Commit | Line | Data |
---|---|---|
8c2c3df3 CM |
1 | config ARM64 |
2 | def_bool y | |
b6197b93 | 3 | select ACPI_CCA_REQUIRED if ACPI |
d8f4f161 | 4 | select ACPI_GENERIC_GSI if ACPI |
6933de0c | 5 | select ACPI_REDUCED_HARDWARE_ONLY if ACPI |
8c2c3df3 | 6 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
2b68f6ca | 7 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 8 | select ARCH_HAS_GCOV_PROFILE_ALL |
308c09f1 | 9 | select ARCH_HAS_SG_CHAIN |
1f85008e | 10 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
c63c8700 | 11 | select ARCH_USE_CMPXCHG_LOCKREF |
4badad35 | 12 | select ARCH_SUPPORTS_ATOMIC_RMW |
9170100e | 13 | select ARCH_WANT_OPTIONAL_GPIOLIB |
6212a512 | 14 | select ARCH_WANT_COMPAT_IPC_PARSE_VERSION |
b6f35981 | 15 | select ARCH_WANT_FRAME_POINTERS |
25c92a37 | 16 | select ARM_AMBA |
1aee5d7a | 17 | select ARM_ARCH_TIMER |
c4188edc | 18 | select ARM_GIC |
875cbf3e | 19 | select AUDIT_ARCH_COMPAT_GENERIC |
853a33ce | 20 | select ARM_GIC_V2M if PCI_MSI |
021f6537 | 21 | select ARM_GIC_V3 |
19812729 | 22 | select ARM_GIC_V3_ITS if PCI_MSI |
adace895 | 23 | select BUILDTIME_EXTABLE_SORT |
db2789b5 | 24 | select CLONE_BACKWARDS |
7ca2ef33 | 25 | select COMMON_CLK |
166936ba | 26 | select CPU_PM if (SUSPEND || CPU_IDLE) |
7bc13fd3 | 27 | select DCACHE_WORD_ACCESS |
ef37566c | 28 | select EDAC_SUPPORT |
d4932f9e | 29 | select GENERIC_ALLOCATOR |
8c2c3df3 | 30 | select GENERIC_CLOCKEVENTS |
4b3dc967 | 31 | select GENERIC_CLOCKEVENTS_BROADCAST |
3be1a5c4 | 32 | select GENERIC_CPU_AUTOPROBE |
bf4b558e | 33 | select GENERIC_EARLY_IOREMAP |
8c2c3df3 CM |
34 | select GENERIC_IRQ_PROBE |
35 | select GENERIC_IRQ_SHOW | |
6544e67b | 36 | select GENERIC_IRQ_SHOW_LEVEL |
cb61f676 | 37 | select GENERIC_PCI_IOMAP |
65cd4f6c | 38 | select GENERIC_SCHED_CLOCK |
8c2c3df3 | 39 | select GENERIC_SMP_IDLE_THREAD |
12a0ef7b WD |
40 | select GENERIC_STRNCPY_FROM_USER |
41 | select GENERIC_STRNLEN_USER | |
8c2c3df3 | 42 | select GENERIC_TIME_VSYSCALL |
a1ddc74a | 43 | select HANDLE_DOMAIN_IRQ |
8c2c3df3 | 44 | select HARDIRQS_SW_RESEND |
5284e1b4 | 45 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
875cbf3e | 46 | select HAVE_ARCH_AUDITSYSCALL |
8e7a4cef | 47 | select HAVE_ARCH_BITREVERSE |
9732cafd | 48 | select HAVE_ARCH_JUMP_LABEL |
9529247d | 49 | select HAVE_ARCH_KGDB |
a1ae65b2 | 50 | select HAVE_ARCH_SECCOMP_FILTER |
8c2c3df3 | 51 | select HAVE_ARCH_TRACEHOOK |
e54bcde3 | 52 | select HAVE_BPF_JIT |
af64d2aa | 53 | select HAVE_C_RECORDMCOUNT |
c0c264ae | 54 | select HAVE_CC_STACKPROTECTOR |
5284e1b4 | 55 | select HAVE_CMPXCHG_DOUBLE |
95eff6b2 | 56 | select HAVE_CMPXCHG_LOCAL |
9b2a60c4 | 57 | select HAVE_DEBUG_BUGVERBOSE |
b69ec42b | 58 | select HAVE_DEBUG_KMEMLEAK |
8c2c3df3 CM |
59 | select HAVE_DMA_API_DEBUG |
60 | select HAVE_DMA_ATTRS | |
6ac2104d | 61 | select HAVE_DMA_CONTIGUOUS |
bd7d38db | 62 | select HAVE_DYNAMIC_FTRACE |
50afc33a | 63 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
af64d2aa | 64 | select HAVE_FTRACE_MCOUNT_RECORD |
819e50e2 AT |
65 | select HAVE_FUNCTION_TRACER |
66 | select HAVE_FUNCTION_GRAPH_TRACER | |
8c2c3df3 | 67 | select HAVE_GENERIC_DMA_COHERENT |
8c2c3df3 | 68 | select HAVE_HW_BREAKPOINT if PERF_EVENTS |
8c2c3df3 | 69 | select HAVE_MEMBLOCK |
55834a77 | 70 | select HAVE_PATA_PLATFORM |
8c2c3df3 | 71 | select HAVE_PERF_EVENTS |
2ee0d7fd JP |
72 | select HAVE_PERF_REGS |
73 | select HAVE_PERF_USER_STACK_DUMP | |
5e5f6dc1 | 74 | select HAVE_RCU_TABLE_FREE |
055b1212 | 75 | select HAVE_SYSCALL_TRACEPOINTS |
8c2c3df3 | 76 | select IRQ_DOMAIN |
e8557d1f | 77 | select IRQ_FORCED_THREADING |
fea2acaa | 78 | select MODULES_USE_ELF_RELA |
8c2c3df3 CM |
79 | select NO_BOOTMEM |
80 | select OF | |
81 | select OF_EARLY_FLATTREE | |
9bf14b7c | 82 | select OF_RESERVED_MEM |
8c2c3df3 | 83 | select PERF_USE_VMALLOC |
aa1e8ec1 CM |
84 | select POWER_RESET |
85 | select POWER_SUPPLY | |
