1config ARM64 2 def_bool y 3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 4 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 5 select ARCH_USE_CMPXCHG_LOCKREF 6 select ARCH_SUPPORTS_ATOMIC_RMW 7 select ARCH_WANT_OPTIONAL_GPIOLIB 8 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION 9 select ARCH_WANT_FRAME_POINTERS 10 select ARM_AMBA 11 select ARM_ARCH_TIMER 12 select ARM_GIC 13 select AUDIT_ARCH_COMPAT_GENERIC 14 select ARM_GIC_V3 15 select BUILDTIME_EXTABLE_SORT 16 select CLONE_BACKWARDS 17 select COMMON_CLK 18 select CPU_PM if (SUSPEND || CPU_IDLE) 19 select DCACHE_WORD_ACCESS 20 select GENERIC_CLOCKEVENTS 21 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 22 select GENERIC_CPU_AUTOPROBE 23 select GENERIC_EARLY_IOREMAP 24 select GENERIC_IOMAP 25 select GENERIC_IRQ_PROBE 26 select GENERIC_IRQ_SHOW 27 select GENERIC_SCHED_CLOCK 28 select GENERIC_SMP_IDLE_THREAD 29 select GENERIC_STRNCPY_FROM_USER 30 select GENERIC_STRNLEN_USER 31 select GENERIC_TIME_VSYSCALL 32 select HARDIRQS_SW_RESEND 33 select HAVE_ARCH_AUDITSYSCALL 34 select HAVE_ARCH_JUMP_LABEL 35 select HAVE_ARCH_KGDB 36 select HAVE_ARCH_TRACEHOOK 37 select HAVE_C_RECORDMCOUNT 38 select HAVE_CC_STACKPROTECTOR 39 select HAVE_DEBUG_BUGVERBOSE 40 select HAVE_DEBUG_KMEMLEAK 41 select HAVE_DMA_API_DEBUG 42 select HAVE_DMA_ATTRS 43 select HAVE_DMA_CONTIGUOUS 44 select HAVE_DYNAMIC_FTRACE 45 select HAVE_EFFICIENT_UNALIGNED_ACCESS 46 select HAVE_FTRACE_MCOUNT_RECORD 47 select HAVE_FUNCTION_TRACER 48 select HAVE_FUNCTION_GRAPH_TRACER 49 select HAVE_GENERIC_DMA_COHERENT 50 select HAVE_HW_BREAKPOINT if PERF_EVENTS 51 select HAVE_MEMBLOCK 52 select HAVE_PATA_PLATFORM 53 select HAVE_PERF_EVENTS 54 select HAVE_PERF_REGS 55 select HAVE_PERF_USER_STACK_DUMP 56 select HAVE_SYSCALL_TRACEPOINTS 57 select IRQ_DOMAIN 58 select MODULES_USE_ELF_RELA 59 select NO_BOOTMEM 60 select OF 61 select OF_EARLY_FLATTREE 62 select OF_RESERVED_MEM 63 select PERF_USE_VMALLOC 64 select POWER_RESET 65 select POWER_SUPPLY 66 select RTC_LIB 67 select SPARSE_IRQ 68 select SYSCTL_EXCEPTION_TRACE 69 select HAVE_CONTEXT_TRACKING 70 help 71 ARM 64-bit (AArch64) Linux support. 72 73config 64BIT 74 def_bool y 75 76config ARCH_PHYS_ADDR_T_64BIT 77 def_bool y 78 79config MMU 80 def_bool y 81 82config NO_IOPORT_MAP 83 def_bool y 84 85config STACKTRACE_SUPPORT 86 def_bool y 87 88config LOCKDEP_SUPPORT 89 def_bool y 90 91config TRACE_IRQFLAGS_SUPPORT 92 def_bool y 93 94config RWSEM_XCHGADD_ALGORITHM 95 def_bool y 96 97config GENERIC_HWEIGHT 98 def_bool y 99 100config GENERIC_CSUM 101 def_bool y 102 103config GENERIC_CALIBRATE_DELAY 104 def_bool y 105 106config ZONE_DMA 107 def_bool y 108 109config ARCH_DMA_ADDR_T_64BIT 110 def_bool y 111 112config NEED_DMA_MAP_STATE 113 def_bool y 114 115config NEED_SG_DMA_LENGTH 116 def_bool y 117 118config SWIOTLB 119 def_bool y 120 121config IOMMU_HELPER 122 def_bool SWIOTLB 123 124config KERNEL_MODE_NEON 125 def_bool y 126 127config FIX_EARLYCON_MEM 128 def_bool y 129 130source "init/Kconfig" 131 132source "kernel/Kconfig.freezer" 133 134menu "Platform selection" 135 136config ARCH_VEXPRESS 137 bool "ARMv8 software model (Versatile Express)" 138 select ARCH_REQUIRE_GPIOLIB 139 select COMMON_CLK_VERSATILE 140 select POWER_RESET_VEXPRESS 141 select VEXPRESS_CONFIG 142 help 143 This enables support for the ARMv8 software model (Versatile 144 Express). 145 146config ARCH_XGENE 147 bool "AppliedMicro X-Gene SOC Family" 148 help 149 This enables support for AppliedMicro X-Gene SOC Family 150 151endmenu 152 153menu "Bus support" 154 155config ARM_AMBA 156 bool 157 158endmenu 159 160menu "Kernel Features" 161 162choice 163 prompt "Page size" 164 default ARM64_4K_PAGES 165 help 166 Page size (translation granule) configuration. 