arch/powerpc/Kconfig

   1 source "arch/powerpc/platforms/Kconfig.cputype"
   2
   3 config PPC32
   4         bool
   5         default y if !PPC64
   6
   7 config 32BIT
   8         bool
   9         default y if PPC32
  10
  11 config 64BIT
  12         bool
  13         default y if PPC64
  14
  15 config WORD_SIZE
  16         int
  17         default 64 if PPC64
  18         default 32 if !PPC64
  19
  20 config ARCH_PHYS_ADDR_T_64BIT
  21        def_bool PPC64 || PHYS_64BIT
  22
  23 config ARCH_DMA_ADDR_T_64BIT
  24         def_bool ARCH_PHYS_ADDR_T_64BIT
  25
  26 config MMU
  27         bool
  28         default y
  29
  30 config HAVE_SETUP_PER_CPU_AREA
  31         def_bool PPC64
  32
  33 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  34         def_bool PPC64
  35
  36 config NR_IRQS
  37         int "Number of virtual interrupt numbers"
  38         range 32 32768
  39         default "512"
  40         help
  41           This defines the number of virtual interrupt numbers the kernel
  42           can manage. Virtual interrupt numbers are what you see in
  43           /proc/interrupts. If you configure your system to have too few,
  44           drivers will fail to load or worse - handle with care.
  45
  46 config STACKTRACE_SUPPORT
  47         bool
  48         default y
  49
  50 config TRACE_IRQFLAGS_SUPPORT
  51         bool
  52         default y
  53
  54 config LOCKDEP_SUPPORT
  55         bool
  56         default y
  57
  58 config RWSEM_GENERIC_SPINLOCK
  59         bool
  60
  61 config RWSEM_XCHGADD_ALGORITHM
  62         bool
  63         default y
  64
  65 config GENERIC_LOCKBREAK
  66         bool
  67         default y
  68         depends on SMP && PREEMPT
  69
  70 config ARCH_HAS_ILOG2_U32
  71         bool
  72         default y
  73
  74 config ARCH_HAS_ILOG2_U64
  75         bool
  76         default y if 64BIT
  77
  78 config GENERIC_HWEIGHT
  79         bool
  80         default y
  81
  82 config ARCH_HAS_DMA_SET_COHERENT_MASK
  83         bool
  84
  85 config PPC
  86         bool
  87         default y
  88         select ARCH_MIGHT_HAVE_PC_PARPORT
  89         select ARCH_MIGHT_HAVE_PC_SERIO
  90         select BINFMT_ELF
  91         select ARCH_HAS_ELF_RANDOMIZE
  92         select OF
  93         select OF_EARLY_FLATTREE
  94         select OF_RESERVED_MEM
  95         select HAVE_FTRACE_MCOUNT_RECORD
  96         select HAVE_DYNAMIC_FTRACE
  97         select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
  98         select HAVE_FUNCTION_TRACER
  99         select HAVE_FUNCTION_GRAPH_TRACER
 100         select SYSCTL_EXCEPTION_TRACE
 101         select VIRT_TO_BUS if !PPC64
 102         select HAVE_IDE
 103         select HAVE_IOREMAP_PROT
 104         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
 105         select HAVE_KPROBES
 106         select HAVE_ARCH_KGDB
 107         select HAVE_KRETPROBES
 108         select HAVE_ARCH_TRACEHOOK
 109         select HAVE_MEMBLOCK
 110         select HAVE_MEMBLOCK_NODE_MAP
 111         select HAVE_DMA_API_DEBUG
 112         select HAVE_OPROFILE
 113         select HAVE_DEBUG_KMEMLEAK
 114         select ARCH_HAS_SG_CHAIN
 115         select GENERIC_ATOMIC64 if PPC32
 116         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 117         select HAVE_PERF_EVENTS
 118         select HAVE_PERF_REGS
 119         select HAVE_PERF_USER_STACK_DUMP
 120         select HAVE_REGS_AND_STACK_ACCESS_API
 121         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 122         select ARCH_WANT_IPC_PARSE_VERSION
 123         select SPARSE_IRQ
 124         select IRQ_DOMAIN
 125         select GENERIC_IRQ_SHOW
 126         select GENERIC_IRQ_SHOW_LEVEL
 127         select IRQ_FORCED_THREADING
 128         select HAVE_RCU_TABLE_FREE if SMP
 129         select HAVE_SYSCALL_TRACEPOINTS
 130         select HAVE_CBPF_JIT if !PPC64
 131         select HAVE_EBPF_JIT if PPC64
 132         select HAVE_ARCH_JUMP_LABEL
 133         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 134         select ARCH_HAS_GCOV_PROFILE_ALL
 135         select GENERIC_SMP_IDLE_THREAD
 136         select GENERIC_CMOS_UPDATE
 137         select GENERIC_TIME_VSYSCALL_OLD
 138         select GENERIC_CLOCKEVENTS
