arch/arm64/Kconfig

   1 config ARM64
   2         def_bool y
   3         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
   4         select ARCH_USE_CMPXCHG_LOCKREF
   5         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
   6         select ARCH_WANT_OPTIONAL_GPIOLIB
   7         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
   8         select ARCH_WANT_FRAME_POINTERS
   9         select ARM_AMBA
  10         select ARM_ARCH_TIMER
  11         select ARM_GIC
  12         select BUILDTIME_EXTABLE_SORT
  13         select CLONE_BACKWARDS
  14         select COMMON_CLK
  15         select CPU_PM if (SUSPEND || CPU_IDLE)
  16         select DCACHE_WORD_ACCESS
  17         select GENERIC_CLOCKEVENTS
  18         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  19         select GENERIC_CPU_AUTOPROBE
  20         select GENERIC_EARLY_IOREMAP
  21         select GENERIC_IOMAP
  22         select GENERIC_IRQ_PROBE
  23         select GENERIC_IRQ_SHOW
  24         select GENERIC_SCHED_CLOCK
  25         select GENERIC_SMP_IDLE_THREAD
  26         select GENERIC_STRNCPY_FROM_USER
  27         select GENERIC_STRNLEN_USER
  28         select GENERIC_TIME_VSYSCALL
  29         select HARDIRQS_SW_RESEND
  30         select HAVE_ARCH_JUMP_LABEL
  31         select HAVE_ARCH_KGDB
  32         select HAVE_ARCH_TRACEHOOK
  33         select HAVE_C_RECORDMCOUNT
  34         select HAVE_DEBUG_BUGVERBOSE
  35         select HAVE_DEBUG_KMEMLEAK
  36         select HAVE_DMA_API_DEBUG
  37         select HAVE_DMA_ATTRS
  38         select HAVE_DMA_CONTIGUOUS
  39         select HAVE_EFFICIENT_UNALIGNED_ACCESS
  40         select HAVE_FTRACE_MCOUNT_RECORD
  41         select HAVE_FUNCTION_TRACER
  42         select HAVE_FUNCTION_GRAPH_TRACER
  43         select HAVE_GENERIC_DMA_COHERENT
  44         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  45         select HAVE_MEMBLOCK
