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
39 select HAVE_C_RECORDMCOUNT
40 select HAVE_CC_STACKPROTECTOR
41 select HAVE_DEBUG_BUGVERBOSE
42 select HAVE_DEBUG_KMEMLEAK
43 select HAVE_DMA_API_DEBUG
45 select HAVE_DMA_CONTIGUOUS
46 select HAVE_DYNAMIC_FTRACE
47 select HAVE_EFFICIENT_UNALIGNED_ACCESS
48 select HAVE_FTRACE_MCOUNT_RECORD
49 select HAVE_FUNCTION_TRACER
50 select HAVE_FUNCTION_GRAPH_TRACER
51 select HAVE_GENERIC_DMA_COHERENT
52 select HAVE_HW_BREAKPOINT if PERF_EVENTS
54 select HAVE_PATA_PLATFORM
55 select HAVE_PERF_EVENTS
57 select HAVE_PERF_USER_STACK_DUMP
58 select HAVE_SYSCALL_TRACEPOINTS
60 select MODULES_USE_ELF_RELA
63 select OF_EARLY_FLATTREE
64 select OF_RESERVED_MEM
65 select PERF_USE_VMALLOC
70 select SYSCTL_EXCEPTION_TRACE
71 select HAVE_CONTEXT_TRACKING
73 ARM 64-bit (AArch64) Linux support.
78 config ARCH_PHYS_ADDR_T_64BIT
87 config STACKTRACE_SUPPORT
90 config LOCKDEP_SUPPORT
93 config TRACE_IRQFLAGS_SUPPORT
96 config RWSEM_XCHGADD_ALGORITHM
99 config GENERIC_HWEIGHT
105 config GENERIC_CALIBRATE_DELAY
111 config ARCH_DMA_ADDR_T_64BIT
114 config NEED_DMA_MAP_STATE
117 config NEED_SG_DMA_LENGTH
126 config KERNEL_MODE_NEON
129 config FIX_EARLYCON_MEM
132 source "init/Kconfig"
134 source "kernel/Kconfig.freezer"
136 menu "Platform selection"
139 bool "ARMv8 software model (Versatile Express)"
140 select ARCH_REQUIRE_GPIOLIB
141 select COMMON_CLK_VERSATILE
142 select POWER_RESET_VEXPRESS
143 select VEXPRESS_CONFIG
145 This enables support for the ARMv8 software model (Versatile
149 bool "AppliedMicro X-Gene SOC Family"
151 This enables support for AppliedMicro X-Gene SOC Family
162 menu "Kernel Features"
166 default ARM64_4K_PAGES
168 Page size (translation granule) configuration.
170 config ARM64_4K_PAGES
173 This feature enables 4KB pages support.
175 config ARM64_64K_PAGES
178 This feature enables 64KB pages support (4KB by default)
179 allowing only two levels of page tables and faster TLB
180 look-up. AArch32 emulation is not available when this feature
186 prompt "Virtual address space size"
187 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
188 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
190 Allows choosing one of multiple possible virtual address
191 space sizes. The level of translation table is determined by
192 a combination of page size and virtual address space size.
194 config ARM64_VA_BITS_39
196 depends on ARM64_4K_PAGES
198 config ARM64_VA_BITS_42
200 depends on ARM64_64K_PAGES
202 config ARM64_VA_BITS_48
210 default 39 if ARM64_VA_BITS_39
211 default 42 if ARM64_VA_BITS_42
212 default 48 if ARM64_VA_BITS_48
214 config ARM64_PGTABLE_LEVELS
216 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
217 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
218 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
219 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
221 config CPU_BIG_ENDIAN
222 bool "Build big-endian kernel"
224 Say Y if you plan on running a kernel in big-endian mode.
227 bool "Symmetric Multi-Processing"
229 This enables support for systems with more than one CPU. If
230 you say N here, the kernel will run on single and
231 multiprocessor machines, but will use only one CPU of a
232 multiprocessor machine. If you say Y here, the kernel will run
233 on many, but not all, single processor machines. On a single
234 processor machine, the kernel will run faster if you say N
237 If you don't know what to do here, say N.
240 bool "Multi-core scheduler support"
243 Multi-core scheduler support improves the CPU scheduler's decision
244 making when dealing with multi-core CPU chips at a cost of slightly
245 increased overhead in some places. If unsure say N here.