 139         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 140         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 141         select GENERIC_STRNCPY_FROM_USER
 142         select GENERIC_STRNLEN_USER
 143         select HAVE_MOD_ARCH_SPECIFIC
 144         select MODULES_USE_ELF_RELA
 145         select CLONE_BACKWARDS
 146         select ARCH_USE_BUILTIN_BSWAP
 147         select OLD_SIGSUSPEND
 148         select OLD_SIGACTION if PPC32
 149         select HAVE_DEBUG_STACKOVERFLOW
 150         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 151         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 152         select HAVE_ARCH_AUDITSYSCALL
 153         select ARCH_SUPPORTS_ATOMIC_RMW
 154         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 155         select NO_BOOTMEM
 156         select HAVE_GENERIC_RCU_GUP
 157         select HAVE_PERF_EVENTS_NMI if PPC64
 158         select HAVE_NMI if PERF_EVENTS
 159         select EDAC_SUPPORT
 160         select EDAC_ATOMIC_SCRUB
 161         select ARCH_HAS_DMA_SET_COHERENT_MASK
 162         select ARCH_HAS_DEVMEM_IS_ALLOWED
 163         select HAVE_ARCH_SECCOMP_FILTER
 164         select ARCH_HAS_UBSAN_SANITIZE_ALL
 165         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 166         select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
 167         select GENERIC_CPU_AUTOPROBE
 168         select HAVE_VIRT_CPU_ACCOUNTING
 169
 170 config GENERIC_CSUM
 171         def_bool CPU_LITTLE_ENDIAN
 172
 173 config EARLY_PRINTK
 174         bool
 175         default y
 176
 177 config PANIC_TIMEOUT
 178         int
 179         default 180
 180
 181 config COMPAT
 182         bool
 183         default y if PPC64
 184         select COMPAT_BINFMT_ELF
 185         select ARCH_WANT_OLD_COMPAT_IPC
 186         select COMPAT_OLD_SIGACTION
 187
 188 config SYSVIPC_COMPAT
 189         bool
 190         depends on COMPAT && SYSVIPC
 191         default y
 192
 193 # All PPC32s use generic nvram driver through ppc_md
 194 config GENERIC_NVRAM
 195         bool
 196         default y if PPC32
 197
 198 config SCHED_OMIT_FRAME_POINTER
 199         bool
 200         default y
 201
 202 config ARCH_MAY_HAVE_PC_FDC
 203         bool
 204         default PCI
 205
 206 config PPC_UDBG_16550
 207         bool
 208         default n
 209
 210 config GENERIC_TBSYNC
 211         bool
 212         default y if PPC32 && SMP
 213         default n
 214
 215 config AUDIT_ARCH
 216         bool
 217         default y
 218
 219 config GENERIC_BUG
 220         bool
 221         default y
 222         depends on BUG
 223
 224 config SYS_SUPPORTS_APM_EMULATION
 225         default y if PMAC_APM_EMU
 226         bool
 227
 228 config EPAPR_BOOT
 229         bool
 230         help
 231           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 232         default n
 233
 234 config DEFAULT_UIMAGE
 235         bool
 236         help
 237           Used to allow a board to specify it wants a uImage built by default
 238         default n
 239
 240 config ARCH_HIBERNATION_POSSIBLE
 241         bool
 242         default y
 243
 244 config ARCH_SUSPEND_POSSIBLE
 245         def_bool y
 246         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 247                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 248                    || 44x || 40x
 249
 250 config PPC_DCR_NATIVE
 251         bool
 252         default n
 253
 254 config PPC_DCR_MMIO
 255         bool
 256         default n
 257
 258 config PPC_DCR
 259         bool
 260         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 261         default y
 262
 263 config PPC_OF_PLATFORM_PCI
 264         bool
 265         depends on PCI
 266         depends on PPC64 # not supported on 32 bits yet
 267         default n
 268
 269 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 270         depends on PPC32 || PPC_STD_MMU_64
 271         def_bool y
 272
 273 config ARCH_SUPPORTS_UPROBES
 274         def_bool y
 275
 276 config PPC_ADV_DEBUG_REGS
 277         bool
 278         depends on 40x || BOOKE
 279         default y
 280
 281 config PPC_ADV_DEBUG_IACS
 282         int
 283         depends on PPC_ADV_DEBUG_REGS
 284         default 4 if 44x
 285         default 2
 286
 287 config PPC_ADV_DEBUG_DACS
 288         int
 289         depends on PPC_ADV_DEBUG_REGS
 290         default 2
 291
