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_COMPAT_RT_SIGPENDING
  10         select GENERIC_COMPAT_RT_SIGPROCMASK
  11         select GENERIC_COMPAT_RT_SIGQUEUEINFO
  12         select GENERIC_HARDIRQS_NO_DEPRECATED
  13         select GENERIC_IOMAP
  14         select GENERIC_IRQ_PROBE
  15         select GENERIC_IRQ_SHOW
  16         select GENERIC_SIGALTSTACK
  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_IRQ_WORK
  29         select HAVE_MEMBLOCK
  30         select HAVE_PERF_EVENTS
  31         select IRQ_DOMAIN
  32         select MODULES_USE_ELF_RELA
  33         select NO_BOOTMEM
  34         select OF
  35         select OF_EARLY_FLATTREE
  36         select PERF_USE_VMALLOC
  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 config GENERIC_GPIO
  99         def_bool y
 100
 101 source "init/Kconfig"
 102
 103 source "kernel/Kconfig.freezer"
 104
 105 menu "System Type"
 106
 107 endmenu
 108
 109 menu "Bus support"
 110
 111 config ARM_AMBA
 112         bool
 113
 114 endmenu
 115
 116 menu "Kernel Features"
 117
 118 source "kernel/time/Kconfig"
 119
 120 config ARM64_64K_PAGES
 121         bool "Enable 64KB pages support"
 122         help
 123           This feature enables 64KB pages support (4KB by default)
 124           allowing only two levels of page tables and faster TLB
 125           look-up. AArch32 emulation is not available when this feature
 126           is enabled.
 127
 128 config SMP
 129         bool "Symmetric Multi-Processing"
 130         select USE_GENERIC_SMP_HELPERS
 131         help
 132           This enables support for systems with more than one CPU.  If
 133           you say N here, the kernel will run on single and
 134           multiprocessor machines, but will use only one CPU of a
 135           multiprocessor machine. If you say Y here, the kernel will run
 136           on many, but not all, single processor machines. On a single
 137           processor machine, the kernel will run faster if you say N
 138           here.
 139
 140           If you don't know what to do here, say N.
 141
 142 config NR_CPUS
 143         int "Maximum number of CPUs (2-32)"
 144         range 2 32
 145         depends on SMP
 146         default "4"
 147
 148 source kernel/Kconfig.preempt
 149
 150 config HZ
 151         int
 152         default 100
 153
 154 config ARCH_HAS_HOLES_MEMORYMODEL
 155         def_bool y if SPARSEMEM
 156
 157 config ARCH_SPARSEMEM_ENABLE
 158         def_bool y
 159         select SPARSEMEM_VMEMMAP_ENABLE
 160
 161 config ARCH_SPARSEMEM_DEFAULT
 162         def_bool ARCH_SPARSEMEM_ENABLE
 163
 164 config ARCH_SELECT_MEMORY_MODEL
 165         def_bool ARCH_SPARSEMEM_ENABLE
 166
 167 config HAVE_ARCH_PFN_VALID
 168         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 169
 170 config HW_PERF_EVENTS
 171         bool "Enable hardware performance counter support for perf events"
 172         depends on PERF_EVENTS
 173         default y
 174         help
 175           Enable hardware performance counter support for perf events. If
 176           disabled, perf events will use software events only.
 177
 178 source "mm/Kconfig"
 179
 180 endmenu
 181
 182 menu "Boot options"
 183
 184 config CMDLINE
 185         string "Default kernel command string"
 186         default ""
 187         help
 188           Provide a set of default command-line options at build time by
 189           entering them here. As a minimum, you should specify the the
 190           root device (e.g. root=/dev/nfs).
 191
 192 config CMDLINE_FORCE
 193         bool "Always use the default kernel command string"
 194         help
 195           Always use the default kernel command string, even if the boot
 196           loader passes other arguments to the kernel.
 197           This is useful if you cannot or don't want to change the
 198           command-line options your boot loader passes to the kernel.
 199
 200 endmenu
 201
 202 menu "Userspace binary formats"
 203
 204 source "fs/Kconfig.binfmt"
 205
 206 config COMPAT
 207         bool "Kernel support for 32-bit EL0"
 208         depends on !ARM64_64K_PAGES
 209         select COMPAT_BINFMT_ELF
 210         select HAVE_UID16
 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"