPORTS_UPROBES
 281         def_bool y
 282
 283 config PPC_ADV_DEBUG_REGS
 284         bool
 285         depends on 40x || BOOKE
 286         default y
 287
 288 config PPC_ADV_DEBUG_IACS
 289         int
 290         depends on PPC_ADV_DEBUG_REGS
 291         default 4 if 44x
 292         default 2
 293
 294 config PPC_ADV_DEBUG_DACS
 295         int
 296         depends on PPC_ADV_DEBUG_REGS
 297         default 2
 298
 299 config PPC_ADV_DEBUG_DVCS
 300         int
 301         depends on PPC_ADV_DEBUG_REGS
 302         default 2 if 44x
 303         default 0
 304
 305 config PPC_ADV_DEBUG_DAC_RANGE
 306         bool
 307         depends on PPC_ADV_DEBUG_REGS && 44x
 308         default y
 309
 310 config PPC_EMULATE_SSTEP
 311         bool
 312         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 313
 314 config ZONE_DMA32
 315         bool
 316         default y if PPC64
 317
 318 config PGTABLE_LEVELS
 319         int
 320         default 2 if !PPC64
 321         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 322         default 4
 323
 324 source "init/Kconfig"
 325
 326 source "kernel/Kconfig.freezer"
 327
 328 source "arch/powerpc/sysdev/Kconfig"
 329 source "arch/powerpc/platforms/Kconfig"
 330
 331 menu "Kernel options"
 332
 333 config HIGHMEM
 334         bool "High memory support"
 335         depends on PPC32
 336
 337 source kernel/Kconfig.hz
 338 source kernel/Kconfig.preempt
 339 source "fs/Kconfig.binfmt"
 340
 341 config HUGETLB_PAGE_SIZE_VARIABLE
 342         bool
 343         depends on HUGETLB_PAGE
 344         default y
 345
 346 config MATH_EMULATION
 347         bool "Math emulation"
 348         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 349         ---help---
 350           Some PowerPC chips designed for embedded applications do not have
 351           a floating-point unit and therefore do not implement the
 352           floating-point instructions in the PowerPC instruction set.  If you
 353           say Y here, the kernel will include code to emulate a floating-point
 354           unit, which will allow programs that use floating-point
 355           instructions to run.
 356
 357           This is also useful to emulate missing (optional) instructions
 358           such as fsqrt on cores that do have an FPU but do not implement
 359           them (such as Freescale BookE).
 360
 361 choice
 362         prompt "Math emulation options"
 363         default MATH_EMULATION_FULL
 364         depends on MATH_EMULATION
 365
 366 config  MATH_EMULATION_FULL
 367         bool "Emulate all the floating point instructions"
 368         ---help---
 369           Select this option will enable the kernel to support to emulate
 370           all the floating point instructions. If your SoC doesn't have
 371           a FPU, you should select this.
 372
 373 config MATH_EMULATION_HW_UNIMPLEMENTED
 374         bool "Just emulate the FPU unimplemented instructions"
 375         ---help---
 376           Select this if you know there does have a hardware FPU on your
 377           SoC, but some floating point instructions are not implemented by that.
 378
 379 endchoice
 380
 381 config PPC_TRANSACTIONAL_MEM
 382        bool "Transactional Memory support for POWERPC"
 383        depends on PPC_BOOK3S_64
 384        depends on SMP
 385        select ALTIVEC
 386        select VSX
 387        default n
 388        ---help---
 389          Support user-mode Transactional Memory on POWERPC.
 390
 391 config DISABLE_MPROFILE_KERNEL
 392         bool "Disable use of mprofile-kernel for kernel tracing"
 393         depends on PPC64 && CPU_LITTLE_ENDIAN
 394         default y
 395         help
 396           Selecting this options disables use of the mprofile-kernel ABI for
 397           kernel tracing. That will cause options such as live patching
 398           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 399           be disabled also.
 400
 401           If you have a toolchain which supports mprofile-kernel, then you can
 402           disable this. Otherwise leave it enabled. If you're not sure, say
 403           "Y".
