arch/powerpc/Kconfig

   1 source "arch/powerpc/platforms/Kconfig.cputype"
   2
   3 config PPC32
   4         bool
   5         default y if !PPC64
   6
   7 config 32BIT
   8         bool
   9         default y if PPC32
  10
  11 config 64BIT
  12         bool
  13         default y if PPC64
  14
  15 config ARCH_PHYS_ADDR_T_64BIT
  16        def_bool PPC64 || PHYS_64BIT
  17
  18 config ARCH_DMA_ADDR_T_64BIT
  19         def_bool ARCH_PHYS_ADDR_T_64BIT
  20
  21 config MMU
  22         bool
  23         default y
  24
  25 config HAVE_SETUP_PER_CPU_AREA
  26         def_bool PPC64
  27
  28 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  29         def_bool PPC64
  30
  31 config NR_IRQS
  32         int "Number of virtual interrupt numbers"
  33         range 32 32768
  34         default "512"
  35         help
  36           This defines the number of virtual interrupt numbers the kernel
  37           can manage. Virtual interrupt numbers are what you see in
  38           /proc/interrupts. If you configure your system to have too few,
  39           drivers will fail to load or worse - handle with care.
  40
  41 config STACKTRACE_SUPPORT
  42         bool
  43         default y
  44
  45 config TRACE_IRQFLAGS_SUPPORT
  46         bool
  47         default y
  48
  49 config LOCKDEP_SUPPORT
  50         bool
  51         default y
  52
  53 config RWSEM_GENERIC_SPINLOCK
  54         bool
  55
  56 config RWSEM_XCHGADD_ALGORITHM
  57         bool
  58         default y
  59
  60 config GENERIC_LOCKBREAK
  61         bool
  62         default y
  63         depends on SMP && PREEMPT
  64
  65 config ARCH_HAS_ILOG2_U32
  66         bool
  67         default y
  68
  69 config ARCH_HAS_ILOG2_U64
  70         bool
  71         default y if 64BIT
  72
  73 config GENERIC_HWEIGHT
  74         bool
  75         default y
  76
  77 config ARCH_HAS_DMA_SET_COHERENT_MASK
  78         bool
  79
  80 config PPC
  81         bool
  82         default y
  83         select BUILDTIME_EXTABLE_SORT
  84         select ARCH_MIGHT_HAVE_PC_PARPORT
  85         select ARCH_MIGHT_HAVE_PC_SERIO
  86         select BINFMT_ELF
  87         select ARCH_HAS_ELF_RANDOMIZE
  88         select OF
  89         select OF_EARLY_FLATTREE
  90         select OF_RESERVED_MEM
  91         select HAVE_FTRACE_MCOUNT_RECORD
  92         select HAVE_DYNAMIC_FTRACE
  93         select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
  94         select HAVE_FUNCTION_TRACER
  95         select HAVE_FUNCTION_GRAPH_TRACER
  96         select HAVE_GCC_PLUGINS
  97         select SYSCTL_EXCEPTION_TRACE
  98         select VIRT_TO_BUS if !PPC64
  99         select HAVE_IDE
 100         select HAVE_IOREMAP_PROT
 101         select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
 102         select HAVE_KPROBES
 103         select HAVE_OPTPROBES if PPC64
 104         select HAVE_ARCH_KGDB
 105         select HAVE_KRETPROBES
 106         select HAVE_ARCH_TRACEHOOK
 107         select HAVE_MEMBLOCK
 108         select HAVE_MEMBLOCK_NODE_MAP
 109         select HAVE_DMA_API_DEBUG
 110         select HAVE_OPROFILE
 111         select HAVE_DEBUG_KMEMLEAK
 112         select ARCH_HAS_SG_CHAIN
 113         select GENERIC_ATOMIC64 if PPC32
 114         select HAVE_PERF_EVENTS
 115         select HAVE_PERF_REGS
 116         select HAVE_PERF_USER_STACK_DUMP
 117         select HAVE_REGS_AND_STACK_ACCESS_API
 118         select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
 119         select ARCH_WANT_IPC_PARSE_VERSION
 120         select SPARSE_IRQ
 121         select IRQ_DOMAIN
 122         select GENERIC_IRQ_SHOW
 123         select GENERIC_IRQ_SHOW_LEVEL
 124         select IRQ_FORCED_THREADING
 125         select HAVE_RCU_TABLE_FREE if SMP
 126         select HAVE_SYSCALL_TRACEPOINTS
 127         select HAVE_CBPF_JIT if !PPC64
 128         select HAVE_EBPF_JIT if PPC64
 129         select HAVE_ARCH_JUMP_LABEL
 130         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 131         select ARCH_HAS_GCOV_PROFILE_ALL
 132         select GENERIC_SMP_IDLE_THREAD
 133         select GENERIC_CMOS_UPDATE
 134         select GENERIC_TIME_VSYSCALL_OLD
 135         select GENERIC_CLOCKEVENTS
 136         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 137         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 138         select GENERIC_STRNCPY_FROM_USER
 139         select GENERIC_STRNLEN_USER
 140         select HAVE_MOD_ARCH_SPECIFIC
