arch/arm64/Kconfig

   1 config ARM64
   2         def_bool y
   3         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
   4         select ARCH_HAS_SG_CHAIN
   5         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
   6         select ARCH_USE_CMPXCHG_LOCKREF
   7         select ARCH_SUPPORTS_ATOMIC_RMW
   8         select ARCH_WANT_OPTIONAL_GPIOLIB
   9         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
  10         select ARCH_WANT_FRAME_POINTERS
  11         select ARM_AMBA
  12         select ARM_ARCH_TIMER
  13         select ARM_GIC
  14         select AUDIT_ARCH_COMPAT_GENERIC
  15         select ARM_GIC_V3
  16         select BUILDTIME_EXTABLE_SORT
  17         select CLONE_BACKWARDS
  18         select COMMON_CLK
  19         select CPU_PM if (SUSPEND || CPU_IDLE)
  20         select DCACHE_WORD_ACCESS
  21         select GENERIC_ALLOCATOR
  22         select GENERIC_CLOCKEVENTS
  23         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  24         select GENERIC_CPU_AUTOPROBE
  25         select GENERIC_EARLY_IOREMAP
  26         select GENERIC_IOMAP
  27         select GENERIC_IRQ_PROBE
  28         select GENERIC_IRQ_SHOW
  29         select GENERIC_SCHED_CLOCK
  30         select GENERIC_SMP_IDLE_THREAD
  31         select GENERIC_STRNCPY_FROM_USER
  32         select GENERIC_STRNLEN_USER
  33         select GENERIC_TIME_VSYSCALL
  34         select HANDLE_DOMAIN_IRQ
  35         select HARDIRQS_SW_RESEND
  36         select HAVE_ARCH_AUDITSYSCALL
  37         select HAVE_ARCH_JUMP_LABEL
  38         select HAVE_ARCH_KGDB
  39         select HAVE_ARCH_TRACEHOOK
  40         select HAVE_BPF_JIT
  41         select HAVE_C_RECORDMCOUNT
  42         select HAVE_CC_STACKPROTECTOR
  43         select HAVE_DEBUG_BUGVERBOSE
  44         select HAVE_DEBUG_KMEMLEAK
  45         select HAVE_DMA_API_DEBUG
  46         select HAVE_DMA_ATTRS
  47         select HAVE_DMA_CONTIGUOUS
  48         select HAVE_DYNAMIC_FTRACE
  49         select HAVE_EFFICIENT_UNALIGNED_ACCESS
  50         select HAVE_FTRACE_MCOUNT_RECORD
  51         select HAVE_FUNCTION_TRACER
  52         select HAVE_FUNCTION_GRAPH_TRACER
  53         select HAVE_GENERIC_DMA_COHERENT
  54         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  55         select HAVE_MEMBLOCK