 404
 405 config MPROFILE_KERNEL
 406         depends on PPC64 && CPU_LITTLE_ENDIAN
 407         def_bool !DISABLE_MPROFILE_KERNEL
 408
 409 config USE_THIN_ARCHIVES
 410         bool "Build the kernel using thin archives"
 411         default n
 412         select THIN_ARCHIVES
 413         help
 414           Build the kernel using thin archives.
 415           If you're unsure say N.
 416
 417 config IOMMU_HELPER
 418         def_bool PPC64
 419
 420 config SWIOTLB
 421         bool "SWIOTLB support"
 422         default n
 423         select IOMMU_HELPER
 424         ---help---
 425           Support for IO bounce buffering for systems without an IOMMU.
 426           This allows us to DMA to the full physical address space on
 427           platforms where the size of a physical address is larger
 428           than the bus address.  Not all platforms support this.
 429
 430 config HOTPLUG_CPU
 431         bool "Support for enabling/disabling CPUs"
 432         depends on SMP && (PPC_PSERIES || \
 433         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 434         ---help---
 435           Say Y here to be able to disable and re-enable individual
 436           CPUs at runtime on SMP machines.
 437
 438           Say N if you are unsure.
 439
 440 config ARCH_CPU_PROBE_RELEASE
 441         def_bool y
 442         depends on HOTPLUG_CPU
 443
 444 config ARCH_ENABLE_MEMORY_HOTPLUG
 445         def_bool y
 446
 447 config ARCH_HAS_WALK_MEMORY
 448         def_bool y
 449
 450 config ARCH_ENABLE_MEMORY_HOTREMOVE
 451         def_bool y
 452
 453 config PPC64_SUPPORTS_MEMORY_FAILURE
 454         bool "Add support for memory hwpoison"
 455         depends on PPC_BOOK3S_64
 456         default "y" if PPC_POWERNV
 457         select ARCH_SUPPORTS_MEMORY_FAILURE
 458
 459 config KEXEC
 460         bool "kexec system call"
 461         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 462         select KEXEC_CORE
 463         help
 464           kexec is a system call that implements the ability to shutdown your
 465           current kernel, and to start another kernel.  It is like a reboot
 466           but it is independent of the system firmware.   And like a reboot
 467           you can start any kernel with it, not just Linux.
 468
 469           The name comes from the similarity to the exec system call.
 470
 471           It is an ongoing process to be certain the hardware in a machine
 472           is properly shutdown, so do not be surprised if this code does not
 473           initially work for you.  As of this writing the exact hardware
 474           interface is strongly in flux, so no good recommendation can be
 475           made.
 476
 477 config KEXEC_FILE
 478         bool "kexec file based system call"
 479         select KEXEC_CORE
 480         select HAVE_IMA_KEXEC
 481         select BUILD_BIN2C
 482         depends on PPC64
 483         depends on CRYPTO=y
 484         depends on CRYPTO_SHA256=y
 485         help
 486           This is a new version of the kexec system call. This call is
 487           file based and takes in file descriptors as system call arguments
 488           for kernel and initramfs as opposed to a list of segments as is the
 489           case for the older kexec call.
 490
 491 config RELOCATABLE
 492         bool "Build a relocatable kernel"
 493         depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
 494         select NONSTATIC_KERNEL
 495         select MODULE_REL_CRCS if MODVERSIONS
 496         help
 497           This builds a kernel image that is capable of running at the
 498           location the kernel is loaded at. For ppc32, there is no any
 499           alignment restrictions, and this feature is a superset of
 500           DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 501           16k-aligned base address. The kernel is linked as a
 502           position-independent executable (PIE) and contains dynamic relocations
 503           which are processed early in the bootup process.
 504
 505           One use is for the kexec on panic case where the recovery kernel
 506           must live at a different physical address than the primary
 507           kernel.
 508
 509           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 510           it has been loaded at and the compile time physical addresses
 511           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 512           setting can still be useful to bootwrappers that need to know the
 513           load address of the kernel (eg. u-boot/mkimage).
 514
 515 config RELOCATABLE_TEST
 516         bool "Test relocatable kernel"
 517         depends on (PPC64 && RELOCATABLE)
 518         default n
 519         help
 520           This runs the relocatable kernel at the address it was initially
 521           loaded at, which tends to be non-zero and therefore test the
 522           relocation code.