 141         select MODULES_USE_ELF_RELA
 142         select CLONE_BACKWARDS
 143         select ARCH_USE_BUILTIN_BSWAP
 144         select OLD_SIGSUSPEND
 145         select OLD_SIGACTION if PPC32
 146         select HAVE_DEBUG_STACKOVERFLOW
 147         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 148         select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 149         select HAVE_ARCH_AUDITSYSCALL
 150         select ARCH_SUPPORTS_ATOMIC_RMW
 151         select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
 152         select NO_BOOTMEM
 153         select HAVE_GENERIC_RCU_GUP
 154         select HAVE_PERF_EVENTS_NMI if PPC64
 155         select HAVE_NMI if PERF_EVENTS
 156         select EDAC_SUPPORT
 157         select EDAC_ATOMIC_SCRUB
 158         select ARCH_HAS_DMA_SET_COHERENT_MASK
 159         select ARCH_HAS_DEVMEM_IS_ALLOWED
 160         select HAVE_ARCH_SECCOMP_FILTER
 161         select ARCH_HAS_UBSAN_SANITIZE_ALL
 162         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 163         select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
 164         select GENERIC_CPU_AUTOPROBE
 165         select HAVE_VIRT_CPU_ACCOUNTING
 166         select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
 167         select HAVE_ARCH_HARDENED_USERCOPY
 168         select HAVE_KERNEL_GZIP
 169         select HAVE_CONTEXT_TRACKING if PPC64
 170
 171 config GENERIC_CSUM
 172         def_bool n
 173
 174 config EARLY_PRINTK
 175         bool
 176         default y
 177
 178 config PANIC_TIMEOUT
 179         int
 180         default 180
 181
 182 config COMPAT
 183         bool
 184         default y if PPC64
 185         select COMPAT_BINFMT_ELF
 186         select ARCH_WANT_OLD_COMPAT_IPC
 187         select COMPAT_OLD_SIGACTION
 188
 189 config SYSVIPC_COMPAT
 190         bool
 191         depends on COMPAT && SYSVIPC
 192         default y
 193
 194 # All PPC32s use generic nvram driver through ppc_md
 195 config GENERIC_NVRAM
 196         bool
 197         default y if PPC32
 198
 199 config SCHED_OMIT_FRAME_POINTER
 200         bool
 201         default y
 202
 203 config ARCH_MAY_HAVE_PC_FDC
 204         bool
 205         default PCI
 206
 207 config PPC_UDBG_16550
 208         bool
 209         default n
 210
 211 config GENERIC_TBSYNC
 212         bool
 213         default y if PPC32 && SMP
 214         default n
 215
 216 config AUDIT_ARCH
 217         bool
 218         default y
 219
 220 config GENERIC_BUG
 221         bool
 222         default y
 223         depends on BUG
 224
 225 config SYS_SUPPORTS_APM_EMULATION
 226         default y if PMAC_APM_EMU
 227         bool
 228
 229 config EPAPR_BOOT
 230         bool
 231         help
 232           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 233         default n
 234
 235 config DEFAULT_UIMAGE
 236         bool
 237         help
 238           Used to allow a board to specify it wants a uImage built by default
 239         default n
 240
 241 config ARCH_HIBERNATION_POSSIBLE
 242         bool
 243         default y
 244
 245 config ARCH_SUSPEND_POSSIBLE
 246         def_bool y
 247         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 248                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 249                    || 44x || 40x
 250
 251 config PPC_DCR_NATIVE
 252         bool
 253         default n
 254
 255 config PPC_DCR_MMIO
 256         bool
 257         default n
 258
 259 config PPC_DCR
 260         bool
 261         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 262         default y
 263
 264 config PPC_OF_PLATFORM_PCI
 265         bool
 266         depends on PCI
 267         depends on PPC64 # not supported on 32 bits yet
 268         default n
 269
 270 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 271         depends on PPC32 || PPC_STD_MMU_64
 272         def_bool y
 273
 274 config ARCH_SUPPORTS_UPROBES
 275         def_bool y
 276
 277 config PPC_ADV_DEBUG_REGS
 278         bool
 279         depends on 40x || BOOKE
 280         default y
 281
 282 config PPC_ADV_DEBUG_IACS
 283         int
 284         depends on PPC_ADV_DEBUG_REGS
 285         default 4 if 44x
 286         default 2
 287
 288 config PPC_ADV_DEBUG_DACS
 289         int
 290         depends on PPC_ADV_DEBUG_REGS
 291         default 2
 292
 293 config PPC_ADV_DEBUG_DVCS
 294         int
 295         depends on PPC_ADV_DEBUG_REGS
 296         default 2 if 44x
