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 ARCH_WANT_OPTIONAL_GPIOLIB
 102         select VIRT_TO_BUS if !PPC64
 103         select HAVE_IDE
 104         select HAVE_IOREMAP_PROT
 105         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
 106         select HAVE_KPROBES
 107         select HAVE_ARCH_KGDB
 108         select HAVE_KRETPROBES
 109         select HAVE_ARCH_TRACEHOOK
 110         select HAVE_MEMBLOCK
 111         select HAVE_MEMBLOCK_NODE_MAP
 112         select HAVE_DMA_API_DEBUG
 113         select HAVE_OPROFILE
 114         select HAVE_DEBUG_KMEMLEAK
 115         select ARCH_HAS_SG_CHAIN
 116         select GENERIC_ATOMIC64 if PPC32
 117         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 118         select HAVE_PERF_EVENTS
 119         select HAVE_PERF_REGS
 120         select HAVE_PERF_USER_STACK_DUMP
 121         select HAVE_REGS_AND_STACK_ACCESS_API
 122         select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
 123         select ARCH_WANT_IPC_PARSE_VERSION
 124         select SPARSE_IRQ
 125         select IRQ_DOMAIN
 126         select GENERIC_IRQ_SHOW
 127         select GENERIC_IRQ_SHOW_LEVEL
 128         select IRQ_FORCED_THREADING
 129         select HAVE_RCU_TABLE_FREE if SMP
 130         select HAVE_SYSCALL_TRACEPOINTS
 131         select HAVE_BPF_JIT
 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 EDAC_SUPPORT
 159         select EDAC_ATOMIC_SCRUB
 160         select ARCH_HAS_DMA_SET_COHERENT_MASK
 161         select ARCH_HAS_DEVMEM_IS_ALLOWED
 162         select HAVE_ARCH_SECCOMP_FILTER
 163         select ARCH_HAS_UBSAN_SANITIZE_ALL
 164         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 165         select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
 166
 167 config GENERIC_CSUM
 168         def_bool CPU_LITTLE_ENDIAN
 169
 170 config EARLY_PRINTK
 171         bool
 172         default y
 173
 174 config PANIC_TIMEOUT
 175         int
 176         default 180
 177
 178 config COMPAT
 179         bool
 180         default y if PPC64
 181         select COMPAT_BINFMT_ELF
 182         select ARCH_WANT_OLD_COMPAT_IPC
 183         select COMPAT_OLD_SIGACTION
 184
 185 config SYSVIPC_COMPAT
 186         bool
 187         depends on COMPAT && SYSVIPC
 188         default y
 189
 190 # All PPC32s use generic nvram driver through ppc_md
 191 config GENERIC_NVRAM
 192         bool
 193         default y if PPC32
 194
 195 config SCHED_OMIT_FRAME_POINTER
 196         bool
 197         default y
 198
 199 config ARCH_MAY_HAVE_PC_FDC
 200         bool
 201         default PCI
 202
 203 config PPC_UDBG_16550
 204         bool
 205         default n
 206
 207 config GENERIC_TBSYNC
 208         bool
 209         default y if PPC32 && SMP
 210         default n
 211
 212 config AUDIT_ARCH
 213         bool
 214         default y
 215
 216 config GENERIC_BUG
 217         bool
 218         default y
 219         depends on BUG
 220
 221 config SYS_SUPPORTS_APM_EMULATION
 222         default y if PMAC_APM_EMU
 223         bool
 224
 225 config EPAPR_BOOT
 226         bool
 227         help
 228           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 229         default n
 230
 231 config DEFAULT_UIMAGE
 232         bool
 233         help
 234           Used to allow a board to specify it wants a uImage built by default
 235         default n
 236
 237 config ARCH_HIBERNATION_POSSIBLE
 238         bool
 239         default y
 240
 241 config ARCH_SUSPEND_POSSIBLE
 242         def_bool y
 243         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 244                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 245                    || 44x || 40x
 246
 247 config PPC_DCR_NATIVE
 248         bool
 249         default n
 250
 251 config PPC_DCR_MMIO
 252         bool
 253         default n
 254
 255 config PPC_DCR
 256         bool
 257         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 258         default y
 259
 260 config PPC_OF_PLATFORM_PCI
 261         bool
 262         depends on PCI
 263         depends on PPC64 # not supported on 32 bits yet
