Commit | Line | Data |
---|---|---|
8c2c3df3 CM |
1 | config ARM64 |
2 | def_bool y | |
92980405 | 3 | select ARCH_BINFMT_ELF_RANDOMIZE_PIE |
8c2c3df3 | 4 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
957e3fac | 5 | select ARCH_HAS_GCOV_PROFILE_ALL |
308c09f1 | 6 | select ARCH_HAS_SG_CHAIN |
1f85008e | 7 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
c63c8700 | 8 | select ARCH_USE_CMPXCHG_LOCKREF |
4badad35 | 9 | select ARCH_SUPPORTS_ATOMIC_RMW |
9170100e | 10 | select ARCH_WANT_OPTIONAL_GPIOLIB |
6212a512 | 11 | select ARCH_WANT_COMPAT_IPC_PARSE_VERSION |
b6f35981 | 12 | select ARCH_WANT_FRAME_POINTERS |
25c92a37 | 13 | select ARM_AMBA |
1aee5d7a | 14 | select ARM_ARCH_TIMER |
c4188edc | 15 | select ARM_GIC |
875cbf3e | 16 | select AUDIT_ARCH_COMPAT_GENERIC |
021f6537 | 17 | select ARM_GIC_V3 |
adace895 | 18 | select BUILDTIME_EXTABLE_SORT |
db2789b5 | 19 | select CLONE_BACKWARDS |
7ca2ef33 | 20 | select COMMON_CLK |
166936ba | 21 | select CPU_PM if (SUSPEND || CPU_IDLE) |
7bc13fd3 | 22 | select DCACHE_WORD_ACCESS |
d4932f9e | 23 | select GENERIC_ALLOCATOR |
8c2c3df3 | 24 | select GENERIC_CLOCKEVENTS |
1f85008e | 25 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
3be1a5c4 | 26 | select GENERIC_CPU_AUTOPROBE |
bf4b558e | 27 | select GENERIC_EARLY_IOREMAP |
8c2c3df3 CM |
28 | select GENERIC_IRQ_PROBE |
29 | select GENERIC_IRQ_SHOW | |
cb61f676 | 30 | select GENERIC_PCI_IOMAP |
65cd4f6c | 31 | select GENERIC_SCHED_CLOCK |
8c2c3df3 | 32 | select GENERIC_SMP_IDLE_THREAD |
12a0ef7b WD |
33 | select GENERIC_STRNCPY_FROM_USER |
34 | select GENERIC_STRNLEN_USER | |
8c2c3df3 | 35 | select GENERIC_TIME_VSYSCALL |
a1ddc74a | 36 | select HANDLE_DOMAIN_IRQ |
8c2c3df3 | 37 | select HARDIRQS_SW_RESEND |
5284e1b4 | 38 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
875cbf3e | 39 | select HAVE_ARCH_AUDITSYSCALL |
9732cafd | 40 | select HAVE_ARCH_JUMP_LABEL |
9529247d | 41 | select HAVE_ARCH_KGDB |
a1ae65b2 | 42 | select HAVE_ARCH_SECCOMP_FILTER |
8c2c3df3 | 43 | select HAVE_ARCH_TRACEHOOK |
e54bcde3 | 44 | select HAVE_BPF_JIT |
af64d2aa | 45 | select HAVE_C_RECORDMCOUNT |
c0c264ae | 46 | select HAVE_CC_STACKPROTECTOR |
5284e1b4 | 47 | select HAVE_CMPXCHG_DOUBLE |
9b2a60c4 | 48 | select HAVE_DEBUG_BUGVERBOSE |
b69ec42b | 49 | select HAVE_DEBUG_KMEMLEAK |
8c2c3df3 CM |
50 | select HAVE_DMA_API_DEBUG |
51 | select HAVE_DMA_ATTRS | |
6ac2104d | 52 | select HAVE_DMA_CONTIGUOUS |
bd7d38db | 53 | select HAVE_DYNAMIC_FTRACE |
50afc33a | 54 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
af64d2aa | 55 | select HAVE_FTRACE_MCOUNT_RECORD |
819e50e2 AT |
56 | select HAVE_FUNCTION_TRACER |
57 | select HAVE_FUNCTION_GRAPH_TRACER | |
8c2c3df3 | 58 | select HAVE_GENERIC_DMA_COHERENT |
8c2c3df3 | 59 | select HAVE_HW_BREAKPOINT if PERF_EVENTS |
8c2c3df3 | 60 | select HAVE_MEMBLOCK |
55834a77 | 61 | select HAVE_PATA_PLATFORM |
8c2c3df3 | 62 | select HAVE_PERF_EVENTS |
2ee0d7fd JP |
63 | select HAVE_PERF_REGS |
64 | select HAVE_PERF_USER_STACK_DUMP | |
5e5f6dc1 | 65 | select HAVE_RCU_TABLE_FREE |
055b1212 | 66 | select HAVE_SYSCALL_TRACEPOINTS |
8c2c3df3 | 67 | select IRQ_DOMAIN |
fea2acaa | 68 | select MODULES_USE_ELF_RELA |
8c2c3df3 CM |
69 | select NO_BOOTMEM |
70 | select OF | |
71 | select OF_EARLY_FLATTREE | |
9bf14b7c | 72 | select OF_RESERVED_MEM |
8c2c3df3 | 73 | select PERF_USE_VMALLOC |
aa1e8ec1 CM |
74 | select POWER_RESET |
75 | select POWER_SUPPLY | |
8c2c3df3 CM |
76 | select RTC_LIB |
77 | select SPARSE_IRQ | |
7ac57a89 | 78 | select SYSCTL_EXCEPTION_TRACE |
