1 # SPDX-License-Identifier: GPL-2.0-only !! 1 #
2 config ARM64 !! 2 # For a description of the syntax of this configuration file,
3 def_bool y !! 3 # see Documentation/kbuild/kconfig-language.txt.
4 select ACPI_APMT if ACPI !! 4 #
5 select ACPI_CCA_REQUIRED if ACPI !! 5 config ALPHA
6 select ACPI_GENERIC_GSI if ACPI !! 6 bool
7 select ACPI_GTDT if ACPI !! 7 default y
8 select ACPI_HOTPLUG_CPU if ACPI_PROCES <<
9 select ACPI_IORT if ACPI <<
10 select ACPI_REDUCED_HARDWARE_ONLY if A <<
11 select ACPI_MCFG if (ACPI && PCI) <<
12 select ACPI_SPCR_TABLE if ACPI <<
13 select ACPI_PPTT if ACPI <<
14 select ARCH_HAS_DEBUG_WX <<
15 select ARCH_BINFMT_ELF_EXTRA_PHDRS <<
16 select ARCH_BINFMT_ELF_STATE <<
17 select ARCH_CORRECT_STACKTRACE_ON_KRET <<
18 select ARCH_ENABLE_HUGEPAGE_MIGRATION <<
19 select ARCH_ENABLE_MEMORY_HOTPLUG <<
20 select ARCH_ENABLE_MEMORY_HOTREMOVE <<
21 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if <<
22 select ARCH_ENABLE_THP_MIGRATION if TR <<
23 select ARCH_HAS_CACHE_LINE_SIZE <<
24 select ARCH_HAS_CURRENT_STACK_POINTER <<
25 select ARCH_HAS_DEBUG_VIRTUAL <<
26 select ARCH_HAS_DEBUG_VM_PGTABLE <<
27 select ARCH_HAS_DMA_OPS if XEN <<
28 select ARCH_HAS_DMA_PREP_COHERENT <<
29 select ARCH_HAS_ACPI_TABLE_UPGRADE if <<
30 select ARCH_HAS_FAST_MULTIPLIER <<
31 select ARCH_HAS_FORTIFY_SOURCE <<
32 select ARCH_HAS_GCOV_PROFILE_ALL <<
33 select ARCH_HAS_GIGANTIC_PAGE <<
34 select ARCH_HAS_KCOV <<
35 select ARCH_HAS_KERNEL_FPU_SUPPORT if <<
36 select ARCH_HAS_KEEPINITRD <<
37 select ARCH_HAS_MEMBARRIER_SYNC_CORE <<
38 select ARCH_HAS_MEM_ENCRYPT <<
39 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS <<
40 select ARCH_HAS_NON_OVERLAPPING_ADDRES <<
41 select ARCH_HAS_PTE_DEVMAP <<
42 select ARCH_HAS_PTE_SPECIAL <<
43 select ARCH_HAS_HW_PTE_YOUNG <<
44 select ARCH_HAS_SETUP_DMA_OPS <<
45 select ARCH_HAS_SET_DIRECT_MAP <<
46 select ARCH_HAS_SET_MEMORY <<
47 select ARCH_STACKWALK <<
48 select ARCH_HAS_STRICT_KERNEL_RWX <<
49 select ARCH_HAS_STRICT_MODULE_RWX <<
50 select ARCH_HAS_SYNC_DMA_FOR_DEVICE <<
51 select ARCH_HAS_SYNC_DMA_FOR_CPU <<
52 select ARCH_HAS_SYSCALL_WRAPPER <<
53 select ARCH_HAS_TICK_BROADCAST if GENE <<
54 select ARCH_HAS_ZONE_DMA_SET if EXPERT <<
55 select ARCH_HAVE_ELF_PROT <<
56 select ARCH_HAVE_NMI_SAFE_CMPXCHG <<
57 select ARCH_HAVE_TRACE_MMIO_ACCESS <<
58 select ARCH_INLINE_READ_LOCK if !PREEM <<
59 select ARCH_INLINE_READ_LOCK_BH if !PR <<
60 select ARCH_INLINE_READ_LOCK_IRQ if !P <<
61 select ARCH_INLINE_READ_LOCK_IRQSAVE i <<
62 select ARCH_INLINE_READ_UNLOCK if !PRE <<
63 select ARCH_INLINE_READ_UNLOCK_BH if ! <<
64 select ARCH_INLINE_READ_UNLOCK_IRQ if <<
65 select ARCH_INLINE_READ_UNLOCK_IRQREST <<
66 select ARCH_INLINE_WRITE_LOCK if !PREE <<
67 select ARCH_INLINE_WRITE_LOCK_BH if !P <<
68 select ARCH_INLINE_WRITE_LOCK_IRQ if ! <<
69 select ARCH_INLINE_WRITE_LOCK_IRQSAVE <<
70 select ARCH_INLINE_WRITE_UNLOCK if !PR <<
71 select ARCH_INLINE_WRITE_UNLOCK_BH if <<
72 select ARCH_INLINE_WRITE_UNLOCK_IRQ if <<
73 select ARCH_INLINE_WRITE_UNLOCK_IRQRES <<
74 select ARCH_INLINE_SPIN_TRYLOCK if !PR <<
75 select ARCH_INLINE_SPIN_TRYLOCK_BH if <<
76 select ARCH_INLINE_SPIN_LOCK if !PREEM <<
77 select ARCH_INLINE_SPIN_LOCK_BH if !PR <<
78 select ARCH_INLINE_SPIN_LOCK_IRQ if !P <<
79 select ARCH_INLINE_SPIN_LOCK_IRQSAVE i <<
80 select ARCH_INLINE_SPIN_UNLOCK if !PRE <<
81 select ARCH_INLINE_SPIN_UNLOCK_BH if ! <<
82 select ARCH_INLINE_SPIN_UNLOCK_IRQ if <<
83 select ARCH_INLINE_SPIN_UNLOCK_IRQREST <<
84 select ARCH_KEEP_MEMBLOCK <<
85 select ARCH_MHP_MEMMAP_ON_MEMORY_ENABL <<
86 select ARCH_USE_CMPXCHG_LOCKREF <<
87 select ARCH_USE_GNU_PROPERTY <<
88 select ARCH_USE_MEMTEST <<
89 select ARCH_USE_QUEUED_RWLOCKS <<
90 select ARCH_USE_QUEUED_SPINLOCKS <<
91 select ARCH_USE_SYM_ANNOTATIONS <<
92 select ARCH_SUPPORTS_DEBUG_PAGEALLOC <<
93 select ARCH_SUPPORTS_HUGETLBFS <<
94 select ARCH_SUPPORTS_MEMORY_FAILURE <<
95 select ARCH_SUPPORTS_SHADOW_CALL_STACK <<
96 select ARCH_SUPPORTS_LTO_CLANG if CPU_ <<
97 select ARCH_SUPPORTS_LTO_CLANG_THIN <<
98 select ARCH_SUPPORTS_CFI_CLANG <<
99 select ARCH_SUPPORTS_ATOMIC_RMW <<
100 select ARCH_SUPPORTS_INT128 if CC_HAS_ <<
101 select ARCH_SUPPORTS_NUMA_BALANCING <<
102 select ARCH_SUPPORTS_PAGE_TABLE_CHECK <<
103 select ARCH_SUPPORTS_PER_VMA_LOCK <<
104 select ARCH_SUPPORTS_HUGE_PFNMAP if TR <<
105 select ARCH_SUPPORTS_RT <<
106 select ARCH_WANT_BATCHED_UNMAP_TLB_FLU <<
107 select ARCH_WANT_COMPAT_IPC_PARSE_VERS <<
108 select ARCH_WANT_DEFAULT_BPF_JIT <<
109 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_ <<
110 select ARCH_WANT_FRAME_POINTERS <<
111 select ARCH_WANT_HUGE_PMD_SHARE if ARM <<
112 select ARCH_WANT_LD_ORPHAN_WARN <<
113 select ARCH_WANTS_EXECMEM_LATE if EXEC <<
114 select ARCH_WANTS_NO_INSTR <<
115 select ARCH_WANTS_THP_SWAP if ARM64_4K <<
116 select ARCH_HAS_UBSAN <<
117 select ARM_AMBA <<
118 select ARM_ARCH_TIMER <<
119 select ARM_GIC <<
120 select AUDIT_ARCH_COMPAT_GENERIC <<
121 select ARM_GIC_V2M if PCI <<
122 select ARM_GIC_V3 <<
123 select ARM_GIC_V3_ITS if PCI <<
124 select ARM_PSCI_FW <<
125 select BUILDTIME_TABLE_SORT <<
126 select CLONE_BACKWARDS <<
127 select COMMON_CLK <<
128 select CPU_PM if (SUSPEND || CPU_IDLE) <<
129 select CPUMASK_OFFSTACK if NR_CPUS > 2 <<
130 select CRC32 <<
131 select DCACHE_WORD_ACCESS <<
132 select DYNAMIC_FTRACE if FUNCTION_TRAC <<
133 select DMA_BOUNCE_UNALIGNED_KMALLOC <<
134 select DMA_DIRECT_REMAP <<
135 select EDAC_SUPPORT <<
136 select FRAME_POINTER <<
137 select FUNCTION_ALIGNMENT_4B <<
138 select FUNCTION_ALIGNMENT_8B if DYNAMI <<
139 select GENERIC_ALLOCATOR <<
140 select GENERIC_ARCH_TOPOLOGY <<
141 select GENERIC_CLOCKEVENTS_BROADCAST <<
142 select GENERIC_CPU_AUTOPROBE <<
143 select GENERIC_CPU_DEVICES <<
144 select GENERIC_CPU_VULNERABILITIES <<
145 select GENERIC_EARLY_IOREMAP <<
146 select GENERIC_IDLE_POLL_SETUP <<
147 select GENERIC_IOREMAP <<
148 select GENERIC_IRQ_IPI <<
149 select GENERIC_IRQ_PROBE <<
150 select GENERIC_IRQ_SHOW <<
151 select GENERIC_IRQ_SHOW_LEVEL <<
152 select GENERIC_LIB_DEVMEM_IS_ALLOWED <<
153 select GENERIC_PCI_IOMAP <<
154 select GENERIC_PTDUMP <<
155 select GENERIC_SCHED_CLOCK <<
156 select GENERIC_SMP_IDLE_THREAD <<
157 select GENERIC_TIME_VSYSCALL <<
158 select GENERIC_GETTIMEOFDAY <<
159 select GENERIC_VDSO_TIME_NS <<
160 select HARDIRQS_SW_RESEND <<
161 select HAS_IOPORT <<
162 select HAVE_MOVE_PMD <<
163 select HAVE_MOVE_PUD <<
164 select HAVE_PCI <<
165 select HAVE_ACPI_APEI if (ACPI && EFI) <<
166 select HAVE_ALIGNED_STRUCT_PAGE <<
167 select HAVE_ARCH_AUDITSYSCALL <<
168 select HAVE_ARCH_BITREVERSE <<
169 select HAVE_ARCH_COMPILER_H <<
170 select HAVE_ARCH_HUGE_VMALLOC <<
171 select HAVE_ARCH_HUGE_VMAP <<
172 select HAVE_ARCH_JUMP_LABEL <<
173 select HAVE_ARCH_JUMP_LABEL_RELATIVE <<
174 select HAVE_ARCH_KASAN <<
175 select HAVE_ARCH_KASAN_VMALLOC <<
176 select HAVE_ARCH_KASAN_SW_TAGS <<
177 select HAVE_ARCH_KASAN_HW_TAGS if ARM6 <<
178 # Some instrumentation may be unsound, <<
179 select HAVE_ARCH_KCSAN if EXPERT <<
180 select HAVE_ARCH_KFENCE <<
181 select HAVE_ARCH_KGDB <<
182 select HAVE_ARCH_MMAP_RND_BITS <<
183 select HAVE_ARCH_MMAP_RND_COMPAT_BITS <<
184 select HAVE_ARCH_PREL32_RELOCATIONS <<
185 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS <<
186 select HAVE_ARCH_SECCOMP_FILTER <<
187 select HAVE_ARCH_STACKLEAK <<
188 select HAVE_ARCH_THREAD_STRUCT_WHITELI <<
189 select HAVE_ARCH_TRACEHOOK <<
190 select HAVE_ARCH_TRANSPARENT_HUGEPAGE <<
191 select HAVE_ARCH_VMAP_STACK <<
192 select HAVE_ARM_SMCCC <<
193 select HAVE_ASM_MODVERSIONS <<
194 select HAVE_EBPF_JIT <<
195 select HAVE_C_RECORDMCOUNT <<
196 select HAVE_CMPXCHG_DOUBLE <<
197 select HAVE_CMPXCHG_LOCAL <<
198 select HAVE_CONTEXT_TRACKING_USER <<
199 select HAVE_DEBUG_KMEMLEAK <<
200 select HAVE_DMA_CONTIGUOUS <<
201 select HAVE_DYNAMIC_FTRACE <<
202 select HAVE_DYNAMIC_FTRACE_WITH_ARGS \ <<
203 if (GCC_SUPPORTS_DYNAMIC_FTRAC <<
204 CLANG_SUPPORTS_DYNAMIC_FTR <<
205 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT <<
206 if DYNAMIC_FTRACE_WITH_ARGS && <<
207 select HAVE_DYNAMIC_FTRACE_WITH_CALL_O <<
208 if (DYNAMIC_FTRACE_WITH_ARGS & <<
209 (CC_IS_CLANG || !CC_OPTIMI <<
210 select FTRACE_MCOUNT_USE_PATCHABLE_FUN <<
211 if DYNAMIC_FTRACE_WITH_ARGS <<
212 select HAVE_SAMPLE_FTRACE_DIRECT <<
213 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI <<
214 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
215 select HAVE_GUP_FAST <<
216 select HAVE_FTRACE_MCOUNT_RECORD <<
217 select HAVE_FUNCTION_TRACER <<
218 select HAVE_FUNCTION_ERROR_INJECTION <<
219 select HAVE_FUNCTION_GRAPH_TRACER <<
220 select HAVE_FUNCTION_GRAPH_RETVAL <<
221 select HAVE_GCC_PLUGINS <<
222 select HAVE_HARDLOCKUP_DETECTOR_PERF i <<
223 HW_PERF_EVENTS && HAVE_PERF_EV <<
224 select HAVE_HW_BREAKPOINT if PERF_EVEN <<
225 select HAVE_IOREMAP_PROT <<
226 select HAVE_IRQ_TIME_ACCOUNTING <<
227 select HAVE_MOD_ARCH_SPECIFIC <<
228 select HAVE_NMI <<
229 select HAVE_PERF_EVENTS <<
230 select HAVE_PERF_EVENTS_NMI if ARM64_P <<
231 select HAVE_PERF_REGS <<
232 select HAVE_PERF_USER_STACK_DUMP <<
233 select HAVE_PREEMPT_DYNAMIC_KEY <<
234 select HAVE_REGS_AND_STACK_ACCESS_API <<
235 select HAVE_POSIX_CPU_TIMERS_TASK_WORK <<
236 select HAVE_FUNCTION_ARG_ACCESS_API <<
237 select MMU_GATHER_RCU_TABLE_FREE <<
238 select HAVE_RSEQ <<
239 select HAVE_RUST if RUSTC_SUPPORTS_ARM <<
240 select HAVE_STACKPROTECTOR <<
241 select HAVE_SYSCALL_TRACEPOINTS <<
242 select HAVE_KPROBES <<
243 select HAVE_KRETPROBES <<
244 select HAVE_GENERIC_VDSO <<
245 select HOTPLUG_CORE_SYNC_DEAD if HOTPL <<
246 select IRQ_DOMAIN <<
247 select IRQ_FORCED_THREADING <<
248 select KASAN_VMALLOC if KASAN <<
249 select LOCK_MM_AND_FIND_VMA <<
250 select MODULES_USE_ELF_RELA <<
251 select NEED_DMA_MAP_STATE <<
252 select NEED_SG_DMA_LENGTH <<
253 select OF <<
254 select OF_EARLY_FLATTREE <<
255 select PCI_DOMAINS_GENERIC if PCI <<
256 select PCI_ECAM if (ACPI && PCI) <<
257 select PCI_SYSCALL if PCI <<
258 select POWER_RESET <<
259 select POWER_SUPPLY <<
260 select SPARSE_IRQ <<
261 select SWIOTLB <<
262 select SYSCTL_EXCEPTION_TRACE <<
263 select THREAD_INFO_IN_TASK <<
264 select HAVE_ARCH_USERFAULTFD_MINOR if <<
265 select HAVE_ARCH_USERFAULTFD_WP if USE <<
266 select TRACE_IRQFLAGS_SUPPORT <<
267 select TRACE_IRQFLAGS_NMI_SUPPORT <<
268 select HAVE_SOFTIRQ_ON_OWN_STACK <<
269 select USER_STACKTRACE_SUPPORT <<
270 select VDSO_GETRANDOM <<
271 help 8 help
272 ARM 64-bit (AArch64) Linux support. !! 9 The Alpha is a 64-bit general-purpose processor designed and
273 !! 10 marketed by the Digital Equipment Corporation of blessed memory,
274 config RUSTC_SUPPORTS_ARM64 !! 11 now Hewlett-Packard. The Alpha Linux project has a home page at
275 def_bool y !! 12 <http://www.alphalinux.org/>.
