1 # SPDX-License-Identifier: GPL-2.0-only !! 1 # SPDX-License-Identifier: GPL-2.0
2 # !! 2 config ALPHA
3 # For a description of the syntax of this conf <<
4 # see Documentation/kbuild/kconfig-language.rs <<
5 # <<
6 <<
7 config 64BIT <<
8 bool <<
9 <<
10 config 32BIT <<
11 bool 3 bool
12 !! 4 default y
13 config RISCV !! 5 select ARCH_32BIT_USTAT_F_TINODE
14 def_bool y <<
15 select ACPI_GENERIC_GSI if ACPI <<
16 select ACPI_MCFG if (ACPI && PCI) <<
17 select ACPI_PPTT if ACPI <<
18 select ACPI_REDUCED_HARDWARE_ONLY if A <<
19 select ACPI_SPCR_TABLE if ACPI <<
20 select ARCH_DMA_DEFAULT_COHERENT <<
21 select ARCH_ENABLE_HUGEPAGE_MIGRATION <<
22 select ARCH_ENABLE_MEMORY_HOTPLUG if S <<
23 select ARCH_ENABLE_MEMORY_HOTREMOVE if <<
24 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if <<
25 select ARCH_ENABLE_THP_MIGRATION if TR <<
26 select ARCH_HAS_BINFMT_FLAT <<
27 select ARCH_HAS_CURRENT_STACK_POINTER 6 select ARCH_HAS_CURRENT_STACK_POINTER
28 select ARCH_HAS_DEBUG_VIRTUAL if MMU !! 7 select ARCH_HAS_DMA_OPS if PCI
29 select ARCH_HAS_DEBUG_VM_PGTABLE !! 8 select ARCH_MIGHT_HAVE_PC_PARPORT
30 select ARCH_HAS_DEBUG_WX !! 9 select ARCH_MIGHT_HAVE_PC_SERIO
31 select ARCH_HAS_FAST_MULTIPLIER !! 10 select ARCH_NO_PREEMPT
32 select ARCH_HAS_FORTIFY_SOURCE !! 11 select ARCH_NO_SG_CHAIN
33 select ARCH_HAS_GCOV_PROFILE_ALL !! 12 select ARCH_USE_CMPXCHG_LOCKREF
34 select ARCH_HAS_GIGANTIC_PAGE !! 13 select FORCE_PCI
35 select ARCH_HAS_KCOV !! 14 select PCI_DOMAINS if PCI
36 select ARCH_HAS_KERNEL_FPU_SUPPORT if !! 15 select PCI_SYSCALL if PCI
37 select ARCH_HAS_MEMBARRIER_CALLBACKS !! 16 select HAVE_ASM_MODVERSIONS
38 select ARCH_HAS_MEMBARRIER_SYNC_CORE !! 17 select HAVE_PAGE_SIZE_8KB
39 select ARCH_HAS_MMIOWB !! 18 select HAVE_PCSPKR_PLATFORM
40 select ARCH_HAS_NON_OVERLAPPING_ADDRES !! 19 select HAVE_PERF_EVENTS
41 select ARCH_HAS_PMEM_API !! 20 select NEED_DMA_MAP_STATE
42 select ARCH_HAS_PREPARE_SYNC_CORE_CMD !! 21 select NEED_SG_DMA_LENGTH
43 select ARCH_HAS_PTE_DEVMAP if 64BIT && !! 22 select GENERIC_IRQ_PROBE
44 select ARCH_HAS_PTE_SPECIAL <<
45 select ARCH_HAS_SET_DIRECT_MAP if MMU <<
46 select ARCH_HAS_SET_MEMORY if MMU <<
47 select ARCH_HAS_STRICT_KERNEL_RWX if M <<
48 select ARCH_HAS_STRICT_MODULE_RWX if M <<
49 select ARCH_HAS_SYNC_CORE_BEFORE_USERM <<
50 select ARCH_HAS_SYSCALL_WRAPPER <<
51 select ARCH_HAS_TICK_BROADCAST if GENE <<
52 select ARCH_HAS_UBSAN <<
53 select ARCH_HAS_VDSO_DATA <<
54 select ARCH_KEEP_MEMBLOCK if ACPI <<
55 select ARCH_MHP_MEMMAP_ON_MEMORY_ENABL <<
56 select ARCH_OPTIONAL_KERNEL_RWX if ARC <<
57 select ARCH_OPTIONAL_KERNEL_RWX_DEFAUL <<
58 select ARCH_STACKWALK <<
59 select ARCH_SUPPORTS_ATOMIC_RMW <<
60 select ARCH_SUPPORTS_CFI_CLANG <<
61 select ARCH_SUPPORTS_DEBUG_PAGEALLOC i <<
62 select ARCH_SUPPORTS_HUGETLBFS if MMU <<
63 # LLD >= 14: https://github.com/llvm/l <<
64 select ARCH_SUPPORTS_LTO_CLANG if LLD_ <<
65 select ARCH_SUPPORTS_LTO_CLANG_THIN if <<
66 select ARCH_SUPPORTS_PAGE_TABLE_CHECK <<
67 select ARCH_SUPPORTS_PER_VMA_LOCK if M <<
68 select ARCH_SUPPORTS_RT <<
69 select ARCH_SUPPORTS_SHADOW_CALL_STACK <<
70 select ARCH_USE_CMPXCHG_LOCKREF if 64B <<
71 select ARCH_USE_MEMTEST <<
72 select ARCH_USE_QUEUED_RWLOCKS <<
73 select ARCH_USE_SYM_ANNOTATIONS <<
74 select ARCH_USES_CFI_TRAPS if CFI_CLAN <<
75 select ARCH_WANT_BATCHED_UNMAP_TLB_FLU <<
76 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_ <<
77 select ARCH_WANT_FRAME_POINTERS <<
78 select ARCH_WANT_GENERAL_HUGETLB if !R <<
79 select ARCH_WANT_HUGE_PMD_SHARE if 64B <<
80 select ARCH_WANT_LD_ORPHAN_WARN if !XI <<
81 select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP <<
82 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEM <<
83 select ARCH_WANTS_NO_INSTR <<
84 select ARCH_WANTS_THP_SWAP if HAVE_ARC <<
85 select BINFMT_FLAT_NO_DATA_START_OFFSE <<
86 select BUILDTIME_TABLE_SORT if MMU <<
87 select CLINT_TIMER if RISCV_M_MODE <<
88 select CLONE_BACKWARDS <<
89 select COMMON_CLK <<
90 select CPU_PM if CPU_IDLE || HIBERNATI <<
91 select EDAC_SUPPORT <<
92 select FRAME_POINTER if PERF_EVENTS || <<
93 select FTRACE_MCOUNT_USE_PATCHABLE_FUN <<
94 select GENERIC_ARCH_TOPOLOGY <<
95 select GENERIC_ATOMIC64 if !64BIT <<
96 select GENERIC_CLOCKEVENTS_BROADCAST i <<
97 select GENERIC_CPU_DEVICES <<
98 select GENERIC_CPU_VULNERABILITIES <<
99 select GENERIC_EARLY_IOREMAP <<
100 select GENERIC_ENTRY <<
101 select GENERIC_GETTIMEOFDAY if HAVE_GE <<
102 select GENERIC_IDLE_POLL_SETUP <<
103 select GENERIC_IOREMAP if MMU <<
104 select GENERIC_IRQ_IPI if SMP <<
105 select GENERIC_IRQ_IPI_MUX if SMP <<
106 select GENERIC_IRQ_MULTI_HANDLER <<
107 select GENERIC_IRQ_SHOW <<
