arch/arm64/Kconfig

   1 config ARM64
   2         def_bool y
   3         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
   4         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
   5         select ARCH_USE_CMPXCHG_LOCKREF
   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 AUDIT_ARCH_COMPAT_GENERIC
  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_AUDITSYSCALL
  32         select HAVE_ARCH_JUMP_LABEL
  33         select HAVE_ARCH_KGDB
  34         select HAVE_ARCH_TRACEHOOK
  35         select HAVE_C_RECORDMCOUNT
  36         select HAVE_CC_STACKPROTECTOR
  37         select HAVE_DEBUG_BUGVERBOSE
  38         select HAVE_DEBUG_KMEMLEAK
  39         select HAVE_DMA_API_DEBUG
  40         select HAVE_DMA_ATTRS
  41         select HAVE_DMA_CONTIGUOUS
  42         select HAVE_DYNAMIC_FTRACE
  43         select HAVE_EFFICIENT_UNALIGNED_ACCESS
  44         select HAVE_FTRACE_MCOUNT_RECORD
  45         select HAVE_FUNCTION_TRACER
  46         select HAVE_FUNCTION_GRAPH_TRACER
  47         select HAVE_GENERIC_DMA_COHERENT
  48         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  49         select HAVE_MEMBLOCK
  50         select HAVE_PATA_PLATFORM
  51         select HAVE_PERF_EVENTS
  52         select HAVE_PERF_REGS
  53         select HAVE_PERF_USER_STACK_DUMP
  54         select HAVE_SYSCALL_TRACEPOINTS
  55         select IRQ_DOMAIN
  56         select MODULES_USE_ELF_RELA
  57         select NO_BOOTMEM
  58         select OF
  59         select OF_EARLY_FLATTREE
  60         select OF_RESERVED_MEM
  61         select PERF_USE_VMALLOC
  62         select POWER_RESET
  63         select POWER_SUPPLY
  64         select RTC_LIB
  65         select SPARSE_IRQ
  66         select SYSCTL_EXCEPTION_TRACE
  67         select HAVE_CONTEXT_TRACKING
  68         help
  69           ARM 64-bit (AArch64) Linux support.
  70
  71 config 64BIT
  72         def_bool y
  73
  74 config ARCH_PHYS_ADDR_T_64BIT
  75         def_bool y
  76
  77 config MMU
  78         def_bool y
  79
  80 config NO_IOPORT_MAP
  81         def_bool y
  82
  83 config STACKTRACE_SUPPORT
  84         def_bool y
  85
  86 config LOCKDEP_SUPPORT
  87         def_bool y
  88
  89 config TRACE_IRQFLAGS_SUPPORT
  90         def_bool y
  91
  92 config RWSEM_XCHGADD_ALGORITHM
  93         def_bool y
  94
  95 config GENERIC_HWEIGHT
  96         def_bool y
  97
  98 config GENERIC_CSUM
  99         def_bool y
 100
 101 config GENERIC_CALIBRATE_DELAY
 102         def_bool y
 103
 104 config ZONE_DMA
 105         def_bool y
 106
 107 config ARCH_DMA_ADDR_T_64BIT
 108         def_bool y
 109
 110 config NEED_DMA_MAP_STATE
 111         def_bool y
 112
 113 config NEED_SG_DMA_LENGTH
 114         def_bool y
 115
 116 config SWIOTLB
 117         def_bool y
 118
 119 config IOMMU_HELPER
 120         def_bool SWIOTLB
 121
 122 config KERNEL_MODE_NEON
 123         def_bool y
 124
 125 config FIX_EARLYCON_MEM
 126         def_bool y
 127
 128 source "init/Kconfig"
 129
 130 source "kernel/Kconfig.freezer"
 131
 132 menu "Platform selection"
 133
 134 config ARCH_VEXPRESS
 135         bool "ARMv8 software model (Versatile Express)"
 136         select ARCH_REQUIRE_GPIOLIB
 137         select COMMON_CLK_VERSATILE
 138         select POWER_RESET_VEXPRESS
 139         select VEXPRESS_CONFIG
 140         help
 141           This enables support for the ARMv8 software model (Versatile
 142           Express).
 143
 144 config ARCH_XGENE
 145         bool "AppliedMicro X-Gene SOC Family"
 146         help
 147           This enables support for AppliedMicro X-Gene SOC Family
 148
 149 endmenu
 150
 151 menu "Bus support"
 152
 153 config ARM_AMBA
 154         bool
 155
 156 endmenu
 157
 158 menu "Kernel Features"
 159
 160 choice
 161         prompt "Page size"
 162         default ARM64_4K_PAGES
 163         help
 164           Page size (translation granule) configuration.
 165
 166 config ARM64_4K_PAGES
 167         bool "4KB"
 168         help
 169           This feature enables 4KB pages support.
 170
 171 config ARM64_64K_PAGES
 172         bool "64KB"
 173         help
 174           This feature enables 64KB pages support (4KB by default)
 175           allowing only two levels of page tables and faster TLB
 176           look-up. AArch32 emulation is not available when this feature
 177           is enabled.
