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_CC_STACKPROTECTOR
36 select HAVE_DEBUG_BUGVERBOSE
37 select HAVE_DEBUG_KMEMLEAK
38 select HAVE_DMA_API_DEBUG
40 select HAVE_DMA_CONTIGUOUS
41 select HAVE_DYNAMIC_FTRACE
42 select HAVE_EFFICIENT_UNALIGNED_ACCESS
43 select HAVE_FTRACE_MCOUNT_RECORD
44 select HAVE_FUNCTION_TRACER
45 select HAVE_FUNCTION_GRAPH_TRACER
46 select HAVE_GENERIC_DMA_COHERENT
47 select HAVE_HW_BREAKPOINT if PERF_EVENTS
49 select HAVE_PATA_PLATFORM
50 select HAVE_PERF_EVENTS
52 select HAVE_PERF_USER_STACK_DUMP
53 select HAVE_SYSCALL_TRACEPOINTS
55 select MODULES_USE_ELF_RELA
58 select OF_EARLY_FLATTREE
59 select OF_RESERVED_MEM
60 select PERF_USE_VMALLOC
65 select SYSCTL_EXCEPTION_TRACE
66 select HAVE_CONTEXT_TRACKING
68 ARM 64-bit (AArch64) Linux support.
73 config ARCH_PHYS_ADDR_T_64BIT
82 config STACKTRACE_SUPPORT
85 config LOCKDEP_SUPPORT
88 config TRACE_IRQFLAGS_SUPPORT
91 config RWSEM_XCHGADD_ALGORITHM
94 config GENERIC_HWEIGHT
100 config GENERIC_CALIBRATE_DELAY
106 config ARCH_DMA_ADDR_T_64BIT
109 config NEED_DMA_MAP_STATE
112 config NEED_SG_DMA_LENGTH
121 config KERNEL_MODE_NEON
124 config FIX_EARLYCON_MEM
127 source "init/Kconfig"
129 source "kernel/Kconfig.freezer"
131 menu "Platform selection"
134 bool "ARMv8 software model (Versatile Express)"
135 select ARCH_REQUIRE_GPIOLIB
136 select COMMON_CLK_VERSATILE
137 select POWER_RESET_VEXPRESS
138 select VEXPRESS_CONFIG
140 This enables support for the ARMv8 software model (Versatile
144 bool "AppliedMicro X-Gene SOC Family"
146 This enables support for AppliedMicro X-Gene SOC Family
157 menu "Kernel Features"
159 config ARM64_64K_PAGES
160 bool "Enable 64KB pages support"
162 This feature enables 64KB pages support (4KB by default)
163 allowing only two levels of page tables and faster TLB
164 look-up. AArch32 emulation is not available when this feature
167 config CPU_BIG_ENDIAN
168 bool "Build big-endian kernel"
170 Say Y if you plan on running a kernel in big-endian mode.
173 bool "Symmetric Multi-Processing"
175 This enables support for systems with more than one CPU. If
176 you say N here, the kernel will run on single and
177 multiprocessor machines, but will use only one CPU of a
178 multiprocessor machine. If you say Y here, the kernel will run
179 on many, but not all, single processor machines. On a single
180 processor machine, the kernel will run faster if you say N
183 If you don't know what to do here, say N.
186 bool "Multi-core scheduler support"
189 Multi-core scheduler support improves the CPU scheduler's decision
190 making when dealing with multi-core CPU chips at a cost of slightly
191 increased overhead in some places. If unsure say N here.
194 bool "SMT scheduler support"
197 Improves the CPU scheduler's decision making when dealing with
198 MultiThreading at a cost of slightly increased overhead in some
199 places. If unsure say N here.
202 int "Maximum number of CPUs (2-32)"
205 # These have to remain sorted largest to smallest
209 bool "Support for hot-pluggable CPUs"
212 Say Y here to experiment with turning CPUs off and on. CPUs
213 can be controlled through /sys/devices/system/cpu.
215 source kernel/Kconfig.preempt
221 config ARCH_HAS_HOLES_MEMORYMODEL
222 def_bool y if SPARSEMEM
224 config ARCH_SPARSEMEM_ENABLE
226 select SPARSEMEM_VMEMMAP_ENABLE
228 config ARCH_SPARSEMEM_DEFAULT
229 def_bool ARCH_SPARSEMEM_ENABLE
231 config ARCH_SELECT_MEMORY_MODEL
232 def_bool ARCH_SPARSEMEM_ENABLE
234 config HAVE_ARCH_PFN_VALID
235 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
237 config HW_PERF_EVENTS
238 bool "Enable hardware performance counter support for perf events"
239 depends on PERF_EVENTS
242 Enable hardware performance counter support for perf events. If
243 disabled, perf events will use software events only.
245 config SYS_SUPPORTS_HUGETLBFS
248 config ARCH_WANT_GENERAL_HUGETLB
251 config ARCH_WANT_HUGE_PMD_SHARE
252 def_bool y if !ARM64_64K_PAGES
254 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
257 config ARCH_HAS_CACHE_LINE_SIZE
267 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
268 depends on ARM64 && OF
271 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
273 config FORCE_MAX_ZONEORDER
275 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
283 string "Default kernel command string"
286 Provide a set of default command-line options at build time by
287 entering them here. As a minimum, you should specify the the
288 root device (e.g. root=/dev/nfs).
291 bool "Always use the default kernel command string"
293 Always use the default kernel command string, even if the boot
294 loader passes other arguments to the kernel.
295 This is useful if you cannot or don't want to change the
296 command-line options your boot loader passes to the kernel.
299 bool "UEFI runtime support"
300 depends on OF && !CPU_BIG_ENDIAN
303 select EFI_PARAMS_FROM_FDT
306 This option provides support for runtime services provided
307 by UEFI firmware (such as non-volatile variables, realtime
308 clock, and platform reset). A UEFI stub is also provided to
309 allow the kernel to be booted as an EFI application. This
310 is only useful on systems that have UEFI firmware.
314 menu "Userspace binary formats"
316 source "fs/Kconfig.binfmt"
319 bool "Kernel support for 32-bit EL0"
320 depends on !ARM64_64K_PAGES
321 select COMPAT_BINFMT_ELF
323 select OLD_SIGSUSPEND3
324 select COMPAT_OLD_SIGACTION
326 This option enables support for a 32-bit EL0 running under a 64-bit
327 kernel at EL1. AArch32-specific components such as system calls,
328 the user helper functions, VFP support and the ptrace interface are
329 handled appropriately by the kernel.
331 If you want to execute 32-bit userspace applications, say Y.
333 config SYSVIPC_COMPAT
335 depends on COMPAT && SYSVIPC
339 menu "Power management options"
341 source "kernel/power/Kconfig"
343 config ARCH_SUSPEND_POSSIBLE
346 config ARM64_CPU_SUSPEND
351 menu "CPU Power Management"
353 source "drivers/cpuidle/Kconfig"
355 source "drivers/cpufreq/Kconfig"
361 source "drivers/Kconfig"
363 source "drivers/firmware/Kconfig"
367 source "arch/arm64/kvm/Kconfig"
369 source "arch/arm64/Kconfig.debug"
371 source "security/Kconfig"
373 source "crypto/Kconfig"
375 source "arch/arm64/crypto/Kconfig"