arch/arm64/Kconfig

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