6c81fe79 | 79 | select HAVE_CONTEXT_TRACKING |
8c2c3df3 CM |
80 | help |
81 | ARM 64-bit (AArch64) Linux support. | |
82 | ||
83 | config 64BIT | |
84 | def_bool y | |
85 | ||
86 | config ARCH_PHYS_ADDR_T_64BIT | |
87 | def_bool y | |
88 | ||
89 | config MMU | |
90 | def_bool y | |
91 | ||
ce816fa8 | 92 | config NO_IOPORT_MAP |
d1e6dc91 | 93 | def_bool y if !PCI |
8c2c3df3 CM |
94 | |
95 | config STACKTRACE_SUPPORT | |
96 | def_bool y | |
97 | ||
98 | config LOCKDEP_SUPPORT | |
99 | def_bool y | |
100 | ||
101 | config TRACE_IRQFLAGS_SUPPORT | |
102 | def_bool y | |
103 | ||
c209f799 | 104 | config RWSEM_XCHGADD_ALGORITHM |
8c2c3df3 CM |
105 | def_bool y |
106 | ||
107 | config GENERIC_HWEIGHT | |
108 | def_bool y | |
109 | ||
110 | config GENERIC_CSUM | |
111 | def_bool y | |
112 | ||
113 | config GENERIC_CALIBRATE_DELAY | |
114 | def_bool y | |
115 | ||
19e7640d | 116 | config ZONE_DMA |
8c2c3df3 CM |
117 | def_bool y |
118 | ||
29e56940 SC |
119 | config HAVE_GENERIC_RCU_GUP |
120 | def_bool y | |
121 | ||
8c2c3df3 CM |
122 | config ARCH_DMA_ADDR_T_64BIT |
123 | def_bool y | |
124 | ||
125 | config NEED_DMA_MAP_STATE | |
126 | def_bool y | |
127 | ||
128 | config NEED_SG_DMA_LENGTH | |
129 | def_bool y | |
130 | ||
131 | config SWIOTLB | |
132 | def_bool y | |
133 | ||
134 | config IOMMU_HELPER | |
135 | def_bool SWIOTLB | |
136 | ||
4cfb3613 AB |
137 | config KERNEL_MODE_NEON |
138 | def_bool y | |
139 | ||
92cc15fc RH |
140 | config FIX_EARLYCON_MEM |
141 | def_bool y | |
142 | ||
8c2c3df3 CM |
143 | source "init/Kconfig" |
144 | ||
145 | source "kernel/Kconfig.freezer" | |
146 | ||
1ae90e79 CM |
147 | menu "Platform selection" |
148 | ||
41904360 SS |
149 | config ARCH_SEATTLE |
150 | bool "AMD Seattle SoC Family" | |
151 | help | |
152 | This enables support for AMD Seattle SOC Family | |
153 | ||
28f7420d RMC |
154 | config ARCH_THUNDER |
155 | bool "Cavium Inc. Thunder SoC Family" | |
156 | help | |
157 | This enables support for Cavium's Thunder Family of SoCs. | |
158 | ||
1ae90e79 CM |
159 | config ARCH_VEXPRESS |
160 | bool "ARMv8 software model (Versatile Express)" | |
161 | select ARCH_REQUIRE_GPIOLIB | |
162 | select COMMON_CLK_VERSATILE | |
aa1e8ec1 | 163 | select POWER_RESET_VEXPRESS |
1ae90e79 CM |
164 | select VEXPRESS_CONFIG |
165 | help | |
166 | This enables support for the ARMv8 software model (Versatile | |
167 | Express). | |
8c2c3df3 | 168 | |
15942853 VK |
169 | config ARCH_XGENE |
170 | bool "AppliedMicro X-Gene SOC Family" | |
171 | help | |
172 | This enables support for AppliedMicro X-Gene SOC Family | |
173 | ||
8c2c3df3 CM |
174 | endmenu |
175 | ||
176 | menu "Bus support" | |
177 | ||
d1e6dc91 LD |
178 | config PCI |
179 | bool "PCI support" | |
180 | help | |
181 | This feature enables support for PCI bus system. If you say Y | |
182 | here, the kernel will include drivers and infrastructure code | |
183 | to support PCI bus devices. | |
184 | ||
185 | config PCI_DOMAINS | |
186 | def_bool PCI | |
187 | ||
188 | config PCI_DOMAINS_GENERIC | |
189 | def_bool PCI | |
190 | ||
191 | config PCI_SYSCALL | |
192 | def_bool PCI | |
193 | ||
194 | source "drivers/pci/Kconfig" | |
195 | source "drivers/pci/pcie/Kconfig" | |
196 | source "drivers/pci/hotplug/Kconfig" | |
197 | ||
8c2c3df3 CM |
198 | endmenu |
199 | ||
200 | menu "Kernel Features" | |
201 | ||
c0a01b84 AP |
202 | menu "ARM errata workarounds via the alternatives framework" |
203 | ||
204 | config ARM64_ERRATUM_826319 | |
