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_CLOCKEVENTS
22 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
23 select GENERIC_CPU_AUTOPROBE
24 select GENERIC_EARLY_IOREMAP
26 select GENERIC_IRQ_PROBE
27 select GENERIC_IRQ_SHOW
28 select GENERIC_SCHED_CLOCK
29 select GENERIC_SMP_IDLE_THREAD
30 select GENERIC_STRNCPY_FROM_USER
31 select GENERIC_STRNLEN_USER
32 select GENERIC_TIME_VSYSCALL
33 select HARDIRQS_SW_RESEND
34 select HAVE_ARCH_AUDITSYSCALL
35 select HAVE_ARCH_JUMP_LABEL
37 select HAVE_ARCH_TRACEHOOK
38 select HAVE_C_RECORDMCOUNT
39 select HAVE_CC_STACKPROTECTOR
40 select HAVE_DEBUG_BUGVERBOSE
41 select HAVE_DEBUG_KMEMLEAK
42 select HAVE_DMA_API_DEBUG
44 select HAVE_DMA_CONTIGUOUS
45 select HAVE_DYNAMIC_FTRACE
46 select HAVE_EFFICIENT_UNALIGNED_ACCESS
47 select HAVE_FTRACE_MCOUNT_RECORD
48 select HAVE_FUNCTION_TRACER
49 select HAVE_FUNCTION_GRAPH_TRACER
50 select HAVE_GENERIC_DMA_COHERENT
51 select HAVE_HW_BREAKPOINT if PERF_EVENTS
53 select HAVE_PATA_PLATFORM
54 select HAVE_PERF_EVENTS
56 select HAVE_PERF_USER_STACK_DUMP
57 select HAVE_SYSCALL_TRACEPOINTS
59 select MODULES_USE_ELF_RELA
62 select OF_EARLY_FLATTREE
63 select OF_RESERVED_MEM
64 select PERF_USE_VMALLOC
69 select SYSCTL_EXCEPTION_TRACE
70 select HAVE_CONTEXT_TRACKING
72 ARM 64-bit (AArch64) Linux support.
77 config ARCH_PHYS_ADDR_T_64BIT
86 config STACKTRACE_SUPPORT
89 config LOCKDEP_SUPPORT
92 config TRACE_IRQFLAGS_SUPPORT
95 config RWSEM_XCHGADD_ALGORITHM
98 config GENERIC_HWEIGHT
104 config GENERIC_CALIBRATE_DELAY
110 config ARCH_DMA_ADDR_T_64BIT
113 config NEED_DMA_MAP_STATE
116 config NEED_SG_DMA_LENGTH
125 config KERNEL_MODE_NEON
128 config FIX_EARLYCON_MEM
131 source "init/Kconfig"
133 source "kernel/Kconfig.freezer"
135 menu "Platform selection"
138 bool "Cavium Inc. Thunder SoC Family"
140 This enables support for Cavium's Thunder Family of SoCs.
143 bool "ARMv8 software model (Versatile Express)"
144 select ARCH_REQUIRE_GPIOLIB
145 select COMMON_CLK_VERSATILE
146 select POWER_RESET_VEXPRESS
147 select VEXPRESS_CONFIG
149 This enables support for the ARMv8 software model (Versatile
153 bool "AppliedMicro X-Gene SOC Family"
155 This enables support for AppliedMicro X-Gene SOC Family
166 menu "Kernel Features"
170 default ARM64_4K_PAGES
172 Page size (translation granule) configuration.
174 config ARM64_4K_PAGES
177 This feature enables 4KB pages support.
179 config ARM64_64K_PAGES
182 This feature enables 64KB pages support (4KB by default)
183 allowing only two levels of page tables and faster TLB
184 look-up. AArch32 emulation is not available when this feature
190 prompt "Virtual address space size"
191 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
192 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
194 Allows choosing one of multiple possible virtual address
195 space sizes. The level of translation table is determined by
196 a combination of page size and virtual address space size.
