3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
5 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
6 select ARCH_USE_CMPXCHG_LOCKREF
7 select ARCH_WANT_OPTIONAL_GPIOLIB
8 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
9 select ARCH_WANT_FRAME_POINTERS
13 select BUILDTIME_EXTABLE_SORT
14 select CLONE_BACKWARDS
16 select CPU_PM if (SUSPEND || CPU_IDLE)
17 select DCACHE_WORD_ACCESS
18 select GENERIC_CLOCKEVENTS
19 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
20 select GENERIC_CPU_AUTOPROBE
21 select GENERIC_EARLY_IOREMAP
23 select GENERIC_IRQ_PROBE
24 select GENERIC_IRQ_SHOW
25 select GENERIC_SCHED_CLOCK
26 select GENERIC_SMP_IDLE_THREAD
27 select GENERIC_STRNCPY_FROM_USER
28 select GENERIC_STRNLEN_USER
29 select GENERIC_TIME_VSYSCALL
30 select HARDIRQS_SW_RESEND
31 select HAVE_ARCH_JUMP_LABEL
33 select HAVE_ARCH_TRACEHOOK
34 select HAVE_C_RECORDMCOUNT
35 select HAVE_DEBUG_BUGVERBOSE
36 select HAVE_DEBUG_KMEMLEAK
37 select HAVE_DMA_API_DEBUG
39 select HAVE_DMA_CONTIGUOUS
40 select HAVE_DYNAMIC_FTRACE
41 select HAVE_EFFICIENT_UNALIGNED_ACCESS
42 select HAVE_FTRACE_MCOUNT_RECORD
43 select HAVE_FUNCTION_TRACER
44 select HAVE_FUNCTION_GRAPH_TRACER
45 select HAVE_GENERIC_DMA_COHERENT
46 select HAVE_HW_BREAKPOINT if PERF_EVENTS
48 select HAVE_PATA_PLATFORM
49 select HAVE_PERF_EVENTS
51 select HAVE_PERF_USER_STACK_DUMP
52 select HAVE_SYSCALL_TRACEPOINTS
54 select MODULES_USE_ELF_RELA
57 select OF_EARLY_FLATTREE
58 select OF_RESERVED_MEM
59 select PERF_USE_VMALLOC
64 select SYSCTL_EXCEPTION_TRACE
66 ARM 64-bit (AArch64) Linux support.
71 config ARCH_PHYS_ADDR_T_64BIT
80 config STACKTRACE_SUPPORT
83 config LOCKDEP_SUPPORT
86 config TRACE_IRQFLAGS_SUPPORT
89 config RWSEM_XCHGADD_ALGORITHM
92 config GENERIC_HWEIGHT
98 config GENERIC_CALIBRATE_DELAY
104 config ARCH_DMA_ADDR_T_64BIT
107 config NEED_DMA_MAP_STATE
110 config NEED_SG_DMA_LENGTH
119 config KERNEL_MODE_NEON
122 config FIX_EARLYCON_MEM
125 source "init/Kconfig"
127 source "kernel/Kconfig.freezer"
129 menu "Platform selection"
132 bool "ARMv8 software model (Versatile Express)"
133 select ARCH_REQUIRE_GPIOLIB
134 select COMMON_CLK_VERSATILE
135 select POWER_RESET_VEXPRESS
136 select VEXPRESS_CONFIG
138 This enables support for the ARMv8 software model (Versatile
142 bool "AppliedMicro X-Gene SOC Family"
144 This enables support for AppliedMicro X-Gene SOC Family
155 menu "Kernel Features"
157 config ARM64_64K_PAGES
158 bool "Enable 64KB pages support"
160 This feature enables 64KB pages support (4KB by default)
161 allowing only two levels of page tables and faster TLB
162 look-up. AArch32 emulation is not available when this feature
165 config CPU_BIG_ENDIAN
166 bool "Build big-endian kernel"
168 Say Y if you plan on running a kernel in big-endian mode.
171 bool "Symmetric Multi-Processing"
173 This enables support for systems with more than one CPU. If
174 you say N here, the kernel will run on single and
175 multiprocessor machines, but will use only one CPU of a
176 multiprocessor machine. If you say Y here, the kernel will run
177 on many, but not all, single processor machines. On a single
178 processor machine, the kernel will run faster if you say N
181 If you don't know what to do here, say N.
184 bool "Multi-core scheduler support"
187 Multi-core scheduler support improves the CPU scheduler's decision
188 making when dealing with multi-core CPU chips at a cost of slightly
189 increased overhead in some places. If unsure say N here.