205 | bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted" | |
206 | default y | |
207 | help | |
208 | This option adds an alternative code sequence to work around ARM | |
209 | erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or | |
210 | AXI master interface and an L2 cache. | |
211 | ||
212 | If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors | |
213 | and is unable to accept a certain write via this interface, it will | |
214 | not progress on read data presented on the read data channel and the | |
215 | system can deadlock. | |
216 | ||
217 | The workaround promotes data cache clean instructions to | |
218 | data cache clean-and-invalidate. | |
219 | Please note that this does not necessarily enable the workaround, | |
220 | as it depends on the alternative framework, which will only patch | |
221 | the kernel if an affected CPU is detected. | |
222 | ||
223 | If unsure, say Y. | |
224 | ||
225 | config ARM64_ERRATUM_827319 | |
226 | bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect" | |
227 | default y | |
228 | help | |
229 | This option adds an alternative code sequence to work around ARM | |
230 | erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI | |
231 | master interface and an L2 cache. | |
232 | ||
233 | Under certain conditions this erratum can cause a clean line eviction | |
234 | to occur at the same time as another transaction to the same address | |
235 | on the AMBA 5 CHI interface, which can cause data corruption if the | |
236 | interconnect reorders the two transactions. | |
237 | ||
238 | The workaround promotes data cache clean instructions to | |
239 | data cache clean-and-invalidate. | |
240 | Please note that this does not necessarily enable the workaround, | |
241 | as it depends on the alternative framework, which will only patch | |
242 | the kernel if an affected CPU is detected. | |
243 | ||
244 | If unsure, say Y. | |
245 | ||
246 | config ARM64_ERRATUM_824069 | |
247 | bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop" | |
248 | default y | |
249 | help | |
250 | This option adds an alternative code sequence to work around ARM | |
251 | erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected | |
252 | to a coherent interconnect. | |
253 | ||
254 | If a Cortex-A53 processor is executing a store or prefetch for | |
255 | write instruction at the same time as a processor in another | |
256 | cluster is executing a cache maintenance operation to the same | |
257 | address, then this erratum might cause a clean cache line to be | |
258 | incorrectly marked as dirty. | |
259 | ||
260 | The workaround promotes data cache clean instructions to | |
261 | data cache clean-and-invalidate. | |
262 | Please note that this option does not necessarily enable the | |
263 | workaround, as it depends on the alternative framework, which will | |
264 | only patch the kernel if an affected CPU is detected. | |
265 | ||
266 | If unsure, say Y. | |
267 | ||
268 | config ARM64_ERRATUM_819472 | |
269 | bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption" | |
270 | default y | |
271 | help | |
272 | This option adds an alternative code sequence to work around ARM | |
273 | erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache | |
274 | present when it is connected to a coherent interconnect. | |
275 | ||
276 | If the processor is executing a load and store exclusive sequence at | |
277 | the same time as a processor in another cluster is executing a cache | |