248 bool "SMT scheduler support"
251 Improves the CPU scheduler's decision making when dealing with
252 MultiThreading at a cost of slightly increased overhead in some
253 places. If unsure say N here.
256 int "Maximum number of CPUs (2-32)"
259 # These have to remain sorted largest to smallest
263 bool "Support for hot-pluggable CPUs"
266 Say Y here to experiment with turning CPUs off and on. CPUs
267 can be controlled through /sys/devices/system/cpu.
269 source kernel/Kconfig.preempt
275 config ARCH_HAS_HOLES_MEMORYMODEL
276 def_bool y if SPARSEMEM
278 config ARCH_SPARSEMEM_ENABLE
280 select SPARSEMEM_VMEMMAP_ENABLE
282 config ARCH_SPARSEMEM_DEFAULT
283 def_bool ARCH_SPARSEMEM_ENABLE
285 config ARCH_SELECT_MEMORY_MODEL
286 def_bool ARCH_SPARSEMEM_ENABLE
288 config HAVE_ARCH_PFN_VALID
289 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
291 config HW_PERF_EVENTS
292 bool "Enable hardware performance counter support for perf events"
293 depends on PERF_EVENTS
296 Enable hardware performance counter support for perf events. If
297 disabled, perf events will use software events only.
299 config SYS_SUPPORTS_HUGETLBFS
302 config ARCH_WANT_GENERAL_HUGETLB
305 config ARCH_WANT_HUGE_PMD_SHARE
306 def_bool y if !ARM64_64K_PAGES
308 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
311 config ARCH_HAS_CACHE_LINE_SIZE
321 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
322 depends on ARM64 && OF
325 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
327 config FORCE_MAX_ZONEORDER
329 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
337 string "Default kernel command string"
340 Provide a set of default command-line options at build time by
341 entering them here. As a minimum, you should specify the the
342 root device (e.g. root=/dev/nfs).
345 bool "Always use the default kernel command string"
347 Always use the default kernel command string, even if the boot
348 loader passes other arguments to the kernel.
349 This is useful if you cannot or don't want to change the
350 command-line options your boot loader passes to the kernel.
356 bool "UEFI runtime support"
357 depends on OF && !CPU_BIG_ENDIAN
360 select EFI_PARAMS_FROM_FDT
361 select EFI_RUNTIME_WRAPPERS
366 This option provides support for runtime services provided
367 by UEFI firmware (such as non-volatile variables, realtime
368 clock, and platform reset). A UEFI stub is also provided to
369 allow the kernel to be booted as an EFI application. This
370 is only useful on systems that have UEFI firmware.
374 menu "Userspace binary formats"
376 source "fs/Kconfig.binfmt"
379 bool "Kernel support for 32-bit EL0"
380 depends on !ARM64_64K_PAGES
381 select COMPAT_BINFMT_ELF
383 select OLD_SIGSUSPEND3
384 select COMPAT_OLD_SIGACTION
386 This option enables support for a 32-bit EL0 running under a 64-bit
387 kernel at EL1. AArch32-specific components such as system calls,
388 the user helper functions, VFP support and the ptrace interface are
389 handled appropriately by the kernel.
391 If you want to execute 32-bit userspace applications, say Y.
393 config SYSVIPC_COMPAT
395 depends on COMPAT && SYSVIPC
399 menu "Power management options"
401 source "kernel/power/Kconfig"
403 config ARCH_SUSPEND_POSSIBLE
406 config ARM64_CPU_SUSPEND
411 menu "CPU Power Management"
413 source "drivers/cpuidle/Kconfig"
415 source "drivers/cpufreq/Kconfig"
421 source "drivers/Kconfig"
423 source "drivers/firmware/Kconfig"
427 source "arch/arm64/kvm/Kconfig"
429 source "arch/arm64/Kconfig.debug"
431 source "security/Kconfig"
433 source "crypto/Kconfig"
435 source "arch/arm64/crypto/Kconfig"