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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_CPU_AUTOPROBE
 20         select GENERIC_EARLY_IOREMAP
 21         select GENERIC_IOMAP
 22         select GENERIC_IRQ_PROBE
 23         select GENERIC_IRQ_SHOW
 24         select GENERIC_SCHED_CLOCK
 25         select GENERIC_SMP_IDLE_THREAD
 26         select GENERIC_STRNCPY_FROM_USER
 27         select GENERIC_STRNLEN_USER
 28         select GENERIC_TIME_VSYSCALL
 29         select HARDIRQS_SW_RESEND
 30         select HAVE_ARCH_JUMP_LABEL
 31         select HAVE_ARCH_KGDB
 32         select HAVE_ARCH_TRACEHOOK
 33         select HAVE_DEBUG_BUGVERBOSE
 34         select HAVE_DEBUG_KMEMLEAK
 35         select HAVE_DMA_API_DEBUG
 36         select HAVE_DMA_ATTRS
 37         select HAVE_DMA_CONTIGUOUS
 38         select HAVE_EFFICIENT_UNALIGNED_ACCESS
 39         select HAVE_GENERIC_DMA_COHERENT
 40         select HAVE_HW_BREAKPOINT if PERF_EVENTS
 41         select HAVE_MEMBLOCK
 42         select HAVE_PATA_PLATFORM
 43         select HAVE_PERF_EVENTS
 44         select HAVE_PERF_REGS
 45         select HAVE_PERF_USER_STACK_DUMP
 46         select IRQ_DOMAIN
 47         select MODULES_USE_ELF_RELA
 48         select NO_BOOTMEM
 49         select OF
 50         select OF_EARLY_FLATTREE
 51         select OF_RESERVED_MEM
 52         select PERF_USE_VMALLOC
 53         select POWER_RESET
 54         select POWER_SUPPLY
 55         select RTC_LIB
 56         select SPARSE_IRQ
 57         select SYSCTL_EXCEPTION_TRACE
 58         help
 59           ARM 64-bit (AArch64) Linux support.
 60 
 61 config 64BIT
 62         def_bool y
 63 
 64 config ARCH_PHYS_ADDR_T_64BIT
 65         def_bool y
 66 
 67 config MMU
 68         def_bool y
 69 
 70 config NO_IOPORT_MAP
 71         def_bool y
 72 
 73 config STACKTRACE_SUPPORT
 74         def_bool y
 75 
 76 config LOCKDEP_SUPPORT
 77         def_bool y
 78 
 79 config TRACE_IRQFLAGS_SUPPORT
 80         def_bool y
 81 
 82 config RWSEM_XCHGADD_ALGORITHM
 83         def_bool y
 84 
 85 config GENERIC_HWEIGHT
 86         def_bool y
 87 
 88 config GENERIC_CSUM
 89         def_bool y
 90 
 91 config GENERIC_CALIBRATE_DELAY
 92         def_bool y
 93 
 94 config ZONE_DMA
 95         def_bool y
 96 
 97 config ARCH_DMA_ADDR_T_64BIT
 98         def_bool y
 99 
100 config NEED_DMA_MAP_STATE
101         def_bool y
102 
103 config NEED_SG_DMA_LENGTH
104         def_bool y
105 
106 config SWIOTLB
107         def_bool y
108 
109 config IOMMU_HELPER
110         def_bool SWIOTLB
111 
112 config KERNEL_MODE_NEON
113         def_bool y
114 
115 source "init/Kconfig"
116 
117 source "kernel/Kconfig.freezer"
118 
119 menu "Platform selection"
120 
121 config ARCH_VEXPRESS
122         bool "ARMv8 software model (Versatile Express)"
123         select ARCH_REQUIRE_GPIOLIB
124         select COMMON_CLK_VERSATILE
125         select POWER_RESET_VEXPRESS
126         select VEXPRESS_CONFIG
127         help
128           This enables support for the ARMv8 software model (Versatile
129           Express).
130 
131 config ARCH_XGENE
132         bool "AppliedMicro X-Gene SOC Family"
133         help
134           This enables support for AppliedMicro X-Gene SOC Family
135 
136 endmenu
137 
138 menu "Bus support"
139 
140 config ARM_AMBA
141         bool
142 
143 endmenu
144 
145 menu "Kernel Features"
146 
147 config ARM64_64K_PAGES
148         bool "Enable 64KB pages support"
149         help
150           This feature enables 64KB pages support (4KB by default)
151           allowing only two levels of page tables and faster TLB
152           look-up. AArch32 emulation is not available when this feature
153           is enabled.
154 
155 config CPU_BIG_ENDIAN
156        bool "Build big-endian kernel"
157        help
158          Say Y if you plan on running a kernel in big-endian mode.
159 
160 config SMP
161         bool "Symmetric Multi-Processing"
162         help
163           This enables support for systems with more than one CPU.  If
164           you say N here, the kernel will run on single and
165           multiprocessor machines, but will use only one CPU of a
166           multiprocessor machine. If you say Y here, the kernel will run
167           on many, but not all, single processor machines. On a single
168           processor machine, the kernel will run faster if you say N
169           here.
