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