arch/arm64/Kconfig

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