108 select GENERIC_IRQ_SHOW_LEVEL <<
109 select GENERIC_LIB_DEVMEM_IS_ALLOWED <<
110 select GENERIC_PCI_IOMAP 23 select GENERIC_PCI_IOMAP
111 select GENERIC_PTDUMP if MMU !! 24 select AUTO_IRQ_AFFINITY if SMP
112 select GENERIC_SCHED_CLOCK !! 25 select GENERIC_IRQ_SHOW
>> 26 select ARCH_WANT_IPC_PARSE_VERSION
>> 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG
>> 28 select AUDIT_ARCH
>> 29 select GENERIC_CPU_VULNERABILITIES
113 select GENERIC_SMP_IDLE_THREAD 30 select GENERIC_SMP_IDLE_THREAD
114 select GENERIC_TIME_VSYSCALL if MMU && !! 31 select HAS_IOPORT
115 select GENERIC_VDSO_TIME_NS if HAVE_GE <<
116 select HARDIRQS_SW_RESEND <<
117 select HAS_IOPORT if MMU <<
118 select HAVE_ARCH_AUDITSYSCALL 32 select HAVE_ARCH_AUDITSYSCALL
119 select HAVE_ARCH_HUGE_VMALLOC if HAVE_ !! 33 select HAVE_MOD_ARCH_SPECIFIC
120 select HAVE_ARCH_HUGE_VMAP if MMU && 6 <<
121 select HAVE_ARCH_JUMP_LABEL if !XIP_KE <<
122 select HAVE_ARCH_JUMP_LABEL_RELATIVE i <<
123 select HAVE_ARCH_KASAN if MMU && 64BIT <<
124 select HAVE_ARCH_KASAN_VMALLOC if MMU <<
125 select HAVE_ARCH_KFENCE if MMU && 64BI <<
126 select HAVE_ARCH_KGDB if !XIP_KERNEL <<
127 select HAVE_ARCH_KGDB_QXFER_PKT <<
128 select HAVE_ARCH_MMAP_RND_BITS if MMU <<
129 select HAVE_ARCH_MMAP_RND_COMPAT_BITS <<
130 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS <<
131 select HAVE_ARCH_SECCOMP_FILTER <<
132 select HAVE_ARCH_STACKLEAK <<
133 select HAVE_ARCH_THREAD_STRUCT_WHITELI <<
134 select HAVE_ARCH_TRACEHOOK <<
135 select HAVE_ARCH_TRANSPARENT_HUGEPAGE <<
136 select HAVE_ARCH_USERFAULTFD_MINOR if <<
137 select HAVE_ARCH_VMAP_STACK if MMU && <<
138 select HAVE_ASM_MODVERSIONS <<
139 select HAVE_CONTEXT_TRACKING_USER <<
140 select HAVE_DEBUG_KMEMLEAK <<
141 select HAVE_DMA_CONTIGUOUS if MMU <<
142 select HAVE_DYNAMIC_FTRACE if !XIP_KER <<
143 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT <<
144 select HAVE_DYNAMIC_FTRACE_WITH_ARGS i <<
145 select HAVE_FTRACE_MCOUNT_RECORD if !X <<
146 select HAVE_FUNCTION_GRAPH_TRACER <<
147 select HAVE_FUNCTION_GRAPH_RETVAL if H <<
148 select HAVE_FUNCTION_TRACER if !XIP_KE <<
149 select HAVE_EBPF_JIT if MMU <<
150 select HAVE_GUP_FAST if MMU <<
151 select HAVE_FUNCTION_ARG_ACCESS_API <<
152 select HAVE_FUNCTION_ERROR_INJECTION <<
153 select HAVE_GCC_PLUGINS <<
154 select HAVE_GENERIC_VDSO if MMU && 64B <<
155 select HAVE_IRQ_TIME_ACCOUNTING <<
156 select HAVE_KERNEL_BZIP2 if !XIP_KERNE <<
157 select HAVE_KERNEL_GZIP if !XIP_KERNEL <<
158 select HAVE_KERNEL_LZ4 if !XIP_KERNEL <<
159 select HAVE_KERNEL_LZMA if !XIP_KERNEL <<
160 select HAVE_KERNEL_LZO if !XIP_KERNEL <<
161 select HAVE_KERNEL_UNCOMPRESSED if !XI <<
162 select HAVE_KERNEL_ZSTD if !XIP_KERNEL <<
163 select HAVE_KERNEL_XZ if !XIP_KERNEL & <<
164 select HAVE_KPROBES if !XIP_KERNEL <<
165 select HAVE_KRETPROBES if !XIP_KERNEL <<
166 # https://github.com/ClangBuiltLinux/l <<
167 select HAVE_LD_DEAD_CODE_DATA_ELIMINAT <<
168 select HAVE_MOVE_PMD <<
169 select HAVE_MOVE_PUD <<
170 select HAVE_PAGE_SIZE_4KB <<
171 select HAVE_PCI <<
172 select HAVE_PERF_EVENTS <<
173 select HAVE_PERF_REGS <<
174 select HAVE_PERF_USER_STACK_DUMP <<
175 select HAVE_POSIX_CPU_TIMERS_TASK_WORK <<
176 select HAVE_PREEMPT_DYNAMIC_KEY if !XI <<
177 select HAVE_REGS_AND_STACK_ACCESS_API <<
178 select HAVE_RETHOOK if !XIP_KERNEL <<
179 select HAVE_RSEQ <<
180 select HAVE_RUST if RUSTC_SUPPORTS_RIS <<
181 select HAVE_SAMPLE_FTRACE_DIRECT <<
182 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI <<
183 select HAVE_STACKPROTECTOR <<
184 select HAVE_SYSCALL_TRACEPOINTS <<
185 select HOTPLUG_CORE_SYNC_DEAD if HOTPL <<
186 select IRQ_DOMAIN <<
187 select IRQ_FORCED_THREADING <<
188 select KASAN_VMALLOC if KASAN <<
189 select LOCK_MM_AND_FIND_VMA 34 select LOCK_MM_AND_FIND_VMA
190 select MMU_GATHER_RCU_TABLE_FREE if SM !! 35 select MODULES_USE_ELF_RELA
191 select MODULES_USE_ELF_RELA if MODULES !! 36 select ODD_RT_SIGACTION
192 select OF !! 37 select OLD_SIGSUSPEND
193 select OF_EARLY_FLATTREE !! 38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
194 select OF_IRQ !! 39 select MMU_GATHER_NO_RANGE
195 select PCI_DOMAINS_GENERIC if PCI !! 40 select SPARSEMEM_EXTREME if SPARSEMEM
196 select PCI_ECAM if (ACPI && PCI) !! 41 select ZONE_DMA
197 select PCI_MSI if PCI !! 42 help
198 select RISCV_ALTERNATIVE if !XIP_KERNE !! 43 The Alpha is a 64-bit general-purpose processor designed and
199 select RISCV_APLIC !! 44 marketed by the Digital Equipment Corporation of blessed memory,
200 select RISCV_IMSIC !! 45 now Hewlett-Packard. The Alpha Linux project has a home page at
201 select RISCV_INTC !! 46 <http://www.alphalinux.org/>.
