arch/powerpc/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 source "arch/powerpc/platforms/Kconfig.cputype"
   3
   4 config 32BIT
   5         bool
   6         default y if PPC32
   7
   8 config 64BIT
   9         bool
  10         default y if PPC64
  11
  12 config MMU
  13         bool
  14         default y
  15
  16 config ARCH_MMAP_RND_BITS_MAX
  17         # On Book3S 64, the default virtual address space for 64-bit processes
  18         # is 2^47 (128TB). As a maximum, allow randomisation to consume up to
  19         # 32T of address space (2^45), which should ensure a reasonable gap
  20         # between bottom-up and top-down allocations for applications that
  21         # consume "normal" amounts of address space. Book3S 64 only supports 64K
  22         # and 4K page sizes.
  23         default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K)
  24         default 33 if PPC_BOOK3S_64                  # 33 = 45 (32T) - 12 (4K)
  25         #
  26         # On all other 64-bit platforms (currently only Book3E), the virtual
  27         # address space is 2^46 (64TB). Allow randomisation to consume up to 16T
  28         # of address space (2^44). Only 4K page sizes are supported.
  29         default 32 if 64BIT     # 32 = 44 (16T) - 12 (4K)
  30         #
  31         # For 32-bit, use the compat values, as they're the same.
  32         default ARCH_MMAP_RND_COMPAT_BITS_MAX
  33
  34 config ARCH_MMAP_RND_BITS_MIN
  35         # Allow randomisation to consume up to 1GB of address space (2^30).
  36         default 14 if 64BIT && PPC_64K_PAGES    # 14 = 30 (1GB) - 16 (64K)
  37         default 18 if 64BIT                     # 18 = 30 (1GB) - 12 (4K)
  38         #
  39         # For 32-bit, use the compat values, as they're the same.
  40         default ARCH_MMAP_RND_COMPAT_BITS_MIN
  41
  42 config ARCH_MMAP_RND_COMPAT_BITS_MAX
  43         # Total virtual address space for 32-bit processes is 2^31 (2GB).
  44         # Allow randomisation to consume up to 512MB of address space (2^29).
  45         default 11 if PPC_256K_PAGES    # 11 = 29 (512MB) - 18 (256K)
  46         default 13 if PPC_64K_PAGES     # 13 = 29 (512MB) - 16 (64K)
  47         default 15 if PPC_16K_PAGES     # 15 = 29 (512MB) - 14 (16K)
  48         default 17                      # 17 = 29 (512MB) - 12 (4K)
  49
  50 config ARCH_MMAP_RND_COMPAT_BITS_MIN
  51         # Total virtual address space for 32-bit processes is 2^31 (2GB).
  52         # Allow randomisation to consume up to 8MB of address space (2^23).
  53         default 5 if PPC_256K_PAGES     #  5 = 23 (8MB) - 18 (256K)
  54         default 7 if PPC_64K_PAGES      #  7 = 23 (8MB) - 16 (64K)
  55         default 9 if PPC_16K_PAGES      #  9 = 23 (8MB) - 14 (16K)
  56         default 11                      # 11 = 23 (8MB) - 12 (4K)
  57
  58 config HAVE_SETUP_PER_CPU_AREA
  59         def_bool PPC64
  60
  61 config NEED_PER_CPU_EMBED_FIRST_CHUNK
  62         def_bool PPC64
  63
  64 config NR_IRQS
  65         int "Number of virtual interrupt numbers"
  66         range 32 32768
  67         default "512"
  68         help
  69           This defines the number of virtual interrupt numbers the kernel
  70           can manage. Virtual interrupt numbers are what you see in
  71           /proc/interrupts. If you configure your system to have too few,
  72           drivers will fail to load or worse - handle with care.
  73
  74 config NMI_IPI
  75         bool
  76         depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR)
  77         default y
  78
  79 config PPC_WATCHDOG
  80         bool
  81         depends on HARDLOCKUP_DETECTOR
  82         depends on HAVE_HARDLOCKUP_DETECTOR_ARCH
  83         default y
  84         help
  85           This is a placeholder when the powerpc hardlockup detector
  86           watchdog is selected (arch/powerpc/kernel/watchdog.c). It is
  87           seleted via the generic lockup detector menu which is why we
  88           have no standalone config option for it here.
  89
  90 config STACKTRACE_SUPPORT
  91         bool
  92         default y
  93
  94 config TRACE_IRQFLAGS_SUPPORT
  95         bool
  96         default y
  97
  98 config LOCKDEP_SUPPORT
  99         bool
 100         default y
 101
 102 config GENERIC_LOCKBREAK
 103         bool
 104         default y
 105         depends on SMP && PREEMPTION
 106
 107 config GENERIC_HWEIGHT
 108         bool
 109         default y
 110
 111 config PPC
 112         bool
 113         default y
 114         #
 115         # Please keep this list sorted alphabetically.
