arch/arm64/Kconfig

   1 config ARM64
   2         def_bool y
   3         select ARCH_BINFMT_ELF_RANDOMIZE_PIE
   4         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
   5         select ARCH_HAS_GCOV_PROFILE_ALL
   6         select ARCH_HAS_SG_CHAIN
   7         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
   8         select ARCH_USE_CMPXCHG_LOCKREF
   9         select ARCH_SUPPORTS_ATOMIC_RMW
  10         select ARCH_WANT_OPTIONAL_GPIOLIB
  11         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
  12         select ARCH_WANT_FRAME_POINTERS
  13         select ARM_AMBA
  14         select ARM_ARCH_TIMER
  15         select ARM_GIC
  16         select AUDIT_ARCH_COMPAT_GENERIC
  17         select ARM_GIC_V2M if PCI_MSI
  18         select ARM_GIC_V3
  19         select ARM_GIC_V3_ITS if PCI_MSI
  20         select BUILDTIME_EXTABLE_SORT
  21         select CLONE_BACKWARDS
  22         select COMMON_CLK
  23         select CPU_PM if (SUSPEND || CPU_IDLE)
  24         select DCACHE_WORD_ACCESS
  25         select GENERIC_ALLOCATOR
  26         select GENERIC_CLOCKEVENTS
  27         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  28         select GENERIC_CPU_AUTOPROBE
  29         select GENERIC_EARLY_IOREMAP
  30         select GENERIC_IRQ_PROBE
  31         select GENERIC_IRQ_SHOW
  32         select GENERIC_PCI_IOMAP
  33         select GENERIC_SCHED_CLOCK
  34         select GENERIC_SMP_IDLE_THREAD
  35         select GENERIC_STRNCPY_FROM_USER
  36         select GENERIC_STRNLEN_USER
  37         select GENERIC_TIME_VSYSCALL
  38         select HANDLE_DOMAIN_IRQ
  39         select HARDIRQS_SW_RESEND
  40         select HAVE_ALIGNED_STRUCT_PAGE if SLUB
  41         select HAVE_ARCH_AUDITSYSCALL
  42         select HAVE_ARCH_BITREVERSE
  43         select HAVE_ARCH_JUMP_LABEL
  44         select HAVE_ARCH_KGDB
  45         select HAVE_ARCH_SECCOMP_FILTER
  46         select HAVE_ARCH_TRACEHOOK
  47         select HAVE_BPF_JIT
  48         select HAVE_C_RECORDMCOUNT
  49         select HAVE_CC_STACKPROTECTOR
  50         select HAVE_CMPXCHG_DOUBLE
  51         select HAVE_DEBUG_BUGVERBOSE
  52         select HAVE_DEBUG_KMEMLEAK
  53         select HAVE_DMA_API_DEBUG
  54         select HAVE_DMA_ATTRS
  55         select HAVE_DMA_CONTIGUOUS
  56         select HAVE_DYNAMIC_FTRACE
  57         select HAVE_EFFICIENT_UNALIGNED_ACCESS
  58         select HAVE_FTRACE_MCOUNT_RECORD
  59         select HAVE_FUNCTION_TRACER
  60         select HAVE_FUNCTION_GRAPH_TRACER
  61         select HAVE_GENERIC_DMA_COHERENT
  62         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  63         select HAVE_MEMBLOCK
