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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 |
5f1ae4eb | 5 | select ACPI_GTDT if ACPI |
c6bb8f89 | 6 | select ACPI_IORT if ACPI |
6933de0c | 7 | select ACPI_REDUCED_HARDWARE_ONLY if ACPI |
0cb0786b | 8 | select ACPI_MCFG if ACPI |
888125a7 | 9 | select ACPI_SPCR_TABLE if ACPI |
1d8f51d4 | 10 | select ARCH_CLOCKSOURCE_DATA |
ec6d06ef | 11 | select ARCH_HAS_DEBUG_VIRTUAL |
21266be9 | 12 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
38b04a74 | 13 | select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI |
2b68f6ca | 14 | select ARCH_HAS_ELF_RANDOMIZE |
6974f0c4 | 15 | select ARCH_HAS_FORTIFY_SOURCE |
957e3fac | 16 | select ARCH_HAS_GCOV_PROFILE_ALL |
e1073d1e | 17 | select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA |
5e4c7549 | 18 | select ARCH_HAS_KCOV |
d2852a22 | 19 | select ARCH_HAS_SET_MEMORY |
308c09f1 | 20 | select ARCH_HAS_SG_CHAIN |
ad21fc4f LA |
21 | select ARCH_HAS_STRICT_KERNEL_RWX |
22 | select ARCH_HAS_STRICT_MODULE_RWX | |
1f85008e | 23 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
7edda088 | 24 | select ARCH_HAVE_NMI_SAFE_CMPXCHG if ACPI_APEI_SEA |
c63c8700 | 25 | select ARCH_USE_CMPXCHG_LOCKREF |
c484f256 | 26 | select ARCH_SUPPORTS_MEMORY_FAILURE |
4badad35 | 27 | select ARCH_SUPPORTS_ATOMIC_RMW |
56166230 | 28 | select ARCH_SUPPORTS_NUMA_BALANCING |
6212a512 | 29 | select ARCH_WANT_COMPAT_IPC_PARSE_VERSION |
b6f35981 | 30 | select ARCH_WANT_FRAME_POINTERS |
f0b7f8a4 | 31 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
25c92a37 | 32 | select ARM_AMBA |
1aee5d7a | 33 | select ARM_ARCH_TIMER |
c4188edc | 34 | select ARM_GIC |
875cbf3e | 35 | select AUDIT_ARCH_COMPAT_GENERIC |
3ee80364 | 36 | select ARM_GIC_V2M if PCI |
021f6537 | 37 | select ARM_GIC_V3 |
3ee80364 | 38 | select ARM_GIC_V3_ITS if PCI |
bff60792 | 39 | select ARM_PSCI_FW |
adace895 | 40 | select BUILDTIME_EXTABLE_SORT |
db2789b5 | 41 | select CLONE_BACKWARDS |
7ca2ef33 | 42 | select COMMON_CLK |
166936ba | 43 | select CPU_PM if (SUSPEND || CPU_IDLE) |
7bc13fd3 | 44 | select DCACHE_WORD_ACCESS |
ef37566c | 45 | select EDAC_SUPPORT |
2f34f173 | 46 | select FRAME_POINTER |
d4932f9e | 47 | select GENERIC_ALLOCATOR |
2ef7a295 | 48 | select GENERIC_ARCH_TOPOLOGY |
8c2c3df3 | 49 | select GENERIC_CLOCKEVENTS |
4b3dc967 | 50 | select GENERIC_CLOCKEVENTS_BROADCAST |
3be1a5c4 | 51 | select GENERIC_CPU_AUTOPROBE |
bf4b558e | 52 | select GENERIC_EARLY_IOREMAP |
2314ee4d | 53 | select GENERIC_IDLE_POLL_SETUP |
8c2c3df3 CM |
54 | select GENERIC_IRQ_PROBE |
55 | select GENERIC_IRQ_SHOW | |
6544e67b | 56 | select GENERIC_IRQ_SHOW_LEVEL |
cb61f676 | 57 | select GENERIC_PCI_IOMAP |
65cd4f6c | 58 | select GENERIC_SCHED_CLOCK |
8c2c3df3 | 59 | select GENERIC_SMP_IDLE_THREAD |
12a0ef7b WD |
60 | select GENERIC_STRNCPY_FROM_USER |
61 | select GENERIC_STRNLEN_USER | |
8c2c3df3 | 62 | select GENERIC_TIME_VSYSCALL |
a1ddc74a | 63 | select HANDLE_DOMAIN_IRQ |
8c2c3df3 | 64 | select HARDIRQS_SW_RESEND |
9f9a35a7 | 65 | select HAVE_ACPI_APEI if (ACPI && EFI) |
5284e1b4 | 66 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
875cbf3e | 67 | select HAVE_ARCH_AUDITSYSCALL |
8e7a4cef | 68 | select HAVE_ARCH_BITREVERSE |
324420bf | 69 | select HAVE_ARCH_HUGE_VMAP |
9732cafd | 70 | select HAVE_ARCH_JUMP_LABEL |
f1b9032f | 71 | select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP && !(ARM64_16K_PAGES && ARM64_VA_BITS_48) |
9529247d | 72 | select HAVE_ARCH_KGDB |
8f0d3aa9 DC |
73 | select HAVE_ARCH_MMAP_RND_BITS |
74 | select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT | |
a1ae65b2 | 75 | select HAVE_ARCH_SECCOMP_FILTER |
8c2c3df3 | 76 | select HAVE_ARCH_TRACEHOOK |
8ee70879 YS |
77 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
78 | select HAVE_ARM_SMCCC | |
6077776b | 79 | select HAVE_EBPF_JIT |
af64d2aa | 80 | select HAVE_C_RECORDMCOUNT |
c0c264ae | 81 | select HAVE_CC_STACKPROTECTOR |
5284e1b4 | 82 | select HAVE_CMPXCHG_DOUBLE |
95eff6b2 | 83 | select HAVE_CMPXCHG_LOCAL |
8ee70879 | 84 | select HAVE_CONTEXT_TRACKING |
9b2a60c4 | 85 | select HAVE_DEBUG_BUGVERBOSE |
b69ec42b | 86 | select HAVE_DEBUG_KMEMLEAK |
8c2c3df3 | 87 | select HAVE_DMA_API_DEBUG |
6ac2104d | 88 | select HAVE_DMA_CONTIGUOUS |
bd7d38db | 89 | select HAVE_DYNAMIC_FTRACE |
50afc33a | 90 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
af64d2aa | 91 | select HAVE_FTRACE_MCOUNT_RECORD |
819e50e2 AT |
92 | select HAVE_FUNCTION_TRACER |
93 | select HAVE_FUNCTION_GRAPH_TRACER | |
6b90bd4b | 94 | select HAVE_GCC_PLUGINS |
8c2c3df3 | 95 | select HAVE_GENERIC_DMA_COHERENT |
8c2c3df3 | 96 | select HAVE_HW_BREAKPOINT if PERF_EVENTS |
24da208d | 97 | select HAVE_IRQ_TIME_ACCOUNTING |
8c2c3df3 | 98 | select HAVE_MEMBLOCK |
1a2db300 | 99 | select HAVE_MEMBLOCK_NODE_MAP if NUMA |
7edda088 | 100 | select HAVE_NMI if ACPI_APEI_SEA |
55834a77 | 101 | select HAVE_PATA_PLATFORM |
8c2c3df3 | 102 | select HAVE_PERF_EVENTS |
2ee0d7fd JP |
103 | select HAVE_PERF_REGS |
104 | select HAVE_PERF_USER_STACK_DUMP | |
0a8ea52c | 105 | select HAVE_REGS_AND_STACK_ACCESS_API |
5e5f6dc1 | 106 | select HAVE_RCU_TABLE_FREE |
055b1212 | 107 | select HAVE_SYSCALL_TRACEPOINTS |
2dd0e8d2 | 108 | select HAVE_KPROBES |
cd1ee3b1 | 109 | select HAVE_KRETPROBES |
876945db | 110 | select IOMMU_DMA if IOMMU_SUPPORT |
8c2c3df3 | 111 | select IRQ_DOMAIN |
e8557d1f | 112 | select IRQ_FORCED_THREADING |
fea2acaa | 113 | select MODULES_USE_ELF_RELA |
8c2c3df3 CM |
114 | select NO_BOOTMEM |
115 | select OF | |
116 | select OF_EARLY_FLATTREE | |
9bf14b7c | 117 | select OF_RESERVED_MEM |
0cb0786b | 118 | select PCI_ECAM if ACPI |
aa1e8ec1 CM |
119 | select POWER_RESET |
120 | select POWER_SUPPLY | |
8c2c3df3 | 121 | select SPARSE_IRQ |
7ac57a89 | 122 | select SYSCTL_EXCEPTION_TRACE |
c02433dd | 123 | select THREAD_INFO_IN_TASK |
8c2c3df3 CM |
124 | help |
125 | ARM 64-bit (AArch64) Linux support. | |
