1config ARM64 2 def_bool y 3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 4 select ARCH_USE_CMPXCHG_LOCKREF 5 select ARCH_WANT_OPTIONAL_GPIOLIB 6 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION 7 select ARCH_WANT_FRAME_POINTERS 8 select ARM_AMBA 9 select ARM_ARCH_TIMER 10 select ARM_GIC 11 select BUILDTIME_EXTABLE_SORT 12 select CLONE_BACKWARDS 13 select COMMON_CLK 14 select GENERIC_CLOCKEVENTS 15 select GENERIC_IOMAP 16 select GENERIC_IRQ_PROBE 17 select GENERIC_IRQ_SHOW 18 select GENERIC_SCHED_CLOCK 19 select GENERIC_SMP_IDLE_THREAD 20 select GENERIC_TIME_VSYSCALL 21 select HARDIRQS_SW_RESEND 22 select HAVE_ARCH_TRACEHOOK 23 select HAVE_DEBUG_BUGVERBOSE 24 select HAVE_DEBUG_KMEMLEAK 25 select HAVE_DMA_API_DEBUG 26 select HAVE_DMA_ATTRS 27 select HAVE_GENERIC_DMA_COHERENT 28 select HAVE_HW_BREAKPOINT if PERF_EVENTS 29 select HAVE_MEMBLOCK 30 select HAVE_PERF_EVENTS 31 select IRQ_DOMAIN 32 select MODULES_USE_ELF_RELA 33 select NO_BOOTMEM 34 select OF 35 select OF_EARLY_FLATTREE 36 select PERF_USE_VMALLOC 37 select POWER_RESET 38 select POWER_SUPPLY 39 select RTC_LIB 40 select SPARSE_IRQ 41 select SYSCTL_EXCEPTION_TRACE 42 help 43 ARM 64-bit (AArch64) Linux support. 44 45config 64BIT 46 def_bool y 47 48config ARCH_PHYS_ADDR_T_64BIT 49 def_bool y 50 51config MMU 52 def_bool y 53 54config NO_IOPORT 55 def_bool y 56 57config STACKTRACE_SUPPORT 58 def_bool y 59 60config LOCKDEP_SUPPORT 61 def_bool y 62 63config TRACE_IRQFLAGS_SUPPORT 64 def_bool y 65 66config RWSEM_GENERIC_SPINLOCK 67 def_bool y 68 69config GENERIC_HWEIGHT 70 def_bool y 71 72config GENERIC_CSUM 73 def_bool y 74 75config GENERIC_CALIBRATE_DELAY 76 def_bool y 77 78config ZONE_DMA32 79 def_bool y 80 81config ARCH_DMA_ADDR_T_64BIT 82 def_bool y 83 84config NEED_DMA_MAP_STATE 85 def_bool y 86 87config NEED_SG_DMA_LENGTH 88 def_bool y 89 90config SWIOTLB 91 def_bool y 92 93config IOMMU_HELPER 94 def_bool SWIOTLB 95 96config KERNEL_MODE_NEON 97 def_bool y 98 99source "init/Kconfig" 100 101source "kernel/Kconfig.freezer" 102 103menu "Platform selection" 104 105config ARCH_VEXPRESS 106 bool "ARMv8 software model (Versatile Express)" 107 select ARCH_REQUIRE_GPIOLIB 108 select COMMON_CLK_VERSATILE 109 select POWER_RESET_VEXPRESS 110 select VEXPRESS_CONFIG 111 help 112 This enables support for the ARMv8 software model (Versatile 113 Express). 114 115config ARCH_XGENE 116 bool "AppliedMicro X-Gene SOC Family" 117 help 118 This enables support for AppliedMicro X-Gene SOC Family 119 120endmenu 121 122menu "Bus support" 123 124config ARM_AMBA 125 bool 126 127endmenu 128 129menu "Kernel Features" 130 131config ARM64_64K_PAGES 132 bool "Enable 64KB pages support" 133 help 134 This feature enables 64KB pages support (4KB by default) 135 allowing only two levels of page tables and faster TLB 136 look-up. AArch32 emulation is not available when this feature 137 is enabled. 138 139config CPU_BIG_ENDIAN 140 bool "Build big-endian kernel" 141 help 142 Say Y if you plan on running a kernel in big-endian mode. 143 144config SMP 145 bool "Symmetric Multi-Processing" 146 select USE_GENERIC_SMP_HELPERS 147 help 148 This enables support for systems with more than one CPU. If 149 you say N here, the kernel will run on single and 150 multiprocessor machines, but will use only one CPU of a 151 multiprocessor machine. If you say Y here, the kernel will run 152 on many, but not all, single processor machines. On a single 153 processor machine, the kernel will