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