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