run faster if you say N 154 here. 155 156 If you don't know what to do here, say N. 157 158config NR_CPUS 159 int "Maximum number of CPUs (2-32)" 160 range 2 32 161 depends on SMP 162 # These have to remain sorted largest to smallest 163 default "8" if ARCH_XGENE 164 default "4" 165 166config HOTPLUG_CPU 167 bool "Support for hot-pluggable CPUs" 168 depends on SMP 169 help 170 Say Y here to experiment with turning CPUs off and on. CPUs 171 can be controlled through /sys/devices/system/cpu. 172 173source kernel/Kconfig.preempt 174 175config HZ 176 int 177 default 100 178 179config ARCH_HAS_HOLES_MEMORYMODEL 180 def_bool y if SPARSEMEM 181 182config ARCH_SPARSEMEM_ENABLE 183 def_bool y 184 select SPARSEMEM_VMEMMAP_ENABLE 185 186config ARCH_SPARSEMEM_DEFAULT 187 def_bool ARCH_SPARSEMEM_ENABLE 188 189config ARCH_SELECT_MEMORY_MODEL 190 def_bool ARCH_SPARSEMEM_ENABLE 191 192config HAVE_ARCH_PFN_VALID 193 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 194 195config HW_PERF_EVENTS 196 bool "Enable hardware performance counter support for perf events" 197 depends on PERF_EVENTS 198 default y 199 help 200 Enable hardware performance counter support for perf events. If 201 disabled, perf events will use software events only. 202 203config SYS_SUPPORTS_HUGETLBFS 204 def_bool y 205 206config ARCH_WANT_GENERAL_HUGETLB 207 def_bool y 208 209config ARCH_WANT_HUGE_PMD_SHARE 210 def_bool y if !ARM64_64K_PAGES 211 212config HAVE_ARCH_TRANSPARENT_HUGEPAGE 213 def_bool y 214 215source "mm/Kconfig" 216 217config XEN_DOM0 218 def_bool y 219 depends on XEN 220 221config XEN 222 bool "Xen guest support on ARM64 (EXPERIMENTAL)" 223 depends on ARM64 && OF 224 help 225 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. 226 227config FORCE_MAX_ZONEORDER 228 int 229 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) 230 default "11" 231 232endmenu 233 234menu "Boot options" 235 236config CMDLINE 237 string "Default kernel command string" 238 default "" 239 help 240 Provide a set of default command-line options at build time by 241 entering them here. As a minimum, you should specify the the 242 root device (e.g. root=/dev/nfs). 243 244config CMDLINE_FORCE 245 bool "Always use the default kernel command string" 246 help 247 Always use the default kernel command string, even if the boot 248 loader passes other arguments to the kernel. 249 This is useful if you cannot or don't want to change the 250 command-line options your boot loader passes to the kernel. 251 252endmenu 253 254menu "Userspace binary formats" 255 256source "fs/Kconfig.binfmt" 257 258config COMPAT 259 bool "Kernel support for 32-bit EL0" 260 depends on !ARM64_64K_PAGES 261 select COMPAT_BINFMT_ELF 262 select HAVE_UID16 263 select OLD_SIGSUSPEND3 264 select COMPAT_OLD_SIGACTION 265 help 266 This option enables support for a 32-bit EL0 running under a 64-bit 267 kernel at EL1. AArch32-specific components such as system calls, 268 the user helper functions, VFP support and the ptrace interface are 269 handled appropriately by the kernel. 270 271 If you want to execute 32-bit userspace applications, say Y. 272 273config SYSVIPC_COMPAT 274 def_bool y 275 depends on COMPAT && SYSVIPC 276 277endmenu 278 279source "net/Kconfig" 280 281source "drivers/Kconfig" 282 283source "fs/Kconfig" 284 285source "arch/arm64/kvm/Kconfig" 286 287source "arch/arm64/Kconfig.debug" 288 289source "security/Kconfig" 290 291source "crypto/Kconfig" 292 293source "lib/Kconfig" 294