8c2c3df3 CM |
86 | select RTC_LIB |
87 | select SPARSE_IRQ | |
7ac57a89 | 88 | select SYSCTL_EXCEPTION_TRACE |
6c81fe79 | 89 | select HAVE_CONTEXT_TRACKING |
8c2c3df3 CM |
90 | help |
91 | ARM 64-bit (AArch64) Linux support. | |
92 | ||
93 | config 64BIT | |
94 | def_bool y | |
95 | ||
96 | config ARCH_PHYS_ADDR_T_64BIT | |
97 | def_bool y | |
98 | ||
99 | config MMU | |
100 | def_bool y | |
101 | ||
ce816fa8 | 102 | config NO_IOPORT_MAP |
d1e6dc91 | 103 | def_bool y if !PCI |
8c2c3df3 CM |
104 | |
105 | config STACKTRACE_SUPPORT | |
106 | def_bool y | |
107 | ||
108 | config LOCKDEP_SUPPORT | |
109 | def_bool y | |
110 | ||
111 | config TRACE_IRQFLAGS_SUPPORT | |
112 | def_bool y | |
113 | ||
c209f799 | 114 | config RWSEM_XCHGADD_ALGORITHM |
8c2c3df3 CM |
115 | def_bool y |
116 | ||
9fb7410f DM |
117 | config GENERIC_BUG |
118 | def_bool y | |
119 | depends on BUG | |
120 | ||
121 | config GENERIC_BUG_RELATIVE_POINTERS | |
122 | def_bool y | |
123 | depends on GENERIC_BUG | |
124 | ||
8c2c3df3 CM |
125 | config GENERIC_HWEIGHT |
126 | def_bool y | |
127 | ||
128 | config GENERIC_CSUM | |
129 | def_bool y | |
130 | ||
131 | config GENERIC_CALIBRATE_DELAY | |
132 | def_bool y | |
133 | ||
19e7640d | 134 | config ZONE_DMA |
8c2c3df3 CM |
135 | def_bool y |
136 | ||
29e56940 SC |
137 | config HAVE_GENERIC_RCU_GUP |
138 | def_bool y | |
139 | ||
8c2c3df3 CM |
140 | config ARCH_DMA_ADDR_T_64BIT |
141 | def_bool y | |
142 | ||
143 | config NEED_DMA_MAP_STATE | |
144 | def_bool y | |
145 | ||
146 | config NEED_SG_DMA_LENGTH | |
147 | def_bool y | |
148 | ||
4b3dc967 WD |
149 | config SMP |
150 | def_bool y | |
151 | ||
8c2c3df3 CM |
152 | config SWIOTLB |
153 | def_bool y | |
154 | ||
155 | config IOMMU_HELPER | |
156 | def_bool SWIOTLB | |
157 | ||
4cfb3613 AB |
158 | config KERNEL_MODE_NEON |
159 | def_bool y | |
160 | ||
92cc15fc RH |
161 | config FIX_EARLYCON_MEM |
162 | def_bool y | |
163 | ||
9f25e6ad KS |
164 | config PGTABLE_LEVELS |
165 | int | |
166 | default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42 | |
167 | default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48 | |
168 | default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39 | |
169 | default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48 | |
170 | ||
8c2c3df3 CM |
171 | source "init/Kconfig" |
172 | ||
173 | source "kernel/Kconfig.freezer" | |
174 | ||
1ae90e79 CM |
175 | menu "Platform selection" |
176 | ||
6f56eef1 AA |
177 | config ARCH_EXYNOS |
178 | bool | |
179 | help | |
180 | This enables support for Samsung Exynos SoC family | |
181 | ||
182 | config ARCH_EXYNOS7 | |
183 | bool "ARMv8 based Samsung Exynos7" | |
184 | select ARCH_EXYNOS | |
185 | select COMMON_CLK_SAMSUNG | |
186 | select HAVE_S3C2410_WATCHDOG if WATCHDOG | |
187 | select HAVE_S3C_RTC if RTC_CLASS | |
188 | select PINCTRL | |
189 | select PINCTRL_EXYNOS | |
190 | ||
191 | help | |
192 | This enables support for Samsung Exynos7 SoC family | |
193 | ||
5118a6a3 OJ |
194 | config ARCH_FSL_LS2085A |
195 | bool "Freescale LS2085A SOC" | |
196 | help | |
197 | This enables support for Freescale LS2085A SOC. | |
198 | ||
85fe946e BW |
199 | config ARCH_HISI |
200 | bool "Hisilicon SoC Family" | |
201 | help | |
202 | This enables support for Hisilicon ARMv8 SoC family | |
203 | ||
4727a6f6 EH |
204 | config ARCH_MEDIATEK |
205 | bool "Mediatek MT65xx & MT81xx ARMv8 SoC" | |
206 | select ARM_GIC | |
0a233cdf | 207 | select PINCTRL |
4727a6f6 EH |
208 | help |
209 | Support for Mediatek MT65xx & MT81xx ARMv8 SoCs | |
210 | ||
d7f64a44 AK |
211 | config ARCH_QCOM |
212 | bool "Qualcomm Platforms" | |
213 | select PINCTRL | |
214 | help | |
215 | This enables support for the ARMv8 based Qualcomm chipsets. | |
216 | ||
41904360 SS |
217 | config ARCH_SEATTLE |
218 | bool "AMD Seattle SoC Family" | |
219 | help | |
220 | This enables support for AMD Seattle SOC Family | |
221 | ||