202 select RISCV_TIMER if RISCV_SBI <<
203 select SIFIVE_PLIC <<
204 select SPARSE_IRQ <<
205 select SYSCTL_EXCEPTION_TRACE <<
206 select THREAD_INFO_IN_TASK <<
207 select TRACE_IRQFLAGS_SUPPORT <<
208 select UACCESS_MEMCPY if !MMU <<
209 select USER_STACKTRACE_SUPPORT <<
210 select ZONE_DMA32 if 64BIT <<
211 <<
212 config RUSTC_SUPPORTS_RISCV <<
213 def_bool y <<
214 depends on 64BIT <<
215 # Shadow call stack requires rustc ver <<
216 # -Zsanitizer=shadow-call-stack flag. <<
217 depends on !SHADOW_CALL_STACK || RUSTC <<
218 <<
219 config CLANG_SUPPORTS_DYNAMIC_FTRACE <<
220 def_bool CC_IS_CLANG <<
221 # https://github.com/ClangBuiltLinux/l <<
222 depends on AS_IS_GNU || (AS_IS_LLVM && <<
223 <<
224 config GCC_SUPPORTS_DYNAMIC_FTRACE <<
225 def_bool CC_IS_GCC <<
226 depends on $(cc-option,-fpatchable-fun <<
227 <<
228 config HAVE_SHADOW_CALL_STACK <<
229 def_bool $(cc-option,-fsanitize=shadow <<
230 # https://github.com/riscv-non-isa/ris <<
231 depends on $(ld-option,--no-relax-gp) <<
232 <<
233 config RISCV_USE_LINKER_RELAXATION <<
234 def_bool y <<
235 # https://github.com/llvm/llvm-project <<
236 depends on !LD_IS_LLD || LLD_VERSION > <<
237 47
238 # https://github.com/llvm/llvm-project/commit/ !! 48 config 64BIT
239 config ARCH_HAS_BROKEN_DWARF5 <<
240 def_bool y 49 def_bool y
241 depends on RISCV_USE_LINKER_RELAXATION <<
242 # https://github.com/llvm/llvm-project <<
243 depends on AS_IS_LLVM && AS_VERSION < <<
244 # https://github.com/llvm/llvm-project <<
245 depends on LD_IS_LLD && LLD_VERSION < <<
246 <<
247 config ARCH_MMAP_RND_BITS_MIN <<
248 default 18 if 64BIT <<
249 default 8 <<
250 <<
251 config ARCH_MMAP_RND_COMPAT_BITS_MIN <<
252 default 8 <<
253 <<
254 # max bits determined by the following formula <<
255 # VA_BITS - PAGE_SHIFT - 3 <<
256 config ARCH_MMAP_RND_BITS_MAX <<
257 default 24 if 64BIT # SV39 based <<
258 default 17 <<
259 <<
260 config ARCH_MMAP_RND_COMPAT_BITS_MAX <<
261 default 17 <<
262 <<
263 # set if we run in machine mode, cleared if we <<
264 config RISCV_M_MODE <<
265 bool "Build a kernel that runs in mach <<
266 depends on !MMU <<
267 default y <<
268 help <<
269 Select this option if you want to ru <<
270 without the assistance of any other <<
271 <<
272 # set if we are running in S-mode and can use <<
273 config RISCV_SBI <<
274 bool <<
275 depends on !RISCV_M_MODE <<
276 default y <<
277 50
278 config MMU 51 config MMU
279 bool "MMU-based Paged Memory Managemen !! 52 bool
280 default y 53 default y
281 help <<
282 Select if you want MMU-based virtual <<
283 support by paged memory management. <<
284 <<
285 config PAGE_OFFSET <<
286 hex <<
287 default 0x80000000 if !MMU && RISCV_M_ <<
288 default 0x80200000 if !MMU <<
289 default 0xc0000000 if 32BIT <<
290 default 0xff60000000000000 if 64BIT <<
291 <<
292 config KASAN_SHADOW_OFFSET <<
293 hex <<
294 depends on KASAN_GENERIC <<
295 default 0xdfffffff00000000 if 64BIT <<
296 default 0xffffffff if 32BIT <<
297 <<
298 config ARCH_FLATMEM_ENABLE <<
299 def_bool !NUMA <<
300 <<
301 config ARCH_SPARSEMEM_ENABLE <<
302 def_bool y <<
303 depends on MMU <<
304 select SPARSEMEM_STATIC if 32BIT && SP <<
305 select SPARSEMEM_VMEMMAP_ENABLE if 64B <<
306 <<
307 config ARCH_SELECT_MEMORY_MODEL <<
308 def_bool ARCH_SPARSEMEM_ENABLE <<
309 <<
310 config ARCH_SUPPORTS_UPROBES <<
311 def_bool y <<
312 <<
313 config STACKTRACE_SUPPORT <<
314 def_bool y <<
315 54
316 config GENERIC_BUG !! 55 config ARCH_HAS_ILOG2_U32
317 def_bool y !! 56 bool
318 depends on BUG !! 57 default n
319 select GENERIC_BUG_RELATIVE_POINTERS i <<
320 58
321 config GENERIC_BUG_RELATIVE_POINTERS !! 59 config ARCH_HAS_ILOG2_U64
322 bool 60 bool
>> 61 default n
323 62
324 config GENERIC_CALIBRATE_DELAY 63 config GENERIC_CALIBRATE_DELAY
325 def_bool y !! 64 bool
326 !! 65 default y
327 config GENERIC_CSUM <<
328 def_bool y <<
329 <<
330 config GENERIC_HWEIGHT <<
331 def_bool y <<
332 <<
333 config FIX_EARLYCON_MEM <<
334 def_bool MMU <<
335 66
336 config ILLEGAL_POINTER_VALUE !! 67 config GENERIC_ISA_DMA
337 hex !! 68 bool
338 default 0 if 32BIT !! 69 default y
339 default 0xdead000000000000 if 64BIT <<
340 70
341 config PGTABLE_LEVELS 71 config PGTABLE_LEVELS
342 int 72 int
343 default 5 if 64BIT !! 73 default 3
344 default 2 <<
345 74
