1config ARM64 2 def_bool y 3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 4 select ARCH_HAS_SG_CHAIN 5 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 6 select ARCH_USE_CMPXCHG_LOCKREF 7 select ARCH_SUPPORTS_ATOMIC_RMW 8 select ARCH_WANT_OPTIONAL_GPIOLIB 9 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION 10 select ARCH_WANT_FRAME_POINTERS 11 select ARM_AMBA 12 select ARM_ARCH_TIMER 13 select ARM_GIC 14 select AUDIT_ARCH_COMPAT_GENERIC 15 select ARM_GIC_V3 16 select BUILDTIME_EXTABLE_SORT 17 select CLONE_BACKWARDS 18 select COMMON_CLK 19 select CPU_PM if (SUSPEND || CPU_IDLE) 20 select DCACHE_WORD_ACCESS 21 select GENERIC_CLOCKEVENTS 22 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 23 select GENERIC_CPU_AUTOPROBE 24 select GENERIC_EARLY_IOREMAP 25 select GENERIC_IOMAP 26 select GENERIC_IRQ_PROBE 27 select GENERIC_IRQ_SHOW 28 select GENERIC_SCHED_CLOCK 29 select GENERIC_SMP_IDLE_THREAD 30 select GENERIC_STRNCPY_FROM_USER 31 select GENERIC_STRNLEN_USER 32 select GENERIC_TIME_VSYSCALL 33 select HARDIRQS_SW_RESEND 34 select HAVE_ARCH_AUDITSYSCALL 35 select HAVE_ARCH_JUMP_LABEL 36 select HAVE_ARCH_KGDB 37 select HAVE_ARCH_TRACEHOOK 38 select HAVE_C_RECORDMCOUNT 39 select HAVE_CC_STACKPROTECTOR 40 select HAVE_DEBUG_BUGVERBOSE 41 select HAVE_DEBUG_KMEMLEAK 42 select HAVE_DMA_API_DEBUG 43 select HAVE_DMA_ATTRS 44 select HAVE_DMA_CONTIGUOUS 45 select HAVE_DYNAMIC_FTRACE 46 select HAVE_EFFICIENT_UNALIGNED_ACCESS 47 select HAVE_FTRACE_MCOUNT_RECORD 48 select HAVE_FUNCTION_TRACER 49 select HAVE_FUNCTION_GRAPH_TRACER 50 select HAVE_GENERIC_DMA_COHERENT 51 select HAVE_HW_BREAKPOINT if PERF_EVENTS 52 select HAVE_MEMBLOCK 53 select HAVE_PATA_PLATFORM 54 select HAVE_PERF_EVENTS 55 select HAVE_PERF_REGS 56 select HAVE_PERF_USER_STACK_DUMP 57 select HAVE_SYSCALL_TRACEPOINTS 58 select IRQ_DOMAIN 59 select MODULES_USE_ELF_RELA 60 select NO_BOOTMEM 61 select OF 62 select OF_EARLY_FLATTREE 63 select OF_RESERVED_MEM 64 select PERF_USE_VMALLOC 65 select POWER_RESET 66 select POWER_SUPPLY 67 select RTC_LIB 68 select SPARSE_IRQ 69 select SYSCTL_EXCEPTION_TRACE 70 select HAVE_CONTEXT_TRACKING 71 help 72 ARM 64-bit (AArch64) Linux support. 73 74config 64BIT 75 def_bool y 76 77config ARCH_PHYS_ADDR_T_64BIT 78 def_bool y 79 80config MMU 81 def_bool y 82 83config NO_IOPORT_MAP 84 def_bool y 85 86config STACKTRACE_SUPPORT 87 def_bool y 88 89config LOCKDEP_SUPPORT 90 def_bool y 91 92config TRACE_IRQFLAGS_SUPPORT 93 def_bool y 94 95config RWSEM_XCHGADD_ALGORITHM 96 def_bool y 97 98config GENERIC_HWEIGHT 99 def_bool y 100 101config GENERIC_CSUM 102 def_bool y 103 104config GENERIC_CALIBRATE_DELAY 105 def_bool y 106 107config ZONE_DMA 108 def_bool y 109 110config ARCH_DMA_ADDR_T_64BIT 111 def_bool y 112 113config NEED_DMA_MAP_STATE 114 def_bool y 115 116config NEED_SG_DMA_LENGTH 117 def_bool y 118 119config SWIOTLB 120 def_bool y 121 122config IOMMU_HELPER 123 def_bool SWIOTLB 124 125config KERNEL_MODE_NEON 126 def_bool y 127 128config FIX_EARLYCON_MEM 129 def_bool y 130 131source "init/Kconfig" 132 133source "kernel/Kconfig.freezer" 134 135menu "Platform selection" 136 137config ARCH_VEXPRESS 138 bool "ARMv8 software model (Versatile Express)" 139 select ARCH_REQUIRE_GPIOLIB 140 select COMMON_CLK_VERSATILE 141 select POWER_RESET_VEXPRESS 142 select VEXPRESS_CONFIG 143 help 144 This enables support for the ARMv8 software model (Versatile 145 Express). 146 147config ARCH_XGENE 148 bool "AppliedMicro X-Gene SOC Family" 149 help 150 This enables support for AppliedMicro X-Gene SOC Family 151 152endmenu 153 154menu "Bus support" 155 156config ARM_AMBA 157 bool 158 159endmenu 160 161menu "Kernel Features" 162 163choice 164 prompt "Page size" 165 default ARM64_4K_PAGES 166 help 167 Page size (translation granule) configuration. 