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_GENERIC_HARDIRQS 27 select HAVE_HW_BREAKPOINT if PERF_EVENTS 28 select HAVE_MEMBLOCK 29 select HAVE_PERF_EVENTS 30 select IRQ_DOMAIN 31 select MODULES_USE_ELF_RELA 32 select NO_BOOTMEM 33 select OF 34 select OF_EARLY_FLATTREE 35 select PERF_USE_VMALLOC 36 select POWER_RESET 37 select POWER_SUPPLY 38 select RTC_LIB 39 select SPARSE_IRQ 40 select SYSCTL_EXCEPTION_TRACE 41 help 42 ARM 64-bit (AArch64) Linux support. 43 44config 64BIT 45 def_bool y 46 47config ARCH_PHYS_ADDR_T_64BIT 48 def_bool y 49 50config MMU 51 def_bool y 52 53config NO_IOPORT 54 def_bool y 55 56config STACKTRACE_SUPPORT 57 def_bool y 58 59config LOCKDEP_SUPPORT 60 def_bool y 61 62config TRACE_IRQFLAGS_SUPPORT 63 def_bool y 64 65config GENERIC_LOCKBREAK 66 def_bool y 67 depends on SMP && PREEMPT 68 69config RWSEM_GENERIC_SPINLOCK 70 def_bool y 71 72config GENERIC_HWEIGHT 73 def_bool y 74 75config GENERIC_CSUM 76 def_bool y 77 78config GENERIC_CALIBRATE_DELAY 79 def_bool y 80 81config ZONE_DMA32 82 def_bool y 83 84config ARCH_DMA_ADDR_T_64BIT 85 def_bool y 86 87config NEED_DMA_MAP_STATE 88 def_bool y 89 90config NEED_SG_DMA_LENGTH 91 def_bool y 92 93config SWIOTLB 94 def_bool y 95 96config IOMMU_HELPER 97 def_bool SWIOTLB 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 SMP 140 bool "Symmetric Multi-Processing" 141 select USE_GENERIC_SMP_HELPERS 142 help 143 This enables support for systems with more than one CPU. If 144 you say N here, the kernel will run on single and 145 multiprocessor machines, but will use only one CPU of a 146 multiprocessor machine. If you say Y here, the kernel will run 147 on many, but not all, single processor machines. On a single 148 processor machine, the kernel will run faster if you say N 149 here. 150 151 If you don't know what to do here, say N. 152 153config NR_CPUS 154 int "Maximum number of CPUs (2-32)" 155 range 2 32 156 depends on SMP 157 # These have to remain sorted largest to smallest 158 default "8" if ARCH_XGENE 159 default "4" 160 161source kernel/Kconfig.preempt 162 163config HZ 164 int 165 default 100 166 167config ARCH_HAS_HOLES_MEMORYMODEL 168 def_bool y if SPARSEMEM 169 170config ARCH_SPARSEMEM_ENABLE 171 def_bool y 172 select SPARSEMEM_VMEMMAP_ENABLE 173 174config ARCH_SPARSEMEM_DEFAULT 175 def_bool ARCH_SPARSEMEM_ENABLE 176 177config ARCH_SELECT_MEMORY_MODEL 178 def_bool ARCH_SPARSEMEM_ENABLE 179 180config HAVE_ARCH_PFN_VALID 181 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 182 183config HW_PERF_EVENTS 184 bool "Enable hardware performance counter support for perf events" 185 depends on PERF_EVENTS 186 default y 187 help 188 Enable hardware performance counter support for perf events. If 189 disabled, perf events will use software events only. 190 191config SYS_SUPPORTS_HUGETLBFS 192 def_bool y 193 194config ARCH_WANT_GENERAL_HUGETLB 195 def_bool y 196 197config ARCH_WANT_HUGE_PMD_SHARE 198 def_bool y if !ARM64_64K_PAGES 199 200config HAVE_ARCH_TRANSPARENT_HUGEPAGE 201 def_bool y 202 203source "mm/Kconfig" 204 205config XEN_DOM0 206 def_bool y 207 depends on XEN 208 209config XEN 210 bool "Xen guest support on ARM64 (EXPERIMENTAL)" 211 depends on ARM64 && OF 212 help 213 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. 214 215config FORCE_MAX_ZONEORDER 216 int 217 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) 218 default "11" 219 220endmenu 221 222menu "Boot options" 223 224config CMDLINE 225 string "Default kernel command string" 226 default "" 227 help 228 Provide a set of default command-line options at build time by 229 entering them here. As a minimum, you should specify the the 230 root device (e.g. root=/dev/nfs). 231 232config CMDLINE_FORCE 233 bool "Always use the default kernel command string" 234 help 235 Always use the default kernel command string, even if the boot 236 loader passes other arguments to the kernel. 237 This is useful if you cannot or don't want to change the 238 command-line options your boot loader passes to the kernel. 239 240endmenu 241 242menu "Userspace binary formats" 243 244source "fs/Kconfig.binfmt" 245 246config COMPAT 247 bool "Kernel support for 32-bit EL0" 248 depends on !ARM64_64K_PAGES 249 select COMPAT_BINFMT_ELF 250 select HAVE_UID16 251 select OLD_SIGSUSPEND3 252 select COMPAT_OLD_SIGACTION 253 help 254 This option enables support for a 32-bit EL0 running under a 64-bit 255 kernel at EL1. AArch32-specific components such as system calls, 256 the user helper functions, VFP support and the ptrace interface are 257 handled appropriately by the kernel. 258 259 If you want to execute 32-bit userspace applications, say Y. 260 261config SYSVIPC_COMPAT 262 def_bool y 263 depends on COMPAT && SYSVIPC 264 265endmenu 266 267source "net/Kconfig" 268 269source "drivers/Kconfig" 270 271source "fs/Kconfig" 272 273source "arch/arm64/kvm/Kconfig" 274 275source "arch/arm64/Kconfig.debug" 276 277source "security/Kconfig" 278 279source "crypto/Kconfig" 280 281source "lib/Kconfig" 282