 297         default 0
 298
 299 config PPC_ADV_DEBUG_DAC_RANGE
 300         bool
 301         depends on PPC_ADV_DEBUG_REGS && 44x
 302         default y
 303
 304 config PPC_EMULATE_SSTEP
 305         bool
 306         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 307
 308 config ZONE_DMA32
 309         bool
 310         default y if PPC64
 311
 312 config PGTABLE_LEVELS
 313         int
 314         default 2 if !PPC64
 315         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 316         default 4
 317
 318 source "init/Kconfig"
 319
 320 source "kernel/Kconfig.freezer"
 321
 322 source "arch/powerpc/sysdev/Kconfig"
 323 source "arch/powerpc/platforms/Kconfig"
 324
 325 menu "Kernel options"
 326
 327 config HIGHMEM
 328         bool "High memory support"
 329         depends on PPC32
 330
 331 source kernel/Kconfig.hz
 332 source kernel/Kconfig.preempt
 333 source "fs/Kconfig.binfmt"
 334
 335 config HUGETLB_PAGE_SIZE_VARIABLE
 336         bool
 337         depends on HUGETLB_PAGE
 338         default y
 339
 340 config MATH_EMULATION
 341         bool "Math emulation"
 342         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 343         ---help---
 344           Some PowerPC chips designed for embedded applications do not have
 345           a floating-point unit and therefore do not implement the
 346           floating-point instructions in the PowerPC instruction set.  If you
 347           say Y here, the kernel will include code to emulate a floating-point
 348           unit, which will allow programs that use floating-point
 349           instructions to run.
 350
 351           This is also useful to emulate missing (optional) instructions
 352           such as fsqrt on cores that do have an FPU but do not implement
 353           them (such as Freescale BookE).
 354
 355 choice
 356         prompt "Math emulation options"
 357         default MATH_EMULATION_FULL
 358         depends on MATH_EMULATION
 359
 360 config  MATH_EMULATION_FULL
 361         bool "Emulate all the floating point instructions"
 362         ---help---
 363           Select this option will enable the kernel to support to emulate
 364           all the floating point instructions. If your SoC doesn't have
 365           a FPU, you should select this.
 366
 367 config MATH_EMULATION_HW_UNIMPLEMENTED
 368         bool "Just emulate the FPU unimplemented instructions"
 369         ---help---
 370           Select this if you know there does have a hardware FPU on your
 371           SoC, but some floating point instructions are not implemented by that.
 372
 373 endchoice
 374
 375 config PPC_TRANSACTIONAL_MEM
 376        bool "Transactional Memory support for POWERPC"
 377        depends on PPC_BOOK3S_64
 378        depends on SMP
 379        select ALTIVEC
 380        select VSX
 381        default n
 382        ---help---
 383          Support user-mode Transactional Memory on POWERPC.
 384
 385 config DISABLE_MPROFILE_KERNEL
 386         bool "Disable use of mprofile-kernel for kernel tracing"
 387         depends on PPC64 && CPU_LITTLE_ENDIAN
 388         default y
 389         help
 390           Selecting this options disables use of the mprofile-kernel ABI for
 391           kernel tracing. That will cause options such as live patching
 392           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 393           be disabled also.
 394
 395           If you have a toolchain which supports mprofile-kernel, then you can
 396           disable this. Otherwise leave it enabled. If you're not sure, say
 397           "Y".
 398
 399 config MPROFILE_KERNEL
 400         depends on PPC64 && CPU_LITTLE_ENDIAN
 401         def_bool !DISABLE_MPROFILE_KERNEL
 402
 403 config USE_THIN_ARCHIVES
 404         bool "Build the kernel using thin archives"
 405         default n
 406         select THIN_ARCHIVES
 407         help
 408           Build the kernel using thin archives.
 409           If you're unsure say N.
 410
 411 config IOMMU_HELPER
 412         def_bool PPC64
 413
 414 config SWIOTLB
 415         bool "SWIOTLB support"
 416         default n
 417         select IOMMU_HELPER
 418         ---help---
 419           Support for IO bounce buffering for systems without an IOMMU.
 420           This allows us to DMA to the full physical address space on
 421           platforms where the size of a physical address is larger
 422           than the bus address.  Not all platforms support this.