276 depends on CPU_LITTLE_ENDIAN <<
277 # Shadow call stack is only supported <<
278 # <<
279 # When using the UNWIND_PATCH_PAC_INTO <<
280 # required due to use of the -Zfixed-x <<
281 # <<
282 # Otherwise, rustc version 1.82+ is re <<
283 # -Zsanitizer=shadow-call-stack flag. <<
284 depends on !SHADOW_CALL_STACK || RUSTC <<
285 <<
286 config CLANG_SUPPORTS_DYNAMIC_FTRACE_WITH_ARGS <<
287 def_bool CC_IS_CLANG <<
288 # https://github.com/ClangBuiltLinux/l <<
289 depends on AS_IS_GNU || (AS_IS_LLVM && <<
290 <<
291 config GCC_SUPPORTS_DYNAMIC_FTRACE_WITH_ARGS <<
292 def_bool CC_IS_GCC <<
293 depends on $(cc-option,-fpatchable-fun <<
294 13
295 config 64BIT 14 config 64BIT
296 def_bool y 15 def_bool y
297 16
298 config MMU 17 config MMU
299 def_bool y <<
300 <<
301 config ARM64_CONT_PTE_SHIFT <<
302 int <<
303 default 5 if PAGE_SIZE_64KB <<
304 default 7 if PAGE_SIZE_16KB <<
305 default 4 <<
306 <<
307 config ARM64_CONT_PMD_SHIFT <<
308 int <<
309 default 5 if PAGE_SIZE_64KB <<
310 default 5 if PAGE_SIZE_16KB <<
311 default 4 <<
312 <<
313 config ARCH_MMAP_RND_BITS_MIN <<
314 default 14 if PAGE_SIZE_64KB <<
315 default 16 if PAGE_SIZE_16KB <<
316 default 18 <<
317 <<
318 # max bits determined by the following formula <<
319 # VA_BITS - PAGE_SHIFT - 3 <<
320 config ARCH_MMAP_RND_BITS_MAX <<
321 default 19 if ARM64_VA_BITS=36 <<
322 default 24 if ARM64_VA_BITS=39 <<
323 default 27 if ARM64_VA_BITS=42 <<
324 default 30 if ARM64_VA_BITS=47 <<
325 default 29 if ARM64_VA_BITS=48 && ARM6 <<
326 default 31 if ARM64_VA_BITS=48 && ARM6 <<
327 default 33 if ARM64_VA_BITS=48 <<
328 default 14 if ARM64_64K_PAGES <<
329 default 16 if ARM64_16K_PAGES <<
330 default 18 <<
331 <<
332 config ARCH_MMAP_RND_COMPAT_BITS_MIN <<
333 default 7 if ARM64_64K_PAGES <<
334 default 9 if ARM64_16K_PAGES <<
335 default 11 <<
336 <<
337 config ARCH_MMAP_RND_COMPAT_BITS_MAX <<
338 default 16 <<
339 <<
340 config NO_IOPORT_MAP <<
341 def_bool y if !PCI <<
342 <<
343 config STACKTRACE_SUPPORT <<
344 def_bool y <<
345 <<
346 config ILLEGAL_POINTER_VALUE <<
347 hex <<
348 default 0xdead000000000000 <<
349 <<
350 config LOCKDEP_SUPPORT <<
351 def_bool y <<
352 <<
353 config GENERIC_BUG <<
354 def_bool y <<
355 depends on BUG <<
356 <<
357 config GENERIC_BUG_RELATIVE_POINTERS <<
358 def_bool y <<
359 depends on GENERIC_BUG <<
360 <<
361 config GENERIC_HWEIGHT <<
362 def_bool y <<
363 <<
364 config GENERIC_CSUM <<
365 def_bool y <<
366 <<
367 config GENERIC_CALIBRATE_DELAY <<
368 def_bool y <<
369 <<
370 config SMP <<
371 def_bool y <<
372 <<
373 config KERNEL_MODE_NEON <<
374 def_bool y <<
375 <<
376 config FIX_EARLYCON_MEM <<
377 def_bool y <<
378 <<
379 config PGTABLE_LEVELS <<
380 int <<
381 default 2 if ARM64_16K_PAGES && ARM64_ <<
382 default 2 if ARM64_64K_PAGES && ARM64_ <<
383 default 3 if ARM64_64K_PAGES && (ARM64 <<
384 default 3 if ARM64_4K_PAGES && ARM64_V <<
385 default 3 if ARM64_16K_PAGES && ARM64_ <<
386 default 4 if ARM64_16K_PAGES && (ARM64 <<
387 default 4 if !ARM64_64K_PAGES && ARM64 <<
388 default 5 if ARM64_4K_PAGES && ARM64_V <<
389 <<
390 config ARCH_SUPPORTS_UPROBES <<
391 def_bool y <<
392 <<
393 config ARCH_PROC_KCORE_TEXT <<
394 def_bool y <<
395 <<
396 config BROKEN_GAS_INST <<
397 def_bool !$(as-instr,1:\n.inst 0\n.rep <<
398 <<
399 config BUILTIN_RETURN_ADDRESS_STRIPS_PAC <<
400 bool 18 bool
401 # Clang's __builtin_return_address() s !! 19 default y
402 # https://github.com/llvm/llvm-project <<
403 default y if CC_IS_CLANG <<
404 # GCC's __builtin_return_address() str <<
405 # and this was backported to 10.2.0, 9 <<
406 # https://gcc.gnu.org/bugzilla/show_bu <<
407 default y if CC_IS_GCC && (GCC_VERSION <<
408 default y if CC_IS_GCC && (GCC_VERSION <<
409 default y if CC_IS_GCC && (GCC_VERSION <<
410 default y if CC_IS_GCC && (GCC_VERSION <<
411 default n <<
412 <<
413 config KASAN_SHADOW_OFFSET <<
414 hex <<
415 depends on KASAN_GENERIC || KASAN_SW_T <<
416 default 0xdfff800000000000 if (ARM64_V <<
417 default 0xdfffc00000000000 if (ARM64_V <<
418 default 0xdffffe0000000000 if ARM64_VA <<
419 default 0xdfffffc000000000 if ARM64_VA <<
420 default 0xdffffff800000000 if ARM64_VA <<
421 default 0xefff800000000000 if (ARM64_V <<
422 default 0xefffc00000000000 if (ARM64_V <<
423 default 0xeffffe0000000000 if ARM64_VA <<
424 default 0xefffffc000000000 if ARM64_VA <<
425 default 0xeffffff800000000 if ARM64_VA <<
426 default 0xffffffffffffffff <<
427 20
428 config UNWIND_TABLES !! 21 config UID16
429 bool 22 bool
430 23
431 source "arch/arm64/Kconfig.platforms" !! 24 config RWSEM_GENERIC_SPINLOCK
432 !! 25 bool
433 menu "Kernel Features" <<
434 <<
435 menu "ARM errata workarounds via the alternati <<
436 26
437 config AMPERE_ERRATUM_AC03_CPU_38 !! 27 config RWSEM_XCHGADD_ALGORITHM
438 bool "AmpereOne: AC03_CPU_38: Certain !! 28 bool
439 default y 29 default y
440 help <<
441 This option adds an alternative code <<
442 errata AC03_CPU_38 and AC04_CPU_10 o <<
443 <<
444 The affected design reports FEAT_HAF <<
445 ID_AA64MMFR1_EL1.HAFDBS, but (V)TCR_ <<
446 as required by the architecture. The <<
447 implementation suffers from an addit <<
448 A/D updates can occur after a PTE ha <<
449 30
450 The workaround forces KVM to explici !! 31 config GENERIC_ISA_DMA
451 which avoids enabling unadvertised h <<
452 at stage-2. <<
453 <<
454 If unsure, say Y. <<
455 <<
456 config ARM64_WORKAROUND_CLEAN_CACHE <<
457 bool 32 bool
458 <<
459 config ARM64_ERRATUM_826319 <<
460 bool "Cortex-A53: 826319: System might <<
461 default y 33 default y
462 select ARM64_WORKAROUND_CLEAN_CACHE <<
463 help <<
464 This option adds an alternative code <<
465 erratum 826319 on Cortex-A53 parts u <<
466 AXI master interface and an L2 cache <<
467 34
468 If a Cortex-A53 uses an AMBA AXI4 AC !! 35 source "init/Kconfig"
469 and is unable to accept a certain wr <<
470 not progress on read data presented <<
471 system can deadlock. <<
472 36
473 The workaround promotes data cache c <<
474 data cache clean-and-invalidate. <<
475 Please note that this does not neces <<
476 as it depends on the alternative fra <<
477 the kernel if an affected CPU is det <<
478 37
479 If unsure, say Y. !! 38 menu "System setup"
480 39
481 config ARM64_ERRATUM_827319 !! 40 choice
482 bool "Cortex-A53: 827319: Data cache c !! 41 prompt "Alpha system type"
483 default y !! 42 default ALPHA_GENERIC
484 select ARM64_WORKAROUND_CLEAN_CACHE !! 43 ---help---
485 help !! 44 This is the system type of your hardware. A "generic" kernel will
486 This option adds an alternative code !! 45 run on any supported Alpha system. However, if you configure a
487 erratum 827319 on Cortex-A53 parts u !! 46 kernel for your specific system, it will be faster and smaller.
488 master interface and an L2 cache. <<
489 47
490 Under certain conditions this erratu !! 48 To find out what type of Alpha system you have, you may want to
491 to occur at the same time as another !! 49 check out the Linux/Alpha FAQ, accessible on the WWW from
492 on the AMBA 5 CHI interface, which c !! 50 <http://www.alphalinux.org/>. In summary:
493 interconnect reorders the two transa <<
494 51
495 The workaround promotes data cache c !! 52 Alcor/Alpha-XLT AS 600
496 data cache clean-and-invalidate. !! 53 Alpha-XL XL-233, XL-266
497 Please note that this does not neces !! 54 AlphaBook1 Alpha laptop
498 as it depends on the alternative fra !! 55 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
499 the kernel if an affected CPU is det !! 56 Cabriolet AlphaPC64, AlphaPCI64
>> 57 DP264 DP264
>> 58 EB164 EB164 21164 evaluation board
>> 59 EB64+ EB64+ 21064 evaluation board
>> 60 EB66 EB66 21066 evaluation board
>> 61 EB66+ EB66+ 21066 evaluation board
>> 62 Jensen DECpc 150, DEC 2000 model 300,
>> 63 DEC 2000 model 500
>> 64 LX164 AlphaPC164-LX
>> 65 Lynx AS 2100A
>> 66 Miata Personal Workstation 433a, 433au, 500a,
>> 67 500au, 600a, or 600au
>> 68 Marvel AlphaServer ES47 / ES80 / GS1280
>> 69 Mikasa AS 1000
>> 70 Noname AXPpci33, UDB (Multia)
>> 71 Noritake AS 1000A, AS 600A, AS 800
>> 72 PC164 AlphaPC164
>> 73 Rawhide AS 1200, AS 4000, AS 4100
>> 74 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
>> 75 SX164 AlphaPC164-SX
>> 76 Sable AS 2000, AS 2100
>> 77 Shark DS 20L
>> 78 Takara Takara
>> 79 Titan AlphaServer ES45 / DS25
>> 80 Wildfire AlphaServer GS 40/80/160/320
500 81
501 If unsure, say Y. !! 82 If you don't know what to do, choose "generic".
502 83
503 config ARM64_ERRATUM_824069 !! 84 config ALPHA_GENERIC
504 bool "Cortex-A53: 824069: Cache line m !! 85 bool "Generic"
505 default y <<
506 select ARM64_WORKAROUND_CLEAN_CACHE <<
507 help 86 help
508 This option adds an alternative code !! 87 A generic kernel will run on all supported Alpha hardware.
509 erratum 824069 on Cortex-A53 parts u <<
510 to a coherent interconnect. <<
511 <<
512 If a Cortex-A53 processor is executi <<
513 write instruction at the same time a <<
514 cluster is executing a cache mainten <<
515 address, then this erratum might cau <<
516 incorrectly marked as dirty. <<
517 <<
518 The workaround promotes data cache c <<
519 data cache clean-and-invalidate. <<
520 Please note that this option does no <<
521 workaround, as it depends on the alt <<
522 only patch the kernel if an affected <<
523 <<
524 If unsure, say Y. <<
525 88
526 config ARM64_ERRATUM_819472 !! 89 config ALPHA_ALCOR
527 bool "Cortex-A53: 819472: Store exclus !! 90 bool "Alcor/Alpha-XLT"
528 default y <<
529 select ARM64_WORKAROUND_CLEAN_CACHE <<
530 help 91 help
531 This option adds an alternative code !! 92 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
532 erratum 819472 on Cortex-A53 parts u !! 93 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
533 present when it is connected to a co !! 94 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
534 !! 95 controller (256-bit memory bus) and a PCI interface. It also does
535 If the processor is executing a load !! 96 all the work required to support an external Bcache and to maintain
536 the same time as a processor in anot !! 97 memory coherence when a PCI device DMAs into (or out of) memory.
