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 HAVE_GENERIC_RCU_GUP
117 config ARCH_DMA_ADDR_T_64BIT
120 config NEED_DMA_MAP_STATE
123 config NEED_SG_DMA_LENGTH
132 config KERNEL_MODE_NEON
135 config FIX_EARLYCON_MEM
138 source "init/Kconfig"
140 source "kernel/Kconfig.freezer"
142 menu "Platform selection"
145 bool "Cavium Inc. Thunder SoC Family"
147 This enables support for Cavium's Thunder Family of SoCs.
150 bool "ARMv8 software model (Versatile Express)"
151 select ARCH_REQUIRE_GPIOLIB
152 select COMMON_CLK_VERSATILE
153 select POWER_RESET_VEXPRESS
154 select VEXPRESS_CONFIG
156 This enables support for the ARMv8 software model (Versatile
160 bool "AppliedMicro X-Gene SOC Family"
162 This enables support for AppliedMicro X-Gene SOC Family
173 menu "Kernel Features"
177 default ARM64_4K_PAGES
179 Page size (translation granule) configuration.
181 config ARM64_4K_PAGES
184 This feature enables 4KB pages support.
186 config ARM64_64K_PAGES
189 This feature enables 64KB pages support (4KB by default)
190 allowing only two levels of page tables and faster TLB
191 look-up. AArch32 emulation is not available when this feature
197 prompt "Virtual address space size"
198 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
199 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
201 Allows choosing one of multiple possible virtual address
202 space sizes. The level of translation table is determined by
203 a combination of page size and virtual address space size.
205 config ARM64_VA_BITS_39
207 depends on ARM64_4K_PAGES
209 config ARM64_VA_BITS_42
211 depends on ARM64_64K_PAGES
213 config ARM64_VA_BITS_48
221 default 39 if ARM64_VA_BITS_39
222 default 42 if ARM64_VA_BITS_42
223 default 48 if ARM64_VA_BITS_48
225 config ARM64_PGTABLE_LEVELS
227 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
228 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
229 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
230 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
232 config CPU_BIG_ENDIAN
233 bool "Build big-endian kernel"
235 Say Y if you plan on running a kernel in big-endian mode.
238 bool "Symmetric Multi-Processing"
240 This enables support for systems with more than one CPU. If
241 you say N here, the kernel will run on single and
242 multiprocessor machines, but will use only one CPU of a
243 multiprocessor machine. If you say Y here, the kernel will run
244 on many, but not all, single processor machines. On a single
245 processor machine, the kernel will run faster if you say N
248 If you don't know what to do here, say N.
251 bool "Multi-core scheduler support"
254 Multi-core scheduler support improves the CPU scheduler's decision
255 making when dealing with multi-core CPU chips at a cost of slightly
256 increased overhead in some places. If unsure say N here.
259 bool "SMT scheduler support"
262 Improves the CPU scheduler's decision making when dealing with
263 MultiThreading at a cost of slightly increased overhead in some
264 places. If unsure say N here.
267 int "Maximum number of CPUs (2-64)"
270 # These have to remain sorted largest to smallest
274 bool "Support for hot-pluggable CPUs"
277 Say Y here to experiment with turning CPUs off and on. CPUs
278 can be controlled through /sys/devices/system/cpu.
280 source kernel/Kconfig.preempt
286 config ARCH_HAS_HOLES_MEMORYMODEL
287 def_bool y if SPARSEMEM
289 config ARCH_SPARSEMEM_ENABLE
291 select SPARSEMEM_VMEMMAP_ENABLE
293 config ARCH_SPARSEMEM_DEFAULT
294 def_bool ARCH_SPARSEMEM_ENABLE
296 config ARCH_SELECT_MEMORY_MODEL
297 def_bool ARCH_SPARSEMEM_ENABLE
299 config HAVE_ARCH_PFN_VALID
300 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
302 config HW_PERF_EVENTS
303 bool "Enable hardware performance counter support for perf events"
304 depends on PERF_EVENTS
307 Enable hardware performance counter support for perf events. If
308 disabled, perf events will use software events only.
310 config SYS_SUPPORTS_HUGETLBFS
313 config ARCH_WANT_GENERAL_HUGETLB
316 config ARCH_WANT_HUGE_PMD_SHARE
317 def_bool y if !ARM64_64K_PAGES
319 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
322 config ARCH_HAS_CACHE_LINE_SIZE
332 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
333 depends on ARM64 && OF
336 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
338 config FORCE_MAX_ZONEORDER
340 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
348 string "Default kernel command string"
351 Provide a set of default command-line options at build time by
352 entering them here. As a minimum, you should specify the the
353 root device (e.g. root=/dev/nfs).
356 bool "Always use the default kernel command string"
358 Always use the default kernel command string, even if the boot
359 loader passes other arguments to the kernel.
360 This is useful if you cannot or don't want to change the
361 command-line options your boot loader passes to the kernel.
367 bool "UEFI runtime support"
368 depends on OF && !CPU_BIG_ENDIAN
371 select EFI_PARAMS_FROM_FDT
372 select EFI_RUNTIME_WRAPPERS
377 This option provides support for runtime services provided
378 by UEFI firmware (such as non-volatile variables, realtime
379 clock, and platform reset). A UEFI stub is also provided to
380 allow the kernel to be booted as an EFI application. This
381 is only useful on systems that have UEFI firmware.
385 menu "Userspace binary formats"
387 source "fs/Kconfig.binfmt"
390 bool "Kernel support for 32-bit EL0"
391 depends on !ARM64_64K_PAGES
392 select COMPAT_BINFMT_ELF
394 select OLD_SIGSUSPEND3
395 select COMPAT_OLD_SIGACTION
397 This option enables support for a 32-bit EL0 running under a 64-bit
398 kernel at EL1. AArch32-specific components such as system calls,
399 the user helper functions, VFP support and the ptrace interface are
400 handled appropriately by the kernel.
402 If you want to execute 32-bit userspace applications, say Y.
404 config SYSVIPC_COMPAT
406 depends on COMPAT && SYSVIPC
410 menu "Power management options"
412 source "kernel/power/Kconfig"
414 config ARCH_SUSPEND_POSSIBLE
417 config ARM64_CPU_SUSPEND
422 menu "CPU Power Management"
424 source "drivers/cpuidle/Kconfig"
426 source "drivers/cpufreq/Kconfig"
432 source "drivers/Kconfig"
434 source "drivers/firmware/Kconfig"
438 source "arch/arm64/kvm/Kconfig"
440 source "arch/arm64/Kconfig.debug"
442 source "security/Kconfig"
444 source "crypto/Kconfig"
446 source "arch/arm64/crypto/Kconfig"