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