278 | maintenance operation to the same address, then this erratum might | |
279 | cause data corruption. | |
280 | ||
281 | The workaround promotes data cache clean instructions to | |
282 | data cache clean-and-invalidate. | |
283 | Please note that this does not necessarily enable the workaround, | |
284 | as it depends on the alternative framework, which will only patch | |
285 | the kernel if an affected CPU is detected. | |
286 | ||
287 | If unsure, say Y. | |
288 | ||
289 | config ARM64_ERRATUM_832075 | |
290 | bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads" | |
291 | default y | |
292 | help | |
293 | This option adds an alternative code sequence to work around ARM | |
294 | erratum 832075 on Cortex-A57 parts up to r1p2. | |
295 | ||
296 | Affected Cortex-A57 parts might deadlock when exclusive load/store | |
297 | instructions to Write-Back memory are mixed with Device loads. | |
298 | ||
299 | The workaround is to promote device loads to use Load-Acquire | |
300 | semantics. | |
301 | Please note that this does not necessarily enable the workaround, | |
302 | as it depends on the alternative framework, which will only patch | |
303 | the kernel if an affected CPU is detected. | |
304 | ||
305 | If unsure, say Y. | |
306 | ||
307 | endmenu | |
308 | ||
309 | ||
e41ceed0 JL |
310 | choice |
311 | prompt "Page size" | |
312 | default ARM64_4K_PAGES | |
313 | help | |
314 | Page size (translation granule) configuration. | |
315 | ||
316 | config ARM64_4K_PAGES | |
317 | bool "4KB" | |
318 | help | |
319 | This feature enables 4KB pages support. | |
320 | ||
8c2c3df3 | 321 | config ARM64_64K_PAGES |
e41ceed0 | 322 | bool "64KB" |
8c2c3df3 CM |
323 | help |
324 | This feature enables 64KB pages support (4KB by default) | |
325 | allowing only two levels of page tables and faster TLB | |
326 | look-up. AArch32 emulation is not available when this feature | |
327 | is enabled. | |
328 | ||
e41ceed0 JL |
329 | endchoice |
330 | ||
331 | choice | |
332 | prompt "Virtual address space size" | |
333 | default ARM64_VA_BITS_39 if ARM64_4K_PAGES | |
334 | default ARM64_VA_BITS_42 if ARM64_64K_PAGES | |
335 | help | |
336 | Allows choosing one of multiple possible virtual address | |
337 | space sizes. The level of translation table is determined by | |
338 | a combination of page size and virtual address space size. | |
339 | ||
340 | config ARM64_VA_BITS_39 | |
341 | bool "39-bit" | |
342 | depends on ARM64_4K_PAGES | |
343 | ||
344 | config ARM64_VA_BITS_42 | |
345 | bool "42-bit" | |
346 | depends on ARM64_64K_PAGES | |
347 | ||
c79b954b JL |
348 | config ARM64_VA_BITS_48 |
349 | bool "48-bit" | |
04f905a9 | 350 | depends on !ARM_SMMU |
c79b954b | 351 | |
e41ceed0 JL |
352 | endchoice |
353 | ||
354 | config ARM64_VA_BITS | |
355 | int | |
356 | default 39 if ARM64_VA_BITS_39 | |
357 | default 42 if ARM64_VA_BITS_42 | |
c79b954b | 358 | default 48 if ARM64_VA_BITS_48 |
e41ceed0 | 359 | |
abe669d7 CM |
360 | config ARM64_PGTABLE_LEVELS |
361 | int | |
362 | default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42 | |
383c2799 | 363 | default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48 |
abe669d7 CM |
364 | default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39 |
365 | default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48 | |
c79b954b | 366 | |
a872013d WD |
367 | config CPU_BIG_ENDIAN |
368 | bool "Build big-endian kernel" | |
369 | help | |
370 | Say Y if you plan on running a kernel in big-endian mode. | |
371 | ||
8c2c3df3 CM |
