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Linux/arch/arm64/Kconfig

  1 config ARM64
  2         def_bool y
  3         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  4         select ARCH_USE_CMPXCHG_LOCKREF
  5         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  6         select ARCH_WANT_OPTIONAL_GPIOLIB
  7         select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
  8         select ARCH_WANT_FRAME_POINTERS
  9         select ARM_AMBA
 10         select ARM_ARCH_TIMER
 11         select ARM_GIC
 12         select BUILDTIME_EXTABLE_SORT
 13         select CLONE_BACKWARDS
 14         select COMMON_CLK
 15         select CPU_PM if (SUSPEND || CPU_IDLE)
 16         select DCACHE_WORD_ACCESS
 17         select GENERIC_CLOCKEVENTS
 18         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 19         select GENERIC_IOMAP
 20         select GENERIC_IRQ_PROBE
 21         select GENERIC_IRQ_SHOW
 22         select GENERIC_SCHED_CLOCK
 23         select GENERIC_SMP_IDLE_THREAD
 24         select GENERIC_STRNCPY_FROM_USER
 25         select GENERIC_STRNLEN_USER
 26         select GENERIC_TIME_VSYSCALL
 27         select HARDIRQS_SW_RESEND
 28         select HAVE_ARCH_JUMP_LABEL
 29         select HAVE_ARCH_TRACEHOOK
 30         select HAVE_DEBUG_BUGVERBOSE
 31         select HAVE_DEBUG_KMEMLEAK
 32         select HAVE_DMA_API_DEBUG
 33         select HAVE_DMA_ATTRS
 34         select HAVE_DMA_CONTIGUOUS
 35         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 36         select HAVE_GENERIC_DMA_COHERENT
 37         select HAVE_HW_BREAKPOINT if PERF_EVENTS
 38         select HAVE_MEMBLOCK
 39         select HAVE_PATA_PLATFORM
 40         select HAVE_PERF_EVENTS
 41         select IRQ_DOMAIN
 42         select MODULES_USE_ELF_RELA
 43         select NO_BOOTMEM
 44         select OF
 45         select OF_EARLY_FLATTREE
 46         select PERF_USE_VMALLOC
 47         select POWER_RESET
 48         select POWER_SUPPLY
 49         select RTC_LIB
 50         select SPARSE_IRQ
 51         select SYSCTL_EXCEPTION_TRACE
 52         help
 53           ARM 64-bit (AArch64) Linux support.
 54 
 55 config 64BIT
 56         def_bool y
 57 
 58 config ARCH_PHYS_ADDR_T_64BIT
 59         def_bool y
 60 
 61 config MMU
 62         def_bool y
 63 
 64 config NO_IOPORT
 65         def_bool y
 66 
 67 config STACKTRACE_SUPPORT
 68         def_bool y
 69 
 70 config LOCKDEP_SUPPORT
 71         def_bool y
 72 
 73 config TRACE_IRQFLAGS_SUPPORT
 74         def_bool y
 75 
 76 config RWSEM_GENERIC_SPINLOCK
 77         def_bool y
 78 
 79 config GENERIC_HWEIGHT
 80         def_bool y
 81 
 82 config GENERIC_CSUM
 83         def_bool y
 84 
 85 config GENERIC_CALIBRATE_DELAY
 86         def_bool y
 87 
 88 config ZONE_DMA32
 89         def_bool y
 90 
 91 config ARCH_DMA_ADDR_T_64BIT
 92         def_bool y
 93 
 94 config NEED_DMA_MAP_STATE
 95         def_bool y
 96 
 97 config NEED_SG_DMA_LENGTH
 98         def_bool y
 99 
100 config SWIOTLB
101         def_bool y
102 
103 config IOMMU_HELPER
104         def_bool SWIOTLB
105 
106 config KERNEL_MODE_NEON
107         def_bool y
108 
109 source "init/Kconfig"
110 
111 source "kernel/Kconfig.freezer"
112 
113 menu "Platform selection"
114 
115 config ARCH_VEXPRESS
116         bool "ARMv8 software model (Versatile Express)"
117         select ARCH_REQUIRE_GPIOLIB
118         select COMMON_CLK_VERSATILE
119         select POWER_RESET_VEXPRESS
120         select VEXPRESS_CONFIG
121         help
122           This enables support for the ARMv8 software model (Versatile
123           Express).
124 
125 config ARCH_XGENE
126         bool "AppliedMicro X-Gene SOC Family"
127         help
128           This enables support for AppliedMicro X-Gene SOC Family
129 
130 endmenu
131 
132 menu "Bus support"
133 
134 config ARM_AMBA
135         bool
136 
137 endmenu
138 
139 menu "Kernel Features"
140 
141 config ARM64_64K_PAGES
142         bool "Enable 64KB pages support"
143         help
144           This feature enables 64KB pages support (4KB by default)
145           allowing only two levels of page tables and faster TLB
146           look-up. AArch32 emulation is not available when this feature
147           is enabled.