  56         select HAVE_PATA_PLATFORM
  57         select HAVE_PERF_EVENTS
  58         select HAVE_PERF_REGS
  59         select HAVE_PERF_USER_STACK_DUMP
  60         select HAVE_RCU_TABLE_FREE
  61         select HAVE_SYSCALL_TRACEPOINTS
  62         select IRQ_DOMAIN
  63         select MODULES_USE_ELF_RELA
  64         select NO_BOOTMEM
  65         select OF
  66         select OF_EARLY_FLATTREE
  67         select OF_RESERVED_MEM
  68         select PERF_USE_VMALLOC
  69         select POWER_RESET
  70         select POWER_SUPPLY
  71         select RTC_LIB
  72         select SPARSE_IRQ
  73         select SYSCTL_EXCEPTION_TRACE
  74         select HAVE_CONTEXT_TRACKING
  75         help
  76           ARM 64-bit (AArch64) Linux support.
  77
  78 config 64BIT
  79         def_bool y
  80
  81 config ARCH_PHYS_ADDR_T_64BIT
  82         def_bool y
  83
  84 config MMU
  85         def_bool y
  86
  87 config NO_IOPORT_MAP
  88         def_bool y if !PCI
  89
  90 config STACKTRACE_SUPPORT
  91         def_bool y
  92
  93 config LOCKDEP_SUPPORT
  94         def_bool y
  95
  96 config TRACE_IRQFLAGS_SUPPORT
  97         def_bool y
  98
  99 config RWSEM_XCHGADD_ALGORITHM
 100         def_bool y
 101
 102 config GENERIC_HWEIGHT
 103         def_bool y
 104
 105 config GENERIC_CSUM
 106         def_bool y
 107
 108 config GENERIC_CALIBRATE_DELAY
 109         def_bool y
 110
 111 config ZONE_DMA
 112         def_bool y
 113
 114 config HAVE_GENERIC_RCU_GUP
 115         def_bool y
 116
 117 config ARCH_DMA_ADDR_T_64BIT
 118         def_bool y
 119
 120 config NEED_DMA_MAP_STATE
 121         def_bool y
 122
 123 config NEED_SG_DMA_LENGTH
 124         def_bool y
 125
 126 config SWIOTLB
 127         def_bool y
 128
 129 config IOMMU_HELPER
 130         def_bool SWIOTLB
 131
 132 config KERNEL_MODE_NEON
 133         def_bool y
 134
 135 config FIX_EARLYCON_MEM
 136         def_bool y
 137
 138 source "init/Kconfig"
 139
 140 source "kernel/Kconfig.freezer"
 141
 142 menu "Platform selection"
 143
 144 config ARCH_THUNDER
 145         bool "Cavium Inc. Thunder SoC Family"
 146         help
 147           This enables support for Cavium's Thunder Family of SoCs.
 148
 149 config ARCH_VEXPRESS
 150         bool "ARMv8 software model (Versatile Express)"
 151         select ARCH_REQUIRE_GPIOLIB
 152         select COMMON_CLK_VERSATILE
 153         select POWER_RESET_VEXPRESS
 154         select VEXPRESS_CONFIG
 155         help
 156           This enables support for the ARMv8 software model (Versatile
 157           Express).
 158
 159 config ARCH_XGENE
 160         bool "AppliedMicro X-Gene SOC Family"
 161         help
 162           This enables support for AppliedMicro X-Gene SOC Family
 163
 164 endmenu
 165
 166 menu "Bus support"
 167
 168 config ARM_AMBA
 169         bool
 170
 171 config PCI
 172         bool "PCI support"
 173         help
 174           This feature enables support for PCI bus system. If you say Y
 175           here, the kernel will include drivers and infrastructure code
 176           to support PCI bus devices.
 177
 178 config PCI_DOMAINS
 179         def_bool PCI
 180
 181 config PCI_DOMAINS_GENERIC
 182         def_bool PCI
 183
 184 config PCI_SYSCALL
 185         def_bool PCI
 186
 187 source "drivers/pci/Kconfig"
 188 source "drivers/pci/pcie/Kconfig"
 189 source "drivers/pci/hotplug/Kconfig"
 190
 191 endmenu
 192
 193 menu "Kernel Features"
 194
 195 choice
 196         prompt "Page size"
 197         default ARM64_4K_PAGES
 198         help
 199           Page size (translation granule) configuration.
 200
 201 config ARM64_4K_PAGES
 202         bool "4KB"
 203         help
 204           This feature enables 4KB pages support.
 205
 206 config ARM64_64K_PAGES
 207         bool "64KB"
 208         help
 209           This feature enables 64KB pages support (4KB by default)
 210           allowing only two levels of page tables and faster TLB
 211           look-up. AArch32 emulation is not available when this feature
 212           is enabled.
 213
 214 endchoice
 215
 216 choice
 217         prompt "Virtual address space size"
 218         default ARM64_VA_BITS_39 if ARM64_4K_PAGES
 219         default ARM64_VA_BITS_42 if ARM64_64K_PAGES
 220         help
 221           Allows choosing one of multiple possible virtual address
 222           space sizes. The level of translation table is determined by
 223           a combination of page size and virtual address space size.
