3 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
4 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
5 select ARCH_HAS_SG_CHAIN
6 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
7 select ARCH_USE_CMPXCHG_LOCKREF
8 select ARCH_SUPPORTS_ATOMIC_RMW
9 select ARCH_WANT_OPTIONAL_GPIOLIB
10 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
11 select ARCH_WANT_FRAME_POINTERS
15 select AUDIT_ARCH_COMPAT_GENERIC
17 select BUILDTIME_EXTABLE_SORT
18 select CLONE_BACKWARDS
20 select CPU_PM if (SUSPEND || CPU_IDLE)
21 select DCACHE_WORD_ACCESS
22 select GENERIC_ALLOCATOR
23 select GENERIC_CLOCKEVENTS
24 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
25 select GENERIC_CPU_AUTOPROBE
26 select GENERIC_EARLY_IOREMAP
28 select GENERIC_IRQ_PROBE
29 select GENERIC_IRQ_SHOW
30 select GENERIC_SCHED_CLOCK
31 select GENERIC_SMP_IDLE_THREAD
32 select GENERIC_STRNCPY_FROM_USER
33 select GENERIC_STRNLEN_USER
34 select GENERIC_TIME_VSYSCALL
35 select HANDLE_DOMAIN_IRQ
36 select HARDIRQS_SW_RESEND
37 select HAVE_ARCH_AUDITSYSCALL
38 select HAVE_ARCH_JUMP_LABEL
40 select HAVE_ARCH_TRACEHOOK
42 select HAVE_C_RECORDMCOUNT
43 select HAVE_CC_STACKPROTECTOR
44 select HAVE_DEBUG_BUGVERBOSE
45 select HAVE_DEBUG_KMEMLEAK
46 select HAVE_DMA_API_DEBUG
48 select HAVE_DMA_CONTIGUOUS
49 select HAVE_DYNAMIC_FTRACE
50 select HAVE_EFFICIENT_UNALIGNED_ACCESS
51 select HAVE_FTRACE_MCOUNT_RECORD
52 select HAVE_FUNCTION_TRACER
53 select HAVE_FUNCTION_GRAPH_TRACER
54 select HAVE_GENERIC_DMA_COHERENT
55 select HAVE_HW_BREAKPOINT if PERF_EVENTS
57 select HAVE_PATA_PLATFORM
58 select HAVE_PERF_EVENTS
60 select HAVE_PERF_USER_STACK_DUMP
61 select HAVE_RCU_TABLE_FREE
62 select HAVE_SYSCALL_TRACEPOINTS
64 select MODULES_USE_ELF_RELA
67 select OF_EARLY_FLATTREE
68 select OF_RESERVED_MEM
69 select PERF_USE_VMALLOC
74 select SYSCTL_EXCEPTION_TRACE
75 select HAVE_CONTEXT_TRACKING
77 ARM 64-bit (AArch64) Linux support.
82 config ARCH_PHYS_ADDR_T_64BIT
91 config STACKTRACE_SUPPORT
94 config LOCKDEP_SUPPORT
97 config TRACE_IRQFLAGS_SUPPORT
100 config RWSEM_XCHGADD_ALGORITHM
103 config GENERIC_HWEIGHT
109 config GENERIC_CALIBRATE_DELAY
115 config HAVE_GENERIC_RCU_GUP
118 config ARCH_DMA_ADDR_T_64BIT
121 config NEED_DMA_MAP_STATE
124 config NEED_SG_DMA_LENGTH
133 config KERNEL_MODE_NEON
136 config FIX_EARLYCON_MEM
139 source "init/Kconfig"
141 source "kernel/Kconfig.freezer"
143 menu "Platform selection"
146 bool "Cavium Inc. Thunder SoC Family"
148 This enables support for Cavium's Thunder Family of SoCs.
151 bool "ARMv8 software model (Versatile Express)"
152 select ARCH_REQUIRE_GPIOLIB
153 select COMMON_CLK_VERSATILE
154 select POWER_RESET_VEXPRESS
155 select VEXPRESS_CONFIG
157 This enables support for the ARMv8 software model (Versatile
161 bool "AppliedMicro X-Gene SOC Family"
163 This enables support for AppliedMicro X-Gene SOC Family
175 This feature enables support for PCI bus system. If you say Y
176 here, the kernel will include drivers and infrastructure code
177 to support PCI bus devices.
182 config PCI_DOMAINS_GENERIC
188 source "drivers/pci/Kconfig"
189 source "drivers/pci/pcie/Kconfig"
190 source "drivers/pci/hotplug/Kconfig"
194 menu "Kernel Features"
198 default ARM64_4K_PAGES
200 Page size (translation granule) configuration.
202 config ARM64_4K_PAGES
205 This feature enables 4KB pages support.
207 config ARM64_64K_PAGES
210 This feature enables 64KB pages support (4KB by default)
211 allowing only two levels of page tables and faster TLB
212 look-up. AArch32 emulation is not available when this feature
218 prompt "Virtual address space size"
219 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
220 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
222 Allows choosing one of multiple possible virtual address
223 space sizes. The level of translation table is determined by
224 a combination of page size and virtual address space size.