 178
 179 endchoice
 180
 181 choice
 182         prompt "Virtual address space size"
 183         default ARM64_VA_BITS_39 if ARM64_4K_PAGES
 184         default ARM64_VA_BITS_42 if ARM64_64K_PAGES
 185         help
 186           Allows choosing one of multiple possible virtual address
 187           space sizes. The level of translation table is determined by
 188           a combination of page size and virtual address space size.
 189
 190 config ARM64_VA_BITS_39
 191         bool "39-bit"
 192         depends on ARM64_4K_PAGES
 193
 194 config ARM64_VA_BITS_42
 195         bool "42-bit"
 196         depends on ARM64_64K_PAGES
 197
 198 config ARM64_VA_BITS_48
 199         bool "48-bit"
 200         depends on BROKEN
 201
 202 endchoice
 203
 204 config ARM64_VA_BITS
 205         int
 206         default 39 if ARM64_VA_BITS_39
 207         default 42 if ARM64_VA_BITS_42
 208         default 48 if ARM64_VA_BITS_48
 209
 210 config ARM64_PGTABLE_LEVELS
 211         int
 212         default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
 213         default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
 214         default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
 215
 216 config CPU_BIG_ENDIAN
 217        bool "Build big-endian kernel"
 218        help
 219          Say Y if you plan on running a kernel in big-endian mode.
 220
 221 config SMP
 222         bool "Symmetric Multi-Processing"
 223         help
 224           This enables support for systems with more than one CPU.  If
 225           you say N here, the kernel will run on single and
 226           multiprocessor machines, but will use only one CPU of a
 227           multiprocessor machine. If you say Y here, the kernel will run
 228           on many, but not all, single processor machines. On a single
 229           processor machine, the kernel will run faster if you say N
 230           here.
 231
 232           If you don't know what to do here, say N.
 233
 234 config SCHED_MC
 235         bool "Multi-core scheduler support"
 236         depends on SMP
 237         help
 238           Multi-core scheduler support improves the CPU scheduler's decision
 239           making when dealing with multi-core CPU chips at a cost of slightly
 240           increased overhead in some places. If unsure say N here.
 241
 242 config SCHED_SMT
 243         bool "SMT scheduler support"
 244         depends on SMP
 245         help
 246           Improves the CPU scheduler's decision making when dealing with
 247           MultiThreading at a cost of slightly increased overhead in some
 248           places. If unsure say N here.
 249
 250 config NR_CPUS
 251         int "Maximum number of CPUs (2-32)"
 252         range 2 32
 253         depends on SMP
 254         # These have to remain sorted largest to smallest
 255         default "8"
 256
 257 config HOTPLUG_CPU
 258         bool "Support for hot-pluggable CPUs"
 259         depends on SMP
 260         help
 261           Say Y here to experiment with turning CPUs off and on.  CPUs
 262           can be controlled through /sys/devices/system/cpu.
 263
 264 source kernel/Kconfig.preempt
 265
 266 config HZ
 267         int
 268         default 100
 269
 270 config ARCH_HAS_HOLES_MEMORYMODEL
 271         def_bool y if SPARSEMEM
 272
 273 config ARCH_SPARSEMEM_ENABLE
 274         def_bool y
 275         select SPARSEMEM_VMEMMAP_ENABLE
 276
 277 config ARCH_SPARSEMEM_DEFAULT
 278         def_bool ARCH_SPARSEMEM_ENABLE
 279
 280 config ARCH_SELECT_MEMORY_MODEL
 281         def_bool ARCH_SPARSEMEM_ENABLE
 282
 283 config HAVE_ARCH_PFN_VALID
 284         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 285
 286 config HW_PERF_EVENTS
 287         bool "Enable hardware performance counter support for perf events"
 288         depends on PERF_EVENTS
 289         default y
 290         help
 291           Enable hardware performance counter support for perf events. If
 292           disabled, perf events will use software events only.
