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_RCU_TABLE_FREE
61 select HAVE_SYSCALL_TRACEPOINTS
63 select MODULES_USE_ELF_RELA
66 select OF_EARLY_FLATTREE
67 select OF_RESERVED_MEM
68 select PERF_USE_VMALLOC
73 select SYSCTL_EXCEPTION_TRACE
74 select HAVE_CONTEXT_TRACKING
76 ARM 64-bit (AArch64) Linux support.
81 config ARCH_PHYS_ADDR_T_64BIT
90 config STACKTRACE_SUPPORT
93 config LOCKDEP_SUPPORT
96 config TRACE_IRQFLAGS_SUPPORT
99 config RWSEM_XCHGADD_ALGORITHM
102 config GENERIC_HWEIGHT
108 config GENERIC_CALIBRATE_DELAY
114 config ARCH_DMA_ADDR_T_64BIT
117 config NEED_DMA_MAP_STATE
120 config NEED_SG_DMA_LENGTH
129 config KERNEL_MODE_NEON
132 config FIX_EARLYCON_MEM
135 source "init/Kconfig"
137 source "kernel/Kconfig.freezer"
139 menu "Platform selection"
142 bool "Cavium Inc. Thunder SoC Family"
144 This enables support for Cavium's Thunder Family of SoCs.
147 bool "ARMv8 software model (Versatile Express)"
148 select ARCH_REQUIRE_GPIOLIB
149 select COMMON_CLK_VERSATILE
150 select POWER_RESET_VEXPRESS
151 select VEXPRESS_CONFIG
153 This enables support for the ARMv8 software model (Versatile
157 bool "AppliedMicro X-Gene SOC Family"
159 This enables support for AppliedMicro X-Gene SOC Family
170 menu "Kernel Features"
174 default ARM64_4K_PAGES
176 Page size (translation granule) configuration.
178 config ARM64_4K_PAGES
181 This feature enables 4KB pages support.
183 config ARM64_64K_PAGES
186 This feature enables 64KB pages support (4KB by default)
187 allowing only two levels of page tables and faster TLB
188 look-up. AArch32 emulation is not available when this feature
194 prompt "Virtual address space size"
195 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
196 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
198 Allows choosing one of multiple possible virtual address
199 space sizes. The level of translation table is determined by
200 a combination of page size and virtual address space size.
202 config ARM64_VA_BITS_39
204 depends on ARM64_4K_PAGES
206 config ARM64_VA_BITS_42
208 depends on ARM64_64K_PAGES
210 config ARM64_VA_BITS_48
218 default 39 if ARM64_VA_BITS_39
219 default 42 if ARM64_VA_BITS_42
220 default 48 if ARM64_VA_BITS_48
222 config ARM64_PGTABLE_LEVELS
224 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
225 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
226 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
227 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
229 config CPU_BIG_ENDIAN
230 bool "Build big-endian kernel"
232 Say Y if you plan on running a kernel in big-endian mode.
235 bool "Symmetric Multi-Processing"
237 This enables support for systems with more than one CPU. If
238 you say N here, the kernel will run on single and
239 multiprocessor machines, but will use only one CPU of a
240 multiprocessor machine. If you say Y here, the kernel will run
241 on many, but not all, single processor machines. On a single
242 processor machine, the kernel will run faster if you say N
245 If you don't know what to do here, say N.
248 bool "Multi-core scheduler support"
251 Multi-core scheduler support improves the CPU scheduler's decision
252 making when dealing with multi-core CPU chips at a cost of slightly
253 increased overhead in some places. If unsure say N here.
256 bool "SMT scheduler support"
259 Improves the CPU scheduler's decision making when dealing with
260 MultiThreading at a cost of slightly increased overhead in some
261 places. If unsure say N here.
264 int "Maximum number of CPUs (2-64)"
267 # These have to remain sorted largest to smallest
271 bool "Support for hot-pluggable CPUs"
274 Say Y here to experiment with turning CPUs off and on. CPUs
275 can be controlled through /sys/devices/system/cpu.
277 source kernel/Kconfig.preempt
283 config ARCH_HAS_HOLES_MEMORYMODEL
284 def_bool y if SPARSEMEM
286 config ARCH_SPARSEMEM_ENABLE
288 select SPARSEMEM_VMEMMAP_ENABLE
290 config ARCH_SPARSEMEM_DEFAULT
291 def_bool ARCH_SPARSEMEM_ENABLE
293 config ARCH_SELECT_MEMORY_MODEL
294 def_bool ARCH_SPARSEMEM_ENABLE
296 config HAVE_ARCH_PFN_VALID
297 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
299 config HW_PERF_EVENTS
300 bool "Enable hardware performance counter support for perf events"
301 depends on PERF_EVENTS
304 Enable hardware performance counter support for perf events. If
305 disabled, perf events will use software events only.
307 config SYS_SUPPORTS_HUGETLBFS
310 config ARCH_WANT_GENERAL_HUGETLB
313 config ARCH_WANT_HUGE_PMD_SHARE
314 def_bool y if !ARM64_64K_PAGES
316 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
319 config ARCH_HAS_CACHE_LINE_SIZE
329 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
330 depends on ARM64 && OF
333 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
335 config FORCE_MAX_ZONEORDER
337 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
345 string "Default kernel command string"
348 Provide a set of default command-line options at build time by
349 entering them here. As a minimum, you should specify the the
350 root device (e.g. root=/dev/nfs).
353 bool "Always use the default kernel command string"
355 Always use the default kernel command string, even if the boot
356 loader passes other arguments to the kernel.
357 This is useful if you cannot or don't want to change the
358 command-line options your boot loader passes to the kernel.
364 bool "UEFI runtime support"
365 depends on OF && !CPU_BIG_ENDIAN
368 select EFI_PARAMS_FROM_FDT
369 select EFI_RUNTIME_WRAPPERS
374 This option provides support for runtime services provided
375 by UEFI firmware (such as non-volatile variables, realtime
376 clock, and platform reset). A UEFI stub is also provided to
377 allow the kernel to be booted as an EFI application. This
378 is only useful on systems that have UEFI firmware.
382 menu "Userspace binary formats"
384 source "fs/Kconfig.binfmt"
387 bool "Kernel support for 32-bit EL0"
388 depends on !ARM64_64K_PAGES
389 select COMPAT_BINFMT_ELF
391 select OLD_SIGSUSPEND3
392 select COMPAT_OLD_SIGACTION
394 This option enables support for a 32-bit EL0 running under a 64-bit
395 kernel at EL1. AArch32-specific components such as system calls,
396 the user helper functions, VFP support and the ptrace interface are
397 handled appropriately by the kernel.
399 If you want to execute 32-bit userspace applications, say Y.
401 config SYSVIPC_COMPAT
403 depends on COMPAT && SYSVIPC
407 menu "Power management options"
409 source "kernel/power/Kconfig"
411 config ARCH_SUSPEND_POSSIBLE
414 config ARM64_CPU_SUSPEND
419 menu "CPU Power Management"
421 source "drivers/cpuidle/Kconfig"
423 source "drivers/cpufreq/Kconfig"
429 source "drivers/Kconfig"
431 source "drivers/firmware/Kconfig"
435 source "arch/arm64/kvm/Kconfig"
437 source "arch/arm64/Kconfig.debug"
439 source "security/Kconfig"
441 source "crypto/Kconfig"
443 source "arch/arm64/crypto/Kconfig"