 523
 524 config CRASH_DUMP
 525         bool "Build a kdump crash kernel"
 526         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 527         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 528         help
 529           Build a kernel suitable for use as a kdump capture kernel.
 530           The same kernel binary can be used as production kernel and dump
 531           capture kernel.
 532
 533 config FA_DUMP
 534         bool "Firmware-assisted dump"
 535         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC_CORE
 536         help
 537           A robust mechanism to get reliable kernel crash dump with
 538           assistance from firmware. This approach does not use kexec,
 539           instead firmware assists in booting the kdump kernel
 540           while preserving memory contents. Firmware-assisted dump
 541           is meant to be a kdump replacement offering robustness and
 542           speed not possible without system firmware assistance.
 543
 544           If unsure, say "N"
 545
 546 config IRQ_ALL_CPUS
 547         bool "Distribute interrupts on all CPUs by default"
 548         depends on SMP
 549         help
 550           This option gives the kernel permission to distribute IRQs across
 551           multiple CPUs.  Saying N here will route all IRQs to the first
 552           CPU.  Generally saying Y is safe, although some problems have been
 553           reported with SMP Power Macintoshes with this option enabled.
 554
 555 config NUMA
 556         bool "NUMA support"
 557         depends on PPC64
 558         default y if SMP && PPC_PSERIES
 559
 560 config NODES_SHIFT
 561         int
 562         default "8" if PPC64
 563         default "4"
 564         depends on NEED_MULTIPLE_NODES
 565
 566 config USE_PERCPU_NUMA_NODE_ID
 567         def_bool y
 568         depends on NUMA
 569
 570 config HAVE_MEMORYLESS_NODES
 571         def_bool y
 572         depends on NUMA
 573
 574 config ARCH_SELECT_MEMORY_MODEL
 575         def_bool y
 576         depends on PPC64
 577
 578 config ARCH_FLATMEM_ENABLE
 579         def_bool y
 580         depends on (PPC64 && !NUMA) || PPC32
 581
 582 config ARCH_SPARSEMEM_ENABLE
 583         def_bool y
 584         depends on PPC64
 585         select SPARSEMEM_VMEMMAP_ENABLE
 586
 587 config ARCH_SPARSEMEM_DEFAULT
 588         def_bool y
 589         depends on (SMP && PPC_PSERIES) || PPC_PS3
 590
 591 config SYS_SUPPORTS_HUGETLBFS
 592         bool
 593
 594 config ILLEGAL_POINTER_VALUE
 595         hex
 596         # This is roughly half way between the top of user space and the bottom
 597         # of kernel space, which seems about as good as we can get.
 598         default 0x5deadbeef0000000 if PPC64
 599         default 0
 600
 601 source "mm/Kconfig"
 602
 603 config ARCH_MEMORY_PROBE
 604         def_bool y
 605         depends on MEMORY_HOTPLUG
 606
 607 # Some NUMA nodes have memory ranges that span
 608 # other nodes.  Even though a pfn is valid and
 609 # between a node's start and end pfns, it may not
 610 # reside on that node.  See memmap_init_zone()
 611 # for details.
 612 config NODES_SPAN_OTHER_NODES
 613         def_bool y
 614         depends on NEED_MULTIPLE_NODES
 615
 616 config STDBINUTILS
 617         bool "Using standard binutils settings"
 618         depends on 44x
 619         default y
 620         help
 621           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 622           Note, that kernel will be able to run only those applications,
 623           which had been compiled using binutils later than 2.17.50.0.3 with
 624           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 625           the older binutils, you can patch them with a trivial patch, which
 626           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 627
 628 choice
 629         prompt "Page size"
 630         default PPC_4K_PAGES
 631         help
 632           Select the kernel logical page size. Increasing the page size
 633           will reduce software overhead at each page boundary, allow
 634           hardware prefetch mechanisms to be more effective, and allow
 635           larger dma transfers increasing IO efficiency and reducing
 636           overhead. However the utilization of memory will increase.
 637           For example, each cached file will using a multiple of the
 638           page size to hold its contents and the difference between the
 639           end of file and the end of page is wasted.
 640
 641           Some dedicated systems, such as software raid serving with
 642           accelerated calculations, have shown significant increases.