 116         #
 117         select ARCH_32BIT_OFF_T if PPC32
 118         select ARCH_HAS_DEBUG_VIRTUAL
 119         select ARCH_HAS_DEVMEM_IS_ALLOWED
 120         select ARCH_HAS_ELF_RANDOMIZE
 121         select ARCH_HAS_FORTIFY_SOURCE
 122         select ARCH_HAS_GCOV_PROFILE_ALL
 123         select ARCH_HAS_KCOV
 124         select ARCH_HAS_HUGEPD                  if HUGETLB_PAGE
 125         select ARCH_HAS_MEMREMAP_COMPAT_ALIGN
 126         select ARCH_HAS_MMIOWB                  if PPC64
 127         select ARCH_HAS_PHYS_TO_DMA
 128         select ARCH_HAS_PMEM_API
 129         select ARCH_HAS_PTE_DEVMAP              if PPC_BOOK3S_64
 130         select ARCH_HAS_PTE_SPECIAL
 131         select ARCH_HAS_MEMBARRIER_CALLBACKS
 132         select ARCH_HAS_SCALED_CPUTIME          if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
 133         select ARCH_HAS_STRICT_KERNEL_RWX       if (PPC32 && !HIBERNATION)
 134         select ARCH_HAS_TICK_BROADCAST          if GENERIC_CLOCKEVENTS_BROADCAST
 135         select ARCH_HAS_UACCESS_FLUSHCACHE
 136         select ARCH_HAS_UACCESS_MCSAFE          if PPC64
 137         select ARCH_HAS_UBSAN_SANITIZE_ALL
 138         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 139         select ARCH_KEEP_MEMBLOCK
 140         select ARCH_MIGHT_HAVE_PC_PARPORT
 141         select ARCH_MIGHT_HAVE_PC_SERIO
 142         select ARCH_OPTIONAL_KERNEL_RWX         if ARCH_HAS_STRICT_KERNEL_RWX
 143         select ARCH_SUPPORTS_ATOMIC_RMW
 144         select ARCH_USE_BUILTIN_BSWAP
 145         select ARCH_USE_CMPXCHG_LOCKREF         if PPC64
 146         select ARCH_WANT_IPC_PARSE_VERSION
 147         select ARCH_WEAK_RELEASE_ACQUIRE
 148         select BINFMT_ELF
 149         select BUILDTIME_TABLE_SORT
 150         select CLONE_BACKWARDS
 151         select DCACHE_WORD_ACCESS               if PPC64 && CPU_LITTLE_ENDIAN
 152         select DYNAMIC_FTRACE                   if FUNCTION_TRACER
 153         select EDAC_ATOMIC_SCRUB
 154         select EDAC_SUPPORT
 155         select GENERIC_ATOMIC64                 if PPC32
 156         select GENERIC_CLOCKEVENTS
 157         select GENERIC_CLOCKEVENTS_BROADCAST    if SMP
 158         select GENERIC_CMOS_UPDATE
 159         select GENERIC_CPU_AUTOPROBE
 160         select GENERIC_CPU_VULNERABILITIES      if PPC_BARRIER_NOSPEC
 161         select GENERIC_EARLY_IOREMAP
 162         select GENERIC_IRQ_SHOW
 163         select GENERIC_IRQ_SHOW_LEVEL
 164         select GENERIC_PCI_IOMAP                if PCI
 165         select GENERIC_SMP_IDLE_THREAD
 166         select GENERIC_STRNCPY_FROM_USER
 167         select GENERIC_STRNLEN_USER
 168         select GENERIC_TIME_VSYSCALL
 169         select HAVE_ARCH_AUDITSYSCALL
 170         select HAVE_ARCH_HUGE_VMAP              if PPC_BOOK3S_64 && PPC_RADIX_MMU
 171         select HAVE_ARCH_JUMP_LABEL
 172         select HAVE_ARCH_KASAN                  if PPC32
 173         select HAVE_ARCH_KASAN_VMALLOC          if PPC32
 174         select HAVE_ARCH_KGDB
 175         select HAVE_ARCH_MMAP_RND_BITS
 176         select HAVE_ARCH_MMAP_RND_COMPAT_BITS   if COMPAT
 177         select HAVE_ARCH_NVRAM_OPS
 178         select HAVE_ARCH_SECCOMP_FILTER
 179         select HAVE_ARCH_TRACEHOOK
 180         select HAVE_ASM_MODVERSIONS
 181         select HAVE_C_RECORDMCOUNT
 182         select HAVE_CBPF_JIT                    if !PPC64
 183         select HAVE_STACKPROTECTOR              if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
 184         select HAVE_STACKPROTECTOR              if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
 185         select HAVE_CONTEXT_TRACKING            if PPC64
 186         select HAVE_TIF_NOHZ                    if PPC64
 187         select HAVE_COPY_THREAD_TLS
 188         select HAVE_DEBUG_KMEMLEAK
 189         select HAVE_DEBUG_STACKOVERFLOW
 190         select HAVE_DYNAMIC_FTRACE
 191         select HAVE_DYNAMIC_FTRACE_WITH_REGS    if MPROFILE_KERNEL
 192         select HAVE_EBPF_JIT                    if PPC64
 193         select HAVE_EFFICIENT_UNALIGNED_ACCESS  if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
 194         select HAVE_FAST_GUP
 195         select HAVE_FTRACE_MCOUNT_RECORD
 196         select HAVE_FUNCTION_ERROR_INJECTION
 197         select HAVE_FUNCTION_GRAPH_TRACER
 198         select HAVE_FUNCTION_TRACER
 199         select HAVE_GCC_PLUGINS                 if GCC_VERSION >= 50200   # plugin support on gcc <= 5.1 is buggy on PPC
 200         select HAVE_HW_BREAKPOINT               if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
 201         select HAVE_IDE
 202         select HAVE_IOREMAP_PROT
 203         select HAVE_IRQ_EXIT_ON_IRQ_STACK
 204         select HAVE_KERNEL_GZIP
 205         select HAVE_KERNEL_LZMA                 if DEFAULT_UIMAGE
 206         select HAVE_KERNEL_LZO                  if DEFAULT_UIMAGE
 207         select HAVE_KERNEL_XZ                   if PPC_BOOK3S || 44x
 208         select HAVE_KPROBES
 209         select HAVE_KPROBES_ON_FTRACE
 210         select HAVE_KRETPROBES
 211         select HAVE_LD_DEAD_CODE_DATA_ELIMINATION
 212         select HAVE_LIVEPATCH                   if HAVE_DYNAMIC_FTRACE_WITH_REGS
 213         select HAVE_MEMBLOCK_NODE_MAP
 214         select HAVE_MOD_ARCH_SPECIFIC
 215         select HAVE_NMI                         if PERF_EVENTS || (PPC64 && PPC_BOOK3S)
 216         select HAVE_HARDLOCKUP_DETECTOR_ARCH    if (PPC64 && PPC_BOOK3S)
 217         select HAVE_OPROFILE
 218         select HAVE_OPTPROBES                   if PPC64
 219         select HAVE_PERF_EVENTS
 220         select HAVE_PERF_EVENTS_NMI             if PPC64
 221         select HAVE_HARDLOCKUP_DETECTOR_PERF    if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
 222         select HAVE_PERF_REGS
 223         select HAVE_PERF_USER_STACK_DUMP
 224         select MMU_GATHER_RCU_TABLE_FREE
 225         select MMU_GATHER_PAGE_SIZE
 226         select HAVE_REGS_AND_STACK_ACCESS_API
 227         select HAVE_RELIABLE_STACKTRACE         if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
 228         select HAVE_SYSCALL_TRACEPOINTS
 229         select HAVE_VIRT_CPU_ACCOUNTING
 230         select HAVE_IRQ_TIME_ACCOUNTING
 231         select HAVE_RSEQ
 232         select IOMMU_HELPER                     if PPC64
 233         select IRQ_DOMAIN
 234         select IRQ_FORCED_THREADING
 235         select MODULES_USE_ELF_RELA
 236         select NEED_DMA_MAP_STATE               if PPC64 || NOT_COHERENT_CACHE
 237         select NEED_SG_DMA_LENGTH
 238         select OF
 239         select OF_DMA_DEFAULT_COHERENT          if !NOT_COHERENT_CACHE
 240         select OF_EARLY_FLATTREE
 241         select OLD_SIGACTION                    if PPC32
 242         select OLD_SIGSUSPEND
 243         select PCI_DOMAINS                      if PCI
 244         select PCI_SYSCALL                      if PCI
 245         select PPC_DAWR                         if PPC64
 246         select RTC_LIB
 247         select SPARSE_IRQ
 248         select SYSCTL_EXCEPTION_TRACE
 249         select THREAD_INFO_IN_TASK
 250         select VIRT_TO_BUS                      if !PPC64
 251         #
 252         # Please keep this list sorted alphabetically.