167 168config ARM64_4K_PAGES 169 bool "4KB" 170 help 171 This feature enables 4KB pages support. 172 173config ARM64_64K_PAGES 174 bool "64KB" 175 help 176 This feature enables 64KB pages support (4KB by default) 177 allowing only two levels of page tables and faster TLB 178 look-up. AArch32 emulation is not available when this feature 179 is enabled. 180 181endchoice 182 183choice 184 prompt "Virtual address space size" 185 default ARM64_VA_BITS_39 if ARM64_4K_PAGES 186 default ARM64_VA_BITS_42 if ARM64_64K_PAGES 187 help 188 Allows choosing one of multiple possible virtual address 189 space sizes. The level of translation table is determined by 190 a combination of page size and virtual address space size. 191 192config ARM64_VA_BITS_39 193 bool "39-bit" 194 depends on ARM64_4K_PAGES 195 196config ARM64_VA_BITS_42 197 bool "42-bit" 198 depends on ARM64_64K_PAGES 199 200config ARM64_VA_BITS_48 201 bool "48-bit" 202 depends on BROKEN 203 204endchoice 205 206config ARM64_VA_BITS 207 int 208 default 39 if ARM64_VA_BITS_39 209 default 42 if ARM64_VA_BITS_42 210 default 48 if ARM64_VA_BITS_48 211 212config ARM64_PGTABLE_LEVELS 213 int 214 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42 215 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48 216 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39 217 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48 218 219config CPU_BIG_ENDIAN 220 bool "Build big-endian kernel" 221 help 222 Say Y if you plan on running a kernel in big-endian mode. 223 224config SMP 225 bool "Symmetric Multi-Processing" 226 help 227 This enables support for systems with more than one CPU. If 228 you say N here, the kernel will run on single and 229 multiprocessor machines, but will use only one CPU of a 230 multiprocessor machine. If you say Y here, the kernel will run 231 on many, but not all, single processor machines. On a single 232 processor machine, the kernel will run faster if you say N 233 here. 234 235 If you don't know what to do here, say N. 236 237config SCHED_MC 238 bool "Multi-core scheduler support" 239 depends on SMP 240 help 241 Multi-core scheduler support improves the CPU scheduler's decision 242 making when dealing with multi-core CPU chips at a cost of slightly 243 increased overhead in some places. If unsure say N here. 244 245config SCHED_SMT 246 bool "SMT scheduler support" 247 depends on SMP 248 help 249 Improves the CPU scheduler's decision making when dealing with 250 MultiThreading at a cost of slightly increased overhead in some 251 places. If unsure say N here. 252 253config NR_CPUS 254 int "Maximum number of CPUs (2-32)" 255 range 2 32 256 depends on SMP 257 # These have to remain sorted largest to smallest 258 default "8" 259 260config HOTPLUG_CPU 261 bool "Support for hot-pluggable CPUs" 262 depends on SMP 263 help 264 Say Y here to experiment with turning CPUs off and on. CPUs 265 can be controlled through /sys/devices/system/cpu. 266 267source kernel/Kconfig.preempt 268 269config HZ 270 int 271 default 100 272 273config ARCH_HAS_HOLES_MEMORYMODEL 274 def_bool y if SPARSEMEM 275 276config ARCH_SPARSEMEM_ENABLE 277 def_bool y 278 select SPARSEMEM_VMEMMAP_ENABLE 279 280config ARCH_SPARSEMEM_DEFAULT 281 def_bool ARCH_SPARSEMEM_ENABLE 282 283config ARCH_SELECT_MEMORY_MODEL 284 def_bool ARCH_SPARSEMEM_ENABLE 285 286config HAVE_ARCH_PFN_VALID 287 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 288 