  64         select HAVE_PATA_PLATFORM
  65         select HAVE_PERF_EVENTS
  66         select HAVE_PERF_REGS
  67         select HAVE_PERF_USER_STACK_DUMP
  68         select HAVE_RCU_TABLE_FREE
  69         select HAVE_SYSCALL_TRACEPOINTS
  70         select IRQ_DOMAIN
  71         select MODULES_USE_ELF_RELA
  72         select NO_BOOTMEM
  73         select OF
  74         select OF_EARLY_FLATTREE
  75         select OF_RESERVED_MEM
  76         select PERF_USE_VMALLOC
  77         select POWER_RESET
  78         select POWER_SUPPLY
  79         select RTC_LIB
  80         select SPARSE_IRQ
  81         select SYSCTL_EXCEPTION_TRACE
  82         select HAVE_CONTEXT_TRACKING
  83         help
  84           ARM 64-bit (AArch64) Linux support.
  85
  86 config 64BIT
  87         def_bool y
  88
  89 config ARCH_PHYS_ADDR_T_64BIT
  90         def_bool y
  91
  92 config MMU
  93         def_bool y
  94
  95 config NO_IOPORT_MAP
  96         def_bool y if !PCI
  97
  98 config STACKTRACE_SUPPORT
  99         def_bool y
 100
 101 config LOCKDEP_SUPPORT
 102         def_bool y
 103
 104 config TRACE_IRQFLAGS_SUPPORT
 105         def_bool y
 106
 107 config RWSEM_XCHGADD_ALGORITHM
 108         def_bool y
 109
 110 config GENERIC_HWEIGHT
 111         def_bool y
 112
 113 config GENERIC_CSUM
 114         def_bool y
 115
 116 config GENERIC_CALIBRATE_DELAY
 117         def_bool y
 118
 119 config ZONE_DMA
 120         def_bool y
 121
 122 config HAVE_GENERIC_RCU_GUP
 123         def_bool y
 124
 125 config ARCH_DMA_ADDR_T_64BIT
 126         def_bool y
 127
 128 config NEED_DMA_MAP_STATE
 129         def_bool y
 130
 131 config NEED_SG_DMA_LENGTH
 132         def_bool y
 133
 134 config SWIOTLB
 135         def_bool y
 136
 137 config IOMMU_HELPER
 138         def_bool SWIOTLB
 139
 140 config KERNEL_MODE_NEON
 141         def_bool y
 142
 143 config FIX_EARLYCON_MEM
 144         def_bool y
 145
 146 source "init/Kconfig"
 147
 148 source "kernel/Kconfig.freezer"
 149
 150 menu "Platform selection"
 151
 152 config ARCH_EXYNOS
 153         bool
 154         help
 155           This enables support for Samsung Exynos SoC family
 156
 157 config ARCH_EXYNOS7
 158         bool "ARMv8 based Samsung Exynos7"
 159         select ARCH_EXYNOS
 160         select COMMON_CLK_SAMSUNG
 161         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 162         select HAVE_S3C_RTC if RTC_CLASS
 163         select PINCTRL
 164         select PINCTRL_EXYNOS
 165
 166         help
 167           This enables support for Samsung Exynos7 SoC family
 168
 169 config ARCH_FSL_LS2085A
 170         bool "Freescale LS2085A SOC"
 171         help
 172           This enables support for Freescale LS2085A SOC.
 173
 174 config ARCH_MEDIATEK
 175         bool "Mediatek MT65xx & MT81xx ARMv8 SoC"
 176         select ARM_GIC
 177         help
 178           Support for Mediatek MT65xx & MT81xx ARMv8 SoCs
 179
 180 config ARCH_SEATTLE
 181         bool "AMD Seattle SoC Family"
 182         help
 183           This enables support for AMD Seattle SOC Family
 184
 185 config ARCH_TEGRA
 186         bool "NVIDIA Tegra SoC Family"
 187         select ARCH_HAS_RESET_CONTROLLER
 188         select ARCH_REQUIRE_GPIOLIB
 189         select CLKDEV_LOOKUP
 190         select CLKSRC_MMIO
 191         select CLKSRC_OF
 192         select GENERIC_CLOCKEVENTS
 193         select HAVE_CLK
 194         select PINCTRL
 195         select RESET_CONTROLLER
 196         help
 197           This enables support for the NVIDIA Tegra SoC family.
 198
 199 config ARCH_TEGRA_132_SOC
 200         bool "NVIDIA Tegra132 SoC"
 201         depends on ARCH_TEGRA
 202         select PINCTRL_TEGRA124
 203         select USB_ULPI if USB_PHY
 204         select USB_ULPI_VIEWPORT if USB_PHY
 205         help
 206           Enable support for NVIDIA Tegra132 SoC, based on the Denver
 207           ARMv8 CPU.  The Tegra132 SoC is similar to the Tegra124 SoC,
 208           but contains an NVIDIA Denver CPU complex in place of
 209           Tegra124's "4+1" Cortex-A15 CPU complex.
 210
 211 config ARCH_THUNDER
 212         bool "Cavium Inc. Thunder SoC Family"