 253         #
 254
 255 config PPC_BARRIER_NOSPEC
 256         bool
 257         default y
 258         depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
 259
 260 config EARLY_PRINTK
 261         bool
 262         default y
 263
 264 config PANIC_TIMEOUT
 265         int
 266         default 180
 267
 268 config COMPAT
 269         bool "Enable support for 32bit binaries"
 270         depends on PPC64
 271         default y if !CPU_LITTLE_ENDIAN
 272         select COMPAT_BINFMT_ELF
 273         select ARCH_WANT_OLD_COMPAT_IPC
 274         select COMPAT_OLD_SIGACTION
 275
 276 config SYSVIPC_COMPAT
 277         bool
 278         depends on COMPAT && SYSVIPC
 279         default y
 280
 281 config SCHED_OMIT_FRAME_POINTER
 282         bool
 283         default y
 284
 285 config ARCH_MAY_HAVE_PC_FDC
 286         bool
 287         default PCI
 288
 289 config PPC_UDBG_16550
 290         bool
 291
 292 config GENERIC_TBSYNC
 293         bool
 294         default y if PPC32 && SMP
 295
 296 config AUDIT_ARCH
 297         bool
 298         default y
 299
 300 config GENERIC_BUG
 301         bool
 302         default y
 303         depends on BUG
 304
 305 config SYS_SUPPORTS_APM_EMULATION
 306         default y if PMAC_APM_EMU
 307         bool
 308
 309 config EPAPR_BOOT
 310         bool
 311         help
 312           Used to allow a board to specify it wants an ePAPR compliant wrapper.
 313
 314 config DEFAULT_UIMAGE
 315         bool
 316         help
 317           Used to allow a board to specify it wants a uImage built by default
 318
 319 config ARCH_HIBERNATION_POSSIBLE
 320         bool
 321         default y
 322
 323 config ARCH_SUSPEND_POSSIBLE
 324         def_bool y
 325         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
 326                    (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
 327                    || 44x || 40x
 328
 329 config ARCH_SUSPEND_NONZERO_CPU
 330         def_bool y
 331         depends on PPC_POWERNV || PPC_PSERIES
 332
 333 config PPC_DCR_NATIVE
 334         bool
 335
 336 config PPC_DCR_MMIO
 337         bool
 338
 339 config PPC_DCR
 340         bool
 341         depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
 342         default y
 343
 344 config PPC_OF_PLATFORM_PCI
 345         bool
 346         depends on PCI
 347         depends on PPC64 # not supported on 32 bits yet
 348
 349 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 350         depends on PPC32 || PPC_BOOK3S_64
 351         def_bool y
 352
 353 config ARCH_SUPPORTS_UPROBES
 354         def_bool y
 355
 356 config PPC_ADV_DEBUG_REGS
 357         bool
 358         depends on 40x || BOOKE
 359         default y
 360
 361 config PPC_ADV_DEBUG_IACS
 362         int
 363         depends on PPC_ADV_DEBUG_REGS
 364         default 4 if 44x
 365         default 2
 366
 367 config PPC_ADV_DEBUG_DACS
 368         int
 369         depends on PPC_ADV_DEBUG_REGS
 370         default 2
 371
 372 config PPC_ADV_DEBUG_DVCS
 373         int
 374         depends on PPC_ADV_DEBUG_REGS
 375         default 2 if 44x
 376         default 0
 377
 378 config PPC_ADV_DEBUG_DAC_RANGE
 379         bool
 380         depends on PPC_ADV_DEBUG_REGS && 44x
 381         default y
 382
 383 config PPC_DAWR
 384         bool
 385
 386 config ZONE_DMA
 387         bool
 388         default y if PPC_BOOK3E_64
 389
 390 config PGTABLE_LEVELS
 391         int
 392         default 2 if !PPC64
 393         default 4
 394
 395 source "arch/powerpc/sysdev/Kconfig"
 396 source "arch/powerpc/platforms/Kconfig"
 397
 398 menu "Kernel options"
 399
 400 config HIGHMEM
 401         bool "High memory support"
 402         depends on PPC32
 403
 404 source "kernel/Kconfig.hz"
 405
 406 config HUGETLB_PAGE_SIZE_VARIABLE
 407         bool
 408         depends on HUGETLB_PAGE && PPC_BOOK3S_64
 409         default y
 410
 411 config MATH_EMULATION
 412         bool "Math emulation"
 413         depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE
 414         help
 415           Some PowerPC chips designed for embedded applications do not have
 416           a floating-point unit and therefore do not implement the
 417           floating-point instructions in the PowerPC instruction set.  If you
 418           say Y here, the kernel will include code to emulate a floating-point
 419           unit, which will allow programs that use floating-point
 420           instructions to run.