537 maintenance operation to the same ad <<
538 cause data corruption. <<
539 <<
540 The workaround promotes data cache c <<
541 data cache clean-and-invalidate. <<
542 Please note that this does not neces <<
543 as it depends on the alternative fra <<
544 the kernel if an affected CPU is det <<
545 <<
546 If unsure, say Y. <<
547 98
548 config ARM64_ERRATUM_832075 !! 99 config ALPHA_XL
549 bool "Cortex-A57: 832075: possible dea !! 100 bool "Alpha-XL"
550 default y <<
551 help 101 help
552 This option adds an alternative code !! 102 XL-233 and XL-266-based Alpha systems.
553 erratum 832075 on Cortex-A57 parts u <<
554 <<
555 Affected Cortex-A57 parts might dead <<
556 instructions to Write-Back memory ar <<
557 <<
558 The workaround is to promote device <<
559 semantics. <<
560 Please note that this does not neces <<
561 as it depends on the alternative fra <<
562 the kernel if an affected CPU is det <<
563 <<
564 If unsure, say Y. <<
565 103
566 config ARM64_ERRATUM_834220 !! 104 config ALPHA_BOOK1
567 bool "Cortex-A57: 834220: Stage 2 tran !! 105 bool "AlphaBook1"
568 depends on KVM <<
569 help 106 help
570 This option adds an alternative code !! 107 Dec AlphaBook1/Burns Alpha-based laptops.
571 erratum 834220 on Cortex-A57 parts u <<
572 108
573 Affected Cortex-A57 parts might repo !! 109 config ALPHA_AVANTI_CH
574 fault as the result of a Stage 1 fau !! 110 bool "Avanti"
575 page boundary when there is a permis <<
576 alignment fault at Stage 1 and a tra <<
577 111
578 The workaround is to verify that the !! 112 config ALPHA_CABRIOLET
579 doesn't generate a fault before hand !! 113 bool "Cabriolet"
580 Please note that this does not neces <<
581 as it depends on the alternative fra <<
582 the kernel if an affected CPU is det <<
583 <<
584 If unsure, say N. <<
585 <<
586 config ARM64_ERRATUM_1742098 <<
587 bool "Cortex-A57/A72: 1742098: ELR rec <<
588 depends on COMPAT <<
589 default y <<
590 help 114 help
591 This option removes the AES hwcap fo !! 115 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
592 workaround erratum 1742098 on Cortex !! 116 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
>> 117 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
>> 118 Bcache SIMMs. Requires power supply with 3.3V output.
593 119
594 Affected parts may corrupt the AES s !! 120 config ALPHA_DP264
595 taken between a pair of AES instruct !! 121 bool "DP264"
596 are only present if the cryptography <<
597 All software should have a fallback <<
598 that don't implement the cryptograph <<
599 <<
600 If unsure, say Y. <<
601 <<
602 config ARM64_ERRATUM_845719 <<
603 bool "Cortex-A53: 845719: a load might <<
604 depends on COMPAT <<
605 default y <<
606 help 122 help
607 This option adds an alternative code !! 123 Various 21264 systems with the tsunami core logic chipset.
608 erratum 845719 on Cortex-A53 parts u !! 124 API Networks: 264DP, UP2000(+), CS20;
>> 125 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
609 126
610 When running a compat (AArch32) user !! 127 config ALPHA_EB164
611 part, a load at EL0 from a virtual a !! 128 bool "EB164"
612 bits of the virtual address used by <<
613 might return incorrect data. <<
614 <<
615 The workaround is to write the conte <<
616 return to a 32-bit task. <<
617 Please note that this does not neces <<
618 as it depends on the alternative fra <<
619 the kernel if an affected CPU is det <<
620 <<
621 If unsure, say Y. <<
622 <<
623 config ARM64_ERRATUM_843419 <<
624 bool "Cortex-A53: 843419: A load or st <<
625 default y <<
626 help 129 help
627 This option links the kernel with '- !! 130 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
628 enables PLT support to replace certa !! 131 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
629 cause subsequent memory accesses to !! 132 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
630 Cortex-A53 parts up to r0p4. !! 133 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
>> 134 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
>> 135 motherboard. Requires power supply with 3.3V output.
631 136
632 If unsure, say Y. !! 137 config ALPHA_EB64P_CH
>> 138 bool "EB64+"
633 139
634 config ARM64_LD_HAS_FIX_ERRATUM_843419 !! 140 config ALPHA_EB66
635 def_bool $(ld-option,--fix-cortex-a53- !! 141 bool "EB66"
636 <<
637 config ARM64_ERRATUM_1024718 <<
638 bool "Cortex-A55: 1024718: Update of D <<
639 default y <<
640 help 142 help
641 This option adds a workaround for AR !! 143 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
642 !! 144 identical to EB64+. Baby PC-AT size. Runs from standard PC power
643 Affected Cortex-A55 cores (all revis !! 145 supply. The EB66 schematic was published as a marketing poster
644 update of the hardware dirty bit whe !! 146 advertising the 21066 as "the first microprocessor in the world with
645 without a break-before-make. The wor !! 147 embedded PCI".
646 of hardware DBM locally on the affec <<
647 this erratum will continue to use th <<
648 <<
649 If unsure, say Y. <<
650 148
651 config ARM64_ERRATUM_1418040 !! 149 config ALPHA_EB66P
652 bool "Cortex-A76/Neoverse-N1: MRC read !! 150 bool "EB66+"
653 default y <<
654 depends on COMPAT <<
655 help 151 help
656 This option adds a workaround for AR !! 152 Later variant of the EB66 board.
657 errata 1188873 and 1418040. <<
658 <<
659 Affected Cortex-A76/Neoverse-N1 core <<
660 cause register corruption when acces <<
661 from AArch32 userspace. <<
662 153
663 If unsure, say Y. !! 154 config ALPHA_EIGER
664 !! 155 bool "Eiger"
665 config ARM64_WORKAROUND_SPECULATIVE_AT <<
666 bool <<
667 <<
668 config ARM64_ERRATUM_1165522 <<
669 bool "Cortex-A76: 1165522: Speculative <<
670 default y <<
671 select ARM64_WORKAROUND_SPECULATIVE_AT <<
672 help 156 help
673 This option adds a workaround for AR !! 157 Apparently an obscure OEM single-board computer based on the
674 !! 158 Typhoon/Tsunami chipset family. Information on it is scanty.
675 Affected Cortex-A76 cores (r0p0, r1p <<
676 corrupted TLBs by speculating an AT <<
677 context switch. <<
678 159
679 If unsure, say Y. !! 160 config ALPHA_JENSEN
680 !! 161 bool "Jensen"
681 config ARM64_ERRATUM_1319367 <<
682 bool "Cortex-A57/A72: 1319537: Specula <<
683 default y <<
684 select ARM64_WORKAROUND_SPECULATIVE_AT <<
685 help 162 help
686 This option adds work arounds for AR !! 163 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
687 and A72 erratum 1319367 !! 164 of the first-generation Alpha systems. A number of these systems
688 !! 165 seem to be available on the second- hand market. The Jensen is a
689 Cortex-A57 and A72 cores could end-u !! 166 floor-standing tower system which originally used a 150MHz 21064 It
690 speculating an AT instruction during !! 167 used programmable logic to interface a 486 EISA I/O bridge to the
691 !! 168 CPU.
692 If unsure, say Y. <<
693 169
694 config ARM64_ERRATUM_1530923 !! 170 config ALPHA_LX164
695 bool "Cortex-A55: 1530923: Speculative !! 171 bool "LX164"
696 default y <<
697 select ARM64_WORKAROUND_SPECULATIVE_AT <<
698 help 172 help
699 This option adds a workaround for AR !! 173 A technical overview of this board is available at
700 !! 174 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
701 Affected Cortex-A55 cores (r0p0, r0p <<
702 corrupted TLBs by speculating an AT <<
703 context switch. <<
704 175
705 If unsure, say Y. !! 176 config ALPHA_LYNX
706 !! 177 bool "Lynx"
707 config ARM64_WORKAROUND_REPEAT_TLBI <<
708 bool <<
709 <<
710 config ARM64_ERRATUM_2441007 <<
711 bool "Cortex-A55: Completion of affect <<
712 select ARM64_WORKAROUND_REPEAT_TLBI <<
713 help 178 help
714 This option adds a workaround for AR !! 179 AlphaServer 2100A-based systems.
715 <<
716 Under very rare circumstances, affec <<
717 may not handle a race between a brea <<
718 CPU, and another CPU accessing the s <<
719 store to a page that has been unmapp <<
720 180
721 Work around this by adding the affec !! 181 config ALPHA_MARVEL
722 TLB sequences to be done twice. !! 182 bool "Marvel"
723 <<
724 If unsure, say N. <<
725 <<
726 config ARM64_ERRATUM_1286807 <<
727 bool "Cortex-A76: Modification of the <<
728 select ARM64_WORKAROUND_REPEAT_TLBI <<
729 help <<
730 This option adds a workaround for AR <<
731 <<
732 On the affected Cortex-A76 cores (r0 <<
733 address for a cacheable mapping of a <<
734 accessed by a core while another cor <<
735 address to a new physical page using <<
736 break-before-make sequence, then und <<
737 TLBI+DSB completes before a read usi <<
738 invalidated has been observed by oth <<
739 workaround repeats the TLBI+DSB oper <<
740 <<
741 If unsure, say N. <<
742 <<
743 config ARM64_ERRATUM_1463225 <<
744 bool "Cortex-A76: Software Step might <<
745 default y <<
746 help 183 help
747 This option adds a workaround for Ar !! 184 AlphaServer ES47 / ES80 / GS1280 based on EV7.
748 <<
749 On the affected Cortex-A76 cores (r0 <<
750 of a system call instruction (SVC) c <<
751 subsequent interrupts when software <<
752 exception handler of the system call <<
753 is enabled or VHE is in use. <<
754 <<
755 Work around the erratum by triggerin <<
756 when handling a system call from a t <<
757 in a VHE configuration of the kernel <<
758 185
759 If unsure, say Y. !! 186 config ALPHA_MIATA
760 !! 187 bool "Miata"
761 config ARM64_ERRATUM_1542419 <<
762 bool "Neoverse-N1: workaround mis-orde <<
763 help 188 help
764 This option adds a workaround for AR !! 189 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
765 1542419. !! 190 or 600au). There is an Installation HOWTO for this hardware at
766 !! 191 <http://members.brabant.chello.nl/~s.vandereijk/miata.html>.
767 Affected Neoverse-N1 cores could exe <<
768 modified by another CPU. The workaro <<
769 counterpart. <<
770 <<
771 Workaround the issue by hiding the D <<
772 forces user-space to perform cache m <<
773 192
774 If unsure, say N. !! 193 config ALPHA_MIKASA
775 !! 194 bool "Mikasa"
776 config ARM64_ERRATUM_1508412 <<
777 bool "Cortex-A77: 1508412: workaround <<
778 default y <<
779 help 195 help
780 This option adds a workaround for Ar !! 196 AlphaServer 1000-based Alpha systems.
781 <<
782 Affected Cortex-A77 cores (r0p0, r1p <<
783 of a store-exclusive or read of PAR_ <<
784 non-cacheable memory attributes. The <<
785 counterpart. <<
786 <<
787 KVM guests must also have the workar <<
788 deadlock the system. <<
789 <<
790 Work around the issue by inserting D <<
791 register reads and warning KVM users <<
792 to prevent a speculative PAR_EL1 rea <<
793 <<
794 If unsure, say Y. <<
795 197
796 config ARM64_WORKAROUND_TRBE_OVERWRITE_FILL_MO !! 198 config ALPHA_NAUTILUS
797 bool !! 199 bool "Nautilus"
798 <<
799 config ARM64_ERRATUM_2051678 <<
800 bool "Cortex-A510: 2051678: disable Ha <<
801 default y <<
802 help 200 help
803 This options adds the workaround for !! 201 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
804 Affected Cortex-A510 might not respe <<
805 hardware update of the page table's <<
806 is to not enable the feature on affe <<
807 202
808 If unsure, say Y. !! 203 config ALPHA_NONAME_CH
>> 204 bool "Noname"
809 205
810 config ARM64_ERRATUM_2077057 !! 206 config ALPHA_NORITAKE
811 bool "Cortex-A510: 2077057: workaround !! 207 bool "Noritake"
812 default y <<
813 help 208 help
814 This option adds the workaround for !! 209 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
815 Affected Cortex-A510 may corrupt SPS !! 210 systems.
816 expected, but a Pointer Authenticati <<
817 erratum causes SPSR_EL1 to be copied <<
818 EL1 to cause a return to EL2 with a <<
819 <<
820 This can only happen when EL2 is ste <<
821 <<
822 When these conditions occur, the SPS <<
823 previous guest entry, and can be res <<
824 <<
825 If unsure, say Y. <<
826 <<
827 config ARM64_ERRATUM_2658417 <<
828 bool "Cortex-A510: 2658417: remove BF1 <<
829 default y <<
830 help <<
831 This option adds the workaround for <<
832 Affected Cortex-A510 (r0p0 to r1p1) <<
833 BFMMLA or VMMLA instructions in rare <<
834 A510 CPUs are using shared neon hard <<
835 discoverable by the kernel, hide the <<
836 user-space should not be using these <<
837 <<
838 If unsure, say Y. <<
839 <<
840 config ARM64_ERRATUM_2119858 <<
841 bool "Cortex-A710/X2: 2119858: workaro <<
842 default y <<
843 depends on CORESIGHT_TRBE <<
844 select ARM64_WORKAROUND_TRBE_OVERWRITE <<
845 help <<
846 This option adds the workaround for <<
847 <<
848 Affected Cortex-A710/X2 cores could <<
849 data at the base of the buffer (poin <<
850 the event of a WRAP event. <<
851 211
852 Work around the issue by always maki !! 212 config ALPHA_PC164
853 256 bytes before enabling the buffer !! 213 bool "PC164"
854 the buffer with ETM ignore packets u <<
855 214
856 If unsure, say Y. !! 215 config ALPHA_P2K
>> 216 bool "Platform2000"
857 217
858 config ARM64_ERRATUM_2139208 !! 218 config ALPHA_RAWHIDE
859 bool "Neoverse-N2: 2139208: workaround !! 219 bool "Rawhide"
860 default y <<
861 depends on CORESIGHT_TRBE <<
862 select ARM64_WORKAROUND_TRBE_OVERWRITE <<
863 help 220 help
864 This option adds the workaround for !! 221 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
865 !! 222 See HOWTO at
866 Affected Neoverse-N2 cores could ove !! 223 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
867 data at the base of the buffer (poin <<
868 the event of a WRAP event. <<
869 <<
870 Work around the issue by always maki <<
871 256 bytes before enabling the buffer <<
872 the buffer with ETM ignore packets u <<
873 <<
874 If unsure, say Y. <<
875 224
876 config ARM64_WORKAROUND_TSB_FLUSH_FAILURE !! 225 config ALPHA_RUFFIAN
877 bool !! 226 bool "Ruffian"
878 <<
879 config ARM64_ERRATUM_2054223 <<
880 bool "Cortex-A710: 2054223: workaround <<
881 default y <<
882 select ARM64_WORKAROUND_TSB_FLUSH_FAIL <<
883 help 227 help
884 Enable workaround for ARM Cortex-A71 !! 228 Samsung APC164UX. There is a page on known problems and workarounds
885 !! 229 at <http://www.alphalinux.org/faq/FAQ-11.html>.