 264         default n
 265
 266 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 267         depends on PPC32 || PPC_STD_MMU_64
 268         def_bool y
 269
 270 config ARCH_SUPPORTS_UPROBES
 271         def_bool y
 272
 273 config PPC_ADV_DEBUG_REGS
 274         bool
 275         depends on 40x || BOOKE
 276         default y
 277
 278 config PPC_ADV_DEBUG_IACS
 279         int
 280         depends on PPC_ADV_DEBUG_REGS
 281         default 4 if 44x
 282         default 2
 283
 284 config PPC_ADV_DEBUG_DACS
 285         int
 286         depends on PPC_ADV_DEBUG_REGS
 287         default 2
 288
 289 config PPC_ADV_DEBUG_DVCS
 290         int
 291         depends on PPC_ADV_DEBUG_REGS
 292         default 2 if 44x
 293         default 0
 294
 295 config PPC_ADV_DEBUG_DAC_RANGE
 296         bool
 297         depends on PPC_ADV_DEBUG_REGS && 44x
 298         default y
 299
 300 config PPC_EMULATE_SSTEP
 301         bool
 302         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 303
 304 config ZONE_DMA32
 305         bool
 306         default y if PPC64
 307
 308 config PGTABLE_LEVELS
 309         int
 310         default 2 if !PPC64
 311         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 312         default 4
 313
 314 source "init/Kconfig"
 315
 316 source "kernel/Kconfig.freezer"
 317
 318 source "arch/powerpc/sysdev/Kconfig"
 319 source "arch/powerpc/platforms/Kconfig"
 320
 321 menu "Kernel options"
 322
 323 config HIGHMEM
 324         bool "High memory support"
 325         depends on PPC32
 326
 327 source kernel/Kconfig.hz
 328 source kernel/Kconfig.preempt
 329 source "fs/Kconfig.binfmt"
 330
 331 config HUGETLB_PAGE_SIZE_VARIABLE
 332         bool
 333         depends on HUGETLB_PAGE
 334         default y
 335
 336 config MATH_EMULATION
 337         bool "Math emulation"
 338         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 339         ---help---
 340           Some PowerPC chips designed for embedded applications do not have
 341           a floating-point unit and therefore do not implement the
 342           floating-point instructions in the PowerPC instruction set.  If you
 343           say Y here, the kernel will include code to emulate a floating-point
 344           unit, which will allow programs that use floating-point
 345           instructions to run.
 346
 347           This is also useful to emulate missing (optional) instructions
 348           such as fsqrt on cores that do have an FPU but do not implement
 349           them (such as Freescale BookE).
 350
 351 choice
 352         prompt "Math emulation options"
 353         default MATH_EMULATION_FULL
 354         depends on MATH_EMULATION
 355
 356 config  MATH_EMULATION_FULL
 357         bool "Emulate all the floating point instructions"
 358         ---help---
 359           Select this option will enable the kernel to support to emulate
 360           all the floating point instructions. If your SoC doesn't have
 361           a FPU, you should select this.
 362
 363 config MATH_EMULATION_HW_UNIMPLEMENTED
 364         bool "Just emulate the FPU unimplemented instructions"
 365         ---help---
 366           Select this if you know there does have a hardware FPU on your
 367           SoC, but some floating point instructions are not implemented by that.
 368
 369 endchoice
 370
 371 config PPC_TRANSACTIONAL_MEM
 372        bool "Transactional Memory support for POWERPC"
 373        depends on PPC_BOOK3S_64
 374        depends on SMP
 375        select ALTIVEC
 376        select VSX
 377        default n
 378        ---help---
 379          Support user-mode Transactional Memory on POWERPC.
 380
 381 config DISABLE_MPROFILE_KERNEL
 382         bool "Disable use of mprofile-kernel for kernel tracing"
 383         depends on PPC64 && CPU_LITTLE_ENDIAN
 384         default y
 385         help
 386           Selecting this options disables use of the mprofile-kernel ABI for
 387           kernel tracing. That will cause options such as live patching
 388           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 389           be disabled also.
