Merge remote-tracking branches 'spi/fix/dw', 'spi/fix/orion', 'spi/fix/pl022', 'spi...
[deliverable/linux.git] / arch / arm64 / Kconfig
1 config ARM64
2 def_bool y
3 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
4 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
5 select ARCH_HAS_SG_CHAIN
6 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
7 select ARCH_USE_CMPXCHG_LOCKREF
8 select ARCH_SUPPORTS_ATOMIC_RMW
9 select ARCH_WANT_OPTIONAL_GPIOLIB
10 select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
11 select ARCH_WANT_FRAME_POINTERS
12 select ARM_AMBA
13 select ARM_ARCH_TIMER
14 select ARM_GIC
15 select AUDIT_ARCH_COMPAT_GENERIC
16 select ARM_GIC_V3
17 select BUILDTIME_EXTABLE_SORT
18 select CLONE_BACKWARDS
19 select COMMON_CLK
20 select CPU_PM if (SUSPEND || CPU_IDLE)
21 select DCACHE_WORD_ACCESS
22 select GENERIC_ALLOCATOR
23 select GENERIC_CLOCKEVENTS
24 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
25 select GENERIC_CPU_AUTOPROBE
26 select GENERIC_EARLY_IOREMAP
27 select GENERIC_IOMAP
28 select GENERIC_IRQ_PROBE
29 select GENERIC_IRQ_SHOW
30 select GENERIC_SCHED_CLOCK
31 select GENERIC_SMP_IDLE_THREAD
32 select GENERIC_STRNCPY_FROM_USER
33 select GENERIC_STRNLEN_USER
34 select GENERIC_TIME_VSYSCALL
35 select HANDLE_DOMAIN_IRQ
36 select HARDIRQS_SW_RESEND
37 select HAVE_ARCH_AUDITSYSCALL
38 select HAVE_ARCH_JUMP_LABEL
39 select HAVE_ARCH_KGDB
40 select HAVE_ARCH_TRACEHOOK
41 select HAVE_BPF_JIT
42 select HAVE_C_RECORDMCOUNT
43 select HAVE_CC_STACKPROTECTOR
44 select HAVE_DEBUG_BUGVERBOSE
45 select HAVE_DEBUG_KMEMLEAK
46 select HAVE_DMA_API_DEBUG
47 select HAVE_DMA_ATTRS
48 select HAVE_DMA_CONTIGUOUS
49 select HAVE_DYNAMIC_FTRACE
50 select HAVE_EFFICIENT_UNALIGNED_ACCESS
51 select HAVE_FTRACE_MCOUNT_RECORD
52 select HAVE_FUNCTION_TRACER
53 select HAVE_FUNCTION_GRAPH_TRACER
54 select HAVE_GENERIC_DMA_COHERENT
55 select HAVE_HW_BREAKPOINT if PERF_EVENTS
56 select HAVE_MEMBLOCK
57 select HAVE_PATA_PLATFORM
58 select HAVE_PERF_EVENTS
59 select HAVE_PERF_REGS
60 select HAVE_PERF_USER_STACK_DUMP
61 select HAVE_RCU_TABLE_FREE
62 select HAVE_SYSCALL_TRACEPOINTS
63 select IRQ_DOMAIN
64 select MODULES_USE_ELF_RELA
65 select NO_BOOTMEM
66 select OF
67 select OF_EARLY_FLATTREE
68 select OF_RESERVED_MEM
69 select PERF_USE_VMALLOC
70 select POWER_RESET
71 select POWER_SUPPLY
72 select RTC_LIB
73 select SPARSE_IRQ
74 select SYSCTL_EXCEPTION_TRACE
75 select HAVE_CONTEXT_TRACKING
76 help
77 ARM 64-bit (AArch64) Linux support.
78
79 config 64BIT
80 def_bool y
81
82 config ARCH_PHYS_ADDR_T_64BIT
83 def_bool y
84
85 config MMU
86 def_bool y
87
88 config NO_IOPORT_MAP
89 def_bool y if !PCI
90
91 config STACKTRACE_SUPPORT
92 def_bool y
93
94 config LOCKDEP_SUPPORT
95 def_bool y
96
97 config TRACE_IRQFLAGS_SUPPORT
98 def_bool y
99
100 config RWSEM_XCHGADD_ALGORITHM
101 def_bool y
102
103 config GENERIC_HWEIGHT
104 def_bool y
105
106 config GENERIC_CSUM
107 def_bool y
108
109 config GENERIC_CALIBRATE_DELAY
110 def_bool y
111
112 config ZONE_DMA
113 def_bool y
114
115 config HAVE_GENERIC_RCU_GUP
116 def_bool y
117
118 config ARCH_DMA_ADDR_T_64BIT
119 def_bool y
120
121 config NEED_DMA_MAP_STATE
122 def_bool y
123
124 config NEED_SG_DMA_LENGTH
125 def_bool y
126
127 config SWIOTLB
128 def_bool y
129
130 config IOMMU_HELPER
131 def_bool SWIOTLB
132
133 config KERNEL_MODE_NEON
134 def_bool y
135
136 config FIX_EARLYCON_MEM
137 def_bool y
138
139 source "init/Kconfig"
140
141 source "kernel/Kconfig.freezer"
142
143 menu "Platform selection"
144
145 config ARCH_THUNDER
146 bool "Cavium Inc. Thunder SoC Family"
