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 ARCH_MMAP_RND_BITS_MAX
  26         # On Book3S 64, the default virtual address space for 64-bit processes
  27         # is 2^47 (128TB). As a maximum, allow randomisation to consume up to
  28         # 32T of address space (2^45), which should ensure a reasonable gap
  29         # between bottom-up and top-down allocations for applications that
  30         # consume "normal" amounts of address space. Book3S 64 only supports 64K
  31         # and 4K page sizes.
  32         default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
  33         default 33 if PPC_BOOK3S_64                  # 33 = 45 (32T) - 12 (4K)
  34         #
  35         # On all other 64-bit platforms (currently only Book3E), the virtual
  36         # address space is 2^46 (64TB). Allow randomisation to consume up to 16T
  37         # of address space (2^44). Only 4K page sizes are supported.
  38         default 32 if 64BIT     # 32 = 44 (16T) - 12 (4K)
  39         #
  40         # For 32-bit, use the compat values, as they're the same.
  41         default ARCH_MMAP_RND_COMPAT_BITS_MAX
  42
  43 config ARCH_MMAP_RND_BITS_MIN
  44         # Allow randomisation to consume up to 1GB of address space (2^30).
  45         default 14 if 64BIT && PPC_64K_PAGES    # 14 = 30 (1GB) - 16 (64K)
  46         default 18 if 64BIT                     # 18 = 30 (1GB) - 12 (4K)
  47         #
  48         # For 32-bit, use the compat values, as they're the same.
  49         default ARCH_MMAP_RND_COMPAT_BITS_MIN
  50
  51 config ARCH_MMAP_RND_COMPAT_BITS_MAX
  52         # Total virtual address space for 32-bit processes is 2^31 (2GB).
  53         # Allow randomisation to consume up to 512MB of address space (2^29).
  54         default 11 if PPC_256K_PAGES    # 11 = 29 (512MB) - 18 (256K)
  55         default 13 if PPC_64K_PAGES     # 13 = 29 (512MB) - 16 (64K)
  56         default 15 if PPC_16K_PAGES     # 15 = 29 (512MB) - 14 (16K)
  57         default 17                      # 17 = 29 (512MB) - 12 (4K)
  58
  59 config ARCH_MMAP_RND_COMPAT_BITS_MIN
  60         # Total virtual address space for 32-bit processes is 2^31 (2GB).
  61         # Allow randomisation to consume up to 8MB of address space (2^23).
  62         default 5 if PPC_256K_PAGES     #  5 = 23 (8MB) - 18 (256K)
  63         default 7 if PPC_64K_PAGES      #  7 = 23 (8MB) - 16 (64K)
  64         default 9 if PPC_16K_PAGES      #  9 = 23 (8MB) - 14 (16K)
  65         default 11                      # 11 = 23 (8MB) - 12 (4K)
  66
  67 config HAVE_SETUP_PER_CPU_AREA
  68         def_bool PPC64
  69
  70 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  71         def_bool PPC64
  72
  73 config NR_IRQS
  74         int "Number of virtual interrupt numbers"
  75         range 32 32768
  76         default "512"
  77         help
  78           This defines the number of virtual interrupt numbers the kernel
  79           can manage. Virtual interrupt numbers are what you see in
  80           /proc/interrupts. If you configure your system to have too few,
  81           drivers will fail to load or worse - handle with care.
  82
  83 config NMI_IPI
  84         bool
  85         depends on SMP && (DEBUGGER || KEXEC_CORE)
  86         default y
  87
  88 config STACKTRACE_SUPPORT
  89         bool
  90         default y
  91
  92 config TRACE_IRQFLAGS_SUPPORT
  93         bool
  94         default y
  95
  96 config LOCKDEP_SUPPORT
  97         bool
  98         default y
  99
 100 config RWSEM_GENERIC_SPINLOCK
 101         bool
 102
 103 config RWSEM_XCHGADD_ALGORITHM
 104         bool
 105         default y
 106
 107 config GENERIC_LOCKBREAK
 108         bool
 109         default y
 110         depends on SMP && PREEMPT
 111
 112 config GENERIC_HWEIGHT
 113         bool
 114         default y
 115
 116 config ARCH_HAS_DMA_SET_COHERENT_MASK
 117         bool
 118
 119 config PPC
 120         bool
 121         default y
 122         #
 123         # Please keep this list sorted alphabetically.