 643
 644           If you configure a 64 bit kernel for 64k pages but the
 645           processor does not support them, then the kernel will simulate
 646           them with 4k pages, loading them on demand, but with the
 647           reduced software overhead and larger internal fragmentation.
 648           For the 32 bit kernel, a large page option will not be offered
 649           unless it is supported by the configured processor.
 650
 651           If unsure, choose 4K_PAGES.
 652
 653 config PPC_4K_PAGES
 654         bool "4k page size"
 655         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 656
 657 config PPC_16K_PAGES
 658         bool "16k page size"
 659         depends on 44x || PPC_8xx
 660
 661 config PPC_64K_PAGES
 662         bool "64k page size"
 663         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 664         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 665
 666 config PPC_256K_PAGES
 667         bool "256k page size"
 668         depends on 44x && !STDBINUTILS
 669         help
 670           Make the page size 256k.
 671
 672           As the ELF standard only requires alignment to support page
 673           sizes up to 64k, you will need to compile all of your user
 674           space applications with a non-standard binutils settings
 675           (see the STDBINUTILS description for details).
 676
 677           Say N unless you know what you are doing.
 678
 679 endchoice
 680
 681 config FORCE_MAX_ZONEORDER
 682         int "Maximum zone order"
 683         range 8 9 if PPC64 && PPC_64K_PAGES
 684         default "9" if PPC64 && PPC_64K_PAGES
 685         range 13 13 if PPC64 && !PPC_64K_PAGES
 686         default "13" if PPC64 && !PPC_64K_PAGES
 687         range 9 64 if PPC32 && PPC_16K_PAGES
 688         default "9" if PPC32 && PPC_16K_PAGES
 689         range 7 64 if PPC32 && PPC_64K_PAGES
 690         default "7" if PPC32 && PPC_64K_PAGES
 691         range 5 64 if PPC32 && PPC_256K_PAGES
 692         default "5" if PPC32 && PPC_256K_PAGES
 693         range 11 64
 694         default "11"
 695         help
 696           The kernel memory allocator divides physically contiguous memory
 697           blocks into "zones", where each zone is a power of two number of
 698           pages.  This option selects the largest power of two that the kernel
 699           keeps in the memory allocator.  If you need to allocate very large
 700           blocks of physically contiguous memory, then you may need to
 701           increase this value.
 702
 703           This config option is actually maximum order plus one. For example,
 704           a value of 11 means that the largest free memory block is 2^10 pages.
 705
 706           The page size is not necessarily 4KB.  For example, on 64-bit
 707           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 708           this in mind when choosing a value for this option.
 709
 710 config PPC_SUBPAGE_PROT
 711         bool "Support setting protections for 4k subpages"
 712         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 713         help
 714           This option adds support for a system call to allow user programs
 715           to set access permissions (read/write, readonly, or no access)
 716           on the 4k subpages of each 64k page.
 717
 718 config PPC_COPRO_BASE
 719         bool
 720         default n
 721
 722 config SCHED_SMT
 723         bool "SMT (Hyperthreading) scheduler support"
 724         depends on PPC64 && SMP
 725         help
 726           SMT scheduler support improves the CPU scheduler's decision making
 727           when dealing with POWER5 cpus at a cost of slightly increased
 728           overhead in some places. If unsure say N here.
 729
 730 config PPC_DENORMALISATION
 731         bool "PowerPC denormalisation exception handling"
 732         depends on PPC_BOOK3S_64
 733         default "y" if PPC_POWERNV
 734         ---help---
 735           Add support for handling denormalisation of single precision
 736           values.  Useful for bare metal only.  If unsure say Y here.
 737
 738 config CMDLINE_BOOL
 739         bool "Default bootloader kernel arguments"
 740
 741 config CMDLINE
 742         string "Initial kernel command string"
 743         depends on CMDLINE_BOOL
 744         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 745         help
 746           On some platforms, there is currently no way for the boot loader to
 747           pass arguments to the kernel. For these platforms, you can supply
 748           some command-line options at build time by entering them here.  In
 749           most cases you will need to specify the root device here.
 750
 751 config CMDLINE_FORCE
 752         bool "Always use the default kernel command string"
 753         depends on CMDLINE_BOOL
 754         help
 755           Always use the default kernel command string, even if the boot
 756           loader passes other arguments to the kernel.