147 help
148 This enables support for Cavium's Thunder Family of SoCs.
149
150 config ARCH_VEXPRESS
151 bool "ARMv8 software model (Versatile Express)"
152 select ARCH_REQUIRE_GPIOLIB
153 select COMMON_CLK_VERSATILE
154 select POWER_RESET_VEXPRESS
155 select VEXPRESS_CONFIG
156 help
157 This enables support for the ARMv8 software model (Versatile
158 Express).
159
160 config ARCH_XGENE
161 bool "AppliedMicro X-Gene SOC Family"
162 help
163 This enables support for AppliedMicro X-Gene SOC Family
164
165 endmenu
166
167 menu "Bus support"
168
169 config ARM_AMBA
170 bool
171
172 config PCI
173 bool "PCI support"
174 help
175 This feature enables support for PCI bus system. If you say Y
176 here, the kernel will include drivers and infrastructure code
177 to support PCI bus devices.
178
179 config PCI_DOMAINS
180 def_bool PCI
181
182 config PCI_DOMAINS_GENERIC
183 def_bool PCI
184
185 config PCI_SYSCALL
186 def_bool PCI
187
188 source "drivers/pci/Kconfig"
189 source "drivers/pci/pcie/Kconfig"
190 source "drivers/pci/hotplug/Kconfig"
191
192 endmenu
193
194 menu "Kernel Features"
195
196 choice
197 prompt "Page size"
198 default ARM64_4K_PAGES
199 help
200 Page size (translation granule) configuration.
201
202 config ARM64_4K_PAGES
203 bool "4KB"
204 help
205 This feature enables 4KB pages support.
206
207 config ARM64_64K_PAGES
208 bool "64KB"
209 help
210 This feature enables 64KB pages support (4KB by default)
211 allowing only two levels of page tables and faster TLB
212 look-up. AArch32 emulation is not available when this feature
213 is enabled.
214
215 endchoice
216
217 choice
218 prompt "Virtual address space size"
219 default ARM64_VA_BITS_39 if ARM64_4K_PAGES
220 default ARM64_VA_BITS_42 if ARM64_64K_PAGES
221 help
222 Allows choosing one of multiple possible virtual address
223 space sizes. The level of translation table is determined by
224 a combination of page size and virtual address space size.
225
226 config ARM64_VA_BITS_39
227 bool "39-bit"
228 depends on ARM64_4K_PAGES
229
230 config ARM64_VA_BITS_42
231 bool "42-bit"
232 depends on ARM64_64K_PAGES
233
234 config ARM64_VA_BITS_48
235 bool "48-bit"
236 depends on !ARM_SMMU
237
238 endchoice
239
240 config ARM64_VA_BITS
241 int
242 default 39 if ARM64_VA_BITS_39
243 default 42 if ARM64_VA_BITS_42
244 default 48 if ARM64_VA_BITS_48
245
246 config ARM64_PGTABLE_LEVELS
247 int
248 default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
249 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
250 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
251 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
252
253 config CPU_BIG_ENDIAN
254 bool "Build big-endian kernel"
255 help
256 Say Y if you plan on running a kernel in big-endian mode.
257
258 config SMP
259 bool "Symmetric Multi-Processing"
260 help
261 This enables support for systems with more than one CPU. If
262 you say N here, the kernel will run on single and
263 multiprocessor machines, but will use only one CPU of a
264 multiprocessor machine. If you say Y here, the kernel will run
265 on many, but not all, single processor machines. On a single
266 processor machine, the kernel will run faster if you say N
267 here.
268
269 If you don't know what to do here, say N.
270
271 config SCHED_MC
272 bool "Multi-core scheduler support"
273 depends on SMP
274 help
275 Multi-core scheduler support improves the CPU scheduler's decision
276 making when dealing with multi-core CPU chips at a cost of slightly
277 increased overhead in some places. If unsure say N here.
278
279 config SCHED_SMT
280 bool "SMT scheduler support"
281 depends on SMP
282 help
283 Improves the CPU scheduler's decision making when dealing with
284 MultiThreading at a cost of slightly increased overhead in some
285 places. If unsure say N here.
286
287 config NR_CPUS
288 int "Maximum number of CPUs (2-64)"
289 range 2 64
290 depends on SMP
291 # These have to remain sorted largest to smallest
292 default "64"
293
294 config HOTPLUG_CPU
295 bool "Support for hot-pluggable CPUs"
296 depends on SMP
297 help
298 Say Y here to experiment with turning CPUs off and on. CPUs
299 can be controlled through /sys/devices/system/cpu.
