arch/arm64/Kconfig

   1 config ARM64
   2         def_bool y
   3         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
   4         select ARCH_SUPPORTS_ATOMIC_RMW
   5         select ARCH_WANT_OPTIONAL_GPIOLIB
   6         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
   7         select ARM_HAS_SG_CHAIN
   8         select ARCH_WANT_FRAME_POINTERS
   9         select ARM_AMBA
  10         select ARM_ARCH_TIMER
  11         select AUDIT_ARCH_COMPAT_GENERIC
  12         select CLONE_BACKWARDS
  13         select COMMON_CLK
  14         select ARM_GIC
  15         select GENERIC_CLOCKEVENTS
  16         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  17         select GENERIC_CPU_AUTOPROBE
  18         select GENERIC_IOMAP
  19         select GENERIC_IRQ_PROBE
  20         select GENERIC_IRQ_SHOW
  21         select GENERIC_SMP_IDLE_THREAD
  22         select GENERIC_TIME_VSYSCALL
  23         select HARDIRQS_SW_RESEND
  24         select HAVE_ARCH_JUMP_LABEL
  25         select HAVE_ARCH_AUDITSYSCALL
  26         select HAVE_ARCH_SECCOMP_FILTER
  27         select HAVE_ARCH_KGDB
  28         select HAVE_ARCH_TRACEHOOK
  29         select HAVE_C_RECORDMCOUNT
  30         select HAVE_DEBUG_BUGVERBOSE
  31         select HAVE_DEBUG_KMEMLEAK
  32         select HAVE_DMA_API_DEBUG
  33         select HAVE_DMA_ATTRS
  34         select HAVE_DYNAMIC_FTRACE
  35         select HAVE_FTRACE_MCOUNT_RECORD
  36         select HAVE_FUNCTION_TRACER
  37         select HAVE_FUNCTION_GRAPH_TRACER
  38         select HAVE_GENERIC_DMA_COHERENT
  39         select HAVE_GENERIC_HARDIRQS
  40         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  41         select HAVE_MEMBLOCK
  42         select HAVE_PERF_EVENTS
  43         select HAVE_SYSCALL_TRACEPOINTS
  44         select IRQ_DOMAIN
  45         select MODULES_USE_ELF_RELA
  46         select NO_BOOTMEM
  47         select OF
  48         select OF_EARLY_FLATTREE
  49         select OF_RESERVED_MEM
  50         select PERF_USE_VMALLOC
  51         select POWER_RESET
  52         select POWER_SUPPLY
  53         select RTC_LIB
  54         select SPARSE_IRQ
  55         select SYSCTL_EXCEPTION_TRACE
  56         help
  57           ARM 64-bit (AArch64) Linux support.
  58
  59 config ARM_HAS_SG_CHAIN
  60         def_bool y
  61
  62 config 64BIT
  63         def_bool y
  64
  65 config ARCH_PHYS_ADDR_T_64BIT
  66         def_bool y
  67
  68 config MMU
  69         def_bool y
  70
  71 config NO_IOPORT
  72         def_bool y
  73
  74 config STACKTRACE_SUPPORT
  75         def_bool y
  76
  77 config LOCKDEP_SUPPORT
  78         def_bool y
  79
  80 config TRACE_IRQFLAGS_SUPPORT
  81         def_bool y
  82
  83 config GENERIC_LOCKBREAK
  84         def_bool y
  85         depends on SMP && PREEMPT
  86
  87 config RWSEM_GENERIC_SPINLOCK
  88         def_bool y
  89
  90 config ARCH_HAS_CPUFREQ
  91         bool
  92         help
  93           Internal node to signify that the ARCH has CPUFREQ support
  94           and that the relevant menu configurations are displayed for
  95           it.