126 | ||
127 | config 64BIT | |
128 | def_bool y | |
129 | ||
130 | config ARCH_PHYS_ADDR_T_64BIT | |
131 | def_bool y | |
132 | ||
133 | config MMU | |
134 | def_bool y | |
135 | ||
030c4d24 MR |
136 | config ARM64_PAGE_SHIFT |
137 | int | |
138 | default 16 if ARM64_64K_PAGES | |
139 | default 14 if ARM64_16K_PAGES | |
140 | default 12 | |
141 | ||
142 | config ARM64_CONT_SHIFT | |
143 | int | |
144 | default 5 if ARM64_64K_PAGES | |
145 | default 7 if ARM64_16K_PAGES | |
146 | default 4 | |
147 | ||
8f0d3aa9 DC |
148 | config ARCH_MMAP_RND_BITS_MIN |
149 | default 14 if ARM64_64K_PAGES | |
150 | default 16 if ARM64_16K_PAGES | |
151 | default 18 | |
152 | ||
153 | # max bits determined by the following formula: | |
154 | # VA_BITS - PAGE_SHIFT - 3 | |
155 | config ARCH_MMAP_RND_BITS_MAX | |
156 | default 19 if ARM64_VA_BITS=36 | |
157 | default 24 if ARM64_VA_BITS=39 | |
158 | default 27 if ARM64_VA_BITS=42 | |
159 | default 30 if ARM64_VA_BITS=47 | |
160 | default 29 if ARM64_VA_BITS=48 && ARM64_64K_PAGES | |
161 | default 31 if ARM64_VA_BITS=48 && ARM64_16K_PAGES | |
162 | default 33 if ARM64_VA_BITS=48 | |
163 | default 14 if ARM64_64K_PAGES | |
164 | default 16 if ARM64_16K_PAGES | |
165 | default 18 | |
166 | ||
167 | config ARCH_MMAP_RND_COMPAT_BITS_MIN | |
168 | default 7 if ARM64_64K_PAGES | |
169 | default 9 if ARM64_16K_PAGES | |
170 | default 11 | |
171 | ||
172 | config ARCH_MMAP_RND_COMPAT_BITS_MAX | |
173 | default 16 | |
174 | ||
ce816fa8 | 175 | config NO_IOPORT_MAP |
d1e6dc91 | 176 | def_bool y if !PCI |
8c2c3df3 CM |
177 | |
178 | config STACKTRACE_SUPPORT | |
179 | def_bool y | |
180 | ||
bf0c4e04 JVS |
181 | config ILLEGAL_POINTER_VALUE |
182 | hex | |
183 | default 0xdead000000000000 | |
184 | ||
8c2c3df3 CM |
185 | config LOCKDEP_SUPPORT |
186 | def_bool y | |
187 | ||
188 | config TRACE_IRQFLAGS_SUPPORT | |
189 | def_bool y | |
190 | ||
c209f799 | 191 | config RWSEM_XCHGADD_ALGORITHM |
8c2c3df3 CM |
192 | def_bool y |
193 | ||
9fb7410f DM |
194 | config GENERIC_BUG |
195 | def_bool y | |
196 | depends on BUG | |
197 | ||
198 | config GENERIC_BUG_RELATIVE_POINTERS | |
199 | def_bool y | |
200 | depends on GENERIC_BUG | |
201 | ||
8c2c3df3 CM |
202 | config GENERIC_HWEIGHT |
203 | def_bool y | |
204 | ||
205 | config GENERIC_CSUM | |
206 | def_bool y | |
207 | ||
208 | config GENERIC_CALIBRATE_DELAY | |
209 | def_bool y | |
210 | ||
19e7640d | 211 | config ZONE_DMA |
8c2c3df3 CM |
212 | def_bool y |
213 | ||
e585513b | 214 | config HAVE_GENERIC_GUP |
29e56940 SC |
215 | def_bool y |
216 | ||
8c2c3df3 CM |
217 | config ARCH_DMA_ADDR_T_64BIT |
218 | def_bool y | |
219 | ||
220 | config NEED_DMA_MAP_STATE | |
221 | def_bool y | |
222 | ||
223 | config NEED_SG_DMA_LENGTH | |
224 | def_bool y | |
225 | ||
4b3dc967 WD |
226 | config SMP |
227 | def_bool y | |
228 | ||
8c2c3df3 CM |
229 | config SWIOTLB |
230 | def_bool y | |
231 | ||
232 | config IOMMU_HELPER | |
233 | def_bool SWIOTLB | |
234 | ||
4cfb3613 AB |
235 | config KERNEL_MODE_NEON |
236 | def_bool y | |
237 | ||
92cc15fc RH |
238 | config FIX_EARLYCON_MEM |
239 | def_bool y | |
240 | ||
9f25e6ad KS |
241 | config PGTABLE_LEVELS |
242 | int | |
21539939 | 243 | default 2 if ARM64_16K_PAGES && ARM64_VA_BITS_36 |
9f25e6ad KS |
244 | default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42 |
245 | default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48 | |
246 | default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39 | |
44eaacf1 SP |
247 | default 3 if ARM64_16K_PAGES && ARM64_VA_BITS_47 |
248 | default 4 if !ARM64_64K_PAGES && ARM64_VA_BITS_48 | |
9f25e6ad | 249 | |
9842ceae PA |
250 | config ARCH_SUPPORTS_UPROBES |
251 | def_bool y | |
252 | ||
8f360948 AB |
253 | config ARCH_PROC_KCORE_TEXT |
254 | def_bool y | |
255 | ||
8c2c3df3 CM |
256 | source "init/Kconfig" |
257 | ||
258 | source "kernel/Kconfig.freezer" | |
259 | ||
6a377491 | 260 | source "arch/arm64/Kconfig.platforms" |
8c2c3df3 CM |
261 | |
262 | menu "Bus support" | |
263 | ||
d1e6dc91 LD |
264 | config PCI |
265 | bool "PCI support" | |
266 | help | |
267 | This feature enables support for PCI bus system. If you say Y | |
268 | here, the kernel will include drivers and infrastructure code | |
269 | to support PCI bus devices. | |
270 | ||
271 | config PCI_DOMAINS | |
272 | def_bool PCI | |
273 | ||
274 | config PCI_DOMAINS_GENERIC | |
275 | def_bool PCI | |
276 | ||
277 | config PCI_SYSCALL | |
278 | def_bool PCI | |
279 | ||
280 | source "drivers/pci/Kconfig" | |
d1e6dc91 | 281 | |
8c2c3df3 CM |
282 | endmenu |
283 | ||
284 | menu "Kernel Features" | |
285 | ||
c0a01b84 AP |
286 | menu "ARM errata workarounds via the alternatives framework" |
287 | ||
288 | config ARM64_ERRATUM_826319 | |
289 | bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted" | |
290 | default y | |
291 | help | |
292 | This option adds an alternative code sequence to work around ARM | |
293 | erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or | |
294 | AXI master interface and an L2 cache. | |
295 | ||
296 | If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors | |
297 | and is unable to accept a certain write via this interface, it will | |
298 | not progress on read data presented on the read data channel and the | |
299 | system can deadlock. | |
300 | ||
301 | The workaround promotes data cache clean instructions to | |
302 | data cache clean-and-invalidate. | |
303 | Please note that this does not necessarily enable the workaround, | |
304 | as it depends on the alternative framework, which will only patch | |
305 | the kernel if an affected CPU is detected. | |
306 | ||
307 | If unsure, say Y. | |
308 | ||
309 | config ARM64_ERRATUM_827319 | |
310 | bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect" | |
311 | default y | |
312 | help | |
313 | This option adds an alternative code sequence to work around ARM | |