 421
 422           This is also useful to emulate missing (optional) instructions
 423           such as fsqrt on cores that do have an FPU but do not implement
 424           them (such as Freescale BookE).
 425
 426 choice
 427         prompt "Math emulation options"
 428         default MATH_EMULATION_FULL
 429         depends on MATH_EMULATION
 430
 431 config  MATH_EMULATION_FULL
 432         bool "Emulate all the floating point instructions"
 433         help
 434           Select this option will enable the kernel to support to emulate
 435           all the floating point instructions. If your SoC doesn't have
 436           a FPU, you should select this.
 437
 438 config MATH_EMULATION_HW_UNIMPLEMENTED
 439         bool "Just emulate the FPU unimplemented instructions"
 440         help
 441           Select this if you know there does have a hardware FPU on your
 442           SoC, but some floating point instructions are not implemented by that.
 443
 444 endchoice
 445
 446 config PPC_TRANSACTIONAL_MEM
 447         bool "Transactional Memory support for POWERPC"
 448         depends on PPC_BOOK3S_64
 449         depends on SMP
 450         select ALTIVEC
 451         select VSX
 452         help
 453           Support user-mode Transactional Memory on POWERPC.
 454
 455 config PPC_UV
 456         bool "Ultravisor support"
 457         depends on KVM_BOOK3S_HV_POSSIBLE
 458         depends on DEVICE_PRIVATE
 459         default n
 460         help
 461           This option paravirtualizes the kernel to run in POWER platforms that
 462           supports the Protected Execution Facility (PEF). On such platforms,
 463           the ultravisor firmware runs at a privilege level above the
 464           hypervisor.
 465
 466           If unsure, say "N".
 467
 468 config LD_HEAD_STUB_CATCH
 469         bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
 470         depends on PPC64
 471         help
 472           Very large kernels can cause linker branch stubs to be generated by
 473           code in head_64.S, which moves the head text sections out of their
 474           specified location. This option can work around the problem.
 475
 476           If unsure, say "N".
 477
 478 config MPROFILE_KERNEL
 479         depends on PPC64 && CPU_LITTLE_ENDIAN
 480         def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
 481
 482 config HOTPLUG_CPU
 483         bool "Support for enabling/disabling CPUs"
 484         depends on SMP && (PPC_PSERIES || \
 485                 PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
 486         help
 487           Say Y here to be able to disable and re-enable individual
 488           CPUs at runtime on SMP machines.
 489
 490           Say N if you are unsure.
 491
 492 config ARCH_CPU_PROBE_RELEASE
 493         def_bool y
 494         depends on HOTPLUG_CPU
 495
 496 config ARCH_ENABLE_MEMORY_HOTPLUG
 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         select KEXEC_ELF
 532         depends on PPC64
 533         depends on CRYPTO=y
 534         depends on CRYPTO_SHA256=y
 535         help
 536           This is a new version of the kexec system call. This call is
 537           file based and takes in file descriptors as system call arguments
 538           for kernel and initramfs as opposed to a list of segments as is the
 539           case for the older kexec call.
 540
 541 config ARCH_HAS_KEXEC_PURGATORY
 542         def_bool KEXEC_FILE
 543
 544 config RELOCATABLE
 545         bool "Build a relocatable kernel"
 546         depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
 547         select NONSTATIC_KERNEL
 548         select MODULE_REL_CRCS if MODVERSIONS
 549         help
 550           This builds a kernel image that is capable of running at the
 551           location the kernel is loaded at. For ppc32, there is no any
 552           alignment restrictions, and this feature is a superset of
 553           DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
 554           16k-aligned base address. The kernel is linked as a
 555           position-independent executable (PIE) and contains dynamic relocations
 556           which are processed early in the bootup process.
 557
 558           One use is for the kexec on panic case where the recovery kernel
 559           must live at a different physical address than the primary
 560           kernel.
 561
 562           Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
 563           it has been loaded at and the compile time physical addresses
 564           CONFIG_PHYSICAL_START is ignored.  However CONFIG_PHYSICAL_START
 565           setting can still be useful to bootwrappers that need to know the
 566           load address of the kernel (eg. u-boot/mkimage).
 567
 568 config RANDOMIZE_BASE
 569         bool "Randomize the address of the kernel image"
 570         depends on (FSL_BOOKE && FLATMEM && PPC32)
 571         depends on RELOCATABLE
 572         help
 573           Randomizes the virtual address at which the kernel image is
 574           loaded, as a security feature that deters exploit attempts
 575           relying on knowledge of the location of kernel internals.
 576
 577           If unsure, say Y.
 578
 579 config RELOCATABLE_TEST
 580         bool "Test relocatable kernel"
 581         depends on (PPC64 && RELOCATABLE)
 582         help
 583           This runs the relocatable kernel at the address it was initially
 584           loaded at, which tends to be non-zero and therefore test the
 585           relocation code.
 586
 587 config CRASH_DUMP
 588         bool "Build a dump capture kernel"
 589         depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP)
 590         select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
 591         help
 592           Build a kernel suitable for use as a dump capture kernel.
 593           The same kernel binary can be used as production kernel and dump
 594           capture kernel.
 595
 596 config FA_DUMP
 597         bool "Firmware-assisted dump"
 598         depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
 599         select CRASH_CORE
 600         select CRASH_DUMP
 601         help
 602           A robust mechanism to get reliable kernel crash dump with
 603           assistance from firmware. This approach does not use kexec,
 604           instead firmware assists in booting the capture kernel
 605           while preserving memory contents. Firmware-assisted dump
 606           is meant to be a kdump replacement offering robustness and
 607           speed not possible without system firmware assistance.
 608
 609           If unsure, say "y". Only special kernels like petitboot may
 610           need to say "N" here.
