arch/arm64/Kconfig

   1 config ARM64
   2         def_bool y
   3         select ACPI_GENERIC_GSI if ACPI
   4         select ACPI_REDUCED_HARDWARE_ONLY if ACPI
   5         select ARCH_BINFMT_ELF_RANDOMIZE_PIE
   6         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
   7         select ARCH_HAS_GCOV_PROFILE_ALL
   8         select ARCH_HAS_SG_CHAIN
   9         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  10         select ARCH_USE_CMPXCHG_LOCKREF
  11         select ARCH_SUPPORTS_ATOMIC_RMW
  12         select ARCH_WANT_OPTIONAL_GPIOLIB
  13         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
  14         select ARCH_WANT_FRAME_POINTERS
  15         select ARM_AMBA
  16         select ARM_ARCH_TIMER
  17         select ARM_GIC
  18         select AUDIT_ARCH_COMPAT_GENERIC
  19         select ARM_GIC_V2M if PCI_MSI
  20         select ARM_GIC_V3
  21         select ARM_GIC_V3_ITS if PCI_MSI
  22         select BUILDTIME_EXTABLE_SORT
  23         select CLONE_BACKWARDS
  24         select COMMON_CLK
  25         select CPU_PM if (SUSPEND || CPU_IDLE)
  26         select DCACHE_WORD_ACCESS
  27         select GENERIC_ALLOCATOR
  28         select GENERIC_CLOCKEVENTS
  29         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  30         select GENERIC_CPU_AUTOPROBE
  31         select GENERIC_EARLY_IOREMAP
  32         select GENERIC_IRQ_PROBE
  33         select GENERIC_IRQ_SHOW
  34         select GENERIC_PCI_IOMAP
  35         select GENERIC_SCHED_CLOCK
  36         select GENERIC_SMP_IDLE_THREAD
  37         select GENERIC_STRNCPY_FROM_USER
  38         select GENERIC_STRNLEN_USER
  39         select GENERIC_TIME_VSYSCALL
  40         select HANDLE_DOMAIN_IRQ
  41         select HARDIRQS_SW_RESEND
  42         select HAVE_ALIGNED_STRUCT_PAGE if SLUB
  43         select HAVE_ARCH_AUDITSYSCALL
  44         select HAVE_ARCH_BITREVERSE
  45         select HAVE_ARCH_JUMP_LABEL
  46         select HAVE_ARCH_KGDB
  47         select HAVE_ARCH_SECCOMP_FILTER
  48         select HAVE_ARCH_TRACEHOOK
  49         select HAVE_BPF_JIT
  50         select HAVE_C_RECORDMCOUNT
  51         select HAVE_CC_STACKPROTECTOR
  52         select HAVE_CMPXCHG_DOUBLE
  53         select HAVE_DEBUG_BUGVERBOSE
  54         select HAVE_DEBUG_KMEMLEAK
  55         select HAVE_DMA_API_DEBUG
  56         select HAVE_DMA_ATTRS
  57         select HAVE_DMA_CONTIGUOUS
  58         select HAVE_DYNAMIC_FTRACE
  59         select HAVE_EFFICIENT_UNALIGNED_ACCESS
  60         select HAVE_FTRACE_MCOUNT_RECORD
  61         select HAVE_FUNCTION_TRACER
  62         select HAVE_FUNCTION_GRAPH_TRACER
  63         select HAVE_GENERIC_DMA_COHERENT
  64         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  65         select HAVE_MEMBLOCK