 124         #
 125         select ARCH_HAS_DEVMEM_IS_ALLOWED
 126         select ARCH_HAS_DMA_SET_COHERENT_MASK
 127         select ARCH_HAS_ELF_RANDOMIZE
 128         select ARCH_HAS_GCOV_PROFILE_ALL
 129         select ARCH_HAS_SCALED_CPUTIME          if VIRT_CPU_ACCOUNTING_NATIVE
 130         select ARCH_HAS_SG_CHAIN
 131         select ARCH_HAS_TICK_BROADCAST          if GENERIC_CLOCKEVENTS_BROADCAST
 132         select ARCH_HAS_UBSAN_SANITIZE_ALL
 133         select ARCH_HAS_ZONE_DEVICE             if PPC_BOOK3S_64
 134         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 135         select ARCH_MIGHT_HAVE_PC_PARPORT
 136         select ARCH_MIGHT_HAVE_PC_SERIO
 137         select ARCH_SUPPORTS_ATOMIC_RMW
 138         select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
 139         select ARCH_USE_BUILTIN_BSWAP
 140         select ARCH_USE_CMPXCHG_LOCKREF         if PPC64
 141         select ARCH_WANT_IPC_PARSE_VERSION
 142         select ARCH_WEAK_RELEASE_ACQUIRE
 143         select BINFMT_ELF
 144         select BUILDTIME_EXTABLE_SORT
 145         select CLONE_BACKWARDS
 146         select DCACHE_WORD_ACCESS               if PPC64 && CPU_LITTLE_ENDIAN
 147         select EDAC_ATOMIC_SCRUB
 148         select EDAC_SUPPORT
 149         select GENERIC_ATOMIC64                 if PPC32
 150         select GENERIC_CLOCKEVENTS
 151         select GENERIC_CLOCKEVENTS_BROADCAST    if SMP
 152         select GENERIC_CMOS_UPDATE
 153         select GENERIC_CPU_AUTOPROBE
 154         select GENERIC_IRQ_SHOW
 155         select GENERIC_IRQ_SHOW_LEVEL
 156         select GENERIC_SMP_IDLE_THREAD
 157         select GENERIC_STRNCPY_FROM_USER
 158         select GENERIC_STRNLEN_USER
 159         select GENERIC_TIME_VSYSCALL
 160         select HAVE_ARCH_AUDITSYSCALL
 161         select HAVE_ARCH_JUMP_LABEL
 162         select HAVE_ARCH_KGDB
 163         select HAVE_ARCH_MMAP_RND_BITS
 164         select HAVE_ARCH_MMAP_RND_COMPAT_BITS   if COMPAT
 165         select HAVE_ARCH_SECCOMP_FILTER
 166         select HAVE_ARCH_TRACEHOOK
 167         select ARCH_HAS_STRICT_KERNEL_RWX       if (PPC_BOOK3S_64 && !RELOCATABLE && !HIBERNATION)
 168         select ARCH_OPTIONAL_KERNEL_RWX         if ARCH_HAS_STRICT_KERNEL_RWX
 169         select HAVE_CBPF_JIT                    if !PPC64
 170         select HAVE_CONTEXT_TRACKING            if PPC64
 171         select HAVE_DEBUG_KMEMLEAK
 172         select HAVE_DEBUG_STACKOVERFLOW
 173         select HAVE_DMA_API_DEBUG
 174         select HAVE_DYNAMIC_FTRACE
 175         select HAVE_DYNAMIC_FTRACE_WITH_REGS    if MPROFILE_KERNEL
 176         select HAVE_EBPF_JIT                    if PPC64
 177         select HAVE_EFFICIENT_UNALIGNED_ACCESS  if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
 178         select HAVE_FTRACE_MCOUNT_RECORD
 179         select HAVE_FUNCTION_GRAPH_TRACER
 180         select HAVE_FUNCTION_TRACER
 181         select HAVE_GCC_PLUGINS
 182         select HAVE_GENERIC_GUP
 183         select HAVE_HW_BREAKPOINT               if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
 184         select HAVE_IDE
 185         select HAVE_IOREMAP_PROT
 186         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 187         select HAVE_KERNEL_GZIP
 188         select HAVE_KPROBES
 189         select HAVE_KPROBES_ON_FTRACE
 190         select HAVE_KRETPROBES
 191         select HAVE_LIVEPATCH                   if HAVE_DYNAMIC_FTRACE_WITH_REGS
 192         select HAVE_MEMBLOCK
 193         select HAVE_MEMBLOCK_NODE_MAP
 194         select HAVE_MOD_ARCH_SPECIFIC
 195         select HAVE_NMI                         if PERF_EVENTS
 196         select HAVE_OPROFILE
 197         select HAVE_OPTPROBES                   if PPC64
 198         select HAVE_PERF_EVENTS
 199         select HAVE_PERF_EVENTS_NMI             if PPC64
 200         select HAVE_PERF_REGS
 201         select HAVE_PERF_USER_STACK_DUMP
 202         select HAVE_RCU_TABLE_FREE              if SMP
 203         select HAVE_REGS_AND_STACK_ACCESS_API
 204         select HAVE_SYSCALL_TRACEPOINTS
 205         select HAVE_VIRT_CPU_ACCOUNTING
 206         select HAVE_IRQ_TIME_ACCOUNTING
 207         select IRQ_DOMAIN
 208         select IRQ_FORCED_THREADING
 209         select MODULES_USE_ELF_RELA
 210         select NO_BOOTMEM
 211         select OF
 212         select OF_EARLY_FLATTREE
 213         select OF_RESERVED_MEM
 214         select OLD_SIGACTION                    if PPC32
 215         select OLD_SIGSUSPEND
 216         select SPARSE_IRQ
 217         select SYSCTL_EXCEPTION_TRACE
 218         select VIRT_TO_BUS                      if !PPC64
 219         #
 220         # Please keep this list sorted alphabetically.