 292 config PPC_ADV_DEBUG_DVCS
 293         int
 294         depends on PPC_ADV_DEBUG_REGS
 295         default 2 if 44x
 296         default 0
 297
 298 config PPC_ADV_DEBUG_DAC_RANGE
 299         bool
 300         depends on PPC_ADV_DEBUG_REGS && 44x
 301         default y
 302
 303 config PPC_EMULATE_SSTEP
 304         bool
 305         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 306
 307 config ZONE_DMA32
 308         bool
 309         default y if PPC64
 310
 311 config PGTABLE_LEVELS
 312         int
 313         default 2 if !PPC64
 314         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 315         default 4
 316
 317 source "init/Kconfig"
 318
 319 source "kernel/Kconfig.freezer"
 320
 321 source "arch/powerpc/sysdev/Kconfig"
 322 source "arch/powerpc/platforms/Kconfig"
 323
 324 menu "Kernel options"
 325
 326 config HIGHMEM
 327         bool "High memory support"
 328         depends on PPC32
 329
 330 source kernel/Kconfig.hz
 331 source kernel/Kconfig.preempt
 332 source "fs/Kconfig.binfmt"
 333
 334 config HUGETLB_PAGE_SIZE_VARIABLE
 335         bool
 336         depends on HUGETLB_PAGE
 337         default y
 338
 339 config MATH_EMULATION
 340         bool "Math emulation"
 341         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 342         ---help---
 343           Some PowerPC chips designed for embedded applications do not have
 344           a floating-point unit and therefore do not implement the
 345           floating-point instructions in the PowerPC instruction set.  If you
 346           say Y here, the kernel will include code to emulate a floating-point
 347           unit, which will allow programs that use floating-point
 348           instructions to run.
 349
 350           This is also useful to emulate missing (optional) instructions
 351           such as fsqrt on cores that do have an FPU but do not implement
 352           them (such as Freescale BookE).
 353
 354 choice
 355         prompt "Math emulation options"
 356         default MATH_EMULATION_FULL
 357         depends on MATH_EMULATION
 358
 359 config  MATH_EMULATION_FULL
 360         bool "Emulate all the floating point instructions"
 361         ---help---
 362           Select this option will enable the kernel to support to emulate
 363           all the floating point instructions. If your SoC doesn't have
 364           a FPU, you should select this.
 365
 366 config MATH_EMULATION_HW_UNIMPLEMENTED
 367         bool "Just emulate the FPU unimplemented instructions"
 368         ---help---
 369           Select this if you know there does have a hardware FPU on your
 370           SoC, but some floating point instructions are not implemented by that.
 371
 372 endchoice
 373
 374 config PPC_TRANSACTIONAL_MEM
 375        bool "Transactional Memory support for POWERPC"
 376        depends on PPC_BOOK3S_64
 377        depends on SMP
 378        select ALTIVEC
 379        select VSX
 380        default n
 381        ---help---
 382          Support user-mode Transactional Memory on POWERPC.
 383
 384 config DISABLE_MPROFILE_KERNEL
 385         bool "Disable use of mprofile-kernel for kernel tracing"
 386         depends on PPC64 && CPU_LITTLE_ENDIAN
 387         default y
 388         help
 389           Selecting this options disables use of the mprofile-kernel ABI for
 390           kernel tracing. That will cause options such as live patching
 391           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 392           be disabled also.
 393
 394           If you have a toolchain which supports mprofile-kernel, then you can
 395           enable this. Otherwise leave it disabled. If you're not sure, say
 396           "N".
 397
 398 config MPROFILE_KERNEL
 399         depends on PPC64 && CPU_LITTLE_ENDIAN
 400         def_bool !DISABLE_MPROFILE_KERNEL
 401
 402 config IOMMU_HELPER
 403         def_bool PPC64
 404
 405 config SWIOTLB
 406         bool "SWIOTLB support"
 407         default n
 408         select IOMMU_HELPER
 409         ---help---
 410           Support for IO bounce buffering for systems without an IOMMU.
 411           This allows us to DMA to the full physical address space on
 412           platforms where the size of a physical address is larger
 413           than the bus address.  Not all platforms support this.
