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
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
24 select HAVE_GENERIC_DMA_COHERENT
25 select HAVE_GENERIC_HARDIRQS
26 select HAVE_HW_BREAKPOINT if PERF_EVENTS
28 select HAVE_PERF_EVENTS
30 select MODULES_USE_ELF_RELA
33 select OF_EARLY_FLATTREE
34 select PERF_USE_VMALLOC
39 select SYSCTL_EXCEPTION_TRACE
41 ARM 64-bit (AArch64) Linux support.
46 config ARCH_PHYS_ADDR_T_64BIT
55 config STACKTRACE_SUPPORT
58 config LOCKDEP_SUPPORT
61 config TRACE_IRQFLAGS_SUPPORT
64 config GENERIC_LOCKBREAK
66 depends on SMP && PREEMPT
68 config RWSEM_GENERIC_SPINLOCK
71 config GENERIC_HWEIGHT
77 config GENERIC_CALIBRATE_DELAY
83 config ARCH_DMA_ADDR_T_64BIT
86 config NEED_DMA_MAP_STATE
89 config NEED_SG_DMA_LENGTH
100 source "kernel/Kconfig.freezer"
102 menu "Platform selection"
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
111 This enables support for the ARMv8 software model (Versatile
123 menu "Kernel Features"
125 config ARM64_64K_PAGES
126 bool "Enable 64KB pages support"
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
134 bool "Symmetric Multi-Processing"
135 select USE_GENERIC_SMP_HELPERS
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
145 If you don't know what to do here, say N.
147 config ARM_CPU_TOPOLOGY
148 bool "Support CPU topology definition"
152 Support CPU topology definition, based on configuration
153 provided by the firmware.
156 bool "Multi-core scheduler support"
157 depends on ARM_CPU_TOPOLOGY
159 Multi-core scheduler support improves the CPU scheduler's decision
160 making when dealing with multi-core CPU chips at a cost of slightly
161 increased overhead in some places. If unsure say N here.
164 bool "SMT scheduler support"
165 depends on ARM_CPU_TOPOLOGY
167 Improves the CPU scheduler's decision making when dealing with
168 MultiThreading at a cost of slightly increased overhead in some
169 places. If unsure say N here.
172 int "Maximum number of CPUs (2-32)"
178 bool "Support for hot-pluggable CPUs"
181 Say Y here to experiment with turning CPUs off and on. CPUs
182 can be controlled through /sys/devices/system/cpu.
184 source kernel/Kconfig.preempt
190 config ARCH_HAS_HOLES_MEMORYMODEL
191 def_bool y if SPARSEMEM
193 config ARCH_SPARSEMEM_ENABLE
195 select SPARSEMEM_VMEMMAP_ENABLE
197 config ARCH_SPARSEMEM_DEFAULT
198 def_bool ARCH_SPARSEMEM_ENABLE
200 config ARCH_SELECT_MEMORY_MODEL
201 def_bool ARCH_SPARSEMEM_ENABLE
203 config HAVE_ARCH_PFN_VALID
204 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
206 config HW_PERF_EVENTS
207 bool "Enable hardware performance counter support for perf events"
208 depends on PERF_EVENTS
211 Enable hardware performance counter support for perf events. If
212 disabled, perf events will use software events only.
221 string "Default kernel command string"
224 Provide a set of default command-line options at build time by
225 entering them here. As a minimum, you should specify the the
226 root device (e.g. root=/dev/nfs).
229 bool "Always use the default kernel command string"
231 Always use the default kernel command string, even if the boot
232 loader passes other arguments to the kernel.
233 This is useful if you cannot or don't want to change the
234 command-line options your boot loader passes to the kernel.
238 menu "Userspace binary formats"
240 source "fs/Kconfig.binfmt"
243 bool "Kernel support for 32-bit EL0"
244 depends on !ARM64_64K_PAGES
245 select COMPAT_BINFMT_ELF
247 select OLD_SIGSUSPEND3
248 select COMPAT_OLD_SIGACTION
250 This option enables support for a 32-bit EL0 running under a 64-bit
251 kernel at EL1. AArch32-specific components such as system calls,
252 the user helper functions, VFP support and the ptrace interface are
253 handled appropriately by the kernel.
255 If you want to execute 32-bit userspace applications, say Y.
257 config SYSVIPC_COMPAT
259 depends on COMPAT && SYSVIPC
263 menu "Power management options"
265 source "kernel/power/Kconfig"
267 source "drivers/cpufreq/Kconfig"
273 source "drivers/Kconfig"
277 source "arch/arm64/Kconfig.debug"
279 source "security/Kconfig"
281 source "crypto/Kconfig"