  66         select HAVE_PATA_PLATFORM
  67         select HAVE_PERF_EVENTS
  68         select HAVE_PERF_REGS
  69         select HAVE_PERF_USER_STACK_DUMP
  70         select HAVE_RCU_TABLE_FREE
  71         select HAVE_SYSCALL_TRACEPOINTS
  72         select IRQ_DOMAIN
  73         select MODULES_USE_ELF_RELA
  74         select NO_BOOTMEM
  75         select OF
  76         select OF_EARLY_FLATTREE
  77         select OF_RESERVED_MEM
  78         select PERF_USE_VMALLOC
  79         select POWER_RESET
  80         select POWER_SUPPLY
  81         select RTC_LIB
  82         select SPARSE_IRQ
  83         select SYSCTL_EXCEPTION_TRACE
  84         select HAVE_CONTEXT_TRACKING
  85         help
  86           ARM 64-bit (AArch64) Linux support.
  87
  88 config 64BIT
  89         def_bool y
  90
  91 config ARCH_PHYS_ADDR_T_64BIT
  92         def_bool y
  93
  94 config MMU
  95         def_bool y
  96
  97 config NO_IOPORT_MAP
  98         def_bool y if !PCI
  99
 100 config STACKTRACE_SUPPORT
 101         def_bool y
 102
 103 config LOCKDEP_SUPPORT
 104         def_bool y
 105
 106 config TRACE_IRQFLAGS_SUPPORT
 107         def_bool y
 108
 109 config RWSEM_XCHGADD_ALGORITHM
 110         def_bool y
 111
 112 config GENERIC_HWEIGHT
 113         def_bool y
 114
 115 config GENERIC_CSUM
 116         def_bool y
 117
 118 config GENERIC_CALIBRATE_DELAY
 119         def_bool y
 120
 121 config ZONE_DMA
 122         def_bool y
 123
 124 config HAVE_GENERIC_RCU_GUP
 125         def_bool y
 126
 127 config ARCH_DMA_ADDR_T_64BIT
 128         def_bool y
 129
 130 config NEED_DMA_MAP_STATE
 131         def_bool y
 132
 133 config NEED_SG_DMA_LENGTH
 134         def_bool y
 135
 136 config SWIOTLB
 137         def_bool y
 138
 139 config IOMMU_HELPER
 140         def_bool SWIOTLB
 141
 142 config KERNEL_MODE_NEON
 143         def_bool y
 144
 145 config FIX_EARLYCON_MEM
 146         def_bool y
 147
 148 source "init/Kconfig"
 149
 150 source "kernel/Kconfig.freezer"
 151
 152 menu "Platform selection"
 153
 154 config ARCH_EXYNOS
 155         bool
 156         help
 157           This enables support for Samsung Exynos SoC family
 158
 159 config ARCH_EXYNOS7
 160         bool "ARMv8 based Samsung Exynos7"
 161         select ARCH_EXYNOS
 162         select COMMON_CLK_SAMSUNG
 163         select HAVE_S3C2410_WATCHDOG if WATCHDOG
 164         select HAVE_S3C_RTC if RTC_CLASS
 165         select PINCTRL
 166         select PINCTRL_EXYNOS
 167
 168         help
 169           This enables support for Samsung Exynos7 SoC family
 170
 171 config ARCH_FSL_LS2085A
 172         bool "Freescale LS2085A SOC"
 173         help
 174           This enables support for Freescale LS2085A SOC.
 175
 176 config ARCH_MEDIATEK
 177         bool "Mediatek MT65xx & MT81xx ARMv8 SoC"
 178         select ARM_GIC
 179         help
 180           Support for Mediatek MT65xx & MT81xx ARMv8 SoCs
 181
 182 config ARCH_SEATTLE
 183         bool "AMD Seattle SoC Family"
 184         help
 185           This enables support for AMD Seattle SOC Family
 186
 187 config ARCH_TEGRA
 188         bool "NVIDIA Tegra SoC Family"
 189         select ARCH_HAS_RESET_CONTROLLER
 190         select ARCH_REQUIRE_GPIOLIB
 191         select CLKDEV_LOOKUP
 192         select CLKSRC_MMIO
 193         select CLKSRC_OF
 194         select GENERIC_CLOCKEVENTS
 195         select HAVE_CLK
 196         select PINCTRL
 197         select RESET_CONTROLLER
 198         help
 199           This enables support for the NVIDIA Tegra SoC family.
 200
 201 config ARCH_TEGRA_132_SOC
 202         bool "NVIDIA Tegra132 SoC"