 221         #
 222
 223 config GENERIC_CSUM
 224         def_bool n
 225
 226 config EARLY_PRINTK
 227         bool
 228         default y
 229
 230 config PANIC_TIMEOUT
 231         int
 232         default 180
 233
 234 config COMPAT
 235         bool
 236         default y if PPC64
 237         select COMPAT_BINFMT_ELF
 238         select ARCH_WANT_OLD_COMPAT_IPC
 239         select COMPAT_OLD_SIGACTION
 240
 241 config SYSVIPC_COMPAT
 242         bool
 243         depends on COMPAT && SYSVIPC
 244         default y
 245
 246 # All PPC32s use generic nvram driver through ppc_md
 247 config GENERIC_NVRAM
 248         bool
 249         default y if PPC32
 250
 251 config SCHED_OMIT_FRAME_POINTER
 252         bool
 253         default y
 254
 255 config ARCH_MAY_HAVE_PC_FDC
 256         bool
 257         default PCI
 258
 259 config PPC_UDBG_16550
 260         bool
 261         default n
 262
 263 config GENERIC_TBSYNC
 264         bool
 265         default y if PPC32 && SMP
 266         default n
 267
 268 config AUDIT_ARCH
 269         bool
 270         default y
 271
 272 config GENERIC_BUG
 273         bool
 274         default y
 275         depends on BUG
 276
 277 config SYS_SUPPORTS_APM_EMULATION
 278         default y if PMAC_APM_EMU
 279         bool
 280
 281 config EPAPR_BOOT
 282         bool
 283         help
 284           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 285         default n
 286
 287 config DEFAULT_UIMAGE
 288         bool
 289         help
 290           Used to allow a board to specify it wants a uImage built by default
 291         default n
 292
 293 config ARCH_HIBERNATION_POSSIBLE
 294         bool
 295         default y
 296
 297 config ARCH_SUSPEND_POSSIBLE
 298         def_bool y
 299         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 300                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 301                    || 44x || 40x
 302
 303 config PPC_DCR_NATIVE
 304         bool
 305         default n
 306
 307 config PPC_DCR_MMIO
 308         bool
 309         default n
 310
 311 config PPC_DCR
 312         bool
 313         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 314         default y
 315
 316 config PPC_OF_PLATFORM_PCI
 317         bool
 318         depends on PCI
 319         depends on PPC64 # not supported on 32 bits yet
 320         default n
 321
 322 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 323         depends on PPC32 || PPC_STD_MMU_64
 324         def_bool y
 325
 326 config ARCH_SUPPORTS_UPROBES
 327         def_bool y
 328
 329 config PPC_ADV_DEBUG_REGS
 330         bool
 331         depends on 40x || BOOKE
 332         default y
 333
 334 config PPC_ADV_DEBUG_IACS
 335         int
 336         depends on PPC_ADV_DEBUG_REGS
 337         default 4 if 44x
 338         default 2
 339
 340 config PPC_ADV_DEBUG_DACS
 341         int
 342         depends on PPC_ADV_DEBUG_REGS
 343         default 2
 344
 345 config PPC_ADV_DEBUG_DVCS
 346         int
 347         depends on PPC_ADV_DEBUG_REGS
 348         default 2 if 44x
 349         default 0
 350
 351 config PPC_ADV_DEBUG_DAC_RANGE
 352         bool
 353         depends on PPC_ADV_DEBUG_REGS && 44x
 354         default y
 355
 356 config PPC_EMULATE_SSTEP
 357         bool
 358         default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
 359
 360 config ZONE_DMA32
 361         bool
 362         default y if PPC64
 363
 364 config PGTABLE_LEVELS
 365         int
 366         default 2 if !PPC64
 367         default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
 368         default 4
 369
 370 source "init/Kconfig"
 371
 372 source "kernel/Kconfig.freezer"
 373
 374 source "arch/powerpc/sysdev/Kconfig"
 375 source "arch/powerpc/platforms/Kconfig"
 376
 377 menu "Kernel options"
 378
 379 config HIGHMEM
 380         bool "High memory support"
 381         depends on PPC32
 382
 383 source kernel/Kconfig.hz
 384 source kernel/Kconfig.preempt
 385 source "fs/Kconfig.binfmt"
 386
 387 config HUGETLB_PAGE_SIZE_VARIABLE
 388         bool
 389         depends on HUGETLB_PAGE
 390         default y
 391
 392 config MATH_EMULATION
 393         bool "Math emulation"
 394         depends on 4xx || 8xx || PPC_MPC832x || BOOKE
 395         ---help---
 396           Some PowerPC chips designed for embedded applications do not have
 397           a floating-point unit and therefore do not implement the
 398           floating-point instructions in the PowerPC instruction set.  If you
 399           say Y here, the kernel will include code to emulate a floating-point
 400           unit, which will allow programs that use floating-point
 401           instructions to run.
 402
 403           This is also useful to emulate missing (optional) instructions
 404           such as fsqrt on cores that do have an FPU but do not implement
 405           them (such as Freescale BookE).
 406
 407 choice
 408         prompt "Math emulation options"
 409         default MATH_EMULATION_FULL
 410         depends on MATH_EMULATION
 411
 412 config  MATH_EMULATION_FULL
 413         bool "Emulate all the floating point instructions"
 414         ---help---
 415           Select this option will enable the kernel to support to emulate
 416           all the floating point instructions. If your SoC doesn't have
 417           a FPU, you should select this.