346 config LOCKDEP_SUPPORT !! 75 config AUDIT_ARCH
347 def_bool y <<
348 <<
349 config RISCV_DMA_NONCOHERENT <<
350 bool 76 bool
351 select ARCH_HAS_DMA_PREP_COHERENT <<
352 select ARCH_HAS_SETUP_DMA_OPS <<
353 select ARCH_HAS_SYNC_DMA_FOR_CPU <<
354 select ARCH_HAS_SYNC_DMA_FOR_DEVICE <<
355 select DMA_BOUNCE_UNALIGNED_KMALLOC if <<
356 77
357 config RISCV_NONSTANDARD_CACHE_OPS !! 78 menu "System setup"
358 bool <<
359 help <<
360 This enables function pointer suppor <<
361 systems to handle cache management. <<
362 79
363 config AS_HAS_INSN !! 80 choice
364 def_bool $(as-instr,.insn r 51$(comma) !! 81 prompt "Alpha system type"
>> 82 default ALPHA_GENERIC
>> 83 help
>> 84 This is the system type of your hardware. A "generic" kernel will
>> 85 run on any supported Alpha system. However, if you configure a
>> 86 kernel for your specific system, it will be faster and smaller.
365 87
366 config AS_HAS_OPTION_ARCH !! 88 To find out what type of Alpha system you have, you may want to
367 # https://github.com/llvm/llvm-project !! 89 check out the Linux/Alpha FAQ, accessible on the WWW from
368 def_bool y !! 90 <http://www.alphalinux.org/>. In summary:
369 depends on $(as-instr, .option arch$(c <<
370 91
371 source "arch/riscv/Kconfig.socs" !! 92 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
372 source "arch/riscv/Kconfig.errata" !! 93 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
>> 94 LX164 AlphaPC164-LX
>> 95 Miata Personal Workstation 433/500/600 a/au
>> 96 Marvel AlphaServer ES47 / ES80 / GS1280
>> 97 Mikasa AS 1000
>> 98 Noritake AS 1000A, AS 600A, AS 800
>> 99 PC164 AlphaPC164
>> 100 Rawhide AS 1200, AS 4000, AS 4100
>> 101 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
>> 102 SX164 AlphaPC164-SX
>> 103 Sable AS 2000, AS 2100
>> 104 Shark DS 20L
>> 105 Takara Takara (OEM)
>> 106 Titan AlphaServer ES45 / DS25 / DS15
>> 107 Wildfire AlphaServer GS 40/80/160/320
373 108
374 menu "Platform type" !! 109 If you don't know what to do, choose "generic".
375 110
376 config NONPORTABLE !! 111 config ALPHA_GENERIC
377 bool "Allow configurations that result !! 112 bool "Generic"
>> 113 depends on TTY
>> 114 select HAVE_EISA
378 help 115 help
379 RISC-V kernel binaries are compatibl !! 116 A generic kernel will run on all supported Alpha hardware.
380 whenever possible, but there are som <<
381 satisfied by configurations that res <<
382 not portable between systems. <<
383 117
384 Selecting N does not guarantee kerne !! 118 config ALPHA_ALCOR
385 systems. Selecting any of the optio !! 119 bool "Alcor/Alpha-XLT"
386 result in kernel binaries that are u !! 120 select HAVE_EISA
387 systems. <<
388 <<
389 If unsure, say N. <<
390 <<
391 choice <<
392 prompt "Base ISA" <<
393 default ARCH_RV64I <<
394 help 121 help
395 This selects the base ISA that this !! 122 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
396 the target platform. !! 123 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
397 !! 124 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
398 config ARCH_RV32I !! 125 controller (256-bit memory bus) and a PCI interface. It also does
399 bool "RV32I" !! 126 all the work required to support an external Bcache and to maintain
400 depends on NONPORTABLE !! 127 memory coherence when a PCI device DMAs into (or out of) memory.
401 select 32BIT <<
402 select GENERIC_LIB_ASHLDI3 <<
403 select GENERIC_LIB_ASHRDI3 <<
404 select GENERIC_LIB_LSHRDI3 <<
405 select GENERIC_LIB_UCMPDI2 <<
406 <<
407 config ARCH_RV64I <<
408 bool "RV64I" <<
409 select 64BIT <<
410 select ARCH_SUPPORTS_INT128 if CC_HAS_ <<
411 select SWIOTLB if MMU <<
412 128
413 endchoice !! 129 config ALPHA_DP264
>> 130 bool "DP264"
>> 131 help
>> 132 Various 21264 systems with the tsunami core logic chipset.
>> 133 API Networks: 264DP, UP2000(+), CS20;
>> 134 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
414 135
415 # We must be able to map all physical memory i !! 136 config ALPHA_EIGER
416 # is still a bit more efficient when generatin !! 137 bool "Eiger"
417 # such that it can only map 2GiB of memory. !! 138 help
418 choice !! 139 Apparently an obscure OEM single-board computer based on the
419 prompt "Kernel Code Model" !! 140 Typhoon/Tsunami chipset family. Information on it is scanty.