 390
 391           If you have a toolchain which supports mprofile-kernel, then you can
 392           enable this. Otherwise leave it disabled. If you're not sure, say
 393           "N".
 394
 395 config MPROFILE_KERNEL
 396         depends on PPC64 && CPU_LITTLE_ENDIAN
 397         def_bool !DISABLE_MPROFILE_KERNEL
 398
 399 config IOMMU_HELPER
 400         def_bool PPC64
 401
 402 config SWIOTLB
 403         bool "SWIOTLB support"
 404         default n
 405         select IOMMU_HELPER
 406         ---help---
 407           Support for IO bounce buffering for systems without an IOMMU.
 408           This allows us to DMA to the full physical address space on
 409           platforms where the size of a physical address is larger
 410           than the bus address.  Not all platforms support this.
 411
 412 config HOTPLUG_CPU
 413         bool "Support for enabling/disabling CPUs"
 414         depends on SMP && (PPC_PSERIES || \
 415         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 416         ---help---
 417           Say Y here to be able to disable and re-enable individual
 418           CPUs at runtime on SMP machines.
 419
 420           Say N if you are unsure.
 421
 422 config ARCH_CPU_PROBE_RELEASE
 423         def_bool y
 424         depends on HOTPLUG_CPU
 425
 426 config ARCH_ENABLE_MEMORY_HOTPLUG
 427         def_bool y
 428
 429 config ARCH_HAS_WALK_MEMORY
 430         def_bool y
 431
 432 config ARCH_ENABLE_MEMORY_HOTREMOVE
 433         def_bool y
 434
 435 config PPC64_SUPPORTS_MEMORY_FAILURE
 436         bool "Add support for memory hwpoison"
 437         depends on PPC_BOOK3S_64
 438         default "y" if PPC_POWERNV
 439         select ARCH_SUPPORTS_MEMORY_FAILURE
 440
 441 config KEXEC
 442         bool "kexec system call"
 443         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 444         select KEXEC_CORE
 445         help
 446           kexec is a system call that implements the ability to shutdown your
 447           current kernel, and to start another kernel.  It is like a reboot
 448           but it is independent of the system firmware.   And like a reboot
 449           you can start any kernel with it, not just Linux.
 450
 451           The name comes from the similarity to the exec system call.
 452
 453           It is an ongoing process to be certain the hardware in a machine
 454           is properly shutdown, so do not be surprised if this code does not
 455           initially work for you.  As of this writing the exact hardware
 456           interface is strongly in flux, so no good recommendation can be
 457           made.
 458
 459 config CRASH_DUMP
 460         bool "Build a kdump crash kernel"
 461         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 462         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 463         help
 464           Build a kernel suitable for use as a kdump capture kernel.
 465           The same kernel binary can be used as production kernel and dump
 466           capture kernel.
 467
 468 config FA_DUMP
 469         bool "Firmware-assisted dump"
 470         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
 471         help
 472           A robust mechanism to get reliable kernel crash dump with
 473           assistance from firmware. This approach does not use kexec,
 474           instead firmware assists in booting the kdump kernel
 475           while preserving memory contents. Firmware-assisted dump
 476           is meant to be a kdump replacement offering robustness and
 477           speed not possible without system firmware assistance.
 478
 479           If unsure, say "N"
 480
 481 config IRQ_ALL_CPUS
 482         bool "Distribute interrupts on all CPUs by default"
 483         depends on SMP
 484         help
 485           This option gives the kernel permission to distribute IRQs across
 486           multiple CPUs.  Saying N here will route all IRQs to the first
 487           CPU.  Generally saying Y is safe, although some problems have been
 488           reported with SMP Power Macintoshes with this option enabled.
