arch/arm64/Kconfig

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