314 | erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI | |
315 | master interface and an L2 cache. | |
316 | ||
317 | Under certain conditions this erratum can cause a clean line eviction | |
318 | to occur at the same time as another transaction to the same address | |
319 | on the AMBA 5 CHI interface, which can cause data corruption if the | |
320 | interconnect reorders the two transactions. | |
321 | ||
322 | The workaround promotes data cache clean instructions to | |
323 | data cache clean-and-invalidate. | |
324 | Please note that this does not necessarily enable the workaround, | |
325 | as it depends on the alternative framework, which will only patch | |
326 | the kernel if an affected CPU is detected. | |
327 | ||
328 | If unsure, say Y. | |
329 | ||
330 | config ARM64_ERRATUM_824069 | |
331 | bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop" | |
332 | default y | |
333 | help | |
334 | This option adds an alternative code sequence to work around ARM | |
335 | erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected | |
336 | to a coherent interconnect. | |
337 | ||
338 | If a Cortex-A53 processor is executing a store or prefetch for | |
339 | write instruction at the same time as a processor in another | |
340 | cluster is executing a cache maintenance operation to the same | |
341 | address, then this erratum might cause a clean cache line to be | |
342 | incorrectly marked as dirty. | |
343 | ||
344 | The workaround promotes data cache clean instructions to | |
345 | data cache clean-and-invalidate. | |
346 | Please note that this option does not necessarily enable the | |
347 | workaround, as it depends on the alternative framework, which will | |
348 | only patch the kernel if an affected CPU is detected. | |
349 | ||
350 | If unsure, say Y. | |
351 | ||
352 | config ARM64_ERRATUM_819472 | |
353 | bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption" | |
354 | default y | |
355 | help | |
356 | This option adds an alternative code sequence to work around ARM | |
357 | erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache | |
358 | present when it is connected to a coherent interconnect. | |
359 | ||
360 | If the processor is executing a load and store exclusive sequence at | |
361 | the same time as a processor in another cluster is executing a cache | |
362 | maintenance operation to the same address, then this erratum might | |
363 | cause data corruption. | |
364 | ||
365 | The workaround promotes data cache clean instructions to | |
366 | data cache clean-and-invalidate. | |
367 | Please note that this does not necessarily enable the workaround, | |
368 | as it depends on the alternative framework, which will only patch | |
369 | the kernel if an affected CPU is detected. | |
370 | ||
371 | If unsure, say Y. | |
372 | ||
373 | config ARM64_ERRATUM_832075 | |
374 | bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads" | |
375 | default y | |
376 | help | |
377 | This option adds an alternative code sequence to work around ARM | |
378 | erratum 832075 on Cortex-A57 parts up to r1p2. | |
379 | ||
380 | Affected Cortex-A57 parts might deadlock when exclusive load/store | |
381 | instructions to Write-Back memory are mixed with Device loads. | |
382 | ||
383 | The workaround is to promote device loads to use Load-Acquire | |
384 | semantics. | |
385 | Please note that this does not necessarily enable the workaround, | |
498cd5c3 MZ |
386 | as it depends on the alternative framework, which will only patch |
387 | the kernel if an affected CPU is detected. | |
388 | ||
389 | If unsure, say Y. | |
390 | ||
391 | config ARM64_ERRATUM_834220 | |
392 | bool "Cortex-A57: 834220: Stage 2 translation fault might be incorrectly reported in presence of a Stage 1 fault" | |
393 | depends on KVM | |
394 | default y | |
395 | help | |
396 | This option adds an alternative code sequence to work around ARM | |
397 | erratum 834220 on Cortex-A57 parts up to r1p2. | |
398 | ||
399 | Affected Cortex-A57 parts might report a Stage 2 translation | |
400 | fault as the result of a Stage 1 fault for load crossing a | |
401 | page boundary when there is a permission or device memory | |
402 | alignment fault at Stage 1 and a translation fault at Stage 2. | |
403 | ||
404 | The workaround is to verify that the Stage 1 translation | |
405 | doesn't generate a fault before handling the Stage 2 fault. | |
406 | Please note that this does not necessarily enable the workaround, | |
c0a01b84 AP |
407 | as it depends on the alternative framework, which will only patch |
408 | the kernel if an affected CPU is detected. | |
409 | ||
410 | If unsure, say Y. | |
411 | ||
905e8c5d WD |
412 | config ARM64_ERRATUM_845719 |
413 | bool "Cortex-A53: 845719: a load might read incorrect data" | |
414 | depends on COMPAT | |
415 | default y | |
416 | help | |
417 | This option adds an alternative code sequence to work around ARM | |
418 | erratum 845719 on Cortex-A53 parts up to r0p4. | |
419 | ||
420 | When running a compat (AArch32) userspace on an affected Cortex-A53 | |
421 | part, a load at EL0 from a virtual address that matches the bottom 32 | |
422 | bits of the virtual address used by a recent load at (AArch64) EL1 | |
423 | might return incorrect data. | |
424 | ||
425 | The workaround is to write the contextidr_el1 register on exception | |
426 | return to a 32-bit task. | |
427 | Please note that this does not necessarily enable the workaround, | |
428 | as it depends on the alternative framework, which will only patch | |
429 | the kernel if an affected CPU is detected. | |
430 | ||
431 | If unsure, say Y. | |
432 | ||
df057cc7 WD |
433 | config ARM64_ERRATUM_843419 |
434 | bool "Cortex-A53: 843419: A load or store might access an incorrect address" | |
df057cc7 | 435 | default y |
6ffe9923 | 436 | select ARM64_MODULE_CMODEL_LARGE if MODULES |