 489
 490 config NUMA
 491         bool "NUMA support"
 492         depends on PPC64
 493         default y if SMP && PPC_PSERIES
 494
 495 config NODES_SHIFT
 496         int
 497         default "8" if PPC64
 498         default "4"
 499         depends on NEED_MULTIPLE_NODES
 500
 501 config USE_PERCPU_NUMA_NODE_ID
 502         def_bool y
 503         depends on NUMA
 504
 505 config HAVE_MEMORYLESS_NODES
 506         def_bool y
 507         depends on NUMA
 508
 509 config ARCH_SELECT_MEMORY_MODEL
 510         def_bool y
 511         depends on PPC64
 512
 513 config ARCH_FLATMEM_ENABLE
 514         def_bool y
 515         depends on (PPC64 && !NUMA) || PPC32
 516
 517 config ARCH_SPARSEMEM_ENABLE
 518         def_bool y
 519         depends on PPC64
 520         select SPARSEMEM_VMEMMAP_ENABLE
 521
 522 config ARCH_SPARSEMEM_DEFAULT
 523         def_bool y
 524         depends on (SMP && PPC_PSERIES) || PPC_PS3
 525
 526 config SYS_SUPPORTS_HUGETLBFS
 527         bool
 528
 529 source "mm/Kconfig"
 530
 531 config ARCH_MEMORY_PROBE
 532         def_bool y
 533         depends on MEMORY_HOTPLUG
 534
 535 # Some NUMA nodes have memory ranges that span
 536 # other nodes.  Even though a pfn is valid and
 537 # between a node's start and end pfns, it may not
 538 # reside on that node.  See memmap_init_zone()
 539 # for details.
 540 config NODES_SPAN_OTHER_NODES
 541         def_bool y
 542         depends on NEED_MULTIPLE_NODES
 543
 544 config STDBINUTILS
 545         bool "Using standard binutils settings"
 546         depends on 44x
 547         default y
 548         help
 549           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 550           Note, that kernel will be able to run only those applications,
 551           which had been compiled using binutils later than 2.17.50.0.3 with
 552           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 553           the older binutils, you can patch them with a trivial patch, which
 554           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 555
 556 choice
 557         prompt "Page size"
 558         default PPC_4K_PAGES
 559         help
 560           Select the kernel logical page size. Increasing the page size
 561           will reduce software overhead at each page boundary, allow
 562           hardware prefetch mechanisms to be more effective, and allow
 563           larger dma transfers increasing IO efficiency and reducing
 564           overhead. However the utilization of memory will increase.
 565           For example, each cached file will using a multiple of the
 566           page size to hold its contents and the difference between the
 567           end of file and the end of page is wasted.
 568
 569           Some dedicated systems, such as software raid serving with
 570           accelerated calculations, have shown significant increases.
 571
 572           If you configure a 64 bit kernel for 64k pages but the
 573           processor does not support them, then the kernel will simulate
 574           them with 4k pages, loading them on demand, but with the
 575           reduced software overhead and larger internal fragmentation.
 576           For the 32 bit kernel, a large page option will not be offered
 577           unless it is supported by the configured processor.
 578
 579           If unsure, choose 4K_PAGES.
 580
 581 config PPC_4K_PAGES
 582         bool "4k page size"
 583         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 584
 585 config PPC_16K_PAGES
 586         bool "16k page size"
 587         depends on 44x || PPC_8xx
 588
 589 config PPC_64K_PAGES
 590         bool "64k page size"
 591         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 592         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 593
 594 config PPC_256K_PAGES
 595         bool "256k page size"
 596         depends on 44x && !STDBINUTILS
 597         help
 598           Make the page size 256k.
 599
 600           As the ELF standard only requires alignment to support page
 601           sizes up to 64k, you will need to compile all of your user
 602           space applications with a non-standard binutils settings
 603           (see the STDBINUTILS description for details).
