1config ARM64 2 def_bool y 3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 4 select GENERIC_CLOCKEVENTS 5 select GENERIC_HARDIRQS_NO_DEPRECATED 6 select GENERIC_IOMAP 7 select GENERIC_IRQ_PROBE 8 select GENERIC_IRQ_SHOW 9 select GENERIC_SMP_IDLE_THREAD 10 select GENERIC_TIME_VSYSCALL 11 select HARDIRQS_SW_RESEND 12 select HAVE_ARCH_TRACEHOOK 13 select HAVE_DMA_API_DEBUG 14 select HAVE_DMA_ATTRS 15 select HAVE_GENERIC_DMA_COHERENT 16 select HAVE_GENERIC_HARDIRQS 17 select HAVE_HW_BREAKPOINT if PERF_EVENTS 18 select HAVE_IRQ_WORK 19 select HAVE_MEMBLOCK 20 select HAVE_PERF_EVENTS 21 select HAVE_SPARSE_IRQ 22 select IRQ_DOMAIN 23 select NO_BOOTMEM 24 select OF 25 select OF_EARLY_FLATTREE 26 select PERF_USE_VMALLOC 27 select RTC_LIB 28 select SPARSE_IRQ 29 help 30 ARM 64-bit (AArch64) Linux support. 31 32config 64BIT 33 def_bool y 34 35config ARCH_PHYS_ADDR_T_64BIT 36 def_bool y 37 38config MMU 39 def_bool y 40 41config NO_IOPORT 42 def_bool y 43 44config STACKTRACE_SUPPORT 45 def_bool y 46 47config LOCKDEP_SUPPORT 48 def_bool y 49 50config TRACE_IRQFLAGS_SUPPORT 51 def_bool y 52 53config GENERIC_LOCKBREAK 54 def_bool y 55 depends on SMP && PREEMPT 56 57config RWSEM_GENERIC_SPINLOCK 58 def_bool y 59 60config GENERIC_HWEIGHT 61 def_bool y 62 63config GENERIC_CSUM 64 def_bool y 65 66config GENERIC_CALIBRATE_DELAY 67 def_bool y 68 69config ZONE_DMA32 70 def_bool y 71 72config ARCH_DMA_ADDR_T_64BIT 73 def_bool y 74 75config NEED_DMA_MAP_STATE 76 def_bool y 77 78config NEED_SG_DMA_LENGTH 79 def_bool y 80 81config SWIOTLB 82 def_bool y 83 84config IOMMU_HELPER 85 def_bool SWIOTLB 86 87source "init/Kconfig" 88 89source "kernel/Kconfig.freezer" 90 91menu "System Type" 92 93endmenu 94 95menu "Bus support" 96 97config ARM_AMBA 98 bool 99 100endmenu 101 102menu "Kernel Features" 103 104source "kernel/time/Kconfig" 105 106config ARM64_64K_PAGES 107 bool "Enable 64KB pages support" 108 help 109 This feature enables 64KB pages support (4KB by default) 110 allowing only two levels of page tables and faster TLB 111 look-up. AArch32 emulation is not available when this feature 112 is enabled. 113 114config SMP 115 bool "Symmetric Multi-Processing" 116 select USE_GENERIC_SMP_HELPERS 117 help 118 This enables support for systems with more than one CPU. If 119 you say N here, the kernel will run on single and 120 multiprocessor machines, but will use only one CPU of a 121 multiprocessor machine. If you say Y here, the kernel will run 122 on many, but not all, single processor machines. On a single 123 processor machine, the kernel will run faster if you say N 124 here. 125 126 If you don't know what to do here, say N. 127 128config NR_CPUS 129 int "Maximum number of CPUs (2-32)" 130 range 2 32 131 depends on SMP 132 default "4" 133 134source kernel/Kconfig.preempt 135 136config HZ 137 int 138 default 100 139 140config ARCH_HAS_HOLES_MEMORYMODEL 141 def_bool y if SPARSEMEM 142 143config ARCH_SPARSEMEM_ENABLE 144 def_bool y 145 select SPARSEMEM_VMEMMAP_ENABLE 146 147config ARCH_SPARSEMEM_DEFAULT 148 def_bool ARCH_SPARSEMEM_ENABLE 149 150config ARCH_SELECT_MEMORY_MODEL 151 def_bool ARCH_SPARSEMEM_ENABLE 152 153config HAVE_ARCH_PFN_VALID 154 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 155 156config HW_PERF_EVENTS 157 bool "Enable hardware performance counter support for perf events" 158 depends on PERF_EVENTS 159 default y 160 help 161 Enable hardware performance counter support for perf events. If 162 disabled, perf events will use software events only. 163 164source "mm/Kconfig" 165 166endmenu 167 168menu "Boot options" 169 170config CMDLINE 171 string "Default kernel command string" 172 default "" 173 help 174 Provide a set of default command-line options at build time by 175 entering them here. As a minimum, you should specify the the 176 root device (e.g. root=/dev/nfs). 177 178config CMDLINE_FORCE 179 bool "Always use the default kernel command string" 180 help 181 Always use the default kernel command string, even if the boot 182 loader passes other arguments to the kernel. 183 This is useful if you cannot or don't want to change the 184 command-line options your boot loader passes to the kernel. 185 186endmenu 187 188menu "Userspace binary formats" 189 190source "fs/Kconfig.binfmt" 191 192config COMPAT 193 bool "Kernel support for 32-bit EL0" 194 depends on !ARM64_64K_PAGES 195 select COMPAT_BINFMT_ELF 196 help 197 This option enables support for a 32-bit EL0 running under a 64-bit 198 kernel at EL1. AArch32-specific components such as system calls, 199 the user helper functions, VFP support and the ptrace interface are 200 handled appropriately by the kernel. 201 202 If you want to execute 32-bit userspace applications, say Y. 203 204config SYSVIPC_COMPAT 205 def_bool y 206 depends on COMPAT && SYSVIPC 207 208endmenu 209 210source "net/Kconfig" 211 212source "drivers/Kconfig" 213 214source "fs/Kconfig" 215 216source "arch/arm64/Kconfig.debug" 217 218source "security/Kconfig" 219 220source "crypto/Kconfig" 221 222source "lib/Kconfig" 223