d035fdfa PW |
222 | config ARCH_TEGRA |
223 | bool "NVIDIA Tegra SoC Family" | |
224 | select ARCH_HAS_RESET_CONTROLLER | |
225 | select ARCH_REQUIRE_GPIOLIB | |
226 | select CLKDEV_LOOKUP | |
227 | select CLKSRC_MMIO | |
228 | select CLKSRC_OF | |
229 | select GENERIC_CLOCKEVENTS | |
230 | select HAVE_CLK | |
d035fdfa PW |
231 | select PINCTRL |
232 | select RESET_CONTROLLER | |
233 | help | |
234 | This enables support for the NVIDIA Tegra SoC family. | |
235 | ||
236 | config ARCH_TEGRA_132_SOC | |
237 | bool "NVIDIA Tegra132 SoC" | |
238 | depends on ARCH_TEGRA | |
239 | select PINCTRL_TEGRA124 | |
d035fdfa PW |
240 | select USB_ULPI if USB_PHY |
241 | select USB_ULPI_VIEWPORT if USB_PHY | |
242 | help | |
243 | Enable support for NVIDIA Tegra132 SoC, based on the Denver | |
244 | ARMv8 CPU. The Tegra132 SoC is similar to the Tegra124 SoC, | |
245 | but contains an NVIDIA Denver CPU complex in place of | |
246 | Tegra124's "4+1" Cortex-A15 CPU complex. | |
247 | ||
c4bb7995 ZZ |
248 | config ARCH_SPRD |
249 | bool "Spreadtrum SoC platform" | |
250 | help | |
251 | Support for Spreadtrum ARM based SoCs | |
252 | ||
28f7420d RMC |
253 | config ARCH_THUNDER |
254 | bool "Cavium Inc. Thunder SoC Family" | |
255 | help | |
256 | This enables support for Cavium's Thunder Family of SoCs. | |
257 | ||
1ae90e79 CM |
258 | config ARCH_VEXPRESS |
259 | bool "ARMv8 software model (Versatile Express)" | |
260 | select ARCH_REQUIRE_GPIOLIB | |
261 | select COMMON_CLK_VERSATILE | |
aa1e8ec1 | 262 | select POWER_RESET_VEXPRESS |
1ae90e79 CM |
263 | select VEXPRESS_CONFIG |
264 | help | |
265 | This enables support for the ARMv8 software model (Versatile | |
266 | Express). | |
8c2c3df3 | 267 | |
15942853 VK |
268 | config ARCH_XGENE |
269 | bool "AppliedMicro X-Gene SOC Family" | |
270 | help | |
271 | This enables support for AppliedMicro X-Gene SOC Family | |
272 | ||
5d1b79d2 MS |
273 | config ARCH_ZYNQMP |
274 | bool "Xilinx ZynqMP Family" | |
275 | help | |
276 | This enables support for Xilinx ZynqMP Family | |
277 | ||
8c2c3df3 CM |
278 | endmenu |
279 | ||
280 | menu "Bus support" | |
281 | ||
d1e6dc91 LD |
282 | config PCI |
283 | bool "PCI support" | |
284 | help | |
285 | This feature enables support for PCI bus system. If you say Y | |
286 | here, the kernel will include drivers and infrastructure code | |
287 | to support PCI bus devices. | |
288 | ||
289 | config PCI_DOMAINS | |
290 | def_bool PCI | |
291 | ||
292 | config PCI_DOMAINS_GENERIC | |
293 | def_bool PCI | |
294 | ||
295 | config PCI_SYSCALL | |
296 | def_bool PCI | |
297 | ||
298 | source "drivers/pci/Kconfig" | |
299 | source "drivers/pci/pcie/Kconfig" | |
300 | source "drivers/pci/hotplug/Kconfig" | |
301 | ||
8c2c3df3 CM |
302 | endmenu |
303 | ||
304 | menu "Kernel Features" | |
305 | ||
c0a01b84 AP |
306 | menu "ARM errata workarounds via the alternatives framework" |
307 | ||
308 | config ARM64_ERRATUM_826319 | |
309 | bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted" | |
310 | default y | |
311 | help | |
312 | This option adds an alternative code sequence to work around ARM | |
313 | erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or | |
314 | AXI master interface and an L2 cache. | |
315 | ||
316 | If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors | |
317 | and is unable to accept a certain write via this interface, it will | |
318 | not progress on read data presented on the read data channel and the | |
319 | system can deadlock. | |
320 | ||
321 | The workaround promotes data cache clean instructions to | |
322 | data cache clean-and-invalidate. | |
323 | Please note that this does not necessarily enable the workaround, | |
324 | as it depends on the alternative framework, which will only patch | |
325 | the kernel if an affected CPU is detected. | |
326 | ||
327 | If unsure, say Y. | |
328 | ||
329 | config ARM64_ERRATUM_827319 | |