148 
149 config CPU_BIG_ENDIAN
150        bool "Build big-endian kernel"
151        help
152          Say Y if you plan on running a kernel in big-endian mode.
153 
154 config SMP
155         bool "Symmetric Multi-Processing"
156         help
157           This enables support for systems with more than one CPU.  If
158           you say N here, the kernel will run on single and
159           multiprocessor machines, but will use only one CPU of a
160           multiprocessor machine. If you say Y here, the kernel will run
161           on many, but not all, single processor machines. On a single
162           processor machine, the kernel will run faster if you say N
163           here.
164 
165           If you don't know what to do here, say N.
166 
167 config NR_CPUS
168         int "Maximum number of CPUs (2-32)"
169         range 2 32
170         depends on SMP
171         # These have to remain sorted largest to smallest
172         default "8"
173 
174 config HOTPLUG_CPU
175         bool "Support for hot-pluggable CPUs"
176         depends on SMP
177         help
178           Say Y here to experiment with turning CPUs off and on.  CPUs
179           can be controlled through /sys/devices/system/cpu.
180 
181 source kernel/Kconfig.preempt
182 
183 config HZ
184         int
185         default 100
186 
187 config ARCH_HAS_HOLES_MEMORYMODEL
188         def_bool y if SPARSEMEM
189 
190 config ARCH_SPARSEMEM_ENABLE
191         def_bool y
192         select SPARSEMEM_VMEMMAP_ENABLE
193 
194 config ARCH_SPARSEMEM_DEFAULT
195         def_bool ARCH_SPARSEMEM_ENABLE
196 
197 config ARCH_SELECT_MEMORY_MODEL
198         def_bool ARCH_SPARSEMEM_ENABLE
199 
200 config HAVE_ARCH_PFN_VALID
201         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
202 
203 config HW_PERF_EVENTS
204         bool "Enable hardware performance counter support for perf events"
205         depends on PERF_EVENTS
206         default y
207         help
208           Enable hardware performance counter support for perf events. If
209           disabled, perf events will use software events only.
210 
211 config SYS_SUPPORTS_HUGETLBFS
212         def_bool y
213 
214 config ARCH_WANT_GENERAL_HUGETLB
215         def_bool y
216 
217 config ARCH_WANT_HUGE_PMD_SHARE
218         def_bool y if !ARM64_64K_PAGES
219 
220 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
221         def_bool y
222 
223 source "mm/Kconfig"
224 
225 config XEN_DOM0
226         def_bool y
227         depends on XEN
228 
229 config XEN
230         bool "Xen guest support on ARM64 (EXPERIMENTAL)"
231         depends on ARM64 && OF
232         select SWIOTLB_XEN
233         help
234           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
235 
236 config FORCE_MAX_ZONEORDER
237         int
238         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
239         default "11"
240 
241 endmenu
242 
243 menu "Boot options"
244 
245 config CMDLINE
246         string "Default kernel command string"
247         default ""
248         help
249           Provide a set of default command-line options at build time by
250           entering them here. As a minimum, you should specify the the
251           root device (e.g. root=/dev/nfs).
252 
253 config CMDLINE_FORCE
254         bool "Always use the default kernel command string"
255         help
256           Always use the default kernel command string, even if the boot
257           loader passes other arguments to the kernel.
258           This is useful if you cannot or don't want to change the
259           command-line options your boot loader passes to the kernel.
260 
261 endmenu
262 
263 menu "Userspace binary formats"
264 
265 source "fs/Kconfig.binfmt"
266 
267 config COMPAT
268         bool "Kernel support for 32-bit EL0"
269         depends on !ARM64_64K_PAGES
270         select COMPAT_BINFMT_ELF
271         select HAVE_UID16
272         select OLD_SIGSUSPEND3
273         select COMPAT_OLD_SIGACTION
274         help
275           This option enables support for a 32-bit EL0 running under a 64-bit
276           kernel at EL1. AArch32-specific components such as system calls,
277           the user helper functions, VFP support and the ptrace interface are
278           handled appropriately by the kernel.
279 
280           If you want to execute 32-bit userspace applications, say Y.
281 
282 config SYSVIPC_COMPAT
283         def_bool y
284         depends on COMPAT && SYSVIPC
285 
286 endmenu
287 
288 menu "Power management options"
289 
290 source "kernel/power/Kconfig"
291 
292 config ARCH_SUSPEND_POSSIBLE
293         def_bool y
294 
295 config ARM64_CPU_SUSPEND
296         def_bool PM_SLEEP
297 
298 endmenu
299 
300 menu "CPU Power Management"
301 
302 source "drivers/cpuidle/Kconfig"
303 
304 endmenu
305 
306 source "net/Kconfig"
307 
308 source "drivers/Kconfig"
309 
310 source "fs/Kconfig"
311 
312 source "arch/arm64/kvm/Kconfig"
313 
314 source "arch/arm64/Kconfig.debug"
315 
316 source "security/Kconfig"
317 
318 source "crypto/Kconfig"
319 
320 source "lib/Kconfig"

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