420 default CMODEL_MEDLOW if 32BIT <<
421 default CMODEL_MEDANY if 64BIT <<
422 <<
423 config CMODEL_MEDLOW <<
424 bool "medium low code model" <<
425 config CMODEL_MEDANY <<
426 bool "medium any code model" <<
427 endchoice <<
428 141
429 config MODULE_SECTIONS !! 142 config ALPHA_LX164
430 bool !! 143 bool "LX164"
431 select HAVE_MOD_ARCH_SPECIFIC !! 144 help
>> 145 A technical overview of this board is available at
>> 146 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
432 147
433 config SMP !! 148 config ALPHA_MARVEL
434 bool "Symmetric Multi-Processing" !! 149 bool "Marvel"
435 help 150 help
436 This enables support for systems wit !! 151 AlphaServer ES47 / ES80 / GS1280 based on EV7.
437 you say N here, the kernel will run <<
438 multiprocessor machines, but will us <<
439 multiprocessor machine. If you say Y <<
440 on many, but not all, single process <<
441 processor machine, the kernel will r <<
442 here. <<
443 152
444 If you don't know what to do here, s !! 153 config ALPHA_MIATA
>> 154 bool "Miata"
>> 155 select HAVE_EISA
>> 156 help
>> 157 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
>> 158 or 600au).
445 159
446 config SCHED_MC !! 160 config ALPHA_MIKASA
447 bool "Multi-core scheduler support" !! 161 bool "Mikasa"
448 depends on SMP <<
449 help 162 help
450 Multi-core scheduler support improve !! 163 AlphaServer 1000-based Alpha systems.
451 making when dealing with multi-core <<
452 increased overhead in some places. I <<
453 164
454 config NR_CPUS !! 165 config ALPHA_NAUTILUS
455 int "Maximum number of CPUs (2-512)" !! 166 bool "Nautilus"
456 depends on SMP !! 167 help
457 range 2 512 if !RISCV_SBI_V01 !! 168 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
458 range 2 32 if RISCV_SBI_V01 && 32BIT <<
459 range 2 64 if RISCV_SBI_V01 && 64BIT <<
460 default "32" if 32BIT <<
461 default "64" if 64BIT <<
462 169
463 config HOTPLUG_CPU !! 170 config ALPHA_NORITAKE
464 bool "Support for hot-pluggable CPUs" !! 171 bool "Noritake"
465 depends on SMP !! 172 select HAVE_EISA
466 select GENERIC_IRQ_MIGRATION <<
467 help 173 help
>> 174 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
>> 175 systems.
468 176
469 Say Y here to experiment with turnin !! 177 config ALPHA_PC164
470 can be controlled through /sys/devic !! 178 bool "PC164"
471 179
472 Say N if you want to disable CPU hot !! 180 config ALPHA_RAWHIDE
>> 181 bool "Rawhide"
>> 182 select HAVE_EISA
>> 183 help
>> 184 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
>> 185 See HOWTO at
>> 186 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
473 187
474 choice !! 188 config ALPHA_RUFFIAN
475 prompt "CPU Tuning" !! 189 bool "Ruffian"
476 default TUNE_GENERIC !! 190 help
>> 191 Samsung APC164UX. There is a page on known problems and workarounds
>> 192 at <http://www.alphalinux.org/faq/FAQ-11.html>.
477 193
478 config TUNE_GENERIC !! 194 config ALPHA_RX164
479 bool "generic" !! 195 bool "RX164"
480 196
481 endchoice !! 197 config ALPHA_SX164
>> 198 bool "SX164"
482 199
483 # Common NUMA Features !! 200 config ALPHA_SABLE
484 config NUMA !! 201 bool "Sable"
485 bool "NUMA Memory Allocation and Sched !! 202 select HAVE_EISA
486 depends on SMP && MMU <<
487 select ARCH_SUPPORTS_NUMA_BALANCING <<
488 select GENERIC_ARCH_NUMA <<
489 select HAVE_SETUP_PER_CPU_AREA <<
490 select NEED_PER_CPU_EMBED_FIRST_CHUNK <<
491 select NEED_PER_CPU_PAGE_FIRST_CHUNK <<
492 select OF_NUMA <<
493 select USE_PERCPU_NUMA_NODE_ID <<
494 help 203 help
495 Enable NUMA (Non-Uniform Memory Acce !! 204 Digital AlphaServer 2000 and 2100-based systems.
496 205
497 The kernel will try to allocate memo !! 206 config ALPHA_SHARK
498 local memory of the CPU and add some !! 207 bool "Shark"
499 208
500 config NODES_SHIFT !! 209 config ALPHA_TAKARA
501 int "Maximum NUMA Nodes (as a power of !! 210 bool "Takara"
502 range 1 10 <<
503 default "2" <<
504 depends on NUMA <<
505 help 211 help
506 Specify the maximum number of NUMA N !! 212 Alpha 11164-based OEM single-board computer.
507 system. Increases memory reserved t <<
508 213
509 config RISCV_ALTERNATIVE !! 214 config ALPHA_TITAN
510 bool !! 215 bool "Titan"
511 depends on !XIP_KERNEL <<
512 help 216 help
513 This Kconfig allows the kernel to au !! 217 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
514 erratum or cpufeature required by th <<
515 time. The code patching overhead is <<
516 once at boot and once on each module <<
517 218
518 config RISCV_ALTERNATIVE_EARLY !! 219 config ALPHA_WILDFIRE
519 bool !! 220 bool "Wildfire"
520 depends on RISCV_ALTERNATIVE <<
521 help 221 help
522 Allows early patching of the kernel !! 222 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
523 223
524 config RISCV_ISA_C !! 224 endchoice
525 bool "Emit compressed instructions whe <<
526 default y <<
527 help <<
528 Adds "C" to the ISA subsets that the <<
529 when building Linux, which results i <<
530 Linux binary. <<
531 <<
532 If you don't know what to do here, s <<
533 <<
534 config RISCV_ISA_SVNAPOT <<
535 bool "Svnapot extension support for su <<
536 depends on 64BIT && MMU <<
537 depends on RISCV_ALTERNATIVE <<
538 default y <<
539 help <<
540 Allow kernel to detect the Svnapot I <<
541 time and enable its usage. <<
542 225
543 The Svnapot extension is used to mar !! 226 # clear all implied options (don't want default values for those):
544 of contiguous virtual-to-physical tr !! 227 # Most of these machines have ISA slots; not exactly sure which don't,
545 aligned power-of-2 (NAPOT) granulari !! 228 # and this doesn't activate hordes of code, so do it always.
