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