 611
 612 config PRESERVE_FA_DUMP
 613         bool "Preserve Firmware-assisted dump"
 614         depends on PPC64 && PPC_POWERNV && !FA_DUMP
 615         help
 616           On a kernel with FA_DUMP disabled, this option helps to preserve
 617           crash data from a previously crash'ed kernel. Useful when the next
 618           memory preserving kernel boot would process this crash data.
 619           Petitboot kernel is the typical usecase for this option.
 620
 621 config OPAL_CORE
 622         bool "Export OPAL memory as /sys/firmware/opal/core"
 623         depends on PPC64 && PPC_POWERNV
 624         help
 625           This option uses the MPIPL support in firmware to provide an
 626           ELF core of OPAL memory after a crash. The ELF core is exported
 627           as /sys/firmware/opal/core file which is helpful in debugging
 628           OPAL crashes using GDB.
 629
 630 config IRQ_ALL_CPUS
 631         bool "Distribute interrupts on all CPUs by default"
 632         depends on SMP
 633         help
 634           This option gives the kernel permission to distribute IRQs across
 635           multiple CPUs.  Saying N here will route all IRQs to the first
 636           CPU.  Generally saying Y is safe, although some problems have been
 637           reported with SMP Power Macintoshes with this option enabled.
 638
 639 config NUMA
 640         bool "NUMA support"
 641         depends on PPC64
 642         default y if SMP && PPC_PSERIES
 643
 644 config NODES_SHIFT
 645         int
 646         default "8" if PPC64
 647         default "4"
 648         depends on NEED_MULTIPLE_NODES
 649
 650 config USE_PERCPU_NUMA_NODE_ID
 651         def_bool y
 652         depends on NUMA
 653
 654 config HAVE_MEMORYLESS_NODES
 655         def_bool y
 656         depends on NUMA
 657
 658 config ARCH_SELECT_MEMORY_MODEL
 659         def_bool y
 660         depends on PPC64
 661
 662 config ARCH_FLATMEM_ENABLE
 663         def_bool y
 664         depends on (PPC64 && !NUMA) || PPC32
 665
 666 config ARCH_SPARSEMEM_ENABLE
 667         def_bool y
 668         depends on PPC64
 669         select SPARSEMEM_VMEMMAP_ENABLE
 670
 671 config ARCH_SPARSEMEM_DEFAULT
 672         def_bool y
 673         depends on PPC_BOOK3S_64
 674
 675 config SYS_SUPPORTS_HUGETLBFS
 676         bool
 677
 678 config ILLEGAL_POINTER_VALUE
 679         hex
 680         # This is roughly half way between the top of user space and the bottom
 681         # of kernel space, which seems about as good as we can get.
 682         default 0x5deadbeef0000000 if PPC64
 683         default 0
 684
 685 config ARCH_MEMORY_PROBE
 686         def_bool y
 687         depends on MEMORY_HOTPLUG
 688
 689 # Some NUMA nodes have memory ranges that span
 690 # other nodes.  Even though a pfn is valid and
 691 # between a node's start and end pfns, it may not
 692 # reside on that node.  See memmap_init_zone()
 693 # for details.
 694 config NODES_SPAN_OTHER_NODES
 695         def_bool y
 696         depends on NEED_MULTIPLE_NODES
 697
 698 config STDBINUTILS
 699         bool "Using standard binutils settings"
 700         depends on 44x
 701         default y
 702         help
 703           Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
 704           Note, that kernel will be able to run only those applications,
 705           which had been compiled using binutils later than 2.17.50.0.3 with
 706           '-zmax-page-size' set to 256K (the default is 64K). Or, if using
 707           the older binutils, you can patch them with a trivial patch, which
 708           changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
 709
 710 choice
 711         prompt "Page size"
 712         default PPC_4K_PAGES
 713         help
 714           Select the kernel logical page size. Increasing the page size
 715           will reduce software overhead at each page boundary, allow
 716           hardware prefetch mechanisms to be more effective, and allow
 717           larger dma transfers increasing IO efficiency and reducing
 718           overhead. However the utilization of memory will increase.
 719           For example, each cached file will using a multiple of the
 720           page size to hold its contents and the difference between the
 721           end of file and the end of page is wasted.
 722
 723           Some dedicated systems, such as software raid serving with
 724           accelerated calculations, have shown significant increases.
 725
 726           If you configure a 64 bit kernel for 64k pages but the
 727           processor does not support them, then the kernel will simulate
 728           them with 4k pages, loading them on demand, but with the
 729           reduced software overhead and larger internal fragmentation.
 730           For the 32 bit kernel, a large page option will not be offered
 731           unless it is supported by the configured processor.
 732
 733           If unsure, choose 4K_PAGES.
 734
 735 config PPC_4K_PAGES
 736         bool "4k page size"
 737         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 738
 739 config PPC_16K_PAGES
 740         bool "16k page size"
 741         depends on 44x || PPC_8xx
 742
 743 config PPC_64K_PAGES
 744         bool "64k page size"
 745         depends on 44x || PPC_BOOK3S_64
 746         select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
 747
 748 config PPC_256K_PAGES
 749         bool "256k page size"
 750         depends on 44x && !STDBINUTILS
 751         help
 752           Make the page size 256k.
 753
 754           As the ELF standard only requires alignment to support page
 755           sizes up to 64k, you will need to compile all of your user
 756           space applications with a non-standard binutils settings
 757           (see the STDBINUTILS description for details).
 758
 759           Say N unless you know what you are doing.
 760
 761 endchoice
 762
 763 config PPC_PAGE_SHIFT
 764         int
 765         default 18 if PPC_256K_PAGES
 766         default 16 if PPC_64K_PAGES
 767         default 14 if PPC_16K_PAGES
 768         default 12
 769
 770 config THREAD_SHIFT
 771         int "Thread shift" if EXPERT
 772         range 13 15
 773         default "15" if PPC_256K_PAGES
 774         default "14" if PPC64
 775         default "13"
 776         help
 777           Used to define the stack size. The default is almost always what you
 778           want. Only change this if you know what you are doing.