289config HW_PERF_EVENTS 290 bool "Enable hardware performance counter support for perf events" 291 depends on PERF_EVENTS 292 default y 293 help 294 Enable hardware performance counter support for perf events. If 295 disabled, perf events will use software events only. 296 297config SYS_SUPPORTS_HUGETLBFS 298 def_bool y 299 300config ARCH_WANT_GENERAL_HUGETLB 301 def_bool y 302 303config ARCH_WANT_HUGE_PMD_SHARE 304 def_bool y if !ARM64_64K_PAGES 305 306config HAVE_ARCH_TRANSPARENT_HUGEPAGE 307 def_bool y 308 309config ARCH_HAS_CACHE_LINE_SIZE 310 def_bool y 311 312source "mm/Kconfig" 313 314config XEN_DOM0 315 def_bool y 316 depends on XEN 317 318config XEN 319 bool "Xen guest support on ARM64 (EXPERIMENTAL)" 320 depends on ARM64 && OF 321 select SWIOTLB_XEN 322 help 323 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. 324 325config FORCE_MAX_ZONEORDER 326 int 327 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) 328 default "11" 329 330endmenu 331 332menu "Boot options" 333 334config CMDLINE 335 string "Default kernel command string" 336 default "" 337 help 338 Provide a set of default command-line options at build time by 339 entering them here. As a minimum, you should specify the the 340 root device (e.g. root=/dev/nfs). 341 342config CMDLINE_FORCE 343 bool "Always use the default kernel command string" 344 help 345 Always use the default kernel command string, even if the boot 346 loader passes other arguments to the kernel. 347 This is useful if you cannot or don't want to change the 348 command-line options your boot loader passes to the kernel. 349 350config EFI_STUB 351 bool 352 353config EFI 354 bool "UEFI runtime support" 355 depends on OF && !CPU_BIG_ENDIAN 356 select LIBFDT 357 select UCS2_STRING 358 select EFI_PARAMS_FROM_FDT 359 select EFI_RUNTIME_WRAPPERS 360 select EFI_STUB 361 select EFI_ARMSTUB 362 default y 363 help 364 This option provides support for runtime services provided 365 by UEFI firmware (such as non-volatile variables, realtime 366 clock, and platform reset). A UEFI stub is also provided to 367 allow the kernel to be booted as an EFI application. This 368 is only useful on systems that have UEFI firmware. 369 370endmenu 371 372menu "Userspace binary formats" 373 374source "fs/Kconfig.binfmt" 375 376config COMPAT 377 bool "Kernel support for 32-bit EL0" 378 depends on !ARM64_64K_PAGES 379 select COMPAT_BINFMT_ELF 380 select HAVE_UID16 381 select OLD_SIGSUSPEND3 382 select COMPAT_OLD_SIGACTION 383 help 384 This option enables support for a 32-bit EL0 running under a 64-bit 385 kernel at EL1. AArch32-specific components such as system calls, 386 the user helper functions, VFP support and the ptrace interface are 387 handled appropriately by the kernel. 388 389 If you want to execute 32-bit userspace applications, say Y. 390 391config SYSVIPC_COMPAT 392 def_bool y 393 depends on COMPAT && SYSVIPC 394 395endmenu 396 397menu "Power management options" 398 399source "kernel/power/Kconfig" 400 401config ARCH_SUSPEND_POSSIBLE 402 def_bool y 403 404config ARM64_CPU_SUSPEND 405 def_bool PM_SLEEP 406 407endmenu 408 409menu "CPU Power Management" 410 411source "drivers/cpuidle/Kconfig" 412 413source "drivers/cpufreq/Kconfig" 414 415endmenu 416 417source "net/Kconfig" 418 419source "drivers/Kconfig" 420 421source "drivers/firmware/Kconfig" 422 423source "fs/Kconfig" 424 425source "arch/arm64/kvm/Kconfig" 426 427source "arch/arm64/Kconfig.debug" 428 429source "security/Kconfig" 430 431source "crypto/Kconfig" 432if CRYPTO 433source "arch/arm64/crypto/Kconfig" 434endif 435 436source "lib/Kconfig" 437