 418
 419 config MATH_EMULATION_HW_UNIMPLEMENTED
 420         bool "Just emulate the FPU unimplemented instructions"
 421         ---help---
 422           Select this if you know there does have a hardware FPU on your
 423           SoC, but some floating point instructions are not implemented by that.
 424
 425 endchoice
 426
 427 config PPC_TRANSACTIONAL_MEM
 428        bool "Transactional Memory support for POWERPC"
 429        depends on PPC_BOOK3S_64
 430        depends on SMP
 431        select ALTIVEC
 432        select VSX
 433        default n
 434        ---help---
 435          Support user-mode Transactional Memory on POWERPC.
 436
 437 config LD_HEAD_STUB_CATCH
 438         bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
 439         depends on PPC64
 440         default n
 441         help
 442           Very large kernels can cause linker branch stubs to be generated by
 443           code in head_64.S, which moves the head text sections out of their
 444           specified location. This option can work around the problem.
 445
 446           If unsure, say "N".
 447
 448 config DISABLE_MPROFILE_KERNEL
 449         bool "Disable use of mprofile-kernel for kernel tracing"
 450         depends on PPC64 && CPU_LITTLE_ENDIAN
 451         default y
 452         help
 453           Selecting this options disables use of the mprofile-kernel ABI for
 454           kernel tracing. That will cause options such as live patching
 455           (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
 456           be disabled also.
 457
 458           If you have a toolchain which supports mprofile-kernel, then you can
 459           disable this. Otherwise leave it enabled. If you're not sure, say
 460           "Y".
 461
 462 config MPROFILE_KERNEL
 463         depends on PPC64 && CPU_LITTLE_ENDIAN
 464         def_bool !DISABLE_MPROFILE_KERNEL
 465
 466 config IOMMU_HELPER
 467         def_bool PPC64
 468
 469 config SWIOTLB
 470         bool "SWIOTLB support"
 471         default n
 472         select IOMMU_HELPER
 473         ---help---
 474           Support for IO bounce buffering for systems without an IOMMU.
 475           This allows us to DMA to the full physical address space on
 476           platforms where the size of a physical address is larger
 477           than the bus address.  Not all platforms support this.
 478
 479 config HOTPLUG_CPU
 480         bool "Support for enabling/disabling CPUs"
 481         depends on SMP && (PPC_PSERIES || \
 482         PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 483         ---help---
 484           Say Y here to be able to disable and re-enable individual
 485           CPUs at runtime on SMP machines.
 486
 487           Say N if you are unsure.
 488
 489 config ARCH_CPU_PROBE_RELEASE
 490         def_bool y
 491         depends on HOTPLUG_CPU
 492
 493 config ARCH_ENABLE_MEMORY_HOTPLUG
 494         def_bool y
 495
 496 config ARCH_HAS_WALK_MEMORY
 497         def_bool y
 498
 499 config ARCH_ENABLE_MEMORY_HOTREMOVE
 500         def_bool y
 501
 502 config PPC64_SUPPORTS_MEMORY_FAILURE
 503         bool "Add support for memory hwpoison"
 504         depends on PPC_BOOK3S_64
 505         default "y" if PPC_POWERNV
 506         select ARCH_SUPPORTS_MEMORY_FAILURE
 507
 508 config KEXEC
 509         bool "kexec system call"
 510         depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
 511         select KEXEC_CORE
 512         help
 513           kexec is a system call that implements the ability to shutdown your
 514           current kernel, and to start another kernel.  It is like a reboot
 515           but it is independent of the system firmware.   And like a reboot
 516           you can start any kernel with it, not just Linux.
 517
 518           The name comes from the similarity to the exec system call.
 519
 520           It is an ongoing process to be certain the hardware in a machine
 521           is properly shutdown, so do not be surprised if this code does not
 522           initially work for you.  As of this writing the exact hardware
 523           interface is strongly in flux, so no good recommendation can be
 524           made.
 525
 526 config KEXEC_FILE
 527         bool "kexec file based system call"
 528         select KEXEC_CORE
 529         select HAVE_IMA_KEXEC
 530         select BUILD_BIN2C
 531         depends on PPC64
 532         depends on CRYPTO=y
 533         depends on CRYPTO_SHA256=y
 534         help
 535           This is a new version of the kexec system call. This call is
 536           file based and takes in file descriptors as system call arguments
 537           for kernel and initramfs as opposed to a list of segments as is the
 538           case for the older kexec call.
 539
 540 config RELOCATABLE
 541         bool "Build a relocatable kernel"
 542         depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
 543         select NONSTATIC_KERNEL
 544         select MODULE_REL_CRCS if MODVERSIONS
 545         help
 546           This builds a kernel image that is capable of running at the
 547           location the kernel is loaded at. For ppc32, there is no any
 548           alignment restrictions, and this feature is a superset of
 549           DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 550           16k-aligned base address. The kernel is linked as a
 551           position-independent executable (PIE) and contains dynamic relocations
 552           which are processed early in the bootup process.
 553
 554           One use is for the kexec on panic case where the recovery kernel
 555           must live at a different physical address than the primary
 556           kernel.
 557
 558           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 559           it has been loaded at and the compile time physical addresses
 560           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 561           setting can still be useful to bootwrappers that need to know the
 562           load address of the kernel (eg. u-boot/mkimage).
 563
 564 config RELOCATABLE_TEST
 565         bool "Test relocatable kernel"
 566         depends on (PPC64 && RELOCATABLE)
 567         default n
 568         help
 569           This runs the relocatable kernel at the address it was initially
 570           loaded at, which tends to be non-zero and therefore test the
 571           relocation code.