 414
 415 config HOTPLUG_CPU
 416         bool "Support for enabling/disabling CPUs"
 417         depends on SMP && (PPC_PSERIES || \
 418         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 419         ---help---
 420           Say Y here to be able to disable and re-enable individual
 421           CPUs at runtime on SMP machines.
 422
 423           Say N if you are unsure.
 424
 425 config ARCH_CPU_PROBE_RELEASE
 426         def_bool y
 427         depends on HOTPLUG_CPU
 428
 429 config ARCH_ENABLE_MEMORY_HOTPLUG
 430         def_bool y
 431
 432 config ARCH_HAS_WALK_MEMORY
 433         def_bool y
 434
 435 config ARCH_ENABLE_MEMORY_HOTREMOVE
 436         def_bool y
 437
 438 config PPC64_SUPPORTS_MEMORY_FAILURE
 439         bool "Add support for memory hwpoison"
 440         depends on PPC_BOOK3S_64
 441         default "y" if PPC_POWERNV
 442         select ARCH_SUPPORTS_MEMORY_FAILURE
 443
 444 config KEXEC
 445         bool "kexec system call"
 446         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 447         select KEXEC_CORE
 448         help
 449           kexec is a system call that implements the ability to shutdown your
 450           current kernel, and to start another kernel.  It is like a reboot
 451           but it is independent of the system firmware.   And like a reboot
 452           you can start any kernel with it, not just Linux.
 453
 454           The name comes from the similarity to the exec system call.
 455
 456           It is an ongoing process to be certain the hardware in a machine
 457           is properly shutdown, so do not be surprised if this code does not
 458           initially work for you.  As of this writing the exact hardware
 459           interface is strongly in flux, so no good recommendation can be
 460           made.
 461
 462 config RELOCATABLE
 463         bool "Build a relocatable kernel"
 464         depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
 465         select NONSTATIC_KERNEL
 466         help
 467           This builds a kernel image that is capable of running at the
 468           location the kernel is loaded at. For ppc32, there is no any
 469           alignment restrictions, and this feature is a superset of
 470           DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 471           16k-aligned base address. The kernel is linked as a
 472           position-independent executable (PIE) and contains dynamic relocations
 473           which are processed early in the bootup process.
 474
 475           One use is for the kexec on panic case where the recovery kernel
 476           must live at a different physical address than the primary
 477           kernel.
 478
 479           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 480           it has been loaded at and the compile time physical addresses
 481           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 482           setting can still be useful to bootwrappers that need to know the
 483           load address of the kernel (eg. u-boot/mkimage).
 484
 485 config CRASH_DUMP
 486         bool "Build a kdump crash kernel"
 487         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 488         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 489         help
 490           Build a kernel suitable for use as a kdump capture kernel.
 491           The same kernel binary can be used as production kernel and dump
 492           capture kernel.
 493
 494 config FA_DUMP
 495         bool "Firmware-assisted dump"
 496         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 497         help
 498           A robust mechanism to get reliable kernel crash dump with
 499           assistance from firmware. This approach does not use kexec,
 500           instead firmware assists in booting the kdump kernel
 501           while preserving memory contents. Firmware-assisted dump
 502           is meant to be a kdump replacement offering robustness and
 503           speed not possible without system firmware assistance.
 504
 505           If unsure, say "N"
 506
 507 config IRQ_ALL_CPUS
 508         bool "Distribute interrupts on all CPUs by default"
 509         depends on SMP
 510         help
 511           This option gives the kernel permission to distribute IRQs across
 512           multiple CPUs.  Saying N here will route all IRQs to the first
 513           CPU.  Generally saying Y is safe, although some problems have been
 514           reported with SMP Power Macintoshes with this option enabled.
 515
 516 config NUMA
 517         bool "NUMA support"
 518         depends on PPC64
 519         default y if SMP && PPC_PSERIES
 520
 521 config NODES_SHIFT
 522         int
 523         default "8" if PPC64
 524         default "4"
 525         depends on NEED_MULTIPLE_NODES
 526
 527 config USE_PERCPU_NUMA_NODE_ID
 528         def_bool y
 529         depends on NUMA
 530
 531 config HAVE_MEMORYLESS_NODES
 532         def_bool y
 533         depends on NUMA
 534
 535 config ARCH_SELECT_MEMORY_MODEL
 536         def_bool y
 537         depends on PPC64
 538
 539 config ARCH_FLATMEM_ENABLE
 540         def_bool y
 541         depends on (PPC64 && !NUMA) || PPC32
 542
 543 config ARCH_SPARSEMEM_ENABLE
 544         def_bool y
 545         depends on PPC64
 546         select SPARSEMEM_VMEMMAP_ENABLE
 547
 548 config ARCH_SPARSEMEM_DEFAULT
 549         def_bool y
 550         depends on (SMP && PPC_PSERIES) || PPC_PS3
 551
 552 config SYS_SUPPORTS_HUGETLBFS
 553         bool
 554
 555 source "mm/Kconfig"
 556
 557 config ARCH_MEMORY_PROBE
 558         def_bool y
 559         depends on MEMORY_HOTPLUG
 560
 561 # Some NUMA nodes have memory ranges that span
 562 # other nodes.  Even though a pfn is valid and
 563 # between a node's start and end pfns, it may not
 564 # reside on that node.  See memmap_init_zone()
 565 # for details.