168 169config ARM64_4K_PAGES 170 bool "4KB" 171 help 172 This feature enables 4KB pages support. 173 174config ARM64_64K_PAGES 175 bool "64KB" 176 help 177 This feature enables 64KB pages support (4KB by default) 178 allowing only two levels of page tables and faster TLB 179 look-up. AArch32 emulation is not available when this feature 180 is enabled. 181 182endchoice 183 184choice 185 prompt "Virtual address space size" 186 default ARM64_VA_BITS_39 if ARM64_4K_PAGES 187 default ARM64_VA_BITS_42 if ARM64_64K_PAGES 188 help 189 Allows choosing one of multiple possible virtual address 190 space sizes. The level of translation table is determined by 191 a combination of page size and virtual address space size. 192 193config ARM64_VA_BITS_39 194 bool "39-bit" 195 depends on ARM64_4K_PAGES 196 197config ARM64_VA_BITS_42 198 bool "42-bit" 199 depends on ARM64_64K_PAGES 200 201config ARM64_VA_BITS_48 202 bool "48-bit" 203 depends on BROKEN 204 205endchoice 206 207config ARM64_VA_BITS 208 int 209 default 39 if ARM64_VA_BITS_39 210 default 42 if ARM64_VA_BITS_42 211 default 48 if ARM64_VA_BITS_48 212 213config ARM64_PGTABLE_LEVELS 214 int 215 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42 216 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48 217 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39 218 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48 219 220config CPU_BIG_ENDIAN 221 bool "Build big-endian kernel" 222 help 223 Say Y if you plan on running a kernel in big-endian mode. 224 225config SMP 226 bool "Symmetric Multi-Processing" 227 help 228 This enables support for systems with more than one CPU. If 229 you say N here, the kernel will run on single and 230 multiprocessor machines, but will use only one CPU of a 231 multiprocessor machine. If you say Y here, the kernel will run 232 on many, but not all, single processor machines. On a single 233 processor machine, the kernel will run faster if you say N 234 here. 235 236 If you don't know what to do here, say N. 237 238config SCHED_MC 239 bool "Multi-core scheduler support" 240 depends on SMP 241 help 242 Multi-core scheduler support improves the CPU scheduler's decision 243 making when dealing with multi-core CPU chips at a cost of slightly 244 increased overhead in some places. If unsure say N here. 245 246config SCHED_SMT 247 bool "SMT scheduler support" 248 depends on SMP 249 help 250 Improves the CPU scheduler's decision making when dealing with 251 MultiThreading at a cost of slightly increased overhead in some 252 places. If unsure say N here. 253 254config NR_CPUS 255 int "Maximum number of CPUs (2-32)" 256 range 2 32 257 depends on SMP 258 # These have to remain sorted largest to smallest 259 default "8" 260 261config HOTPLUG_CPU 262 bool "Support for hot-pluggable CPUs" 263 depends on SMP 264 help 265 Say Y here to experiment with turning CPUs off and on. CPUs 266 can be controlled through /sys/devices/system/cpu. 267 268source kernel/Kconfig.preempt 269 270config HZ 271 int 272 default 100 273 274config ARCH_HAS_HOLES_MEMORYMODEL 275 def_bool y if SPARSEMEM 276 277config ARCH_SPARSEMEM_ENABLE 278 def_bool y 279 select SPARSEMEM_VMEMMAP_ENABLE 280 281config ARCH_SPARSEMEM_DEFAULT 282 def_bool ARCH_SPARSEMEM_ENABLE 283 284config ARCH_SELECT_MEMORY_MODEL 285 def_bool ARCH_SPARSEMEM_ENABLE 286 287config HAVE_ARCH_PFN_VALID 288 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 