 757           This is useful if you cannot or don't want to change the
 758           command-line options your boot loader passes to the kernel.
 759
 760 config EXTRA_TARGETS
 761         string "Additional default image types"
 762         help
 763           List additional targets to be built by the bootwrapper here (separated
 764           by spaces).  This is useful for targets that depend of device tree
 765           files in the .dts directory.
 766
 767           Targets in this list will be build as part of the default build
 768           target, or when the user does a 'make zImage' or a
 769           'make zImage.initrd'.
 770
 771           If unsure, leave blank
 772
 773 config ARCH_WANTS_FREEZER_CONTROL
 774         def_bool y
 775         depends on ADB_PMU
 776
 777 source kernel/power/Kconfig
 778
 779 config SECCOMP
 780         bool "Enable seccomp to safely compute untrusted bytecode"
 781         depends on PROC_FS
 782         default y
 783         help
 784           This kernel feature is useful for number crunching applications
 785           that may need to compute untrusted bytecode during their
 786           execution. By using pipes or other transports made available to
 787           the process as file descriptors supporting the read/write
 788           syscalls, it's possible to isolate those applications in
 789           their own address space using seccomp. Once seccomp is
 790           enabled via /proc/<pid>/seccomp, it cannot be disabled
 791           and the task is only allowed to execute a few safe syscalls
 792           defined by each seccomp mode.
 793
 794           If unsure, say Y. Only embedded should say N here.
 795
 796 endmenu
 797
 798 config ISA_DMA_API
 799         bool
 800         default PCI
 801
 802 menu "Bus options"
 803
 804 config ISA
 805         bool "Support for ISA-bus hardware"
 806         depends on PPC_CHRP
 807         select PPC_I8259
 808         help
 809           Find out whether you have ISA slots on your motherboard.  ISA is the
 810           name of a bus system, i.e. the way the CPU talks to the other stuff
 811           inside your box.  If you have an Apple machine, say N here; if you
 812           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 813           embedded board, consult your board documentation.
 814
 815 config ZONE_DMA
 816         bool
 817         default y
 818
 819 config NEED_DMA_MAP_STATE
 820         def_bool (PPC64 || NOT_COHERENT_CACHE)
 821
 822 config NEED_SG_DMA_LENGTH
 823         def_bool y
 824
 825 config GENERIC_ISA_DMA
 826         bool
 827         depends on ISA_DMA_API
 828         default y
 829
 830 config PPC_INDIRECT_PCI
 831         bool
 832         depends on PCI
 833         default y if 40x || 44x
 834         default n
 835
 836 config EISA
 837         bool
 838
 839 config SBUS
 840         bool
 841
 842 config FSL_SOC
 843         bool
 844
 845 config FSL_PCI
 846         bool
 847         select PPC_INDIRECT_PCI
 848         select PCI_QUIRKS
 849
 850 config FSL_PMC
 851         bool
 852         default y
 853         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 854         help
 855           Freescale MPC85xx/MPC86xx power management controller support
 856           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 857
 858 config PPC4xx_CPM
 859         bool
 860         default y
 861         depends on SUSPEND && (44x || 40x)
 862         help
 863           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 864           It also enables support for two different idle states (idle-wait
 865           and idle-doze).
 866
 867 config 4xx_SOC
 868         bool
 869
 870 config FSL_LBC
 871         bool "Freescale Local Bus support"
 872         help
 873           Enables reporting of errors from the Freescale local bus
 874           controller.  Also contains some common code used by
 875           drivers for specific local bus peripherals.
 876
 877 config FSL_GTM
 878         bool
 879         depends on PPC_83xx || QUICC_ENGINE || CPM2
 880         help
 881           Freescale General-purpose Timers support
 882
 883 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 884 config MCA
 885         bool
 886
 887 # Platforms that what PCI turned unconditionally just do select PCI
 888 # in their config node.  Platforms that want to choose at config
 889 # time should select PPC_PCI_CHOICE
 890 config PPC_PCI_CHOICE
 891         bool
 892
 893 config PCI
 894         bool "PCI support" if PPC_PCI_CHOICE
 895         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 896                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 897         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 898         select GENERIC_PCI_IOMAP
 899         help
 900           Find out whether your system includes a PCI bus. PCI is the name of
 901           a bus system, i.e. the way the CPU talks to the other stuff inside
 902           your box.  If you say Y here, the kernel will include drivers and
 903           infrastructure code to support PCI bus devices.