300
301 source kernel/Kconfig.preempt
302
303 config HZ
304 int
305 default 100
306
307 config ARCH_HAS_HOLES_MEMORYMODEL
308 def_bool y if SPARSEMEM
309
310 config ARCH_SPARSEMEM_ENABLE
311 def_bool y
312 select SPARSEMEM_VMEMMAP_ENABLE
313
314 config ARCH_SPARSEMEM_DEFAULT
315 def_bool ARCH_SPARSEMEM_ENABLE
316
317 config ARCH_SELECT_MEMORY_MODEL
318 def_bool ARCH_SPARSEMEM_ENABLE
319
320 config HAVE_ARCH_PFN_VALID
321 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
322
323 config HW_PERF_EVENTS
324 bool "Enable hardware performance counter support for perf events"
325 depends on PERF_EVENTS
326 default y
327 help
328 Enable hardware performance counter support for perf events. If
329 disabled, perf events will use software events only.
330
331 config SYS_SUPPORTS_HUGETLBFS
332 def_bool y
333
334 config ARCH_WANT_GENERAL_HUGETLB
335 def_bool y
336
337 config ARCH_WANT_HUGE_PMD_SHARE
338 def_bool y if !ARM64_64K_PAGES
339
340 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
341 def_bool y
342
343 config ARCH_HAS_CACHE_LINE_SIZE
344 def_bool y
345
346 source "mm/Kconfig"
347
348 config XEN_DOM0
349 def_bool y
350 depends on XEN
351
352 config XEN
353 bool "Xen guest support on ARM64"
354 depends on ARM64 && OF
355 select SWIOTLB_XEN
356 help
357 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
358
359 config FORCE_MAX_ZONEORDER
360 int
361 default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
362 default "11"
363
364 endmenu
365
366 menu "Boot options"
367
368 config CMDLINE
369 string "Default kernel command string"
370 default ""
371 help
372 Provide a set of default command-line options at build time by
373 entering them here. As a minimum, you should specify the the
374 root device (e.g. root=/dev/nfs).
375
376 config CMDLINE_FORCE
377 bool "Always use the default kernel command string"
378 help
379 Always use the default kernel command string, even if the boot
380 loader passes other arguments to the kernel.
381 This is useful if you cannot or don't want to change the
382 command-line options your boot loader passes to the kernel.
383
384 config EFI_STUB
385 bool
386
387 config EFI
388 bool "UEFI runtime support"
389 depends on OF && !CPU_BIG_ENDIAN
390 select LIBFDT
391 select UCS2_STRING
392 select EFI_PARAMS_FROM_FDT
393 select EFI_RUNTIME_WRAPPERS
394 select EFI_STUB
395 select EFI_ARMSTUB
396 default y
397 help
398 This option provides support for runtime services provided
399 by UEFI firmware (such as non-volatile variables, realtime
400 clock, and platform reset). A UEFI stub is also provided to
401 allow the kernel to be booted as an EFI application. This
402 is only useful on systems that have UEFI firmware.
403
404 endmenu
405
406 menu "Userspace binary formats"
407
408 source "fs/Kconfig.binfmt"
409
410 config COMPAT
411 bool "Kernel support for 32-bit EL0"
412 depends on !ARM64_64K_PAGES
413 select COMPAT_BINFMT_ELF
414 select HAVE_UID16
415 select OLD_SIGSUSPEND3
416 select COMPAT_OLD_SIGACTION
417 help
418 This option enables support for a 32-bit EL0 running under a 64-bit
419 kernel at EL1. AArch32-specific components such as system calls,
420 the user helper functions, VFP support and the ptrace interface are
421 handled appropriately by the kernel.
422
423 If you want to execute 32-bit userspace applications, say Y.
424
425 config SYSVIPC_COMPAT
426 def_bool y
427 depends on COMPAT && SYSVIPC
428
429 endmenu
430
431 menu "Power management options"
432
433 source "kernel/power/Kconfig"
434
435 config ARCH_SUSPEND_POSSIBLE
436 def_bool y
437
438 config ARM64_CPU_SUSPEND
439 def_bool PM_SLEEP
440
441 endmenu
442
443 menu "CPU Power Management"
444
445 source "drivers/cpuidle/Kconfig"
446
447 source "drivers/cpufreq/Kconfig"
448
449 endmenu
450
451 source "net/Kconfig"
452
453 source "drivers/Kconfig"
454
455 source "drivers/firmware/Kconfig"
456
457 source "fs/Kconfig"
458
459 source "arch/arm64/kvm/Kconfig"
460
461 source "arch/arm64/Kconfig.debug"
462
463 source "security/Kconfig"
464
465 source "crypto/Kconfig"
466 if CRYPTO
467 source "arch/arm64/crypto/Kconfig"
468 endif
469
470 source "lib/Kconfig"
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