 604
 605           Say N unless you know what you are doing.
 606
 607 endchoice
 608
 609 config FORCE_MAX_ZONEORDER
 610         int "Maximum zone order"
 611         range 8 9 if PPC64 && PPC_64K_PAGES
 612         default "9" if PPC64 && PPC_64K_PAGES
 613         range 9 13 if PPC64 && !PPC_64K_PAGES
 614         default "13" if PPC64 && !PPC_64K_PAGES
 615         range 9 64 if PPC32 && PPC_16K_PAGES
 616         default "9" if PPC32 && PPC_16K_PAGES
 617         range 7 64 if PPC32 && PPC_64K_PAGES
 618         default "7" if PPC32 && PPC_64K_PAGES
 619         range 5 64 if PPC32 && PPC_256K_PAGES
 620         default "5" if PPC32 && PPC_256K_PAGES
 621         range 11 64
 622         default "11"
 623         help
 624           The kernel memory allocator divides physically contiguous memory
 625           blocks into "zones", where each zone is a power of two number of
 626           pages.  This option selects the largest power of two that the kernel
 627           keeps in the memory allocator.  If you need to allocate very large
 628           blocks of physically contiguous memory, then you may need to
 629           increase this value.
 630
 631           This config option is actually maximum order plus one. For example,
 632           a value of 11 means that the largest free memory block is 2^10 pages.
 633
 634           The page size is not necessarily 4KB.  For example, on 64-bit
 635           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 636           this in mind when choosing a value for this option.
 637
 638 config PPC_SUBPAGE_PROT
 639         bool "Support setting protections for 4k subpages"
 640         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 641         help
 642           This option adds support for a system call to allow user programs
 643           to set access permissions (read/write, readonly, or no access)
 644           on the 4k subpages of each 64k page.
 645
 646 config PPC_COPRO_BASE
 647         bool
 648         default n
 649
 650 config SCHED_SMT
 651         bool "SMT (Hyperthreading) scheduler support"
 652         depends on PPC64 && SMP
 653         help
 654           SMT scheduler support improves the CPU scheduler's decision making
 655           when dealing with POWER5 cpus at a cost of slightly increased
 656           overhead in some places. If unsure say N here.
 657
 658 config PPC_DENORMALISATION
 659         bool "PowerPC denormalisation exception handling"
 660         depends on PPC_BOOK3S_64
 661         default "y" if PPC_POWERNV
 662         ---help---
 663           Add support for handling denormalisation of single precision
 664           values.  Useful for bare metal only.  If unsure say Y here.
 665
 666 config CMDLINE_BOOL
 667         bool "Default bootloader kernel arguments"
 668
 669 config CMDLINE
 670         string "Initial kernel command string"
 671         depends on CMDLINE_BOOL
 672         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 673         help
 674           On some platforms, there is currently no way for the boot loader to
 675           pass arguments to the kernel. For these platforms, you can supply
 676           some command-line options at build time by entering them here.  In
 677           most cases you will need to specify the root device here.
 678
 679 config CMDLINE_FORCE
 680         bool "Always use the default kernel command string"
 681         depends on CMDLINE_BOOL
 682         help
 683           Always use the default kernel command string, even if the boot
 684           loader passes other arguments to the kernel.
 685           This is useful if you cannot or don't want to change the
 686           command-line options your boot loader passes to the kernel.
 687
 688 config EXTRA_TARGETS
 689         string "Additional default image types"
 690         help
 691           List additional targets to be built by the bootwrapper here (separated
 692           by spaces).  This is useful for targets that depend of device tree
 693           files in the .dts directory.
 694
 695           Targets in this list will be build as part of the default build
 696           target, or when the user does a 'make zImage' or a
 697           'make zImage.initrd'.
 698
 699           If unsure, leave blank
 700
 701 config ARCH_WANTS_FREEZER_CONTROL
 702         def_bool y
 703         depends on ADB_PMU
 704
 705 source kernel/power/Kconfig
 706
 707 config SECCOMP
 708         bool "Enable seccomp to safely compute untrusted bytecode"
 709         depends on PROC_FS
 710         default y
 711         help
 712           This kernel feature is useful for number crunching applications
 713           that may need to compute untrusted bytecode during their
 714           execution. By using pipes or other transports made available to
 715           the process as file descriptors supporting the read/write
 716           syscalls, it's possible to isolate those applications in
 717           their own address space using seccomp. Once seccomp is
 718           enabled via /proc/<pid>/seccomp, it cannot be disabled
 719           and the task is only allowed to execute a few safe syscalls
 720           defined by each seccomp mode.