 224
 225 config ARM64_VA_BITS_39
 226         bool "39-bit"
 227         depends on ARM64_4K_PAGES
 228
 229 config ARM64_VA_BITS_42
 230         bool "42-bit"
 231         depends on ARM64_64K_PAGES
 232
 233 config ARM64_VA_BITS_48
 234         bool "48-bit"
 235         depends on BROKEN
 236
 237 endchoice
 238
 239 config ARM64_VA_BITS
 240         int
 241         default 39 if ARM64_VA_BITS_39
 242         default 42 if ARM64_VA_BITS_42
 243         default 48 if ARM64_VA_BITS_48
 244
 245 config ARM64_PGTABLE_LEVELS
 246         int
 247         default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
 248         default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
 249         default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
 250         default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
 251
 252 config CPU_BIG_ENDIAN
 253        bool "Build big-endian kernel"
 254        help
 255          Say Y if you plan on running a kernel in big-endian mode.
 256
 257 config SMP
 258         bool "Symmetric Multi-Processing"
 259         help
 260           This enables support for systems with more than one CPU.  If
 261           you say N here, the kernel will run on single and
 262           multiprocessor machines, but will use only one CPU of a
 263           multiprocessor machine. If you say Y here, the kernel will run
 264           on many, but not all, single processor machines. On a single
 265           processor machine, the kernel will run faster if you say N
 266           here.
 267
 268           If you don't know what to do here, say N.
 269
 270 config SCHED_MC
 271         bool "Multi-core scheduler support"
 272         depends on SMP
 273         help
 274           Multi-core scheduler support improves the CPU scheduler's decision
 275           making when dealing with multi-core CPU chips at a cost of slightly
 276           increased overhead in some places. If unsure say N here.
 277
 278 config SCHED_SMT
 279         bool "SMT scheduler support"
 280         depends on SMP
 281         help
 282           Improves the CPU scheduler's decision making when dealing with
 283           MultiThreading at a cost of slightly increased overhead in some
 284           places. If unsure say N here.
 285
 286 config NR_CPUS
 287         int "Maximum number of CPUs (2-64)"
 288         range 2 64
 289         depends on SMP
 290         # These have to remain sorted largest to smallest
 291         default "64"
 292
 293 config HOTPLUG_CPU
 294         bool "Support for hot-pluggable CPUs"
 295         depends on SMP
 296         help
 297           Say Y here to experiment with turning CPUs off and on.  CPUs
 298           can be controlled through /sys/devices/system/cpu.
 299
 300 source kernel/Kconfig.preempt
 301
 302 config HZ
 303         int
 304         default 100
 305
 306 config ARCH_HAS_HOLES_MEMORYMODEL
 307         def_bool y if SPARSEMEM
 308
 309 config ARCH_SPARSEMEM_ENABLE
 310         def_bool y
 311         select SPARSEMEM_VMEMMAP_ENABLE
 312
 313 config ARCH_SPARSEMEM_DEFAULT
 314         def_bool ARCH_SPARSEMEM_ENABLE
 315
 316 config ARCH_SELECT_MEMORY_MODEL
 317         def_bool ARCH_SPARSEMEM_ENABLE
 318
 319 config HAVE_ARCH_PFN_VALID
 320         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 321
 322 config HW_PERF_EVENTS
 323         bool "Enable hardware performance counter support for perf events"
 324         depends on PERF_EVENTS
 325         default y
 326         help
 327           Enable hardware performance counter support for perf events. If
 328           disabled, perf events will use software events only.