546 size. When HUGETLBFS is also selecte !! 229 config ISA
547 allocates some memory for each NAPOT !! 230 bool
548 When optimizing for low memory consu <<
549 the Svnapot extension, it may be bet <<
550 <<
551 If you don't know what to do here, s <<
552 <<
553 config RISCV_ISA_SVPBMT <<
554 bool "Svpbmt extension support for sup <<
555 depends on 64BIT && MMU <<
556 depends on RISCV_ALTERNATIVE <<
557 default y 231 default y
558 help 232 help
559 Adds support to dynamically detect !! 233 Find out whether you have ISA slots on your motherboard. ISA is the
560 ISA-extension (Supervisor-mode: pag !! 234 name of a bus system, i.e. the way the CPU talks to the other stuff
561 enable its usage. !! 235 inside your box. Other bus systems are PCI, EISA, MicroChannel
562 !! 236 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
563 The memory type for a page contains !! 237 newer boards don't support it. If you have ISA, say Y, otherwise N.
564 that indicate the cacheability, ide <<
565 properties for access to that page. <<
566 <<
567 The Svpbmt extension is only availa <<
568 238
569 If you don't know what to do here, !! 239 config ISA_DMA_API
570 <<
571 config TOOLCHAIN_HAS_V <<
572 bool 240 bool
573 default y 241 default y
574 depends on !64BIT || $(cc-option,-mabi <<
575 depends on !32BIT || $(cc-option,-mabi <<
576 depends on LLD_VERSION >= 140000 || LD <<
577 depends on AS_HAS_OPTION_ARCH <<
578 <<
579 config RISCV_ISA_V <<
580 bool "VECTOR extension support" <<
581 depends on TOOLCHAIN_HAS_V <<
582 depends on FPU <<
583 select DYNAMIC_SIGFRAME <<
584 default y <<
585 help <<
586 Say N here if you want to disable al <<
587 in the kernel. <<
588 242
589 If you don't know what to do here, s !! 243 config ALPHA_CIA
590 !! 244 bool
591 config RISCV_ISA_V_DEFAULT_ENABLE !! 245 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR
592 bool "Enable userspace Vector by defau <<
593 depends on RISCV_ISA_V <<
594 default y <<
595 help <<
596 Say Y here if you want to enable Vec <<
597 Otherwise, userspace has to make exp <<
598 Vector, or enable it via the sysctl <<
599 <<
600 If you don't know what to do here, s <<
601 <<
602 config RISCV_ISA_V_UCOPY_THRESHOLD <<
603 int "Threshold size for vectorized use <<
604 depends on RISCV_ISA_V <<
605 default 768 <<
606 help <<
607 Prefer using vectorized copy_to_user <<
608 workload size exceeds this value. <<
609 <<
610 config RISCV_ISA_V_PREEMPTIVE <<
611 bool "Run kernel-mode Vector with kern <<
612 depends on PREEMPTION <<
613 depends on RISCV_ISA_V <<
614 default y <<
615 help <<
616 Usually, in-kernel SIMD routines are <<
617 Functions which envoke long running <<
618 vector unit to prevent blocking othe <<
619 <<
620 This config allows kernel to run SIM <<
621 preemption. Enabling this config wil <<
622 consumption due to the allocation of <<
623 <<
624 config RISCV_ISA_ZAWRS <<
625 bool "Zawrs extension support for more <<
626 depends on RISCV_ALTERNATIVE <<
627 default y 246 default y
628 help <<
629 The Zawrs extension defines instruct <<
630 which allow a hart to enter a low-po <<
631 hypervisor while waiting on a store <<
632 use of these instructions in the ker <<
633 detected at boot. <<
634 247
635 If you don't know what to do here, s !! 248 config ALPHA_EV56
>> 249 bool
>> 250 default y if ALPHA_ALCOR || ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_RAWHIDE || ALPHA_SABLE
636 251
637 config TOOLCHAIN_HAS_ZBB !! 252 config ALPHA_T2
638 bool 253 bool
>> 254 depends on ALPHA_SABLE
639 default y 255 default y
640 depends on !64BIT || $(cc-option,-mabi <<
641 depends on !32BIT || $(cc-option,-mabi <<
642 depends on LLD_VERSION >= 150000 || LD <<
643 depends on AS_HAS_OPTION_ARCH <<
644 <<
645 # This symbol indicates that the toolchain sup <<
646 # extensions, including Zvk*, Zvbb, and Zvbc. <<
647 # binutils added all except Zvkb, then added Z <<
648 config TOOLCHAIN_HAS_VECTOR_CRYPTO <<
649 def_bool $(as-instr, .option arch$(com <<
650 depends on AS_HAS_OPTION_ARCH <<
651 256
652 config RISCV_ISA_ZBA !! 257 config ALPHA_PYXIS
653 bool "Zba extension support for bit ma !! 258 bool
>> 259 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
654 default y 260 default y
655 help <<
656 Add support for enabling optimisati <<
657 extension is detected at boot. <<
658 261
659 The Zba extension provides instruct !! 262 config ALPHA_EV6
660 of addresses that index into arrays !! 263 bool
661 !! 264 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
662 If you don't know what to do here, <<
663 <<
664 config RISCV_ISA_ZBB <<
665 bool "Zbb extension support for bit ma <<
666 depends on TOOLCHAIN_HAS_ZBB <<
667 depends on RISCV_ALTERNATIVE <<
668 default y 265 default y
669 help <<
670 Adds support to dynamically detect <<
671 extension (basic bit manipulation) <<
672 <<
673 The Zbb extension provides instruct <<
674 of bit-specific operations (count b <<
675 bitrotation, etc). <<
676 <<
677 If you don't know what to do here, <<
678 266
679 config TOOLCHAIN_HAS_ZBC !! 267 config ALPHA_TSUNAMI
680 bool 268 bool
>> 269 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
681 default y 270 default y
682 depends on !64BIT || $(cc-option,-mabi <<
683 depends on !32BIT || $(cc-option,-mabi <<
684 depends on LLD_VERSION >= 150000 || LD <<
685 depends on AS_HAS_OPTION_ARCH <<
686 <<
687 config RISCV_ISA_ZBC <<
688 bool "Zbc extension support for carry- <<
689 depends on TOOLCHAIN_HAS_ZBC <<
690 depends on MMU <<
691 depends on RISCV_ALTERNATIVE <<
692 default y <<
693 help <<
694 Adds support to dynamically detect <<
695 extension (carry-less multiplicatio <<
696 <<
697 The Zbc extension could accelerate <<
698 calculations. <<
699 271
700 If you don't know what to do here, !! 272 config ALPHA_EV67
701 !! 273 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
702 config RISCV_ISA_ZICBOM !! 274 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
703 bool "Zicbom extension support for non <<
704 depends on MMU <<
705 depends on RISCV_ALTERNATIVE <<
706 default y <<
707 select RISCV_DMA_NONCOHERENT <<
708 select DMA_DIRECT_REMAP <<
709 help 275 help
710 Adds support to dynamically detect !! 276 Is this a machine based on the EV67 core? If in doubt, select N here
711 extension (Cache Block Management O !! 277 and the machine will be treated as an EV6.