 203         depends on ARCH_TEGRA
 204         select PINCTRL_TEGRA124
 205         select USB_ULPI if USB_PHY
 206         select USB_ULPI_VIEWPORT if USB_PHY
 207         help
 208           Enable support for NVIDIA Tegra132 SoC, based on the Denver
 209           ARMv8 CPU.  The Tegra132 SoC is similar to the Tegra124 SoC,
 210           but contains an NVIDIA Denver CPU complex in place of
 211           Tegra124's "4+1" Cortex-A15 CPU complex.
 212
 213 config ARCH_THUNDER
 214         bool "Cavium Inc. Thunder SoC Family"
 215         help
 216           This enables support for Cavium's Thunder Family of SoCs.
 217
 218 config ARCH_VEXPRESS
 219         bool "ARMv8 software model (Versatile Express)"
 220         select ARCH_REQUIRE_GPIOLIB
 221         select COMMON_CLK_VERSATILE
 222         select POWER_RESET_VEXPRESS
 223         select VEXPRESS_CONFIG
 224         help
 225           This enables support for the ARMv8 software model (Versatile
 226           Express).
 227
 228 config ARCH_XGENE
 229         bool "AppliedMicro X-Gene SOC Family"
 230         help
 231           This enables support for AppliedMicro X-Gene SOC Family
 232
 233 endmenu
 234
 235 menu "Bus support"
 236
 237 config PCI
 238         bool "PCI support"
 239         help
 240           This feature enables support for PCI bus system. If you say Y
 241           here, the kernel will include drivers and infrastructure code
 242           to support PCI bus devices.
 243
 244 config PCI_DOMAINS
 245         def_bool PCI
 246
 247 config PCI_DOMAINS_GENERIC
 248         def_bool PCI
 249
 250 config PCI_SYSCALL
 251         def_bool PCI
 252
 253 source "drivers/pci/Kconfig"
 254 source "drivers/pci/pcie/Kconfig"
 255 source "drivers/pci/hotplug/Kconfig"
 256
 257 endmenu
 258
 259 menu "Kernel Features"
 260
 261 menu "ARM errata workarounds via the alternatives framework"
 262
 263 config ARM64_ERRATUM_826319
 264         bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted"
 265         default y
 266         help
 267           This option adds an alternative code sequence to work around ARM
 268           erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or
 269           AXI master interface and an L2 cache.
 270
 271           If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors
 272           and is unable to accept a certain write via this interface, it will
 273           not progress on read data presented on the read data channel and the
 274           system can deadlock.
 275
 276           The workaround promotes data cache clean instructions to
 277           data cache clean-and-invalidate.
 278           Please note that this does not necessarily enable the workaround,
 279           as it depends on the alternative framework, which will only patch
 280           the kernel if an affected CPU is detected.
 281
 282           If unsure, say Y.
 283
 284 config ARM64_ERRATUM_827319
 285         bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect"
 286         default y
 287         help
 288           This option adds an alternative code sequence to work around ARM
 289           erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI
 290           master interface and an L2 cache.
 291
 292           Under certain conditions this erratum can cause a clean line eviction
 293           to occur at the same time as another transaction to the same address
 294           on the AMBA 5 CHI interface, which can cause data corruption if the
 295           interconnect reorders the two transactions.
 296
 297           The workaround promotes data cache clean instructions to
 298           data cache clean-and-invalidate.
 299           Please note that this does not necessarily enable the workaround,
 300           as it depends on the alternative framework, which will only patch
 301           the kernel if an affected CPU is detected.
 302
 303           If unsure, say Y.
 304
 305 config ARM64_ERRATUM_824069
 306         bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop"
 307         default y
 308         help
 309           This option adds an alternative code sequence to work around ARM
 310           erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected
 311           to a coherent interconnect.
 312
 313           If a Cortex-A53 processor is executing a store or prefetch for
 314           write instruction at the same time as a processor in another
 315           cluster is executing a cache maintenance operation to the same
 316           address, then this erratum might cause a clean cache line to be
 317           incorrectly marked as dirty.
 318
 319           The workaround promotes data cache clean instructions to
 320           data cache clean-and-invalidate.
 321           Please note that this option does not necessarily enable the
 322           workaround, as it depends on the alternative framework, which will
 323           only patch the kernel if an affected CPU is detected.
 324
 325           If unsure, say Y.
 326
 327 config ARM64_ERRATUM_819472
 328         bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption"
 329         default y
 330         help
 331           This option adds an alternative code sequence to work around ARM
 332           erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache
 333           present when it is connected to a coherent interconnect.
 334
 335           If the processor is executing a load and store exclusive sequence at
 336           the same time as a processor in another cluster is executing a cache
 337           maintenance operation to the same address, then this erratum might
 338           cause data corruption.
 339
 340           The workaround promotes data cache clean instructions to
 341           data cache clean-and-invalidate.
