3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
4 select ARCH_USE_CMPXCHG_LOCKREF
5 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
6 select ARCH_WANT_OPTIONAL_GPIOLIB
7 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
8 select ARCH_WANT_FRAME_POINTERS
12 select BUILDTIME_EXTABLE_SORT
13 select CLONE_BACKWARDS
15 select CPU_PM if (SUSPEND || CPU_IDLE)
16 select DCACHE_WORD_ACCESS
17 select GENERIC_CLOCKEVENTS
18 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
19 select GENERIC_CPU_AUTOPROBE
21 select GENERIC_IRQ_PROBE
22 select GENERIC_IRQ_SHOW
23 select GENERIC_SCHED_CLOCK
24 select GENERIC_SMP_IDLE_THREAD
25 select GENERIC_STRNCPY_FROM_USER
26 select GENERIC_STRNLEN_USER
27 select GENERIC_TIME_VSYSCALL
28 select HARDIRQS_SW_RESEND
29 select HAVE_ARCH_JUMP_LABEL
31 select HAVE_ARCH_TRACEHOOK
32 select HAVE_DEBUG_BUGVERBOSE
33 select HAVE_DEBUG_KMEMLEAK
34 select HAVE_DMA_API_DEBUG
36 select HAVE_DMA_CONTIGUOUS
37 select HAVE_EFFICIENT_UNALIGNED_ACCESS
38 select HAVE_GENERIC_DMA_COHERENT
39 select HAVE_HW_BREAKPOINT if PERF_EVENTS
41 select HAVE_PATA_PLATFORM
42 select HAVE_PERF_EVENTS
44 select HAVE_PERF_USER_STACK_DUMP
46 select MODULES_USE_ELF_RELA
49 select OF_EARLY_FLATTREE
50 select PERF_USE_VMALLOC
55 select SYSCTL_EXCEPTION_TRACE
57 ARM 64-bit (AArch64) Linux support.
62 config ARCH_PHYS_ADDR_T_64BIT
71 config STACKTRACE_SUPPORT
74 config LOCKDEP_SUPPORT
77 config TRACE_IRQFLAGS_SUPPORT
80 config RWSEM_XCHGADD_ALGORITHM
83 config GENERIC_HWEIGHT
89 config GENERIC_CALIBRATE_DELAY
95 config ARCH_DMA_ADDR_T_64BIT
98 config NEED_DMA_MAP_STATE
101 config NEED_SG_DMA_LENGTH
110 config KERNEL_MODE_NEON
113 source "init/Kconfig"
115 source "kernel/Kconfig.freezer"
117 menu "Platform selection"
120 bool "ARMv8 software model (Versatile Express)"
121 select ARCH_REQUIRE_GPIOLIB
122 select COMMON_CLK_VERSATILE
123 select POWER_RESET_VEXPRESS
124 select VEXPRESS_CONFIG
126 This enables support for the ARMv8 software model (Versatile
130 bool "AppliedMicro X-Gene SOC Family"
132 This enables support for AppliedMicro X-Gene SOC Family
143 menu "Kernel Features"
145 config ARM64_64K_PAGES
146 bool "Enable 64KB pages support"
148 This feature enables 64KB pages support (4KB by default)
149 allowing only two levels of page tables and faster TLB
150 look-up. AArch32 emulation is not available when this feature
153 config CPU_BIG_ENDIAN
154 bool "Build big-endian kernel"
156 Say Y if you plan on running a kernel in big-endian mode.
159 bool "Symmetric Multi-Processing"
161 This enables support for systems with more than one CPU. If
162 you say N here, the kernel will run on single and
163 multiprocessor machines, but will use only one CPU of a
164 multiprocessor machine. If you say Y here, the kernel will run
165 on many, but not all, single processor machines. On a single
166 processor machine, the kernel will run faster if you say N
169 If you don't know what to do here, say N.
172 bool "Multi-core scheduler support"
175 Multi-core scheduler support improves the CPU scheduler's decision
176 making when dealing with multi-core CPU chips at a cost of slightly
177 increased overhead in some places. If unsure say N here.
180 bool "SMT scheduler support"
183 Improves the CPU scheduler's decision making when dealing with
184 MultiThreading at a cost of slightly increased overhead in some
185 places. If unsure say N here.
188 int "Maximum number of CPUs (2-32)"
191 # These have to remain sorted largest to smallest
195 bool "Support for hot-pluggable CPUs"
198 Say Y here to experiment with turning CPUs off and on. CPUs
199 can be controlled through /sys/devices/system/cpu.
201 source kernel/Kconfig.preempt
207 config ARCH_HAS_HOLES_MEMORYMODEL
208 def_bool y if SPARSEMEM
210 config ARCH_SPARSEMEM_ENABLE
212 select SPARSEMEM_VMEMMAP_ENABLE
214 config ARCH_SPARSEMEM_DEFAULT
215 def_bool ARCH_SPARSEMEM_ENABLE
217 config ARCH_SELECT_MEMORY_MODEL
218 def_bool ARCH_SPARSEMEM_ENABLE
220 config HAVE_ARCH_PFN_VALID
221 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
223 config HW_PERF_EVENTS
224 bool "Enable hardware performance counter support for perf events"
225 depends on PERF_EVENTS
228 Enable hardware performance counter support for perf events. If
229 disabled, perf events will use software events only.
231 config SYS_SUPPORTS_HUGETLBFS
234 config ARCH_WANT_GENERAL_HUGETLB
237 config ARCH_WANT_HUGE_PMD_SHARE
238 def_bool y if !ARM64_64K_PAGES
240 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
250 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
251 depends on ARM64 && OF
254 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
256 config FORCE_MAX_ZONEORDER
258 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
266 string "Default kernel command string"
269 Provide a set of default command-line options at build time by
270 entering them here. As a minimum, you should specify the the
271 root device (e.g. root=/dev/nfs).
274 bool "Always use the default kernel command string"
276 Always use the default kernel command string, even if the boot
277 loader passes other arguments to the kernel.
278 This is useful if you cannot or don't want to change the
279 command-line options your boot loader passes to the kernel.
283 menu "Userspace binary formats"
285 source "fs/Kconfig.binfmt"
288 bool "Kernel support for 32-bit EL0"
289 depends on !ARM64_64K_PAGES
290 select COMPAT_BINFMT_ELF
292 select OLD_SIGSUSPEND3
293 select COMPAT_OLD_SIGACTION
295 This option enables support for a 32-bit EL0 running under a 64-bit
296 kernel at EL1. AArch32-specific components such as system calls,
297 the user helper functions, VFP support and the ptrace interface are
298 handled appropriately by the kernel.
300 If you want to execute 32-bit userspace applications, say Y.
302 config SYSVIPC_COMPAT
304 depends on COMPAT && SYSVIPC
308 menu "Power management options"
310 source "kernel/power/Kconfig"
312 config ARCH_SUSPEND_POSSIBLE
315 config ARM64_CPU_SUSPEND
320 menu "CPU Power Management"
322 source "drivers/cpuidle/Kconfig"
324 source "drivers/cpufreq/Kconfig"
330 source "drivers/Kconfig"
334 source "arch/arm64/kvm/Kconfig"
336 source "arch/arm64/Kconfig.debug"
338 source "security/Kconfig"
340 source "crypto/Kconfig"