192 bool "SMT scheduler support"
195 Improves the CPU scheduler's decision making when dealing with
196 MultiThreading at a cost of slightly increased overhead in some
197 places. If unsure say N here.
200 int "Maximum number of CPUs (2-32)"
203 # These have to remain sorted largest to smallest
207 bool "Support for hot-pluggable CPUs"
210 Say Y here to experiment with turning CPUs off and on. CPUs
211 can be controlled through /sys/devices/system/cpu.
213 source kernel/Kconfig.preempt
219 config ARCH_HAS_HOLES_MEMORYMODEL
220 def_bool y if SPARSEMEM
222 config ARCH_SPARSEMEM_ENABLE
224 select SPARSEMEM_VMEMMAP_ENABLE
226 config ARCH_SPARSEMEM_DEFAULT
227 def_bool ARCH_SPARSEMEM_ENABLE
229 config ARCH_SELECT_MEMORY_MODEL
230 def_bool ARCH_SPARSEMEM_ENABLE
232 config HAVE_ARCH_PFN_VALID
233 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
235 config HW_PERF_EVENTS
236 bool "Enable hardware performance counter support for perf events"
237 depends on PERF_EVENTS
240 Enable hardware performance counter support for perf events. If
241 disabled, perf events will use software events only.
243 config SYS_SUPPORTS_HUGETLBFS
246 config ARCH_WANT_GENERAL_HUGETLB
249 config ARCH_WANT_HUGE_PMD_SHARE
250 def_bool y if !ARM64_64K_PAGES
252 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
255 config ARCH_HAS_CACHE_LINE_SIZE
265 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
266 depends on ARM64 && OF
269 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
271 config FORCE_MAX_ZONEORDER
273 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
281 string "Default kernel command string"
284 Provide a set of default command-line options at build time by
285 entering them here. As a minimum, you should specify the the
286 root device (e.g. root=/dev/nfs).
289 bool "Always use the default kernel command string"
291 Always use the default kernel command string, even if the boot
292 loader passes other arguments to the kernel.
293 This is useful if you cannot or don't want to change the
294 command-line options your boot loader passes to the kernel.
297 bool "UEFI runtime support"
298 depends on OF && !CPU_BIG_ENDIAN
301 select EFI_PARAMS_FROM_FDT
304 This option provides support for runtime services provided
305 by UEFI firmware (such as non-volatile variables, realtime
306 clock, and platform reset). A UEFI stub is also provided to
307 allow the kernel to be booted as an EFI application. This
308 is only useful on systems that have UEFI firmware.
312 menu "Userspace binary formats"
314 source "fs/Kconfig.binfmt"
317 bool "Kernel support for 32-bit EL0"
318 depends on !ARM64_64K_PAGES
319 select COMPAT_BINFMT_ELF
321 select OLD_SIGSUSPEND3
322 select COMPAT_OLD_SIGACTION
324 This option enables support for a 32-bit EL0 running under a 64-bit
325 kernel at EL1. AArch32-specific components such as system calls,
326 the user helper functions, VFP support and the ptrace interface are
327 handled appropriately by the kernel.
329 If you want to execute 32-bit userspace applications, say Y.
331 config SYSVIPC_COMPAT
333 depends on COMPAT && SYSVIPC
337 menu "Power management options"
339 source "kernel/power/Kconfig"
341 config ARCH_SUSPEND_POSSIBLE
344 config ARM64_CPU_SUSPEND
349 menu "CPU Power Management"
351 source "drivers/cpuidle/Kconfig"
353 source "drivers/cpufreq/Kconfig"
359 source "drivers/Kconfig"
361 source "drivers/firmware/Kconfig"
365 source "arch/arm64/kvm/Kconfig"
367 source "arch/arm64/Kconfig.debug"
369 source "security/Kconfig"
371 source "crypto/Kconfig"
373 source "arch/arm64/crypto/Kconfig"