330 | bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect" | |
331 | default y | |
332 | help | |
333 | This option adds an alternative code sequence to work around ARM | |
334 | erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI | |
335 | master interface and an L2 cache. | |
336 | ||
337 | Under certain conditions this erratum can cause a clean line eviction | |
338 | to occur at the same time as another transaction to the same address | |
339 | on the AMBA 5 CHI interface, which can cause data corruption if the | |
340 | interconnect reorders the two transactions. | |
341 | ||
342 | The workaround promotes data cache clean instructions to | |
343 | data cache clean-and-invalidate. | |
344 | Please note that this does not necessarily enable the workaround, | |
345 | as it depends on the alternative framework, which will only patch | |
346 | the kernel if an affected CPU is detected. | |
347 | ||
348 | If unsure, say Y. | |
349 | ||
350 | config ARM64_ERRATUM_824069 | |
351 | bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop" | |
352 | default y | |
353 | help | |
354 | This option adds an alternative code sequence to work around ARM | |
355 | erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected | |
356 | to a coherent interconnect. | |
357 | ||
358 | If a Cortex-A53 processor is executing a store or prefetch for | |
359 | write instruction at the same time as a processor in another | |
360 | cluster is executing a cache maintenance operation to the same | |
361 | address, then this erratum might cause a clean cache line to be | |
362 | incorrectly marked as dirty. | |
363 | ||
364 | The workaround promotes data cache clean instructions to | |
365 | data cache clean-and-invalidate. | |
366 | Please note that this option does not necessarily enable the | |
367 | workaround, as it depends on the alternative framework, which will | |
368 | only patch the kernel if an affected CPU is detected. | |
369 | ||
370 | If unsure, say Y. | |
371 | ||
372 | config ARM64_ERRATUM_819472 | |
373 | bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption" | |
374 | default y | |
375 | help | |
376 | This option adds an alternative code sequence to work around ARM | |
377 | erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache | |
378 | present when it is connected to a coherent interconnect. | |
379 | ||
380 | If the processor is executing a load and store exclusive sequence at | |
381 | the same time as a processor in another cluster is executing a cache | |
382 | maintenance operation to the same address, then this erratum might | |
383 | cause data corruption. | |
384 | ||
385 | The workaround promotes data cache clean instructions to | |
386 | data cache clean-and-invalidate. | |
387 | Please note that this does not necessarily enable the workaround, | |
388 | as it depends on the alternative framework, which will only patch | |
389 | the kernel if an affected CPU is detected. | |
390 | ||
391 | If unsure, say Y. | |
392 | ||
393 | config ARM64_ERRATUM_832075 | |
394 | bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads" | |
395 | default y | |
396 | help | |
397 | This option adds an alternative code sequence to work around ARM | |
398 | erratum 832075 on Cortex-A57 parts up to r1p2. | |
399 | ||
400 | Affected Cortex-A57 parts might deadlock when exclusive load/store | |
401 | instructions to Write-Back memory are mixed with Device loads. | |
402 | ||
403 | The workaround is to promote device loads to use Load-Acquire | |
404 | semantics. | |
405 | Please note that this does not necessarily enable the workaround, | |
406 | as it depends on the alternative framework, which will only patch | |
407 | the kernel if an affected CPU is detected. | |
408 | ||
409 | If unsure, say Y. | |
410 | ||
905e8c5d WD |
411 | config ARM64_ERRATUM_845719 |
412 | bool "Cortex-A53: 845719: a load might read incorrect data" | |
