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 "ARMv8 software model (Versatile Express)"
139 select ARCH_REQUIRE_GPIOLIB
140 select COMMON_CLK_VERSATILE
141 select POWER_RESET_VEXPRESS
142 select VEXPRESS_CONFIG
144 This enables support for the ARMv8 software model (Versatile
148 bool "AppliedMicro X-Gene SOC Family"
150 This enables support for AppliedMicro X-Gene SOC Family
161 menu "Kernel Features"
165 default ARM64_4K_PAGES
167 Page size (translation granule) configuration.
169 config ARM64_4K_PAGES
172 This feature enables 4KB pages support.
174 config ARM64_64K_PAGES
177 This feature enables 64KB pages support (4KB by default)
178 allowing only two levels of page tables and faster TLB
179 look-up. AArch32 emulation is not available when this feature
185 prompt "Virtual address space size"
186 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
187 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
189 Allows choosing one of multiple possible virtual address
190 space sizes. The level of translation table is determined by
191 a combination of page size and virtual address space size.
193 config ARM64_VA_BITS_39
195 depends on ARM64_4K_PAGES
197 config ARM64_VA_BITS_42
199 depends on ARM64_64K_PAGES
201 config ARM64_VA_BITS_48
209 default 39 if ARM64_VA_BITS_39
210 default 42 if ARM64_VA_BITS_42
211 default 48 if ARM64_VA_BITS_48
213 config ARM64_PGTABLE_LEVELS
215 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
216 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
217 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
218 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
220 config CPU_BIG_ENDIAN
221 bool "Build big-endian kernel"
223 Say Y if you plan on running a kernel in big-endian mode.
226 bool "Symmetric Multi-Processing"
228 This enables support for systems with more than one CPU. If
229 you say N here, the kernel will run on single and
230 multiprocessor machines, but will use only one CPU of a
231 multiprocessor machine. If you say Y here, the kernel will run
232 on many, but not all, single processor machines. On a single
233 processor machine, the kernel will run faster if you say N
236 If you don't know what to do here, say N.
239 bool "Multi-core scheduler support"
242 Multi-core scheduler support improves the CPU scheduler's decision
243 making when dealing with multi-core CPU chips at a cost of slightly
244 increased overhead in some places. If unsure say N here.
247 bool "SMT scheduler support"
250 Improves the CPU scheduler's decision making when dealing with
251 MultiThreading at a cost of slightly increased overhead in some
252 places. If unsure say N here.
255 int "Maximum number of CPUs (2-32)"
258 # These have to remain sorted largest to smallest
262 bool "Support for hot-pluggable CPUs"
265 Say Y here to experiment with turning CPUs off and on. CPUs
266 can be controlled through /sys/devices/system/cpu.
268 source kernel/Kconfig.preempt
274 config ARCH_HAS_HOLES_MEMORYMODEL
275 def_bool y if SPARSEMEM
277 config ARCH_SPARSEMEM_ENABLE
279 select SPARSEMEM_VMEMMAP_ENABLE
281 config ARCH_SPARSEMEM_DEFAULT
282 def_bool ARCH_SPARSEMEM_ENABLE
284 config ARCH_SELECT_MEMORY_MODEL
285 def_bool ARCH_SPARSEMEM_ENABLE
287 config HAVE_ARCH_PFN_VALID
288 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
290 config HW_PERF_EVENTS
291 bool "Enable hardware performance counter support for perf events"
292 depends on PERF_EVENTS
295 Enable hardware performance counter support for perf events. If
296 disabled, perf events will use software events only.
298 config SYS_SUPPORTS_HUGETLBFS
301 config ARCH_WANT_GENERAL_HUGETLB
304 config ARCH_WANT_HUGE_PMD_SHARE
305 def_bool y if !ARM64_64K_PAGES
307 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
310 config ARCH_HAS_CACHE_LINE_SIZE
320 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
321 depends on ARM64 && OF
324 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
326 config FORCE_MAX_ZONEORDER
328 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
336 string "Default kernel command string"
339 Provide a set of default command-line options at build time by
340 entering them here. As a minimum, you should specify the the
341 root device (e.g. root=/dev/nfs).
344 bool "Always use the default kernel command string"
346 Always use the default kernel command string, even if the boot
347 loader passes other arguments to the kernel.
348 This is useful if you cannot or don't want to change the
349 command-line options your boot loader passes to the kernel.
355 bool "UEFI runtime support"
356 depends on OF && !CPU_BIG_ENDIAN
359 select EFI_PARAMS_FROM_FDT
360 select EFI_RUNTIME_WRAPPERS
365 This option provides support for runtime services provided
366 by UEFI firmware (such as non-volatile variables, realtime
367 clock, and platform reset). A UEFI stub is also provided to
368 allow the kernel to be booted as an EFI application. This
369 is only useful on systems that have UEFI firmware.
373 menu "Userspace binary formats"
375 source "fs/Kconfig.binfmt"
378 bool "Kernel support for 32-bit EL0"
379 depends on !ARM64_64K_PAGES
380 select COMPAT_BINFMT_ELF
382 select OLD_SIGSUSPEND3
383 select COMPAT_OLD_SIGACTION
385 This option enables support for a 32-bit EL0 running under a 64-bit
386 kernel at EL1. AArch32-specific components such as system calls,
387 the user helper functions, VFP support and the ptrace interface are
388 handled appropriately by the kernel.
390 If you want to execute 32-bit userspace applications, say Y.
392 config SYSVIPC_COMPAT
394 depends on COMPAT && SYSVIPC
398 menu "Power management options"
400 source "kernel/power/Kconfig"
402 config ARCH_SUSPEND_POSSIBLE
405 config ARM64_CPU_SUSPEND
410 menu "CPU Power Management"
412 source "drivers/cpuidle/Kconfig"
414 source "drivers/cpufreq/Kconfig"
420 source "drivers/Kconfig"
422 source "drivers/firmware/Kconfig"
426 source "arch/arm64/kvm/Kconfig"
428 source "arch/arm64/Kconfig.debug"
430 source "security/Kconfig"
432 source "crypto/Kconfig"
434 source "arch/arm64/crypto/Kconfig"