| 1 | config ARM64 |
| 2 | def_bool y |
| 3 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
| 4 | select ARCH_USE_CMPXCHG_LOCKREF |
| 5 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
| 6 | select ARCH_WANT_OPTIONAL_GPIOLIB |
| 7 | select ARCH_WANT_COMPAT_IPC_PARSE_VERSION |
| 8 | select ARCH_WANT_FRAME_POINTERS |
| 9 | select ARM_AMBA |
| 10 | select ARM_ARCH_TIMER |
| 11 | select ARM_GIC |
| 12 | select BUILDTIME_EXTABLE_SORT |
| 13 | select CLONE_BACKWARDS |
| 14 | select COMMON_CLK |
| 15 | select CPU_PM if (SUSPEND || CPU_IDLE) |
| 16 | select DCACHE_WORD_ACCESS |
| 17 | select GENERIC_CLOCKEVENTS |
| 18 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
| 19 | select GENERIC_CPU_AUTOPROBE |
| 20 | select GENERIC_EARLY_IOREMAP |
| 21 | select GENERIC_IOMAP |
| 22 | select GENERIC_IRQ_PROBE |
| 23 | select GENERIC_IRQ_SHOW |
| 24 | select GENERIC_SCHED_CLOCK |
| 25 | select GENERIC_SMP_IDLE_THREAD |
| 26 | select GENERIC_STRNCPY_FROM_USER |
| 27 | select GENERIC_STRNLEN_USER |
| 28 | select GENERIC_TIME_VSYSCALL |
| 29 | select HARDIRQS_SW_RESEND |
| 30 | select HAVE_ARCH_JUMP_LABEL |
| 31 | select HAVE_ARCH_KGDB |
| 32 | select HAVE_ARCH_TRACEHOOK |
| 33 | select HAVE_C_RECORDMCOUNT |
| 34 | select HAVE_DEBUG_BUGVERBOSE |
| 35 | select HAVE_DEBUG_KMEMLEAK |
| 36 | select HAVE_DMA_API_DEBUG |
| 37 | select HAVE_DMA_ATTRS |
| 38 | select HAVE_DMA_CONTIGUOUS |
| 39 | select HAVE_DYNAMIC_FTRACE |
| 40 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
| 41 | select HAVE_FTRACE_MCOUNT_RECORD |
| 42 | select HAVE_FUNCTION_TRACER |
| 43 | select HAVE_FUNCTION_GRAPH_TRACER |
| 44 | select HAVE_GENERIC_DMA_COHERENT |
| 45 | select HAVE_HW_BREAKPOINT if PERF_EVENTS |
| 46 | select HAVE_MEMBLOCK |
| 47 | select HAVE_PATA_PLATFORM |
| 48 | select HAVE_PERF_EVENTS |
| 49 | select HAVE_PERF_REGS |
| 50 | select HAVE_PERF_USER_STACK_DUMP |
| 51 | select HAVE_SYSCALL_TRACEPOINTS |
| 52 | select IRQ_DOMAIN |
| 53 | select MODULES_USE_ELF_RELA |
| 54 | select NO_BOOTMEM |
| 55 | select OF |
| 56 | select OF_EARLY_FLATTREE |
| 57 | select OF_RESERVED_MEM |
| 58 | select PERF_USE_VMALLOC |
| 59 | select POWER_RESET |
| 60 | select POWER_SUPPLY |
| 61 | select RTC_LIB |
| 62 | select SPARSE_IRQ |
| 63 | select SYSCTL_EXCEPTION_TRACE |
| 64 | help |
| 65 | ARM 64-bit (AArch64) Linux support. |
| 66 | |
| 67 | config 64BIT |
| 68 | def_bool y |
| 69 | |
| 70 | config ARCH_PHYS_ADDR_T_64BIT |
| 71 | def_bool y |
| 72 | |
| 73 | config MMU |
| 74 | def_bool y |
| 75 | |
| 76 | config NO_IOPORT_MAP |
| 77 | def_bool y |
| 78 | |
| 79 | config STACKTRACE_SUPPORT |
| 80 | def_bool y |
| 81 | |
| 82 | config LOCKDEP_SUPPORT |
| 83 | def_bool y |
| 84 | |
| 85 | config TRACE_IRQFLAGS_SUPPORT |
| 86 | def_bool y |
| 87 | |
| 88 | config RWSEM_XCHGADD_ALGORITHM |
| 89 | def_bool y |
| 90 | |
| 91 | config GENERIC_HWEIGHT |
| 92 | def_bool y |
| 93 | |
