1config ARM64 2 def_bool y 3 select ARCH_BINFMT_ELF_RANDOMIZE_PIE 4 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 5 select ARCH_HAS_SG_CHAIN 6 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 7 select ARCH_USE_CMPXCHG_LOCKREF 8 select ARCH_SUPPORTS_ATOMIC_RMW 9 select ARCH_WANT_OPTIONAL_GPIOLIB 10 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION 11 select ARCH_WANT_FRAME_POINTERS 12 select ARM_AMBA 13 select ARM_ARCH_TIMER 14 select ARM_GIC 15 select AUDIT_ARCH_COMPAT_GENERIC 16 select ARM_GIC_V3 17 select BUILDTIME_EXTABLE_SORT 18 select CLONE_BACKWARDS 19 select COMMON_CLK 20 select CPU_PM if (SUSPEND || CPU_IDLE) 21 select DCACHE_WORD_ACCESS 22 select GENERIC_ALLOCATOR 23 select GENERIC_CLOCKEVENTS 24 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 25 select GENERIC_CPU_AUTOPROBE 26 select GENERIC_EARLY_IOREMAP 27 select GENERIC_IOMAP 28 select GENERIC_IRQ_PROBE 29 select GENERIC_IRQ_SHOW 30 select GENERIC_SCHED_CLOCK 31 select GENERIC_SMP_IDLE_THREAD 32 select GENERIC_STRNCPY_FROM_USER 33 select GENERIC_STRNLEN_USER 34 select GENERIC_TIME_VSYSCALL 35 select HANDLE_DOMAIN_IRQ 36 select HARDIRQS_SW_RESEND 37 select HAVE_ARCH_AUDITSYSCALL 38 select HAVE_ARCH_JUMP_LABEL 39 select HAVE_ARCH_KGDB 40 select HAVE_ARCH_TRACEHOOK 41 select HAVE_BPF_JIT 42 select HAVE_C_RECORDMCOUNT 43 select HAVE_CC_STACKPROTECTOR 44 select HAVE_DEBUG_BUGVERBOSE 45 select HAVE_DEBUG_KMEMLEAK 46 select HAVE_DMA_API_DEBUG 47 select HAVE_DMA_ATTRS 48 select HAVE_DMA_CONTIGUOUS 49 select HAVE_DYNAMIC_FTRACE 50 select HAVE_EFFICIENT_UNALIGNED_ACCESS 51 select HAVE_FTRACE_MCOUNT_RECORD 52 select HAVE_FUNCTION_TRACER 53 select HAVE_FUNCTION_GRAPH_TRACER 54 select HAVE_GENERIC_DMA_COHERENT 55 select HAVE_HW_BREAKPOINT if PERF_EVENTS 56 select HAVE_MEMBLOCK 57 select HAVE_PATA_PLATFORM 58 select HAVE_PERF_EVENTS 59 select HAVE_PERF_REGS 60 select HAVE_PERF_USER_STACK_DUMP 61 select HAVE_RCU_TABLE_FREE 62 select HAVE_SYSCALL_TRACEPOINTS 63 select IRQ_DOMAIN 64 select MODULES_USE_ELF_RELA 65 select NO_BOOTMEM 66 select OF 67 select OF_EARLY_FLATTREE 68 select OF_RESERVED_MEM 69 select PERF_USE_VMALLOC 70 select POWER_RESET 71 select POWER_SUPPLY 72 select RTC_LIB 73 select SPARSE_IRQ 74 select SYSCTL_EXCEPTION_TRACE 75 select HAVE_CONTEXT_TRACKING 76 help 77 ARM 64-bit (AArch64) Linux support. 78 79config 64BIT 80 def_bool y 81 82config ARCH_PHYS_ADDR_T_64BIT 83 def_bool y 84 85config MMU 86 def_bool y 87 88config NO_IOPORT_MAP 89 def_bool y if !PCI 90 91config STACKTRACE_SUPPORT 92 def_bool y 93 94config LOCKDEP_SUPPORT 95 def_bool y 96 97config TRACE_IRQFLAGS_SUPPORT 98 def_bool y 99 100config RWSEM_XCHGADD_ALGORITHM 101 def_bool y 102 103config GENERIC_HWEIGHT 104 def_bool y 105 106config GENERIC_CSUM 107 def_bool y 108 109config GENERIC_CALIBRATE_DELAY 110 def_bool y 111 112config ZONE_DMA 113 def_bool y 114 115config HAVE_GENERIC_RCU_GUP 116 def_bool y 117 118config ARCH_DMA_ADDR_T_64BIT 119 def_bool y 120 121config NEED_DMA_MAP_STATE 122 def_bool y 123 124config NEED_SG_DMA_LENGTH 125 def_bool y 126 127config SWIOTLB 128 def_bool y 129 130config IOMMU_HELPER 131 def_bool SWIOTLB 132 133config KERNEL_MODE_NEON 134 def_bool y 135 136config FIX_EARLYCON_MEM 137 def_bool y 138 139source "init/Kconfig" 140 141source "kernel/Kconfig.freezer" 142 143menu "Platform selection" 144 145config ARCH_THUNDER 146 bool "Cavium Inc. Thunder SoC Family" 147 help 148 This enables support for Cavium's Thunder Family of SoCs. 149 150config ARCH_VEXPRESS 151 bool "ARMv8 software model (Versatile Express)" 152 select ARCH_REQUIRE_GPIOLIB 153 select COMMON_CLK_VERSATILE 154 select POWER_RESET_VEXPRESS 155 select VEXPRESS_CONFIG 156 help 157 This enables support for the ARMv8 software model (Versatile 158 Express). 