886 Affected cores may fail to flush the <<
887 the PE is in trace prohibited state. <<
888 of the trace cached. <<
889 230
890 Workaround is to issue two TSB conse !! 231 config ALPHA_RX164
>> 232 bool "RX164"
891 233
892 If unsure, say Y. !! 234 config ALPHA_SX164
>> 235 bool "SX164"
893 236
894 config ARM64_ERRATUM_2067961 !! 237 config ALPHA_SABLE
895 bool "Neoverse-N2: 2067961: workaround !! 238 bool "Sable"
896 default y <<
897 select ARM64_WORKAROUND_TSB_FLUSH_FAIL <<
898 help 239 help
899 Enable workaround for ARM Neoverse-N !! 240 Digital AlphaServer 2000 and 2100-based systems.
900 <<
901 Affected cores may fail to flush the <<
902 the PE is in trace prohibited state. <<
903 of the trace cached. <<
904 241
905 Workaround is to issue two TSB conse !! 242 config ALPHA_SHARK
>> 243 bool "Shark"
906 244
907 If unsure, say Y. !! 245 config ALPHA_TAKARA
908 !! 246 bool "Takara"
909 config ARM64_WORKAROUND_TRBE_WRITE_OUT_OF_RANG <<
910 bool <<
911 <<
912 config ARM64_ERRATUM_2253138 <<
913 bool "Neoverse-N2: 2253138: workaround <<
914 depends on CORESIGHT_TRBE <<
915 default y <<
916 select ARM64_WORKAROUND_TRBE_WRITE_OUT <<
917 help <<
918 This option adds the workaround for <<
919 <<
920 Affected Neoverse-N2 cores might wri <<
921 for TRBE. Under some conditions, the <<
922 virtually addressed page following t <<
923 (i.e., the TRBLIMITR_EL1.LIMIT), ins <<
924 <<
925 Work around this in the driver by al <<
926 page beyond the TRBLIMITR_EL1.LIMIT, <<
927 <<
928 If unsure, say Y. <<
929 <<
930 config ARM64_ERRATUM_2224489 <<
931 bool "Cortex-A710/X2: 2224489: workaro <<
932 depends on CORESIGHT_TRBE <<
933 default y <<
934 select ARM64_WORKAROUND_TRBE_WRITE_OUT <<
935 help <<
936 This option adds the workaround for <<
937 <<
938 Affected Cortex-A710/X2 cores might <<
939 for TRBE. Under some conditions, the <<
940 virtually addressed page following t <<
941 (i.e., the TRBLIMITR_EL1.LIMIT), ins <<
942 <<
943 Work around this in the driver by al <<
944 page beyond the TRBLIMITR_EL1.LIMIT, <<
945 <<
946 If unsure, say Y. <<
947 <<
948 config ARM64_ERRATUM_2441009 <<
949 bool "Cortex-A510: Completion of affec <<
950 select ARM64_WORKAROUND_REPEAT_TLBI <<
951 help <<
952 This option adds a workaround for AR <<
953 <<
954 Under very rare circumstances, affec <<
955 may not handle a race between a brea <<
956 CPU, and another CPU accessing the s <<
957 store to a page that has been unmapp <<
958 <<
959 Work around this by adding the affec <<
960 TLB sequences to be done twice. <<
961 <<
962 If unsure, say N. <<
963 <<
964 config ARM64_ERRATUM_2064142 <<
965 bool "Cortex-A510: 2064142: workaround <<
966 depends on CORESIGHT_TRBE <<
967 default y <<
968 help <<
969 This option adds the workaround for <<
970 <<
971 Affected Cortex-A510 core might fail <<
972 TRBE has been disabled. Under some c <<
973 writes into TRBE registers TRBLIMITR <<
974 and TRBTRG_EL1 will be ignored and w <<
975 <<
976 Work around this in the driver by ex <<
977 is stopped and before performing a s <<
978 registers. <<
979 <<
980 If unsure, say Y. <<
981 <<
982 config ARM64_ERRATUM_2038923 <<
983 bool "Cortex-A510: 2038923: workaround <<
984 depends on CORESIGHT_TRBE <<
985 default y <<
986 help <<
987 This option adds the workaround for <<
988 <<
989 Affected Cortex-A510 core might caus <<
990 prohibited within the CPU. As a resu <<
991 might be corrupted. This happens aft <<
992 TRBLIMITR_EL1.E, followed by just a <<
993 execution changes from a context, in <<
994 isn't, or vice versa. In these menti <<
995 is prohibited is inconsistent betwee <<
996 the trace buffer state might be corr <<
997 <<
998 Work around this in the driver by pr <<
999 trace is prohibited or not based on <<
1000 change to TRBLIMITR_EL1.E with at l <<
1001 two ISB instructions if no ERET is <<
1002 <<
1003 If unsure, say Y. <<
1004 <<
1005 config ARM64_ERRATUM_1902691 <<
1006 bool "Cortex-A510: 1902691: workaroun <<
1007 depends on CORESIGHT_TRBE <<
1008 default y <<
1009 help 247 help
1010 This option adds the workaround for !! 248 Alpha 11164-based OEM single-board computer.
1011 249
1012 Affected Cortex-A510 core might cau !! 250 config ALPHA_TITAN
1013 into the memory. Effectively TRBE i !! 251 bool "Titan"
1014 trace data. <<
1015 <<
1016 Work around this problem in the dri <<
1017 affected cpus. The firmware must ha <<
1018 on such implementations. This will <<
1019 do this already. <<
1020 <<
1021 If unsure, say Y. <<
1022 <<
1023 config ARM64_ERRATUM_2457168 <<
1024 bool "Cortex-A510: 2457168: workaroun <<
1025 depends on ARM64_AMU_EXTN <<
1026 default y <<
1027 help 252 help
1028 This option adds the workaround for !! 253 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
1029 254
1030 The AMU counter AMEVCNTR01 (constan !! 255 config ALPHA_WILDFIRE
1031 as the system counter. On affected !! 256 bool "Wildfire"
1032 incorrectly giving a significantly <<
1033 <<
1034 Work around this problem by returni <<
1035 key locations that results in disab <<
1036 is the same to firmware disabling a <<
1037 <<
1038 If unsure, say Y. <<
1039 <<
1040 config ARM64_ERRATUM_2645198 <<
1041 bool "Cortex-A715: 2645198: Workaroun <<
1042 default y <<
1043 help 257 help
1044 This option adds the workaround for !! 258 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
1045 259
1046 If a Cortex-A715 cpu sees a page ma !! 260 endchoice
1047 to non-executable, it may corrupt t <<
1048 next instruction abort caused by pe <<
1049 <<
1050 Only user-space does executable to <<
1051 mprotect() system call. Workaround <<
1052 TLB invalidation, for all changes t <<
1053 <<
1054 If unsure, say Y. <<
1055 261
1056 config ARM64_WORKAROUND_SPECULATIVE_UNPRIV_LO !! 262 # clear all implied options (don't want default values for those):
>> 263 # Most of these machines have ISA slots; not exactly sure which don't,
>> 264 # and this doesn't activate hordes of code, so do it always.
>> 265 config ISA
1057 bool 266 bool
1058 <<
1059 config ARM64_ERRATUM_2966298 <<
1060 bool "Cortex-A520: 2966298: workaroun <<
1061 select ARM64_WORKAROUND_SPECULATIVE_U <<
1062 default y <<
1063 help <<
1064 This option adds the workaround for <<
1065 <<
1066 On an affected Cortex-A520 core, a <<
1067 load might leak data from a privile <<
1068 <<
1069 Work around this problem by executi <<
1070 <<
1071 If unsure, say Y. <<
1072 <<
1073 config ARM64_ERRATUM_3117295 <<
1074 bool "Cortex-A510: 3117295: workaroun <<
1075 select ARM64_WORKAROUND_SPECULATIVE_U <<
1076 default y 267 default y
1077 help 268 help
1078 This option adds the workaround for !! 269 Find out whether you have ISA slots on your motherboard. ISA is the
1079 !! 270 name of a bus system, i.e. the way the CPU talks to the other stuff
1080 On an affected Cortex-A510 core, a !! 271 inside your box. Other bus systems are PCI, EISA, MicroChannel
1081 load might leak data from a privile !! 272 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 273 newer boards don't support it. If you have ISA, say Y, otherwise N.
1082 274
1083 Work around this problem by executi !! 275 config PCI
1084 !! 276 bool
1085 If unsure, say Y. !! 277 depends on !ALPHA_JENSEN
1086 <<
1087 config ARM64_ERRATUM_3194386 <<
1088 bool "Cortex-*/Neoverse-*: workaround <<
1089 default y <<
1090 help <<
1091 This option adds the workaround for <<
1092 <<
1093 * ARM Cortex-A76 erratum 3324349 <<
1094 * ARM Cortex-A77 erratum 3324348 <<
1095 * ARM Cortex-A78 erratum 3324344 <<
1096 * ARM Cortex-A78C erratum 3324346 <<
1097 * ARM Cortex-A78C erratum 3324347 <<
1098 * ARM Cortex-A710 erratam 3324338 <<
1099 * ARM Cortex-A715 errartum 3456084 <<
1100 * ARM Cortex-A720 erratum 3456091 <<
1101 * ARM Cortex-A725 erratum 3456106 <<
1102 * ARM Cortex-X1 erratum 3324344 <<
1103 * ARM Cortex-X1C erratum 3324346 <<
1104 * ARM Cortex-X2 erratum 3324338 <<
1105 * ARM Cortex-X3 erratum 3324335 <<
1106 * ARM Cortex-X4 erratum 3194386 <<
1107 * ARM Cortex-X925 erratum 3324334 <<
1108 * ARM Neoverse-N1 erratum 3324349 <<
1109 * ARM Neoverse N2 erratum 3324339 <<
1110 * ARM Neoverse-N3 erratum 3456111 <<
1111 * ARM Neoverse-V1 erratum 3324341 <<
1112 * ARM Neoverse V2 erratum 3324336 <<
1113 * ARM Neoverse-V3 erratum 3312417 <<
1114 <<
1115 On affected cores "MSR SSBS, #0" in <<
1116 subsequent speculative instructions <<
1117 speculative store bypassing. <<
1118 <<
1119 Work around this problem by placing <<
1120 Instruction Synchronization Barrier <<
1121 SSBS. The presence of the SSBS spec <<
1122 from hwcaps and EL0 reads of ID_AA6 <<
1123 will use the PR_SPEC_STORE_BYPASS p <<
1124 <<
1125 If unsure, say Y. <<
1126 <<
1127 config CAVIUM_ERRATUM_22375 <<
1128 bool "Cavium erratum 22375, 24313" <<
1129 default y <<
1130 help <<
1131 Enable workaround for errata 22375 <<
1132 <<
1133 This implements two gicv3-its errat <<
1134 with a small impact affecting only <<
1135 <<
1136 erratum 22375: only alloc 8MB tab <<
1137 erratum 24313: ignore memory acce <<
1138 <<
1139 The fixes are in ITS initialization <<
1140 type and table size provided by the <<
1141 <<
1142 If unsure, say Y. <<
1143 <<
1144 config CAVIUM_ERRATUM_23144 <<
1145 bool "Cavium erratum 23144: ITS SYNC <<
1146 depends on NUMA <<
1147 default y 278 default y
1148 help 279 help
1149 ITS SYNC command hang for cross nod !! 280 Find out whether you have a PCI motherboard. PCI is the name of a
>> 281 bus system, i.e. the way the CPU talks to the other stuff inside
>> 282 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
>> 283 VESA. If you have PCI, say Y, otherwise N.
1150 284
1151 If unsure, say Y. !! 285 The PCI-HOWTO, available from
>> 286 <http://www.tldp.org/docs.html#howto>, contains valuable
>> 287 information about which PCI hardware does work under Linux and which
>> 288 doesn't.
1152 289
1153 config CAVIUM_ERRATUM_23154 !! 290 config PCI_DOMAINS
1154 bool "Cavium errata 23154 and 38545: !! 291 bool
1155 default y 292 default y
1156 help <<
1157 The ThunderX GICv3 implementation r <<
1158 reading the IAR status to ensure da <<
1159 (access to icc_iar1_el1 is not sync <<
1160 293
1161 It also suffers from erratum 38545 !! 294 config ALPHA_CORE_AGP
1162 OcteonTX and OcteonTX2), resulting !! 295 bool
1163 spuriously presented to the CPU int !! 296 depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL
1164 <<
1165 If unsure, say Y. <<
1166 <<
1167 config CAVIUM_ERRATUM_27456 <<
1168 bool "Cavium erratum 27456: Broadcast <<
1169 default y 297 default y
1170 help <<
1171 On ThunderX T88 pass 1.x through 2. <<
1172 instructions may cause the icache t <<
1173 contains data for a non-current ASI <<
1174 invalidate the icache when changing <<
1175 298
1176 If unsure, say Y. !! 299 config ALPHA_NONAME
1177 !! 300 bool
1178 config CAVIUM_ERRATUM_30115 !! 301 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
1179 bool "Cavium erratum 30115: Guest may <<
1180 default y 302 default y
1181 help 303 help
1182 On ThunderX T88 pass 1.x through 2. !! 304 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
1183 1.2, and T83 Pass 1.0, KVM guest ex !! 305 UDB). This design was produced by Digital's Technical OEM (TOEM)
1184 interrupts in host. Trapping both G !! 306 group. It uses the 21066 processor running at 166MHz or 233MHz. It
1185 accesses sidesteps the issue. !! 307 is a baby-AT size, and runs from a standard PC power supply. It has
>> 308 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
>> 309 2 versions, with either PS/2 or large DIN connectors for the
>> 310 keyboard.
1186 311
1187 If unsure, say Y. !! 312 config ALPHA_EV4
>> 313 bool
>> 314 depends on ALPHA_JENSEN || (ALPHA_SABLE && !ALPHA_GAMMA) || ALPHA_LYNX || ALPHA_NORITAKE && !ALPHA_PRIMO || ALPHA_MIKASA && !ALPHA_PRIMO || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL || ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
>> 315 default y if !ALPHA_LYNX
1188 316
1189 config CAVIUM_TX2_ERRATUM_219 !! 317 config ALPHA_LCA
1190 bool "Cavium ThunderX2 erratum 219: P !! 318 bool
>> 319 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
1191 default y 320 default y
1192 help <<
1193 On Cavium ThunderX2, a load, store <<
1194 TTBR update and the corresponding c <<
1195 cause a spurious Data Abort to be d <<
1196 the CPU core. <<
1197 <<
1198 Work around the issue by avoiding t <<
1199 trapping KVM guest TTBRx_EL1 writes <<
1200 trap handler performs the correspon <<
1201 instruction and ensures context syn <<
1202 exception return. <<
1203 <<
1204 If unsure, say Y. <<
1205 321
1206 config FUJITSU_ERRATUM_010001 !! 322 config ALPHA_APECS
1207 bool "Fujitsu-A64FX erratum E#010001: !! 323 bool
>> 324 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
1208 default y 325 default y
1209 help <<
1210 This option adds a workaround for F <<
1211 On some variants of the Fujitsu-A64 <<
1212 accesses may cause undefined fault <<
1213 This fault occurs under a specific <<
1214 load/store instruction performs an <<
1215 case-1 TTBR0_EL1 with TCR_EL1.NFD0 <<
1216 case-2 TTBR0_EL2 with TCR_EL2.NFD0 <<
1217 case-3 TTBR1_EL1 with TCR_EL1.NFD1 <<
1218 case-4 TTBR1_EL2 with TCR_EL2.NFD1 <<
1219 <<
1220 The workaround is to ensure these b <<
1221 The workaround only affects the Fuj <<
1222 326
1223 If unsure, say Y. !! 327 config ALPHA_EB64P
1224 !! 328 bool
1225 config HISILICON_ERRATUM_161600802 !! 329 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
1226 bool "Hip07 161600802: Erroneous redi <<
1227 default y 330 default y
1228 help 331 help
1229 The HiSilicon Hip07 SoC uses the wr !! 332 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
1230 when issued ITS commands such as VM !! 333 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
1231 a 128kB offset to be applied to the !! 334 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
>> 335 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
>> 336 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
>> 337 Runs from standard PC power supply.