 213         help
 214           This enables support for Cavium's Thunder Family of SoCs.
 215
 216 config ARCH_VEXPRESS
 217         bool "ARMv8 software model (Versatile Express)"
 218         select ARCH_REQUIRE_GPIOLIB
 219         select COMMON_CLK_VERSATILE
 220         select POWER_RESET_VEXPRESS
 221         select VEXPRESS_CONFIG
 222         help
 223           This enables support for the ARMv8 software model (Versatile
 224           Express).
 225
 226 config ARCH_XGENE
 227         bool "AppliedMicro X-Gene SOC Family"
 228         help
 229           This enables support for AppliedMicro X-Gene SOC Family
 230
 231 endmenu
 232
 233 menu "Bus support"
 234
 235 config PCI
 236         bool "PCI support"
 237         help
 238           This feature enables support for PCI bus system. If you say Y
 239           here, the kernel will include drivers and infrastructure code
 240           to support PCI bus devices.
 241
 242 config PCI_DOMAINS
 243         def_bool PCI
 244
 245 config PCI_DOMAINS_GENERIC
 246         def_bool PCI
 247
 248 config PCI_SYSCALL
 249         def_bool PCI
 250
 251 source "drivers/pci/Kconfig"
 252 source "drivers/pci/pcie/Kconfig"
 253 source "drivers/pci/hotplug/Kconfig"
 254
 255 endmenu
 256
 257 menu "Kernel Features"
 258
 259 menu "ARM errata workarounds via the alternatives framework"
 260
 261 config ARM64_ERRATUM_826319
 262         bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted"
 263         default y
 264         help
 265           This option adds an alternative code sequence to work around ARM
 266           erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or
 267           AXI master interface and an L2 cache.
 268
 269           If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors
 270           and is unable to accept a certain write via this interface, it will
 271           not progress on read data presented on the read data channel and the
 272           system can deadlock.
 273
 274           The workaround promotes data cache clean instructions to
 275           data cache clean-and-invalidate.
 276           Please note that this does not necessarily enable the workaround,
 277           as it depends on the alternative framework, which will only patch
 278           the kernel if an affected CPU is detected.
 279
 280           If unsure, say Y.
 281
 282 config ARM64_ERRATUM_827319
 283         bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect"
 284         default y
 285         help
 286           This option adds an alternative code sequence to work around ARM
 287           erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI
 288           master interface and an L2 cache.
 289
 290           Under certain conditions this erratum can cause a clean line eviction
 291           to occur at the same time as another transaction to the same address
 292           on the AMBA 5 CHI interface, which can cause data corruption if the
 293           interconnect reorders the two transactions.
 294
 295           The workaround promotes data cache clean instructions to
 296           data cache clean-and-invalidate.
 297           Please note that this does not necessarily enable the workaround,
 298           as it depends on the alternative framework, which will only patch
 299           the kernel if an affected CPU is detected.
 300
 301           If unsure, say Y.
 302
 303 config ARM64_ERRATUM_824069
 304         bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop"
 305         default y
 306         help
 307           This option adds an alternative code sequence to work around ARM
 308           erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected
 309           to a coherent interconnect.
 310
 311           If a Cortex-A53 processor is executing a store or prefetch for
 312           write instruction at the same time as a processor in another
 313           cluster is executing a cache maintenance operation to the same
 314           address, then this erratum might cause a clean cache line to be
 315           incorrectly marked as dirty.
 316
 317           The workaround promotes data cache clean instructions to
 318           data cache clean-and-invalidate.
 319           Please note that this option does not necessarily enable the
 320           workaround, as it depends on the alternative framework, which will
 321           only patch the kernel if an affected CPU is detected.
 322
 323           If unsure, say Y.
 324
 325 config ARM64_ERRATUM_819472
 326         bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption"
 327         default y
 328         help
 329           This option adds an alternative code sequence to work around ARM
 330           erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache
 331           present when it is connected to a coherent interconnect.
 332
 333           If the processor is executing a load and store exclusive sequence at
 334           the same time as a processor in another cluster is executing a cache
 335           maintenance operation to the same address, then this erratum might
 336           cause data corruption.
 337
 338           The workaround promotes data cache clean instructions to
 339           data cache clean-and-invalidate.
 340           Please note that this does not necessarily enable the workaround,
 341           as it depends on the alternative framework, which will only patch
 342           the kernel if an affected CPU is detected.