 342           Please note that this does not necessarily enable the workaround,
 343           as it depends on the alternative framework, which will only patch
 344           the kernel if an affected CPU is detected.
 345
 346           If unsure, say Y.
 347
 348 config ARM64_ERRATUM_832075
 349         bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads"
 350         default y
 351         help
 352           This option adds an alternative code sequence to work around ARM
 353           erratum 832075 on Cortex-A57 parts up to r1p2.
 354
 355           Affected Cortex-A57 parts might deadlock when exclusive load/store
 356           instructions to Write-Back memory are mixed with Device loads.
 357
 358           The workaround is to promote device loads to use Load-Acquire
 359           semantics.
 360           Please note that this does not necessarily enable the workaround,
 361           as it depends on the alternative framework, which will only patch
 362           the kernel if an affected CPU is detected.
 363
 364           If unsure, say Y.
 365
 366 endmenu
 367
 368
 369 choice
 370         prompt "Page size"
 371         default ARM64_4K_PAGES
 372         help
 373           Page size (translation granule) configuration.
 374
 375 config ARM64_4K_PAGES
 376         bool "4KB"
 377         help
 378           This feature enables 4KB pages support.
 379
 380 config ARM64_64K_PAGES
 381         bool "64KB"
 382         help
 383           This feature enables 64KB pages support (4KB by default)
 384           allowing only two levels of page tables and faster TLB
 385           look-up. AArch32 emulation is not available when this feature
 386           is enabled.
 387
 388 endchoice
 389
 390 choice
 391         prompt "Virtual address space size"
 392         default ARM64_VA_BITS_39 if ARM64_4K_PAGES
 393         default ARM64_VA_BITS_42 if ARM64_64K_PAGES
 394         help
 395           Allows choosing one of multiple possible virtual address
 396           space sizes. The level of translation table is determined by
 397           a combination of page size and virtual address space size.
 398
 399 config ARM64_VA_BITS_39
 400         bool "39-bit"
 401         depends on ARM64_4K_PAGES
 402
 403 config ARM64_VA_BITS_42
 404         bool "42-bit"
 405         depends on ARM64_64K_PAGES
 406
 407 config ARM64_VA_BITS_48
 408         bool "48-bit"
 409
 410 endchoice
 411
 412 config ARM64_VA_BITS
 413         int
 414         default 39 if ARM64_VA_BITS_39
 415         default 42 if ARM64_VA_BITS_42
 416         default 48 if ARM64_VA_BITS_48
 417
 418 config ARM64_PGTABLE_LEVELS
 419         int
 420         default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
 421         default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
 422         default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
 423         default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
 424
 425 config CPU_BIG_ENDIAN
 426        bool "Build big-endian kernel"
 427        help
 428          Say Y if you plan on running a kernel in big-endian mode.
 429
 430 config SMP
 431         bool "Symmetric Multi-Processing"
 432         help
 433           This enables support for systems with more than one CPU.  If
 434           you say N here, the kernel will run on single and
 435           multiprocessor machines, but will use only one CPU of a
 436           multiprocessor machine. If you say Y here, the kernel will run
 437           on many, but not all, single processor machines. On a single
 438           processor machine, the kernel will run faster if you say N
 439           here.
 440
 441           If you don't know what to do here, say N.
 442
 443 config SCHED_MC
 444         bool "Multi-core scheduler support"
 445         depends on SMP
 446         help
 447           Multi-core scheduler support improves the CPU scheduler's decision
 448           making when dealing with multi-core CPU chips at a cost of slightly
 449           increased overhead in some places. If unsure say N here.
 450
 451 config SCHED_SMT
 452         bool "SMT scheduler support"
 453         depends on SMP
 454         help
 455           Improves the CPU scheduler's decision making when dealing with
 456           MultiThreading at a cost of slightly increased overhead in some
 457           places. If unsure say N here.
 458
 459 config NR_CPUS
 460         int "Maximum number of CPUs (2-64)"
 461         range 2 64
 462         depends on SMP
 463         # These have to remain sorted largest to smallest
 464         default "64"
 465
 466 config HOTPLUG_CPU
 467         bool "Support for hot-pluggable CPUs"
 468         depends on SMP
 469         help
 470           Say Y here to experiment with turning CPUs off and on.  CPUs
 471           can be controlled through /sys/devices/system/cpu.