  96
  97 config GENERIC_HWEIGHT
  98         def_bool y
  99
 100 config GENERIC_CSUM
 101         def_bool y
 102
 103 config GENERIC_CALIBRATE_DELAY
 104         def_bool y
 105
 106 config ZONE_DMA
 107         def_bool y
 108
 109 config ARCH_DMA_ADDR_T_64BIT
 110         def_bool y
 111
 112 config NEED_DMA_MAP_STATE
 113         def_bool y
 114
 115 config NEED_SG_DMA_LENGTH
 116         def_bool y
 117
 118 config SWIOTLB
 119         def_bool y
 120
 121 config IOMMU_HELPER
 122         def_bool SWIOTLB
 123
 124 config ARM_ERRATA_824069
 125         bool "ARM errata: Cache line might not be marked as clean after a CleanShared snoop"
 126         depends on SMP
 127         help
 128           This option enables the workaround for erratum 824069
 129           affecting Cortex-A53 MPCore with two or more processors (r0p0..r0p2).
 130           If a Cortex-A53 processor is executing a store or PLDW instruction at the same time
 131           as a processor in another cluster is executing a cache maintenance operation
 132           to the same address, then this erratum might cause a clean cache line to be
 133           incorrectly marked as dirty. This workaround replaces all cache clean opeartion
 134           to clean & invalidate.
 135
 136 config KERNEL_MODE_NEON
 137         def_bool y
 138
 139 source "init/Kconfig"
 140
 141 source "kernel/Kconfig.freezer"
 142
 143 menu "Platform selection"
 144
 145 config ARCH_VEXPRESS
 146         bool "ARMv8 software model (Versatile Express)"
 147         select ARCH_REQUIRE_GPIOLIB
 148         select COMMON_CLK_VERSATILE
 149         select POWER_RESET_VEXPRESS
 150         select VEXPRESS_CONFIG
 151         help
 152           This enables support for the ARMv8 software model (Versatile
 153           Express).
 154
 155 config ARCH_MT6735
 156         bool "MediaTek MT6735"
 157         select GENERIC_TIME
 158         select GENERIC_CLOCKEVENTS
 159         select ARCH_HAS_CPUFREQ
 160         select ARM_AMBA
 161         select CPU_V7
 162         select HAVE_SMP
 163         select NEED_MACH_MEMORY_H
 164         select IRQ_DOMAIN
 165         select IRQ_DOMAIN_DEBUG
 166         select GENERIC_SCHED_CLOCK
 167         select MTK_SYSTRACKER
 168         select ARMV7_COMPAT
 169         select ARMV7_COMPAT_CPUINFO
 170         help
 171           This enable support for MediaTek MT6735
 172
 173 config ARCH_MT6735M
 174         bool "MediaTek MT6735M"
 175         select GENERIC_TIME
 176         select GENERIC_CLOCKEVENTS
 177         select ARCH_HAS_CPUFREQ
 178         select ARM_AMBA
 179         select CPU_V7
 180         select HAVE_SMP
 181         select NEED_MACH_MEMORY_H
 182         select IRQ_DOMAIN
 183         select IRQ_DOMAIN_DEBUG
 184         select GENERIC_SCHED_CLOCK
 185         select MTK_SYSTRACKER
 186         select ARMV7_COMPAT
 187         select ARMV7_COMPAT_CPUINFO
 188         help
 189           This enable support for MediaTek MT6735M
 190
 191 config ARCH_MT6753
 192         bool "MediaTek MT6735M"
 193         select GENERIC_TIME
 194         select GENERIC_CLOCKEVENTS
 195         select ARCH_HAS_CPUFREQ
 196         select ARM_AMBA
 197         select CPU_V7
 198         select HAVE_SMP
 199         select NEED_MACH_MEMORY_H
 200         select IRQ_DOMAIN
 201         select IRQ_DOMAIN_DEBUG
 202         select GENERIC_SCHED_CLOCK
 203         select MTK_SYSTRACKER
 204         select ARMV7_COMPAT
 205         select ARMV7_COMPAT_CPUINFO
 206         help
 207           This enable support for MediaTek MT6753
 208
 209 config ARCH_MT6752
 210         bool "MediaTek MT6752"
 211         select GENERIC_TIME
 212         select GENERIC_CLOCKEVENTS
 213         select ARCH_HAS_CPUFREQ
 214         select ARM_AMBA
 215         select CPU_V7
 216         select HAVE_SMP
 217         select NEED_MACH_MEMORY_H
 218         select IRQ_DOMAIN
 219         select IRQ_DOMAIN_DEBUG
 220         select GENERIC_SCHED_CLOCK