372 | config SMP |
373 | bool "Symmetric Multi-Processing" | |
8c2c3df3 CM |
374 | help |
375 | This enables support for systems with more than one CPU. If | |
376 | you say N here, the kernel will run on single and | |
377 | multiprocessor machines, but will use only one CPU of a | |
378 | multiprocessor machine. If you say Y here, the kernel will run | |
379 | on many, but not all, single processor machines. On a single | |
380 | processor machine, the kernel will run faster if you say N | |
381 | here. | |
382 | ||
383 | If you don't know what to do here, say N. | |
384 | ||
f6e763b9 MB |
385 | config SCHED_MC |
386 | bool "Multi-core scheduler support" | |
387 | depends on SMP | |
388 | help | |
389 | Multi-core scheduler support improves the CPU scheduler's decision | |
390 | making when dealing with multi-core CPU chips at a cost of slightly | |
391 | increased overhead in some places. If unsure say N here. | |
392 | ||
393 | config SCHED_SMT | |
394 | bool "SMT scheduler support" | |
395 | depends on SMP | |
396 | help | |
397 | Improves the CPU scheduler's decision making when dealing with | |
398 | MultiThreading at a cost of slightly increased overhead in some | |
399 | places. If unsure say N here. | |
400 | ||
8c2c3df3 | 401 | config NR_CPUS |
e3672649 RR |
402 | int "Maximum number of CPUs (2-64)" |
403 | range 2 64 | |
8c2c3df3 | 404 | depends on SMP |
15942853 | 405 | # These have to remain sorted largest to smallest |
e3672649 | 406 | default "64" |
8c2c3df3 | 407 | |
9327e2c6 MR |
408 | config HOTPLUG_CPU |
409 | bool "Support for hot-pluggable CPUs" | |
410 | depends on SMP | |
411 | help | |
412 | Say Y here to experiment with turning CPUs off and on. CPUs | |
413 | can be controlled through /sys/devices/system/cpu. | |
414 | ||
8c2c3df3 CM |
415 | source kernel/Kconfig.preempt |
416 | ||
417 | config HZ | |
418 | int | |
419 | default 100 | |
420 | ||
421 | config ARCH_HAS_HOLES_MEMORYMODEL | |
422 | def_bool y if SPARSEMEM | |
423 | ||
424 | config ARCH_SPARSEMEM_ENABLE | |
425 | def_bool y | |
426 | select SPARSEMEM_VMEMMAP_ENABLE | |
427 | ||
428 | config ARCH_SPARSEMEM_DEFAULT | |
429 | def_bool ARCH_SPARSEMEM_ENABLE | |
430 | ||
431 | config ARCH_SELECT_MEMORY_MODEL | |
432 | def_bool ARCH_SPARSEMEM_ENABLE | |
433 | ||
434 | config HAVE_ARCH_PFN_VALID | |
435 | def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM | |
436 | ||
437 | config HW_PERF_EVENTS | |
438 | bool "Enable hardware performance counter support for perf events" | |
439 | depends on PERF_EVENTS | |
440 | default y | |
441 | help | |
442 | Enable hardware performance counter support for perf events. If | |
443 | disabled, perf events will use software events only. | |
444 | ||
084bd298 SC |
445 | config SYS_SUPPORTS_HUGETLBFS |
446 | def_bool y | |
447 | ||
448 | config ARCH_WANT_GENERAL_HUGETLB | |
449 | def_bool y | |
450 | ||
451 | config ARCH_WANT_HUGE_PMD_SHARE | |
452 | def_bool y if !ARM64_64K_PAGES | |
453 | ||
af074848 SC |
454 | config HAVE_ARCH_TRANSPARENT_HUGEPAGE |
455 | def_bool y | |
456 | ||
a41dc0e8 CM |
457 | config ARCH_HAS_CACHE_LINE_SIZE |
458 | def_bool y | |
459 | ||
8c2c3df3 CM |
460 | source "mm/Kconfig" |
461 | ||
a1ae65b2 AT |
462 | config SECCOMP |
463 | bool "Enable seccomp to safely compute untrusted bytecode" | |
464 | ---help--- | |
465 | This kernel feature is useful for number crunching applications | |
466 | that may need to compute untrusted bytecode during their | |
467 | execution. By using pipes or other transports made available to | |
