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