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 RWSEM_GENERIC_SPINLOCK
68 config GENERIC_HWEIGHT
74 config GENERIC_CALIBRATE_DELAY
80 config ARCH_DMA_ADDR_T_64BIT
83 config NEED_DMA_MAP_STATE
86 config NEED_SG_DMA_LENGTH
95 config KERNEL_MODE_NEON
100 source "kernel/Kconfig.freezer"
102 menu "Platform selection"
105 bool "ARMv8 software model (Versatile Express)"
106 select ARCH_REQUIRE_GPIOLIB
107 select COMMON_CLK_VERSATILE
108 select POWER_RESET_VEXPRESS
109 select VEXPRESS_CONFIG
111 This enables support for the ARMv8 software model (Versatile
115 bool "AppliedMicro X-Gene SOC Family"
117 This enables support for AppliedMicro X-Gene SOC Family
128 menu "Kernel Features"
130 config ARM64_64K_PAGES
131 bool "Enable 64KB pages support"
133 This feature enables 64KB pages support (4KB by default)
134 allowing only two levels of page tables and faster TLB
135 look-up. AArch32 emulation is not available when this feature
138 config CPU_BIG_ENDIAN
139 bool "Build big-endian kernel"
141 Say Y if you plan on running a kernel in big-endian mode.
144 bool "Symmetric Multi-Processing"
145 select USE_GENERIC_SMP_HELPERS
147 This enables support for systems with more than one CPU. If
148 you say N here, the kernel will run on single and
149 multiprocessor machines, but will use only one CPU of a
150 multiprocessor machine. If you say Y here, the kernel will run
151 on many, but not all, single processor machines. On a single
152 processor machine, the kernel will run faster if you say N
155 If you don't know what to do here, say N.
158 int "Maximum number of CPUs (2-32)"
161 # These have to remain sorted largest to smallest
162 default "8" if ARCH_XGENE
166 bool "Support for hot-pluggable CPUs"
169 Say Y here to experiment with turning CPUs off and on. CPUs
170 can be controlled through /sys/devices/system/cpu.
172 source kernel/Kconfig.preempt
178 config ARCH_HAS_HOLES_MEMORYMODEL
179 def_bool y if SPARSEMEM
181 config ARCH_SPARSEMEM_ENABLE
183 select SPARSEMEM_VMEMMAP_ENABLE
185 config ARCH_SPARSEMEM_DEFAULT
186 def_bool ARCH_SPARSEMEM_ENABLE
188 config ARCH_SELECT_MEMORY_MODEL
189 def_bool ARCH_SPARSEMEM_ENABLE
191 config HAVE_ARCH_PFN_VALID
192 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
194 config HW_PERF_EVENTS
195 bool "Enable hardware performance counter support for perf events"
196 depends on PERF_EVENTS
199 Enable hardware performance counter support for perf events. If
200 disabled, perf events will use software events only.
202 config SYS_SUPPORTS_HUGETLBFS
205 config ARCH_WANT_GENERAL_HUGETLB
208 config ARCH_WANT_HUGE_PMD_SHARE
209 def_bool y if !ARM64_64K_PAGES
211 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
221 bool "Xen guest support on ARM64 (EXPERIMENTAL)"
222 depends on ARM64 && OF
224 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
226 config FORCE_MAX_ZONEORDER
228 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
236 string "Default kernel command string"
239 Provide a set of default command-line options at build time by
240 entering them here. As a minimum, you should specify the the
241 root device (e.g. root=/dev/nfs).
244 bool "Always use the default kernel command string"
246 Always use the default kernel command string, even if the boot
247 loader passes other arguments to the kernel.
248 This is useful if you cannot or don't want to change the
249 command-line options your boot loader passes to the kernel.
253 menu "Userspace binary formats"
255 source "fs/Kconfig.binfmt"
258 bool "Kernel support for 32-bit EL0"
259 depends on !ARM64_64K_PAGES
260 select COMPAT_BINFMT_ELF
262 select OLD_SIGSUSPEND3
263 select COMPAT_OLD_SIGACTION
265 This option enables support for a 32-bit EL0 running under a 64-bit
266 kernel at EL1. AArch32-specific components such as system calls,
267 the user helper functions, VFP support and the ptrace interface are
268 handled appropriately by the kernel.
270 If you want to execute 32-bit userspace applications, say Y.
272 config SYSVIPC_COMPAT
274 depends on COMPAT && SYSVIPC
280 source "drivers/Kconfig"
284 source "arch/arm64/kvm/Kconfig"
286 source "arch/arm64/Kconfig.debug"
288 source "security/Kconfig"
290 source "crypto/Kconfig"