arch/arm64/Kconfig

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