413 | depends on COMPAT | |
414 | default y | |
415 | help | |
416 | This option adds an alternative code sequence to work around ARM | |
417 | erratum 845719 on Cortex-A53 parts up to r0p4. | |
418 | ||
419 | When running a compat (AArch32) userspace on an affected Cortex-A53 | |
420 | part, a load at EL0 from a virtual address that matches the bottom 32 | |
421 | bits of the virtual address used by a recent load at (AArch64) EL1 | |
422 | might return incorrect data. | |
423 | ||
424 | The workaround is to write the contextidr_el1 register on exception | |
425 | return to a 32-bit task. | |
426 | Please note that this does not necessarily enable the workaround, | |
427 | as it depends on the alternative framework, which will only patch | |
428 | the kernel if an affected CPU is detected. | |
429 | ||
430 | If unsure, say Y. | |
431 | ||
c0a01b84 AP |
432 | endmenu |
433 | ||
434 | ||
e41ceed0 JL |
435 | choice |
436 | prompt "Page size" | |
437 | default ARM64_4K_PAGES | |
438 | help | |
439 | Page size (translation granule) configuration. | |
440 | ||
441 | config ARM64_4K_PAGES | |
442 | bool "4KB" | |
443 | help | |
444 | This feature enables 4KB pages support. | |
445 | ||
8c2c3df3 | 446 | config ARM64_64K_PAGES |
e41ceed0 | 447 | bool "64KB" |
8c2c3df3 CM |
448 | help |
449 | This feature enables 64KB pages support (4KB by default) | |
450 | allowing only two levels of page tables and faster TLB | |
451 | look-up. AArch32 emulation is not available when this feature | |
452 | is enabled. | |
453 | ||
e41ceed0 JL |
454 | endchoice |
455 | ||
456 | choice | |
457 | prompt "Virtual address space size" | |
458 | default ARM64_VA_BITS_39 if ARM64_4K_PAGES | |
459 | default ARM64_VA_BITS_42 if ARM64_64K_PAGES | |
460 | help | |
461 | Allows choosing one of multiple possible virtual address | |
462 | space sizes. The level of translation table is determined by | |
463 | a combination of page size and virtual address space size. | |
464 | ||
465 | config ARM64_VA_BITS_39 | |
466 | bool "39-bit" | |
467 | depends on ARM64_4K_PAGES | |
468 | ||
469 | config ARM64_VA_BITS_42 | |
470 | bool "42-bit" | |
471 | depends on ARM64_64K_PAGES | |
472 | ||
c79b954b JL |
473 | config ARM64_VA_BITS_48 |
474 | bool "48-bit" | |
c79b954b | 475 | |
e41ceed0 JL |
476 | endchoice |
477 | ||
478 | config ARM64_VA_BITS | |
479 | int | |
480 | default 39 if ARM64_VA_BITS_39 | |
481 | default 42 if ARM64_VA_BITS_42 | |
c79b954b | 482 | default 48 if ARM64_VA_BITS_48 |
e41ceed0 | 483 | |
2f4b829c CM |
484 | config ARM64_HW_AFDBM |
485 | bool "Support for hardware updates of the Access and Dirty page flags" | |
486 | default y | |
487 | help | |
488 | The ARMv8.1 architecture extensions introduce support for | |
489 | hardware updates of the access and dirty information in page | |
490 | table entries. When enabled in TCR_EL1 (HA and HD bits) on | |
491 | capable processors, accesses to pages with PTE_AF cleared will | |
492 | set this bit instead of raising an access flag fault. | |
493 | Similarly, writes to read-only pages with the DBM bit set will | |
494 | clear the read-only bit (AP[2]) instead of raising a | |
495 | permission fault. | |
496 | ||
497 | Kernels built with this configuration option enabled continue | |
498 | to work on pre-ARMv8.1 hardware and the performance impact is | |
499 | minimal. If unsure, say Y. | |
500 | ||
a872013d WD |
501 | config CPU_BIG_ENDIAN |
502 | bool "Build big-endian kernel" | |
503 | help | |
504 | Say Y if you plan on running a kernel in big-endian mode. | |
505 | ||
f6e763b9 MB |
506 | config SCHED_MC |
507 | bool "Multi-core scheduler support" | |
f6e763b9 MB |
508 | help |
509 | Multi-core scheduler support improves the CPU scheduler's decision | |
510 | making when dealing with multi-core CPU chips at a cost of slightly | |
511 | increased overhead in some places. If unsure say N here. | |