226 config ARM64_VA_BITS_39
228 depends on ARM64_4K_PAGES
230 config ARM64_VA_BITS_42
232 depends on ARM64_64K_PAGES
234 config ARM64_VA_BITS_48
242 default 39 if ARM64_VA_BITS_39
243 default 42 if ARM64_VA_BITS_42
244 default 48 if ARM64_VA_BITS_48
246 config ARM64_PGTABLE_LEVELS
248 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
249 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
250 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
251 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
253 config CPU_BIG_ENDIAN
254 bool "Build big-endian kernel"
256 Say Y if you plan on running a kernel in big-endian mode.
259 bool "Symmetric Multi-Processing"
261 This enables support for systems with more than one CPU. If
262 you say N here, the kernel will run on single and
263 multiprocessor machines, but will use only one CPU of a
264 multiprocessor machine. If you say Y here, the kernel will run
265 on many, but not all, single processor machines. On a single
266 processor machine, the kernel will run faster if you say N
269 If you don't know what to do here, say N.
272 bool "Multi-core scheduler support"
275 Multi-core scheduler support improves the CPU scheduler's decision
276 making when dealing with multi-core CPU chips at a cost of slightly
277 increased overhead in some places. If unsure say N here.
280 bool "SMT scheduler support"
283 Improves the CPU scheduler's decision making when dealing with
284 MultiThreading at a cost of slightly increased overhead in some
285 places. If unsure say N here.
288 int "Maximum number of CPUs (2-64)"
291 # These have to remain sorted largest to smallest
295 bool "Support for hot-pluggable CPUs"
298 Say Y here to experiment with turning CPUs off and on. CPUs
299 can be controlled through /sys/devices/system/cpu.
301 source kernel/Kconfig.preempt
307 config ARCH_HAS_HOLES_MEMORYMODEL
308 def_bool y if SPARSEMEM
310 config ARCH_SPARSEMEM_ENABLE
312 select SPARSEMEM_VMEMMAP_ENABLE
314 config ARCH_SPARSEMEM_DEFAULT
315 def_bool ARCH_SPARSEMEM_ENABLE
317 config ARCH_SELECT_MEMORY_MODEL
318 def_bool ARCH_SPARSEMEM_ENABLE
320 config HAVE_ARCH_PFN_VALID
321 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
323 config HW_PERF_EVENTS
324 bool "Enable hardware performance counter support for perf events"
325 depends on PERF_EVENTS
328 Enable hardware performance counter support for perf events. If
329 disabled, perf events will use software events only.
331 config SYS_SUPPORTS_HUGETLBFS
334 config ARCH_WANT_GENERAL_HUGETLB
337 config ARCH_WANT_HUGE_PMD_SHARE
338 def_bool y if !ARM64_64K_PAGES
340 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
343 config ARCH_HAS_CACHE_LINE_SIZE
353 bool "Xen guest support on ARM64"
354 depends on ARM64 && OF
357 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
359 config FORCE_MAX_ZONEORDER
361 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
369 string "Default kernel command string"
372 Provide a set of default command-line options at build time by
373 entering them here. As a minimum, you should specify the the
374 root device (e.g. root=/dev/nfs).
377 bool "Always use the default kernel command string"
379 Always use the default kernel command string, even if the boot
380 loader passes other arguments to the kernel.
381 This is useful if you cannot or don't want to change the
382 command-line options your boot loader passes to the kernel.
388 bool "UEFI runtime support"
389 depends on OF && !CPU_BIG_ENDIAN
392 select EFI_PARAMS_FROM_FDT
393 select EFI_RUNTIME_WRAPPERS
398 This option provides support for runtime services provided
399 by UEFI firmware (such as non-volatile variables, realtime
400 clock, and platform reset). A UEFI stub is also provided to
401 allow the kernel to be booted as an EFI application. This
402 is only useful on systems that have UEFI firmware.
406 menu "Userspace binary formats"
408 source "fs/Kconfig.binfmt"
411 bool "Kernel support for 32-bit EL0"
412 depends on !ARM64_64K_PAGES
413 select COMPAT_BINFMT_ELF
415 select OLD_SIGSUSPEND3
416 select COMPAT_OLD_SIGACTION
418 This option enables support for a 32-bit EL0 running under a 64-bit
419 kernel at EL1. AArch32-specific components such as system calls,
420 the user helper functions, VFP support and the ptrace interface are
421 handled appropriately by the kernel.
423 If you want to execute 32-bit userspace applications, say Y.
425 config SYSVIPC_COMPAT
427 depends on COMPAT && SYSVIPC
431 menu "Power management options"
433 source "kernel/power/Kconfig"
435 config ARCH_SUSPEND_POSSIBLE
438 config ARM64_CPU_SUSPEND
443 menu "CPU Power Management"
445 source "drivers/cpuidle/Kconfig"
447 source "drivers/cpufreq/Kconfig"
453 source "drivers/Kconfig"
455 source "drivers/firmware/Kconfig"
459 source "arch/arm64/kvm/Kconfig"
461 source "arch/arm64/Kconfig.debug"
463 source "security/Kconfig"
465 source "crypto/Kconfig"
467 source "arch/arm64/crypto/Kconfig"