 572
 573 config CRASH_DUMP
 574         bool "Build a dump capture kernel"
 575         depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
 576         select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
 577         help
 578           Build a kernel suitable for use as a dump capture kernel.
 579           The same kernel binary can be used as production kernel and dump
 580           capture kernel.
 581
 582 config FA_DUMP
 583         bool "Firmware-assisted dump"
 584         depends on PPC64 && PPC_RTAS
 585         select CRASH_CORE
 586         select CRASH_DUMP
 587         help
 588           A robust mechanism to get reliable kernel crash dump with
 589           assistance from firmware. This approach does not use kexec,
 590           instead firmware assists in booting the capture kernel
 591           while preserving memory contents. Firmware-assisted dump
 592           is meant to be a kdump replacement offering robustness and
 593           speed not possible without system firmware assistance.
 594
 595           If unsure, say "N"
 596
 597 config IRQ_ALL_CPUS
 598         bool "Distribute interrupts on all CPUs by default"
 599         depends on SMP
 600         help
 601           This option gives the kernel permission to distribute IRQs across
 602           multiple CPUs.  Saying N here will route all IRQs to the first
 603           CPU.  Generally saying Y is safe, although some problems have been
 604           reported with SMP Power Macintoshes with this option enabled.
 605
 606 config NUMA
 607         bool "NUMA support"
 608         depends on PPC64
 609         default y if SMP && PPC_PSERIES
 610
 611 config NODES_SHIFT
 612         int
 613         default "8" if PPC64
 614         default "4"
 615         depends on NEED_MULTIPLE_NODES
 616
 617 config USE_PERCPU_NUMA_NODE_ID
 618         def_bool y
 619         depends on NUMA
 620
 621 config HAVE_MEMORYLESS_NODES
 622         def_bool y
 623         depends on NUMA
 624
 625 config ARCH_SELECT_MEMORY_MODEL
 626         def_bool y
 627         depends on PPC64
 628
 629 config ARCH_FLATMEM_ENABLE
 630         def_bool y
 631         depends on (PPC64 && !NUMA) || PPC32
 632
 633 config ARCH_SPARSEMEM_ENABLE
 634         def_bool y
 635         depends on PPC64
 636         select SPARSEMEM_VMEMMAP_ENABLE
 637
 638 config ARCH_SPARSEMEM_DEFAULT
 639         def_bool y
 640         depends on PPC_BOOK3S_64
 641
 642 config SYS_SUPPORTS_HUGETLBFS
 643         bool
 644
 645 config ILLEGAL_POINTER_VALUE
 646         hex
 647         # This is roughly half way between the top of user space and the bottom
 648         # of kernel space, which seems about as good as we can get.
 649         default 0x5deadbeef0000000 if PPC64
 650         default 0
 651
 652 source "mm/Kconfig"
 653
 654 config ARCH_MEMORY_PROBE
 655         def_bool y
 656         depends on MEMORY_HOTPLUG
 657
 658 # Some NUMA nodes have memory ranges that span
 659 # other nodes.  Even though a pfn is valid and
 660 # between a node's start and end pfns, it may not
 661 # reside on that node.  See memmap_init_zone()
 662 # for details.
 663 config NODES_SPAN_OTHER_NODES
 664         def_bool y
 665         depends on NEED_MULTIPLE_NODES
 666
 667 config STDBINUTILS
 668         bool "Using standard binutils settings"
 669         depends on 44x
 670         default y
 671         help
 672           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 673           Note, that kernel will be able to run only those applications,
 674           which had been compiled using binutils later than 2.17.50.0.3 with
 675           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 676           the older binutils, you can patch them with a trivial patch, which
 677           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 678
 679 choice
 680         prompt "Page size"
 681         default PPC_4K_PAGES
 682         help
 683           Select the kernel logical page size. Increasing the page size
 684           will reduce software overhead at each page boundary, allow
 685           hardware prefetch mechanisms to be more effective, and allow
 686           larger dma transfers increasing IO efficiency and reducing
 687           overhead. However the utilization of memory will increase.
 688           For example, each cached file will using a multiple of the
 689           page size to hold its contents and the difference between the
 690           end of file and the end of page is wasted.
 691
 692           Some dedicated systems, such as software raid serving with
 693           accelerated calculations, have shown significant increases.
 694
 695           If you configure a 64 bit kernel for 64k pages but the
 696           processor does not support them, then the kernel will simulate
 697           them with 4k pages, loading them on demand, but with the
 698           reduced software overhead and larger internal fragmentation.
 699           For the 32 bit kernel, a large page option will not be offered
 700           unless it is supported by the configured processor.
 701
 702           If unsure, choose 4K_PAGES.
 703
 704 config PPC_4K_PAGES
 705         bool "4k page size"
 706         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 707
 708 config PPC_16K_PAGES
 709         bool "16k page size"
 710         depends on 44x || PPC_8xx
 711
 712 config PPC_64K_PAGES
 713         bool "64k page size"
 714         depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
 715         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 716
 717 config PPC_256K_PAGES
 718         bool "256k page size"
 719         depends on 44x && !STDBINUTILS
 720         help
 721           Make the page size 256k.
 722
 723           As the ELF standard only requires alignment to support page
 724           sizes up to 64k, you will need to compile all of your user
 725           space applications with a non-standard binutils settings
 726           (see the STDBINUTILS description for details).