df057cc7 | 437 | help |
6ffe9923 WD |
438 | This option links the kernel with '--fix-cortex-a53-843419' and |
439 | builds modules using the large memory model in order to avoid the use | |
440 | of the ADRP instruction, which can cause a subsequent memory access | |
441 | to use an incorrect address on Cortex-A53 parts up to r0p4. | |
df057cc7 WD |
442 | |
443 | If unsure, say Y. | |
444 | ||
94100970 RR |
445 | config CAVIUM_ERRATUM_22375 |
446 | bool "Cavium erratum 22375, 24313" | |
447 | default y | |
448 | help | |
449 | Enable workaround for erratum 22375, 24313. | |
450 | ||
451 | This implements two gicv3-its errata workarounds for ThunderX. Both | |
452 | with small impact affecting only ITS table allocation. | |
453 | ||
454 | erratum 22375: only alloc 8MB table size | |
455 | erratum 24313: ignore memory access type | |
456 | ||
457 | The fixes are in ITS initialization and basically ignore memory access | |
458 | type and table size provided by the TYPER and BASER registers. | |
459 | ||
460 | If unsure, say Y. | |
461 | ||
fbf8f40e GK |
462 | config CAVIUM_ERRATUM_23144 |
463 | bool "Cavium erratum 23144: ITS SYNC hang on dual socket system" | |
464 | depends on NUMA | |
465 | default y | |
466 | help | |
467 | ITS SYNC command hang for cross node io and collections/cpu mapping. | |
468 | ||
469 | If unsure, say Y. | |
470 | ||
6d4e11c5 RR |
471 | config CAVIUM_ERRATUM_23154 |
472 | bool "Cavium erratum 23154: Access to ICC_IAR1_EL1 is not sync'ed" | |
473 | default y | |
474 | help | |
475 | The gicv3 of ThunderX requires a modified version for | |
476 | reading the IAR status to ensure data synchronization | |
477 | (access to icc_iar1_el1 is not sync'ed before and after). | |
478 | ||
479 | If unsure, say Y. | |
480 | ||
104a0c02 AP |
481 | config CAVIUM_ERRATUM_27456 |
482 | bool "Cavium erratum 27456: Broadcast TLBI instructions may cause icache corruption" | |
483 | default y | |
484 | help | |
485 | On ThunderX T88 pass 1.x through 2.1 parts, broadcast TLBI | |
486 | instructions may cause the icache to become corrupted if it | |
487 | contains data for a non-current ASID. The fix is to | |
488 | invalidate the icache when changing the mm context. | |
489 | ||
490 | If unsure, say Y. | |
491 | ||
690a3415 DD |
492 | config CAVIUM_ERRATUM_30115 |
493 | bool "Cavium erratum 30115: Guest may disable interrupts in host" | |
494 | default y | |
495 | help | |
496 | On ThunderX T88 pass 1.x through 2.2, T81 pass 1.0 through | |
497 | 1.2, and T83 Pass 1.0, KVM guest execution may disable | |
498 | interrupts in host. Trapping both GICv3 group-0 and group-1 | |
499 | accesses sidesteps the issue. | |
500 | ||
501 | If unsure, say Y. | |
502 | ||
38fd94b0 CC |
503 | config QCOM_FALKOR_ERRATUM_1003 |
504 | bool "Falkor E1003: Incorrect translation due to ASID change" | |
505 | default y | |
506 | select ARM64_PAN if ARM64_SW_TTBR0_PAN | |
507 | help | |
508 | On Falkor v1, an incorrect ASID may be cached in the TLB when ASID | |
509 | and BADDR are changed together in TTBRx_EL1. The workaround for this | |
510 | issue is to use a reserved ASID in cpu_do_switch_mm() before | |
511 | switching to the new ASID. Saying Y here selects ARM64_PAN if | |
512 | ARM64_SW_TTBR0_PAN is selected. This is done because implementing and | |
513 | maintaining the E1003 workaround in the software PAN emulation code | |
514 | would be an unnecessary complication. The affected Falkor v1 CPU | |
515 | implements ARMv8.1 hardware PAN support and using hardware PAN | |
516 | support versus software PAN emulation is mutually exclusive at | |
517 | runtime. | |
518 | ||
519 | If unsure, say Y. | |
520 | ||
d9ff80f8 CC |
521 | config QCOM_FALKOR_ERRATUM_1009 |
522 | bool "Falkor E1009: Prematurely complete a DSB after a TLBI" | |
523 | default y | |
524 | help | |
525 | On Falkor v1, the CPU may prematurely complete a DSB following a | |
526 | TLBI xxIS invalidate maintenance operation. Repeat the TLBI operation | |
527 | one more time to fix the issue. | |
528 | ||
529 | If unsure, say Y. | |
530 | ||
90922a2d SD |
531 | config QCOM_QDF2400_ERRATUM_0065 |
532 | bool "QDF2400 E0065: Incorrect GITS_TYPER.ITT_Entry_size" | |
533 | default y | |
534 | help | |
535 | On Qualcomm Datacenter Technologies QDF2400 SoC, ITS hardware reports | |
536 | ITE size incorrectly. The GITS_TYPER.ITT_Entry_size field should have | |
537 | been indicated as 16Bytes (0xf), not 8Bytes (0x7). | |
538 | ||
539 | If unsure, say Y. | |
540 | ||
c0a01b84 AP |
541 | endmenu |
542 | ||
543 | ||
e41ceed0 JL |
544 | choice |
545 | prompt "Page size" | |
546 | default ARM64_4K_PAGES | |
547 | help | |
548 | Page size (translation granule) configuration. | |
549 | ||
550 | config ARM64_4K_PAGES | |
551 | bool "4KB" | |
552 | help | |
553 | This feature enables 4KB pages support. | |
554 | ||
44eaacf1 SP |
555 | config ARM64_16K_PAGES |
556 | bool "16KB" | |
557 | help | |
558 | The system will use 16KB pages support. AArch32 emulation | |
559 | requires applications compiled with 16K (or a multiple of 16K) | |
560 | aligned segments. | |
561 | ||
8c2c3df3 | 562 | config ARM64_64K_PAGES |
e41ceed0 | 563 | bool "64KB" |
8c2c3df3 CM |
564 | help |
565 | This feature enables 64KB pages support (4KB by default) | |
566 | allowing only two levels of page tables and faster TLB | |
db488be3 SP |
567 | look-up. AArch32 emulation requires applications compiled |
568 | with 64K aligned segments. | |
8c2c3df3 | 569 | |
e41ceed0 JL |
570 | endchoice |
571 | ||
572 | choice | |
573 | prompt "Virtual address space size" | |
574 | default ARM64_VA_BITS_39 if ARM64_4K_PAGES | |
44eaacf1 | 575 | default ARM64_VA_BITS_47 if ARM64_16K_PAGES |
e41ceed0 JL |
576 | default ARM64_VA_BITS_42 if ARM64_64K_PAGES |
577 | help | |
578 | Allows choosing one of multiple possible virtual address | |