 904
 905 config PCI_DOMAINS
 906         def_bool PCI
 907
 908 config PCI_SYSCALL
 909         def_bool PCI
 910
 911 config PCI_QSPAN
 912         bool "QSpan PCI"
 913         depends on !4xx && !CPM2 && 8xx
 914         select PPC_I8259
 915         help
 916           Say Y here if you have a system based on a Motorola 8xx-series
 917           embedded processor with a QSPAN PCI interface, otherwise say N.
 918
 919 config PCI_8260
 920         bool
 921         depends on PCI && 8260
 922         select PPC_INDIRECT_PCI
 923         default y
 924
 925 source "drivers/pci/Kconfig"
 926
 927 source "drivers/pcmcia/Kconfig"
 928
 929 config HAS_RAPIDIO
 930         bool
 931         default n
 932
 933 config RAPIDIO
 934         tristate "RapidIO support"
 935         depends on HAS_RAPIDIO || PCI
 936         help
 937           If you say Y here, the kernel will include drivers and
 938           infrastructure code to support RapidIO interconnect devices.
 939
 940 config FSL_RIO
 941         bool "Freescale Embedded SRIO Controller support"
 942         depends on RAPIDIO = y && HAS_RAPIDIO
 943         default "n"
 944         ---help---
 945           Include support for RapidIO controller on Freescale embedded
 946           processors (MPC8548, MPC8641, etc).
 947
 948 source "drivers/rapidio/Kconfig"
 949
 950 endmenu
 951
 952 config NONSTATIC_KERNEL
 953         bool
 954         default n
 955
 956 menu "Advanced setup"
 957         depends on PPC32
 958
 959 config ADVANCED_OPTIONS
 960         bool "Prompt for advanced kernel configuration options"
 961         help
 962           This option will enable prompting for a variety of advanced kernel
 963           configuration options.  These options can cause the kernel to not
 964           work if they are set incorrectly, but can be used to optimize certain
 965           aspects of kernel memory management.
 966
 967           Unless you know what you are doing, say N here.
 968
 969 comment "Default settings for advanced configuration options are used"
 970         depends on !ADVANCED_OPTIONS
 971
 972 config LOWMEM_SIZE_BOOL
 973         bool "Set maximum low memory"
 974         depends on ADVANCED_OPTIONS
 975         help
 976           This option allows you to set the maximum amount of memory which
 977           will be used as "low memory", that is, memory which the kernel can
 978           access directly, without having to set up a kernel virtual mapping.
 979           This can be useful in optimizing the layout of kernel virtual
 980           memory.
 981
 982           Say N here unless you know what you are doing.
 983
 984 config LOWMEM_SIZE
 985         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 986         default "0x30000000"
 987
 988 config LOWMEM_CAM_NUM_BOOL
 989         bool "Set number of CAMs to use to map low memory"
 990         depends on ADVANCED_OPTIONS && FSL_BOOKE
 991         help
 992           This option allows you to set the maximum number of CAM slots that
 993           will be used to map low memory.  There are a limited number of slots
 994           available and even more limited number that will fit in the L1 MMU.
 995           However, using more entries will allow mapping more low memory.  This
 996           can be useful in optimizing the layout of kernel virtual memory.
 997
 998           Say N here unless you know what you are doing.
 999
1000 config LOWMEM_CAM_NUM
1001         depends on FSL_BOOKE
1002         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1003         default 3
1004
1005 config DYNAMIC_MEMSTART
1006         bool "Enable page aligned dynamic load address for kernel"
1007         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1008         select NONSTATIC_KERNEL
1009         help
1010           This option enables the kernel to be loaded at any page aligned
1011           physical address. The kernel creates a mapping from KERNELBASE to
1012           the address where the kernel is loaded. The page size here implies
1013           the TLB page size of the mapping for kernel on the particular platform.