 779
 780 config ETEXT_SHIFT_BOOL
 781         bool "Set custom etext alignment" if STRICT_KERNEL_RWX && \
 782                                              (PPC_BOOK3S_32 || PPC_8xx)
 783         depends on ADVANCED_OPTIONS
 784         help
 785           This option allows you to set the kernel end of text alignment. When
 786           RAM is mapped by blocks, the alignment needs to fit the size and
 787           number of possible blocks. The default should be OK for most configs.
 788
 789           Say N here unless you know what you are doing.
 790
 791 config ETEXT_SHIFT
 792         int "_etext shift" if ETEXT_SHIFT_BOOL
 793         range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
 794         range 19 23 if STRICT_KERNEL_RWX && PPC_8xx
 795         default 17 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
 796         default 19 if STRICT_KERNEL_RWX && PPC_8xx
 797         default PPC_PAGE_SHIFT
 798         help
 799           On Book3S 32 (603+), IBATs are used to map kernel text.
 800           Smaller is the alignment, greater is the number of necessary IBATs.
 801
 802           On 8xx, large pages (512kb or 8M) are used to map kernel linear
 803           memory. Aligning to 8M reduces TLB misses as only 8M pages are used
 804           in that case.
 805
 806 config DATA_SHIFT_BOOL
 807         bool "Set custom data alignment" if STRICT_KERNEL_RWX && \
 808                                             (PPC_BOOK3S_32 || PPC_8xx)
 809         depends on ADVANCED_OPTIONS
 810         help
 811           This option allows you to set the kernel data alignment. When
 812           RAM is mapped by blocks, the alignment needs to fit the size and
 813           number of possible blocks. The default should be OK for most configs.
 814
 815           Say N here unless you know what you are doing.
 816
 817 config DATA_SHIFT
 818         int "Data shift" if DATA_SHIFT_BOOL
 819         default 24 if STRICT_KERNEL_RWX && PPC64
 820         range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
 821         range 19 23 if STRICT_KERNEL_RWX && PPC_8xx
 822         default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
 823         default 23 if STRICT_KERNEL_RWX && PPC_8xx
 824         default PPC_PAGE_SHIFT
 825         help
 826           On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO.
 827           Smaller is the alignment, greater is the number of necessary DBATs.
 828
 829           On 8xx, large pages (512kb or 8M) are used to map kernel linear
 830           memory. Aligning to 8M reduces TLB misses as only 8M pages are used
 831           in that case.
 832
 833 config FORCE_MAX_ZONEORDER
 834         int "Maximum zone order"
 835         range 8 9 if PPC64 && PPC_64K_PAGES
 836         default "9" if PPC64 && PPC_64K_PAGES
 837         range 13 13 if PPC64 && !PPC_64K_PAGES
 838         default "13" if PPC64 && !PPC_64K_PAGES
 839         range 9 64 if PPC32 && PPC_16K_PAGES
 840         default "9" if PPC32 && PPC_16K_PAGES
 841         range 7 64 if PPC32 && PPC_64K_PAGES
 842         default "7" if PPC32 && PPC_64K_PAGES
 843         range 5 64 if PPC32 && PPC_256K_PAGES
 844         default "5" if PPC32 && PPC_256K_PAGES
 845         range 11 64
 846         default "11"
 847         help
 848           The kernel memory allocator divides physically contiguous memory
 849           blocks into "zones", where each zone is a power of two number of
 850           pages.  This option selects the largest power of two that the kernel
 851           keeps in the memory allocator.  If you need to allocate very large
 852           blocks of physically contiguous memory, then you may need to
 853           increase this value.
 854
 855           This config option is actually maximum order plus one. For example,
 856           a value of 11 means that the largest free memory block is 2^10 pages.
 857
 858           The page size is not necessarily 4KB.  For example, on 64-bit
 859           systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES.  Keep
 860           this in mind when choosing a value for this option.
 861
 862 config PPC_SUBPAGE_PROT
 863         bool "Support setting protections for 4k subpages"
 864         depends on PPC_BOOK3S_64 && PPC_64K_PAGES
 865         help
 866           This option adds support for a system call to allow user programs
 867           to set access permissions (read/write, readonly, or no access)
 868           on the 4k subpages of each 64k page.
 869
 870 config PPC_COPRO_BASE
 871         bool
 872
 873 config SCHED_SMT
 874         bool "SMT (Hyperthreading) scheduler support"
 875         depends on PPC64 && SMP
 876         help
 877           SMT scheduler support improves the CPU scheduler's decision making
 878           when dealing with POWER5 cpus at a cost of slightly increased
 879           overhead in some places. If unsure say N here.
 880
 881 config PPC_DENORMALISATION
 882         bool "PowerPC denormalisation exception handling"
 883         depends on PPC_BOOK3S_64
 884         default "y" if PPC_POWERNV
 885         help
 886           Add support for handling denormalisation of single precision
 887           values.  Useful for bare metal only.  If unsure say Y here.
 888
 889 config CMDLINE_BOOL
 890         bool "Default bootloader kernel arguments"
 891
 892 config CMDLINE
 893         string "Initial kernel command string" if CMDLINE_BOOL
 894         default "console=ttyS0,9600 console=tty0 root=/dev/sda2" if CMDLINE_BOOL
 895         default ""
 896         help
 897           On some platforms, there is currently no way for the boot loader to
 898           pass arguments to the kernel. For these platforms, you can supply
 899           some command-line options at build time by entering them here.  In
 900           most cases you will need to specify the root device here.
 901
 902 choice
 903         prompt "Kernel command line type" if CMDLINE != ""
 904         default CMDLINE_FROM_BOOTLOADER
 905
 906 config CMDLINE_FROM_BOOTLOADER
 907         bool "Use bootloader kernel arguments if available"
 908         help
 909           Uses the command-line options passed by the boot loader. If
 910           the boot loader doesn't provide any, the default kernel command
 911           string provided in CMDLINE will be used.
 912
 913 config CMDLINE_EXTEND
 914         bool "Extend bootloader kernel arguments"
 915         help
 916           The command-line arguments provided by the boot loader will be
 917           appended to the default kernel command string.