 423
 424 config HOTPLUG_CPU
 425         bool "Support for enabling/disabling CPUs"
 426         depends on SMP && (PPC_PSERIES || \
 427         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 428         ---help---
 429           Say Y here to be able to disable and re-enable individual
 430           CPUs at runtime on SMP machines.
 431
 432           Say N if you are unsure.
 433
 434 config ARCH_CPU_PROBE_RELEASE
 435         def_bool y
 436         depends on HOTPLUG_CPU
 437
 438 config ARCH_ENABLE_MEMORY_HOTPLUG
 439         def_bool y
 440
 441 config ARCH_HAS_WALK_MEMORY
 442         def_bool y
 443
 444 config ARCH_ENABLE_MEMORY_HOTREMOVE
 445         def_bool y
 446
 447 config PPC64_SUPPORTS_MEMORY_FAILURE
 448         bool "Add support for memory hwpoison"
 449         depends on PPC_BOOK3S_64
 450         default "y" if PPC_POWERNV
 451         select ARCH_SUPPORTS_MEMORY_FAILURE
 452
 453 config KEXEC
 454         bool "kexec system call"
 455         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 456         select KEXEC_CORE
 457         help
 458           kexec is a system call that implements the ability to shutdown your
 459           current kernel, and to start another kernel.  It is like a reboot
 460           but it is independent of the system firmware.   And like a reboot
 461           you can start any kernel with it, not just Linux.
 462
 463           The name comes from the similarity to the exec system call.
 464
 465           It is an ongoing process to be certain the hardware in a machine
 466           is properly shutdown, so do not be surprised if this code does not
 467           initially work for you.  As of this writing the exact hardware
 468           interface is strongly in flux, so no good recommendation can be
 469           made.
 470
 471 config KEXEC_FILE
 472         bool "kexec file based system call"
 473         select KEXEC_CORE
 474         select HAVE_IMA_KEXEC
 475         select BUILD_BIN2C
 476         depends on PPC64
 477         depends on CRYPTO=y
 478         depends on CRYPTO_SHA256=y
 479         help
 480           This is a new version of the kexec system call. This call is
 481           file based and takes in file descriptors as system call arguments
 482           for kernel and initramfs as opposed to a list of segments as is the
 483           case for the older kexec call.
 484
 485 config RELOCATABLE
 486         bool "Build a relocatable kernel"
 487         depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
 488         select NONSTATIC_KERNEL
 489         select MODULE_REL_CRCS if MODVERSIONS
 490         help
 491           This builds a kernel image that is capable of running at the
 492           location the kernel is loaded at. For ppc32, there is no any
 493           alignment restrictions, and this feature is a superset of
 494           DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 495           16k-aligned base address. The kernel is linked as a
 496           position-independent executable (PIE) and contains dynamic relocations
 497           which are processed early in the bootup process.
 498
 499           One use is for the kexec on panic case where the recovery kernel
 500           must live at a different physical address than the primary
 501           kernel.
 502
 503           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 504           it has been loaded at and the compile time physical addresses
 505           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 506           setting can still be useful to bootwrappers that need to know the
 507           load address of the kernel (eg. u-boot/mkimage).
 508
 509 config RELOCATABLE_TEST
 510         bool "Test relocatable kernel"
 511         depends on (PPC64 && RELOCATABLE)
 512         default n
 513         help
 514           This runs the relocatable kernel at the address it was initially
 515           loaded at, which tends to be non-zero and therefore test the
 516           relocation code.
 517
 518 config CRASH_DUMP
 519         bool "Build a kdump crash kernel"
 520         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 521         select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
 522         help
 523           Build a kernel suitable for use as a kdump capture kernel.
 524           The same kernel binary can be used as production kernel and dump
 525           capture kernel.
 526
 527 config FA_DUMP
 528         bool "Firmware-assisted dump"
 529         depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC_CORE
 530         help
 531           A robust mechanism to get reliable kernel crash dump with
 532           assistance from firmware. This approach does not use kexec,
 533           instead firmware assists in booting the kdump kernel
 534           while preserving memory contents. Firmware-assisted dump
 535           is meant to be a kdump replacement offering robustness and
 536           speed not possible without system firmware assistance.
 537
 538           If unsure, say "N"
 539
 540 config IRQ_ALL_CPUS
 541         bool "Distribute interrupts on all CPUs by default"
 542         depends on SMP
 543         help
 544           This option gives the kernel permission to distribute IRQs across
 545           multiple CPUs.  Saying N here will route all IRQs to the first
 546           CPU.  Generally saying Y is safe, although some problems have been
 547           reported with SMP Power Macintoshes with this option enabled.