1014           Please refer to the init code for finding the TLB page size.
1015
1016           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1017           kernel image, where the only restriction is the page aligned kernel
1018           load address. When this option is enabled, the compile time physical
1019           address CONFIG_PHYSICAL_START is ignored.
1020
1021           This option is overridden by CONFIG_RELOCATABLE
1022
1023 config PAGE_OFFSET_BOOL
1024         bool "Set custom page offset address"
1025         depends on ADVANCED_OPTIONS
1026         help
1027           This option allows you to set the kernel virtual address at which
1028           the kernel will map low memory.  This can be useful in optimizing
1029           the virtual memory layout of the system.
1030
1031           Say N here unless you know what you are doing.
1032
1033 config PAGE_OFFSET
1034         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1035         default "0xc0000000"
1036
1037 config KERNEL_START_BOOL
1038         bool "Set custom kernel base address"
1039         depends on ADVANCED_OPTIONS
1040         help
1041           This option allows you to set the kernel virtual address at which
1042           the kernel will be loaded.  Normally this should match PAGE_OFFSET
1043           however there are times (like kdump) that one might not want them
1044           to be the same.
1045
1046           Say N here unless you know what you are doing.
1047
1048 config KERNEL_START
1049         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1050         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1051         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1052         default "0xc0000000"
1053
1054 config PHYSICAL_START_BOOL
1055         bool "Set physical address where the kernel is loaded"
1056         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1057         help
1058           This gives the physical address where the kernel is loaded.
1059
1060           Say N here unless you know what you are doing.
1061
1062 config PHYSICAL_START
1063         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1064         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1065         default "0x00000000"
1066
1067 config PHYSICAL_ALIGN
1068         hex
1069         default "0x04000000" if FSL_BOOKE
1070         help
1071           This value puts the alignment restrictions on physical address
1072           where kernel is loaded and run from. Kernel is compiled for an
1073           address which meets above alignment restriction.
1074
1075 config TASK_SIZE_BOOL
1076         bool "Set custom user task size"
1077         depends on ADVANCED_OPTIONS
1078         help
1079           This option allows you to set the amount of virtual address space
1080           allocated to user tasks.  This can be useful in optimizing the
1081           virtual memory layout of the system.
1082
1083           Say N here unless you know what you are doing.
1084
1085 config TASK_SIZE
1086         hex "Size of user task space" if TASK_SIZE_BOOL
1087         default "0x80000000" if PPC_8xx
1088         default "0xc0000000"
1089
1090 config CONSISTENT_SIZE_BOOL
1091         bool "Set custom consistent memory pool size"
1092         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1093         help
1094           This option allows you to set the size of the
1095           consistent memory pool.  This pool of virtual memory
1096           is used to make consistent memory allocations.
1097
1098 config CONSISTENT_SIZE
1099         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1100         default "0x00200000" if NOT_COHERENT_CACHE
1101
1102 config PIN_TLB
1103         bool "Pinned Kernel TLBs (860 ONLY)"
1104         depends on ADVANCED_OPTIONS && 8xx
1105
1106 config PIN_TLB_IMMR
1107         bool "Pinned TLB for IMMR"
1108         depends on PIN_TLB
1109         default y
1110 endmenu
1111
1112 if PPC64
1113 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1114 config PAGE_OFFSET
1115         hex
1116         default "0xc000000000000000"
1117 config KERNEL_START
1118         hex
1119         default "0xc000000000000000"
1120 config PHYSICAL_START
1121         hex
1122         default "0x00000000"
1123 endif
1124
1125 config  ARCH_RANDOM
1126         def_bool n
1127
1128 source "net/Kconfig"
1129
1130 source "drivers/Kconfig"
1131
1132 source "fs/Kconfig"
1133
1134 source "lib/Kconfig"
1135
1136 source "arch/powerpc/Kconfig.debug"
1137
1138 source "security/Kconfig"
1139
1140 config KEYS_COMPAT
1141         bool
1142         depends on COMPAT && KEYS
1143         default y
1144
1145 source "crypto/Kconfig"
1146
1147 config PPC_LIB_RHEAP
1148         bool
1149
1150 source "arch/powerpc/kvm/Kconfig"
1151
1152 source "kernel/livepatch/Kconfig"