 721
 722           If unsure, say Y. Only embedded should say N here.
 723
 724 endmenu
 725
 726 config ISA_DMA_API
 727         bool
 728         default PCI
 729
 730 menu "Bus options"
 731
 732 config ISA
 733         bool "Support for ISA-bus hardware"
 734         depends on PPC_CHRP
 735         select PPC_I8259
 736         help
 737           Find out whether you have ISA slots on your motherboard.  ISA is the
 738           name of a bus system, i.e. the way the CPU talks to the other stuff
 739           inside your box.  If you have an Apple machine, say N here; if you
 740           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 741           embedded board, consult your board documentation.
 742
 743 config ZONE_DMA
 744         bool
 745         default y
 746
 747 config NEED_DMA_MAP_STATE
 748         def_bool (PPC64 || NOT_COHERENT_CACHE)
 749
 750 config NEED_SG_DMA_LENGTH
 751         def_bool y
 752
 753 config GENERIC_ISA_DMA
 754         bool
 755         depends on ISA_DMA_API
 756         default y
 757
 758 config PPC_INDIRECT_PCI
 759         bool
 760         depends on PCI
 761         default y if 40x || 44x
 762         default n
 763
 764 config EISA
 765         bool
 766
 767 config SBUS
 768         bool
 769
 770 config FSL_SOC
 771         bool
 772
 773 config FSL_PCI
 774         bool
 775         select PPC_INDIRECT_PCI
 776         select PCI_QUIRKS
 777
 778 config FSL_PMC
 779         bool
 780         default y
 781         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 782         help
 783           Freescale MPC85xx/MPC86xx power management controller support
 784           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 785
 786 config PPC4xx_CPM
 787         bool
 788         default y
 789         depends on SUSPEND && (44x || 40x)
 790         help
 791           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 792           It also enables support for two different idle states (idle-wait
 793           and idle-doze).
 794
 795 config 4xx_SOC
 796         bool
 797
 798 config FSL_LBC
 799         bool "Freescale Local Bus support"
 800         depends on FSL_SOC
 801         help
 802           Enables reporting of errors from the Freescale local bus
 803           controller.  Also contains some common code used by
 804           drivers for specific local bus peripherals.
 805
 806 config FSL_GTM
 807         bool
 808         depends on PPC_83xx || QUICC_ENGINE || CPM2
 809         help
 810           Freescale General-purpose Timers support
 811
 812 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 813 config MCA
 814         bool
 815
 816 # Platforms that what PCI turned unconditionally just do select PCI
 817 # in their config node.  Platforms that want to choose at config
 818 # time should select PPC_PCI_CHOICE
 819 config PPC_PCI_CHOICE
 820         bool
 821
 822 config PCI
 823         bool "PCI support" if PPC_PCI_CHOICE
 824         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 825                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 826         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 827         select GENERIC_PCI_IOMAP
 828         help
 829           Find out whether your system includes a PCI bus. PCI is the name of
 830           a bus system, i.e. the way the CPU talks to the other stuff inside
 831           your box.  If you say Y here, the kernel will include drivers and
 832           infrastructure code to support PCI bus devices.
 833
 834 config PCI_DOMAINS
 835         def_bool PCI
 836
 837 config PCI_SYSCALL
 838         def_bool PCI
 839
 840 config PCI_QSPAN
 841         bool "QSpan PCI"
 842         depends on !4xx && !CPM2 && 8xx
 843         select PPC_I8259
 844         help
 845           Say Y here if you have a system based on a Motorola 8xx-series
 846           embedded processor with a QSPAN PCI interface, otherwise say N.
 847
 848 config PCI_8260
 849         bool
 850         depends on PCI && 8260
 851         select PPC_INDIRECT_PCI
 852         default y
 853
 854 source "drivers/pci/Kconfig"
 855
 856 source "drivers/pcmcia/Kconfig"
 857
 858 config HAS_RAPIDIO
 859         bool
 860         default n
 861
 862 config RAPIDIO
 863         tristate "RapidIO support"
 864         depends on HAS_RAPIDIO || PCI
 865         help
 866           If you say Y here, the kernel will include drivers and
 867           infrastructure code to support RapidIO interconnect devices.