 343
 344           If unsure, say Y.
 345
 346 config ARM64_ERRATUM_832075
 347         bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads"
 348         default y
 349         help
 350           This option adds an alternative code sequence to work around ARM
 351           erratum 832075 on Cortex-A57 parts up to r1p2.
 352
 353           Affected Cortex-A57 parts might deadlock when exclusive load/store
 354           instructions to Write-Back memory are mixed with Device loads.
 355
 356           The workaround is to promote device loads to use Load-Acquire
 357           semantics.
 358           Please note that this does not necessarily enable the workaround,
 359           as it depends on the alternative framework, which will only patch
 360           the kernel if an affected CPU is detected.
 361
 362           If unsure, say Y.
 363
 364 endmenu
 365
 366
 367 choice
 368         prompt "Page size"
 369         default ARM64_4K_PAGES
 370         help
 371           Page size (translation granule) configuration.
 372
 373 config ARM64_4K_PAGES
 374         bool "4KB"
 375         help
 376           This feature enables 4KB pages support.
 377
 378 config ARM64_64K_PAGES
 379         bool "64KB"
 380         help
 381           This feature enables 64KB pages support (4KB by default)
 382           allowing only two levels of page tables and faster TLB
 383           look-up. AArch32 emulation is not available when this feature
 384           is enabled.
 385
 386 endchoice
 387
 388 choice
 389         prompt "Virtual address space size"
 390         default ARM64_VA_BITS_39 if ARM64_4K_PAGES
 391         default ARM64_VA_BITS_42 if ARM64_64K_PAGES
 392         help
 393           Allows choosing one of multiple possible virtual address
 394           space sizes. The level of translation table is determined by
 395           a combination of page size and virtual address space size.
 396
 397 config ARM64_VA_BITS_39
 398         bool "39-bit"
 399         depends on ARM64_4K_PAGES
 400
 401 config ARM64_VA_BITS_42
 402         bool "42-bit"
 403         depends on ARM64_64K_PAGES
 404
 405 config ARM64_VA_BITS_48
 406         bool "48-bit"
 407
 408 endchoice
 409
 410 config ARM64_VA_BITS
 411         int
 412         default 39 if ARM64_VA_BITS_39
 413         default 42 if ARM64_VA_BITS_42
 414         default 48 if ARM64_VA_BITS_48
 415
 416 config ARM64_PGTABLE_LEVELS
 417         int
 418         default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
 419         default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
 420         default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
 421         default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
 422
 423 config CPU_BIG_ENDIAN
 424        bool "Build big-endian kernel"
 425        help
 426          Say Y if you plan on running a kernel in big-endian mode.
 427
 428 config SMP
 429         bool "Symmetric Multi-Processing"
 430         help
 431           This enables support for systems with more than one CPU.  If
 432           you say N here, the kernel will run on single and
 433           multiprocessor machines, but will use only one CPU of a
 434           multiprocessor machine. If you say Y here, the kernel will run
 435           on many, but not all, single processor machines. On a single
 436           processor machine, the kernel will run faster if you say N
 437           here.
 438
 439           If you don't know what to do here, say N.
 440
 441 config SCHED_MC
 442         bool "Multi-core scheduler support"
 443         depends on SMP
 444         help
 445           Multi-core scheduler support improves the CPU scheduler's decision
 446           making when dealing with multi-core CPU chips at a cost of slightly
 447           increased overhead in some places. If unsure say N here.
 448
 449 config SCHED_SMT
 450         bool "SMT scheduler support"
 451         depends on SMP
 452         help
 453           Improves the CPU scheduler's decision making when dealing with
 454           MultiThreading at a cost of slightly increased overhead in some
 455           places. If unsure say N here.
 456
 457 config NR_CPUS
 458         int "Maximum number of CPUs (2-64)"
 459         range 2 64
 460         depends on SMP
 461         # These have to remain sorted largest to smallest
 462         default "64"
 463
 464 config HOTPLUG_CPU
 465         bool "Support for hot-pluggable CPUs"
 466         depends on SMP
 467         help
 468           Say Y here to experiment with turning CPUs off and on.  CPUs
 469           can be controlled through /sys/devices/system/cpu.