 221         select MTK_SYSTRACKER
 222         select MTK_L2C_SHARE
 223         select ARCH_REQUIRE_GPIOLIB
 224         select MTK_ETM
 225         select MTK_EIC
 226         select ARMV7_COMPAT
 227         select ARMV7_COMPAT_CPUINFO
 228         help
 229           This enable support for MediaTek MT6752
 230
 231 config ARCH_MT6795
 232         bool "MediaTek MT6795"
 233         select GENERIC_TIME
 234         select GENERIC_CLOCKEVENTS
 235         select ARCH_HAS_CPUFREQ
 236         select ARM_AMBA
 237         select CPU_V7
 238         select HAVE_SMP
 239         select NEED_MACH_MEMORY_H
 240         select FIQ_GLUE
 241         select IRQ_DOMAIN
 242         select IRQ_DOMAIN_DEBUG
 243         select GENERIC_SCHED_CLOCK
 244         select ARCH_REQUIRE_GPIOLIB
 245         select MTK_CIRQ
 246         select MTK_CPU_STRESS
 247         select MTK_SYSTRACKER
 248         select MTK_LASTPC
 249         select ARMV7_COMPAT
 250         select ARMV7_COMPAT_CPUINFO
 251         help
 252           This enable support for MediaTek MT6795
 253 endmenu
 254
 255 source "drivers/misc/mediatek/mach/Kconfig"
 256
 257 menu "Bus support"
 258
 259 config ARM_AMBA
 260         bool
 261
 262 endmenu
 263
 264 menu "Kernel Features"
 265
 266 config ARM64_64K_PAGES
 267         bool "Enable 64KB pages support"
 268         help
 269           This feature enables 64KB pages support (4KB by default)
 270           allowing only two levels of page tables and faster TLB
 271           look-up. AArch32 emulation is not available when this feature
 272           is enabled.
 273
 274 config SMP
 275         bool "Symmetric Multi-Processing"
 276         select USE_GENERIC_SMP_HELPERS
 277         help
 278           This enables support for systems with more than one CPU.  If
 279           you say N here, the kernel will run on single and
 280           multiprocessor machines, but will use only one CPU of a
 281           multiprocessor machine. If you say Y here, the kernel will run
 282           on many, but not all, single processor machines. On a single
 283           processor machine, the kernel will run faster if you say N
 284           here.
 285
 286           If you don't know what to do here, say N.
 287
 288 config ARM_CPU_TOPOLOGY
 289         bool "Support CPU topology definition"
 290         depends on SMP
 291         default y
 292         help
 293           Support CPU topology definition, based on configuration
 294           provided by the firmware.
 295
 296 config SCHED_MC
 297         bool "Multi-core scheduler support"
 298         depends on ARM_CPU_TOPOLOGY
 299         help
 300           Multi-core scheduler support improves the CPU scheduler's decision
 301           making when dealing with multi-core CPU chips at a cost of slightly
 302           increased overhead in some places. If unsure say N here.
 303
 304 config SCHED_SMT
 305         bool "SMT scheduler support"
 306         depends on ARM_CPU_TOPOLOGY
 307         help
 308           Improves the CPU scheduler's decision making when dealing with
 309           MultiThreading at a cost of slightly increased overhead in some
 310           places. If unsure say N here.
 311
 312 config DISABLE_CPU_SCHED_DOMAIN_BALANCE
 313         bool "(EXPERIMENTAL) Disable CPU level scheduler load-balancing"
 314         help
 315           Disables scheduler load-balancing at CPU sched domain level.
 316
 317 config SCHED_HMP
 318         bool "(EXPERIMENTAL) Heterogenous multiprocessor scheduling"
 319         depends on DISABLE_CPU_SCHED_DOMAIN_BALANCE && SCHED_MC && FAIR_GROUP_SCHED && !SCHED_AUTOGROUP
 320         help
 321           Experimental scheduler optimizations for heterogeneous platforms.
 322           Attempts to introspectively select task affinity to optimize power
 323           and performance. Basic support for multiple (>2) cpu types is in place,
 324           but it has only been tested with two types of cpus.
