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