 329
 330 config SYS_SUPPORTS_HUGETLBFS
 331         def_bool y
 332
 333 config ARCH_WANT_GENERAL_HUGETLB
 334         def_bool y
 335
 336 config ARCH_WANT_HUGE_PMD_SHARE
 337         def_bool y if !ARM64_64K_PAGES
 338
 339 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
 340         def_bool y
 341
 342 config ARCH_HAS_CACHE_LINE_SIZE
 343         def_bool y
 344
 345 source "mm/Kconfig"
 346
 347 config XEN_DOM0
 348         def_bool y
 349         depends on XEN
 350
 351 config XEN
 352         bool "Xen guest support on ARM64 (EXPERIMENTAL)"
 353         depends on ARM64 && OF
 354         select SWIOTLB_XEN
 355         help
 356           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
 357
 358 config FORCE_MAX_ZONEORDER
 359         int
 360         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
 361         default "11"
 362
 363 endmenu
 364
 365 menu "Boot options"
 366
 367 config CMDLINE
 368         string "Default kernel command string"
 369         default ""
 370         help
 371           Provide a set of default command-line options at build time by
 372           entering them here. As a minimum, you should specify the the
 373           root device (e.g. root=/dev/nfs).
 374
 375 config CMDLINE_FORCE
 376         bool "Always use the default kernel command string"
 377         help
 378           Always use the default kernel command string, even if the boot
 379           loader passes other arguments to the kernel.
 380           This is useful if you cannot or don't want to change the
 381           command-line options your boot loader passes to the kernel.
 382
 383 config EFI_STUB
 384         bool
 385
 386 config EFI
 387         bool "UEFI runtime support"
 388         depends on OF && !CPU_BIG_ENDIAN
 389         select LIBFDT
 390         select UCS2_STRING
 391         select EFI_PARAMS_FROM_FDT
 392         select EFI_RUNTIME_WRAPPERS
 393         select EFI_STUB
 394         select EFI_ARMSTUB
 395         default y
 396         help
 397           This option provides support for runtime services provided
 398           by UEFI firmware (such as non-volatile variables, realtime
 399           clock, and platform reset). A UEFI stub is also provided to
 400           allow the kernel to be booted as an EFI application. This
 401           is only useful on systems that have UEFI firmware.
 402
 403 endmenu
 404
 405 menu "Userspace binary formats"
 406
 407 source "fs/Kconfig.binfmt"
 408
 409 config COMPAT
 410         bool "Kernel support for 32-bit EL0"
 411         depends on !ARM64_64K_PAGES
 412         select COMPAT_BINFMT_ELF
 413         select HAVE_UID16
 414         select OLD_SIGSUSPEND3
 415         select COMPAT_OLD_SIGACTION
 416         help
 417           This option enables support for a 32-bit EL0 running under a 64-bit
 418           kernel at EL1. AArch32-specific components such as system calls,
 419           the user helper functions, VFP support and the ptrace interface are
 420           handled appropriately by the kernel.
 421
 422           If you want to execute 32-bit userspace applications, say Y.
 423
 424 config SYSVIPC_COMPAT
 425         def_bool y
 426         depends on COMPAT && SYSVIPC
 427
 428 endmenu
 429
 430 menu "Power management options"
 431
 432 source "kernel/power/Kconfig"
 433
 434 config ARCH_SUSPEND_POSSIBLE
 435         def_bool y
 436
 437 config ARM64_CPU_SUSPEND
 438         def_bool PM_SLEEP
 439
 440 endmenu
 441
 442 menu "CPU Power Management"
 443
 444 source "drivers/cpuidle/Kconfig"
 445
 446 source "drivers/cpufreq/Kconfig"
 447
 448 endmenu
 449
 450 source "net/Kconfig"
 451
 452 source "drivers/Kconfig"
 453
 454 source "drivers/firmware/Kconfig"
 455
 456 source "fs/Kconfig"
 457
 458 source "arch/arm64/kvm/Kconfig"
 459
 460 source "arch/arm64/Kconfig.debug"
 461
 462 source "security/Kconfig"
 463
 464 source "crypto/Kconfig"
 465 if CRYPTO
 466 source "arch/arm64/crypto/Kconfig"
 467 endif
 468
 469 source "lib/Kconfig"