198 config ARM64_VA_BITS_39
200 depends on ARM64_4K_PAGES
202 config ARM64_VA_BITS_42
204 depends on ARM64_64K_PAGES
206 config ARM64_VA_BITS_48
214 default 39 if ARM64_VA_BITS_39
215 default 42 if ARM64_VA_BITS_42
216 default 48 if ARM64_VA_BITS_48
218 config ARM64_PGTABLE_LEVELS
220 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
221 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
222 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
223 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
225 config CPU_BIG_ENDIAN
226 bool "Build big-endian kernel"
228 Say Y if you plan on running a kernel in big-endian mode.
231 bool "Symmetric Multi-Processing"
233 This enables support for systems with more than one CPU. If
234 you say N here, the kernel will run on single and
235 multiprocessor machines, but will use only one CPU of a
236 multiprocessor machine. If you say Y here, the kernel will run
237 on many, but not all, single processor machines. On a single
238 processor machine, the kernel will run faster if you say N
241 If you don't know what to do here, say N.
244 bool "Multi-core scheduler support"
247 Multi-core scheduler support improves the CPU scheduler's decision
248 making when dealing with multi-core CPU chips at a cost of slightly
249 increased overhead in some places. If unsure say N here.
252 bool "SMT scheduler support"
255 Improves the CPU scheduler's decision making when dealing with
256 MultiThreading at a cost of slightly increased overhead in some
257 places. If unsure say N here.
260 int "Maximum number of CPUs (2-32)"
263 # These have to remain sorted largest to smallest
267 bool "Support for hot-pluggable CPUs"
270 Say Y here to experiment with turning CPUs off and on. CPUs
271 can be controlled through /sys/devices/system/cpu.
273 source kernel/Kconfig.preempt
279 config ARCH_HAS_HOLES_MEMORYMODEL
280 def_bool y if SPARSEMEM
282 config ARCH_SPARSEMEM_ENABLE
284 select SPARSEMEM_VMEMMAP_ENABLE
286 config ARCH_SPARSEMEM_DEFAULT
287 def_bool ARCH_SPARSEMEM_ENABLE
289 config ARCH_SELECT_MEMORY_MODEL
290 def_bool ARCH_SPARSEMEM_ENABLE
292 config HAVE_ARCH_PFN_VALID
293 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
295 config HW_PERF_EVENTS
296 bool "Enable hardware performance counter support for perf events"
297 depends on PERF_EVENTS
300 Enable hardware performance counter support for perf events. If
301 disabled, perf events will use software events only.
303 config SYS_SUPPORTS_HUGETLBFS
306 config ARCH_WANT_GENERAL_HUGETLB
309 config ARCH_WANT_HUGE_PMD_SHARE
310 def_bool y if !ARM64_64K_PAGES
312 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
315 config ARCH_HAS_CACHE_LINE_SIZE
325 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
326 depends on ARM64 && OF
329 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
331 config FORCE_MAX_ZONEORDER
333 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
341 string "Default kernel command string"
344 Provide a set of default command-line options at build time by
345 entering them here. As a minimum, you should specify the the
346 root device (e.g. root=/dev/nfs).
349 bool "Always use the default kernel command string"
351 Always use the default kernel command string, even if the boot
352 loader passes other arguments to the kernel.
353 This is useful if you cannot or don't want to change the
354 command-line options your boot loader passes to the kernel.
360 bool "UEFI runtime support"
361 depends on OF && !CPU_BIG_ENDIAN
364 select EFI_PARAMS_FROM_FDT
365 select EFI_RUNTIME_WRAPPERS
370 This option provides support for runtime services provided
371 by UEFI firmware (such as non-volatile variables, realtime
372 clock, and platform reset). A UEFI stub is also provided to
373 allow the kernel to be booted as an EFI application. This
374 is only useful on systems that have UEFI firmware.
378 menu "Userspace binary formats"
380 source "fs/Kconfig.binfmt"
383 bool "Kernel support for 32-bit EL0"
384 depends on !ARM64_64K_PAGES
385 select COMPAT_BINFMT_ELF
387 select OLD_SIGSUSPEND3
388 select COMPAT_OLD_SIGACTION
390 This option enables support for a 32-bit EL0 running under a 64-bit
391 kernel at EL1. AArch32-specific components such as system calls,
392 the user helper functions, VFP support and the ptrace interface are
393 handled appropriately by the kernel.
395 If you want to execute 32-bit userspace applications, say Y.
397 config SYSVIPC_COMPAT
399 depends on COMPAT && SYSVIPC
403 menu "Power management options"
405 source "kernel/power/Kconfig"
407 config ARCH_SUSPEND_POSSIBLE
410 config ARM64_CPU_SUSPEND
415 menu "CPU Power Management"
417 source "drivers/cpuidle/Kconfig"
419 source "drivers/cpufreq/Kconfig"
425 source "drivers/Kconfig"
427 source "drivers/firmware/Kconfig"
431 source "arch/arm64/kvm/Kconfig"
433 source "arch/arm64/Kconfig.debug"
435 source "security/Kconfig"
437 source "crypto/Kconfig"
439 source "arch/arm64/crypto/Kconfig"