 566 config NODES_SPAN_OTHER_NODES
 567         def_bool y
 568         depends on NEED_MULTIPLE_NODES
 569
 570 config STDBINUTILS
 571         bool "Using standard binutils settings"
 572         depends on 44x
 573         default y
 574         help
 575           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 576           Note, that kernel will be able to run only those applications,
 577           which had been compiled using binutils later than 2.17.50.0.3 with
 578           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 579           the older binutils, you can patch them with a trivial patch, which
 580           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 581
 582 choice
 583         prompt "Page size"
 584         default PPC_4K_PAGES
 585         help
 586           Select the kernel logical page size. Increasing the page size
 587           will reduce software overhead at each page boundary, allow
 588           hardware prefetch mechanisms to be more effective, and allow
 589           larger dma transfers increasing IO efficiency and reducing
 590           overhead. However the utilization of memory will increase.
 591           For example, each cached file will using a multiple of the
 592           page size to hold its contents and the difference between the
 593           end of file and the end of page is wasted.
 594
 595           Some dedicated systems, such as software raid serving with
 596           accelerated calculations, have shown significant increases.
 597
 598           If you configure a 64 bit kernel for 64k pages but the
 599           processor does not support them, then the kernel will simulate
 600           them with 4k pages, loading them on demand, but with the
 601           reduced software overhead and larger internal fragmentation.
 602           For the 32 bit kernel, a large page option will not be offered
 603           unless it is supported by the configured processor.
 604
 605           If unsure, choose 4K_PAGES.
 606
 607 config PPC_4K_PAGES
 608         bool "4k page size"
 609         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 610
 611 config PPC_16K_PAGES
 612         bool "16k page size"
 613         depends on 44x || PPC_8xx
 614
 615 config PPC_64K_PAGES
 616         bool "64k page size"
 617         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 618         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 619
 620 config PPC_256K_PAGES
 621         bool "256k page size"
 622         depends on 44x && !STDBINUTILS
 623         help
 624           Make the page size 256k.
 625
 626           As the ELF standard only requires alignment to support page
 627           sizes up to 64k, you will need to compile all of your user
 628           space applications with a non-standard binutils settings
 629           (see the STDBINUTILS description for details).
 630
 631           Say N unless you know what you are doing.
 632
 633 endchoice
 634
 635 config FORCE_MAX_ZONEORDER
 636         int "Maximum zone order"
 637         range 8 9 if PPC64 && PPC_64K_PAGES
 638         default "9" if PPC64 && PPC_64K_PAGES
 639         range 9 13 if PPC64 && !PPC_64K_PAGES
 640         default "13" if PPC64 && !PPC_64K_PAGES
 641         range 9 64 if PPC32 && PPC_16K_PAGES
 642         default "9" if PPC32 && PPC_16K_PAGES
 643         range 7 64 if PPC32 && PPC_64K_PAGES
 644         default "7" if PPC32 && PPC_64K_PAGES
 645         range 5 64 if PPC32 && PPC_256K_PAGES
 646         default "5" if PPC32 && PPC_256K_PAGES
 647         range 11 64
 648         default "11"
 649         help
 650           The kernel memory allocator divides physically contiguous memory
 651           blocks into "zones", where each zone is a power of two number of
 652           pages.  This option selects the largest power of two that the kernel
 653           keeps in the memory allocator.  If you need to allocate very large
 654           blocks of physically contiguous memory, then you may need to
 655           increase this value.
 656
 657           This config option is actually maximum order plus one. For example,
 658           a value of 11 means that the largest free memory block is 2^10 pages.
 659
 660           The page size is not necessarily 4KB.  For example, on 64-bit
 661           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 662           this in mind when choosing a value for this option.
 663
 664 config PPC_SUBPAGE_PROT
 665         bool "Support setting protections for 4k subpages"
 666         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 667         help
 668           This option adds support for a system call to allow user programs
 669           to set access permissions (read/write, readonly, or no access)
 670           on the 4k subpages of each 64k page.