512 | ||
513 | config SCHED_SMT | |
514 | bool "SMT scheduler support" | |
f6e763b9 MB |
515 | help |
516 | Improves the CPU scheduler's decision making when dealing with | |
517 | MultiThreading at a cost of slightly increased overhead in some | |
518 | places. If unsure say N here. | |
519 | ||
8c2c3df3 | 520 | config NR_CPUS |
62aa9655 GK |
521 | int "Maximum number of CPUs (2-4096)" |
522 | range 2 4096 | |
15942853 | 523 | # These have to remain sorted largest to smallest |
e3672649 | 524 | default "64" |
8c2c3df3 | 525 | |
9327e2c6 MR |
526 | config HOTPLUG_CPU |
527 | bool "Support for hot-pluggable CPUs" | |
9327e2c6 MR |
528 | help |
529 | Say Y here to experiment with turning CPUs off and on. CPUs | |
530 | can be controlled through /sys/devices/system/cpu. | |
531 | ||
8c2c3df3 CM |
532 | source kernel/Kconfig.preempt |
533 | ||
534 | config HZ | |
535 | int | |
536 | default 100 | |
537 | ||
538 | config ARCH_HAS_HOLES_MEMORYMODEL | |
539 | def_bool y if SPARSEMEM | |
540 | ||
541 | config ARCH_SPARSEMEM_ENABLE | |
542 | def_bool y | |
543 | select SPARSEMEM_VMEMMAP_ENABLE | |
544 | ||
545 | config ARCH_SPARSEMEM_DEFAULT | |
546 | def_bool ARCH_SPARSEMEM_ENABLE | |
547 | ||
548 | config ARCH_SELECT_MEMORY_MODEL | |
549 | def_bool ARCH_SPARSEMEM_ENABLE | |
550 | ||
551 | config HAVE_ARCH_PFN_VALID | |
552 | def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM | |
553 | ||
554 | config HW_PERF_EVENTS | |
555 | bool "Enable hardware performance counter support for perf events" | |
556 | depends on PERF_EVENTS | |
557 | default y | |
558 | help | |
559 | Enable hardware performance counter support for perf events. If | |
560 | disabled, perf events will use software events only. | |
561 | ||
084bd298 SC |
562 | config SYS_SUPPORTS_HUGETLBFS |
563 | def_bool y | |
564 | ||
565 | config ARCH_WANT_GENERAL_HUGETLB | |
566 | def_bool y | |
567 | ||
568 | config ARCH_WANT_HUGE_PMD_SHARE | |
569 | def_bool y if !ARM64_64K_PAGES | |
570 | ||
af074848 SC |
571 | config HAVE_ARCH_TRANSPARENT_HUGEPAGE |
572 | def_bool y | |
573 | ||
a41dc0e8 CM |
574 | config ARCH_HAS_CACHE_LINE_SIZE |
575 | def_bool y | |
576 | ||
8c2c3df3 CM |
577 | source "mm/Kconfig" |
578 | ||
a1ae65b2 AT |
579 | config SECCOMP |
580 | bool "Enable seccomp to safely compute untrusted bytecode" | |
581 | ---help--- | |
582 | This kernel feature is useful for number crunching applications | |
583 | that may need to compute untrusted bytecode during their | |
584 | execution. By using pipes or other transports made available to | |
585 | the process as file descriptors supporting the read/write | |
586 | syscalls, it's possible to isolate those applications in | |
587 | their own address space using seccomp. Once seccomp is | |
588 | enabled via prctl(PR_SET_SECCOMP), it cannot be disabled | |
589 | and the task is only allowed to execute a few safe syscalls | |
590 | defined by each seccomp mode. | |
591 | ||
aa42aa13 SS |
592 | config XEN_DOM0 |
593 | def_bool y | |
594 | depends on XEN | |
595 | ||
596 | config XEN | |
c2ba1f7d | 597 | bool "Xen guest support on ARM64" |
aa42aa13 | 598 | depends on ARM64 && OF |
83862ccf | 599 | select SWIOTLB_XEN |
aa42aa13 SS |
600 | help |
601 | Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. | |
602 | ||
d03bb145 SC |
603 | config FORCE_MAX_ZONEORDER |
604 | int | |
605 | default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) | |
606 | default "11" | |
607 | ||
338d4f49 JM |
608 | config ARM64_PAN |
609 | bool "Enable support for Privileged Access Never (PAN)" | |
610 | default y | |
611 | help | |
612 | Privileged Access Never (PAN; part of the ARMv8.1 Extensions) | |
613 | prevents the kernel or hypervisor from accessing user-space (EL0) | |
614 | memory directly. | |
615 | ||
616 | Choosing this option will cause any unprotected (not using | |
617 | copy_to_user et al) memory access to fail with a permission fault. | |