  46         select HAVE_PATA_PLATFORM
  47         select HAVE_PERF_EVENTS
  48         select HAVE_PERF_REGS
  49         select HAVE_PERF_USER_STACK_DUMP
  50         select IRQ_DOMAIN
  51         select MODULES_USE_ELF_RELA
  52         select NO_BOOTMEM
  53         select OF
  54         select OF_EARLY_FLATTREE
  55         select OF_RESERVED_MEM
  56         select PERF_USE_VMALLOC
  57         select POWER_RESET
  58         select POWER_SUPPLY
  59         select RTC_LIB
  60         select SPARSE_IRQ
  61         select SYSCTL_EXCEPTION_TRACE
  62         help
  63           ARM 64-bit (AArch64) Linux support.
  64
  65 config 64BIT
  66         def_bool y
  67
  68 config ARCH_PHYS_ADDR_T_64BIT
  69         def_bool y
  70
  71 config MMU
  72         def_bool y
  73
  74 config NO_IOPORT_MAP
  75         def_bool y
  76
  77 config STACKTRACE_SUPPORT
  78         def_bool y
  79
  80 config LOCKDEP_SUPPORT
  81         def_bool y
  82
  83 config TRACE_IRQFLAGS_SUPPORT
  84         def_bool y
  85
  86 config RWSEM_XCHGADD_ALGORITHM
  87         def_bool y
  88
  89 config GENERIC_HWEIGHT
  90         def_bool y
  91
  92 config GENERIC_CSUM
  93         def_bool y
  94
  95 config GENERIC_CALIBRATE_DELAY
  96         def_bool y
  97
  98 config ZONE_DMA
  99         def_bool y
 100
 101 config ARCH_DMA_ADDR_T_64BIT
 102         def_bool y
 103
 104 config NEED_DMA_MAP_STATE
 105         def_bool y
 106
 107 config NEED_SG_DMA_LENGTH
 108         def_bool y
 109
 110 config SWIOTLB
 111         def_bool y
 112
 113 config IOMMU_HELPER
 114         def_bool SWIOTLB
 115
 116 config KERNEL_MODE_NEON
 117         def_bool y
 118
 119 source "init/Kconfig"
 120
 121 source "kernel/Kconfig.freezer"
 122
 123 menu "Platform selection"
 124
 125 config ARCH_VEXPRESS
 126         bool "ARMv8 software model (Versatile Express)"
 127         select ARCH_REQUIRE_GPIOLIB
 128         select COMMON_CLK_VERSATILE
 129         select POWER_RESET_VEXPRESS
 130         select VEXPRESS_CONFIG
 131         help
 132           This enables support for the ARMv8 software model (Versatile
 133           Express).
 134
 135 config ARCH_XGENE
 136         bool "AppliedMicro X-Gene SOC Family"
 137         help
 138           This enables support for AppliedMicro X-Gene SOC Family
 139
 140 endmenu
 141
 142 menu "Bus support"
 143
 144 config ARM_AMBA
 145         bool
 146
 147 endmenu
 148
 149 menu "Kernel Features"
 150
 151 config ARM64_64K_PAGES
 152         bool "Enable 64KB pages support"
 153         help
 154           This feature enables 64KB pages support (4KB by default)
 155           allowing only two levels of page tables and faster TLB
 156           look-up. AArch32 emulation is not available when this feature
 157           is enabled.
 158
 159 config CPU_BIG_ENDIAN
 160        bool "Build big-endian kernel"
 161        help
 162          Say Y if you plan on running a kernel in big-endian mode.
 163
 164 config SMP
 165         bool "Symmetric Multi-Processing"
 166         help
 167           This enables support for systems with more than one CPU.  If
 168           you say N here, the kernel will run on single and
 169           multiprocessor machines, but will use only one CPU of a
 170           multiprocessor machine. If you say Y here, the kernel will run
 171           on many, but not all, single processor machines. On a single
 172           processor machine, the kernel will run faster if you say N
 173           here.
 174
 175           If you don't know what to do here, say N.
 176
 177 config SCHED_MC
 178         bool "Multi-core scheduler support"
 179         depends on SMP
 180         help
 181           Multi-core scheduler support improves the CPU scheduler's decision
 182           making when dealing with multi-core CPU chips at a cost of slightly
 183           increased overhead in some places. If unsure say N here.
 184
 185 config SCHED_SMT
 186         bool "SMT scheduler support"
 187         depends on SMP
 188         help
 189           Improves the CPU scheduler's decision making when dealing with
 190           MultiThreading at a cost of slightly increased overhead in some
 191           places. If unsure say N here.
 192
 193 config NR_CPUS
 194         int "Maximum number of CPUs (2-32)"
 195         range 2 32
 196         depends on SMP
 197         # These have to remain sorted largest to smallest
 198         default "8"
 199
 200 config HOTPLUG_CPU
 201         bool "Support for hot-pluggable CPUs"
 202         depends on SMP
 203         help
 204           Say Y here to experiment with turning CPUs off and on.  CPUs
 205           can be controlled through /sys/devices/system/cpu.
 206
 207 source kernel/Kconfig.preempt
 208
 209 config HZ
 210         int
 211         default 100
 212
 213 config ARCH_HAS_HOLES_MEMORYMODEL
 214         def_bool y if SPARSEMEM
 215
 216 config ARCH_SPARSEMEM_ENABLE
 217         def_bool y
 218         select SPARSEMEM_VMEMMAP_ENABLE
 219
 220 config ARCH_SPARSEMEM_DEFAULT
 221         def_bool ARCH_SPARSEMEM_ENABLE
 222
 223 config ARCH_SELECT_MEMORY_MODEL
 224         def_bool ARCH_SPARSEMEM_ENABLE
 225
 226 config HAVE_ARCH_PFN_VALID
 227         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 228
 229 config HW_PERF_EVENTS
 230         bool "Enable hardware performance counter support for perf events"
 231         depends on PERF_EVENTS
 232         default y
 233         help
 234           Enable hardware performance counter support for perf events. If
 235           disabled, perf events will use software events only.