 470
 471 source kernel/Kconfig.preempt
 472
 473 config HZ
 474         int
 475         default 100
 476
 477 config ARCH_HAS_HOLES_MEMORYMODEL
 478         def_bool y if SPARSEMEM
 479
 480 config ARCH_SPARSEMEM_ENABLE
 481         def_bool y
 482         select SPARSEMEM_VMEMMAP_ENABLE
 483
 484 config ARCH_SPARSEMEM_DEFAULT
 485         def_bool ARCH_SPARSEMEM_ENABLE
 486
 487 config ARCH_SELECT_MEMORY_MODEL
 488         def_bool ARCH_SPARSEMEM_ENABLE
 489
 490 config HAVE_ARCH_PFN_VALID
 491         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 492
 493 config HW_PERF_EVENTS
 494         bool "Enable hardware performance counter support for perf events"
 495         depends on PERF_EVENTS
 496         default y
 497         help
 498           Enable hardware performance counter support for perf events. If
 499           disabled, perf events will use software events only.
 500
 501 config SYS_SUPPORTS_HUGETLBFS
 502         def_bool y
 503
 504 config ARCH_WANT_GENERAL_HUGETLB
 505         def_bool y
 506
 507 config ARCH_WANT_HUGE_PMD_SHARE
 508         def_bool y if !ARM64_64K_PAGES
 509
 510 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
 511         def_bool y
 512
 513 config ARCH_HAS_CACHE_LINE_SIZE
 514         def_bool y
 515
 516 source "mm/Kconfig"
 517
 518 config SECCOMP
 519         bool "Enable seccomp to safely compute untrusted bytecode"
 520         ---help---
 521           This kernel feature is useful for number crunching applications
 522           that may need to compute untrusted bytecode during their
 523           execution. By using pipes or other transports made available to
 524           the process as file descriptors supporting the read/write
 525           syscalls, it's possible to isolate those applications in
 526           their own address space using seccomp. Once seccomp is
 527           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
 528           and the task is only allowed to execute a few safe syscalls
 529           defined by each seccomp mode.
 530
 531 config XEN_DOM0
 532         def_bool y
 533         depends on XEN
 534
 535 config XEN
 536         bool "Xen guest support on ARM64"
 537         depends on ARM64 && OF
 538         select SWIOTLB_XEN
 539         help
 540           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
 541
 542 config FORCE_MAX_ZONEORDER
 543         int
 544         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
 545         default "11"
 546
 547 menuconfig ARMV8_DEPRECATED
 548         bool "Emulate deprecated/obsolete ARMv8 instructions"
 549         depends on COMPAT
 550         help
 551           Legacy software support may require certain instructions
 552           that have been deprecated or obsoleted in the architecture.
 553
 554           Enable this config to enable selective emulation of these
 555           features.
 556
 557           If unsure, say Y
 558
 559 if ARMV8_DEPRECATED
 560
 561 config SWP_EMULATION
 562         bool "Emulate SWP/SWPB instructions"
 563         help
 564           ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that
 565           they are always undefined. Say Y here to enable software
 566           emulation of these instructions for userspace using LDXR/STXR.
 567
 568           In some older versions of glibc [<=2.8] SWP is used during futex
 569           trylock() operations with the assumption that the code will not
 570           be preempted. This invalid assumption may be more likely to fail
 571           with SWP emulation enabled, leading to deadlock of the user
 572           application.
 573
 574           NOTE: when accessing uncached shared regions, LDXR/STXR rely
 575           on an external transaction monitoring block called a global
 576           monitor to maintain update atomicity. If your system does not
 577           implement a global monitor, this option can cause programs that
 578           perform SWP operations to uncached memory to deadlock.
 579
 580           If unsure, say Y
 581
 582 config CP15_BARRIER_EMULATION
 583         bool "Emulate CP15 Barrier instructions"
 584         help
 585           The CP15 barrier instructions - CP15ISB, CP15DSB, and
 586           CP15DMB - are deprecated in ARMv8 (and ARMv7). It is
 587           strongly recommended to use the ISB, DSB, and DMB
 588           instructions instead.
 589
 590           Say Y here to enable software emulation of these
 591           instructions for AArch32 userspace code. When this option is
 592           enabled, CP15 barrier usage is traced which can help
 593           identify software that needs updating.