 868
 869 config FSL_RIO
 870         bool "Freescale Embedded SRIO Controller support"
 871         depends on RAPIDIO = y && HAS_RAPIDIO
 872         default "n"
 873         ---help---
 874           Include support for RapidIO controller on Freescale embedded
 875           processors (MPC8548, MPC8641, etc).
 876
 877 source "drivers/rapidio/Kconfig"
 878
 879 endmenu
 880
 881 config NONSTATIC_KERNEL
 882         bool
 883         default n
 884
 885 menu "Advanced setup"
 886         depends on PPC32
 887
 888 config ADVANCED_OPTIONS
 889         bool "Prompt for advanced kernel configuration options"
 890         help
 891           This option will enable prompting for a variety of advanced kernel
 892           configuration options.  These options can cause the kernel to not
 893           work if they are set incorrectly, but can be used to optimize certain
 894           aspects of kernel memory management.
 895
 896           Unless you know what you are doing, say N here.
 897
 898 comment "Default settings for advanced configuration options are used"
 899         depends on !ADVANCED_OPTIONS
 900
 901 config LOWMEM_SIZE_BOOL
 902         bool "Set maximum low memory"
 903         depends on ADVANCED_OPTIONS
 904         help
 905           This option allows you to set the maximum amount of memory which
 906           will be used as "low memory", that is, memory which the kernel can
 907           access directly, without having to set up a kernel virtual mapping.
 908           This can be useful in optimizing the layout of kernel virtual
 909           memory.
 910
 911           Say N here unless you know what you are doing.
 912
 913 config LOWMEM_SIZE
 914         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 915         default "0x30000000"
 916
 917 config LOWMEM_CAM_NUM_BOOL
 918         bool "Set number of CAMs to use to map low memory"
 919         depends on ADVANCED_OPTIONS && FSL_BOOKE
 920         help
 921           This option allows you to set the maximum number of CAM slots that
 922           will be used to map low memory.  There are a limited number of slots
 923           available and even more limited number that will fit in the L1 MMU.
 924           However, using more entries will allow mapping more low memory.  This
 925           can be useful in optimizing the layout of kernel virtual memory.
 926
 927           Say N here unless you know what you are doing.
 928
 929 config LOWMEM_CAM_NUM
 930         depends on FSL_BOOKE
 931         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 932         default 3
 933
 934 config DYNAMIC_MEMSTART
 935         bool "Enable page aligned dynamic load address for kernel"
 936         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
 937         select NONSTATIC_KERNEL
 938         help
 939           This option enables the kernel to be loaded at any page aligned
 940           physical address. The kernel creates a mapping from KERNELBASE to
 941           the address where the kernel is loaded. The page size here implies
 942           the TLB page size of the mapping for kernel on the particular platform.
 943           Please refer to the init code for finding the TLB page size.
 944
 945           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
 946           kernel image, where the only restriction is the page aligned kernel
 947           load address. When this option is enabled, the compile time physical
 948           address CONFIG_PHYSICAL_START is ignored.
 949
 950           This option is overridden by CONFIG_RELOCATABLE
 951
 952 config RELOCATABLE
 953         bool "Build a relocatable kernel"
 954         depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
 955         select NONSTATIC_KERNEL
 956         help
 957           This builds a kernel image that is capable of running at the
 958           location the kernel is loaded at, without any alignment restrictions.
 959           This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
 960
 961           One use is for the kexec on panic case where the recovery kernel
 962           must live at a different physical address than the primary
 963           kernel.
 964
 965           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 966           it has been loaded at and the compile time physical addresses
 967           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 968           setting can still be useful to bootwrappers that need to know the
 969           load address of the kernel (eg. u-boot/mkimage).
 970
 971 config RELOCATABLE_PPC32
 972         def_bool y
 973         depends on PPC32 && RELOCATABLE
 974
 975 config PAGE_OFFSET_BOOL
 976         bool "Set custom page offset address"
 977         depends on ADVANCED_OPTIONS
 978         help
 979           This option allows you to set the kernel virtual address at which
 980           the kernel will map low memory.  This can be useful in optimizing
 981           the virtual memory layout of the system.