 325           There is currently no support for migration of task groups, hence
 326           !SCHED_AUTOGROUP. Furthermore, normal load-balancing must be disabled
 327           between cpus of different type (DISABLE_CPU_SCHED_DOMAIN_BALANCE).
 328
 329 config SCHED_HMP_PRIO_FILTER
 330         bool "(EXPERIMENTAL) Filter HMP migrations by task priority"
 331         depends on SCHED_HMP
 332         help
 333           Enables task priority based HMP migration filter. Any task with
 334           a NICE value above the threshold will always be on low-power cpus
 335           with less compute capacity.
 336
 337 config SCHED_HMP_PRIO_FILTER_VAL
 338         int "NICE priority threshold"
 339         default 5
 340         depends on SCHED_HMP_PRIO_FILTER
 341
 342 config HMP_FAST_CPU_MASK
 343         string "HMP scheduler fast CPU mask"
 344         depends on SCHED_HMP
 345         help
 346           Leave empty to use device tree information.
 347           Specify the cpuids of the fast CPUs in the system as a list string,
 348           e.g. cpuid 0+1 should be specified as 0-1.
 349
 350 config HMP_SLOW_CPU_MASK
 351         string "HMP scheduler slow CPU mask"
 352         depends on SCHED_HMP
 353         help
 354           Leave empty to use device tree information.
 355           Specify the cpuids of the slow CPUs in the system as a list string,
 356           e.g. cpuid 0+1 should be specified as 0-1.
 357
 358 config HMP_VARIABLE_SCALE
 359         bool "Allows changing the load tracking scale through sysfs"
 360         depends on SCHED_HMP
 361         help
 362           When turned on, this option exports the thresholds and load average
 363           period value for the load tracking patches through sysfs.
 364           The values can be modified to change the rate of load accumulation
 365           and the thresholds used for HMP migration.
 366           The load_avg_period_ms is the time in ms to reach a load average of
 367           0.5 for an idle task of 0 load average ratio that start a busy loop.
 368           The up_threshold and down_threshold is the value to go to a faster
 369           CPU or to go back to a slower cpu.
 370           The {up,down}_threshold are devided by 1024 before being compared
 371           to the load average.
 372           For examples, with load_avg_period_ms = 128 and up_threshold = 512,
 373           a running task with a load of 0 will be migrated to a bigger CPU after
 374           128ms, because after 128ms its load_avg_ratio is 0.5 and the real
 375           up_threshold is 0.5.
 376           This patch has the same behavior as changing the Y of the load
 377           average computation to
 378                 (1002/1024)^(LOAD_AVG_PERIOD/load_avg_period_ms)
 379           but it remove intermadiate overflows in computation.
 380
 381 config MET_SCHED_HMP
 382         bool "(EXPERIMENTAL) MET SCHED HMP Info"
 383         depends on SCHED_HMP_ENHANCEMENT
 384         depends on HMP_TRACER
 385         help
 386           MET SCHED HMP Info
 387
 388 config HMP_FREQUENCY_INVARIANT_SCALE
 389         bool "(EXPERIMENTAL) Frequency-Invariant Tracked Load for HMP"
 390         depends on HMP_VARIABLE_SCALE && CPU_FREQ
 391         depends on !ARCH_SCALE_INVARIANT_CPU_CAPACITY
 392         help
 393           Scales the current load contribution in line with the frequency
 394           of the CPU that the task was executed on.
 395           In this version, we use a simple linear scale derived from the
 396           maximum frequency reported by CPUFreq.