 548
 549 config NUMA
 550         bool "NUMA support"
 551         depends on PPC64
 552         default y if SMP && PPC_PSERIES
 553
 554 config NODES_SHIFT
 555         int
 556         default "8" if PPC64
 557         default "4"
 558         depends on NEED_MULTIPLE_NODES
 559
 560 config USE_PERCPU_NUMA_NODE_ID
 561         def_bool y
 562         depends on NUMA
 563
 564 config HAVE_MEMORYLESS_NODES
 565         def_bool y
 566         depends on NUMA
 567
 568 config ARCH_SELECT_MEMORY_MODEL
 569         def_bool y
 570         depends on PPC64
 571
 572 config ARCH_FLATMEM_ENABLE
 573         def_bool y
 574         depends on (PPC64 && !NUMA) || PPC32
 575
 576 config ARCH_SPARSEMEM_ENABLE
 577         def_bool y
 578         depends on PPC64
 579         select SPARSEMEM_VMEMMAP_ENABLE
 580
 581 config ARCH_SPARSEMEM_DEFAULT
 582         def_bool y
 583         depends on (SMP && PPC_PSERIES) || PPC_PS3
 584
 585 config SYS_SUPPORTS_HUGETLBFS
 586         bool
 587
 588 config ILLEGAL_POINTER_VALUE
 589         hex
 590         # This is roughly half way between the top of user space and the bottom
 591         # of kernel space, which seems about as good as we can get.
 592         default 0x5deadbeef0000000 if PPC64
 593         default 0
 594
 595 source "mm/Kconfig"
 596
 597 config ARCH_MEMORY_PROBE
 598         def_bool y
 599         depends on MEMORY_HOTPLUG
 600
 601 # Some NUMA nodes have memory ranges that span
 602 # other nodes.  Even though a pfn is valid and
 603 # between a node's start and end pfns, it may not
 604 # reside on that node.  See memmap_init_zone()
 605 # for details.
 606 config NODES_SPAN_OTHER_NODES
 607         def_bool y
 608         depends on NEED_MULTIPLE_NODES
 609
 610 config STDBINUTILS
 611         bool "Using standard binutils settings"
 612         depends on 44x
 613         default y
 614         help
 615           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 616           Note, that kernel will be able to run only those applications,
 617           which had been compiled using binutils later than 2.17.50.0.3 with
 618           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 619           the older binutils, you can patch them with a trivial patch, which
 620           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 621
 622 choice
 623         prompt "Page size"
 624         default PPC_4K_PAGES
 625         help
 626           Select the kernel logical page size. Increasing the page size
 627           will reduce software overhead at each page boundary, allow
 628           hardware prefetch mechanisms to be more effective, and allow
 629           larger dma transfers increasing IO efficiency and reducing
 630           overhead. However the utilization of memory will increase.
 631           For example, each cached file will using a multiple of the
 632           page size to hold its contents and the difference between the
 633           end of file and the end of page is wasted.
 634
 635           Some dedicated systems, such as software raid serving with
 636           accelerated calculations, have shown significant increases.
 637
 638           If you configure a 64 bit kernel for 64k pages but the
 639           processor does not support them, then the kernel will simulate
 640           them with 4k pages, loading them on demand, but with the
 641           reduced software overhead and larger internal fragmentation.
 642           For the 32 bit kernel, a large page option will not be offered
 643           unless it is supported by the configured processor.
 644
 645           If unsure, choose 4K_PAGES.
 646
 647 config PPC_4K_PAGES
 648         bool "4k page size"
 649         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 650
 651 config PPC_16K_PAGES
 652         bool "16k page size"
 653         depends on 44x || PPC_8xx
 654
 655 config PPC_64K_PAGES
 656         bool "64k page size"
 657         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 658         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 659
 660 config PPC_256K_PAGES
 661         bool "256k page size"
 662         depends on 44x && !STDBINUTILS
 663         help
 664           Make the page size 256k.
 665
 666           As the ELF standard only requires alignment to support page
 667           sizes up to 64k, you will need to compile all of your user
 668           space applications with a non-standard binutils settings
 669           (see the STDBINUTILS description for details).
 670
 671           Say N unless you know what you are doing.
 672
 673 endchoice
 674
 675 config FORCE_MAX_ZONEORDER
 676         int "Maximum zone order"
 677         range 8 9 if PPC64 && PPC_64K_PAGES
 678         default "9" if PPC64 && PPC_64K_PAGES
 679         range 13 13 if PPC64 && !PPC_64K_PAGES
 680         default "13" if PPC64 && !PPC_64K_PAGES
 681         range 9 64 if PPC32 && PPC_16K_PAGES
 682         default "9" if PPC32 && PPC_16K_PAGES
 683         range 7 64 if PPC32 && PPC_64K_PAGES
 684         default "7" if PPC32 && PPC_64K_PAGES
 685         range 5 64 if PPC32 && PPC_256K_PAGES
 686         default "5" if PPC32 && PPC_256K_PAGES
 687         range 11 64
 688         default "11"
 689         help
 690           The kernel memory allocator divides physically contiguous memory
 691           blocks into "zones", where each zone is a power of two number of
 692           pages.  This option selects the largest power of two that the kernel
 693           keeps in the memory allocator.  If you need to allocate very large
 694           blocks of physically contiguous memory, then you may need to
 695           increase this value.