579 | space sizes. The level of translation table is determined by | |
580 | a combination of page size and virtual address space size. | |
581 | ||
21539939 | 582 | config ARM64_VA_BITS_36 |
56a3f30e | 583 | bool "36-bit" if EXPERT |
21539939 SP |
584 | depends on ARM64_16K_PAGES |
585 | ||
e41ceed0 JL |
586 | config ARM64_VA_BITS_39 |
587 | bool "39-bit" | |
588 | depends on ARM64_4K_PAGES | |
589 | ||
590 | config ARM64_VA_BITS_42 | |
591 | bool "42-bit" | |
592 | depends on ARM64_64K_PAGES | |
593 | ||
44eaacf1 SP |
594 | config ARM64_VA_BITS_47 |
595 | bool "47-bit" | |
596 | depends on ARM64_16K_PAGES | |
597 | ||
c79b954b JL |
598 | config ARM64_VA_BITS_48 |
599 | bool "48-bit" | |
c79b954b | 600 | |
e41ceed0 JL |
601 | endchoice |
602 | ||
603 | config ARM64_VA_BITS | |
604 | int | |
21539939 | 605 | default 36 if ARM64_VA_BITS_36 |
e41ceed0 JL |
606 | default 39 if ARM64_VA_BITS_39 |
607 | default 42 if ARM64_VA_BITS_42 | |
44eaacf1 | 608 | default 47 if ARM64_VA_BITS_47 |
c79b954b | 609 | default 48 if ARM64_VA_BITS_48 |
e41ceed0 | 610 | |
a872013d WD |
611 | config CPU_BIG_ENDIAN |
612 | bool "Build big-endian kernel" | |
613 | help | |
614 | Say Y if you plan on running a kernel in big-endian mode. | |
615 | ||
f6e763b9 MB |
616 | config SCHED_MC |
617 | bool "Multi-core scheduler support" | |
f6e763b9 MB |
618 | help |
619 | Multi-core scheduler support improves the CPU scheduler's decision | |
620 | making when dealing with multi-core CPU chips at a cost of slightly | |
621 | increased overhead in some places. If unsure say N here. | |
622 | ||
623 | config SCHED_SMT | |
624 | bool "SMT scheduler support" | |
f6e763b9 MB |
625 | help |
626 | Improves the CPU scheduler's decision making when dealing with | |
627 | MultiThreading at a cost of slightly increased overhead in some | |
628 | places. If unsure say N here. | |
629 | ||
8c2c3df3 | 630 | config NR_CPUS |
62aa9655 GK |
631 | int "Maximum number of CPUs (2-4096)" |
632 | range 2 4096 | |
15942853 | 633 | # These have to remain sorted largest to smallest |
e3672649 | 634 | default "64" |
8c2c3df3 | 635 | |
9327e2c6 MR |
636 | config HOTPLUG_CPU |
637 | bool "Support for hot-pluggable CPUs" | |
217d453d | 638 | select GENERIC_IRQ_MIGRATION |
9327e2c6 MR |
639 | help |
640 | Say Y here to experiment with turning CPUs off and on. CPUs | |
641 | can be controlled through /sys/devices/system/cpu. | |
642 | ||
1a2db300 GK |
643 | # Common NUMA Features |
644 | config NUMA | |
645 | bool "Numa Memory Allocation and Scheduler Support" | |
0c2a6cce KW |
646 | select ACPI_NUMA if ACPI |
647 | select OF_NUMA | |
1a2db300 GK |
648 | help |
649 | Enable NUMA (Non Uniform Memory Access) support. | |
650 | ||
651 | The kernel will try to allocate memory used by a CPU on the | |
652 | local memory of the CPU and add some more | |
653 | NUMA awareness to the kernel. | |
654 | ||
655 | config NODES_SHIFT | |
656 | int "Maximum NUMA Nodes (as a power of 2)" | |
657 | range 1 10 | |
658 | default "2" | |
659 | depends on NEED_MULTIPLE_NODES | |
660 | help | |
661 | Specify the maximum number of NUMA Nodes available on the target | |
662 | system. Increases memory reserved to accommodate various tables. | |
663 | ||
664 | config USE_PERCPU_NUMA_NODE_ID | |
665 | def_bool y | |
666 | depends on NUMA | |
667 | ||
7af3a0a9 ZL |
668 | config HAVE_SETUP_PER_CPU_AREA |
669 | def_bool y | |
670 | depends on NUMA | |
671 | ||
672 | config NEED_PER_CPU_EMBED_FIRST_CHUNK | |
673 | def_bool y | |
674 | depends on NUMA | |
675 | ||
6d526ee2 AB |
676 | config HOLES_IN_ZONE |
677 | def_bool y | |
678 | depends on NUMA | |
679 | ||
8c2c3df3 | 680 | source kernel/Kconfig.preempt |
f90df5e2 | 681 | source kernel/Kconfig.hz |
8c2c3df3 | 682 | |
83863f25 LA |
683 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
684 | def_bool y | |
685 | ||
8c2c3df3 CM |
686 | config ARCH_HAS_HOLES_MEMORYMODEL |
687 | def_bool y if SPARSEMEM | |
688 | ||
689 | config ARCH_SPARSEMEM_ENABLE | |
690 | def_bool y | |
691 | select SPARSEMEM_VMEMMAP_ENABLE | |
692 | ||
693 | config ARCH_SPARSEMEM_DEFAULT | |
694 | def_bool ARCH_SPARSEMEM_ENABLE | |
695 | ||
696 | config ARCH_SELECT_MEMORY_MODEL | |
697 | def_bool ARCH_SPARSEMEM_ENABLE | |
698 | ||
699 | config HAVE_ARCH_PFN_VALID | |
700 | def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM | |
701 | ||
702 | config HW_PERF_EVENTS | |
6475b2d8 MR |
703 | def_bool y |
704 | depends on ARM_PMU | |
8c2c3df3 | 705 | |
084bd298 SC |
706 | config SYS_SUPPORTS_HUGETLBFS |
707 | def_bool y | |
708 | ||
084bd298 | 709 | config ARCH_WANT_HUGE_PMD_SHARE |
21539939 | 710 | def_bool y if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36) |
084bd298 | 711 | |
a41dc0e8 CM |
712 | config ARCH_HAS_CACHE_LINE_SIZE |
713 | def_bool y | |
714 | ||
8c2c3df3 CM |
715 | source "mm/Kconfig" |
716 | ||
a1ae65b2 AT |
717 | config SECCOMP |
718 | bool "Enable seccomp to safely compute untrusted bytecode" | |
719 | ---help--- | |
720 | This kernel feature is useful for number crunching applications | |
721 | that may need to compute untrusted bytecode during their | |
722 | execution. By using pipes or other transports made available to | |
723 | the process as file descriptors supporting the read/write | |
724 | syscalls, it's possible to isolate those applications in | |
725 | their own address space using seccomp. Once seccomp is | |
726 | enabled via prctl(PR_SET_SECCOMP), it cannot be disabled | |
727 | and the task is only allowed to execute a few safe syscalls | |
728 | defined by each seccomp mode. | |
729 | ||
dfd57bc3 SS |
730 | config PARAVIRT |
731 | bool "Enable paravirtualization code" | |
732 | help | |
733 | This changes the kernel so it can modify itself when it is run | |
734 | under a hypervisor, potentially improving performance significantly | |
735 | over full virtualization. | |
736 | ||
737 | config PARAVIRT_TIME_ACCOUNTING | |
