3 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
4 select ARCH_USE_CMPXCHG_LOCKREF
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
142 config CPU_BIG_ENDIAN
143 bool "Build big-endian kernel"
145 Say Y if you plan on running a kernel in big-endian mode.
148 bool "Symmetric Multi-Processing"
149 select USE_GENERIC_SMP_HELPERS
151 This enables support for systems with more than one CPU. If
152 you say N here, the kernel will run on single and
153 multiprocessor machines, but will use only one CPU of a
154 multiprocessor machine. If you say Y here, the kernel will run
155 on many, but not all, single processor machines. On a single
156 processor machine, the kernel will run faster if you say N
159 If you don't know what to do here, say N.
162 int "Maximum number of CPUs (2-32)"
165 # These have to remain sorted largest to smallest
166 default "8" if ARCH_XGENE
170 bool "Support for hot-pluggable CPUs"
173 Say Y here to experiment with turning CPUs off and on. CPUs
174 can be controlled through /sys/devices/system/cpu.
176 source kernel/Kconfig.preempt
182 config ARCH_HAS_HOLES_MEMORYMODEL
183 def_bool y if SPARSEMEM
185 config ARCH_SPARSEMEM_ENABLE
187 select SPARSEMEM_VMEMMAP_ENABLE
189 config ARCH_SPARSEMEM_DEFAULT
190 def_bool ARCH_SPARSEMEM_ENABLE
192 config ARCH_SELECT_MEMORY_MODEL
193 def_bool ARCH_SPARSEMEM_ENABLE
195 config HAVE_ARCH_PFN_VALID
196 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
198 config HW_PERF_EVENTS
199 bool "Enable hardware performance counter support for perf events"
200 depends on PERF_EVENTS
203 Enable hardware performance counter support for perf events. If
204 disabled, perf events will use software events only.
206 config SYS_SUPPORTS_HUGETLBFS
209 config ARCH_WANT_GENERAL_HUGETLB
212 config ARCH_WANT_HUGE_PMD_SHARE
213 def_bool y if !ARM64_64K_PAGES
215 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
225 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
226 depends on ARM64 && OF
228 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
230 config FORCE_MAX_ZONEORDER
232 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
240 string "Default kernel command string"
243 Provide a set of default command-line options at build time by
244 entering them here. As a minimum, you should specify the the
245 root device (e.g. root=/dev/nfs).
248 bool "Always use the default kernel command string"
250 Always use the default kernel command string, even if the boot
251 loader passes other arguments to the kernel.
252 This is useful if you cannot or don't want to change the
253 command-line options your boot loader passes to the kernel.
257 menu "Userspace binary formats"
259 source "fs/Kconfig.binfmt"
262 bool "Kernel support for 32-bit EL0"
263 depends on !ARM64_64K_PAGES
264 select COMPAT_BINFMT_ELF
266 select OLD_SIGSUSPEND3
267 select COMPAT_OLD_SIGACTION
269 This option enables support for a 32-bit EL0 running under a 64-bit
270 kernel at EL1. AArch32-specific components such as system calls,
271 the user helper functions, VFP support and the ptrace interface are
272 handled appropriately by the kernel.
274 If you want to execute 32-bit userspace applications, say Y.
276 config SYSVIPC_COMPAT
278 depends on COMPAT && SYSVIPC
284 source "drivers/Kconfig"
288 source "arch/arm64/kvm/Kconfig"
290 source "arch/arm64/Kconfig.debug"
292 source "security/Kconfig"
294 source "crypto/Kconfig"