468 | the process as file descriptors supporting the read/write | |
469 | syscalls, it's possible to isolate those applications in | |
470 | their own address space using seccomp. Once seccomp is | |
471 | enabled via prctl(PR_SET_SECCOMP), it cannot be disabled | |
472 | and the task is only allowed to execute a few safe syscalls | |
473 | defined by each seccomp mode. | |
474 | ||
aa42aa13 SS |
475 | config XEN_DOM0 |
476 | def_bool y | |
477 | depends on XEN | |
478 | ||
479 | config XEN | |
c2ba1f7d | 480 | bool "Xen guest support on ARM64" |
aa42aa13 | 481 | depends on ARM64 && OF |
83862ccf | 482 | select SWIOTLB_XEN |
aa42aa13 SS |
483 | help |
484 | Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. | |
485 | ||
d03bb145 SC |
486 | config FORCE_MAX_ZONEORDER |
487 | int | |
488 | default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) | |
489 | default "11" | |
490 | ||
1b907f46 WD |
491 | menuconfig ARMV8_DEPRECATED |
492 | bool "Emulate deprecated/obsolete ARMv8 instructions" | |
493 | depends on COMPAT | |
494 | help | |
495 | Legacy software support may require certain instructions | |
496 | that have been deprecated or obsoleted in the architecture. | |
497 | ||
498 | Enable this config to enable selective emulation of these | |
499 | features. | |
500 | ||
501 | If unsure, say Y | |
502 | ||
503 | if ARMV8_DEPRECATED | |
504 | ||
505 | config SWP_EMULATION | |
506 | bool "Emulate SWP/SWPB instructions" | |
507 | help | |
508 | ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that | |
509 | they are always undefined. Say Y here to enable software | |
510 | emulation of these instructions for userspace using LDXR/STXR. | |
511 | ||
512 | In some older versions of glibc [<=2.8] SWP is used during futex | |
513 | trylock() operations with the assumption that the code will not | |
514 | be preempted. This invalid assumption may be more likely to fail | |
515 | with SWP emulation enabled, leading to deadlock of the user | |
516 | application. | |
517 | ||
518 | NOTE: when accessing uncached shared regions, LDXR/STXR rely | |
519 | on an external transaction monitoring block called a global | |
520 | monitor to maintain update atomicity. If your system does not | |
521 | implement a global monitor, this option can cause programs that | |
522 | perform SWP operations to uncached memory to deadlock. | |
523 | ||
524 | If unsure, say Y | |
525 | ||
526 | config CP15_BARRIER_EMULATION | |
527 | bool "Emulate CP15 Barrier instructions" | |
528 | help | |
529 | The CP15 barrier instructions - CP15ISB, CP15DSB, and | |
530 | CP15DMB - are deprecated in ARMv8 (and ARMv7). It is | |
531 | strongly recommended to use the ISB, DSB, and DMB | |
532 | instructions instead. | |
533 | ||
534 | Say Y here to enable software emulation of these | |
535 | instructions for AArch32 userspace code. When this option is | |
536 | enabled, CP15 barrier usage is traced which can help | |
537 | identify software that needs updating. | |
538 | ||
539 | If unsure, say Y | |
540 | ||
541 | endif | |
542 | ||
8c2c3df3 CM |
543 | endmenu |
544 | ||
545 | menu "Boot options" | |
546 | ||
547 | config CMDLINE | |
548 | string "Default kernel command string" | |
549 | default "" | |
550 | help | |
551 | Provide a set of default command-line options at build time by | |
552 | entering them here. As a minimum, you should specify the the | |
553 | root device (e.g. root=/dev/nfs). | |
554 | ||
555 | config CMDLINE_FORCE | |
