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