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