3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
4 select ARCH_HAS_SG_CHAIN
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 AUDIT_ARCH_COMPAT_GENERIC
16 select BUILDTIME_EXTABLE_SORT
17 select CLONE_BACKWARDS
19 select CPU_PM if (SUSPEND || CPU_IDLE)
20 select DCACHE_WORD_ACCESS
21 select GENERIC_ALLOCATOR
22 select GENERIC_CLOCKEVENTS
23 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
24 select GENERIC_CPU_AUTOPROBE
25 select GENERIC_EARLY_IOREMAP
27 select GENERIC_IRQ_PROBE
28 select GENERIC_IRQ_SHOW
29 select GENERIC_SCHED_CLOCK
30 select GENERIC_SMP_IDLE_THREAD
31 select GENERIC_STRNCPY_FROM_USER
32 select GENERIC_STRNLEN_USER
33 select GENERIC_TIME_VSYSCALL
34 select HANDLE_DOMAIN_IRQ
35 select HARDIRQS_SW_RESEND
36 select HAVE_ARCH_AUDITSYSCALL
37 select HAVE_ARCH_JUMP_LABEL
39 select HAVE_ARCH_TRACEHOOK
41 select HAVE_C_RECORDMCOUNT
42 select HAVE_CC_STACKPROTECTOR
43 select HAVE_DEBUG_BUGVERBOSE
44 select HAVE_DEBUG_KMEMLEAK
45 select HAVE_DMA_API_DEBUG
47 select HAVE_DMA_CONTIGUOUS
48 select HAVE_DYNAMIC_FTRACE
49 select HAVE_EFFICIENT_UNALIGNED_ACCESS
50 select HAVE_FTRACE_MCOUNT_RECORD
51 select HAVE_FUNCTION_TRACER
52 select HAVE_FUNCTION_GRAPH_TRACER
53 select HAVE_GENERIC_DMA_COHERENT
54 select HAVE_HW_BREAKPOINT if PERF_EVENTS
56 select HAVE_PATA_PLATFORM
57 select HAVE_PERF_EVENTS
59 select HAVE_PERF_USER_STACK_DUMP
60 select HAVE_SYSCALL_TRACEPOINTS
62 select MODULES_USE_ELF_RELA
65 select OF_EARLY_FLATTREE
66 select OF_RESERVED_MEM
67 select PERF_USE_VMALLOC
72 select SYSCTL_EXCEPTION_TRACE
73 select HAVE_CONTEXT_TRACKING
75 ARM 64-bit (AArch64) Linux support.
80 config ARCH_PHYS_ADDR_T_64BIT
89 config STACKTRACE_SUPPORT
92 config LOCKDEP_SUPPORT
95 config TRACE_IRQFLAGS_SUPPORT
98 config RWSEM_XCHGADD_ALGORITHM
101 config GENERIC_HWEIGHT
107 config GENERIC_CALIBRATE_DELAY
113 config ARCH_DMA_ADDR_T_64BIT
116 config NEED_DMA_MAP_STATE
119 config NEED_SG_DMA_LENGTH
128 config KERNEL_MODE_NEON
131 config FIX_EARLYCON_MEM
134 source "init/Kconfig"
136 source "kernel/Kconfig.freezer"
138 menu "Platform selection"
141 bool "Cavium Inc. Thunder SoC Family"
143 This enables support for Cavium's Thunder Family of SoCs.
146 bool "ARMv8 software model (Versatile Express)"
147 select ARCH_REQUIRE_GPIOLIB
148 select COMMON_CLK_VERSATILE
149 select POWER_RESET_VEXPRESS
150 select VEXPRESS_CONFIG
152 This enables support for the ARMv8 software model (Versatile
156 bool "AppliedMicro X-Gene SOC Family"
158 This enables support for AppliedMicro X-Gene SOC Family
169 menu "Kernel Features"
173 default ARM64_4K_PAGES
175 Page size (translation granule) configuration.
177 config ARM64_4K_PAGES
180 This feature enables 4KB pages support.
182 config ARM64_64K_PAGES
185 This feature enables 64KB pages support (4KB by default)
186 allowing only two levels of page tables and faster TLB
187 look-up. AArch32 emulation is not available when this feature
193 prompt "Virtual address space size"
194 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
195 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
197 Allows choosing one of multiple possible virtual address
198 space sizes. The level of translation table is determined by
199 a combination of page size and virtual address space size.
