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
20 select GENERIC_EARLY_IOREMAP
22 select GENERIC_IRQ_PROBE
23 select GENERIC_IRQ_SHOW
24 select GENERIC_SCHED_CLOCK
25 select GENERIC_SMP_IDLE_THREAD
26 select GENERIC_STRNCPY_FROM_USER
27 select GENERIC_STRNLEN_USER
28 select GENERIC_TIME_VSYSCALL
29 select HARDIRQS_SW_RESEND
30 select HAVE_ARCH_JUMP_LABEL
32 select HAVE_ARCH_TRACEHOOK
33 select HAVE_DEBUG_BUGVERBOSE
34 select HAVE_DEBUG_KMEMLEAK
35 select HAVE_DMA_API_DEBUG
37 select HAVE_DMA_CONTIGUOUS
38 select HAVE_EFFICIENT_UNALIGNED_ACCESS
39 select HAVE_GENERIC_DMA_COHERENT
40 select HAVE_HW_BREAKPOINT if PERF_EVENTS
42 select HAVE_PATA_PLATFORM
43 select HAVE_PERF_EVENTS
45 select HAVE_PERF_USER_STACK_DUMP
47 select MODULES_USE_ELF_RELA
50 select OF_EARLY_FLATTREE
51 select OF_RESERVED_MEM
52 select PERF_USE_VMALLOC
57 select SYSCTL_EXCEPTION_TRACE
59 ARM 64-bit (AArch64) Linux support.
64 config ARCH_PHYS_ADDR_T_64BIT
73 config STACKTRACE_SUPPORT
76 config LOCKDEP_SUPPORT
79 config TRACE_IRQFLAGS_SUPPORT
82 config RWSEM_XCHGADD_ALGORITHM
85 config GENERIC_HWEIGHT
91 config GENERIC_CALIBRATE_DELAY
97 config ARCH_DMA_ADDR_T_64BIT
100 config NEED_DMA_MAP_STATE
103 config NEED_SG_DMA_LENGTH
112 config KERNEL_MODE_NEON
115 config FIX_EARLYCON_MEM
118 source "init/Kconfig"
120 source "kernel/Kconfig.freezer"
122 menu "Platform selection"
125 bool "ARMv8 software model (Versatile Express)"
126 select ARCH_REQUIRE_GPIOLIB
127 select COMMON_CLK_VERSATILE
128 select POWER_RESET_VEXPRESS
129 select VEXPRESS_CONFIG
131 This enables support for the ARMv8 software model (Versatile
135 bool "AppliedMicro X-Gene SOC Family"
137 This enables support for AppliedMicro X-Gene SOC Family
148 menu "Kernel Features"
150 config ARM64_64K_PAGES
151 bool "Enable 64KB pages support"
153 This feature enables 64KB pages support (4KB by default)
154 allowing only two levels of page tables and faster TLB
155 look-up. AArch32 emulation is not available when this feature
158 config CPU_BIG_ENDIAN
159 bool "Build big-endian kernel"
161 Say Y if you plan on running a kernel in big-endian mode.
164 bool "Symmetric Multi-Processing"
166 This enables support for systems with more than one CPU. If
167 you say N here, the kernel will run on single and
168 multiprocessor machines, but will use only one CPU of a
169 multiprocessor machine. If you say Y here, the kernel will run
170 on many, but not all, single processor machines. On a single
171 processor machine, the kernel will run faster if you say N
174 If you don't know what to do here, say N.
177 bool "Multi-core scheduler support"
180 Multi-core scheduler support improves the CPU scheduler's decision
181 making when dealing with multi-core CPU chips at a cost of slightly
182 increased overhead in some places. If unsure say N here.
185 bool "SMT scheduler support"
188 Improves the CPU scheduler's decision making when dealing with
189 MultiThreading at a cost of slightly increased overhead in some
190 places. If unsure say N here.
193 int "Maximum number of CPUs (2-32)"
196 # These have to remain sorted largest to smallest
200 bool "Support for hot-pluggable CPUs"
203 Say Y here to experiment with turning CPUs off and on. CPUs
204 can be controlled through /sys/devices/system/cpu.
206 source kernel/Kconfig.preempt
212 config ARCH_HAS_HOLES_MEMORYMODEL
213 def_bool y if SPARSEMEM
215 config ARCH_SPARSEMEM_ENABLE
217 select SPARSEMEM_VMEMMAP_ENABLE
219 config ARCH_SPARSEMEM_DEFAULT
220 def_bool ARCH_SPARSEMEM_ENABLE
222 config ARCH_SELECT_MEMORY_MODEL
223 def_bool ARCH_SPARSEMEM_ENABLE
225 config HAVE_ARCH_PFN_VALID
226 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
228 config HW_PERF_EVENTS
229 bool "Enable hardware performance counter support for perf events"
230 depends on PERF_EVENTS
233 Enable hardware performance counter support for perf events. If
234 disabled, perf events will use software events only.
236 config SYS_SUPPORTS_HUGETLBFS
239 config ARCH_WANT_GENERAL_HUGETLB
242 config ARCH_WANT_HUGE_PMD_SHARE
243 def_bool y if !ARM64_64K_PAGES
245 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
255 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
256 depends on ARM64 && OF
259 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
261 config FORCE_MAX_ZONEORDER
263 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
271 string "Default kernel command string"
274 Provide a set of default command-line options at build time by
275 entering them here. As a minimum, you should specify the the
276 root device (e.g. root=/dev/nfs).
279 bool "Always use the default kernel command string"
281 Always use the default kernel command string, even if the boot
282 loader passes other arguments to the kernel.
283 This is useful if you cannot or don't want to change the
284 command-line options your boot loader passes to the kernel.
288 menu "Userspace binary formats"
290 source "fs/Kconfig.binfmt"
293 bool "Kernel support for 32-bit EL0"
294 depends on !ARM64_64K_PAGES
295 select COMPAT_BINFMT_ELF
297 select OLD_SIGSUSPEND3
298 select COMPAT_OLD_SIGACTION
300 This option enables support for a 32-bit EL0 running under a 64-bit
301 kernel at EL1. AArch32-specific components such as system calls,
302 the user helper functions, VFP support and the ptrace interface are
303 handled appropriately by the kernel.
305 If you want to execute 32-bit userspace applications, say Y.
307 config SYSVIPC_COMPAT
309 depends on COMPAT && SYSVIPC
313 menu "Power management options"
315 source "kernel/power/Kconfig"
317 config ARCH_SUSPEND_POSSIBLE
320 config ARM64_CPU_SUSPEND
325 menu "CPU Power Management"
327 source "drivers/cpuidle/Kconfig"
329 source "drivers/cpufreq/Kconfig"
335 source "drivers/Kconfig"
339 source "arch/arm64/kvm/Kconfig"
341 source "arch/arm64/Kconfig.debug"
343 source "security/Kconfig"
345 source "crypto/Kconfig"