159 160config ARCH_XGENE 161 bool "AppliedMicro X-Gene SOC Family" 162 help 163 This enables support for AppliedMicro X-Gene SOC Family 164 165endmenu 166 167menu "Bus support" 168 169config ARM_AMBA 170 bool 171 172config PCI 173 bool "PCI support" 174 help 175 This feature enables support for PCI bus system. If you say Y 176 here, the kernel will include drivers and infrastructure code 177 to support PCI bus devices. 178 179config PCI_DOMAINS 180 def_bool PCI 181 182config PCI_DOMAINS_GENERIC 183 def_bool PCI 184 185config PCI_SYSCALL 186 def_bool PCI 187 188source "drivers/pci/Kconfig" 189source "drivers/pci/pcie/Kconfig" 190source "drivers/pci/hotplug/Kconfig" 191 192endmenu 193 194menu "Kernel Features" 195 196choice 197 prompt "Page size" 198 default ARM64_4K_PAGES 199 help 200 Page size (translation granule) configuration. 201 202config ARM64_4K_PAGES 203 bool "4KB" 204 help 205 This feature enables 4KB pages support. 206 207config ARM64_64K_PAGES 208 bool "64KB" 209 help 210 This feature enables 64KB pages support (4KB by default) 211 allowing only two levels of page tables and faster TLB 212 look-up. AArch32 emulation is not available when this feature 213 is enabled. 214 215endchoice 216 217choice 218 prompt "Virtual address space size" 219 default ARM64_VA_BITS_39 if ARM64_4K_PAGES 220 default ARM64_VA_BITS_42 if ARM64_64K_PAGES 221 help 222 Allows choosing one of multiple possible virtual address 223 space sizes. The level of translation table is determined by 224 a combination of page size and virtual address space size. 225 226config ARM64_VA_BITS_39 227 bool "39-bit" 228 depends on ARM64_4K_PAGES 229 230config ARM64_VA_BITS_42 231 bool "42-bit" 232 depends on ARM64_64K_PAGES 233 234config ARM64_VA_BITS_48 235 bool "48-bit" 236 depends on !ARM_SMMU 237 238endchoice 239 240config ARM64_VA_BITS 241 int 242 default 39 if ARM64_VA_BITS_39 243 default 42 if ARM64_VA_BITS_42 244 default 48 if ARM64_VA_BITS_48 245 246config ARM64_PGTABLE_LEVELS 247 int 248 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42 249 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48 250 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39 251 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48 252 253config CPU_BIG_ENDIAN 254 bool "Build big-endian kernel" 255 help 256 Say Y if you plan on running a kernel in big-endian mode. 257 258config SMP 259 bool "Symmetric Multi-Processing" 260 help 261 This enables support for systems with more than one CPU. If 262 you say N here, the kernel will run on single and 263 multiprocessor machines, but will use only one CPU of a 264 multiprocessor machine. If you say Y here, the kernel will run 265 on many, but not all, single processor machines. On a single 266 processor machine, the kernel will run faster if you say N 267 here. 268 269 If you don't know what to do here, say N. 270 271config SCHED_MC 272 bool "Multi-core scheduler support" 273 depends on SMP 274 help 275 Multi-core scheduler support improves the CPU scheduler's decision 276 making when dealing with multi-core CPU chips at a cost of slightly 277 increased overhead in some places. If unsure say N here. 278 279config SCHED_SMT 280 bool "SMT scheduler support" 281 depends on SMP 282 help 283 Improves the CPU scheduler's decision making when dealing with 284 MultiThreading at a cost of slightly increased overhead in some 285 places. If unsure say N here. 286 287config NR_CPUS 288 int "Maximum number of CPUs (2-64)" 289 range 2 64 290 depends on SMP 291 # These have to remain sorted largest to smallest 292 default "64" 293 294config HOTPLUG_CPU 295 bool "Support for hot-pluggable CPUs" 296 depends on SMP 297 help 298 Say Y here to experiment with turning CPUs off and on. CPUs 299 can be controlled through /sys/devices/system/cpu. 300 301source kernel/Kconfig.preempt 302 303config HZ 304 int 305 default 100 306 307config ARCH_HAS_HOLES_MEMORYMODEL 308 def_bool y if SPARSEMEM 309 310config ARCH_SPARSEMEM_ENABLE 