 918
 919 config CMDLINE_FORCE
 920         bool "Always use the default kernel command string"
 921         help
 922           Always use the default kernel command string, even if the boot
 923           loader passes other arguments to the kernel.
 924           This is useful if you cannot or don't want to change the
 925           command-line options your boot loader passes to the kernel.
 926
 927 endchoice
 928
 929 config EXTRA_TARGETS
 930         string "Additional default image types"
 931         help
 932           List additional targets to be built by the bootwrapper here (separated
 933           by spaces).  This is useful for targets that depend of device tree
 934           files in the .dts directory.
 935
 936           Targets in this list will be build as part of the default build
 937           target, or when the user does a 'make zImage' or a
 938           'make zImage.initrd'.
 939
 940           If unsure, leave blank
 941
 942 config ARCH_WANTS_FREEZER_CONTROL
 943         def_bool y
 944         depends on ADB_PMU
 945
 946 source "kernel/power/Kconfig"
 947
 948 config SECCOMP
 949         bool "Enable seccomp to safely compute untrusted bytecode"
 950         depends on PROC_FS
 951         default y
 952         help
 953           This kernel feature is useful for number crunching applications
 954           that may need to compute untrusted bytecode during their
 955           execution. By using pipes or other transports made available to
 956           the process as file descriptors supporting the read/write
 957           syscalls, it's possible to isolate those applications in
 958           their own address space using seccomp. Once seccomp is
 959           enabled via /proc/<pid>/seccomp, it cannot be disabled
 960           and the task is only allowed to execute a few safe syscalls
 961           defined by each seccomp mode.
 962
 963           If unsure, say Y. Only embedded should say N here.
 964
 965 config PPC_MEM_KEYS
 966         prompt "PowerPC Memory Protection Keys"
 967         def_bool y
 968         depends on PPC_BOOK3S_64
 969         select ARCH_USES_HIGH_VMA_FLAGS
 970         select ARCH_HAS_PKEYS
 971         help
 972           Memory Protection Keys provides a mechanism for enforcing
 973           page-based protections, but without requiring modification of the
 974           page tables when an application changes protection domains.
 975
 976           For details, see Documentation/core-api/protection-keys.rst
 977
 978           If unsure, say y.
 979
 980 config PPC_SECURE_BOOT
 981         prompt "Enable secure boot support"
 982         bool
 983         depends on PPC_POWERNV
 984         depends on IMA_ARCH_POLICY
 985         imply IMA_SECURE_AND_OR_TRUSTED_BOOT
 986         help
 987           Systems with firmware secure boot enabled need to define security
 988           policies to extend secure boot to the OS. This config allows a user
 989           to enable OS secure boot on systems that have firmware support for
 990           it. If in doubt say N.
 991
 992 config PPC_SECVAR_SYSFS
 993         bool "Enable sysfs interface for POWER secure variables"
 994         default y
 995         depends on PPC_SECURE_BOOT
 996         depends on SYSFS
 997         help
 998           POWER secure variables are managed and controlled by firmware.
 999           These variables are exposed to userspace via sysfs to enable
1000           read/write operations on these variables. Say Y if you have
1001           secure boot enabled and want to expose variables to userspace.
1002
1003 endmenu
1004
1005 config ISA_DMA_API
1006         bool
1007         default PCI
1008
1009 menu "Bus options"
1010
1011 config ISA
1012         bool "Support for ISA-bus hardware"
1013         depends on PPC_CHRP
1014         select PPC_I8259
1015         help
1016           Find out whether you have ISA slots on your motherboard.  ISA is the
1017           name of a bus system, i.e. the way the CPU talks to the other stuff
1018           inside your box.  If you have an Apple machine, say N here; if you
1019           have an IBM RS/6000 or pSeries machine, say Y.  If you have an
1020           embedded board, consult your board documentation.
1021
1022 config GENERIC_ISA_DMA
1023         bool
1024         depends on ISA_DMA_API
1025         default y
1026
1027 config PPC_INDIRECT_PCI
1028         bool
1029         depends on PCI
1030         default y if 40x || 44x
1031
1032 config SBUS
1033         bool
1034
1035 config FSL_SOC
1036         bool
1037
1038 config FSL_PCI
1039         bool
1040         select ARCH_HAS_DMA_SET_MASK
1041         select PPC_INDIRECT_PCI
1042         select PCI_QUIRKS
1043
1044 config FSL_PMC
1045         bool
1046         default y
1047         depends on SUSPEND && (PPC_85xx || PPC_86xx)
1048         help
1049           Freescale MPC85xx/MPC86xx power management controller support
1050           (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
1051
1052 config PPC4xx_CPM
1053         bool
1054         default y
1055         depends on SUSPEND && (44x || 40x)
1056         help
1057           PPC4xx Clock Power Management (CPM) support (suspend/resume).
1058           It also enables support for two different idle states (idle-wait
1059           and idle-doze).
1060
1061 config 4xx_SOC
1062         bool
1063
1064 config FSL_LBC
1065         bool "Freescale Local Bus support"
1066         help
1067           Enables reporting of errors from the Freescale local bus
1068           controller.  Also contains some common code used by
1069           drivers for specific local bus peripherals.
1070
1071 config FSL_GTM
1072         bool
1073         depends on PPC_83xx || QUICC_ENGINE || CPM2
1074         help
1075           Freescale General-purpose Timers support
1076
1077 config PCI_8260
1078         bool
1079         depends on PCI && 8260
1080         select PPC_INDIRECT_PCI
1081         default y
1082
1083 config FSL_RIO
1084         bool "Freescale Embedded SRIO Controller support"
1085         depends on RAPIDIO = y && HAVE_RAPIDIO
1086         default "n"
1087         help
1088           Include support for RapidIO controller on Freescale embedded
1089           processors (MPC8548, MPC8641, etc).