1232 338
1233 If unsure, say Y. !! 339 config ALPHA_EV5
>> 340 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
>> 341 default y if ALPHA_RX164 || ALPHA_RAWHIDE || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_SABLE && ALPHA_GAMMA || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
1234 342
1235 config QCOM_FALKOR_ERRATUM_1003 !! 343 config ALPHA_EV4
1236 bool "Falkor E1003: Incorrect transla !! 344 bool
1237 default y !! 345 default y if ALPHA_LYNX && !ALPHA_EV5
1238 help <<
1239 On Falkor v1, an incorrect ASID may <<
1240 and BADDR are changed together in T <<
1241 in TTBR1_EL1, this situation only o <<
1242 then only for entries in the walk c <<
1243 is unchanged. Work around the errat <<
1244 entries for the trampoline before e <<
1245 346
1246 config QCOM_FALKOR_ERRATUM_1009 !! 347 config ALPHA_CIA
1247 bool "Falkor E1009: Prematurely compl !! 348 bool
>> 349 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
1248 default y 350 default y
1249 select ARM64_WORKAROUND_REPEAT_TLBI <<
1250 help <<
1251 On Falkor v1, the CPU may premature <<
1252 TLBI xxIS invalidate maintenance op <<
1253 one more time to fix the issue. <<
1254 351
1255 If unsure, say Y. !! 352 config ALPHA_EV56
>> 353 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
>> 354 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
1256 355
1257 config QCOM_QDF2400_ERRATUM_0065 !! 356 config ALPHA_EV56
1258 bool "QDF2400 E0065: Incorrect GITS_T !! 357 prompt "EV56 CPU (speed >= 333MHz)?"
1259 default y !! 358 depends on ALPHA_NORITAKE && ALPHA_PRIMO
1260 help <<
1261 On Qualcomm Datacenter Technologies <<
1262 ITE size incorrectly. The GITS_TYPE <<
1263 been indicated as 16Bytes (0xf), no <<
1264 359
1265 If unsure, say Y. !! 360 config ALPHA_EV56
>> 361 prompt "EV56 CPU (speed >= 400MHz)?"
>> 362 depends on ALPHA_RAWHIDE
1266 363
1267 config QCOM_FALKOR_ERRATUM_E1041 !! 364 config ALPHA_PRIMO
1268 bool "Falkor E1041: Speculative instr !! 365 bool "EV5 CPU daughtercard (model 5/xxx)?"
1269 default y !! 366 depends on ALPHA_NORITAKE || ALPHA_MIKASA
1270 help 367 help
1271 Falkor CPU may speculatively fetch !! 368 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
1272 memory location when MMU translatio <<
1273 to SCTLR_ELn[M]=0. Prefix an ISB in <<
1274 <<
1275 If unsure, say Y. <<
1276 369
1277 config NVIDIA_CARMEL_CNP_ERRATUM !! 370 config ALPHA_GAMMA
1278 bool "NVIDIA Carmel CNP: CNP on Carme !! 371 bool "EV5 CPU(s) (model 5/xxx)?"
1279 default y !! 372 depends on ALPHA_SABLE
1280 help 373 help
1281 If CNP is enabled on Carmel cores, !! 374 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
1282 invalidate shared TLB entries insta <<
1283 on standard ARM cores. <<
1284 <<
1285 If unsure, say Y. <<
1286 375
1287 config ROCKCHIP_ERRATUM_3588001 !! 376 config ALPHA_GAMMA
1288 bool "Rockchip 3588001: GIC600 can no !! 377 bool
>> 378 depends on ALPHA_LYNX
1289 default y 379 default y
1290 help <<
1291 The Rockchip RK3588 GIC600 SoC inte <<
1292 This means, that its sharability fe <<
1293 is supported by the IP itself. <<
1294 380
1295 If unsure, say Y. !! 381 config ALPHA_T2
1296 !! 382 bool
1297 config SOCIONEXT_SYNQUACER_PREITS !! 383 depends on ALPHA_SABLE || ALPHA_LYNX
1298 bool "Socionext Synquacer: Workaround <<
1299 default y 384 default y
1300 help <<
1301 Socionext Synquacer SoCs implement <<
1302 MSI doorbell writes with non-zero v <<
1303 <<
1304 If unsure, say Y. <<
1305 <<
1306 endmenu # "ARM errata workarounds via the alt <<
1307 <<
1308 choice <<
1309 prompt "Page size" <<
1310 default ARM64_4K_PAGES <<
1311 help <<
1312 Page size (translation granule) con <<
1313 <<
1314 config ARM64_4K_PAGES <<
1315 bool "4KB" <<
1316 select HAVE_PAGE_SIZE_4KB <<
1317 help <<
1318 This feature enables 4KB pages supp <<
1319 <<
1320 config ARM64_16K_PAGES <<
1321 bool "16KB" <<
1322 select HAVE_PAGE_SIZE_16KB <<
1323 help <<
1324 The system will use 16KB pages supp <<
1325 requires applications compiled with <<
1326 aligned segments. <<
1327 <<
1328 config ARM64_64K_PAGES <<
1329 bool "64KB" <<
1330 select HAVE_PAGE_SIZE_64KB <<
1331 help <<
1332 This feature enables 64KB pages sup <<
1333 allowing only two levels of page ta <<
1334 look-up. AArch32 emulation requires <<
1335 with 64K aligned segments. <<
1336 <<
1337 endchoice <<
1338 <<
1339 choice <<
1340 prompt "Virtual address space size" <<
1341 default ARM64_VA_BITS_52 <<
1342 help <<
1343 Allows choosing one of multiple pos <<
1344 space sizes. The level of translati <<
1345 a combination of page size and virt <<
1346 <<
1347 config ARM64_VA_BITS_36 <<
1348 bool "36-bit" if EXPERT <<
1349 depends on PAGE_SIZE_16KB <<
1350 <<
1351 config ARM64_VA_BITS_39 <<
1352 bool "39-bit" <<
1353 depends on PAGE_SIZE_4KB <<
1354 <<
1355 config ARM64_VA_BITS_42 <<
1356 bool "42-bit" <<
1357 depends on PAGE_SIZE_64KB <<
1358 <<
1359 config ARM64_VA_BITS_47 <<
1360 bool "47-bit" <<
1361 depends on PAGE_SIZE_16KB <<
1362 <<
1363 config ARM64_VA_BITS_48 <<
1364 bool "48-bit" <<
1365 <<
1366 config ARM64_VA_BITS_52 <<
1367 bool "52-bit" <<
1368 depends on ARM64_PAN || !ARM64_SW_TTB <<
1369 help <<
1370 Enable 52-bit virtual addressing fo <<
1371 requested via a hint to mmap(). The <<
1372 virtual addresses for its own mappi <<
1373 this feature is available, otherwis <<
1374 <<
1375 NOTE: Enabling 52-bit virtual addre <<
1376 ARMv8.3 Pointer Authentication will <<
1377 reduced from 7 bits to 3 bits, whic <<
1378 impact on its susceptibility to bru <<
1379 <<
1380 If unsure, select 48-bit virtual ad <<
1381 <<
1382 endchoice <<
1383 <<
1384 config ARM64_FORCE_52BIT <<
1385 bool "Force 52-bit virtual addresses <<
1386 depends on ARM64_VA_BITS_52 && EXPERT <<
1387 help <<
1388 For systems with 52-bit userspace V <<
1389 to maintain compatibility with olde <<
1390 unless a hint is supplied to mmap. <<
1391 <<
1392 This configuration option disables <<
1393 forces all userspace addresses to b <<
1394 should only enable this configurati <<
1395 memory management code. If unsure s <<
1396 <<
1397 config ARM64_VA_BITS <<
1398 int <<
1399 default 36 if ARM64_VA_BITS_36 <<
1400 default 39 if ARM64_VA_BITS_39 <<
1401 default 42 if ARM64_VA_BITS_42 <<
1402 default 47 if ARM64_VA_BITS_47 <<
1403 default 48 if ARM64_VA_BITS_48 <<
1404 default 52 if ARM64_VA_BITS_52 <<
1405 <<
1406 choice <<
1407 prompt "Physical address space size" <<
1408 default ARM64_PA_BITS_48 <<
1409 help <<
1410 Choose the maximum physical address <<
1411 support. <<
1412 <<
1413 config ARM64_PA_BITS_48 <<
1414 bool "48-bit" <<
1415 depends on ARM64_64K_PAGES || !ARM64_ <<
1416 <<
1417 config ARM64_PA_BITS_52 <<
1418 bool "52-bit" <<
1419 depends on ARM64_64K_PAGES || ARM64_V <<
1420 depends on ARM64_PAN || !ARM64_SW_TTB <<
1421 help <<
1422 Enable support for a 52-bit physica <<
1423 part of the ARMv8.2-LPA extension. <<
1424 <<
1425 With this enabled, the kernel will <<
1426 do not support ARMv8.2-LPA, but wit <<
1427 minor performance overhead). <<
1428 <<
1429 endchoice <<
1430 <<
1431 config ARM64_PA_BITS <<
1432 int <<
1433 default 48 if ARM64_PA_BITS_48 <<
1434 default 52 if ARM64_PA_BITS_52 <<
1435 <<
1436 config ARM64_LPA2 <<
1437 def_bool y <<
1438 depends on ARM64_PA_BITS_52 && !ARM64 <<
1439 <<
1440 choice <<
1441 prompt "Endianness" <<
1442 default CPU_LITTLE_ENDIAN <<
1443 help <<
1444 Select the endianness of data acces <<
1445 applications will need to be compil <<
1446 that is selected here. <<
1447 <<
1448 config CPU_BIG_ENDIAN <<
1449 bool "Build big-endian kernel" <<
1450 # https://github.com/llvm/llvm-projec <<
1451 depends on AS_IS_GNU || AS_VERSION >= <<
1452 help <<
1453 Say Y if you plan on running a kern <<
1454 <<
1455 config CPU_LITTLE_ENDIAN <<
1456 bool "Build little-endian kernel" <<
1457 help <<
1458 Say Y if you plan on running a kern <<
1459 This is usually the case for distri <<
1460 <<
1461 endchoice <<
1462 <<
1463 config SCHED_MC <<
1464 bool "Multi-core scheduler support" <<
1465 help <<
1466 Multi-core scheduler support improv <<
1467 making when dealing with multi-core <<
1468 increased overhead in some places. <<
1469 <<
1470 config SCHED_CLUSTER <<
1471 bool "Cluster scheduler support" <<
1472 help <<
1473 Cluster scheduler support improves <<
1474 making when dealing with machines t <<
1475 Cluster usually means a couple of C <<
1476 by sharing mid-level caches, last-l <<
1477 busses. <<
1478 <<
1479 config SCHED_SMT <<
1480 bool "SMT scheduler support" <<
1481 help <<
1482 Improves the CPU scheduler's decisi <<
1483 MultiThreading at a cost of slightl <<
1484 places. If unsure say N here. <<
1485 <<
1486 config NR_CPUS <<
1487 int "Maximum number of CPUs (2-4096)" <<
1488 range 2 4096 <<
1489 default "512" <<
1490 <<
1491 config HOTPLUG_CPU <<
1492 bool "Support for hot-pluggable CPUs" <<
1493 select GENERIC_IRQ_MIGRATION <<
1494 help <<
1495 Say Y here to experiment with turni <<
1496 can be controlled through /sys/devi <<
1497 <<
1498 # Common NUMA Features <<
1499 config NUMA <<
1500 bool "NUMA Memory Allocation and Sche <<
1501 select GENERIC_ARCH_NUMA <<
1502 select OF_NUMA <<
1503 select HAVE_SETUP_PER_CPU_AREA <<
1504 select NEED_PER_CPU_EMBED_FIRST_CHUNK <<
1505 select NEED_PER_CPU_PAGE_FIRST_CHUNK <<
1506 select USE_PERCPU_NUMA_NODE_ID <<
1507 help <<
1508 Enable NUMA (Non-Uniform Memory Acc <<
1509 <<
1510 The kernel will try to allocate mem <<
1511 local memory of the CPU and add som <<
1512 NUMA awareness to the kernel. <<
1513 <<
1514 config NODES_SHIFT <<
1515 int "Maximum NUMA Nodes (as a power o <<
1516 range 1 10 <<
1517 default "4" <<
1518 depends on NUMA <<
1519 help <<
1520 Specify the maximum number of NUMA <<
1521 system. Increases memory reserved <<
1522 <<
1523 source "kernel/Kconfig.hz" <<
1524 <<
1525 config ARCH_SPARSEMEM_ENABLE <<
1526 def_bool y <<
1527 select SPARSEMEM_VMEMMAP_ENABLE <<
1528 select SPARSEMEM_VMEMMAP <<
1529 385
1530 config HW_PERF_EVENTS !! 386 config ALPHA_PYXIS
1531 def_bool y !! 387 bool
1532 depends on ARM_PMU !! 388 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
1533 <<
1534 # Supported by clang >= 7.0 or GCC >= 12.0.0 <<
1535 config CC_HAVE_SHADOW_CALL_STACK <<
1536 def_bool $(cc-option, -fsanitize=shad <<
1537 <<
1538 config PARAVIRT <<
1539 bool "Enable paravirtualization code" <<
1540 help <<
1541 This changes the kernel so it can m <<
1542 under a hypervisor, potentially imp <<
1543 over full virtualization. <<
1544 <<
1545 config PARAVIRT_TIME_ACCOUNTING <<
1546 bool "Paravirtual steal time accounti <<
1547 select PARAVIRT <<
1548 help <<
1549 Select this option to enable fine g <<
1550 accounting. Time spent executing ot <<
1551 the current vCPU is discounted from <<
1552 that, there can be a small performa <<
1553 <<
1554 If in doubt, say N here. <<
1555 <<
1556 config ARCH_SUPPORTS_KEXEC <<
1557 def_bool PM_SLEEP_SMP <<
1558 <<
1559 config ARCH_SUPPORTS_KEXEC_FILE <<
1560 def_bool y <<
1561 <<
1562 config ARCH_SELECTS_KEXEC_FILE <<
1563 def_bool y <<
1564 depends on KEXEC_FILE <<
1565 select HAVE_IMA_KEXEC if IMA <<
1566 <<
1567 config ARCH_SUPPORTS_KEXEC_SIG <<
1568 def_bool y <<
1569 <<
1570 config ARCH_SUPPORTS_KEXEC_IMAGE_VERIFY_SIG <<
1571 def_bool y <<
1572 <<
1573 config ARCH_DEFAULT_KEXEC_IMAGE_VERIFY_SIG <<
1574 def_bool y <<
1575 <<
1576 config ARCH_SUPPORTS_CRASH_DUMP <<
1577 def_bool y <<
1578 <<
1579 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATI <<
1580 def_bool CRASH_RESERVE <<
1581 <<
1582 config TRANS_TABLE <<
1583 def_bool y <<
1584 depends on HIBERNATION || KEXEC_CORE <<
1585 <<
1586 config XEN_DOM0 <<
1587 def_bool y <<
1588 depends on XEN <<
1589 <<
1590 config XEN <<
1591 bool "Xen guest support on ARM64" <<
1592 depends on ARM64 && OF <<
1593 select SWIOTLB_XEN <<
1594 select PARAVIRT <<
1595 help <<
1596 Say Y if you want to run Linux in a <<
1597 <<
1598 # include/linux/mmzone.h requires the followi <<
1599 # <<
1600 # MAX_PAGE_ORDER + PAGE_SHIFT <= SECTION_SI <<
1601 # <<
1602 # so the maximum value of MAX_PAGE_ORDER is S <<
1603 # <<
1604 # | SECTION_SIZE_BITS | PAGE_SHIFT | m <<
1605 # ----+-------------------+--------------+--- <<
1606 # 4K | 27 | 12 | <<
1607 # 16K | 27 | 14 | <<
1608 # 64K | 29 | 16 | <<
1609 config ARCH_FORCE_MAX_ORDER <<
1610 int <<
1611 default "13" if ARM64_64K_PAGES <<
1612 default "11" if ARM64_16K_PAGES <<
1613 default "10" <<
1614 help <<
1615 The kernel page allocator limits th <<
1616 contiguous allocations. The limit i <<
1617 defines the maximal power of two of <<
1618 allocated as a single contiguous bl <<
1619 overriding the default setting when <<
1620 large blocks of physically contiguo <<
1621 <<
1622 The maximal size of allocation cann <<
1623 section, so the value of MAX_PAGE_O <<
1624 <<
1625 MAX_PAGE_ORDER + PAGE_SHIFT <= SE <<
1626 <<
1627 Don't change if unsure. <<
1628 <<
1629 config UNMAP_KERNEL_AT_EL0 <<
1630 bool "Unmap kernel when running in us <<
1631 default y 389 default y
1632 help <<
1633 Speculation attacks against some hi <<
1634 be used to bypass MMU permission ch <<
1635 userspace. This can be defended aga <<
1636 when running in userspace, mapping <<
1637 via a trampoline page in the vector <<
1638 390
1639 If unsure, say Y. !! 391 config ALPHA_EV6
1640 !! 392 bool
1641 config MITIGATE_SPECTRE_BRANCH_HISTORY !! 393 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
1642 bool "Mitigate Spectre style attacks <<
1643 default y 394 default y
1644 help <<
1645 Speculation attacks against some hi <<
1646 make use of branch history to influ <<
1647 When taking an exception from user- <<
1648 or a firmware call overwrites the b <<
1649 395
1650 config RODATA_FULL_DEFAULT_ENABLED !! 396 config ALPHA_TSUNAMI
1651 bool "Apply r/o permissions of VM are !! 397 bool
>> 398 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
1652 default y 399 default y
1653 help <<
1654 Apply read-only attributes of VM ar <<
1655 the backing pages as well. This pre <<
1656 from being modified (inadvertently <<
1657 mapping of the same memory page. Th <<
1658 be turned off at runtime by passing <<
1659 with rodata=full if this option is <<
1660 <<
1661 This requires the linear region to <<
1662 which may adversely affect performa <<
1663 400
1664 config ARM64_SW_TTBR0_PAN !! 401 config ALPHA_EV67
1665 bool "Emulate Privileged Access Never !! 402 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
1666 depends on !KCSAN !! 403 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
1667 help 404 help
1668 Enabling this option prevents the k !! 405 Is this a machine based on the EV67 core? If in doubt, select N here
1669 user-space memory directly by point !! 406 and the machine will be treated as an EV6.