 472
 473 source kernel/Kconfig.preempt
 474
 475 config HZ
 476         int
 477         default 100
 478
 479 config ARCH_HAS_HOLES_MEMORYMODEL
 480         def_bool y if SPARSEMEM
 481
 482 config ARCH_SPARSEMEM_ENABLE
 483         def_bool y
 484         select SPARSEMEM_VMEMMAP_ENABLE
 485
 486 config ARCH_SPARSEMEM_DEFAULT
 487         def_bool ARCH_SPARSEMEM_ENABLE
 488
 489 config ARCH_SELECT_MEMORY_MODEL
 490         def_bool ARCH_SPARSEMEM_ENABLE
 491
 492 config HAVE_ARCH_PFN_VALID
 493         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 494
 495 config HW_PERF_EVENTS
 496         bool "Enable hardware performance counter support for perf events"
 497         depends on PERF_EVENTS
 498         default y
 499         help
 500           Enable hardware performance counter support for perf events. If
 501           disabled, perf events will use software events only.
 502
 503 config SYS_SUPPORTS_HUGETLBFS
 504         def_bool y
 505
 506 config ARCH_WANT_GENERAL_HUGETLB
 507         def_bool y
 508
 509 config ARCH_WANT_HUGE_PMD_SHARE
 510         def_bool y if !ARM64_64K_PAGES
 511
 512 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
 513         def_bool y
 514
 515 config ARCH_HAS_CACHE_LINE_SIZE
 516         def_bool y
 517
 518 source "mm/Kconfig"
 519
 520 config SECCOMP
 521         bool "Enable seccomp to safely compute untrusted bytecode"
 522         ---help---
 523           This kernel feature is useful for number crunching applications
 524           that may need to compute untrusted bytecode during their
 525           execution. By using pipes or other transports made available to
 526           the process as file descriptors supporting the read/write
 527           syscalls, it's possible to isolate those applications in
 528           their own address space using seccomp. Once seccomp is
 529           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
 530           and the task is only allowed to execute a few safe syscalls
 531           defined by each seccomp mode.
 532
 533 config XEN_DOM0
 534         def_bool y
 535         depends on XEN
 536
 537 config XEN
 538         bool "Xen guest support on ARM64"
 539         depends on ARM64 && OF
 540         select SWIOTLB_XEN
 541         help
 542           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
 543
 544 config FORCE_MAX_ZONEORDER
 545         int
 546         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
 547         default "11"
 548
 549 menuconfig ARMV8_DEPRECATED
 550         bool "Emulate deprecated/obsolete ARMv8 instructions"
 551         depends on COMPAT
 552         help
 553           Legacy software support may require certain instructions
 554           that have been deprecated or obsoleted in the architecture.
 555
 556           Enable this config to enable selective emulation of these
 557           features.
 558
 559           If unsure, say Y
 560
 561 if ARMV8_DEPRECATED
 562
 563 config SWP_EMULATION
 564         bool "Emulate SWP/SWPB instructions"
 565         help
 566           ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that
 567           they are always undefined. Say Y here to enable software
 568           emulation of these instructions for userspace using LDXR/STXR.
 569
 570           In some older versions of glibc [<=2.8] SWP is used during futex
 571           trylock() operations with the assumption that the code will not
 572           be preempted. This invalid assumption may be more likely to fail
 573           with SWP emulation enabled, leading to deadlock of the user
 574           application.
 575
 576           NOTE: when accessing uncached shared regions, LDXR/STXR rely
 577           on an external transaction monitoring block called a global
 578           monitor to maintain update atomicity. If your system does not
 579           implement a global monitor, this option can cause programs that
 580           perform SWP operations to uncached memory to deadlock.
 581
 582           If unsure, say Y
 583
 584 config CP15_BARRIER_EMULATION
 585         bool "Emulate CP15 Barrier instructions"
 586         help
 587           The CP15 barrier instructions - CP15ISB, CP15DSB, and
 588           CP15DMB - are deprecated in ARMv8 (and ARMv7). It is
 589           strongly recommended to use the ISB, DSB, and DMB
 590           instructions instead.
 591
 592           Say Y here to enable software emulation of these
 593           instructions for AArch32 userspace code. When this option is
 594           enabled, CP15 barrier usage is traced which can help
 595           identify software that needs updating.