201 config ARM64_VA_BITS_39
203 depends on ARM64_4K_PAGES
205 config ARM64_VA_BITS_42
207 depends on ARM64_64K_PAGES
209 config ARM64_VA_BITS_48
217 default 39 if ARM64_VA_BITS_39
218 default 42 if ARM64_VA_BITS_42
219 default 48 if ARM64_VA_BITS_48
221 config ARM64_PGTABLE_LEVELS
223 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
224 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
225 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
226 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
228 config CPU_BIG_ENDIAN
229 bool "Build big-endian kernel"
231 Say Y if you plan on running a kernel in big-endian mode.
234 bool "Symmetric Multi-Processing"
236 This enables support for systems with more than one CPU. If
237 you say N here, the kernel will run on single and
238 multiprocessor machines, but will use only one CPU of a
239 multiprocessor machine. If you say Y here, the kernel will run
240 on many, but not all, single processor machines. On a single
241 processor machine, the kernel will run faster if you say N
244 If you don't know what to do here, say N.
247 bool "Multi-core scheduler support"
250 Multi-core scheduler support improves the CPU scheduler's decision
251 making when dealing with multi-core CPU chips at a cost of slightly
252 increased overhead in some places. If unsure say N here.
255 bool "SMT scheduler support"
258 Improves the CPU scheduler's decision making when dealing with
259 MultiThreading at a cost of slightly increased overhead in some
260 places. If unsure say N here.
263 int "Maximum number of CPUs (2-64)"
266 # These have to remain sorted largest to smallest
270 bool "Support for hot-pluggable CPUs"
273 Say Y here to experiment with turning CPUs off and on. CPUs
274 can be controlled through /sys/devices/system/cpu.
276 source kernel/Kconfig.preempt
282 config ARCH_HAS_HOLES_MEMORYMODEL
283 def_bool y if SPARSEMEM
285 config ARCH_SPARSEMEM_ENABLE
287 select SPARSEMEM_VMEMMAP_ENABLE
289 config ARCH_SPARSEMEM_DEFAULT
290 def_bool ARCH_SPARSEMEM_ENABLE
292 config ARCH_SELECT_MEMORY_MODEL
293 def_bool ARCH_SPARSEMEM_ENABLE
295 config HAVE_ARCH_PFN_VALID
296 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
298 config HW_PERF_EVENTS
299 bool "Enable hardware performance counter support for perf events"
300 depends on PERF_EVENTS
303 Enable hardware performance counter support for perf events. If
304 disabled, perf events will use software events only.
306 config SYS_SUPPORTS_HUGETLBFS
309 config ARCH_WANT_GENERAL_HUGETLB
312 config ARCH_WANT_HUGE_PMD_SHARE
313 def_bool y if !ARM64_64K_PAGES
315 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
318 config ARCH_HAS_CACHE_LINE_SIZE
328 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
329 depends on ARM64 && OF
332 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
334 config FORCE_MAX_ZONEORDER
336 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
344 string "Default kernel command string"
347 Provide a set of default command-line options at build time by
348 entering them here. As a minimum, you should specify the the
349 root device (e.g. root=/dev/nfs).
352 bool "Always use the default kernel command string"
354 Always use the default kernel command string, even if the boot
355 loader passes other arguments to the kernel.
356 This is useful if you cannot or don't want to change the
357 command-line options your boot loader passes to the kernel.
363 bool "UEFI runtime support"
364 depends on OF && !CPU_BIG_ENDIAN
367 select EFI_PARAMS_FROM_FDT
368 select EFI_RUNTIME_WRAPPERS
373 This option provides support for runtime services provided
374 by UEFI firmware (such as non-volatile variables, realtime
375 clock, and platform reset). A UEFI stub is also provided to
376 allow the kernel to be booted as an EFI application. This
377 is only useful on systems that have UEFI firmware.
381 menu "Userspace binary formats"
383 source "fs/Kconfig.binfmt"
386 bool "Kernel support for 32-bit EL0"
387 depends on !ARM64_64K_PAGES
388 select COMPAT_BINFMT_ELF
390 select OLD_SIGSUSPEND3
391 select COMPAT_OLD_SIGACTION
393 This option enables support for a 32-bit EL0 running under a 64-bit
394 kernel at EL1. AArch32-specific components such as system calls,
395 the user helper functions, VFP support and the ptrace interface are
396 handled appropriately by the kernel.
398 If you want to execute 32-bit userspace applications, say Y.
400 config SYSVIPC_COMPAT
402 depends on COMPAT && SYSVIPC
406 menu "Power management options"
408 source "kernel/power/Kconfig"
410 config ARCH_SUSPEND_POSSIBLE
413 config ARM64_CPU_SUSPEND
418 menu "CPU Power Management"
420 source "drivers/cpuidle/Kconfig"
422 source "drivers/cpufreq/Kconfig"
428 source "drivers/Kconfig"
430 source "drivers/firmware/Kconfig"
434 source "arch/arm64/kvm/Kconfig"
436 source "arch/arm64/Kconfig.debug"
438 source "security/Kconfig"
440 source "crypto/Kconfig"
442 source "arch/arm64/crypto/Kconfig"