 696
 697           This config option is actually maximum order plus one. For example,
 698           a value of 11 means that the largest free memory block is 2^10 pages.
 699
 700           The page size is not necessarily 4KB.  For example, on 64-bit
 701           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 702           this in mind when choosing a value for this option.
 703
 704 config PPC_SUBPAGE_PROT
 705         bool "Support setting protections for 4k subpages"
 706         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 707         help
 708           This option adds support for a system call to allow user programs
 709           to set access permissions (read/write, readonly, or no access)
 710           on the 4k subpages of each 64k page.
 711
 712 config PPC_COPRO_BASE
 713         bool
 714         default n
 715
 716 config SCHED_SMT
 717         bool "SMT (Hyperthreading) scheduler support"
 718         depends on PPC64 && SMP
 719         help
 720           SMT scheduler support improves the CPU scheduler's decision making
 721           when dealing with POWER5 cpus at a cost of slightly increased
 722           overhead in some places. If unsure say N here.
 723
 724 config PPC_DENORMALISATION
 725         bool "PowerPC denormalisation exception handling"
 726         depends on PPC_BOOK3S_64
 727         default "y" if PPC_POWERNV
 728         ---help---
 729           Add support for handling denormalisation of single precision
 730           values.  Useful for bare metal only.  If unsure say Y here.
 731
 732 config CMDLINE_BOOL
 733         bool "Default bootloader kernel arguments"
 734
 735 config CMDLINE
 736         string "Initial kernel command string"
 737         depends on CMDLINE_BOOL
 738         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 739         help
 740           On some platforms, there is currently no way for the boot loader to
 741           pass arguments to the kernel. For these platforms, you can supply
 742           some command-line options at build time by entering them here.  In
 743           most cases you will need to specify the root device here.
 744
 745 config CMDLINE_FORCE
 746         bool "Always use the default kernel command string"
 747         depends on CMDLINE_BOOL
 748         help
 749           Always use the default kernel command string, even if the boot
 750           loader passes other arguments to the kernel.
 751           This is useful if you cannot or don't want to change the
 752           command-line options your boot loader passes to the kernel.
 753
 754 config EXTRA_TARGETS
 755         string "Additional default image types"
 756         help
 757           List additional targets to be built by the bootwrapper here (separated
 758           by spaces).  This is useful for targets that depend of device tree
 759           files in the .dts directory.
 760
 761           Targets in this list will be build as part of the default build
 762           target, or when the user does a 'make zImage' or a
 763           'make zImage.initrd'.
 764
 765           If unsure, leave blank
 766
 767 config ARCH_WANTS_FREEZER_CONTROL
 768         def_bool y
 769         depends on ADB_PMU
 770
 771 source kernel/power/Kconfig
 772
 773 config SECCOMP
 774         bool "Enable seccomp to safely compute untrusted bytecode"
 775         depends on PROC_FS
 776         default y
 777         help
 778           This kernel feature is useful for number crunching applications
 779           that may need to compute untrusted bytecode during their
 780           execution. By using pipes or other transports made available to
 781           the process as file descriptors supporting the read/write
 782           syscalls, it's possible to isolate those applications in
 783           their own address space using seccomp. Once seccomp is
 784           enabled via /proc/<pid>/seccomp, it cannot be disabled
 785           and the task is only allowed to execute a few safe syscalls
 786           defined by each seccomp mode.
 787
 788           If unsure, say Y. Only embedded should say N here.
 789
 790 endmenu
 791
 792 config ISA_DMA_API
 793         bool
 794         default PCI
 795
 796 menu "Bus options"
 797
 798 config ISA
 799         bool "Support for ISA-bus hardware"
 800         depends on PPC_CHRP
 801         select PPC_I8259
 802         help
 803           Find out whether you have ISA slots on your motherboard.  ISA is the
 804           name of a bus system, i.e. the way the CPU talks to the other stuff
 805           inside your box.  If you have an Apple machine, say N here; if you
 806           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 807           embedded board, consult your board documentation.
 808
 809 config ZONE_DMA
 810         bool
 811         default y
 812
 813 config NEED_DMA_MAP_STATE
 814         def_bool (PPC64 || NOT_COHERENT_CACHE)
 815
 816 config NEED_SG_DMA_LENGTH
 817         def_bool y
 818
 819 config GENERIC_ISA_DMA
 820         bool
 821         depends on ISA_DMA_API
 822         default y
 823
 824 config PPC_INDIRECT_PCI
 825         bool
 826         depends on PCI
 827         default y if 40x || 44x
 828         default n
 829
 830 config EISA
 831         bool
 832
 833 config SBUS
 834         bool
 835
 836 config FSL_SOC
 837         bool
 838
 839 config FSL_PCI
 840         bool
 841         select PPC_INDIRECT_PCI
 842         select PCI_QUIRKS
 843
 844 config FSL_PMC
 845         bool
 846         default y
 847         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 848         help
 849           Freescale MPC85xx/MPC86xx power management controller support
 850           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 851
 852 config PPC4xx_CPM
 853         bool
 854         default y
 855         depends on SUSPEND && (44x || 40x)
 856         help
 857           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 858           It also enables support for two different idle states (idle-wait
 859           and idle-doze).