556 | bool "Always use the default kernel command string" | |
557 | help | |
558 | Always use the default kernel command string, even if the boot | |
559 | loader passes other arguments to the kernel. | |
560 | This is useful if you cannot or don't want to change the | |
561 | command-line options your boot loader passes to the kernel. | |
562 | ||
f4f75ad5 AB |
563 | config EFI_STUB |
564 | bool | |
565 | ||
f84d0275 MS |
566 | config EFI |
567 | bool "UEFI runtime support" | |
568 | depends on OF && !CPU_BIG_ENDIAN | |
569 | select LIBFDT | |
570 | select UCS2_STRING | |
571 | select EFI_PARAMS_FROM_FDT | |
e15dd494 | 572 | select EFI_RUNTIME_WRAPPERS |
f4f75ad5 AB |
573 | select EFI_STUB |
574 | select EFI_ARMSTUB | |
f84d0275 MS |
575 | default y |
576 | help | |
577 | This option provides support for runtime services provided | |
578 | by UEFI firmware (such as non-volatile variables, realtime | |
3c7f2550 MS |
579 | clock, and platform reset). A UEFI stub is also provided to |
580 | allow the kernel to be booted as an EFI application. This | |
581 | is only useful on systems that have UEFI firmware. | |
f84d0275 | 582 | |
d1ae8c00 YL |
583 | config DMI |
584 | bool "Enable support for SMBIOS (DMI) tables" | |
585 | depends on EFI | |
586 | default y | |
587 | help | |
588 | This enables SMBIOS/DMI feature for systems. | |
589 | ||
590 | This option is only useful on systems that have UEFI firmware. | |
591 | However, even with this option, the resultant kernel should | |
592 | continue to boot on existing non-UEFI platforms. | |
593 | ||
8c2c3df3 CM |
594 | endmenu |
595 | ||
596 | menu "Userspace binary formats" | |
597 | ||
598 | source "fs/Kconfig.binfmt" | |
599 | ||
600 | config COMPAT | |
601 | bool "Kernel support for 32-bit EL0" | |
602 | depends on !ARM64_64K_PAGES | |
603 | select COMPAT_BINFMT_ELF | |
af1839eb | 604 | select HAVE_UID16 |
84b9e9b4 | 605 | select OLD_SIGSUSPEND3 |
51682036 | 606 | select COMPAT_OLD_SIGACTION |
8c2c3df3 CM |
607 | help |
608 | This option enables support for a 32-bit EL0 running under a 64-bit | |
609 | kernel at EL1. AArch32-specific components such as system calls, | |
610 | the user helper functions, VFP support and the ptrace interface are | |
611 | handled appropriately by the kernel. | |
612 | ||
613 | If you want to execute 32-bit userspace applications, say Y. | |
614 | ||
615 | config SYSVIPC_COMPAT | |
616 | def_bool y | |
617 | depends on COMPAT && SYSVIPC | |
618 | ||
619 | endmenu | |
620 | ||
166936ba LP |
621 | menu "Power management options" |
622 | ||
623 | source "kernel/power/Kconfig" | |
624 | ||
625 | config ARCH_SUSPEND_POSSIBLE | |
626 | def_bool y | |
627 | ||
628 | config ARM64_CPU_SUSPEND | |
629 | def_bool PM_SLEEP | |
630 | ||
631 | endmenu | |
632 | ||
1307220d LP |
633 | menu "CPU Power Management" |
634 | ||
635 | source "drivers/cpuidle/Kconfig" | |
636 | ||
52e7e816 RH |
637 | source "drivers/cpufreq/Kconfig" |
638 | ||
639 | endmenu | |
640 | ||
8c2c3df3 CM |
641 | source "net/Kconfig" |
642 | ||
643 | source "drivers/Kconfig" | |
644 | ||
f84d0275 MS |
645 | source "drivers/firmware/Kconfig" |
646 | ||
8c2c3df3 CM |
647 | source "fs/Kconfig" |
648 | ||
c3eb5b14 MZ |
649 | source "arch/arm64/kvm/Kconfig" |
650 | ||
8c2c3df3 CM |
651 | source "arch/arm64/Kconfig.debug" |
652 | ||
653 | source "security/Kconfig" | |
654 | ||
655 | source "crypto/Kconfig" | |
2c98833a AB |
656 | if CRYPTO |
657 | source "arch/arm64/crypto/Kconfig" | |
658 | endif | |
8c2c3df3 CM |
659 | |
660 | source "lib/Kconfig" |