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