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 CLONE_BACKWARDS 10 select COMMON_CLK 11 select GENERIC_CLOCKEVENTS 12 select GENERIC_HARDIRQS_NO_DEPRECATED 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 RTC_LIB 36 select SPARSE_IRQ 37 select SYSCTL_EXCEPTION_TRACE 38 help 39 ARM 64-bit (AArch64) Linux support. 40 41config 64BIT 42 def_bool y 43 44config ARCH_PHYS_ADDR_T_64BIT 45 def_bool y 46 47config MMU 48 def_bool y 49 50config NO_IOPORT 51 def_bool y 52 53config STACKTRACE_SUPPORT 54 def_bool y 55 56config LOCKDEP_SUPPORT 57 def_bool y 58 59config TRACE_IRQFLAGS_SUPPORT 60 def_bool y 61 62config GENERIC_LOCKBREAK 63 def_bool y 64 depends on SMP && PREEMPT 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 GENERIC_GPIO 97 bool 98 99source "init/Kconfig" 100 101source "kernel/Kconfig.freezer" 102 103menu "System Type" 104 105endmenu 106 107menu "Bus support" 108 109config ARM_AMBA 110 bool 111 112endmenu 113 114menu "Kernel Features" 115 116source "kernel/time/Kconfig" 117 118config ARM64_64K_PAGES 119 bool "Enable 64KB pages support" 120 help 121 This feature enables 64KB pages support (4KB by default) 122 allowing only two levels of page tables and faster TLB 123 look-up. AArch32 emulation is not available when this feature 124 is enabled. 125 126config SMP 127 bool "Symmetric Multi-Processing" 128 select USE_GENERIC_SMP_HELPERS 129 help 130 This enables support for systems with more than one CPU. If 131 you say N here, the kernel will run on single and 132 multiprocessor machines, but will use only one CPU of a 133 multiprocessor machine. If you say Y here, the kernel will run 134 on many, but not all, single processor machines. On a single 135 processor machine, the kernel will run faster if you say N 136 here. 137 138 If you don't know what to do here, say N. 139 140config NR_CPUS 141 int "Maximum number of CPUs (2-32)" 142 range 2 32 143 depends on SMP 144 default "4" 145 146source kernel/Kconfig.preempt 147 148config HZ 149 int 150 default 100 151 152config ARCH_HAS_HOLES_MEMORYMODEL 153 def_bool y if SPARSEMEM 154 155config ARCH_SPARSEMEM_ENABLE 156 def_bool y 157 select SPARSEMEM_VMEMMAP_ENABLE 158 159config ARCH_SPARSEMEM_DEFAULT 160 def_bool ARCH_SPARSEMEM_ENABLE 161 162config ARCH_SELECT_MEMORY_MODEL 163 def_bool ARCH_SPARSEMEM_ENABLE 164 165config HAVE_ARCH_PFN_VALID 166 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 167 168config HW_PERF_EVENTS 169 bool "Enable hardware performance counter support for perf events" 170 depends on PERF_EVENTS 171 default y 172 help 173 Enable hardware performance counter support for perf events. If 174 disabled, perf events will use software events only. 175 176source "mm/Kconfig" 177 178endmenu 179 180menu "Boot options" 181 182config CMDLINE 183 string "Default kernel command string" 184 default "" 185 help 186 Provide a set of default command-line options at build time by 187 entering them here. As a minimum, you should specify the the 188 root device (e.g. root=/dev/nfs). 189 190config CMDLINE_FORCE 191 bool "Always use the default kernel command string" 192 help 193 Always use the default kernel command string, even if the boot 194 loader passes other arguments to the kernel. 195 This is useful if you cannot or don't want to change the 196 command-line options your boot loader passes to the kernel. 197 198endmenu 199 200menu "Userspace binary formats" 201 202source "fs/Kconfig.binfmt" 203 204config COMPAT 205 bool "Kernel support for 32-bit EL0" 206 depends on !ARM64_64K_PAGES 207 select COMPAT_BINFMT_ELF 208 select HAVE_UID16 209 select OLD_SIGSUSPEND3 210 select COMPAT_OLD_SIGACTION 211 help 212 This option enables support for a 32-bit EL0 running under a 64-bit 213 kernel at EL1. AArch32-specific components such as system calls, 214 the user helper functions, VFP support and the ptrace interface are 215 handled appropriately by the kernel. 216 217 If you want to execute 32-bit userspace applications, say Y. 218 219config SYSVIPC_COMPAT 220 def_bool y 221 depends on COMPAT && SYSVIPC 222 223endmenu 224 225source "net/Kconfig" 226 227source "drivers/Kconfig" 228 229source "fs/Kconfig" 230 231source "arch/arm64/Kconfig.debug" 232 233source "security/Kconfig" 234 235source "crypto/Kconfig" 236 237source "lib/Kconfig" 238