311 def_bool y 312 select SPARSEMEM_VMEMMAP_ENABLE 313 314config ARCH_SPARSEMEM_DEFAULT 315 def_bool ARCH_SPARSEMEM_ENABLE 316 317config ARCH_SELECT_MEMORY_MODEL 318 def_bool ARCH_SPARSEMEM_ENABLE 319 320config HAVE_ARCH_PFN_VALID 321 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 322 323config HW_PERF_EVENTS 324 bool "Enable hardware performance counter support for perf events" 325 depends on PERF_EVENTS 326 default y 327 help 328 Enable hardware performance counter support for perf events. If 329 disabled, perf events will use software events only. 330 331config SYS_SUPPORTS_HUGETLBFS 332 def_bool y 333 334config ARCH_WANT_GENERAL_HUGETLB 335 def_bool y 336 337config ARCH_WANT_HUGE_PMD_SHARE 338 def_bool y if !ARM64_64K_PAGES 339 340config HAVE_ARCH_TRANSPARENT_HUGEPAGE 341 def_bool y 342 343config ARCH_HAS_CACHE_LINE_SIZE 344 def_bool y 345 346source "mm/Kconfig" 347 348config XEN_DOM0 349 def_bool y 350 depends on XEN 351 352config XEN 353 bool "Xen guest support on ARM64" 354 depends on ARM64 && OF 355 select SWIOTLB_XEN 356 help 357 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. 358 359config FORCE_MAX_ZONEORDER 360 int 361 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) 362 default "11" 363 364endmenu 365 366menu "Boot options" 367 368config CMDLINE 369 string "Default kernel command string" 370 default "" 371 help 372 Provide a set of default command-line options at build time by 373 entering them here. As a minimum, you should specify the the 374 root device (e.g. root=/dev/nfs). 375 376config CMDLINE_FORCE 377 bool "Always use the default kernel command string" 378 help 379 Always use the default kernel command string, even if the boot 380 loader passes other arguments to the kernel. 381 This is useful if you cannot or don't want to change the 382 command-line options your boot loader passes to the kernel. 383 384config EFI_STUB 385 bool 386 387config EFI 388 bool "UEFI runtime support" 389 depends on OF && !CPU_BIG_ENDIAN 390 select LIBFDT 391 select UCS2_STRING 392 select EFI_PARAMS_FROM_FDT 393 select EFI_RUNTIME_WRAPPERS 394 select EFI_STUB 395 select EFI_ARMSTUB 396 default y 397 help 398 This option provides support for runtime services provided 399 by UEFI firmware (such as non-volatile variables, realtime 400 clock, and platform reset). A UEFI stub is also provided to 401 allow the kernel to be booted as an EFI application. This 402 is only useful on systems that have UEFI firmware. 403 404endmenu 405 406menu "Userspace binary formats" 407 408source "fs/Kconfig.binfmt" 409 410config COMPAT 411 bool "Kernel support for 32-bit EL0" 412 depends on !ARM64_64K_PAGES 413 select COMPAT_BINFMT_ELF 414 select HAVE_UID16 415 select OLD_SIGSUSPEND3 416 select COMPAT_OLD_SIGACTION 417 help 418 This option enables support for a 32-bit EL0 running under a 64-bit 419 kernel at EL1. AArch32-specific components such as system calls, 420 the user helper functions, VFP support and the ptrace interface are 421 handled appropriately by the kernel. 422 423 If you want to execute 32-bit userspace applications, say Y. 424 425config SYSVIPC_COMPAT 426 def_bool y 427 depends on COMPAT && SYSVIPC 428 429endmenu 430 431menu "Power management options" 432 433source "kernel/power/Kconfig" 434 435config ARCH_SUSPEND_POSSIBLE 436 def_bool y 437 438config ARM64_CPU_SUSPEND 439 def_bool PM_SLEEP 440 441endmenu 442 443menu "CPU Power Management" 444 445source "drivers/cpuidle/Kconfig" 446 447source "drivers/cpufreq/Kconfig" 448 449endmenu 450 451source "net/Kconfig" 452 453source "drivers/Kconfig" 454 455source "drivers/firmware/Kconfig" 456 457source "fs/Kconfig" 458 459source "arch/arm64/kvm/Kconfig" 460 461source "arch/arm64/Kconfig.debug" 462 463source "security/Kconfig" 464 465source "crypto/Kconfig" 466if CRYPTO 467source "arch/arm64/crypto/Kconfig" 468endif 469 470source "lib/Kconfig" 471