618 | ||
619 | The feature is detected at runtime, and will remain as a 'nop' | |
620 | instruction if the cpu does not implement the feature. | |
621 | ||
c0385b24 WD |
622 | config ARM64_LSE_ATOMICS |
623 | bool "ARMv8.1 atomic instructions" | |
624 | help | |
625 | As part of the Large System Extensions, ARMv8.1 introduces new | |
626 | atomic instructions that are designed specifically to scale in | |
627 | very large systems. | |
628 | ||
629 | Say Y here to make use of these instructions for the in-kernel | |
630 | atomic routines. This incurs a small overhead on CPUs that do | |
631 | not support these instructions and requires the kernel to be | |
632 | built with binutils >= 2.25. | |
633 | ||
1b907f46 WD |
634 | menuconfig ARMV8_DEPRECATED |
635 | bool "Emulate deprecated/obsolete ARMv8 instructions" | |
636 | depends on COMPAT | |
637 | help | |
638 | Legacy software support may require certain instructions | |
639 | that have been deprecated or obsoleted in the architecture. | |
640 | ||
641 | Enable this config to enable selective emulation of these | |
642 | features. | |
643 | ||
644 | If unsure, say Y | |
645 | ||
646 | if ARMV8_DEPRECATED | |
647 | ||
648 | config SWP_EMULATION | |
649 | bool "Emulate SWP/SWPB instructions" | |
650 | help | |
651 | ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that | |
652 | they are always undefined. Say Y here to enable software | |
653 | emulation of these instructions for userspace using LDXR/STXR. | |
654 | ||
655 | In some older versions of glibc [<=2.8] SWP is used during futex | |
656 | trylock() operations with the assumption that the code will not | |
657 | be preempted. This invalid assumption may be more likely to fail | |
658 | with SWP emulation enabled, leading to deadlock of the user | |
659 | application. | |
660 | ||
661 | NOTE: when accessing uncached shared regions, LDXR/STXR rely | |
662 | on an external transaction monitoring block called a global | |
663 | monitor to maintain update atomicity. If your system does not | |
664 | implement a global monitor, this option can cause programs that | |
665 | perform SWP operations to uncached memory to deadlock. | |
666 | ||
667 | If unsure, say Y | |
668 | ||
669 | config CP15_BARRIER_EMULATION | |
670 | bool "Emulate CP15 Barrier instructions" | |
671 | help | |
672 | The CP15 barrier instructions - CP15ISB, CP15DSB, and | |
673 | CP15DMB - are deprecated in ARMv8 (and ARMv7). It is | |
674 | strongly recommended to use the ISB, DSB, and DMB | |
675 | instructions instead. | |
676 | ||
677 | Say Y here to enable software emulation of these | |
678 | instructions for AArch32 userspace code. When this option is | |
679 | enabled, CP15 barrier usage is traced which can help | |
680 | identify software that needs updating. | |
681 | ||
682 | If unsure, say Y | |
683 | ||
2d888f48 SP |
684 | config SETEND_EMULATION |
685 | bool "Emulate SETEND instruction" | |
686 | help | |
687 | The SETEND instruction alters the data-endianness of the | |
688 | AArch32 EL0, and is deprecated in ARMv8. | |
689 | ||
690 | Say Y here to enable software emulation of the instruction | |
691 | for AArch32 userspace code. | |
692 | ||
693 | Note: All the cpus on the system must have mixed endian support at EL0 | |
694 | for this feature to be enabled. If a new CPU - which doesn't support mixed | |
695 | endian - is hotplugged in after this feature has been enabled, there could | |
696 | be unexpected results in the applications. | |
697 | ||
698 | If unsure, say Y | |
1b907f46 WD |
699 | endif |
700 | ||
8c2c3df3 CM |
701 | endmenu |
702 | ||
703 | menu "Boot options" | |
704 | ||
705 | config CMDLINE | |
706 | string "Default kernel command string" | |
707 | default "" | |
708 | help | |
709 | Provide a set of default command-line options at build time by | |
710 | entering them here. As a minimum, you should specify the the | |
