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 COMMON_CLK
   6         select GENERIC_CLOCKEVENTS
   7         select GENERIC_HARDIRQS_NO_DEPRECATED
   8         select GENERIC_IOMAP
   9         select GENERIC_IRQ_PROBE
  10         select GENERIC_IRQ_SHOW
  11         select GENERIC_SMP_IDLE_THREAD
  12         select GENERIC_TIME_VSYSCALL
  13         select HARDIRQS_SW_RESEND
  14         select HAVE_ARCH_TRACEHOOK
  15         select HAVE_DEBUG_BUGVERBOSE
  16         select HAVE_DEBUG_KMEMLEAK
  17         select HAVE_DMA_API_DEBUG
  18         select HAVE_DMA_ATTRS
  19         select HAVE_GENERIC_DMA_COHERENT
  20         select HAVE_GENERIC_HARDIRQS
  21         select HAVE_HW_BREAKPOINT if PERF_EVENTS
  22         select HAVE_IRQ_WORK
  23         select HAVE_MEMBLOCK
  24         select HAVE_PERF_EVENTS
  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         select CLONE_BACKWARDS
  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 source "init/Kconfig"
  94
  95 source "kernel/Kconfig.freezer"
  96
  97 menu "System Type"
  98
  99 endmenu
 100
 101 menu "Bus support"
 102
 103 config ARM_AMBA
 104         bool
 105
 106 endmenu
 107
 108 menu "Kernel Features"
 109
 110 source "kernel/time/Kconfig"
 111
 112 config ARM64_64K_PAGES
 113         bool "Enable 64KB pages support"
 114         help
 115           This feature enables 64KB pages support (4KB by default)
 116           allowing only two levels of page tables and faster TLB
 117           look-up. AArch32 emulation is not available when this feature
 118           is enabled.
 119
 120 config SMP
 121         bool "Symmetric Multi-Processing"
 122         select USE_GENERIC_SMP_HELPERS
 123         help
 124           This enables support for systems with more than one CPU.  If
 125           you say N here, the kernel will run on single and
 126           multiprocessor machines, but will use only one CPU of a
 127           multiprocessor machine. If you say Y here, the kernel will run
 128           on many, but not all, single processor machines. On a single
 129           processor machine, the kernel will run faster if you say N
 130           here.
 131
 132           If you don't know what to do here, say N.
 133
 134 config NR_CPUS
 135         int "Maximum number of CPUs (2-32)"
 136         range 2 32
 137         depends on SMP
 138         default "4"
 139
 140 source kernel/Kconfig.preempt
 141
 142 config HZ
 143         int
 144         default 100
 145
 146 config ARCH_HAS_HOLES_MEMORYMODEL
 147         def_bool y if SPARSEMEM
 148
 149 config ARCH_SPARSEMEM_ENABLE
 150         def_bool y
 151         select SPARSEMEM_VMEMMAP_ENABLE
 152
 153 config ARCH_SPARSEMEM_DEFAULT
 154         def_bool ARCH_SPARSEMEM_ENABLE
 155
 156 config ARCH_SELECT_MEMORY_MODEL
 157         def_bool ARCH_SPARSEMEM_ENABLE
 158
 159 config HAVE_ARCH_PFN_VALID
 160         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 161
 162 config HW_PERF_EVENTS
 163         bool "Enable hardware performance counter support for perf events"
 164         depends on PERF_EVENTS
 165         default y
 166         help
 167           Enable hardware performance counter support for perf events. If
 168           disabled, perf events will use software events only.
 169
 170 source "mm/Kconfig"
 171
 172 endmenu
 173
 174 menu "Boot options"
 175
 176 config CMDLINE
 177         string "Default kernel command string"
 178         default ""
 179         help
 180           Provide a set of default command-line options at build time by
 181           entering them here. As a minimum, you should specify the the
 182           root device (e.g. root=/dev/nfs).
 183
 184 config CMDLINE_FORCE
 185         bool "Always use the default kernel command string"
 186         help
 187           Always use the default kernel command string, even if the boot
 188           loader passes other arguments to the kernel.
 189           This is useful if you cannot or don't want to change the
 190           command-line options your boot loader passes to the kernel.
 191
 192 endmenu
 193
 194 menu "Userspace binary formats"
 195
 196 source "fs/Kconfig.binfmt"
 197
 198 config COMPAT
 199         bool "Kernel support for 32-bit EL0"
 200         depends on !ARM64_64K_PAGES
 201         select COMPAT_BINFMT_ELF
 202         select HAVE_UID16
 203         help
 204           This option enables support for a 32-bit EL0 running under a 64-bit
 205           kernel at EL1. AArch32-specific components such as system calls,
 206           the user helper functions, VFP support and the ptrace interface are
 207           handled appropriately by the kernel.
 208
 209           If you want to execute 32-bit userspace applications, say Y.
 210
 211 config SYSVIPC_COMPAT
 212         def_bool y
 213         depends on COMPAT && SYSVIPC
 214
 215 endmenu
 216
 217 source "net/Kconfig"
 218
 219 source "drivers/Kconfig"
 220
 221 source "fs/Kconfig"
 222
 223 source "arch/arm64/Kconfig.debug"
 224
 225 source "security/Kconfig"
 226
 227 source "crypto/Kconfig"
 228
 229 source "lib/Kconfig"