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