 594
 595           If unsure, say Y
 596
 597 config SETEND_EMULATION
 598         bool "Emulate SETEND instruction"
 599         help
 600           The SETEND instruction alters the data-endianness of the
 601           AArch32 EL0, and is deprecated in ARMv8.
 602
 603           Say Y here to enable software emulation of the instruction
 604           for AArch32 userspace code.
 605
 606           Note: All the cpus on the system must have mixed endian support at EL0
 607           for this feature to be enabled. If a new CPU - which doesn't support mixed
 608           endian - is hotplugged in after this feature has been enabled, there could
 609           be unexpected results in the applications.
 610
 611           If unsure, say Y
 612 endif
 613
 614 endmenu
 615
 616 menu "Boot options"
 617
 618 config CMDLINE
 619         string "Default kernel command string"
 620         default ""
 621         help
 622           Provide a set of default command-line options at build time by
 623           entering them here. As a minimum, you should specify the the
 624           root device (e.g. root=/dev/nfs).
 625
 626 config CMDLINE_FORCE
 627         bool "Always use the default kernel command string"
 628         help
 629           Always use the default kernel command string, even if the boot
 630           loader passes other arguments to the kernel.
 631           This is useful if you cannot or don't want to change the
 632           command-line options your boot loader passes to the kernel.
 633
 634 config EFI_STUB
 635         bool
 636
 637 config EFI
 638         bool "UEFI runtime support"
 639         depends on OF && !CPU_BIG_ENDIAN
 640         select LIBFDT
 641         select UCS2_STRING
 642         select EFI_PARAMS_FROM_FDT
 643         select EFI_RUNTIME_WRAPPERS
 644         select EFI_STUB
 645         select EFI_ARMSTUB
 646         default y
 647         help
 648           This option provides support for runtime services provided
 649           by UEFI firmware (such as non-volatile variables, realtime
 650           clock, and platform reset). A UEFI stub is also provided to
 651           allow the kernel to be booted as an EFI application. This
 652           is only useful on systems that have UEFI firmware.
 653
 654 config DMI
 655         bool "Enable support for SMBIOS (DMI) tables"
 656         depends on EFI
 657         default y
 658         help
 659           This enables SMBIOS/DMI feature for systems.
 660
 661           This option is only useful on systems that have UEFI firmware.
 662           However, even with this option, the resultant kernel should
 663           continue to boot on existing non-UEFI platforms.
 664
 665 endmenu
 666
 667 menu "Userspace binary formats"
 668
 669 source "fs/Kconfig.binfmt"
 670
 671 config COMPAT
 672         bool "Kernel support for 32-bit EL0"
 673         depends on !ARM64_64K_PAGES
 674         select COMPAT_BINFMT_ELF
 675         select HAVE_UID16
 676         select OLD_SIGSUSPEND3
 677         select COMPAT_OLD_SIGACTION
 678         help
 679           This option enables support for a 32-bit EL0 running under a 64-bit
 680           kernel at EL1. AArch32-specific components such as system calls,
 681           the user helper functions, VFP support and the ptrace interface are
 682           handled appropriately by the kernel.
 683
 684           If you want to execute 32-bit userspace applications, say Y.
 685
 686 config SYSVIPC_COMPAT
 687         def_bool y
 688         depends on COMPAT && SYSVIPC
 689
 690 endmenu
 691
 692 menu "Power management options"
 693
 694 source "kernel/power/Kconfig"
 695
 696 config ARCH_SUSPEND_POSSIBLE
 697         def_bool y
 698
 699 endmenu
 700
 701 menu "CPU Power Management"
 702
 703 source "drivers/cpuidle/Kconfig"
 704
 705 source "drivers/cpufreq/Kconfig"
 706
 707 endmenu
 708
 709 source "net/Kconfig"
 710
 711 source "drivers/Kconfig"
 712
 713 source "drivers/firmware/Kconfig"
 714
 715 source "fs/Kconfig"
 716
 717 source "arch/arm64/kvm/Kconfig"
 718
 719 source "arch/arm64/Kconfig.debug"
 720
 721 source "security/Kconfig"
 722
 723 source "crypto/Kconfig"
 724 if CRYPTO
 725 source "arch/arm64/crypto/Kconfig"
 726 endif
 727
 728 source "lib/Kconfig"