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
10 select CLONE_BACKWARDS
12 select GENERIC_CLOCKEVENTS
13 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
14 select GENERIC_CPU_AUTOPROBE
16 select GENERIC_IRQ_PROBE
17 select GENERIC_IRQ_SHOW
18 select GENERIC_SMP_IDLE_THREAD
19 select GENERIC_TIME_VSYSCALL
20 select HARDIRQS_SW_RESEND
21 select HAVE_ARCH_TRACEHOOK
22 select HAVE_DEBUG_BUGVERBOSE
23 select HAVE_DEBUG_KMEMLEAK
24 select HAVE_DMA_API_DEBUG
26 select HAVE_GENERIC_DMA_COHERENT
27 select HAVE_GENERIC_HARDIRQS
28 select HAVE_HW_BREAKPOINT if PERF_EVENTS
30 select HAVE_PERF_EVENTS
32 select MODULES_USE_ELF_RELA
35 select OF_EARLY_FLATTREE
36 select PERF_USE_VMALLOC
41 select SYSCTL_EXCEPTION_TRACE
43 ARM 64-bit (AArch64) Linux support.
48 config ARCH_PHYS_ADDR_T_64BIT
57 config STACKTRACE_SUPPORT
60 config LOCKDEP_SUPPORT
63 config TRACE_IRQFLAGS_SUPPORT
66 config GENERIC_LOCKBREAK
68 depends on SMP && PREEMPT
70 config RWSEM_GENERIC_SPINLOCK
73 config GENERIC_HWEIGHT
79 config GENERIC_CALIBRATE_DELAY
85 config ARCH_DMA_ADDR_T_64BIT
88 config NEED_DMA_MAP_STATE
91 config NEED_SG_DMA_LENGTH
100 source "init/Kconfig"
102 source "kernel/Kconfig.freezer"
104 menu "Platform selection"
107 bool "ARMv8 software model (Versatile Express)"
108 select ARCH_REQUIRE_GPIOLIB
109 select COMMON_CLK_VERSATILE
110 select POWER_RESET_VEXPRESS
111 select VEXPRESS_CONFIG
113 This enables support for the ARMv8 software model (Versatile
125 menu "Kernel Features"
127 config ARM64_64K_PAGES
128 bool "Enable 64KB pages support"
130 This feature enables 64KB pages support (4KB by default)
131 allowing only two levels of page tables and faster TLB
132 look-up. AArch32 emulation is not available when this feature
136 bool "Symmetric Multi-Processing"
137 select USE_GENERIC_SMP_HELPERS
139 This enables support for systems with more than one CPU. If
140 you say N here, the kernel will run on single and
141 multiprocessor machines, but will use only one CPU of a
142 multiprocessor machine. If you say Y here, the kernel will run
143 on many, but not all, single processor machines. On a single
144 processor machine, the kernel will run faster if you say N
147 If you don't know what to do here, say N.
150 int "Maximum number of CPUs (2-32)"
155 source kernel/Kconfig.preempt
161 config ARCH_HAS_HOLES_MEMORYMODEL
162 def_bool y if SPARSEMEM
164 config ARCH_SPARSEMEM_ENABLE
166 select SPARSEMEM_VMEMMAP_ENABLE
168 config ARCH_SPARSEMEM_DEFAULT
169 def_bool ARCH_SPARSEMEM_ENABLE
171 config ARCH_SELECT_MEMORY_MODEL
172 def_bool ARCH_SPARSEMEM_ENABLE
174 config HAVE_ARCH_PFN_VALID
175 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
177 config HW_PERF_EVENTS
178 bool "Enable hardware performance counter support for perf events"
179 depends on PERF_EVENTS
182 Enable hardware performance counter support for perf events. If
183 disabled, perf events will use software events only.
192 string "Default kernel command string"
195 Provide a set of default command-line options at build time by
196 entering them here. As a minimum, you should specify the the
197 root device (e.g. root=/dev/nfs).
200 prompt "Kernel command line type" if CMDLINE != ""
201 default CMDLINE_FROM_BOOTLOADER
203 config CMDLINE_FROM_BOOTLOADER
204 bool "Use bootloader kernel arguments if available"
206 Uses the command-line options passed by the boot loader. If
207 the boot loader doesn't provide any, the default kernel command
208 string provided in CMDLINE will be used.
210 config CMDLINE_EXTEND
211 bool "Extend bootloader kernel arguments"
213 The command-line arguments provided by the boot loader will be
214 appended to the default kernel command string.
217 bool "Always use the default kernel command string"
219 Always use the default kernel command string, even if the boot
220 loader passes other arguments to the kernel.
221 This is useful if you cannot or don't want to change the
222 command-line options your boot loader passes to the kernel.
225 config BUILD_ARM64_APPENDED_DTB_IMAGE
226 bool "Build a concatenated Image.gz/dtb by default"
229 Enabling this option will cause a concatenated Image.gz and list of
230 DTBs to be built by default (instead of a standalone Image.gz.)
231 The image will built in arch/arm64/boot/Image.gz-dtb
233 config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES
234 string "Default dtb names"
235 depends on BUILD_ARM64_APPENDED_DTB_IMAGE
237 Space separated list of names of dtbs to append when
238 building a concatenated Image.gz-dtb.
242 menu "Userspace binary formats"
244 source "fs/Kconfig.binfmt"
247 bool "Kernel support for 32-bit EL0"
248 depends on !ARM64_64K_PAGES
249 select COMPAT_BINFMT_ELF
251 select OLD_SIGSUSPEND3
252 select COMPAT_OLD_SIGACTION
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.
259 If you want to execute 32-bit userspace applications, say Y.
261 config SYSVIPC_COMPAT
263 depends on COMPAT && SYSVIPC
269 source "drivers/Kconfig"
273 source "arch/arm64/Kconfig.debug"
275 source "security/Kconfig"
277 source "crypto/Kconfig"
279 source "arch/arm64/crypto/Kconfig"