1670 zeroed area and reserved ASID. The <<
1671 restore the valid TTBR0_EL1 tempora <<
1672 407
1673 config ARM64_TAGGED_ADDR_ABI !! 408 config ALPHA_EV7
1674 bool "Enable the tagged user addresse !! 409 bool
>> 410 depends on ALPHA_MARVEL
1675 default y 411 default y
1676 help <<
1677 When this option is enabled, user a <<
1678 relaxed ABI via prctl() allowing ta <<
1679 to system calls as pointer argument <<
1680 Documentation/arch/arm64/tagged-add <<
1681 <<
1682 menuconfig COMPAT <<
1683 bool "Kernel support for 32-bit EL0" <<
1684 depends on ARM64_4K_PAGES || EXPERT <<
1685 select HAVE_UID16 <<
1686 select OLD_SIGSUSPEND3 <<
1687 select COMPAT_OLD_SIGACTION <<
1688 help <<
1689 This option enables support for a 3 <<
1690 kernel at EL1. AArch32-specific com <<
1691 the user helper functions, VFP supp <<
1692 handled appropriately by the kernel <<
1693 <<
1694 If you use a page size other than 4 <<
1695 that you will only be able to execu <<
1696 with page size aligned segments. <<
1697 412
1698 If you want to execute 32-bit users !! 413 config ALPHA_MCPCIA
1699 !! 414 bool
1700 if COMPAT !! 415 depends on ALPHA_RAWHIDE
1701 <<
1702 config KUSER_HELPERS <<
1703 bool "Enable kuser helpers page for 3 <<
1704 default y 416 default y
1705 help <<
1706 Warning: disabling this option may <<
1707 <<
1708 Provide kuser helpers to compat tas <<
1709 helper code to userspace in read on <<
1710 to allow userspace to be independen <<
1711 the system. This permits binaries t <<
1712 to ARMv8 without modification. <<
1713 <<
1714 See Documentation/arch/arm/kernel_u <<
1715 <<
1716 However, the fixed address nature o <<
1717 by ROP (return orientated programmi <<
1718 exploits. <<
1719 417
1720 If all of the binaries and librarie !! 418 config ALPHA_POLARIS
1721 are built specifically for your pla !! 419 bool
1722 these helpers, then you can turn th !! 420 depends on ALPHA_RX164
1723 such exploits. However, in that cas <<
1724 relying on those helpers is run, it <<
1725 <<
1726 Say N here only if you are absolute <<
1727 need these helpers; otherwise, the <<
1728 <<
1729 config COMPAT_VDSO <<
1730 bool "Enable vDSO for 32-bit applicat <<
1731 depends on !CPU_BIG_ENDIAN <<
1732 depends on (CC_IS_CLANG && LD_IS_LLD) <<
1733 select GENERIC_COMPAT_VDSO <<
1734 default y 421 default y
1735 help <<
1736 Place in the process address space <<
1737 ELF shared object providing fast im <<
1738 and clock_gettime. <<
1739 <<
1740 You must have a 32-bit build of gli <<
1741 to seamlessly take advantage of thi <<
1742 422
1743 config THUMB2_COMPAT_VDSO !! 423 config ALPHA_IRONGATE
1744 bool "Compile the 32-bit vDSO for Thu !! 424 bool
1745 depends on COMPAT_VDSO !! 425 depends on ALPHA_NAUTILUS
1746 default y 426 default y
1747 help <<
1748 Compile the compat vDSO with '-mthu <<
1749 otherwise with '-marm'. <<
1750 <<
1751 config COMPAT_ALIGNMENT_FIXUPS <<
1752 bool "Fix up misaligned multi-word lo <<
1753 <<
1754 menuconfig ARMV8_DEPRECATED <<
1755 bool "Emulate deprecated/obsolete ARM <<
1756 depends on SYSCTL <<
1757 help <<
1758 Legacy software support may require <<
1759 that have been deprecated or obsole <<
1760 <<
1761 Enable this config to enable select <<
1762 features. <<
1763 <<
1764 If unsure, say Y <<
1765 <<
1766 if ARMV8_DEPRECATED <<
1767 <<
1768 config SWP_EMULATION <<
1769 bool "Emulate SWP/SWPB instructions" <<
1770 help <<
1771 ARMv8 obsoletes the use of A32 SWP/ <<
1772 they are always undefined. Say Y he <<
1773 emulation of these instructions for <<
1774 This feature can be controlled at r <<
1775 sysctl which is disabled by default <<
1776 <<
1777 In some older versions of glibc [<= <<
1778 trylock() operations with the assum <<
1779 be preempted. This invalid assumpti <<
1780 with SWP emulation enabled, leading <<
1781 application. <<
1782 <<
1783 NOTE: when accessing uncached share <<
1784 on an external transaction monitori <<
1785 monitor to maintain update atomicit <<
1786 implement a global monitor, this op <<
1787 perform SWP operations to uncached <<
1788 <<
1789 If unsure, say Y <<
1790 427
1791 config CP15_BARRIER_EMULATION !! 428 config ALPHA_AVANTI
1792 bool "Emulate CP15 Barrier instructio !! 429 bool
1793 help !! 430 depends on ALPHA_XL || ALPHA_AVANTI_CH
1794 The CP15 barrier instructions - CP1 <<
1795 CP15DMB - are deprecated in ARMv8 ( <<
1796 strongly recommended to use the ISB <<
1797 instructions instead. <<
1798 <<
1799 Say Y here to enable software emula <<
1800 instructions for AArch32 userspace <<
1801 enabled, CP15 barrier usage is trac <<
1802 identify software that needs updati <<
1803 controlled at runtime with the abi. <<
1804 <<
1805 If unsure, say Y <<
1806 <<
1807 config SETEND_EMULATION <<
1808 bool "Emulate SETEND instruction" <<
1809 help <<
1810 The SETEND instruction alters the d <<
1811 AArch32 EL0, and is deprecated in A <<
1812 <<
1813 Say Y here to enable software emula <<
1814 for AArch32 userspace code. This fe <<
1815 at runtime with the abi.setend sysc <<
1816 <<
1817 Note: All the cpus on the system mu <<
1818 for this feature to be enabled. If <<
1819 endian - is hotplugged in after thi <<
1820 be unexpected results in the applic <<
1821 <<
1822 If unsure, say Y <<
1823 endif # ARMV8_DEPRECATED <<
1824 <<
1825 endif # COMPAT <<
1826 <<
1827 menu "ARMv8.1 architectural features" <<
1828 <<
1829 config ARM64_HW_AFDBM <<
1830 bool "Support for hardware updates of <<
1831 default y 431 default y
1832 help 432 help
1833 The ARMv8.1 architecture extensions !! 433 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
1834 hardware updates of the access and !! 434 Alphas. Info at
1835 table entries. When enabled in TCR_ !! 435 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
1836 capable processors, accesses to pag <<
1837 set this bit instead of raising an <<
1838 Similarly, writes to read-only page <<
1839 clear the read-only bit (AP[2]) ins <<
1840 permission fault. <<
1841 436
1842 Kernels built with this configurati !! 437 config ALPHA_BROKEN_IRQ_MASK
1843 to work on pre-ARMv8.1 hardware and !! 438 bool
1844 minimal. If unsure, say Y. !! 439 depends on ALPHA_GENERIC || ALPHA_PC164
1845 <<
1846 config ARM64_PAN <<
1847 bool "Enable support for Privileged A <<
1848 default y 440 default y
1849 help <<
1850 Privileged Access Never (PAN; part <<
1851 prevents the kernel or hypervisor f <<
1852 memory directly. <<
1853 441
1854 Choosing this option will cause any !! 442 config ALPHA_SRM
1855 copy_to_user et al) memory access t !! 443 bool "Use SRM as bootloader" if ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS || ALPHA_NONAME
>> 444 default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
>> 445 ---help---
>> 446 There are two different types of booting firmware on Alphas: SRM,
>> 447 which is command line driven, and ARC, which uses menus and arrow
>> 448 keys. Details about the Linux/Alpha booting process are contained in
>> 449 the Linux/Alpha FAQ, accessible on the WWW from
>> 450 <http://www.alphalinux.org/>.
1856 451
1857 The feature is detected at runtime, !! 452 The usual way to load Linux on an Alpha machine is to use MILO
1858 instruction if the cpu does not imp !! 453 (a bootloader that lets you pass command line parameters to the
>> 454 kernel just like lilo does for the x86 architecture) which can be
>> 455 loaded either from ARC or can be installed directly as a permanent
>> 456 firmware replacement from floppy (which requires changing a certain
>> 457 jumper on the motherboard). If you want to do either of these, say N
>> 458 here. If MILO doesn't work on your system (true for Jensen
>> 459 motherboards), you can bypass it altogether and boot Linux directly
>> 460 from an SRM console; say Y here in order to do that. Note that you
>> 461 won't be able to boot from an IDE disk using SRM.
1859 462
1860 config AS_HAS_LSE_ATOMICS !! 463 If unsure, say N.
1861 def_bool $(as-instr,.arch_extension l <<
1862 464
1863 config ARM64_LSE_ATOMICS !! 465 config EARLY_PRINTK
1864 bool 466 bool
1865 default ARM64_USE_LSE_ATOMICS !! 467 depends on ALPHA_GENERIC || ALPHA_SRM
1866 depends on AS_HAS_LSE_ATOMICS <<
1867 <<
1868 config ARM64_USE_LSE_ATOMICS <<
1869 bool "Atomic instructions" <<
1870 default y 468 default y
1871 help <<
1872 As part of the Large System Extensi <<
1873 atomic instructions that are design <<
1874 very large systems. <<
1875 <<
1876 Say Y here to make use of these ins <<
1877 atomic routines. This incurs a smal <<
1878 not support these instructions and <<
1879 built with binutils >= 2.25 in orde <<
1880 to be used. <<
1881 <<
1882 endmenu # "ARMv8.1 architectural features" <<
1883 <<
1884 menu "ARMv8.2 architectural features" <<
1885 <<
1886 config AS_HAS_ARMV8_2 <<
1887 def_bool $(cc-option,-Wa$(comma)-marc <<
1888 <<
1889 config AS_HAS_SHA3 <<
1890 def_bool $(as-instr,.arch armv8.2-a+s <<
1891 469
1892 config ARM64_PMEM !! 470 config EISA
1893 bool "Enable support for persistent m !! 471 bool
1894 select ARCH_HAS_PMEM_API !! 472 depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
1895 select ARCH_HAS_UACCESS_FLUSHCACHE <<
1896 help <<
1897 Say Y to enable support for the per <<
1898 ARMv8.2 DCPoP feature. <<
1899 <<
1900 The feature is detected at runtime, <<
1901 operations if DC CVAP is not suppor <<
1902 DC CVAP itself if the system does n <<
1903 <<
1904 config ARM64_RAS_EXTN <<
1905 bool "Enable support for RAS CPU Exte <<
1906 default y 473 default y
1907 help <<
1908 CPUs that support the Reliability, <<
1909 (RAS) Extensions, part of ARMv8.2 a <<
1910 errors, classify them and report th <<
1911 474
1912 On CPUs with these extensions syste !! 475 config SMP
1913 barriers to determine if faults are !! 476 bool "Symmetric multi-processing support"
1914 classification from a new set of re !! 477 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
>> 478 ---help---
>> 479 This enables support for systems with more than one CPU. If you have
>> 480 a system with only one CPU, like most personal computers, say N. If
>> 481 you have a system with more than one CPU, say Y.
