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
174 This feature enables support for PCI bus system. If you say Y
175 here, the kernel will include drivers and infrastructure code
176 to support PCI bus devices.
181 config PCI_DOMAINS_GENERIC
187 source "drivers/pci/Kconfig"
188 source "drivers/pci/pcie/Kconfig"
189 source "drivers/pci/hotplug/Kconfig"
193 menu "Kernel Features"
197 default ARM64_4K_PAGES
199 Page size (translation granule) configuration.
201 config ARM64_4K_PAGES
204 This feature enables 4KB pages support.
206 config ARM64_64K_PAGES
209 This feature enables 64KB pages support (4KB by default)
210 allowing only two levels of page tables and faster TLB
211 look-up. AArch32 emulation is not available when this feature
217 prompt "Virtual address space size"
218 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
219 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
221 Allows choosing one of multiple possible virtual address
222 space sizes. The level of translation table is determined by
223 a combination of page size and virtual address space size.
225 config ARM64_VA_BITS_39
227 depends on ARM64_4K_PAGES
229 config ARM64_VA_BITS_42
231 depends on ARM64_64K_PAGES
233 config ARM64_VA_BITS_48
241 default 39 if ARM64_VA_BITS_39
242 default 42 if ARM64_VA_BITS_42
243 default 48 if ARM64_VA_BITS_48
245 config ARM64_PGTABLE_LEVELS
247 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
248 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
249 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
250 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
252 config CPU_BIG_ENDIAN
253 bool "Build big-endian kernel"
255 Say Y if you plan on running a kernel in big-endian mode.
258 bool "Symmetric Multi-Processing"
260 This enables support for systems with more than one CPU. If
261 you say N here, the kernel will run on single and
262 multiprocessor machines, but will use only one CPU of a
263 multiprocessor machine. If you say Y here, the kernel will run
264 on many, but not all, single processor machines. On a single
265 processor machine, the kernel will run faster if you say N
268 If you don't know what to do here, say N.
271 bool "Multi-core scheduler support"
274 Multi-core scheduler support improves the CPU scheduler's decision
275 making when dealing with multi-core CPU chips at a cost of slightly
276 increased overhead in some places. If unsure say N here.
279 bool "SMT scheduler support"
282 Improves the CPU scheduler's decision making when dealing with
283 MultiThreading at a cost of slightly increased overhead in some
284 places. If unsure say N here.
287 int "Maximum number of CPUs (2-64)"
290 # These have to remain sorted largest to smallest
294 bool "Support for hot-pluggable CPUs"
297 Say Y here to experiment with turning CPUs off and on. CPUs
298 can be controlled through /sys/devices/system/cpu.
300 source kernel/Kconfig.preempt
306 config ARCH_HAS_HOLES_MEMORYMODEL
307 def_bool y if SPARSEMEM
309 config ARCH_SPARSEMEM_ENABLE
311 select SPARSEMEM_VMEMMAP_ENABLE
313 config ARCH_SPARSEMEM_DEFAULT
314 def_bool ARCH_SPARSEMEM_ENABLE
316 config ARCH_SELECT_MEMORY_MODEL
317 def_bool ARCH_SPARSEMEM_ENABLE
319 config HAVE_ARCH_PFN_VALID
320 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
322 config HW_PERF_EVENTS
323 bool "Enable hardware performance counter support for perf events"
324 depends on PERF_EVENTS
327 Enable hardware performance counter support for perf events. If
328 disabled, perf events will use software events only.
330 config SYS_SUPPORTS_HUGETLBFS
333 config ARCH_WANT_GENERAL_HUGETLB
336 config ARCH_WANT_HUGE_PMD_SHARE
337 def_bool y if !ARM64_64K_PAGES
339 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
342 config ARCH_HAS_CACHE_LINE_SIZE
352 bool "Xen guest support on ARM64"
353 depends on ARM64 && OF
356 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
358 config FORCE_MAX_ZONEORDER
360 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
368 string "Default kernel command string"
371 Provide a set of default command-line options at build time by
372 entering them here. As a minimum, you should specify the the
373 root device (e.g. root=/dev/nfs).
376 bool "Always use the default kernel command string"
378 Always use the default kernel command string, even if the boot
379 loader passes other arguments to the kernel.
380 This is useful if you cannot or don't want to change the
381 command-line options your boot loader passes to the kernel.
387 bool "UEFI runtime support"
388 depends on OF && !CPU_BIG_ENDIAN
391 select EFI_PARAMS_FROM_FDT
392 select EFI_RUNTIME_WRAPPERS
397 This option provides support for runtime services provided
398 by UEFI firmware (such as non-volatile variables, realtime
399 clock, and platform reset). A UEFI stub is also provided to
400 allow the kernel to be booted as an EFI application. This
401 is only useful on systems that have UEFI firmware.
405 menu "Userspace binary formats"
407 source "fs/Kconfig.binfmt"
410 bool "Kernel support for 32-bit EL0"
411 depends on !ARM64_64K_PAGES
412 select COMPAT_BINFMT_ELF
414 select OLD_SIGSUSPEND3
415 select COMPAT_OLD_SIGACTION
417 This option enables support for a 32-bit EL0 running under a 64-bit
418 kernel at EL1. AArch32-specific components such as system calls,
419 the user helper functions, VFP support and the ptrace interface are
420 handled appropriately by the kernel.
422 If you want to execute 32-bit userspace applications, say Y.
424 config SYSVIPC_COMPAT
426 depends on COMPAT && SYSVIPC
430 menu "Power management options"
432 source "kernel/power/Kconfig"
434 config ARCH_SUSPEND_POSSIBLE
437 config ARM64_CPU_SUSPEND
442 menu "CPU Power Management"
444 source "drivers/cpuidle/Kconfig"
446 source "drivers/cpufreq/Kconfig"
452 source "drivers/Kconfig"
454 source "drivers/firmware/Kconfig"
458 source "arch/arm64/kvm/Kconfig"
460 source "arch/arm64/Kconfig.debug"
462 source "security/Kconfig"
464 source "crypto/Kconfig"
466 source "arch/arm64/crypto/Kconfig"