 397           Restricting tracked load to be scaled by the CPU's frequency
 398           represents the consumption of possible compute capacity
 399           (rather than consumption of actual instantaneous capacity as
 400           normal) and allows the HMP migration's simple threshold
 401           migration strategy to interact more predictably with CPUFreq's
 402           asynchronous compute capacity changes.
 403
 404 config SCHED_HMP_ENHANCEMENT
 405         bool "(EXPERIMENTAL) HMP Ennhancement"
 406         depends on SCHED_HMP
 407         help
 408           HMP Ennhancement
 409
 410 config HMP_TRACER
 411         bool "(EXPERIMENTAL) Profile HMP scheduler"
 412         depends on SCHED_HMP_ENHANCEMENT
 413         help
 414           Profile HMP scheduler
 415
 416 config HMP_DYNAMIC_THRESHOLD
 417         bool "(EXPERIMENTAL) Dynamically adjust task migration threshold"
 418         depends on SCHED_HMP_ENHANCEMENT
 419         help
 420           Dynamically adjust task migration threshold according to current system load
 421
 422 config HMP_GLOBAL_BALANCE
 423         bool "(EXPERIMENTAL) Enhance HMP global load balance"
 424         depends on SCHED_HMP_ENHANCEMENT
 425         help
 426           Enhance HMP global load balance
 427
 428 config HMP_TASK_ASSIGNMENT
 429         bool "(EXPERIMENTAL) Enhance HMP task assignment"
 430         depends on SCHED_HMP_ENHANCEMENT
 431         help
 432           Enhance HMP task assignment
 433
 434 config HMP_DISCARD_CFS_SELECTION_RESULT
 435         bool "(EXPERIMENTAL) Discard CFS runqueue selection result"
 436         depends on SCHED_HMP_ENHANCEMENT && HMP_TASK_ASSIGNMENT
 437         help
 438           Discard CFS runqueue selection result even if only one cluster exists
 439
 440 config HMP_PACK_SMALL_TASK
 441         bool "(EXPERIMENTAL) Packing Small Tasks"
 442         depends on SCHED_HMP_ENHANCEMENT
 443         help
 444                 This option enables Packing Small Tasks
 445
 446 config HMP_PACK_BUDDY_INFO
 447         bool "(EXPERIMENTAL) Packing Small Tasks Buddy Information Log"
 448         depends on SCHED_HMP_ENHANCEMENT && HMP_PACK_SMALL_TASK
 449         help
 450                 This option enables Packing Small Tasks Buddy Information Log
 451
 452 config HMP_LAZY_BALANCE
 453         bool "(EXPERIMENTAL) Lazy Balance"
 454         depends on SCHED_HMP_ENHANCEMENT && HMP_PACK_SMALL_TASK
 455         help
 456                 This option enables Lazy Balance
 457
 458 config HMP_POWER_AWARE_CONTROLLER
 459         bool "(EXPERIMENTAL) Power-aware Scheduler for b.L MP Controller"
 460         depends on SCHED_HMP_ENHANCEMENT && HMP_PACK_SMALL_TASK && HMP_LAZY_BALANCE
 461         help
 462                 Power-aware scheduler for b.L MP controller and status interface
 463
 464 config HEVTASK_INTERFACE
 465         bool "task status interface"
 466         help
 467           The option provide an interface to show task status
 468
 469 config ARCH_SCALE_INVARIANT_CPU_CAPACITY
 470         bool "(EXPERIMENTAL) Scale-Invariant CPU Compute Capacity Recording"
 471         depends on CPU_FREQ
 472         help
 473             Provides a new measure of maximum and instantaneous CPU compute
 474             capacity, derived from a table of relative compute performance
 475             for each core type present in the system. The table is an
 476             estimate and specific core performance may be different for
 477             any particular workload. The measure includes the relative
 478             performance and a linear scale of current to maximum frequency
 479             such that at maximum frequency (as expressed in the DTB) the
 480             reported compute capacity will be equal to the estimated
 481             performance from the table. Values range between 0 and 1023 where
 482             1023 is the highest capacity available in the system.
