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 AUDIT_ARCH_COMPAT_GENERIC
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_AUDITSYSCALL
33 select HAVE_ARCH_JUMP_LABEL
35 select HAVE_ARCH_TRACEHOOK
36 select HAVE_C_RECORDMCOUNT
37 select HAVE_CC_STACKPROTECTOR
38 select HAVE_DEBUG_BUGVERBOSE
39 select HAVE_DEBUG_KMEMLEAK
40 select HAVE_DMA_API_DEBUG
42 select HAVE_DMA_CONTIGUOUS
43 select HAVE_DYNAMIC_FTRACE
44 select HAVE_EFFICIENT_UNALIGNED_ACCESS
45 select HAVE_FTRACE_MCOUNT_RECORD
46 select HAVE_FUNCTION_TRACER
47 select HAVE_FUNCTION_GRAPH_TRACER
48 select HAVE_GENERIC_DMA_COHERENT
49 select HAVE_HW_BREAKPOINT if PERF_EVENTS
51 select HAVE_PATA_PLATFORM
52 select HAVE_PERF_EVENTS
54 select HAVE_PERF_USER_STACK_DUMP
55 select HAVE_SYSCALL_TRACEPOINTS
57 select MODULES_USE_ELF_RELA
60 select OF_EARLY_FLATTREE
61 select OF_RESERVED_MEM
62 select PERF_USE_VMALLOC
67 select SYSCTL_EXCEPTION_TRACE
68 select HAVE_CONTEXT_TRACKING
70 ARM 64-bit (AArch64) Linux support.
75 config ARCH_PHYS_ADDR_T_64BIT
84 config STACKTRACE_SUPPORT
87 config LOCKDEP_SUPPORT
90 config TRACE_IRQFLAGS_SUPPORT
93 config RWSEM_XCHGADD_ALGORITHM
96 config GENERIC_HWEIGHT
102 config GENERIC_CALIBRATE_DELAY
108 config ARCH_DMA_ADDR_T_64BIT
111 config NEED_DMA_MAP_STATE
114 config NEED_SG_DMA_LENGTH
123 config KERNEL_MODE_NEON
126 config FIX_EARLYCON_MEM
129 source "init/Kconfig"
131 source "kernel/Kconfig.freezer"
133 menu "Platform selection"
136 bool "ARMv8 software model (Versatile Express)"
137 select ARCH_REQUIRE_GPIOLIB
138 select COMMON_CLK_VERSATILE
139 select POWER_RESET_VEXPRESS
140 select VEXPRESS_CONFIG
142 This enables support for the ARMv8 software model (Versatile
146 bool "AppliedMicro X-Gene SOC Family"
148 This enables support for AppliedMicro X-Gene SOC Family
159 menu "Kernel Features"
161 config ARM64_64K_PAGES
162 bool "Enable 64KB pages support"
164 This feature enables 64KB pages support (4KB by default)
165 allowing only two levels of page tables and faster TLB
166 look-up. AArch32 emulation is not available when this feature
169 config CPU_BIG_ENDIAN
170 bool "Build big-endian kernel"
172 Say Y if you plan on running a kernel in big-endian mode.
175 bool "Symmetric Multi-Processing"
177 This enables support for systems with more than one CPU. If
178 you say N here, the kernel will run on single and
179 multiprocessor machines, but will use only one CPU of a
180 multiprocessor machine. If you say Y here, the kernel will run
181 on many, but not all, single processor machines. On a single
182 processor machine, the kernel will run faster if you say N
185 If you don't know what to do here, say N.
188 bool "Multi-core scheduler support"
191 Multi-core scheduler support improves the CPU scheduler's decision
192 making when dealing with multi-core CPU chips at a cost of slightly
193 increased overhead in some places. If unsure say N here.
196 bool "SMT scheduler support"
199 Improves the CPU scheduler's decision making when dealing with
200 MultiThreading at a cost of slightly increased overhead in some
201 places. If unsure say N here.
204 int "Maximum number of CPUs (2-32)"
207 # These have to remain sorted largest to smallest
211 bool "Support for hot-pluggable CPUs"
214 Say Y here to experiment with turning CPUs off and on. CPUs
215 can be controlled through /sys/devices/system/cpu.
217 source kernel/Kconfig.preempt
223 config ARCH_HAS_HOLES_MEMORYMODEL
224 def_bool y if SPARSEMEM
226 config ARCH_SPARSEMEM_ENABLE
228 select SPARSEMEM_VMEMMAP_ENABLE
230 config ARCH_SPARSEMEM_DEFAULT
231 def_bool ARCH_SPARSEMEM_ENABLE
233 config ARCH_SELECT_MEMORY_MODEL
234 def_bool ARCH_SPARSEMEM_ENABLE
236 config HAVE_ARCH_PFN_VALID
237 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
239 config HW_PERF_EVENTS
240 bool "Enable hardware performance counter support for perf events"
241 depends on PERF_EVENTS
244 Enable hardware performance counter support for perf events. If
245 disabled, perf events will use software events only.
247 config SYS_SUPPORTS_HUGETLBFS
250 config ARCH_WANT_GENERAL_HUGETLB
253 config ARCH_WANT_HUGE_PMD_SHARE
254 def_bool y if !ARM64_64K_PAGES
256 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
259 config ARCH_HAS_CACHE_LINE_SIZE
269 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
270 depends on ARM64 && OF
273 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
275 config FORCE_MAX_ZONEORDER
277 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
285 string "Default kernel command string"
288 Provide a set of default command-line options at build time by
289 entering them here. As a minimum, you should specify the the
290 root device (e.g. root=/dev/nfs).
293 bool "Always use the default kernel command string"
295 Always use the default kernel command string, even if the boot
296 loader passes other arguments to the kernel.
297 This is useful if you cannot or don't want to change the
298 command-line options your boot loader passes to the kernel.
301 bool "UEFI runtime support"
302 depends on OF && !CPU_BIG_ENDIAN
305 select EFI_PARAMS_FROM_FDT
308 This option provides support for runtime services provided
309 by UEFI firmware (such as non-volatile variables, realtime
310 clock, and platform reset). A UEFI stub is also provided to
311 allow the kernel to be booted as an EFI application. This
312 is only useful on systems that have UEFI firmware.
316 menu "Userspace binary formats"
318 source "fs/Kconfig.binfmt"
321 bool "Kernel support for 32-bit EL0"
322 depends on !ARM64_64K_PAGES
323 select COMPAT_BINFMT_ELF
325 select OLD_SIGSUSPEND3
326 select COMPAT_OLD_SIGACTION
328 This option enables support for a 32-bit EL0 running under a 64-bit
329 kernel at EL1. AArch32-specific components such as system calls,
330 the user helper functions, VFP support and the ptrace interface are
331 handled appropriately by the kernel.
333 If you want to execute 32-bit userspace applications, say Y.
335 config SYSVIPC_COMPAT
337 depends on COMPAT && SYSVIPC
341 menu "Power management options"
343 source "kernel/power/Kconfig"
345 config ARCH_SUSPEND_POSSIBLE
348 config ARM64_CPU_SUSPEND
353 menu "CPU Power Management"
355 source "drivers/cpuidle/Kconfig"
357 source "drivers/cpufreq/Kconfig"
363 source "drivers/Kconfig"
365 source "drivers/firmware/Kconfig"
369 source "arch/arm64/kvm/Kconfig"
371 source "arch/arm64/Kconfig.debug"
373 source "security/Kconfig"
375 source "crypto/Kconfig"
377 source "arch/arm64/crypto/Kconfig"