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