 483
 484 config NR_CPUS
 485         int "Maximum number of CPUs (2-32)"
 486         range 2 32
 487         depends on SMP
 488         default "4"
 489
 490 config SWP_EMULATE
 491         bool "Emulate SWP/SWPB instructions"
 492         help
 493           ARMv6 architecture deprecates use of the SWP/SWPB instructions. ARMv8
 494           oblosetes the use of SWP/SWPB instructions. ARMv7 multiprocessing
 495           extensions introduce the ability to disable these instructions,
 496           triggering an undefined instruction exception when executed. Say Y
 497           here to enable software emulation of these instructions for userspace
 498           (not kernel) using LDREX/STREX. Also creates /proc/cpu/swp_emulation
 499           for statistics.
 500
 501           In some older versions of glibc [<=2.8] SWP is used during futex
 502           trylock() operations with the assumption that the code will not
 503           be preempted. This invalid assumption may be more likely to fail
 504           with SWP emulation enabled, leading to deadlock of the user
 505           application.
 506
 507           NOTE: when accessing uncached shared regions, LDREX/STREX rely
 508           on an external transaction monitoring block called a global
 509           monitor to maintain update atomicity. If your system does not
 510           implement a global monitor, this option can cause programs that
 511           perform SWP operations to uncached memory to deadlock.
 512
 513           If unsure, say Y.
 514
 515 config HOTPLUG_CPU
 516         bool "Support for hot-pluggable CPUs"
 517         depends on SMP
 518         help
 519           Say Y here to experiment with turning CPUs off and on.  CPUs
 520           can be controlled through /sys/devices/system/cpu.
 521
 522 source kernel/Kconfig.preempt
 523
 524 config HZ
 525         int
 526         default 100
 527
 528 config ARCH_HAS_HOLES_MEMORYMODEL
 529         def_bool y if SPARSEMEM
 530
 531 config ARCH_SPARSEMEM_ENABLE
 532         def_bool y
 533         select SPARSEMEM_VMEMMAP_ENABLE
 534
 535 config ARCH_SPARSEMEM_DEFAULT
 536         def_bool ARCH_SPARSEMEM_ENABLE
 537
 538 config ARCH_SELECT_MEMORY_MODEL
 539         def_bool ARCH_SPARSEMEM_ENABLE
 540
 541 config HAVE_ARCH_PFN_VALID
 542         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 543
 544 config HW_PERF_EVENTS
 545         bool "Enable hardware performance counter support for perf events"
 546         depends on PERF_EVENTS
 547         default y
 548         help
 549           Enable hardware performance counter support for perf events. If
 550           disabled, perf events will use software events only.
 551
 552 config ARMV7_COMPAT
 553         bool "Kernel support for ARMv7 applications"
 554         depends on COMPAT
 555         select SWP_EMULATE
 556         help
 557          This option enables features that allow that ran on an ARMv7 or older
 558          processor to continue functioning.
 559
 560          If you want to execute ARMv7 applications, say Y
 561
 562 config ARMV7_COMPAT_CPUINFO
 563         bool "Report backwards compatible cpu features in /proc/cpuinfo"
 564         depends on ARMV7_COMPAT
 565         default y
 566         help
 567          This option makes /proc/cpuinfo list CPU features that an ARMv7 or
 568          earlier kernel would report, but are not optional on an ARMv8 or later
 569          processor.
 570
 571          If you want to execute ARMv7 applications, say Y
 572
 573 source "mm/Kconfig"
 574
 575 config SECCOMP
 576         bool "Enable seccomp to safely compute untrusted bytecode"
 577         ---help---
 578           This kernel feature is useful for number crunching applications
 579           that may need to compute untrusted bytecode during their
 580           execution. By using pipes or other transports made available to
 581           the process as file descriptors supporting the read/write
 582           syscalls, it's possible to isolate those applications in
 583           their own address space using seccomp. Once seccomp is
 584           enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
 585           and the task is only allowed to execute a few safe syscalls
 586           defined by each seccomp mode.
