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 CLONE_BACKWARDS 11 select COMMON_CLK 12 select GENERIC_CLOCKEVENTS 13 select GENERIC_IOMAP 14 select GENERIC_IRQ_PROBE 15 select GENERIC_IRQ_SHOW 16 select GENERIC_SMP_IDLE_THREAD 17 select GENERIC_TIME_VSYSCALL 18 select HARDIRQS_SW_RESEND 19 select HAVE_ARCH_TRACEHOOK 20 select HAVE_DEBUG_BUGVERBOSE 21 select HAVE_DEBUG_KMEMLEAK 22 select HAVE_DMA_API_DEBUG 23 select HAVE_DMA_ATTRS 24 select HAVE_GENERIC_DMA_COHERENT 25 select HAVE_GENERIC_HARDIRQS 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 98source "init/Kconfig" 99 100source "kernel/Kconfig.freezer" 101 102menu "Platform selection" 103 104config ARCH_VEXPRESS 105 bool "ARMv8 software model (Versatile Express)" 106 select ARCH_REQUIRE_GPIOLIB 107 select COMMON_CLK_VERSATILE 108 select POWER_RESET_VEXPRESS 109 select VEXPRESS_CONFIG 110 help 111 This enables support for the ARMv8 software model (Versatile 112 Express). 113 114endmenu 115 116menu "Bus support" 117 118config ARM_AMBA 119 bool 120 121endmenu 122 123menu "Kernel Features" 124 125config ARM64_64K_PAGES 126 bool "Enable 64KB pages support" 127 help 128 This feature enables 64KB pages support (4KB by default) 129 allowing only two levels of page tables and faster TLB 130 look-up. AArch32 emulation is not available when this feature 131 is enabled. 132 133config SMP 134 bool "Symmetric Multi-Processing" 135 select USE_GENERIC_SMP_HELPERS 136 help 137 This enables support for systems with more than one CPU. If 138 you say N here, the kernel will run on single and 139 multiprocessor machines, but will use only one CPU of a 140 multiprocessor machine. If you say Y here, the kernel will run 141 on many, but not all, single processor machines. On a single 142 processor machine, the kernel will run faster if you say N 143 here. 144 145 If you don't know what to do here, say N. 146 147config NR_CPUS 148 int "Maximum number of CPUs (2-32)" 149 range 2 32 150 depends on SMP 151 default "4" 152 153source kernel/Kconfig.preempt 154 155config HZ 156 int 157 default 100 158 159config ARCH_HAS_HOLES_MEMORYMODEL 160 def_bool y if SPARSEMEM 161 162config ARCH_SPARSEMEM_ENABLE 163 def_bool y 164 select SPARSEMEM_VMEMMAP_ENABLE 165 166config ARCH_SPARSEMEM_DEFAULT 167 def_bool ARCH_SPARSEMEM_ENABLE 168 169config ARCH_SELECT_MEMORY_MODEL 170 def_bool ARCH_SPARSEMEM_ENABLE 171 172config HAVE_ARCH_PFN_VALID 173 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 174 175config HW_PERF_EVENTS 176 bool "Enable hardware performance counter support for perf events" 177 depends on PERF_EVENTS 178 default y 179 help 180 Enable hardware performance counter support for perf events. If 181 disabled, perf events will use software events only. 182 183source "mm/Kconfig" 184 185endmenu 186 187menu "Boot options" 188 189config CMDLINE 190 string "Default kernel command string" 191 default "" 192 help 193 Provide a set of default command-line options at build time by 194 entering them here. As a minimum, you should specify the the 195 root device (e.g. root=/dev/nfs). 196 197config CMDLINE_FORCE 198 bool "Always use the default kernel command string" 199 help 200 Always use the default kernel command string, even if the boot 201 loader passes other arguments to the kernel. 202 This is useful if you cannot or don't want to change the 203 command-line options your boot loader passes to the kernel. 204 205endmenu 206 207menu "Userspace binary formats" 208 209source "fs/Kconfig.binfmt" 210 211config COMPAT 212 bool "Kernel support for 32-bit EL0" 213 depends on !ARM64_64K_PAGES 214 select COMPAT_BINFMT_ELF 215 select HAVE_UID16 216 select OLD_SIGSUSPEND3 217 select COMPAT_OLD_SIGACTION 218 help 219 This option enables support for a 32-bit EL0 running under a 64-bit 220 kernel at EL1. AArch32-specific components such as system calls, 221 the user helper functions, VFP support and the ptrace interface are 222 handled appropriately by the kernel. 223 224 If you want to execute 32-bit userspace applications, say Y. 225 226config SYSVIPC_COMPAT 227 def_bool y 228 depends on COMPAT && SYSVIPC 229 230endmenu 231 232source "net/Kconfig" 233 234source "drivers/Kconfig" 235 236source "fs/Kconfig" 237 238source "arch/arm64/Kconfig.debug" 239 240source "security/Kconfig" 241 242source "crypto/Kconfig" 243 244source "lib/Kconfig" 245