 671
 672 config PPC_COPRO_BASE
 673         bool
 674         default n
 675
 676 config SCHED_SMT
 677         bool "SMT (Hyperthreading) scheduler support"
 678         depends on PPC64 && SMP
 679         help
 680           SMT scheduler support improves the CPU scheduler's decision making
 681           when dealing with POWER5 cpus at a cost of slightly increased
 682           overhead in some places. If unsure say N here.
 683
 684 config PPC_DENORMALISATION
 685         bool "PowerPC denormalisation exception handling"
 686         depends on PPC_BOOK3S_64
 687         default "y" if PPC_POWERNV
 688         ---help---
 689           Add support for handling denormalisation of single precision
 690           values.  Useful for bare metal only.  If unsure say Y here.
 691
 692 config CMDLINE_BOOL
 693         bool "Default bootloader kernel arguments"
 694
 695 config CMDLINE
 696         string "Initial kernel command string"
 697         depends on CMDLINE_BOOL
 698         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 699         help
 700           On some platforms, there is currently no way for the boot loader to
 701           pass arguments to the kernel. For these platforms, you can supply
 702           some command-line options at build time by entering them here.  In
 703           most cases you will need to specify the root device here.
 704
 705 config CMDLINE_FORCE
 706         bool "Always use the default kernel command string"
 707         depends on CMDLINE_BOOL
 708         help
 709           Always use the default kernel command string, even if the boot
 710           loader passes other arguments to the kernel.
 711           This is useful if you cannot or don't want to change the
 712           command-line options your boot loader passes to the kernel.
 713
 714 config EXTRA_TARGETS
 715         string "Additional default image types"
 716         help
 717           List additional targets to be built by the bootwrapper here (separated
 718           by spaces).  This is useful for targets that depend of device tree
 719           files in the .dts directory.
 720
 721           Targets in this list will be build as part of the default build
 722           target, or when the user does a 'make zImage' or a
 723           'make zImage.initrd'.
 724
 725           If unsure, leave blank
 726
 727 config ARCH_WANTS_FREEZER_CONTROL
 728         def_bool y
 729         depends on ADB_PMU
 730
 731 source kernel/power/Kconfig
 732
 733 config SECCOMP
 734         bool "Enable seccomp to safely compute untrusted bytecode"
 735         depends on PROC_FS
 736         default y
 737         help
 738           This kernel feature is useful for number crunching applications
 739           that may need to compute untrusted bytecode during their
 740           execution. By using pipes or other transports made available to
 741           the process as file descriptors supporting the read/write
 742           syscalls, it's possible to isolate those applications in
 743           their own address space using seccomp. Once seccomp is
 744           enabled via /proc/<pid>/seccomp, it cannot be disabled
 745           and the task is only allowed to execute a few safe syscalls
 746           defined by each seccomp mode.
 747
 748           If unsure, say Y. Only embedded should say N here.
 749
 750 endmenu
 751
 752 config ISA_DMA_API
 753         bool
 754         default PCI
 755
 756 menu "Bus options"
 757
 758 config ISA
 759         bool "Support for ISA-bus hardware"
 760         depends on PPC_CHRP
 761         select PPC_I8259
 762         help
 763           Find out whether you have ISA slots on your motherboard.  ISA is the
 764           name of a bus system, i.e. the way the CPU talks to the other stuff
 765           inside your box.  If you have an Apple machine, say N here; if you
 766           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 767           embedded board, consult your board documentation.
 768
 769 config ZONE_DMA
 770         bool
 771         default y
 772
 773 config NEED_DMA_MAP_STATE
 774         def_bool (PPC64 || NOT_COHERENT_CACHE)
 775
 776 config NEED_SG_DMA_LENGTH
 777         def_bool y
 778
 779 config GENERIC_ISA_DMA
 780         bool
 781         depends on ISA_DMA_API
 782         default y
 783
 784 config PPC_INDIRECT_PCI
 785         bool
 786         depends on PCI
 787         default y if 40x || 44x
 788         default n
 789
 790 config EISA
 791         bool
 792
 793 config SBUS
 794         bool
 795
 796 config FSL_SOC
 797         bool
 798
 799 config FSL_PCI
 800         bool
 801         select PPC_INDIRECT_PCI
 802         select PCI_QUIRKS
 803
 804 config FSL_PMC
 805         bool
 806         default y
 807         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 808         help
 809           Freescale MPC85xx/MPC86xx power management controller support
 810           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 811
 812 config PPC4xx_CPM
 813         bool
 814         default y
 815         depends on SUSPEND && (44x || 40x)
 816         help
 817           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 818           It also enables support for two different idle states (idle-wait
 819           and idle-doze).
