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