 860
 861 config 4xx_SOC
 862         bool
 863
 864 config FSL_LBC
 865         bool "Freescale Local Bus support"
 866         help
 867           Enables reporting of errors from the Freescale local bus
 868           controller.  Also contains some common code used by
 869           drivers for specific local bus peripherals.
 870
 871 config FSL_GTM
 872         bool
 873         depends on PPC_83xx || QUICC_ENGINE || CPM2
 874         help
 875           Freescale General-purpose Timers support
 876
 877 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 878 config MCA
 879         bool
 880
 881 # Platforms that what PCI turned unconditionally just do select PCI
 882 # in their config node.  Platforms that want to choose at config
 883 # time should select PPC_PCI_CHOICE
 884 config PPC_PCI_CHOICE
 885         bool
 886
 887 config PCI
 888         bool "PCI support" if PPC_PCI_CHOICE
 889         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 890                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 891         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 892         select GENERIC_PCI_IOMAP
 893         help
 894           Find out whether your system includes a PCI bus. PCI is the name of
 895           a bus system, i.e. the way the CPU talks to the other stuff inside
 896           your box.  If you say Y here, the kernel will include drivers and
 897           infrastructure code to support PCI bus devices.
 898
 899 config PCI_DOMAINS
 900         def_bool PCI
 901
 902 config PCI_SYSCALL
 903         def_bool PCI
 904
 905 config PCI_QSPAN
 906         bool "QSpan PCI"
 907         depends on !4xx && !CPM2 && 8xx
 908         select PPC_I8259
 909         help
 910           Say Y here if you have a system based on a Motorola 8xx-series
 911           embedded processor with a QSPAN PCI interface, otherwise say N.
 912
 913 config PCI_8260
 914         bool
 915         depends on PCI && 8260
 916         select PPC_INDIRECT_PCI
 917         default y
 918
 919 source "drivers/pci/Kconfig"
 920
 921 source "drivers/pcmcia/Kconfig"
 922
 923 config HAS_RAPIDIO
 924         bool
 925         default n
 926
 927 config RAPIDIO
 928         tristate "RapidIO support"
 929         depends on HAS_RAPIDIO || PCI
 930         help
 931           If you say Y here, the kernel will include drivers and
 932           infrastructure code to support RapidIO interconnect devices.
 933
 934 config FSL_RIO
 935         bool "Freescale Embedded SRIO Controller support"
 936         depends on RAPIDIO = y && HAS_RAPIDIO
 937         default "n"
 938         ---help---
 939           Include support for RapidIO controller on Freescale embedded
 940           processors (MPC8548, MPC8641, etc).
 941
 942 source "drivers/rapidio/Kconfig"
 943
 944 endmenu
 945
 946 config NONSTATIC_KERNEL
 947         bool
 948         default n
 949
 950 menu "Advanced setup"
 951         depends on PPC32
 952
 953 config ADVANCED_OPTIONS
 954         bool "Prompt for advanced kernel configuration options"
 955         help
 956           This option will enable prompting for a variety of advanced kernel
 957           configuration options.  These options can cause the kernel to not
 958           work if they are set incorrectly, but can be used to optimize certain
 959           aspects of kernel memory management.
 960
 961           Unless you know what you are doing, say N here.
 962
 963 comment "Default settings for advanced configuration options are used"
 964         depends on !ADVANCED_OPTIONS
 965
 966 config LOWMEM_SIZE_BOOL
 967         bool "Set maximum low memory"
 968         depends on ADVANCED_OPTIONS
 969         help
 970           This option allows you to set the maximum amount of memory which
 971           will be used as "low memory", that is, memory which the kernel can
 972           access directly, without having to set up a kernel virtual mapping.
 973           This can be useful in optimizing the layout of kernel virtual
 974           memory.
 975
 976           Say N here unless you know what you are doing.
 977
 978 config LOWMEM_SIZE
 979         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
 980         default "0x30000000"
 981
 982 config LOWMEM_CAM_NUM_BOOL
 983         bool "Set number of CAMs to use to map low memory"
 984         depends on ADVANCED_OPTIONS && FSL_BOOKE
 985         help
 986           This option allows you to set the maximum number of CAM slots that
 987           will be used to map low memory.  There are a limited number of slots
 988           available and even more limited number that will fit in the L1 MMU.
 989           However, using more entries will allow mapping more low memory.  This
 990           can be useful in optimizing the layout of kernel virtual memory.
