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