 596
 597           If unsure, say Y
 598
 599 config SETEND_EMULATION
 600         bool "Emulate SETEND instruction"
 601         help
 602           The SETEND instruction alters the data-endianness of the
 603           AArch32 EL0, and is deprecated in ARMv8.
 604
 605           Say Y here to enable software emulation of the instruction
 606           for AArch32 userspace code.
 607
 608           Note: All the cpus on the system must have mixed endian support at EL0
 609           for this feature to be enabled. If a new CPU - which doesn't support mixed
 610           endian - is hotplugged in after this feature has been enabled, there could
 611           be unexpected results in the applications.
 612
 613           If unsure, say Y
 614 endif
 615
 616 endmenu
 617
 618 menu "Boot options"
 619
 620 config CMDLINE
 621         string "Default kernel command string"
 622         default ""
 623         help
 624           Provide a set of default command-line options at build time by
 625           entering them here. As a minimum, you should specify the the
 626           root device (e.g. root=/dev/nfs).
 627
 628 config CMDLINE_FORCE
 629         bool "Always use the default kernel command string"
 630         help
 631           Always use the default kernel command string, even if the boot
 632           loader passes other arguments to the kernel.
 633           This is useful if you cannot or don't want to change the
 634           command-line options your boot loader passes to the kernel.
 635
 636 config EFI_STUB
 637         bool
 638
 639 config EFI
 640         bool "UEFI runtime support"
 641         depends on OF && !CPU_BIG_ENDIAN
 642         select LIBFDT
 643         select UCS2_STRING
 644         select EFI_PARAMS_FROM_FDT
 645         select EFI_RUNTIME_WRAPPERS
 646         select EFI_STUB
 647         select EFI_ARMSTUB
 648         default y
 649         help
 650           This option provides support for runtime services provided
 651           by UEFI firmware (such as non-volatile variables, realtime
 652           clock, and platform reset). A UEFI stub is also provided to
 653           allow the kernel to be booted as an EFI application. This
 654           is only useful on systems that have UEFI firmware.
 655
 656 config DMI
 657         bool "Enable support for SMBIOS (DMI) tables"
 658         depends on EFI
 659         default y
 660         help
 661           This enables SMBIOS/DMI feature for systems.
 662
 663           This option is only useful on systems that have UEFI firmware.
 664           However, even with this option, the resultant kernel should
 665           continue to boot on existing non-UEFI platforms.
 666
 667 endmenu
 668
 669 menu "Userspace binary formats"
 670
 671 source "fs/Kconfig.binfmt"
 672
 673 config COMPAT
 674         bool "Kernel support for 32-bit EL0"
 675         depends on !ARM64_64K_PAGES
 676         select COMPAT_BINFMT_ELF
 677         select HAVE_UID16
 678         select OLD_SIGSUSPEND3
 679         select COMPAT_OLD_SIGACTION
 680         help
 681           This option enables support for a 32-bit EL0 running under a 64-bit
 682           kernel at EL1. AArch32-specific components such as system calls,
 683           the user helper functions, VFP support and the ptrace interface are
 684           handled appropriately by the kernel.
 685
 686           If you want to execute 32-bit userspace applications, say Y.
 687
 688 config SYSVIPC_COMPAT
 689         def_bool y
 690         depends on COMPAT && SYSVIPC
 691
 692 endmenu
 693
 694 menu "Power management options"
 695
 696 source "kernel/power/Kconfig"
 697
 698 config ARCH_SUSPEND_POSSIBLE
 699         def_bool y
 700
 701 endmenu
 702
 703 menu "CPU Power Management"
 704
 705 source "drivers/cpuidle/Kconfig"
 706
 707 source "drivers/cpufreq/Kconfig"
 708
 709 endmenu
 710
 711 source "net/Kconfig"
 712
 713 source "drivers/Kconfig"
 714
 715 source "drivers/firmware/Kconfig"
 716
 717 source "drivers/acpi/Kconfig"
 718
 719 source "fs/Kconfig"
 720
 721 source "arch/arm64/kvm/Kconfig"
 722
 723 source "arch/arm64/Kconfig.debug"
 724
 725 source "security/Kconfig"
 726
 727 source "crypto/Kconfig"
 728 if CRYPTO
 729 source "arch/arm64/crypto/Kconfig"
 730 endif
 731
 732 source "lib/Kconfig"