712 usage. <<
713 <<
714 The Zicbom extension can be used to <<
715 non-coherent DMA support on devices <<
716 278
717 If you don't know what to do here, !! 279 config ALPHA_MCPCIA
718 !! 280 bool
719 config RISCV_ISA_ZICBOZ !! 281 depends on ALPHA_RAWHIDE
720 bool "Zicboz extension support for fas <<
721 depends on RISCV_ALTERNATIVE <<
722 default y 282 default y
723 help <<
724 Enable the use of the Zicboz extens <<
725 when available. <<
726 283
727 The Zicboz extension is used for fa !! 284 config ALPHA_POLARIS
728 !! 285 bool
729 If you don't know what to do here, !! 286 depends on ALPHA_RX164
730 <<
731 config TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI <<
732 def_bool y <<
733 # https://sourceware.org/git/?p=binuti <<
734 # https://gcc.gnu.org/git/?p=gcc.git;a <<
735 depends on AS_IS_GNU && AS_VERSION >= <<
736 help <<
737 Binutils-2.38 and GCC-12.1.0 bumped <<
738 20191213 version, which moves some i <<
739 the Zicsr and Zifencei extensions. T <<
740 Zicsr and Zifencei when binutils >= <<
741 and Zifencei are supported in binuti <<
742 To make life easier, and avoid forci <<
743 newer ISA spec to version 2.2, relax <<
744 For clang < 17 or GCC < 11.3.0, for <<
745 special treatment, this is dealt wit <<
746 <<
747 config TOOLCHAIN_NEEDS_OLD_ISA_SPEC <<
748 def_bool y <<
749 depends on TOOLCHAIN_NEEDS_EXPLICIT_ZI <<
750 # https://github.com/llvm/llvm-project <<
751 # https://gcc.gnu.org/git/?p=gcc.git;a <<
752 depends on (CC_IS_CLANG && CLANG_VERSI <<
753 help <<
754 Certain versions of clang and GCC do <<
755 -march. This option causes an older <<
756 versions of clang and GCC to be pass <<
757 as passing zicsr and zifencei to -ma <<
758 <<
759 config FPU <<
760 bool "FPU support" <<
761 default y 287 default y
762 help <<
763 Say N here if you want to disable al <<
764 in the kernel. <<
765 <<
766 If you don't know what to do here, s <<
767 288
768 config IRQ_STACKS !! 289 config ALPHA_IRONGATE
769 bool "Independent irq & softirq stacks !! 290 bool
>> 291 depends on ALPHA_NAUTILUS
770 default y 292 default y
771 select HAVE_IRQ_EXIT_ON_IRQ_STACK <<
772 select HAVE_SOFTIRQ_ON_OWN_STACK <<
773 help <<
774 Add independent irq & softirq stacks <<
775 overflows. We may save some memory f <<
776 293
777 config THREAD_SIZE_ORDER !! 294 config GENERIC_HWEIGHT
778 int "Kernel stack size (in power-of-tw !! 295 bool
779 range 0 4 !! 296 default y if !ALPHA_EV67
780 default 1 if 32BIT <<
781 default 2 <<
782 help <<
783 Specify the Pages of thread stack si <<
784 affects irq stack size, which is equ <<
785 297
786 config RISCV_MISALIGNED !! 298 config ALPHA_BROKEN_IRQ_MASK
787 bool 299 bool
788 select SYSCTL_ARCH_UNALIGN_ALLOW !! 300 depends on ALPHA_GENERIC || ALPHA_PC164
789 help !! 301 default y
790 Embed support for emulating misalign <<
791 302
792 choice !! 303 config VGA_HOSE
793 prompt "Unaligned Accesses Support" !! 304 bool
794 default RISCV_PROBE_UNALIGNED_ACCESS !! 305 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
>> 306 default y
795 help 307 help
796 This determines the level of support !! 308 Support VGA on an arbitrary hose; needed for several platforms
797 information is used by the kernel to !! 309 which always have multiple hoses, and whose consoles support it.
798 exposed to user space via the hwprob <<
799 probed at boot by default. <<
800 <<
801 config RISCV_PROBE_UNALIGNED_ACCESS <<
802 bool "Probe for hardware unaligned acc <<
803 select RISCV_MISALIGNED <<
804 help <<
805 During boot, the kernel will run a s <<
806 speed of unaligned accesses. This pr <<
807 the speed of unaligned accesses on t <<
808 memory accesses trap into the kernel <<
809 system, the kernel will emulate the <<
810 UABI. <<
811 <<
812 config RISCV_EMULATED_UNALIGNED_ACCESS <<
813 bool "Emulate unaligned access where s <<
814 select RISCV_MISALIGNED <<
815 help <<
816 If unaligned memory accesses trap in <<
817 supported by the system, the kernel <<
818 accesses to preserve the UABI. When <<
819 unaligned accesses, the unaligned ac <<
820 <<
821 config RISCV_SLOW_UNALIGNED_ACCESS <<
822 bool "Assume the system supports slow <<
823 depends on NONPORTABLE <<
824 help <<
825 Assume that the system supports slow <<
826 kernel and userspace programs may no <<
827 that do not support unaligned memory <<
828 <<
829 config RISCV_EFFICIENT_UNALIGNED_ACCESS <<
830 bool "Assume the system supports fast <<
831 depends on NONPORTABLE <<
832 select DCACHE_WORD_ACCESS if MMU <<
833 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
834 help <<
835 Assume that the system supports fast <<
836 enabled, this option improves the pe <<
837 systems. However, the kernel and use <<
838 slowly, or will not be able to run a <<
839 support efficient unaligned memory a <<
840 <<
841 endchoice <<
842 <<
843 source "arch/riscv/Kconfig.vendor" <<
844 <<
845 endmenu # "Platform type" <<
846 <<
847 menu "Kernel features" <<
848 <<
849 source "kernel/Kconfig.hz" <<
850 310
851 config RISCV_SBI_V01 <<
852 bool "SBI v0.1 support" <<
853 depends on RISCV_SBI <<
854 help <<
855 This config allows kernel to use SBI <<
856 deprecated in future once legacy M-m <<
857 311
858 config RISCV_BOOT_SPINWAIT !! 312 config ALPHA_QEMU
859 bool "Spinwait booting method" !! 313 bool "Run under QEMU emulation"
860 depends on SMP !! 314 depends on !ALPHA_GENERIC
861 default y if RISCV_SBI_V01 || RISCV_M_ <<
862 help 315 help
863 This enables support for booting Lin !! 316 Assume the presence of special features supported by QEMU PALcode
864 spinwait method, all cores randomly !! 317 that reduce the overhead of system emulation.