711 | root device (e.g. root=/dev/nfs). | |
712 | ||
713 | config CMDLINE_FORCE | |
714 | bool "Always use the default kernel command string" | |
715 | help | |
716 | Always use the default kernel command string, even if the boot | |
717 | loader passes other arguments to the kernel. | |
718 | This is useful if you cannot or don't want to change the | |
719 | command-line options your boot loader passes to the kernel. | |
720 | ||
f4f75ad5 AB |
721 | config EFI_STUB |
722 | bool | |
723 | ||
f84d0275 MS |
724 | config EFI |
725 | bool "UEFI runtime support" | |
726 | depends on OF && !CPU_BIG_ENDIAN | |
727 | select LIBFDT | |
728 | select UCS2_STRING | |
729 | select EFI_PARAMS_FROM_FDT | |
e15dd494 | 730 | select EFI_RUNTIME_WRAPPERS |
f4f75ad5 AB |
731 | select EFI_STUB |
732 | select EFI_ARMSTUB | |
f84d0275 MS |
733 | default y |
734 | help | |
735 | This option provides support for runtime services provided | |
736 | by UEFI firmware (such as non-volatile variables, realtime | |
3c7f2550 MS |
737 | clock, and platform reset). A UEFI stub is also provided to |
738 | allow the kernel to be booted as an EFI application. This | |
739 | is only useful on systems that have UEFI firmware. | |
f84d0275 | 740 | |
d1ae8c00 YL |
741 | config DMI |
742 | bool "Enable support for SMBIOS (DMI) tables" | |
743 | depends on EFI | |
744 | default y | |
745 | help | |
746 | This enables SMBIOS/DMI feature for systems. | |
747 | ||
748 | This option is only useful on systems that have UEFI firmware. | |
749 | However, even with this option, the resultant kernel should | |
750 | continue to boot on existing non-UEFI platforms. | |
751 | ||
8c2c3df3 CM |
752 | endmenu |
753 | ||
754 | menu "Userspace binary formats" | |
755 | ||
756 | source "fs/Kconfig.binfmt" | |
757 | ||
758 | config COMPAT | |
759 | bool "Kernel support for 32-bit EL0" | |
a8fcd8b1 | 760 | depends on !ARM64_64K_PAGES || EXPERT |
8c2c3df3 | 761 | select COMPAT_BINFMT_ELF |
af1839eb | 762 | select HAVE_UID16 |
84b9e9b4 | 763 | select OLD_SIGSUSPEND3 |
51682036 | 764 | select COMPAT_OLD_SIGACTION |
8c2c3df3 CM |
765 | help |
766 | This option enables support for a 32-bit EL0 running under a 64-bit | |
767 | kernel at EL1. AArch32-specific components such as system calls, | |
768 | the user helper functions, VFP support and the ptrace interface are | |
769 | handled appropriately by the kernel. | |
770 | ||
a8fcd8b1 AG |
771 | If you also enabled CONFIG_ARM64_64K_PAGES, please be aware that you |
772 | will only be able to execute AArch32 binaries that were compiled with | |
773 | 64k aligned segments. | |
774 | ||
8c2c3df3 CM |
775 | If you want to execute 32-bit userspace applications, say Y. |
776 | ||
777 | config SYSVIPC_COMPAT | |
778 | def_bool y | |
779 | depends on COMPAT && SYSVIPC | |
780 | ||
781 | endmenu | |
782 | ||
166936ba LP |
783 | menu "Power management options" |
784 | ||
785 | source "kernel/power/Kconfig" | |
786 | ||
787 | config ARCH_SUSPEND_POSSIBLE | |
788 | def_bool y | |
789 | ||
166936ba LP |
790 | endmenu |
791 | ||
1307220d LP |
792 | menu "CPU Power Management" |
793 | ||
794 | source "drivers/cpuidle/Kconfig" | |
795 | ||
52e7e816 RH |
796 | source "drivers/cpufreq/Kconfig" |
797 | ||
798 | endmenu | |
799 | ||
8c2c3df3 CM |
800 | source "net/Kconfig" |
801 | ||
802 | source "drivers/Kconfig" | |
803 | ||
f84d0275 MS |
804 | source "drivers/firmware/Kconfig" |
805 | ||
b6a02173 GG |
806 | source "drivers/acpi/Kconfig" |
807 | ||
8c2c3df3 CM |
808 | source "fs/Kconfig" |
809 | ||
c3eb5b14 MZ |
810 | source "arch/arm64/kvm/Kconfig" |
811 | ||
8c2c3df3 CM |
812 | source "arch/arm64/Kconfig.debug" |
813 | ||
814 | source "security/Kconfig" | |
815 | ||
816 | source "crypto/Kconfig" | |
2c98833a AB |
817 | if CRYPTO |
818 | source "arch/arm64/crypto/Kconfig" | |
819 | endif | |
8c2c3df3 CM |
820 | |
821 | source "lib/Kconfig" |