>> 482
>> 483 If you say N here, the kernel will run on single and multiprocessor
>> 484 machines, but will use only one CPU of a multiprocessor machine. If
>> 485 you say Y here, the kernel will run on many, but not all,
>> 486 singleprocessor machines. On a singleprocessor machine, the kernel
>> 487 will run faster if you say N here.
>> 488
>> 489 Note that if you say Y here and choose architecture "586" or
>> 490 "Pentium" under "Processor family", the kernel will not work on 486
>> 491 architectures. Similarly, multiprocessor kernels for the "PPro"
>> 492 architecture may not work on all Pentium based boards.
>> 493
>> 494 People using multiprocessor machines who say Y here should also say
>> 495 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
>> 496 Management" code will be disabled if you say Y here.
>> 497
>> 498 See also the <file:Documentation/smp.tex>,
>> 499 <file:Documentation/smp.txt>, <file:Documentation/i386/IO-APIC.txt>,
>> 500 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
>> 501 <http://www.tldp.org/docs.html#howto>.
1915 502
1916 Selecting this feature will allow t !! 503 If you don't know what to do here, say N.
1917 and access the new registers if the <<
1918 Platform RAS features may additiona <<
1919 504
1920 config ARM64_CNP !! 505 config HAVE_DEC_LOCK
1921 bool "Enable support for Common Not P !! 506 bool
>> 507 depends on SMP
1922 default y 508 default y
1923 depends on ARM64_PAN || !ARM64_SW_TTB <<
1924 help <<
1925 Common Not Private (CNP) allows tra <<
1926 be shared between different PEs in <<
1927 domain, so the hardware can use thi <<
1928 caching of such entries in the TLB. <<
1929 <<
1930 Selecting this option allows the CN <<
1931 at runtime, and does not affect PEs <<
1932 this feature. <<
1933 509
1934 endmenu # "ARMv8.2 architectural features" !! 510 config NR_CPUS
1935 !! 511 int "Maximum number of CPUs (2-64)"
1936 menu "ARMv8.3 architectural features" !! 512 depends on SMP
>> 513 default "64"
>> 514
>> 515 config DISCONTIGMEM
>> 516 bool "Discontiguous Memory Support (EXPERIMENTAL)"
>> 517 depends on EXPERIMENTAL
>> 518 help
>> 519 Say Y to upport efficient handling of discontiguous physical memory,
>> 520 for architectures which are either NUMA (Non-Uniform Memory Access)
>> 521 or have huge holes in the physical address space for other reasons.
>> 522 See <file:Documentation/vm/numa> for more.
1937 523
1938 config ARM64_PTR_AUTH !! 524 config NUMA
1939 bool "Enable support for pointer auth !! 525 bool "NUMA Support (EXPERIMENTAL)"
1940 default y !! 526 depends on DISCONTIGMEM
1941 help 527 help
1942 Pointer authentication (part of the !! 528 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
1943 instructions for signing and authen !! 529 Access). This option is for configuring high-end multiprocessor
1944 keys, which can be used to mitigate !! 530 server machines. If in doubt, say N.
1945 and other attacks. <<
1946 <<
1947 This option enables these instructi <<
1948 Choosing this option will cause the <<
1949 for each process at exec() time, wi <<
1950 context-switched along with the pro <<
1951 531
1952 The feature is detected at runtime. !! 532 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
1953 hardware it will not be advertised !! 533 config ALPHA_LARGE_VMALLOC
1954 be enabled. !! 534 bool
1955 !! 535 ---help---
1956 If the feature is present on the bo !! 536 Process creation and other aspects of virtual memory management can
1957 the late CPU will be parked. Also, !! 537 be streamlined if we restrict the kernel to one PGD for all vmalloc
1958 address auth and the late CPU has t !! 538 allocations. This equates to about 8GB.
1959 but with the feature disabled. On s <<
1960 not be selected. <<
1961 <<
1962 config ARM64_PTR_AUTH_KERNEL <<
1963 bool "Use pointer authentication for <<
1964 default y <<
1965 depends on ARM64_PTR_AUTH <<
1966 depends on (CC_HAS_SIGN_RETURN_ADDRES <<
1967 # Modern compilers insert a .note.gnu <<
1968 # which is only understood by binutil <<
1969 depends on LD_IS_LLD || LD_VERSION >= <<
1970 depends on !CC_IS_CLANG || AS_HAS_CFI <<
1971 depends on (!FUNCTION_GRAPH_TRACER || <<
1972 help <<
1973 If the compiler supports the -mbran <<
1974 -msign-return-address flag (e.g. GC <<
1975 will cause the kernel itself to be <<
1976 protection. In this case, and if th <<
1977 support pointer authentication, the <<
1978 disabled with minimal loss of prote <<
1979 539
1980 This feature works with FUNCTION_GR !! 540 Under normal circumstances, this is so far and above what is needed
1981 DYNAMIC_FTRACE_WITH_ARGS is enabled !! 541 as to be laughable. However, there are certain applications (such
>> 542 as benchmark-grade in-kernel web serving) that can make use of as
>> 543 much vmalloc space as is available.
1982 544
1983 config CC_HAS_BRANCH_PROT_PAC_RET !! 545 Say N unless you know you need gobs and gobs of vmalloc space.
1984 # GCC 9 or later, clang 8 or later <<
1985 def_bool $(cc-option,-mbranch-protect <<
1986 546
1987 config CC_HAS_SIGN_RETURN_ADDRESS !! 547 config VERBOSE_MCHECK
1988 # GCC 7, 8 !! 548 bool "Verbose Machine Checks"
1989 def_bool $(cc-option,-msign-return-ad <<
1990 549
1991 config AS_HAS_ARMV8_3 !! 550 config VERBOSE_MCHECK_ON
1992 def_bool $(cc-option,-Wa$(comma)-marc !! 551 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
>> 552 depends on VERBOSE_MCHECK
>> 553 default 1
>> 554 ---help---
>> 555 This option allows the default printing mode to be set, and then
>> 556 possibly overridden by a boot command argument.
1993 557
1994 config AS_HAS_CFI_NEGATE_RA_STATE !! 558 For example, if one wanted the option of printing verbose
1995 def_bool $(as-instr,.cfi_startproc\n. !! 559 machine checks, but wanted the default to be as if verbose
>> 560 machine check printing was turned off, then one would choose
>> 561 the printing mode to be 0. Then, upon reboot, one could add
>> 562 the boot command line "verbose_mcheck=1" to get the normal
>> 563 verbose machine check printing, or "verbose_mcheck=2" to get
>> 564 the maximum information available.
1996 565
1997 config AS_HAS_LDAPR !! 566 Take the default (1) unless you want more control or more info.
1998 def_bool $(as-instr,.arch_extension r <<
1999 567
2000 endmenu # "ARMv8.3 architectural features" !! 568 source "drivers/pci/Kconfig"
>> 569 source "drivers/eisa/Kconfig"
2001 570
2002 menu "ARMv8.4 architectural features" !! 571 config HOTPLUG
>> 572 bool "Support for hot-pluggable devices"
>> 573 ---help---
>> 574 Say Y here if you want to plug devices into your computer while
>> 575 the system is running, and be able to use them quickly. In many
>> 576 cases, the devices can likewise be unplugged at any time too.
2003 577
2004 config ARM64_AMU_EXTN !! 578 One well known example of this is PCMCIA- or PC-cards, credit-card
2005 bool "Enable support for the Activity !! 579 size devices such as network cards, modems or hard drives which are
2006 default y !! 580 plugged into slots found on all modern laptop computers. Another
2007 help !! 581 example, used on modern desktops as well as laptops, is USB.
2008 The activity monitors extension is <<
2009 by the ARMv8.4 CPU architecture. Th <<
2010 of the activity monitors architectu <<
2011 582
2012 To enable the use of this extension !! 583 Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
>> 584 software (at <http://linux-hotplug.sourceforge.net/>) and install it.
>> 585 Then your kernel will automatically call out to a user mode "policy
>> 586 agent" (/sbin/hotplug) to load modules and set up software needed
>> 587 to use devices as you hotplug them.
2013 588
2014 Note that for architectural reasons !! 589 source "drivers/pcmcia/Kconfig"
2015 support when running on CPUs that p <<
2016 extension. The required support is <<
2017 * Version 1.5 and later of the AR <<
2018 590
2019 For kernels that have this configur !! 591 config SRM_ENV
2020 firmware, you may need to say N her !! 592 tristate "SRM environment through procfs"
2021 Otherwise you may experience firmwa !! 593 depends on PROC_FS
2022 accessing the counter registers. Ev !! 594 ---help---
2023 symptoms, the values returned by th !! 595 If you enable this option, a subdirectory inside /proc called
2024 correctly reflect reality. Most com !! 596 /proc/srm_environment will give you access to the all important
2025 indicating that the counter is not !! 597 SRM environment variables (those which have a name) and also
>> 598 to all others (by their internal number).
2026 599
2027 config AS_HAS_ARMV8_4 !! 600 SRM is something like a BIOS for Alpha machines. There are some
2028 def_bool $(cc-option,-Wa$(comma)-marc !! 601 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 602 support (hey, that's not SRM!).
2029 603
2030 config ARM64_TLB_RANGE !! 604 Despite the fact that this driver doesn't work on all Alphas (but
2031 bool "Enable support for tlbi range f !! 605 only on those which have SRM as their firmware), it's save to
2032 default y !! 606 build it even if your particular machine doesn't know about SRM
2033 depends on AS_HAS_ARMV8_4 !! 607 (or if you intend to compile a generic kernel). It will simply
2034 help !! 608 not create those subdirectory in /proc (and give you some warning,
2035 ARMv8.4-TLBI provides TLBI invalida !! 609 of course).
2036 range of input addresses. <<
2037 610
2038 The feature introduces new assembly !! 611 This driver is also available as a module and will be called
2039 support when binutils >= 2.30. !! 612 srm_env then.
2040 613
2041 endmenu # "ARMv8.4 architectural features" !! 614 source "fs/Kconfig.binfmt"
2042 615
2043 menu "ARMv8.5 architectural features" !! 616 source "drivers/parport/Kconfig"
2044 617
2045 config AS_HAS_ARMV8_5 !! 618 endmenu
2046 def_bool $(cc-option,-Wa$(comma)-marc <<
2047 619
2048 config ARM64_BTI !! 620 source "drivers/base/Kconfig"
2049 bool "Branch Target Identification su <<
2050 default y <<
2051 help <<
2052 Branch Target Identification (part <<
2053 provides a mechanism to limit the s <<
2054 branch instructions such as BR or B <<
2055 621
2056 To make use of BTI on CPUs that sup !! 622 source "drivers/mtd/Kconfig"
2057 623
2058 BTI is intended to provide compleme !! 624 source "drivers/pnp/Kconfig"
2059 flow integrity protection mechanism <<
2060 authentication mechanism provided a <<
2061 For this reason, it does not make s <<
2062 also enabling support for pointer a <<
2063 enabling this option you should als <<
2064 625
2065 Userspace binaries must also be spe !! 626 source "drivers/block/Kconfig"
2066 this mechanism. If you say N here <<
2067 BTI, such binaries can still run, b <<
2068 enforcement of branch destinations. <<
2069 627
2070 config ARM64_BTI_KERNEL !! 628 source "drivers/md/Kconfig"
2071 bool "Use Branch Target Identificatio <<
2072 default y <<
2073 depends on ARM64_BTI <<
2074 depends on ARM64_PTR_AUTH_KERNEL <<
2075 depends on CC_HAS_BRANCH_PROT_PAC_RET <<
2076 # https://gcc.gnu.org/bugzilla/show_b <<
2077 depends on !CC_IS_GCC || GCC_VERSION <<
2078 # https://gcc.gnu.org/bugzilla/show_b <<
2079 depends on !CC_IS_GCC <<
2080 depends on (!FUNCTION_GRAPH_TRACER || <<
2081 help <<
2082 Build the kernel with Branch Target <<
2083 and enable enforcement of this for <<
2084 is enabled and the system supports <<
2085 modular code must have BTI enabled. <<
2086 629
2087 config CC_HAS_BRANCH_PROT_PAC_RET_BTI !! 630 source "drivers/ide/Kconfig"
2088 # GCC 9 or later, clang 8 or later <<
2089 def_bool $(cc-option,-mbranch-protect <<
2090 631
2091 config ARM64_E0PD !! 632 source "drivers/scsi/Kconfig"
2092 bool "Enable support for E0PD" <<
2093 default y <<
2094 help <<
2095 E0PD (part of the ARMv8.5 extension <<
2096 that EL0 accesses made via TTBR1 al <<
2097 providing similar benefits to KASLR <<
2098 with lower overhead and without dis <<
2099 kernel memory such as SPE. <<
2100 633
2101 This option enables E0PD for TTBR1 !! 634 if PCI
>> 635 source "drivers/message/fusion/Kconfig"
>> 636 endif
2102 637
2103 config ARM64_AS_HAS_MTE !! 638 source "drivers/ieee1394/Kconfig"
2104 # Initial support for MTE went in bin <<
2105 # ".arch armv8.5-a+memtag" below. How <<
2106 # as a late addition to the final arc <<
2107 # is only supported in the newer 2.32 <<
2108 # versions, hence the extra "stgm" in <<
2109 def_bool $(as-instr,.arch armv8.5-a+m <<
2110 639
2111 config ARM64_MTE !! 640 source "net/Kconfig"
2112 bool "Memory Tagging Extension suppor <<
2113 default y <<
2114 depends on ARM64_AS_HAS_MTE && ARM64_ <<
2115 depends on AS_HAS_ARMV8_5 <<
2116 depends on AS_HAS_LSE_ATOMICS <<
2117 # Required for tag checking in the ua <<
2118 depends on ARM64_PAN <<
2119 select ARCH_HAS_SUBPAGE_FAULTS <<
2120 select ARCH_USES_HIGH_VMA_FLAGS <<
2121 select ARCH_USES_PG_ARCH_2 <<
2122 select ARCH_USES_PG_ARCH_3 <<
2123 help <<
2124 Memory Tagging (part of the ARMv8.5 <<
2125 architectural support for run-time, <<
2126 various classes of memory error to <<
2127 to eliminate vulnerabilities arisin <<
2128 languages. <<
2129 641
2130 This option enables the support for !! 642 source "drivers/isdn/Kconfig"
2131 Extension at EL0 (i.e. for userspac <<
2132 643
2133 Selecting this option allows the fe !! 644 source "drivers/cdrom/Kconfig"
2134 runtime. Any secondary CPU not impl <<
2135 not be allowed a late bring-up. <<
2136 645
2137 Userspace binaries that want to use !! 646 source "drivers/input/Kconfig"
2138 explicitly opt in. The mechanism fo <<
2139 described in: <<
2140 647
2141 Documentation/arch/arm64/memory-tag !! 648 source "drivers/char/Kconfig"
2142 649
2143 endmenu # "ARMv8.5 architectural features" !! 650 #source drivers/misc/Config.in
>> 651 source "drivers/media/Kconfig"
2144 652
2145 menu "ARMv8.7 architectural features" !! 653 source "fs/Kconfig"
2146 654
2147 config ARM64_EPAN !! 655 source "drivers/video/Kconfig"
2148 bool "Enable support for Enhanced Pri <<
2149 default y <<
2150 depends on ARM64_PAN <<
2151 help <<
2152 Enhanced Privileged Access Never (E <<
2153 Access Never to be used with Execut <<
2154 656
2155 The feature is detected at runtime, !! 657 source "sound/Kconfig"
2156 if the cpu does not implement the f <<
2157 endmenu # "ARMv8.7 architectural features" <<
2158 658
2159 menu "ARMv8.9 architectural features" !! 659 source "drivers/usb/Kconfig"
2160 660
2161 config ARM64_POE !! 661 source "arch/alpha/oprofile/Kconfig"
2162 prompt "Permission Overlay Extension" <<
2163 def_bool y <<
2164 select ARCH_USES_HIGH_VMA_FLAGS <<
2165 select ARCH_HAS_PKEYS <<
2166 help <<
2167 The Permission Overlay Extension is <<
2168 Protection Keys. Memory Protection <<
2169 enforcing page-based protections, b <<
2170 of the page tables when an applicat <<
2171 662
2172 For details, see Documentation/core !! 663 menu "Kernel hacking"
2173 664
2174 If unsure, say y. !! 665 config ALPHA_LEGACY_START_ADDRESS
>> 666 bool "Legacy kernel start address"
>> 667 depends on ALPHA_GENERIC
>> 668 default n
>> 669 ---help---
>> 670 The 2.4 kernel changed the kernel start address from 0x310000
>> 671 to 0x810000 to make room for the Wildfire's larger SRM console.