1090
1091 endmenu
1092
1093 config NONSTATIC_KERNEL
1094         bool
1095
1096 menu "Advanced setup"
1097         depends on PPC32
1098
1099 config ADVANCED_OPTIONS
1100         bool "Prompt for advanced kernel configuration options"
1101         help
1102           This option will enable prompting for a variety of advanced kernel
1103           configuration options.  These options can cause the kernel to not
1104           work if they are set incorrectly, but can be used to optimize certain
1105           aspects of kernel memory management.
1106
1107           Unless you know what you are doing, say N here.
1108
1109 comment "Default settings for advanced configuration options are used"
1110         depends on !ADVANCED_OPTIONS
1111
1112 config LOWMEM_SIZE_BOOL
1113         bool "Set maximum low memory"
1114         depends on ADVANCED_OPTIONS
1115         help
1116           This option allows you to set the maximum amount of memory which
1117           will be used as "low memory", that is, memory which the kernel can
1118           access directly, without having to set up a kernel virtual mapping.
1119           This can be useful in optimizing the layout of kernel virtual
1120           memory.
1121
1122           Say N here unless you know what you are doing.
1123
1124 config LOWMEM_SIZE
1125         hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
1126         default "0x30000000"
1127
1128 config LOWMEM_CAM_NUM_BOOL
1129         bool "Set number of CAMs to use to map low memory"
1130         depends on ADVANCED_OPTIONS && FSL_BOOKE
1131         help
1132           This option allows you to set the maximum number of CAM slots that
1133           will be used to map low memory.  There are a limited number of slots
1134           available and even more limited number that will fit in the L1 MMU.
1135           However, using more entries will allow mapping more low memory.  This
1136           can be useful in optimizing the layout of kernel virtual memory.
1137
1138           Say N here unless you know what you are doing.
1139
1140 config LOWMEM_CAM_NUM
1141         depends on FSL_BOOKE
1142         int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
1143         default 3
1144
1145 config DYNAMIC_MEMSTART
1146         bool "Enable page aligned dynamic load address for kernel"
1147         depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
1148         select NONSTATIC_KERNEL
1149         help
1150           This option enables the kernel to be loaded at any page aligned
1151           physical address. The kernel creates a mapping from KERNELBASE to
1152           the address where the kernel is loaded. The page size here implies
1153           the TLB page size of the mapping for kernel on the particular platform.
1154           Please refer to the init code for finding the TLB page size.
1155
1156           DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
1157           kernel image, where the only restriction is the page aligned kernel
1158           load address. When this option is enabled, the compile time physical
1159           address CONFIG_PHYSICAL_START is ignored.
1160
1161           This option is overridden by CONFIG_RELOCATABLE
1162
1163 config PAGE_OFFSET_BOOL
1164         bool "Set custom page offset address"
1165         depends on ADVANCED_OPTIONS
1166         help
1167           This option allows you to set the kernel virtual address at which
1168           the kernel will map low memory.  This can be useful in optimizing
1169           the virtual memory layout of the system.
1170
1171           Say N here unless you know what you are doing.
1172
1173 config PAGE_OFFSET
1174         hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
1175         default "0xc0000000"
1176
1177 config KERNEL_START_BOOL
1178         bool "Set custom kernel base address"
1179         depends on ADVANCED_OPTIONS
1180         help
1181           This option allows you to set the kernel virtual address at which
1182           the kernel will be loaded.  Normally this should match PAGE_OFFSET
1183           however there are times (like kdump) that one might not want them
1184           to be the same.
1185
1186           Say N here unless you know what you are doing.
1187
1188 config KERNEL_START
1189         hex "Virtual address of kernel base" if KERNEL_START_BOOL
1190         default PAGE_OFFSET if PAGE_OFFSET_BOOL
1191         default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
1192         default "0xc0000000"
1193
1194 config PHYSICAL_START_BOOL
1195         bool "Set physical address where the kernel is loaded"
1196         depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
1197         help
1198           This gives the physical address where the kernel is loaded.
1199
1200           Say N here unless you know what you are doing.
1201
1202 config PHYSICAL_START
1203         hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
1204         default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
1205         default "0x00000000"
1206
1207 config PHYSICAL_ALIGN
1208         hex
1209         default "0x04000000" if FSL_BOOKE
1210         help
1211           This value puts the alignment restrictions on physical address
1212           where kernel is loaded and run from. Kernel is compiled for an
1213           address which meets above alignment restriction.
1214
1215 config TASK_SIZE_BOOL
1216         bool "Set custom user task size"
1217         depends on ADVANCED_OPTIONS
1218         help
1219           This option allows you to set the amount of virtual address space
1220           allocated to user tasks.  This can be useful in optimizing the
1221           virtual memory layout of the system.
1222
1223           Say N here unless you know what you are doing.
1224
1225 config TASK_SIZE
1226         hex "Size of user task space" if TASK_SIZE_BOOL
1227         default "0x80000000" if PPC_8xx
1228         default "0xc0000000"
1229
1230 config PIN_TLB
1231         bool "Pinned Kernel TLBs (860 ONLY)"
1232         depends on ADVANCED_OPTIONS && PPC_8xx && \
1233                    !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
1234
1235 config PIN_TLB_DATA
1236         bool "Pinned TLB for DATA"
1237         depends on PIN_TLB
1238         default y
1239
1240 config PIN_TLB_IMMR
1241         bool "Pinned TLB for IMMR"
1242         depends on PIN_TLB || PPC_EARLY_DEBUG_CPM
1243         default y
1244
1245 config PIN_TLB_TEXT
1246         bool "Pinned TLB for TEXT"
1247         depends on PIN_TLB
1248         default y
1249 endmenu
1250
1251 if PPC64
1252 # This value must have zeroes in the bottom 60 bits otherwise lots will break
1253 config PAGE_OFFSET
1254         hex
1255         default "0xc000000000000000"
1256 config KERNEL_START
1257         hex
1258         default "0xc000000000000000"
1259 config PHYSICAL_START
1260         hex
1261         default "0x00000000"
1262 endif
1263
1264 config  ARCH_RANDOM
1265         def_bool n
1266
1267 config PPC_LIB_RHEAP
1268         bool
1269
1270 source "arch/powerpc/kvm/Kconfig"
1271
1272 source "kernel/livepatch/Kconfig"