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