170 
171           If you don't know what to do here, say N.
172 
173 config SCHED_MC
174         bool "Multi-core scheduler support"
175         depends on SMP
176         help
177           Multi-core scheduler support improves the CPU scheduler's decision
178           making when dealing with multi-core CPU chips at a cost of slightly
179           increased overhead in some places. If unsure say N here.
180 
181 config SCHED_SMT
182         bool "SMT scheduler support"
183         depends on SMP
184         help
185           Improves the CPU scheduler's decision making when dealing with
186           MultiThreading at a cost of slightly increased overhead in some
187           places. If unsure say N here.
188 
189 config NR_CPUS
190         int "Maximum number of CPUs (2-32)"
191         range 2 32
192         depends on SMP
193         # These have to remain sorted largest to smallest
194         default "8"
195 
196 config HOTPLUG_CPU
197         bool "Support for hot-pluggable CPUs"
198         depends on SMP
199         help
200           Say Y here to experiment with turning CPUs off and on.  CPUs
201           can be controlled through /sys/devices/system/cpu.
202 
203 source kernel/Kconfig.preempt
204 
205 config HZ
206         int
207         default 100
208 
209 config ARCH_HAS_HOLES_MEMORYMODEL
210         def_bool y if SPARSEMEM
211 
212 config ARCH_SPARSEMEM_ENABLE
213         def_bool y
214         select SPARSEMEM_VMEMMAP_ENABLE
215 
216 config ARCH_SPARSEMEM_DEFAULT
217         def_bool ARCH_SPARSEMEM_ENABLE
218 
219 config ARCH_SELECT_MEMORY_MODEL
220         def_bool ARCH_SPARSEMEM_ENABLE
221 
222 config HAVE_ARCH_PFN_VALID
223         def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
224 
225 config HW_PERF_EVENTS
226         bool "Enable hardware performance counter support for perf events"
227         depends on PERF_EVENTS
228         default y
229         help
230           Enable hardware performance counter support for perf events. If
231           disabled, perf events will use software events only.
232 
233 config SYS_SUPPORTS_HUGETLBFS
234         def_bool y
235 
236 config ARCH_WANT_GENERAL_HUGETLB
237         def_bool y
238 
239 config ARCH_WANT_HUGE_PMD_SHARE
240         def_bool y if !ARM64_64K_PAGES
241 
242 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
243         def_bool y
244 
245 source "mm/Kconfig"
246 
247 config XEN_DOM0
248         def_bool y
249         depends on XEN
250 
251 config XEN
252         bool "Xen guest support on ARM64 (EXPERIMENTAL)"
253         depends on ARM64 && OF
254         select SWIOTLB_XEN
255         help
256           Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
257 
258 config FORCE_MAX_ZONEORDER
259         int
260         default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
261         default "11"
262 
263 endmenu
264 
265 menu "Boot options"
266 
267 config CMDLINE
268         string "Default kernel command string"
269         default ""
270         help
271           Provide a set of default command-line options at build time by
272           entering them here. As a minimum, you should specify the the
273           root device (e.g. root=/dev/nfs).
274 
275 config CMDLINE_FORCE
276         bool "Always use the default kernel command string"
277         help
278           Always use the default kernel command string, even if the boot
279           loader passes other arguments to the kernel.
280           This is useful if you cannot or don't want to change the
281           command-line options your boot loader passes to the kernel.
282 
283 endmenu
284 
285 menu "Userspace binary formats"
286 
287 source "fs/Kconfig.binfmt"
288 
289 config COMPAT
290         bool "Kernel support for 32-bit EL0"
291         depends on !ARM64_64K_PAGES
292         select COMPAT_BINFMT_ELF
293         select HAVE_UID16
294         select OLD_SIGSUSPEND3
295         select COMPAT_OLD_SIGACTION
296         help
297           This option enables support for a 32-bit EL0 running under a 64-bit
298           kernel at EL1. AArch32-specific components such as system calls,
299           the user helper functions, VFP support and the ptrace interface are
300           handled appropriately by the kernel.
301 
302           If you want to execute 32-bit userspace applications, say Y.
303 
304 config SYSVIPC_COMPAT
305         def_bool y
306         depends on COMPAT && SYSVIPC
307 
308 endmenu
309 
310 menu "Power management options"
311 
312 source "kernel/power/Kconfig"
313 
314 config ARCH_SUSPEND_POSSIBLE
315         def_bool y
316 
317 config ARM64_CPU_SUSPEND
318         def_bool PM_SLEEP
319 
320 endmenu
321 
322 menu "CPU Power Management"
323 
324 source "drivers/cpuidle/Kconfig"
325 
326 source "drivers/cpufreq/Kconfig"
327 
328 endmenu
329 
330 source "net/Kconfig"
331 
332 source "drivers/Kconfig"
333 
334 source "fs/Kconfig"
335 
336 source "arch/arm64/kvm/Kconfig"
337 
338 source "arch/arm64/Kconfig.debug"
339 
340 source "security/Kconfig"
341 
342 source "crypto/Kconfig"
343 
344 source "lib/Kconfig"

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