arch/arm64/Kconfig

   1 config ARM64
   2         def_bool y
   3         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
   4         select ARCH_WANT_OPTIONAL_GPIOLIB
   5         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
   6         select ARCH_WANT_FRAME_POINTERS
   7         select ARM_AMBA
   8         select ARM_ARCH_TIMER
   9         select ARM_GIC
  10         select CLONE_BACKWARDS
  11         select COMMON_CLK
  12         select GENERIC_CLOCKEVENTS
  13         select GENERIC_IOMAP
  14         select GENERIC_IRQ_PROBE
  15         select GENERIC_IRQ_SHOW
  16         select GENERIC_SMP_IDLE_THREAD
  17         select GENERIC_TIME_VSYSCALL
  18         select HARDIRQS_SW_RESEND
  19         select HAVE_ARCH_TRACEHOOK
  20         select HAVE_DEBUG_BUGVERBOSE
  21         select HAVE_DEBUG_KMEMLEAK
  22         select HAVE_DMA_API_DEBUG
  23         select HAVE_DMA_ATTRS
  24         select HAVE_GENERIC_DMA_COHERENT
  25         select HAVE_GENERIC_HARDIRQS
  26         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  27         select HAVE_MEMBLOCK
  28         select HAVE_PERF_EVENTS
  29         select IRQ_DOMAIN
  30         select MODULES_USE_ELF_RELA
  31         select NO_BOOTMEM
  32         select OF
  33         select OF_EARLY_FLATTREE
  34         select PERF_USE_VMALLOC
  35         select POWER_RESET
  36         select POWER_SUPPLY
  37         select RTC_LIB
  38         select SPARSE_IRQ
  39         select SYSCTL_EXCEPTION_TRACE
  40         help
  41           ARM 64-bit (AArch64) Linux support.
  42
  43 config 64BIT
  44         def_bool y
  45
  46 config ARCH_PHYS_ADDR_T_64BIT
  47         def_bool y
  48
  49 config MMU
  50         def_bool y
  51
  52 config NO_IOPORT
  53         def_bool y
  54
  55 config STACKTRACE_SUPPORT
  56         def_bool y
  57
  58 config LOCKDEP_SUPPORT
  59         def_bool y
  60
  61 config TRACE_IRQFLAGS_SUPPORT
  62         def_bool y
  63
  64 config GENERIC_LOCKBREAK
  65         def_bool y
  66         depends on SMP && PREEMPT
  67
  68 config RWSEM_GENERIC_SPINLOCK
  69         def_bool y
  70
  71 config GENERIC_HWEIGHT
  72         def_bool y
  73
  74 config GENERIC_CSUM
  75         def_bool y
  76
  77 config GENERIC_CALIBRATE_DELAY
  78         def_bool y
  79
  80 config ZONE_DMA32
  81         def_bool y
  82
  83 config ARCH_DMA_ADDR_T_64BIT
  84         def_bool y
  85
  86 config NEED_DMA_MAP_STATE
  87         def_bool y
  88
  89 config NEED_SG_DMA_LENGTH
  90         def_bool y
  91
  92 config SWIOTLB
  93         def_bool y
  94
  95 config IOMMU_HELPER
  96         def_bool SWIOTLB
  97
  98 source "init/Kconfig"
  99
 100 source "kernel/Kconfig.freezer"
 101
 102 menu "Platform selection"
 103
 104 config ARCH_VEXPRESS
 105         bool "ARMv8 software model (Versatile Express)"
 106         select ARCH_REQUIRE_GPIOLIB
 107         select COMMON_CLK_VERSATILE
 108         select POWER_RESET_VEXPRESS
 109         select VEXPRESS_CONFIG
 110         help
 111           This enables support for the ARMv8 software model (Versatile
 112           Express).
 113
 114 endmenu
 115
 116 menu "Bus support"
 117
 118 config ARM_AMBA
 119         bool
 120
 121 endmenu
 122
 123 menu "Kernel Features"
 124
 125 source "kernel/time/Kconfig"
 126
 127 config ARM64_64K_PAGES
 128         bool "Enable 64KB pages support"
 129         help
 130           This feature enables 64KB pages support (4KB by default)
 131           allowing only two levels of page tables and faster TLB
 132           look-up. AArch32 emulation is not available when this feature
 133           is enabled.
