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_SUPPORTS_ATOMIC_RMW
8 select ARCH_WANT_OPTIONAL_GPIOLIB
9 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
10 select ARCH_WANT_FRAME_POINTERS
14 select BUILDTIME_EXTABLE_SORT
15 select CLONE_BACKWARDS
17 select CPU_PM if (SUSPEND || CPU_IDLE)
18 select DCACHE_WORD_ACCESS
19 select GENERIC_CLOCKEVENTS
20 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
21 select GENERIC_CPU_AUTOPROBE
22 select GENERIC_EARLY_IOREMAP
24 select GENERIC_IRQ_PROBE
25 select GENERIC_IRQ_SHOW
26 select GENERIC_SCHED_CLOCK
27 select GENERIC_SMP_IDLE_THREAD
28 select GENERIC_STRNCPY_FROM_USER
29 select GENERIC_STRNLEN_USER
30 select GENERIC_TIME_VSYSCALL
31 select HARDIRQS_SW_RESEND
32 select HAVE_ARCH_JUMP_LABEL
34 select HAVE_ARCH_TRACEHOOK
35 select HAVE_C_RECORDMCOUNT
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
67 ARM 64-bit (AArch64) Linux support.
72 config ARCH_PHYS_ADDR_T_64BIT
81 config STACKTRACE_SUPPORT
84 config LOCKDEP_SUPPORT
87 config TRACE_IRQFLAGS_SUPPORT
90 config RWSEM_XCHGADD_ALGORITHM
93 config GENERIC_HWEIGHT
99 config GENERIC_CALIBRATE_DELAY
105 config ARCH_DMA_ADDR_T_64BIT
108 config NEED_DMA_MAP_STATE
111 config NEED_SG_DMA_LENGTH
120 config KERNEL_MODE_NEON
123 config FIX_EARLYCON_MEM
126 source "init/Kconfig"
128 source "kernel/Kconfig.freezer"
130 menu "Platform selection"
133 bool "ARMv8 software model (Versatile Express)"
134 select ARCH_REQUIRE_GPIOLIB
135 select COMMON_CLK_VERSATILE
136 select POWER_RESET_VEXPRESS
137 select VEXPRESS_CONFIG
139 This enables support for the ARMv8 software model (Versatile
143 bool "AppliedMicro X-Gene SOC Family"
145 This enables support for AppliedMicro X-Gene SOC Family
156 menu "Kernel Features"
158 config ARM64_64K_PAGES
159 bool "Enable 64KB pages support"
161 This feature enables 64KB pages support (4KB by default)
162 allowing only two levels of page tables and faster TLB
163 look-up. AArch32 emulation is not available when this feature
166 config CPU_BIG_ENDIAN
167 bool "Build big-endian kernel"
169 Say Y if you plan on running a kernel in big-endian mode.
172 bool "Symmetric Multi-Processing"
174 This enables support for systems with more than one CPU. If
175 you say N here, the kernel will run on single and
176 multiprocessor machines, but will use only one CPU of a
177 multiprocessor machine. If you say Y here, the kernel will run
178 on many, but not all, single processor machines. On a single
179 processor machine, the kernel will run faster if you say N
182 If you don't know what to do here, say N.
185 bool "Multi-core scheduler support"
188 Multi-core scheduler support improves the CPU scheduler's decision
189 making when dealing with multi-core CPU chips at a cost of slightly
190 increased overhead in some places. If unsure say N here.
193 bool "SMT scheduler support"
196 Improves the CPU scheduler's decision making when dealing with
197 MultiThreading at a cost of slightly increased overhead in some
198 places. If unsure say N here.
201 int "Maximum number of CPUs (2-32)"
204 # These have to remain sorted largest to smallest
208 bool "Support for hot-pluggable CPUs"
211 Say Y here to experiment with turning CPUs off and on. CPUs
212 can be controlled through /sys/devices/system/cpu.
214 source kernel/Kconfig.preempt
220 config ARCH_HAS_HOLES_MEMORYMODEL
221 def_bool y if SPARSEMEM
223 config ARCH_SPARSEMEM_ENABLE
225 select SPARSEMEM_VMEMMAP_ENABLE
227 config ARCH_SPARSEMEM_DEFAULT
228 def_bool ARCH_SPARSEMEM_ENABLE
230 config ARCH_SELECT_MEMORY_MODEL
231 def_bool ARCH_SPARSEMEM_ENABLE
233 config HAVE_ARCH_PFN_VALID
234 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
236 config HW_PERF_EVENTS
237 bool "Enable hardware performance counter support for perf events"
238 depends on PERF_EVENTS
241 Enable hardware performance counter support for perf events. If
242 disabled, perf events will use software events only.
244 config SYS_SUPPORTS_HUGETLBFS
247 config ARCH_WANT_GENERAL_HUGETLB
250 config ARCH_WANT_HUGE_PMD_SHARE
251 def_bool y if !ARM64_64K_PAGES
253 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
256 config ARCH_HAS_CACHE_LINE_SIZE
266 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
267 depends on ARM64 && OF
270 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
272 config FORCE_MAX_ZONEORDER
274 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
282 string "Default kernel command string"
285 Provide a set of default command-line options at build time by
286 entering them here. As a minimum, you should specify the the
287 root device (e.g. root=/dev/nfs).
290 bool "Always use the default kernel command string"
292 Always use the default kernel command string, even if the boot
293 loader passes other arguments to the kernel.
294 This is useful if you cannot or don't want to change the
295 command-line options your boot loader passes to the kernel.
298 bool "UEFI runtime support"
299 depends on OF && !CPU_BIG_ENDIAN
302 select EFI_PARAMS_FROM_FDT
305 This option provides support for runtime services provided
306 by UEFI firmware (such as non-volatile variables, realtime
307 clock, and platform reset). A UEFI stub is also provided to
308 allow the kernel to be booted as an EFI application. This
309 is only useful on systems that have UEFI firmware.
313 menu "Userspace binary formats"
315 source "fs/Kconfig.binfmt"
318 bool "Kernel support for 32-bit EL0"
319 depends on !ARM64_64K_PAGES
320 select COMPAT_BINFMT_ELF
322 select OLD_SIGSUSPEND3
323 select COMPAT_OLD_SIGACTION
325 This option enables support for a 32-bit EL0 running under a 64-bit
326 kernel at EL1. AArch32-specific components such as system calls,
327 the user helper functions, VFP support and the ptrace interface are
328 handled appropriately by the kernel.
330 If you want to execute 32-bit userspace applications, say Y.
332 config SYSVIPC_COMPAT
334 depends on COMPAT && SYSVIPC
338 menu "Power management options"
340 source "kernel/power/Kconfig"
342 config ARCH_SUSPEND_POSSIBLE
345 config ARM64_CPU_SUSPEND
350 menu "CPU Power Management"
352 source "drivers/cpuidle/Kconfig"
354 source "drivers/cpufreq/Kconfig"
360 source "drivers/Kconfig"
362 source "drivers/firmware/Kconfig"
366 source "arch/arm64/kvm/Kconfig"
368 source "arch/arm64/Kconfig.debug"
370 source "security/Kconfig"
372 source "crypto/Kconfig"
374 source "arch/arm64/crypto/Kconfig"