738 | bool "Paravirtual steal time accounting" | |
739 | select PARAVIRT | |
740 | default n | |
741 | help | |
742 | Select this option to enable fine granularity task steal time | |
743 | accounting. Time spent executing other tasks in parallel with | |
744 | the current vCPU is discounted from the vCPU power. To account for | |
745 | that, there can be a small performance impact. | |
746 | ||
747 | If in doubt, say N here. | |
748 | ||
d28f6df1 GL |
749 | config KEXEC |
750 | depends on PM_SLEEP_SMP | |
751 | select KEXEC_CORE | |
752 | bool "kexec system call" | |
753 | ---help--- | |
754 | kexec is a system call that implements the ability to shutdown your | |
755 | current kernel, and to start another kernel. It is like a reboot | |
756 | but it is independent of the system firmware. And like a reboot | |
757 | you can start any kernel with it, not just Linux. | |
758 | ||
e62aaeac AT |
759 | config CRASH_DUMP |
760 | bool "Build kdump crash kernel" | |
761 | help | |
762 | Generate crash dump after being started by kexec. This should | |
763 | be normally only set in special crash dump kernels which are | |
764 | loaded in the main kernel with kexec-tools into a specially | |
765 | reserved region and then later executed after a crash by | |
766 | kdump/kexec. | |
767 | ||
768 | For more details see Documentation/kdump/kdump.txt | |
769 | ||
aa42aa13 SS |
770 | config XEN_DOM0 |
771 | def_bool y | |
772 | depends on XEN | |
773 | ||
774 | config XEN | |
c2ba1f7d | 775 | bool "Xen guest support on ARM64" |
aa42aa13 | 776 | depends on ARM64 && OF |
83862ccf | 777 | select SWIOTLB_XEN |
dfd57bc3 | 778 | select PARAVIRT |
aa42aa13 SS |
779 | help |
780 | Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. | |
781 | ||
d03bb145 SC |
782 | config FORCE_MAX_ZONEORDER |
783 | int | |
784 | default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) | |
44eaacf1 | 785 | default "12" if (ARM64_16K_PAGES && TRANSPARENT_HUGEPAGE) |
d03bb145 | 786 | default "11" |
44eaacf1 SP |
787 | help |
788 | The kernel memory allocator divides physically contiguous memory | |
789 | blocks into "zones", where each zone is a power of two number of | |
790 | pages. This option selects the largest power of two that the kernel | |
791 | keeps in the memory allocator. If you need to allocate very large | |
792 | blocks of physically contiguous memory, then you may need to | |
793 | increase this value. | |
794 | ||
795 | This config option is actually maximum order plus one. For example, | |
796 | a value of 11 means that the largest free memory block is 2^10 pages. | |
797 | ||
798 | We make sure that we can allocate upto a HugePage size for each configuration. | |
799 | Hence we have : | |
800 | MAX_ORDER = (PMD_SHIFT - PAGE_SHIFT) + 1 => PAGE_SHIFT - 2 | |
801 | ||
802 | However for 4K, we choose a higher default value, 11 as opposed to 10, giving us | |
803 | 4M allocations matching the default size used by generic code. | |
d03bb145 | 804 | |
1b907f46 WD |
805 | menuconfig ARMV8_DEPRECATED |
806 | bool "Emulate deprecated/obsolete ARMv8 instructions" | |
807 | depends on COMPAT | |
808 | help | |
809 | Legacy software support may require certain instructions | |
810 | that have been deprecated or obsoleted in the architecture. | |
811 | ||
812 | Enable this config to enable selective emulation of these | |
813 | features. | |
814 | ||
815 | If unsure, say Y | |
816 | ||
817 | if ARMV8_DEPRECATED | |
818 | ||
819 | config SWP_EMULATION | |
820 | bool "Emulate SWP/SWPB instructions" | |
821 | help | |
822 | ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that | |
823 | they are always undefined. Say Y here to enable software | |
824 | emulation of these instructions for userspace using LDXR/STXR. | |
825 | ||
826 | In some older versions of glibc [<=2.8] SWP is used during futex | |
827 | trylock() operations with the assumption that the code will not | |
828 | be preempted. This invalid assumption may be more likely to fail | |
829 | with SWP emulation enabled, leading to deadlock of the user | |
830 | application. | |
831 | ||
832 | NOTE: when accessing uncached shared regions, LDXR/STXR rely | |
833 | on an external transaction monitoring block called a global | |
834 | monitor to maintain update atomicity. If your system does not | |
835 | implement a global monitor, this option can cause programs that | |
836 | perform SWP operations to uncached memory to deadlock. | |
837 | ||
838 | If unsure, say Y | |
839 | ||
840 | config CP15_BARRIER_EMULATION | |
841 | bool "Emulate CP15 Barrier instructions" | |
842 | help | |
843 | The CP15 barrier instructions - CP15ISB, CP15DSB, and | |
844 | CP15DMB - are deprecated in ARMv8 (and ARMv7). It is | |
845 | strongly recommended to use the ISB, DSB, and DMB | |
846 | instructions instead. | |
847 | ||
848 | Say Y here to enable software emulation of these | |
849 | instructions for AArch32 userspace code. When this option is | |
850 | enabled, CP15 barrier usage is traced which can help | |
851 | identify software that needs updating. | |
852 | ||
853 | If unsure, say Y | |
854 | ||
2d888f48 SP |
855 | config SETEND_EMULATION |
856 | bool "Emulate SETEND instruction" | |
857 | help | |
858 | The SETEND instruction alters the data-endianness of the | |
859 | AArch32 EL0, and is deprecated in ARMv8. | |
860 | ||
861 | Say Y here to enable software emulation of the instruction | |
862 | for AArch32 userspace code. | |
863 | ||
864 | Note: All the cpus on the system must have mixed endian support at EL0 | |
865 | for this feature to be enabled. If a new CPU - which doesn't support mixed | |
866 | endian - is hotplugged in after this feature has been enabled, there could | |
867 | be unexpected results in the applications. | |
868 | ||
869 | If unsure, say Y | |
1b907f46 WD |
870 | endif |
871 | ||
ba42822a CM |