 587
 588
 589 endmenu
 590
 591 menu "Boot options"
 592
 593 config CMDLINE
 594         string "Default kernel command string"
 595         default ""
 596         help
 597           Provide a set of default command-line options at build time by
 598           entering them here. As a minimum, you should specify the the
 599           root device (e.g. root=/dev/nfs).
 600
 601 choice
 602         prompt "Kernel command line type" if CMDLINE != ""
 603         default CMDLINE_FROM_BOOTLOADER
 604
 605 config CMDLINE_FROM_BOOTLOADER
 606         bool "Use bootloader kernel arguments if available"
 607         help
 608           Uses the command-line options passed by the boot loader. If
 609           the boot loader doesn't provide any, the default kernel command
 610           string provided in CMDLINE will be used.
 611
 612 config CMDLINE_EXTEND
 613         bool "Extend bootloader kernel arguments"
 614         help
 615           The command-line arguments provided by the boot loader will be
 616           appended to the default kernel command string.
 617
 618 config CMDLINE_FORCE
 619         bool "Always use the default kernel command string"
 620         help
 621           Always use the default kernel command string, even if the boot
 622           loader passes other arguments to the kernel.
 623           This is useful if you cannot or don't want to change the
 624           command-line options your boot loader passes to the kernel.
 625 endchoice
 626
 627 config BUILD_ARM64_APPENDED_DTB_IMAGE
 628         bool "Build a concatenated Image.gz/dtb by default"
 629         depends on OF
 630         help
 631           Enabling this option will cause a concatenated Image.gz and list of
 632           DTBs to be built by default (instead of a standalone Image.gz.)
 633           The image will built in arch/arm64/boot/Image.gz-dtb
 634
 635 config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES
 636         string "Default dtb names"
 637         depends on BUILD_ARM64_APPENDED_DTB_IMAGE
 638         help
 639           Space separated list of names of dtbs to append when
 640           building a concatenated Image.gz-dtb.
 641
 642 endmenu
 643
 644 menu "CPU Power Management"
 645
 646 if ARCH_HAS_CPUFREQ
 647 source "drivers/cpufreq/Kconfig"
 648 endif
 649
 650 endmenu
 651
 652 menu "Userspace binary formats"
 653
 654 source "fs/Kconfig.binfmt"
 655
 656 config COMPAT
 657         bool "Kernel support for 32-bit EL0"
 658         depends on !ARM64_64K_PAGES
 659         select COMPAT_BINFMT_ELF
 660         select HAVE_UID16
 661         select OLD_SIGSUSPEND3
 662         select COMPAT_OLD_SIGACTION
 663         help
 664           This option enables support for a 32-bit EL0 running under a 64-bit
 665           kernel at EL1. AArch32-specific components such as system calls,
 666           the user helper functions, VFP support and the ptrace interface are
 667           handled appropriately by the kernel.
 668
 669           If you want to execute 32-bit userspace applications, say Y.
 670
 671 config SYSVIPC_COMPAT
 672         def_bool y
 673         depends on COMPAT && SYSVIPC
 674
 675 endmenu
 676
 677 menu "Power management options"
 678
 679 source "kernel/power/Kconfig"
 680
 681 config ARCH_SUSPEND_POSSIBLE
 682        depends on !ARCH_S5PC100
 683        depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
 684                CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK || ARM64
 685        def_bool y
 686
 687 config ARM64_CPU_SUSPEND
 688        def_bool PM_SLEEP
 689
 690 config ARCH_HIBERNATION_POSSIBLE
 691         bool
 692         depends on MMU
 693         default y if ARCH_SUSPEND_POSSIBLE
 694
 695 endmenu
 696
 697 source "net/Kconfig"
 698
 699 source "drivers/Kconfig"
 700
 701 source "fs/Kconfig"
 702
 703 source "arch/arm64/Kconfig.debug"
 704
 705 source "security/Kconfig"
 706
 707 source "crypto/Kconfig"
 708 if CRYPTO
 709 source "arch/arm64/crypto/Kconfig"
 710 endif
 711
 712 source "lib/Kconfig"
 713