| 94 | config GENERIC_CSUM |
| 95 | def_bool y |
| 96 | |
| 97 | config GENERIC_CALIBRATE_DELAY |
| 98 | def_bool y |
| 99 | |
| 100 | config ZONE_DMA |
| 101 | def_bool y |
| 102 | |
| 103 | config ARCH_DMA_ADDR_T_64BIT |
| 104 | def_bool y |
| 105 | |
| 106 | config NEED_DMA_MAP_STATE |
| 107 | def_bool y |
| 108 | |
| 109 | config NEED_SG_DMA_LENGTH |
| 110 | def_bool y |
| 111 | |
| 112 | config SWIOTLB |
| 113 | def_bool y |
| 114 | |
| 115 | config IOMMU_HELPER |
| 116 | def_bool SWIOTLB |
| 117 | |
| 118 | config KERNEL_MODE_NEON |
| 119 | def_bool y |
| 120 | |
| 121 | config FIX_EARLYCON_MEM |
| 122 | def_bool y |
| 123 | |
| 124 | source "init/Kconfig" |
| 125 | |
| 126 | source "kernel/Kconfig.freezer" |
| 127 | |
| 128 | menu "Platform selection" |
| 129 | |
| 130 | config ARCH_VEXPRESS |
| 131 | bool "ARMv8 software model (Versatile Express)" |
| 132 | select ARCH_REQUIRE_GPIOLIB |
| 133 | select COMMON_CLK_VERSATILE |
| 134 | select POWER_RESET_VEXPRESS |
| 135 | select VEXPRESS_CONFIG |
| 136 | help |
| 137 | This enables support for the ARMv8 software model (Versatile |
| 138 | Express). |
| 139 | |
| 140 | config ARCH_XGENE |
| 141 | bool "AppliedMicro X-Gene SOC Family" |
| 142 | help |
| 143 | This enables support for AppliedMicro X-Gene SOC Family |
| 144 | |
| 145 | endmenu |
| 146 | |
| 147 | menu "Bus support" |
| 148 | |
| 149 | config ARM_AMBA |
| 150 | bool |
| 151 | |
| 152 | endmenu |
| 153 | |
| 154 | menu "Kernel Features" |
| 155 | |
| 156 | config ARM64_64K_PAGES |
| 157 | bool "Enable 64KB pages support" |
| 158 | help |
| 159 | This feature enables 64KB pages support (4KB by default) |
| 160 | allowing only two levels of page tables and faster TLB |
| 161 | look-up. AArch32 emulation is not available when this feature |
| 162 | is enabled. |
| 163 | |
| 164 | config CPU_BIG_ENDIAN |
| 165 | bool "Build big-endian kernel" |
| 166 | help |
| 167 | Say Y if you plan on running a kernel in big-endian mode. |
| 168 | |
| 169 | config SMP |
| 170 | bool "Symmetric Multi-Processing" |
| 171 | help |
| 172 | This enables support for systems with more than one CPU. If |
| 173 | you say N here, the kernel will run on single and |
| 174 | multiprocessor machines, but will use only one CPU of a |
| 175 | multiprocessor machine. If you say Y here, the kernel will run |
| 176 | on many, but not all, single processor machines. On a single |
| 177 | processor machine, the kernel will run faster if you say N |
| 178 | here. |
| 179 | |
| 180 | If you don't know what to do here, say N. |
| 181 | |
| 182 | config SCHED_MC |
| 183 | bool "Multi-core scheduler support" |
| 184 | depends on SMP |
| 185 | help |
| 186 | Multi-core scheduler support improves the CPU scheduler's decision |
| 187 | making when dealing with multi-core CPU chips at a cost of slightly |
| 188 | increased overhead in some places. If unsure say N here. |