 293
 294 config SYS_SUPPORTS_HUGETLBFS
 295         def_bool y
 296
 297 config ARCH_WANT_GENERAL_HUGETLB
 298         def_bool y
 299
 300 config ARCH_WANT_HUGE_PMD_SHARE
 301         def_bool y if !ARM64_64K_PAGES
 302
 303 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
 304         def_bool y
 305
 306 config ARCH_HAS_CACHE_LINE_SIZE
 307         def_bool y
 308
 309 source "mm/Kconfig"
 310
 311 config XEN_DOM0
 312         def_bool y
 313         depends on XEN
 314
 315 config XEN
 316         bool "Xen guest support on ARM64 (EXPERIMENTAL)"
 317         depends on ARM64 && OF
 318         select SWIOTLB_XEN
 319         help
 320           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
 321
 322 config FORCE_MAX_ZONEORDER
 323         int
 324         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
 325         default "11"
 326
 327 endmenu
 328
 329 menu "Boot options"
 330
 331 config CMDLINE
 332         string "Default kernel command string"
 333         default ""
 334         help
 335           Provide a set of default command-line options at build time by
 336           entering them here. As a minimum, you should specify the the
 337           root device (e.g. root=/dev/nfs).
 338
 339 config CMDLINE_FORCE
 340         bool "Always use the default kernel command string"
 341         help
 342           Always use the default kernel command string, even if the boot
 343           loader passes other arguments to the kernel.
 344           This is useful if you cannot or don't want to change the
 345           command-line options your boot loader passes to the kernel.
 346
 347 config EFI
 348         bool "UEFI runtime support"
 349         depends on OF && !CPU_BIG_ENDIAN
 350         select LIBFDT
 351         select UCS2_STRING
 352         select EFI_PARAMS_FROM_FDT
 353         default y
 354         help
 355           This option provides support for runtime services provided
 356           by UEFI firmware (such as non-volatile variables, realtime
 357           clock, and platform reset). A UEFI stub is also provided to
 358           allow the kernel to be booted as an EFI application. This
 359           is only useful on systems that have UEFI firmware.
 360
 361 config DMI
 362         bool "Enable support for SMBIOS (DMI) tables"
 363         depends on EFI
 364         default y
 365         help
 366           This enables SMBIOS/DMI feature for systems.
 367
 368           This option is only useful on systems that have UEFI firmware.
 369           However, even with this option, the resultant kernel should
 370           continue to boot on existing non-UEFI platforms.
 371
 372 endmenu
 373
 374 menu "Userspace binary formats"
 375
 376 source "fs/Kconfig.binfmt"
 377
 378 config COMPAT
 379         bool "Kernel support for 32-bit EL0"
 380         depends on !ARM64_64K_PAGES
 381         select COMPAT_BINFMT_ELF
 382         select HAVE_UID16
 383         select OLD_SIGSUSPEND3
 384         select COMPAT_OLD_SIGACTION
 385         help
 386           This option enables support for a 32-bit EL0 running under a 64-bit
 387           kernel at EL1. AArch32-specific components such as system calls,
 388           the user helper functions, VFP support and the ptrace interface are
 389           handled appropriately by the kernel.
 390
 391           If you want to execute 32-bit userspace applications, say Y.
 392
 393 config SYSVIPC_COMPAT
 394         def_bool y
 395         depends on COMPAT && SYSVIPC
 396
 397 endmenu
 398
 399 menu "Power management options"
 400
 401 source "kernel/power/Kconfig"
 402
 403 config ARCH_SUSPEND_POSSIBLE
 404         def_bool y
 405
 406 config ARM64_CPU_SUSPEND
 407         def_bool PM_SLEEP
 408
 409 endmenu
 410
 411 menu "CPU Power Management"
 412
 413 source "drivers/cpuidle/Kconfig"
 414
 415 source "drivers/cpufreq/Kconfig"
 416
 417 endmenu
 418
 419 source "net/Kconfig"
 420
 421 source "drivers/Kconfig"
 422
 423 source "drivers/firmware/Kconfig"
 424
 425 source "fs/Kconfig"
 426
 427 source "arch/arm64/kvm/Kconfig"
 428
 429 source "arch/arm64/Kconfig.debug"
 430
 431 source "security/Kconfig"
 432
 433 source "crypto/Kconfig"
 434 if CRYPTO
 435 source "arch/arm64/crypto/Kconfig"
 436 endif
 437
 438 source "lib/Kconfig"