 727
 728           Say N unless you know what you are doing.
 729
 730 endchoice
 731
 732 config THREAD_SHIFT
 733         int "Thread shift" if EXPERT
 734         range 13 15
 735         default "15" if PPC_256K_PAGES
 736         default "14" if PPC64
 737         default "13"
 738         help
 739           Used to define the stack size. The default is almost always what you
 740           want. Only change this if you know what you are doing.
 741
 742 config FORCE_MAX_ZONEORDER
 743         int "Maximum zone order"
 744         range 8 9 if PPC64 && PPC_64K_PAGES
 745         default "9" if PPC64 && PPC_64K_PAGES
 746         range 13 13 if PPC64 && !PPC_64K_PAGES
 747         default "13" if PPC64 && !PPC_64K_PAGES
 748         range 9 64 if PPC32 && PPC_16K_PAGES
 749         default "9" if PPC32 && PPC_16K_PAGES
 750         range 7 64 if PPC32 && PPC_64K_PAGES
 751         default "7" if PPC32 && PPC_64K_PAGES
 752         range 5 64 if PPC32 && PPC_256K_PAGES
 753         default "5" if PPC32 && PPC_256K_PAGES
 754         range 11 64
 755         default "11"
 756         help
 757           The kernel memory allocator divides physically contiguous memory
 758           blocks into "zones", where each zone is a power of two number of
 759           pages.  This option selects the largest power of two that the kernel
 760           keeps in the memory allocator.  If you need to allocate very large
 761           blocks of physically contiguous memory, then you may need to
 762           increase this value.
 763
 764           This config option is actually maximum order plus one. For example,
 765           a value of 11 means that the largest free memory block is 2^10 pages.
 766
 767           The page size is not necessarily 4KB.  For example, on 64-bit
 768           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 769           this in mind when choosing a value for this option.
 770
 771 config PPC_SUBPAGE_PROT
 772         bool "Support setting protections for 4k subpages"
 773         depends on PPC_STD_MMU_64 && PPC_64K_PAGES
 774         help
 775           This option adds support for a system call to allow user programs
 776           to set access permissions (read/write, readonly, or no access)
 777           on the 4k subpages of each 64k page.
 778
 779 config PPC_COPRO_BASE
 780         bool
 781         default n
 782
 783 config SCHED_SMT
 784         bool "SMT (Hyperthreading) scheduler support"
 785         depends on PPC64 && SMP
 786         help
 787           SMT scheduler support improves the CPU scheduler's decision making
 788           when dealing with POWER5 cpus at a cost of slightly increased
 789           overhead in some places. If unsure say N here.
 790
 791 config PPC_DENORMALISATION
 792         bool "PowerPC denormalisation exception handling"
 793         depends on PPC_BOOK3S_64
 794         default "y" if PPC_POWERNV
 795         ---help---
 796           Add support for handling denormalisation of single precision
 797           values.  Useful for bare metal only.  If unsure say Y here.
 798
 799 config CMDLINE_BOOL
 800         bool "Default bootloader kernel arguments"
 801
 802 config CMDLINE
 803         string "Initial kernel command string"
 804         depends on CMDLINE_BOOL
 805         default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
 806         help
 807           On some platforms, there is currently no way for the boot loader to
 808           pass arguments to the kernel. For these platforms, you can supply
 809           some command-line options at build time by entering them here.  In
 810           most cases you will need to specify the root device here.
 811
 812 config CMDLINE_FORCE
 813         bool "Always use the default kernel command string"
 814         depends on CMDLINE_BOOL
 815         help
 816           Always use the default kernel command string, even if the boot
 817           loader passes other arguments to the kernel.
 818           This is useful if you cannot or don't want to change the
 819           command-line options your boot loader passes to the kernel.
 820
 821 config EXTRA_TARGETS
 822         string "Additional default image types"
 823         help
 824           List additional targets to be built by the bootwrapper here (separated
 825           by spaces).  This is useful for targets that depend of device tree
 826           files in the .dts directory.
 827
 828           Targets in this list will be build as part of the default build
 829           target, or when the user does a 'make zImage' or a
 830           'make zImage.initrd'.
 831
 832           If unsure, leave blank
 833
 834 config ARCH_WANTS_FREEZER_CONTROL
 835         def_bool y
 836         depends on ADB_PMU
 837
 838 source kernel/power/Kconfig
 839
 840 config SECCOMP
 841         bool "Enable seccomp to safely compute untrusted bytecode"
 842         depends on PROC_FS
 843         default y
 844         help
 845           This kernel feature is useful for number crunching applications
 846           that may need to compute untrusted bytecode during their
 847           execution. By using pipes or other transports made available to
 848           the process as file descriptors supporting the read/write
 849           syscalls, it's possible to isolate those applications in
 850           their own address space using seccomp. Once seccomp is
 851           enabled via /proc/<pid>/seccomp, it cannot be disabled
 852           and the task is only allowed to execute a few safe syscalls
 853           defined by each seccomp mode.
 854
 855           If unsure, say Y. Only embedded should say N here.
 856
 857 endmenu
 858
 859 config ISA_DMA_API
 860         bool
 861         default PCI
 862
 863 menu "Bus options"
 864
 865 config ISA
 866         bool "Support for ISA-bus hardware"
 867         depends on PPC_CHRP
 868         select PPC_I8259
 869         help
 870           Find out whether you have ISA slots on your motherboard.  ISA is the
 871           name of a bus system, i.e. the way the CPU talks to the other stuff
 872           inside your box.  If you have an Apple machine, say N here; if you
 873           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
 874           embedded board, consult your board documentation.