872 | config ARM64_SW_TTBR0_PAN |
873 | bool "Emulate Privileged Access Never using TTBR0_EL1 switching" | |
874 | help | |
875 | Enabling this option prevents the kernel from accessing | |
876 | user-space memory directly by pointing TTBR0_EL1 to a reserved | |
877 | zeroed area and reserved ASID. The user access routines | |
878 | restore the valid TTBR0_EL1 temporarily. | |
879 | ||
0e4a0709 WD |
880 | menu "ARMv8.1 architectural features" |
881 | ||
882 | config ARM64_HW_AFDBM | |
883 | bool "Support for hardware updates of the Access and Dirty page flags" | |
884 | default y | |
885 | help | |
886 | The ARMv8.1 architecture extensions introduce support for | |
887 | hardware updates of the access and dirty information in page | |
888 | table entries. When enabled in TCR_EL1 (HA and HD bits) on | |
889 | capable processors, accesses to pages with PTE_AF cleared will | |
890 | set this bit instead of raising an access flag fault. | |
891 | Similarly, writes to read-only pages with the DBM bit set will | |
892 | clear the read-only bit (AP[2]) instead of raising a | |
893 | permission fault. | |
894 | ||
895 | Kernels built with this configuration option enabled continue | |
896 | to work on pre-ARMv8.1 hardware and the performance impact is | |
897 | minimal. If unsure, say Y. | |
898 | ||
899 | config ARM64_PAN | |
900 | bool "Enable support for Privileged Access Never (PAN)" | |
901 | default y | |
902 | help | |
903 | Privileged Access Never (PAN; part of the ARMv8.1 Extensions) | |
904 | prevents the kernel or hypervisor from accessing user-space (EL0) | |
905 | memory directly. | |
906 | ||
907 | Choosing this option will cause any unprotected (not using | |
908 | copy_to_user et al) memory access to fail with a permission fault. | |
909 | ||
910 | The feature is detected at runtime, and will remain as a 'nop' | |
911 | instruction if the cpu does not implement the feature. | |
912 | ||
913 | config ARM64_LSE_ATOMICS | |
914 | bool "Atomic instructions" | |
915 | help | |
916 | As part of the Large System Extensions, ARMv8.1 introduces new | |
917 | atomic instructions that are designed specifically to scale in | |
918 | very large systems. | |
919 | ||
920 | Say Y here to make use of these instructions for the in-kernel | |
921 | atomic routines. This incurs a small overhead on CPUs that do | |
922 | not support these instructions and requires the kernel to be | |
923 | built with binutils >= 2.25. | |
924 | ||
1f364c8c MZ |
925 | config ARM64_VHE |
926 | bool "Enable support for Virtualization Host Extensions (VHE)" | |
927 | default y | |
928 | help | |
929 | Virtualization Host Extensions (VHE) allow the kernel to run | |
930 | directly at EL2 (instead of EL1) on processors that support | |
931 | it. This leads to better performance for KVM, as they reduce | |
932 | the cost of the world switch. | |
933 | ||
934 | Selecting this option allows the VHE feature to be detected | |
935 | at runtime, and does not affect processors that do not | |
936 | implement this feature. | |
937 | ||
0e4a0709 WD |
938 | endmenu |
939 | ||
f993318b WD |
940 | menu "ARMv8.2 architectural features" |
941 | ||
57f4959b JM |
942 | config ARM64_UAO |
943 | bool "Enable support for User Access Override (UAO)" | |
944 | default y | |
945 | help | |
946 | User Access Override (UAO; part of the ARMv8.2 Extensions) | |
947 | causes the 'unprivileged' variant of the load/store instructions to | |
948 | be overriden to be privileged. | |
949 | ||
950 | This option changes get_user() and friends to use the 'unprivileged' | |
951 | variant of the load/store instructions. This ensures that user-space | |
952 | really did have access to the supplied memory. When addr_limit is | |
953 | set to kernel memory the UAO bit will be set, allowing privileged | |
954 | access to kernel memory. | |
955 | ||
956 | Choosing this option will cause copy_to_user() et al to use user-space | |
957 | memory permissions. | |
958 | ||
959 | The feature is detected at runtime, the kernel will use the | |
960 | regular load/store instructions if the cpu does not implement the | |
961 | feature. | |
962 | ||
f993318b WD |
963 | endmenu |
964 | ||
fd045f6c AB |
965 | config ARM64_MODULE_CMODEL_LARGE |
966 | bool | |
967 | ||
968 | config ARM64_MODULE_PLTS | |
969 | bool | |
970 | select ARM64_MODULE_CMODEL_LARGE | |
971 | select HAVE_MOD_ARCH_SPECIFIC | |
972 | ||
1e48ef7f AB |
973 | config RELOCATABLE |
974 | bool | |
975 | help | |
976 | This builds the kernel as a Position Independent Executable (PIE), | |
977 | which retains all relocation metadata required to relocate the | |
978 | kernel binary at runtime to a different virtual address than the | |
979 | address it was linked at. | |
980 | Since AArch64 uses the RELA relocation format, this requires a | |
981 | relocation pass at runtime even if the kernel is loaded at the | |
982 | same address it was linked at. | |
983 | ||
f80fb3a3 AB |
984 | config RANDOMIZE_BASE |
985 | bool "Randomize the address of the kernel image" | |
b9c220b5 | 986 | select ARM64_MODULE_PLTS if MODULES |
f80fb3a3 AB |
987 | select RELOCATABLE |
988 | help | |
989 | Randomizes the virtual address at which the kernel image is | |
990 | loaded, as a security feature that deters exploit attempts | |
991 | relying on knowledge of the location of kernel internals. | |
992 | ||
993 | It is the bootloader's job to provide entropy, by passing a | |
994 | random u64 value in /chosen/kaslr-seed at kernel entry. | |
995 | ||
2b5fe07a AB |
996 | When booting via the UEFI stub, it will invoke the firmware's |
997 | EFI_RNG_PROTOCOL implementation (if available) to supply entropy | |
998 | to the kernel proper. In addition, it will randomise the physical | |
999 | location of the kernel Image as well. | |
1000 | ||
f80fb3a3 AB |
1001 | If unsure, say N. |
1002 | ||
1003 | config RANDOMIZE_MODULE_REGION_FULL | |