 236
 237 config SYS_SUPPORTS_HUGETLBFS
 238         def_bool y
 239
 240 config ARCH_WANT_GENERAL_HUGETLB
 241         def_bool y
 242
 243 config ARCH_WANT_HUGE_PMD_SHARE
 244         def_bool y if !ARM64_64K_PAGES
 245
 246 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
 247         def_bool y
 248
 249 config ARCH_HAS_CACHE_LINE_SIZE
 250         def_bool y
 251
 252 source "mm/Kconfig"
 253
 254 config XEN_DOM0
 255         def_bool y
 256         depends on XEN
 257
 258 config XEN
 259         bool "Xen guest support on ARM64 (EXPERIMENTAL)"
 260         depends on ARM64 && OF
 261         select SWIOTLB_XEN
 262         help
 263           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
 264
 265 config FORCE_MAX_ZONEORDER
 266         int
 267         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
 268         default "11"
 269
 270 endmenu
 271
 272 menu "Boot options"
 273
 274 config CMDLINE
 275         string "Default kernel command string"
 276         default ""
 277         help
 278           Provide a set of default command-line options at build time by
 279           entering them here. As a minimum, you should specify the the
 280           root device (e.g. root=/dev/nfs).
 281
 282 config CMDLINE_FORCE
 283         bool "Always use the default kernel command string"
 284         help
 285           Always use the default kernel command string, even if the boot
 286           loader passes other arguments to the kernel.
 287           This is useful if you cannot or don't want to change the
 288           command-line options your boot loader passes to the kernel.
 289
 290 endmenu
 291
 292 menu "Userspace binary formats"
 293
 294 source "fs/Kconfig.binfmt"
 295
 296 config COMPAT
 297         bool "Kernel support for 32-bit EL0"
 298         depends on !ARM64_64K_PAGES
 299         select COMPAT_BINFMT_ELF
 300         select HAVE_UID16
 301         select OLD_SIGSUSPEND3
 302         select COMPAT_OLD_SIGACTION
 303         help
 304           This option enables support for a 32-bit EL0 running under a 64-bit
 305           kernel at EL1. AArch32-specific components such as system calls,
 306           the user helper functions, VFP support and the ptrace interface are
 307           handled appropriately by the kernel.
 308
 309           If you want to execute 32-bit userspace applications, say Y.
 310
 311 config SYSVIPC_COMPAT
 312         def_bool y
 313         depends on COMPAT && SYSVIPC
 314
 315 endmenu
 316
 317 menu "Power management options"
 318
 319 source "kernel/power/Kconfig"
 320
 321 config ARCH_SUSPEND_POSSIBLE
 322         def_bool y
 323
 324 config ARM64_CPU_SUSPEND
 325         def_bool PM_SLEEP
 326
 327 endmenu
 328
 329 menu "CPU Power Management"
 330
 331 source "drivers/cpuidle/Kconfig"
 332
 333 source "drivers/cpufreq/Kconfig"
 334
 335 endmenu
 336
 337 source "net/Kconfig"
 338
 339 source "drivers/Kconfig"
 340
 341 source "fs/Kconfig"
 342
 343 source "arch/arm64/kvm/Kconfig"
 344
 345 source "arch/arm64/Kconfig.debug"
 346
 347 source "security/Kconfig"
 348
 349 source "crypto/Kconfig"
 350 if CRYPTO
 351 source "arch/arm64/crypto/Kconfig"
 352 endif
 353
 354 source "lib/Kconfig"