 875
 876 config ZONE_DMA
 877         bool
 878         default y
 879
 880 config NEED_DMA_MAP_STATE
 881         def_bool (PPC64 || NOT_COHERENT_CACHE)
 882
 883 config NEED_SG_DMA_LENGTH
 884         def_bool y
 885
 886 config GENERIC_ISA_DMA
 887         bool
 888         depends on ISA_DMA_API
 889         default y
 890
 891 config PPC_INDIRECT_PCI
 892         bool
 893         depends on PCI
 894         default y if 40x || 44x
 895         default n
 896
 897 config EISA
 898         bool
 899
 900 config SBUS
 901         bool
 902
 903 config FSL_SOC
 904         bool
 905
 906 config FSL_PCI
 907         bool
 908         select PPC_INDIRECT_PCI
 909         select PCI_QUIRKS
 910
 911 config FSL_PMC
 912         bool
 913         default y
 914         depends on SUSPEND && (PPC_85xx || PPC_86xx)
 915         help
 916           Freescale MPC85xx/MPC86xx power management controller support
 917           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
 918
 919 config PPC4xx_CPM
 920         bool
 921         default y
 922         depends on SUSPEND && (44x || 40x)
 923         help
 924           PPC4xx Clock Power Management (CPM) support (suspend/resume).
 925           It also enables support for two different idle states (idle-wait
 926           and idle-doze).
 927
 928 config 4xx_SOC
 929         bool
 930
 931 config FSL_LBC
 932         bool "Freescale Local Bus support"
 933         help
 934           Enables reporting of errors from the Freescale local bus
 935           controller.  Also contains some common code used by
 936           drivers for specific local bus peripherals.
 937
 938 config FSL_GTM
 939         bool
 940         depends on PPC_83xx || QUICC_ENGINE || CPM2
 941         help
 942           Freescale General-purpose Timers support
 943
 944 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
 945 config MCA
 946         bool
 947
 948 # Platforms that what PCI turned unconditionally just do select PCI
 949 # in their config node.  Platforms that want to choose at config
 950 # time should select PPC_PCI_CHOICE
 951 config PPC_PCI_CHOICE
 952         bool
 953
 954 config PCI
 955         bool "PCI support" if PPC_PCI_CHOICE
 956         default y if !40x && !CPM2 && !8xx && !PPC_83xx \
 957                 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
 958         default PCI_QSPAN if !4xx && !CPM2 && 8xx
 959         select GENERIC_PCI_IOMAP
 960         help
 961           Find out whether your system includes a PCI bus. PCI is the name of
 962           a bus system, i.e. the way the CPU talks to the other stuff inside
 963           your box.  If you say Y here, the kernel will include drivers and
 964           infrastructure code to support PCI bus devices.
 965
 966 config PCI_DOMAINS
 967         def_bool PCI
 968
 969 config PCI_SYSCALL
 970         def_bool PCI
 971
 972 config PCI_QSPAN
 973         bool "QSpan PCI"
 974         depends on !4xx && !CPM2 && 8xx
 975         select PPC_I8259
 976         help
 977           Say Y here if you have a system based on a Motorola 8xx-series
 978           embedded processor with a QSPAN PCI interface, otherwise say N.
 979
 980 config PCI_8260
 981         bool
 982         depends on PCI && 8260
 983         select PPC_INDIRECT_PCI
 984         default y
 985
 986 source "drivers/pci/Kconfig"
 987
 988 source "drivers/pcmcia/Kconfig"
 989
 990 config HAS_RAPIDIO
 991         bool
 992         default n
 993
 994 config RAPIDIO
 995         tristate "RapidIO support"
 996         depends on HAS_RAPIDIO || PCI
 997         help
 998           If you say Y here, the kernel will include drivers and
 999           infrastructure code to support RapidIO interconnect devices.
1000
1001 config FSL_RIO
1002         bool "Freescale Embedded SRIO Controller support"
1003         depends on RAPIDIO = y && HAS_RAPIDIO
1004         default "n"
1005         ---help---
1006           Include support for RapidIO controller on Freescale embedded
1007           processors (MPC8548, MPC8641, etc).
1008
1009 source "drivers/rapidio/Kconfig"
1010
1011 endmenu
1012
1013 config NONSTATIC_KERNEL
1014         bool
1015         default n
1016
1017 menu "Advanced setup"
1018         depends on PPC32
1019
1020 config ADVANCED_OPTIONS
1021         bool "Prompt for advanced kernel configuration options"
1022         help
1023           This option will enable prompting for a variety of advanced kernel
1024           configuration options.  These options can cause the kernel to not
1025           work if they are set incorrectly, but can be used to optimize certain
1026           aspects of kernel memory management.
1027
1028           Unless you know what you are doing, say N here.
1029
1030 comment "Default settings for advanced configuration options are used"
1031         depends on !ADVANCED_OPTIONS
1032
1033 config LOWMEM_SIZE_BOOL
1034         bool "Set maximum low memory"
1035         depends on ADVANCED_OPTIONS
1036         help
1037           This option allows you to set the maximum amount of memory which
1038           will be used as "low memory", that is, memory which the kernel can
1039           access directly, without having to set up a kernel virtual mapping.
1040           This can be useful in optimizing the layout of kernel virtual
1041           memory.
