3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
4 select ARCH_SUPPORTS_ATOMIC_RMW
5 select ARCH_WANT_OPTIONAL_GPIOLIB
6 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
7 select ARCH_WANT_FRAME_POINTERS
11 select BUILDTIME_EXTABLE_SORT
12 select CLONE_BACKWARDS
14 select GENERIC_CLOCKEVENTS
16 select GENERIC_IRQ_PROBE
17 select GENERIC_IRQ_SHOW
18 select GENERIC_SMP_IDLE_THREAD
19 select GENERIC_TIME_VSYSCALL
20 select HARDIRQS_SW_RESEND
21 select HAVE_ARCH_TRACEHOOK
22 select HAVE_DEBUG_BUGVERBOSE
23 select HAVE_DEBUG_KMEMLEAK
24 select HAVE_DMA_API_DEBUG
26 select HAVE_GENERIC_DMA_COHERENT
27 select HAVE_HW_BREAKPOINT if PERF_EVENTS
29 select HAVE_PERF_EVENTS
31 select MODULES_USE_ELF_RELA
34 select OF_EARLY_FLATTREE
35 select PERF_USE_VMALLOC
40 select SYSCTL_EXCEPTION_TRACE
42 ARM 64-bit (AArch64) Linux support.
47 config ARCH_PHYS_ADDR_T_64BIT
56 config STACKTRACE_SUPPORT
59 config LOCKDEP_SUPPORT
62 config TRACE_IRQFLAGS_SUPPORT
65 config GENERIC_LOCKBREAK
67 depends on SMP && PREEMPT
69 config RWSEM_GENERIC_SPINLOCK
72 config GENERIC_HWEIGHT
78 config GENERIC_CALIBRATE_DELAY
84 config ARCH_DMA_ADDR_T_64BIT
87 config NEED_DMA_MAP_STATE
90 config NEED_SG_DMA_LENGTH
99 config KERNEL_MODE_NEON
102 source "init/Kconfig"
104 source "kernel/Kconfig.freezer"
106 menu "Platform selection"
109 bool "ARMv8 software model (Versatile Express)"
110 select ARCH_REQUIRE_GPIOLIB
111 select COMMON_CLK_VERSATILE
112 select POWER_RESET_VEXPRESS
113 select VEXPRESS_CONFIG
115 This enables support for the ARMv8 software model (Versatile
119 bool "AppliedMicro X-Gene SOC Family"
121 This enables support for AppliedMicro X-Gene SOC Family
132 menu "Kernel Features"
134 config ARM64_64K_PAGES
135 bool "Enable 64KB pages support"
137 This feature enables 64KB pages support (4KB by default)
138 allowing only two levels of page tables and faster TLB
139 look-up. AArch32 emulation is not available when this feature
143 bool "Symmetric Multi-Processing"
144 select USE_GENERIC_SMP_HELPERS
146 This enables support for systems with more than one CPU. If
147 you say N here, the kernel will run on single and
148 multiprocessor machines, but will use only one CPU of a
149 multiprocessor machine. If you say Y here, the kernel will run
150 on many, but not all, single processor machines. On a single
151 processor machine, the kernel will run faster if you say N
154 If you don't know what to do here, say N.
157 int "Maximum number of CPUs (2-32)"
160 # These have to remain sorted largest to smallest
161 default "8" if ARCH_XGENE
164 source kernel/Kconfig.preempt
170 config ARCH_HAS_HOLES_MEMORYMODEL
171 def_bool y if SPARSEMEM
173 config ARCH_SPARSEMEM_ENABLE
175 select SPARSEMEM_VMEMMAP_ENABLE
177 config ARCH_SPARSEMEM_DEFAULT
178 def_bool ARCH_SPARSEMEM_ENABLE
180 config ARCH_SELECT_MEMORY_MODEL
181 def_bool ARCH_SPARSEMEM_ENABLE
183 config HAVE_ARCH_PFN_VALID
184 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
186 config HW_PERF_EVENTS
187 bool "Enable hardware performance counter support for perf events"
188 depends on PERF_EVENTS
191 Enable hardware performance counter support for perf events. If
192 disabled, perf events will use software events only.
194 config SYS_SUPPORTS_HUGETLBFS
197 config ARCH_WANT_GENERAL_HUGETLB
200 config ARCH_WANT_HUGE_PMD_SHARE
201 def_bool y if !ARM64_64K_PAGES
203 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
213 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
214 depends on ARM64 && OF
216 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
218 config FORCE_MAX_ZONEORDER
220 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
228 string "Default kernel command string"
231 Provide a set of default command-line options at build time by
232 entering them here. As a minimum, you should specify the the
233 root device (e.g. root=/dev/nfs).
236 bool "Always use the default kernel command string"
238 Always use the default kernel command string, even if the boot
239 loader passes other arguments to the kernel.
240 This is useful if you cannot or don't want to change the
241 command-line options your boot loader passes to the kernel.
245 menu "Userspace binary formats"
247 source "fs/Kconfig.binfmt"
250 bool "Kernel support for 32-bit EL0"
251 depends on !ARM64_64K_PAGES
252 select COMPAT_BINFMT_ELF
254 select OLD_SIGSUSPEND3
255 select COMPAT_OLD_SIGACTION
257 This option enables support for a 32-bit EL0 running under a 64-bit
258 kernel at EL1. AArch32-specific components such as system calls,
259 the user helper functions, VFP support and the ptrace interface are
260 handled appropriately by the kernel.
262 If you want to execute 32-bit userspace applications, say Y.
264 config SYSVIPC_COMPAT
266 depends on COMPAT && SYSVIPC
272 source "drivers/Kconfig"
276 source "arch/arm64/kvm/Kconfig"
278 source "arch/arm64/Kconfig.debug"
280 source "security/Kconfig"
282 source "crypto/Kconfig"