 820
 821 config 4xx_SOC
 822         bool
 823
 824 config FSL_LBC
 825         bool "Freescale Local Bus support"
 826         help
 827           Enables reporting of errors from the Freescale local bus
 828           controller.  Also contains some common code used by
 829           drivers for specific local bus peripherals.
 830
 831 config FSL_GTM
 832         bool
 833         depends on PPC_83xx || QUICC_ENGINE || CPM2
 834         help
 835           Freescale General-purpose Timers support
 836
 837 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 838 config MCA
 839         bool
 840
 841 # Platforms that what PCI turned unconditionally just do select PCI
 842 # in their config node.  Platforms that want to choose at config
 843 # time should select PPC_PCI_CHOICE
 844 config PPC_PCI_CHOICE
 845         bool
 846
 847 config PCI
 848         bool "PCI support" if PPC_PCI_CHOICE
 849         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 850                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 851         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 852         select GENERIC_PCI_IOMAP
 853         help
 854           Find out whether your system includes a PCI bus. PCI is the name of
 855           a bus system, i.e. the way the CPU talks to the other stuff inside
 856           your box.  If you say Y here, the kernel will include drivers and
 857           infrastructure code to support PCI bus devices.
 858
 859 config PCI_DOMAINS
 860         def_bool PCI
 861
 862 config PCI_SYSCALL
 863         def_bool PCI
 864
 865 config PCI_QSPAN
 866         bool "QSpan PCI"
 867         depends on !4xx && !CPM2 && 8xx
 868         select PPC_I8259
 869         help
 870           Say Y here if you have a system based on a Motorola 8xx-series
 871           embedded processor with a QSPAN PCI interface, otherwise say N.
 872
 873 config PCI_8260
 874         bool
 875         depends on PCI && 8260
 876         select PPC_INDIRECT_PCI
 877         default y
 878
 879 source "drivers/pci/Kconfig"
 880
 881 source "drivers/pcmcia/Kconfig"
 882
 883 config HAS_RAPIDIO
 884         bool
 885         default n
 886
 887 config RAPIDIO
 888         tristate "RapidIO support"
 889         depends on HAS_RAPIDIO || PCI
 890         help
 891           If you say Y here, the kernel will include drivers and
 892           infrastructure code to support RapidIO interconnect devices.
 893
 894 config FSL_RIO
 895         bool "Freescale Embedded SRIO Controller support"
 896         depends on RAPIDIO = y && HAS_RAPIDIO
 897         default "n"
 898         ---help---
 899           Include support for RapidIO controller on Freescale embedded
 900           processors (MPC8548, MPC8641, etc).
 901
 902 source "drivers/rapidio/Kconfig"
 903
 904 endmenu
 905
 906 config NONSTATIC_KERNEL
 907         bool
 908         default n
 909
 910 menu "Advanced setup"
 911         depends on PPC32
 912
 913 config ADVANCED_OPTIONS
 914         bool "Prompt for advanced kernel configuration options"
 915         help
 916           This option will enable prompting for a variety of advanced kernel
 917           configuration options.  These options can cause the kernel to not
 918           work if they are set incorrectly, but can be used to optimize certain
 919           aspects of kernel memory management.
 920
 921           Unless you know what you are doing, say N here.
 922
 923 comment "Default settings for advanced configuration options are used"
 924         depends on !ADVANCED_OPTIONS
 925
 926 config LOWMEM_SIZE_BOOL
 927         bool "Set maximum low memory"
 928         depends on ADVANCED_OPTIONS
 929         help
 930           This option allows you to set the maximum amount of memory which
 931           will be used as "low memory", that is, memory which the kernel can
 932           access directly, without having to set up a kernel virtual mapping.
 933           This can be useful in optimizing the layout of kernel virtual
 934           memory.
 935
 936           Say N here unless you know what you are doing.
 937
 938 config LOWMEM_SIZE
 939         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 940         default "0x30000000"
 941
 942 config LOWMEM_CAM_NUM_BOOL
 943         bool "Set number of CAMs to use to map low memory"
 944         depends on ADVANCED_OPTIONS && FSL_BOOKE
 945         help
 946           This option allows you to set the maximum number of CAM slots that
 947           will be used to map low memory.  There are a limited number of slots
 948           available and even more limited number that will fit in the L1 MMU.
 949           However, using more entries will allow mapping more low memory.  This
 950           can be useful in optimizing the layout of kernel virtual memory.