1042
1043           Say N here unless you know what you are doing.
1044
1045 config LOWMEM_SIZE
1046         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1047         default "0x30000000"
1048
1049 config LOWMEM_CAM_NUM_BOOL
1050         bool "Set number of CAMs to use to map low memory"
1051         depends on ADVANCED_OPTIONS && FSL_BOOKE
1052         help
1053           This option allows you to set the maximum number of CAM slots that
1054           will be used to map low memory.  There are a limited number of slots
1055           available and even more limited number that will fit in the L1 MMU.
1056           However, using more entries will allow mapping more low memory.  This
1057           can be useful in optimizing the layout of kernel virtual memory.
1058
1059           Say N here unless you know what you are doing.
1060
1061 config LOWMEM_CAM_NUM
1062         depends on FSL_BOOKE
1063         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1064         default 3
1065
1066 config DYNAMIC_MEMSTART
1067         bool "Enable page aligned dynamic load address for kernel"
1068         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1069         select NONSTATIC_KERNEL
1070         help
1071           This option enables the kernel to be loaded at any page aligned
1072           physical address. The kernel creates a mapping from KERNELBASE to
1073           the address where the kernel is loaded. The page size here implies
1074           the TLB page size of the mapping for kernel on the particular platform.
1075           Please refer to the init code for finding the TLB page size.
1076
1077           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1078           kernel image, where the only restriction is the page aligned kernel
1079           load address. When this option is enabled, the compile time physical
1080           address CONFIG_PHYSICAL_START is ignored.
1081
1082           This option is overridden by CONFIG_RELOCATABLE
1083
1084 config PAGE_OFFSET_BOOL
1085         bool "Set custom page offset address"
1086         depends on ADVANCED_OPTIONS
1087         help
1088           This option allows you to set the kernel virtual address at which
1089           the kernel will map low memory.  This can be useful in optimizing
1090           the virtual memory layout of the system.
1091
1092           Say N here unless you know what you are doing.
1093
1094 config PAGE_OFFSET
1095         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1096         default "0xc0000000"
1097
1098 config KERNEL_START_BOOL
1099         bool "Set custom kernel base address"
1100         depends on ADVANCED_OPTIONS
1101         help
1102           This option allows you to set the kernel virtual address at which
1103           the kernel will be loaded.  Normally this should match PAGE_OFFSET
1104           however there are times (like kdump) that one might not want them
1105           to be the same.
1106
1107           Say N here unless you know what you are doing.
1108
1109 config KERNEL_START
1110         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1111         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1112         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1113         default "0xc0000000"
1114
1115 config PHYSICAL_START_BOOL
1116         bool "Set physical address where the kernel is loaded"
1117         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1118         help
1119           This gives the physical address where the kernel is loaded.
1120
1121           Say N here unless you know what you are doing.
1122
1123 config PHYSICAL_START
1124         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1125         default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
1126         default "0x00000000"
1127
1128 config PHYSICAL_ALIGN
1129         hex
1130         default "0x04000000" if FSL_BOOKE
1131         help
1132           This value puts the alignment restrictions on physical address
1133           where kernel is loaded and run from. Kernel is compiled for an
1134           address which meets above alignment restriction.
1135
1136 config TASK_SIZE_BOOL
1137         bool "Set custom user task size"
1138         depends on ADVANCED_OPTIONS
1139         help
1140           This option allows you to set the amount of virtual address space
1141           allocated to user tasks.  This can be useful in optimizing the
1142           virtual memory layout of the system.
1143
1144           Say N here unless you know what you are doing.
1145
1146 config TASK_SIZE
1147         hex "Size of user task space" if TASK_SIZE_BOOL
1148         default "0x80000000" if PPC_8xx
1149         default "0xc0000000"
1150
1151 config CONSISTENT_SIZE_BOOL
1152         bool "Set custom consistent memory pool size"
1153         depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1154         help
1155           This option allows you to set the size of the
1156           consistent memory pool.  This pool of virtual memory
1157           is used to make consistent memory allocations.
1158
1159 config CONSISTENT_SIZE
1160         hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1161         default "0x00200000" if NOT_COHERENT_CACHE
1162
1163 config PIN_TLB
1164         bool "Pinned Kernel TLBs (860 ONLY)"
1165         depends on ADVANCED_OPTIONS && 8xx
1166
1167 config PIN_TLB_IMMR
1168         bool "Pinned TLB for IMMR"
1169         depends on PIN_TLB
1170         default y
1171 endmenu
1172
1173 if PPC64
1174 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1175 config PAGE_OFFSET
1176         hex
1177         default "0xc000000000000000"
1178 config KERNEL_START
1179         hex
1180         default "0xc000000000000000"
1181 config PHYSICAL_START
1182         hex
1183         default "0x00000000"
1184 endif
1185
1186 config  ARCH_RANDOM
1187         def_bool n
1188
1189 source "net/Kconfig"
1190
1191 source "drivers/Kconfig"
1192
1193 source "fs/Kconfig"
1194
1195 source "lib/Kconfig"
1196
1197 source "arch/powerpc/Kconfig.debug"
1198
1199 source "security/Kconfig"
1200
1201 source "crypto/Kconfig"
1202
1203 config PPC_LIB_RHEAP
1204         bool
1205
1206 source "arch/powerpc/kvm/Kconfig"
1207
1208 source "kernel/livepatch/Kconfig"