| 189 | |
| 190 | config SCHED_SMT |
| 191 | bool "SMT scheduler support" |
| 192 | depends on SMP |
| 193 | help |
| 194 | Improves the CPU scheduler's decision making when dealing with |
| 195 | MultiThreading at a cost of slightly increased overhead in some |
| 196 | places. If unsure say N here. |
| 197 | |
| 198 | config NR_CPUS |
| 199 | int "Maximum number of CPUs (2-32)" |
| 200 | range 2 32 |
| 201 | depends on SMP |
| 202 | # These have to remain sorted largest to smallest |
| 203 | default "8" |
| 204 | |
| 205 | config HOTPLUG_CPU |
| 206 | bool "Support for hot-pluggable CPUs" |
| 207 | depends on SMP |
| 208 | help |
| 209 | Say Y here to experiment with turning CPUs off and on. CPUs |
| 210 | can be controlled through /sys/devices/system/cpu. |
| 211 | |
| 212 | source kernel/Kconfig.preempt |
| 213 | |
| 214 | config HZ |
| 215 | int |
| 216 | default 100 |
| 217 | |
| 218 | config ARCH_HAS_HOLES_MEMORYMODEL |
| 219 | def_bool y if SPARSEMEM |
| 220 | |
| 221 | config ARCH_SPARSEMEM_ENABLE |
| 222 | def_bool y |
| 223 | select SPARSEMEM_VMEMMAP_ENABLE |
| 224 | |
| 225 | config ARCH_SPARSEMEM_DEFAULT |
| 226 | def_bool ARCH_SPARSEMEM_ENABLE |
| 227 | |
| 228 | config ARCH_SELECT_MEMORY_MODEL |
| 229 | def_bool ARCH_SPARSEMEM_ENABLE |
| 230 | |
| 231 | config HAVE_ARCH_PFN_VALID |
| 232 | def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM |
| 233 | |
| 234 | config HW_PERF_EVENTS |
| 235 | bool "Enable hardware performance counter support for perf events" |
| 236 | depends on PERF_EVENTS |
| 237 | default y |
| 238 | help |
| 239 | Enable hardware performance counter support for perf events. If |
| 240 | disabled, perf events will use software events only. |
| 241 | |
| 242 | config SYS_SUPPORTS_HUGETLBFS |
| 243 | def_bool y |
| 244 | |
| 245 | config ARCH_WANT_GENERAL_HUGETLB |
| 246 | def_bool y |
| 247 | |
| 248 | config ARCH_WANT_HUGE_PMD_SHARE |
| 249 | def_bool y if !ARM64_64K_PAGES |
| 250 | |
| 251 | config HAVE_ARCH_TRANSPARENT_HUGEPAGE |
| 252 | def_bool y |
| 253 | |
| 254 | config ARCH_HAS_CACHE_LINE_SIZE |
| 255 | def_bool y |
| 256 | |
| 257 | source "mm/Kconfig" |
| 258 | |
| 259 | config XEN_DOM0 |
| 260 | def_bool y |
| 261 | depends on XEN |
| 262 | |
| 263 | config XEN |
| 264 | bool "Xen guest support on ARM64 (EXPERIMENTAL)" |
| 265 | depends on ARM64 && OF |
| 266 | select SWIOTLB_XEN |
| 267 | help |
| 268 | Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. |
| 269 | |
| 270 | config FORCE_MAX_ZONEORDER |
| 271 | int |
| 272 | default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) |
| 273 | default "11" |
| 274 | |
| 275 | endmenu |
| 276 | |
| 277 | menu "Boot options" |
| 278 | |
| 279 | config CMDLINE |
| 280 | string "Default kernel command string" |
| 281 | default "" |
| 282 | help |
| 283 | Provide a set of default command-line options at build time by |
