arch/arm64/Kconfig

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