 134
 135 config SMP
 136         bool "Symmetric Multi-Processing"
 137         select USE_GENERIC_SMP_HELPERS
 138         help
 139           This enables support for systems with more than one CPU.  If
 140           you say N here, the kernel will run on single and
 141           multiprocessor machines, but will use only one CPU of a
 142           multiprocessor machine. If you say Y here, the kernel will run
 143           on many, but not all, single processor machines. On a single
 144           processor machine, the kernel will run faster if you say N
 145           here.
 146
 147           If you don't know what to do here, say N.
 148
 149 config NR_CPUS
 150         int "Maximum number of CPUs (2-32)"
 151         range 2 32
 152         depends on SMP
 153         default "4"
 154
 155 source kernel/Kconfig.preempt
 156
 157 config HZ
 158         int
 159         default 100
 160
 161 config ARCH_HAS_HOLES_MEMORYMODEL
 162         def_bool y if SPARSEMEM
 163
 164 config ARCH_SPARSEMEM_ENABLE
 165         def_bool y
 166         select SPARSEMEM_VMEMMAP_ENABLE
 167
 168 config ARCH_SPARSEMEM_DEFAULT
 169         def_bool ARCH_SPARSEMEM_ENABLE
 170
 171 config ARCH_SELECT_MEMORY_MODEL
 172         def_bool ARCH_SPARSEMEM_ENABLE
 173
 174 config HAVE_ARCH_PFN_VALID
 175         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 176
 177 config HW_PERF_EVENTS
 178         bool "Enable hardware performance counter support for perf events"
 179         depends on PERF_EVENTS
 180         default y
 181         help
 182           Enable hardware performance counter support for perf events. If
 183           disabled, perf events will use software events only.
 184
 185 source "mm/Kconfig"
 186
 187 endmenu
 188
 189 menu "Boot options"
 190
 191 config CMDLINE
 192         string "Default kernel command string"
 193         default ""
 194         help
 195           Provide a set of default command-line options at build time by
 196           entering them here. As a minimum, you should specify the the
 197           root device (e.g. root=/dev/nfs).
 198
 199 config CMDLINE_FORCE
 200         bool "Always use the default kernel command string"
 201         help
 202           Always use the default kernel command string, even if the boot
 203           loader passes other arguments to the kernel.
 204           This is useful if you cannot or don't want to change the
 205           command-line options your boot loader passes to the kernel.
 206
 207 endmenu
 208
 209 menu "Userspace binary formats"
 210
 211 source "fs/Kconfig.binfmt"
 212
 213 config COMPAT
 214         bool "Kernel support for 32-bit EL0"
 215         depends on !ARM64_64K_PAGES
 216         select COMPAT_BINFMT_ELF
 217         select HAVE_UID16
 218         select OLD_SIGSUSPEND3
 219         select COMPAT_OLD_SIGACTION
 220         help
 221           This option enables support for a 32-bit EL0 running under a 64-bit
 222           kernel at EL1. AArch32-specific components such as system calls,
 223           the user helper functions, VFP support and the ptrace interface are
 224           handled appropriately by the kernel.
 225
 226           If you want to execute 32-bit userspace applications, say Y.
 227
 228 config SYSVIPC_COMPAT
 229         def_bool y
 230         depends on COMPAT && SYSVIPC
 231
 232 endmenu
 233
 234 source "net/Kconfig"
 235
 236 source "drivers/Kconfig"
 237
 238 source "fs/Kconfig"
 239
 240 source "arch/arm64/Kconfig.debug"
 241
 242 source "security/Kconfig"
 243
 244 source "crypto/Kconfig"
 245
 246 source "lib/Kconfig"