1004 | bool "Randomize the module region independently from the core kernel" | |
e71a4e1b | 1005 | depends on RANDOMIZE_BASE |
f80fb3a3 AB |
1006 | default y |
1007 | help | |
1008 | Randomizes the location of the module region without considering the | |
1009 | location of the core kernel. This way, it is impossible for modules | |
1010 | to leak information about the location of core kernel data structures | |
1011 | but it does imply that function calls between modules and the core | |
1012 | kernel will need to be resolved via veneers in the module PLT. | |
1013 | ||
1014 | When this option is not set, the module region will be randomized over | |
1015 | a limited range that contains the [_stext, _etext] interval of the | |
1016 | core kernel, so branch relocations are always in range. | |
1017 | ||
8c2c3df3 CM |
1018 | endmenu |
1019 | ||
1020 | menu "Boot options" | |
1021 | ||
5e89c55e LP |
1022 | config ARM64_ACPI_PARKING_PROTOCOL |
1023 | bool "Enable support for the ARM64 ACPI parking protocol" | |
1024 | depends on ACPI | |
1025 | help | |
1026 | Enable support for the ARM64 ACPI parking protocol. If disabled | |
1027 | the kernel will not allow booting through the ARM64 ACPI parking | |
1028 | protocol even if the corresponding data is present in the ACPI | |
1029 | MADT table. | |
1030 | ||
8c2c3df3 CM |
1031 | config CMDLINE |
1032 | string "Default kernel command string" | |
1033 | default "" | |
1034 | help | |
1035 | Provide a set of default command-line options at build time by | |
1036 | entering them here. As a minimum, you should specify the the | |
1037 | root device (e.g. root=/dev/nfs). | |
1038 | ||
1039 | config CMDLINE_FORCE | |
1040 | bool "Always use the default kernel command string" | |
1041 | help | |
1042 | Always use the default kernel command string, even if the boot | |
1043 | loader passes other arguments to the kernel. | |
1044 | This is useful if you cannot or don't want to change the | |
1045 | command-line options your boot loader passes to the kernel. | |
1046 | ||
f4f75ad5 AB |
1047 | config EFI_STUB |
1048 | bool | |
1049 | ||
f84d0275 MS |
1050 | config EFI |
1051 | bool "UEFI runtime support" | |
1052 | depends on OF && !CPU_BIG_ENDIAN | |
1053 | select LIBFDT | |
1054 | select UCS2_STRING | |
1055 | select EFI_PARAMS_FROM_FDT | |
e15dd494 | 1056 | select EFI_RUNTIME_WRAPPERS |
f4f75ad5 AB |
1057 | select EFI_STUB |
1058 | select EFI_ARMSTUB | |
f84d0275 MS |
1059 | default y |
1060 | help | |
1061 | This option provides support for runtime services provided | |
1062 | by UEFI firmware (such as non-volatile variables, realtime | |
3c7f2550 MS |
1063 | clock, and platform reset). A UEFI stub is also provided to |
1064 | allow the kernel to be booted as an EFI application. This | |
1065 | is only useful on systems that have UEFI firmware. | |
f84d0275 | 1066 | |
d1ae8c00 YL |
1067 | config DMI |
1068 | bool "Enable support for SMBIOS (DMI) tables" | |
1069 | depends on EFI | |
1070 | default y | |
1071 | help | |
1072 | This enables SMBIOS/DMI feature for systems. | |
1073 | ||
1074 | This option is only useful on systems that have UEFI firmware. | |
1075 | However, even with this option, the resultant kernel should | |
1076 | continue to boot on existing non-UEFI platforms. | |
1077 | ||
8c2c3df3 CM |
1078 | endmenu |
1079 | ||
1080 | menu "Userspace binary formats" | |
1081 | ||
1082 | source "fs/Kconfig.binfmt" | |
1083 | ||
1084 | config COMPAT | |
1085 | bool "Kernel support for 32-bit EL0" | |
755e70b7 | 1086 | depends on ARM64_4K_PAGES || EXPERT |
2e449048 | 1087 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
af1839eb | 1088 | select HAVE_UID16 |
84b9e9b4 | 1089 | select OLD_SIGSUSPEND3 |
51682036 | 1090 | select COMPAT_OLD_SIGACTION |
8c2c3df3 CM |
1091 | help |
1092 | This option enables support for a 32-bit EL0 running under a 64-bit | |
1093 | kernel at EL1. AArch32-specific components such as system calls, | |
1094 | the user helper functions, VFP support and the ptrace interface are | |
1095 | handled appropriately by the kernel. | |
1096 | ||
44eaacf1 SP |
1097 | If you use a page size other than 4KB (i.e, 16KB or 64KB), please be aware |
1098 | that you will only be able to execute AArch32 binaries that were compiled | |
1099 | with page size aligned segments. | |
a8fcd8b1 | 1100 | |
8c2c3df3 CM |
1101 | If you want to execute 32-bit userspace applications, say Y. |
1102 | ||
1103 | config SYSVIPC_COMPAT | |
1104 | def_bool y | |
1105 | depends on COMPAT && SYSVIPC | |
1106 | ||
1107 | endmenu | |
1108 | ||
166936ba LP |
1109 | menu "Power management options" |
1110 | ||
1111 | source "kernel/power/Kconfig" | |
1112 | ||
82869ac5 JM |
1113 | config ARCH_HIBERNATION_POSSIBLE |
1114 | def_bool y | |
1115 | depends on CPU_PM | |
1116 | ||
1117 | config ARCH_HIBERNATION_HEADER | |
1118 | def_bool y | |
1119 | depends on HIBERNATION | |
1120 | ||
166936ba LP |
1121 | config ARCH_SUSPEND_POSSIBLE |
1122 | def_bool y | |
1123 | ||
166936ba LP |
1124 | endmenu |
1125 | ||
1307220d LP |
1126 | menu "CPU Power Management" |
1127 | ||
1128 | source "drivers/cpuidle/Kconfig" | |
1129 | ||
52e7e816 RH |
1130 | source "drivers/cpufreq/Kconfig" |
1131 | ||
1132 | endmenu | |
1133 | ||
8c2c3df3 CM |
1134 | source "net/Kconfig" |
1135 | ||
1136 | source "drivers/Kconfig" | |
1137 | ||
f84d0275 MS |
1138 | source "drivers/firmware/Kconfig" |
1139 | ||
b6a02173 GG |
1140 | source "drivers/acpi/Kconfig" |
1141 | ||
8c2c3df3 CM |
1142 | source "fs/Kconfig" |
1143 | ||
c3eb5b14 MZ |
1144 | source "arch/arm64/kvm/Kconfig" |
1145 | ||
8c2c3df3 CM |
1146 | source "arch/arm64/Kconfig.debug" |
1147 | ||
1148 | source "security/Kconfig" | |
1149 | ||
1150 | source "crypto/Kconfig" | |
2c98833a AB |
1151 | if CRYPTO |
1152 | source "arch/arm64/crypto/Kconfig" | |
1153 | endif | |
8c2c3df3 CM |
1154 | |
1155 | source "lib/Kconfig" |