>> 672 Recent consoles on Titan and Marvel machines also require the
>> 673 extra room.
2175 674
2176 config ARCH_PKEY_BITS !! 675 If you're using aboot 0.7 or later, the bootloader will examine the
2177 int !! 676 ELF headers to determine where to transfer control. Unfortunately,
2178 default 3 !! 677 most older bootloaders -- APB or MILO -- hardcoded the kernel start
>> 678 address rather than examining the ELF headers, and the result is a
>> 679 hard lockup.
2179 680
2180 endmenu # "ARMv8.9 architectural features" !! 681 Say Y if you have a broken bootloader. Say N if you do not, or if
>> 682 you wish to run on Wildfire, Titan, or Marvel.
2181 683
2182 config ARM64_SVE !! 684 config ALPHA_LEGACY_START_ADDRESS
2183 bool "ARM Scalable Vector Extension s !! 685 bool
>> 686 depends on !ALPHA_GENERIC && !ALPHA_TITAN && !ALPHA_MARVEL && !ALPHA_WILDFIRE
2184 default y 687 default y
2185 help <<
2186 The Scalable Vector Extension (SVE) <<
2187 execution state which complements a <<
2188 of the base architecture to support <<
2189 additional vectorisation opportunit <<
2190 <<
2191 To enable use of this extension on <<
2192 <<
2193 On CPUs that support the SVE2 exten <<
2194 those too. <<
2195 <<
2196 Note that for architectural reasons <<
2197 support when running on SVE capable <<
2198 is present in: <<
2199 <<
2200 * version 1.5 and later of the AR <<
2201 * the AArch64 boot wrapper since <<
2202 ("bootwrapper: SVE: Enable SVE <<
2203 <<
2204 For other firmware implementations, <<
2205 or vendor. <<
2206 <<
2207 If you need the kernel to boot on S <<
2208 firmware, you may need to say N her <<
2209 fixed. Otherwise, you may experien <<
2210 booting the kernel. If unsure and <<
2211 symptoms, you should assume that it <<
2212 688
2213 config ARM64_SME !! 689 config DEBUG_KERNEL
2214 bool "ARM Scalable Matrix Extension s !! 690 bool "Kernel debugging"
2215 default y <<
2216 depends on ARM64_SVE <<
2217 depends on BROKEN <<
2218 help 691 help
2219 The Scalable Matrix Extension (SME) !! 692 Say Y here if you are developing drivers or trying to debug and
2220 execution state which utilises a su !! 693 identify kernel problems.
2221 instruction set, together with the <<
2222 register state capable of holding t <<
2223 enable various matrix operations. <<
2224 694
2225 config ARM64_PSEUDO_NMI !! 695 config MATHEMU
2226 bool "Support for NMI-like interrupts !! 696 tristate "Kernel FP software completion" if DEBUG_KERNEL
2227 select ARM_GIC_V3 !! 697 default y if !DEBUG_KERNEL
2228 help 698 help
2229 Adds support for mimicking Non-Mask !! 699 This option is required for IEEE compliant floating point arithmetic
2230 GIC interrupt priority. This suppor !! 700 on the Alpha. The only time you would ever not say Y is to say M in
2231 ARM GIC. !! 701 order to debug the code. Say Y unless you know what you are doing.
2232 <<
2233 This high priority configuration fo <<
2234 explicitly enabled by setting the k <<
2235 "irqchip.gicv3_pseudo_nmi" to 1. <<
2236 702
2237 If unsure, say N !! 703 config DEBUG_SLAB
2238 !! 704 bool "Debug memory allocations"
2239 if ARM64_PSEUDO_NMI !! 705 depends on DEBUG_KERNEL
2240 config ARM64_DEBUG_PRIORITY_MASKING <<
2241 bool "Debug interrupt priority maskin <<
2242 help 706 help
2243 This adds runtime checks to functio !! 707 Say Y here to have the kernel do limited verification on memory
2244 interrupts when using priority mask !! 708 allocation as well as poisoning memory on free to catch use of freed
2245 the validity of ICC_PMR_EL1 when ca !! 709 memory.
2246 <<
2247 If unsure, say N <<
2248 endif # ARM64_PSEUDO_NMI <<
2249 710
2250 config RELOCATABLE !! 711 config MAGIC_SYSRQ
2251 bool "Build a relocatable kernel imag !! 712 bool "Magic SysRq key"
2252 select ARCH_HAS_RELR !! 713 depends on DEBUG_KERNEL
2253 default y <<
2254 help 714 help
2255 This builds the kernel as a Positio !! 715 If you say Y here, you will have some control over the system even
2256 which retains all relocation metada !! 716 if the system crashes for example during kernel debugging (e.g., you
2257 kernel binary at runtime to a diffe !! 717 will be able to flush the buffer cache to disk, reboot the system
2258 address it was linked at. !! 718 immediately or dump some status information). This is accomplished
2259 Since AArch64 uses the RELA relocat !! 719 by pressing various keys while holding SysRq (Alt+PrintScreen). It
2260 relocation pass at runtime even if !! 720 also works on a serial console (on PC hardware at least), if you
2261 same address it was linked at. !! 721 send a BREAK and then within 5 seconds a command keypress. The
>> 722 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
>> 723 unless you really know what this hack does.
2262 724
2263 config RANDOMIZE_BASE !! 725 config DEBUG_SPINLOCK
2264 bool "Randomize the address of the ke !! 726 bool "Spinlock debugging"
2265 select RELOCATABLE !! 727 depends on DEBUG_KERNEL
2266 help 728 help
2267 Randomizes the virtual address at w !! 729 Say Y here and build SMP to catch missing spinlock initialization
2268 loaded, as a security feature that !! 730 and certain other kinds of spinlock errors commonly made. This is
2269 relying on knowledge of the locatio !! 731 best used in conjunction with the NMI watchdog so that spinlock
2270 !! 732 deadlocks are also debuggable.
2271 It is the bootloader's job to provi <<
2272 random u64 value in /chosen/kaslr-s <<
2273 <<
2274 When booting via the UEFI stub, it <<
2275 EFI_RNG_PROTOCOL implementation (if <<
2276 to the kernel proper. In addition, <<
2277 location of the kernel Image as wel <<
2278 733
2279 If unsure, say N. !! 734 config DEBUG_RWLOCK
2280 !! 735 bool "Read-write spinlock debugging"
2281 config RANDOMIZE_MODULE_REGION_FULL !! 736 depends on DEBUG_KERNEL
2282 bool "Randomize the module region ove <<
2283 depends on RANDOMIZE_BASE <<
2284 default y <<
2285 help <<
2286 Randomizes the location of the modu <<
2287 covering the core kernel. This way, <<
2288 to leak information about the locat <<
2289 but it does imply that function cal <<
2290 kernel will need to be resolved via <<
2291 <<
2292 When this option is not set, the mo <<
2293 a limited range that contains the [ <<
2294 core kernel, so branch relocations <<
2295 the region is exhausted. In this pa <<
2296 exhaustion, modules might be able t <<
2297 <<
2298 config CC_HAVE_STACKPROTECTOR_SYSREG <<
2299 def_bool $(cc-option,-mstack-protecto <<
2300 <<
2301 config STACKPROTECTOR_PER_TASK <<
2302 def_bool y <<
2303 depends on STACKPROTECTOR && CC_HAVE_ <<
2304 <<
2305 config UNWIND_PATCH_PAC_INTO_SCS <<
2306 bool "Enable shadow call stack dynami <<
2307 # needs Clang with https://github.com <<
2308 depends on CC_IS_CLANG && CLANG_VERSI <<
2309 depends on ARM64_PTR_AUTH_KERNEL && C <<
2310 depends on SHADOW_CALL_STACK <<
2311 select UNWIND_TABLES <<
2312 select DYNAMIC_SCS <<
2313 <<
2314 config ARM64_CONTPTE <<
2315 bool "Contiguous PTE mappings for use <<
2316 depends on TRANSPARENT_HUGEPAGE <<
2317 default y <<
2318 help <<
2319 When enabled, user mappings are con <<
2320 bit, for any mappings that meet the <<
2321 This reduces TLB pressure and impro <<
2322 <<
2323 endmenu # "Kernel Features" <<
2324 <<
2325 menu "Boot options" <<
2326 <<
2327 config ARM64_ACPI_PARKING_PROTOCOL <<
2328 bool "Enable support for the ARM64 AC <<
2329 depends on ACPI <<
2330 help <<
2331 Enable support for the ARM64 ACPI p <<
2332 the kernel will not allow booting t <<
2333 protocol even if the corresponding <<
2334 MADT table. <<
2335 <<
2336 config CMDLINE <<
2337 string "Default kernel command string <<
2338 default "" <<
2339 help <<
2340 Provide a set of default command-li <<
2341 entering them here. As a minimum, y <<
2342 root device (e.g. root=/dev/nfs). <<
2343 <<
2344 choice <<
2345 prompt "Kernel command line type" <<
2346 depends on CMDLINE != "" <<
2347 default CMDLINE_FROM_BOOTLOADER <<
2348 help <<
2349 Choose how the kernel will handle t <<
2350 command line string. <<
2351 <<
2352 config CMDLINE_FROM_BOOTLOADER <<
2353 bool "Use bootloader kernel arguments <<
2354 help <<
2355 Uses the command-line options passe <<
2356 the boot loader doesn't provide any <<
2357 string provided in CMDLINE will be <<
2358 <<
2359 config CMDLINE_FORCE <<
2360 bool "Always use the default kernel c <<
2361 help <<
2362 Always use the default kernel comma <<
2363 loader passes other arguments to th <<
2364 This is useful if you cannot or don <<
2365 command-line options your boot load <<
2366 <<
2367 endchoice <<
2368 <<
2369 config EFI_STUB <<
2370 bool <<
2371 <<
2372 config EFI <<
2373 bool "UEFI runtime support" <<
2374 depends on OF && !CPU_BIG_ENDIAN <<
2375 depends on KERNEL_MODE_NEON <<
2376 select ARCH_SUPPORTS_ACPI <<
2377 select LIBFDT <<
2378 select UCS2_STRING <<
2379 select EFI_PARAMS_FROM_FDT <<
2380 select EFI_RUNTIME_WRAPPERS <<
2381 select EFI_STUB <<
2382 select EFI_GENERIC_STUB <<
2383 imply IMA_SECURE_AND_OR_TRUSTED_BOOT <<
2384 default y <<
2385 help 737 help
2386 This option provides support for ru !! 738 If you say Y here then read-write lock processing will count how many
2387 by UEFI firmware (such as non-volat !! 739 times it has tried to get the lock and issue an error message after
2388 clock, and platform reset). A UEFI !! 740 too many attempts. If you suspect a rwlock problem or a kernel
2389 allow the kernel to be booted as an !! 741 hacker asks for this option then say Y. Otherwise say N.
2390 is only useful on systems that have <<
2391 742
2392 config COMPRESSED_INSTALL !! 743 config DEBUG_SEMAPHORE
2393 bool "Install compressed image by def !! 744 bool "Semaphore debugging"
>> 745 depends on DEBUG_KERNEL
2394 help 746 help
2395 This makes the regular "make instal !! 747 If you say Y here then semaphore processing will issue lots of
2396 image we built, not the legacy unco !! 748 verbose debugging messages. If you suspect a semaphore problem or a
2397 !! 749 kernel hacker asks for this option then say Y. Otherwise say N.
2398 You can check that a compressed ima <<
2399 "make zinstall" first, and verifyin <<
2400 in your environment before making " <<
2401 you. <<
2402 750
2403 config DMI !! 751 config DEBUG_INFO
2404 bool "Enable support for SMBIOS (DMI) !! 752 bool "Compile the kernel with debug info"
2405 depends on EFI !! 753 depends on DEBUG_KERNEL
2406 default y <<
2407 help 754 help
2408 This enables SMBIOS/DMI feature for !! 755 If you say Y here the resulting kernel image will include
2409 !! 756 debugging info resulting in a larger kernel image.
2410 This option is only useful on syste !! 757 Say Y here only if you plan to use gdb to debug the kernel.
2411 However, even with this option, the !! 758 If you don't debug the kernel, you can say N.
2412 continue to boot on existing non-UE <<
2413 <<
2414 endmenu # "Boot options" <<
2415 <<
2416 menu "Power management options" <<
2417 <<
2418 source "kernel/power/Kconfig" <<
2419 <<
2420 config ARCH_HIBERNATION_POSSIBLE <<
2421 def_bool y <<
2422 depends on CPU_PM <<
2423 <<
2424 config ARCH_HIBERNATION_HEADER <<
2425 def_bool y <<
2426 depends on HIBERNATION <<
2427 <<
2428 config ARCH_SUSPEND_POSSIBLE <<
2429 def_bool y <<
2430 <<
2431 endmenu # "Power management options" <<
2432 <<
2433 menu "CPU Power Management" <<
2434 <<
2435 source "drivers/cpuidle/Kconfig" <<
2436 759
2437 source "drivers/cpufreq/Kconfig" !! 760 endmenu
2438 761
2439 endmenu # "CPU Power Management" !! 762 source "security/Kconfig"
2440 763
2441 source "drivers/acpi/Kconfig" !! 764 source "crypto/Kconfig"
2442 765
2443 source "arch/arm64/kvm/Kconfig" !! 766 source "lib/Kconfig"
2444 767
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