| 284 | entering them here. As a minimum, you should specify the the |
| 285 | root device (e.g. root=/dev/nfs). |
| 286 | |
| 287 | config CMDLINE_FORCE |
| 288 | bool "Always use the default kernel command string" |
| 289 | help |
| 290 | Always use the default kernel command string, even if the boot |
| 291 | loader passes other arguments to the kernel. |
| 292 | This is useful if you cannot or don't want to change the |
| 293 | command-line options your boot loader passes to the kernel. |
| 294 | |
| 295 | config EFI |
| 296 | bool "UEFI runtime support" |
| 297 | depends on OF && !CPU_BIG_ENDIAN |
| 298 | select LIBFDT |
| 299 | select UCS2_STRING |
| 300 | select EFI_PARAMS_FROM_FDT |
| 301 | default y |
| 302 | help |
| 303 | This option provides support for runtime services provided |
| 304 | by UEFI firmware (such as non-volatile variables, realtime |
| 305 | clock, and platform reset). A UEFI stub is also provided to |
| 306 | allow the kernel to be booted as an EFI application. This |
| 307 | is only useful on systems that have UEFI firmware. |
| 308 | |
| 309 | endmenu |
| 310 | |
| 311 | menu "Userspace binary formats" |
| 312 | |
| 313 | source "fs/Kconfig.binfmt" |
| 314 | |
| 315 | config COMPAT |
| 316 | bool "Kernel support for 32-bit EL0" |
| 317 | depends on !ARM64_64K_PAGES |
| 318 | select COMPAT_BINFMT_ELF |
| 319 | select HAVE_UID16 |
| 320 | select OLD_SIGSUSPEND3 |
| 321 | select COMPAT_OLD_SIGACTION |
| 322 | help |
| 323 | This option enables support for a 32-bit EL0 running under a 64-bit |
| 324 | kernel at EL1. AArch32-specific components such as system calls, |
| 325 | the user helper functions, VFP support and the ptrace interface are |
| 326 | handled appropriately by the kernel. |
| 327 | |
| 328 | If you want to execute 32-bit userspace applications, say Y. |
| 329 | |
| 330 | config SYSVIPC_COMPAT |
| 331 | def_bool y |
| 332 | depends on COMPAT && SYSVIPC |
| 333 | |
| 334 | endmenu |
| 335 | |
| 336 | menu "Power management options" |
| 337 | |
| 338 | source "kernel/power/Kconfig" |
| 339 | |
| 340 | config ARCH_SUSPEND_POSSIBLE |
| 341 | def_bool y |
| 342 | |
| 343 | config ARM64_CPU_SUSPEND |
| 344 | def_bool PM_SLEEP |
| 345 | |
| 346 | endmenu |
| 347 | |
| 348 | menu "CPU Power Management" |
| 349 | |
| 350 | source "drivers/cpuidle/Kconfig" |
| 351 | |
| 352 | source "drivers/cpufreq/Kconfig" |
| 353 | |
| 354 | endmenu |
| 355 | |
| 356 | source "net/Kconfig" |
| 357 | |
| 358 | source "drivers/Kconfig" |
| 359 | |
| 360 | source "drivers/firmware/Kconfig" |
| 361 | |
| 362 | source "fs/Kconfig" |
| 363 | |
| 364 | source "arch/arm64/kvm/Kconfig" |
| 365 | |
| 366 | source "arch/arm64/Kconfig.debug" |
| 367 | |
| 368 | source "security/Kconfig" |
| 369 | |
| 370 | source "crypto/Kconfig" |
| 371 | if CRYPTO |
| 372 | source "arch/arm64/crypto/Kconfig" |
| 373 | endif |
| 374 | |
| 375 | source "lib/Kconfig" |