 982
 983           Say N here unless you know what you are doing.
 984
 985 config PAGE_OFFSET
 986         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
 987         default "0xc0000000"
 988
 989 config KERNEL_START_BOOL
 990         bool "Set custom kernel base address"
 991         depends on ADVANCED_OPTIONS
 992         help
 993           This option allows you to set the kernel virtual address at which
 994           the kernel will be loaded.  Normally this should match PAGE_OFFSET
 995           however there are times (like kdump) that one might not want them
 996           to be the same.
 997
 998           Say N here unless you know what you are doing.
 999
1000 config KERNEL_START
1001         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1002         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1003         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1004         default "0xc0000000"
1005
1006 config PHYSICAL_START_BOOL
1007         bool "Set physical address where the kernel is loaded"
1008         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1009         help
1010           This gives the physical address where the kernel is loaded.
1011
1012           Say N here unless you know what you are doing.
1013
1014 config PHYSICAL_START
1015         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1016         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1017         default "0x00000000"
1018
1019 config PHYSICAL_ALIGN
1020         hex
1021         default "0x04000000" if FSL_BOOKE
1022         help
1023           This value puts the alignment restrictions on physical address
1024           where kernel is loaded and run from. Kernel is compiled for an
1025           address which meets above alignment restriction.
1026
1027 config TASK_SIZE_BOOL
1028         bool "Set custom user task size"
1029         depends on ADVANCED_OPTIONS
1030         help
1031           This option allows you to set the amount of virtual address space
1032           allocated to user tasks.  This can be useful in optimizing the
1033           virtual memory layout of the system.
1034
1035           Say N here unless you know what you are doing.
1036
1037 config TASK_SIZE
1038         hex "Size of user task space" if TASK_SIZE_BOOL
1039         default "0x80000000" if PPC_8xx
1040         default "0xc0000000"
1041
1042 config CONSISTENT_SIZE_BOOL
1043         bool "Set custom consistent memory pool size"
1044         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1045         help
1046           This option allows you to set the size of the
1047           consistent memory pool.  This pool of virtual memory
1048           is used to make consistent memory allocations.
1049
1050 config CONSISTENT_SIZE
1051         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1052         default "0x00200000" if NOT_COHERENT_CACHE
1053
1054 config PIN_TLB
1055         bool "Pinned Kernel TLBs (860 ONLY)"
1056         depends on ADVANCED_OPTIONS && 8xx
1057 endmenu
1058
1059 if PPC64
1060 config RELOCATABLE
1061         bool "Build a relocatable kernel"
1062         depends on !COMPILE_TEST
1063         select NONSTATIC_KERNEL
1064         help
1065           This builds a kernel image that is capable of running anywhere
1066           in the RMA (real memory area) at any 16k-aligned base address.
1067           The kernel is linked as a position-independent executable (PIE)
1068           and contains dynamic relocations which are processed early
1069           in the bootup process.
1070
1071           One use is for the kexec on panic case where the recovery kernel
1072           must live at a different physical address than the primary
1073           kernel.
1074
1075 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1076 config PAGE_OFFSET
1077         hex
1078         default "0xc000000000000000"
1079 config KERNEL_START
1080         hex
1081         default "0xc000000000000000"
1082 config PHYSICAL_START
1083         hex
1084         default "0x00000000"
1085 endif
1086
1087 config  ARCH_RANDOM
1088         def_bool n
1089
1090 source "net/Kconfig"
1091
1092 source "drivers/Kconfig"
1093
1094 source "fs/Kconfig"
1095
1096 source "lib/Kconfig"
1097
1098 source "arch/powerpc/Kconfig.debug"
1099
1100 source "security/Kconfig"
1101
1102 config KEYS_COMPAT
1103         bool
1104         depends on COMPAT && KEYS
1105         default y
1106
1107 source "crypto/Kconfig"
1108
1109 config PPC_LIB_RHEAP
1110         bool
1111
1112 source "arch/powerpc/kvm/Kconfig"
1113
1114 source "kernel/livepatch/Kconfig"