 991
 992           Say N here unless you know what you are doing.
 993
 994 config LOWMEM_CAM_NUM
 995         depends on FSL_BOOKE
 996         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
 997         default 3
 998
 999 config DYNAMIC_MEMSTART
1000         bool "Enable page aligned dynamic load address for kernel"
1001         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1002         select NONSTATIC_KERNEL
1003         help
1004           This option enables the kernel to be loaded at any page aligned
1005           physical address. The kernel creates a mapping from KERNELBASE to
1006           the address where the kernel is loaded. The page size here implies
1007           the TLB page size of the mapping for kernel on the particular platform.
1008           Please refer to the init code for finding the TLB page size.
1009
1010           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1011           kernel image, where the only restriction is the page aligned kernel
1012           load address. When this option is enabled, the compile time physical
1013           address CONFIG_PHYSICAL_START is ignored.
1014
1015           This option is overridden by CONFIG_RELOCATABLE
1016
1017 config PAGE_OFFSET_BOOL
1018         bool "Set custom page offset address"
1019         depends on ADVANCED_OPTIONS
1020         help
1021           This option allows you to set the kernel virtual address at which
1022           the kernel will map low memory.  This can be useful in optimizing
1023           the virtual memory layout of the system.
1024
1025           Say N here unless you know what you are doing.
1026
1027 config PAGE_OFFSET
1028         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1029         default "0xc0000000"
1030
1031 config KERNEL_START_BOOL
1032         bool "Set custom kernel base address"
1033         depends on ADVANCED_OPTIONS
1034         help
1035           This option allows you to set the kernel virtual address at which
1036           the kernel will be loaded.  Normally this should match PAGE_OFFSET
1037           however there are times (like kdump) that one might not want them
1038           to be the same.
1039
1040           Say N here unless you know what you are doing.
1041
1042 config KERNEL_START
1043         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1044         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1045         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1046         default "0xc0000000"
1047
1048 config PHYSICAL_START_BOOL
1049         bool "Set physical address where the kernel is loaded"
1050         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1051         help
1052           This gives the physical address where the kernel is loaded.
1053
1054           Say N here unless you know what you are doing.
1055
1056 config PHYSICAL_START
1057         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1058         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1059         default "0x00000000"
1060
1061 config PHYSICAL_ALIGN
1062         hex
1063         default "0x04000000" if FSL_BOOKE
1064         help
1065           This value puts the alignment restrictions on physical address
1066           where kernel is loaded and run from. Kernel is compiled for an
1067           address which meets above alignment restriction.
1068
1069 config TASK_SIZE_BOOL
1070         bool "Set custom user task size"
1071         depends on ADVANCED_OPTIONS
1072         help
1073           This option allows you to set the amount of virtual address space
1074           allocated to user tasks.  This can be useful in optimizing the
1075           virtual memory layout of the system.
1076
1077           Say N here unless you know what you are doing.
1078
1079 config TASK_SIZE
1080         hex "Size of user task space" if TASK_SIZE_BOOL
1081         default "0x80000000" if PPC_8xx
1082         default "0xc0000000"
1083
1084 config CONSISTENT_SIZE_BOOL
1085         bool "Set custom consistent memory pool size"
1086         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1087         help
1088           This option allows you to set the size of the
1089           consistent memory pool.  This pool of virtual memory
1090           is used to make consistent memory allocations.
1091
1092 config CONSISTENT_SIZE
1093         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1094         default "0x00200000" if NOT_COHERENT_CACHE
1095
1096 config PIN_TLB
1097         bool "Pinned Kernel TLBs (860 ONLY)"
1098         depends on ADVANCED_OPTIONS && 8xx
1099
1100 config PIN_TLB_IMMR
1101         bool "Pinned TLB for IMMR"
1102         depends on PIN_TLB
1103         default y
1104 endmenu
1105
1106 if PPC64
1107 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1108 config PAGE_OFFSET
1109         hex
1110         default "0xc000000000000000"
1111 config KERNEL_START
1112         hex
1113         default "0xc000000000000000"
1114 config PHYSICAL_START
1115         hex
1116         default "0x00000000"
1117 endif
1118
1119 config  ARCH_RANDOM
1120         def_bool n
1121
1122 source "net/Kconfig"
1123
1124 source "drivers/Kconfig"
1125
1126 source "fs/Kconfig"
1127
1128 source "lib/Kconfig"
1129
1130 source "arch/powerpc/Kconfig.debug"
1131
1132 source "security/Kconfig"
1133
1134 config KEYS_COMPAT
1135         bool
1136         depends on COMPAT && KEYS
1137         default y
1138
1139 source "crypto/Kconfig"
1140
1141 config PPC_LIB_RHEAP
1142         bool
1143
1144 source "arch/powerpc/kvm/Kconfig"
1145
1146 source "kernel/livepatch/Kconfig"