 951
 952           Say N here unless you know what you are doing.
 953
 954 config LOWMEM_CAM_NUM
 955         depends on FSL_BOOKE
 956         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 957         default 3
 958
 959 config DYNAMIC_MEMSTART
 960         bool "Enable page aligned dynamic load address for kernel"
 961         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 962         select NONSTATIC_KERNEL
 963         help
 964           This option enables the kernel to be loaded at any page aligned
 965           physical address. The kernel creates a mapping from KERNELBASE to
 966           the address where the kernel is loaded. The page size here implies
 967           the TLB page size of the mapping for kernel on the particular platform.
 968           Please refer to the init code for finding the TLB page size.
 969
 970           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 971           kernel image, where the only restriction is the page aligned kernel
 972           load address. When this option is enabled, the compile time physical
 973           address CONFIG_PHYSICAL_START is ignored.
 974
 975           This option is overridden by CONFIG_RELOCATABLE
 976
 977 config PAGE_OFFSET_BOOL
 978         bool "Set custom page offset address"
 979         depends on ADVANCED_OPTIONS
 980         help
 981           This option allows you to set the kernel virtual address at which
 982           the kernel will map low memory.  This can be useful in optimizing
 983           the virtual memory layout of the system.
 984
 985           Say N here unless you know what you are doing.
 986
 987 config PAGE_OFFSET
 988         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 989         default "0xc0000000"
 990
 991 config KERNEL_START_BOOL
 992         bool "Set custom kernel base address"
 993         depends on ADVANCED_OPTIONS
 994         help
 995           This option allows you to set the kernel virtual address at which
 996           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 997           however there are times (like kdump) that one might not want them
 998           to be the same.
 999
1000           Say N here unless you know what you are doing.
1001
1002 config KERNEL_START
1003         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1004         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1005         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1006         default "0xc0000000"
1007
1008 config PHYSICAL_START_BOOL
1009         bool "Set physical address where the kernel is loaded"
1010         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1011         help
1012           This gives the physical address where the kernel is loaded.
1013
1014           Say N here unless you know what you are doing.
1015
1016 config PHYSICAL_START
1017         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1018         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1019         default "0x00000000"
1020
1021 config PHYSICAL_ALIGN
1022         hex
1023         default "0x04000000" if FSL_BOOKE
1024         help
1025           This value puts the alignment restrictions on physical address
1026           where kernel is loaded and run from. Kernel is compiled for an
1027           address which meets above alignment restriction.
1028
1029 config TASK_SIZE_BOOL
1030         bool "Set custom user task size"
1031         depends on ADVANCED_OPTIONS
1032         help
1033           This option allows you to set the amount of virtual address space
1034           allocated to user tasks.  This can be useful in optimizing the
1035           virtual memory layout of the system.
1036
1037           Say N here unless you know what you are doing.
1038
1039 config TASK_SIZE
1040         hex "Size of user task space" if TASK_SIZE_BOOL
1041         default "0x80000000" if PPC_8xx
1042         default "0xc0000000"
1043
1044 config CONSISTENT_SIZE_BOOL
1045         bool "Set custom consistent memory pool size"
1046         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1047         help
1048           This option allows you to set the size of the
1049           consistent memory pool.  This pool of virtual memory
1050           is used to make consistent memory allocations.
1051
1052 config CONSISTENT_SIZE
1053         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1054         default "0x00200000" if NOT_COHERENT_CACHE
1055
1056 config PIN_TLB
1057         bool "Pinned Kernel TLBs (860 ONLY)"
1058         depends on ADVANCED_OPTIONS && 8xx
1059
1060 config PIN_TLB_IMMR
1061         bool "Pinned TLB for IMMR"
1062         depends on PIN_TLB
1063         default y
1064 endmenu
1065
1066 if PPC64
1067 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1068 config PAGE_OFFSET
1069         hex
1070         default "0xc000000000000000"
1071 config KERNEL_START
1072         hex
1073         default "0xc000000000000000"
1074 config PHYSICAL_START
1075         hex
1076         default "0x00000000"
1077 endif
1078
1079 config  ARCH_RANDOM
1080         def_bool n
1081
1082 source "net/Kconfig"
1083
1084 source "drivers/Kconfig"
1085
1086 source "fs/Kconfig"
1087
1088 source "lib/Kconfig"
1089
1090 source "arch/powerpc/Kconfig.debug"
1091
1092 source "security/Kconfig"
1093
1094 config KEYS_COMPAT
1095         bool
1096         depends on COMPAT && KEYS
1097         default y
1098
1099 source "crypto/Kconfig"
1100
1101 config PPC_LIB_RHEAP
1102         bool
1103
1104 source "arch/powerpc/kvm/Kconfig"
1105
1106 source "kernel/livepatch/Kconfig"