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_C_RECORDMCOUNT
34 select HAVE_DEBUG_BUGVERBOSE
35 select HAVE_DEBUG_KMEMLEAK
36 select HAVE_DMA_API_DEBUG
38 select HAVE_DMA_CONTIGUOUS
39 select HAVE_DYNAMIC_FTRACE
40 select HAVE_EFFICIENT_UNALIGNED_ACCESS
41 select HAVE_FTRACE_MCOUNT_RECORD
42 select HAVE_FUNCTION_TRACER
43 select HAVE_FUNCTION_GRAPH_TRACER
44 select HAVE_GENERIC_DMA_COHERENT
45 select HAVE_HW_BREAKPOINT if PERF_EVENTS
47 select HAVE_PATA_PLATFORM
48 select HAVE_PERF_EVENTS
50 select HAVE_PERF_USER_STACK_DUMP
51 select HAVE_SYSCALL_TRACEPOINTS
53 select MODULES_USE_ELF_RELA
56 select OF_EARLY_FLATTREE
57 select OF_RESERVED_MEM
58 select PERF_USE_VMALLOC
63 select SYSCTL_EXCEPTION_TRACE
65 ARM 64-bit (AArch64) Linux support.
70 config ARCH_PHYS_ADDR_T_64BIT
79 config STACKTRACE_SUPPORT
82 config LOCKDEP_SUPPORT
85 config TRACE_IRQFLAGS_SUPPORT
88 config RWSEM_XCHGADD_ALGORITHM
91 config GENERIC_HWEIGHT
97 config GENERIC_CALIBRATE_DELAY
103 config ARCH_DMA_ADDR_T_64BIT
106 config NEED_DMA_MAP_STATE
109 config NEED_SG_DMA_LENGTH
118 config KERNEL_MODE_NEON
121 config FIX_EARLYCON_MEM
124 source "init/Kconfig"
126 source "kernel/Kconfig.freezer"
128 menu "Platform selection"
131 bool "ARMv8 software model (Versatile Express)"
132 select ARCH_REQUIRE_GPIOLIB
133 select COMMON_CLK_VERSATILE
134 select POWER_RESET_VEXPRESS
135 select VEXPRESS_CONFIG
137 This enables support for the ARMv8 software model (Versatile
141 bool "AppliedMicro X-Gene SOC Family"
143 This enables support for AppliedMicro X-Gene SOC Family
154 menu "Kernel Features"
156 config ARM64_64K_PAGES
157 bool "Enable 64KB pages support"
159 This feature enables 64KB pages support (4KB by default)
160 allowing only two levels of page tables and faster TLB
161 look-up. AArch32 emulation is not available when this feature
164 config CPU_BIG_ENDIAN
165 bool "Build big-endian kernel"
167 Say Y if you plan on running a kernel in big-endian mode.
170 bool "Symmetric Multi-Processing"
172 This enables support for systems with more than one CPU. If
173 you say N here, the kernel will run on single and
174 multiprocessor machines, but will use only one CPU of a
175 multiprocessor machine. If you say Y here, the kernel will run
176 on many, but not all, single processor machines. On a single
177 processor machine, the kernel will run faster if you say N
180 If you don't know what to do here, say N.
183 bool "Multi-core scheduler support"
186 Multi-core scheduler support improves the CPU scheduler's decision
187 making when dealing with multi-core CPU chips at a cost of slightly
188 increased overhead in some places. If unsure say N here.
191 bool "SMT scheduler support"
194 Improves the CPU scheduler's decision making when dealing with
195 MultiThreading at a cost of slightly increased overhead in some
196 places. If unsure say N here.
199 int "Maximum number of CPUs (2-32)"
202 # These have to remain sorted largest to smallest
206 bool "Support for hot-pluggable CPUs"
209 Say Y here to experiment with turning CPUs off and on. CPUs
210 can be controlled through /sys/devices/system/cpu.
212 source kernel/Kconfig.preempt
218 config ARCH_HAS_HOLES_MEMORYMODEL
219 def_bool y if SPARSEMEM
221 config ARCH_SPARSEMEM_ENABLE
223 select SPARSEMEM_VMEMMAP_ENABLE
225 config ARCH_SPARSEMEM_DEFAULT
226 def_bool ARCH_SPARSEMEM_ENABLE
228 config ARCH_SELECT_MEMORY_MODEL
229 def_bool ARCH_SPARSEMEM_ENABLE
231 config HAVE_ARCH_PFN_VALID
232 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
234 config HW_PERF_EVENTS
235 bool "Enable hardware performance counter support for perf events"
236 depends on PERF_EVENTS
239 Enable hardware performance counter support for perf events. If
240 disabled, perf events will use software events only.
242 config SYS_SUPPORTS_HUGETLBFS
245 config ARCH_WANT_GENERAL_HUGETLB
248 config ARCH_WANT_HUGE_PMD_SHARE
249 def_bool y if !ARM64_64K_PAGES
251 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
254 config ARCH_HAS_CACHE_LINE_SIZE
264 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
265 depends on ARM64 && OF
268 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
270 config FORCE_MAX_ZONEORDER
272 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
280 string "Default kernel command string"
283 Provide a set of default command-line options at build time by
284 entering them here. As a minimum, you should specify the the
285 root device (e.g. root=/dev/nfs).
288 bool "Always use the default kernel command string"
290 Always use the default kernel command string, even if the boot
291 loader passes other arguments to the kernel.
292 This is useful if you cannot or don't want to change the
293 command-line options your boot loader passes to the kernel.
296 bool "UEFI runtime support"
297 depends on OF && !CPU_BIG_ENDIAN
300 select EFI_PARAMS_FROM_FDT
303 This option provides support for runtime services provided
304 by UEFI firmware (such as non-volatile variables, realtime
305 clock, and platform reset). A UEFI stub is also provided to
306 allow the kernel to be booted as an EFI application. This
307 is only useful on systems that have UEFI firmware.
311 menu "Userspace binary formats"
313 source "fs/Kconfig.binfmt"
316 bool "Kernel support for 32-bit EL0"
317 depends on !ARM64_64K_PAGES
318 select COMPAT_BINFMT_ELF
320 select OLD_SIGSUSPEND3
321 select COMPAT_OLD_SIGACTION
323 This option enables support for a 32-bit EL0 running under a 64-bit
324 kernel at EL1. AArch32-specific components such as system calls,
325 the user helper functions, VFP support and the ptrace interface are
326 handled appropriately by the kernel.
328 If you want to execute 32-bit userspace applications, say Y.
330 config SYSVIPC_COMPAT
332 depends on COMPAT && SYSVIPC
336 menu "Power management options"
338 source "kernel/power/Kconfig"
340 config ARCH_SUSPEND_POSSIBLE
343 config ARM64_CPU_SUSPEND
348 menu "CPU Power Management"
350 source "drivers/cpuidle/Kconfig"
352 source "drivers/cpufreq/Kconfig"
358 source "drivers/Kconfig"
360 source "drivers/firmware/Kconfig"
364 source "arch/arm64/kvm/Kconfig"
366 source "arch/arm64/Kconfig.debug"
368 source "security/Kconfig"
370 source "crypto/Kconfig"
372 source "arch/arm64/crypto/Kconfig"