289 290config HW_PERF_EVENTS 291 bool "Enable hardware performance counter support for perf events" 292 depends on PERF_EVENTS 293 default y 294 help 295 Enable hardware performance counter support for perf events. If 296 disabled, perf events will use software events only. 297 298config SYS_SUPPORTS_HUGETLBFS 299 def_bool y 300 301config ARCH_WANT_GENERAL_HUGETLB 302 def_bool y 303 304config ARCH_WANT_HUGE_PMD_SHARE 305 def_bool y if !ARM64_64K_PAGES 306 307config HAVE_ARCH_TRANSPARENT_HUGEPAGE 308 def_bool y 309 310config ARCH_HAS_CACHE_LINE_SIZE 311 def_bool y 312 313source "mm/Kconfig" 314 315config XEN_DOM0 316 def_bool y 317 depends on XEN 318 319config XEN 320 bool "Xen guest support on ARM64 (EXPERIMENTAL)" 321 depends on ARM64 && OF 322 select SWIOTLB_XEN 323 help 324 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. 325 326config FORCE_MAX_ZONEORDER 327 int 328 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) 329 default "11" 330 331endmenu 332 333menu "Boot options" 334 335config CMDLINE 336 string "Default kernel command string" 337 default "" 338 help 339 Provide a set of default command-line options at build time by 340 entering them here. As a minimum, you should specify the the 341 root device (e.g. root=/dev/nfs). 342 343config CMDLINE_FORCE 344 bool "Always use the default kernel command string" 345 help 346 Always use the default kernel command string, even if the boot 347 loader passes other arguments to the kernel. 348 This is useful if you cannot or don't want to change the 349 command-line options your boot loader passes to the kernel. 350 351config EFI_STUB 352 bool 353 354config EFI 355 bool "UEFI runtime support" 356 depends on OF && !CPU_BIG_ENDIAN 357 select LIBFDT 358 select UCS2_STRING 359 select EFI_PARAMS_FROM_FDT 360 select EFI_RUNTIME_WRAPPERS 361 select EFI_STUB 362 select EFI_ARMSTUB 363 default y 364 help 365 This option provides support for runtime services provided 366 by UEFI firmware (such as non-volatile variables, realtime 367 clock, and platform reset). A UEFI stub is also provided to 368 allow the kernel to be booted as an EFI application. This 369 is only useful on systems that have UEFI firmware. 370 371endmenu 372 373menu "Userspace binary formats" 374 375source "fs/Kconfig.binfmt" 376 377config COMPAT 378 bool "Kernel support for 32-bit EL0" 379 depends on !ARM64_64K_PAGES 380 select COMPAT_BINFMT_ELF 381 select HAVE_UID16 382 select OLD_SIGSUSPEND3 383 select COMPAT_OLD_SIGACTION 384 help 385 This option enables support for a 32-bit EL0 running under a 64-bit 386 kernel at EL1. AArch32-specific components such as system calls, 387 the user helper functions, VFP support and the ptrace interface are 388 handled appropriately by the kernel. 389 390 If you want to execute 32-bit userspace applications, say Y. 391 392config SYSVIPC_COMPAT 393 def_bool y 394 depends on COMPAT && SYSVIPC 395 396endmenu 397 398menu "Power management options" 399 400source "kernel/power/Kconfig" 401 402config ARCH_SUSPEND_POSSIBLE 403 def_bool y 404 405config ARM64_CPU_SUSPEND 406 def_bool PM_SLEEP 407 408endmenu 409 410menu "CPU Power Management" 411 412source "drivers/cpuidle/Kconfig" 413 414source "drivers/cpufreq/Kconfig" 415 416endmenu 417 418source "net/Kconfig" 419 420source "drivers/Kconfig" 421 422source "drivers/firmware/Kconfig" 423 424source "fs/Kconfig" 425 426source "arch/arm64/kvm/Kconfig" 427 428source "arch/arm64/Kconfig.debug" 429 430source "security/Kconfig" 431 432source "crypto/Kconfig" 433if CRYPTO 434source "arch/arm64/crypto/Kconfig" 435endif 436 437source "lib/Kconfig" 438