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