865 gets chosen via lottery and all othe <<
866 variable. This method cannot support <<
867 scheme. It should be only enabled fo <<
868 on older firmware without SBI HSM ex <<
869 rely on ordered booting via SBI HSM <<
870 dynamically at runtime if the firmwa <<
871 <<
872 Since spinwait is incompatible with <<
873 NR_CPUS be large enough to contain t <<
874 hart to enter Linux. <<
875 318
876 If unsure what to do here, say N. !! 319 Generic kernels will auto-detect QEMU. But when building a
877 !! 320 system-specific kernel, the assumption is that we want to
878 config ARCH_SUPPORTS_KEXEC !! 321 eliminate as many runtime tests as possible.
879 def_bool y <<
880 322
881 config ARCH_SELECTS_KEXEC !! 323 If unsure, say N.
882 def_bool y <<
883 depends on KEXEC <<
884 select HOTPLUG_CPU if SMP <<
885 324
886 config ARCH_SUPPORTS_KEXEC_FILE <<
887 def_bool 64BIT <<
888 325
889 config ARCH_SELECTS_KEXEC_FILE !! 326 config ALPHA_SRM
890 def_bool y !! 327 bool "Use SRM as bootloader" if ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS
891 depends on KEXEC_FILE !! 328 depends on TTY
892 select HAVE_IMA_KEXEC if IMA !! 329 default y if ALPHA_MIKASA || ALPHA_SABLE || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
893 select KEXEC_ELF !! 330 help
>> 331 There are two different types of booting firmware on Alphas: SRM,
>> 332 which is command line driven, and ARC, which uses menus and arrow
>> 333 keys. Details about the Linux/Alpha booting process are contained in
>> 334 the Linux/Alpha FAQ, accessible on the WWW from
>> 335 <http://www.alphalinux.org/>.
>> 336
>> 337 The usual way to load Linux on an Alpha machine is to use MILO
>> 338 (a bootloader that lets you pass command line parameters to the
>> 339 kernel just like lilo does for the x86 architecture) which can be
>> 340 loaded either from ARC or can be installed directly as a permanent
>> 341 firmware replacement from floppy (which requires changing a certain
>> 342 jumper on the motherboard). If you want to do either of these, say N
>> 343 here. If MILO doesn't work on your system (true for Jensen
>> 344 motherboards), you can bypass it altogether and boot Linux directly
>> 345 from an SRM console; say Y here in order to do that. Note that you
>> 346 won't be able to boot from an IDE disk using SRM.
894 347
895 config ARCH_SUPPORTS_KEXEC_PURGATORY !! 348 If unsure, say N.
896 def_bool ARCH_SUPPORTS_KEXEC_FILE <<
897 349
898 config ARCH_SUPPORTS_CRASH_DUMP !! 350 config ARCH_MAY_HAVE_PC_FDC
899 def_bool y 351 def_bool y
900 352
901 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO !! 353 config SMP
902 def_bool CRASH_RESERVE !! 354 bool "Symmetric multi-processing support"
903 !! 355 depends on ALPHA_SABLE || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
904 config COMPAT <<
905 bool "Kernel support for 32-bit U-mode <<
906 default 64BIT <<
907 depends on 64BIT && MMU <<
908 help <<
909 This option enables support for a 32 <<
910 kernel at S-mode. riscv32-specific c <<
911 the user helper functions (vdso), si <<
912 ptrace interface are handled appropr <<
913 <<
914 If you want to execute 32-bit usersp <<
915 <<
916 config PARAVIRT <<
917 bool "Enable paravirtualization code" <<
918 depends on RISCV_SBI <<
919 help <<
920 This changes the kernel so it can mo <<
921 under a hypervisor, potentially impr <<
922 over full virtualization. <<
923 <<
924 config PARAVIRT_TIME_ACCOUNTING <<
925 bool "Paravirtual steal time accountin <<
926 depends on PARAVIRT <<
927 help <<
928 Select this option to enable fine gr <<
929 accounting. Time spent executing oth <<
930 the current vCPU is discounted from <<
931 that, there can be a small performan <<
932 <<
933 If in doubt, say N here. <<
934 <<
935 config RELOCATABLE <<
936 bool "Build a relocatable kernel" <<
937 depends on MMU && 64BIT && !XIP_KERNEL <<
938 select MODULE_SECTIONS if MODULES <<
939 help <<
940 This builds a kernel as a Position I <<
941 which retains all relocation metadat <<
942 kernel binary at runtime to a differ <<
943 address it was linked at. <<
944 Since RISCV uses the RELA relocation <<
945 relocation pass at runtime even if t <<
946 same address it was linked at. <<
947 <<
948 If unsure, say N. <<
949 <<
950 config RANDOMIZE_BASE <<
951 bool "Randomize the address of the ker <<
952 select RELOCATABLE <<
953 depends on MMU && 64BIT && !XIP_KERNEL <<
954 help <<
955 Randomizes the virtual address at wh <<
956 loaded, as a security feature that d <<
957 relying on knowledge of the location <<
958 <<
959 It is the bootloader's job to provid <<
960 random u64 value in /chosen/kaslr-se <<
961 <<
962 When booting via the UEFI stub, it w <<
963 EFI_RNG_PROTOCOL implementation (if <<
964 to the kernel proper. In addition, i <<
965 location of the kernel Image as well <<
966 <<
967 If unsure, say N. <<
968 <<
969 endmenu # "Kernel features" <<
970 <<
971 menu "Boot options" <<
972 <<
973 config CMDLINE <<
974 string "Built-in kernel command line" <<
975 help <<
976 For most platforms, the arguments fo <<
977 are provided at run-time, during boo <<
978 where either no arguments are being <<
979 arguments are insufficient or even i <<
980 <<
981 When that occurs, it is possible to <<
982 line here and choose how the kernel <<
983 <<
984 choice <<
985 prompt "Built-in command line usage" <<
986 depends on CMDLINE != "" <<
987 default CMDLINE_FALLBACK <<
988 help <<
989 Choose how the kernel will handle th <<
990 line. <<
991 <<
992 config CMDLINE_FALLBACK <<
993 bool "Use bootloader kernel arguments <<
994 help <<
995 Use the built-in command line as fal <<
996 during boot. This is the default beh <<
997 <<
998 config CMDLINE_EXTEND <<
999 bool "Extend bootloader kernel argumen <<
1000 help <<
1001 The command-line arguments provided <<
1002 appended to the built-in command li <<
1003 cases where the provided arguments <<
1004 you don't want to or cannot modify <<
1005 <<
1006 config CMDLINE_FORCE <<
1007 bool "Always use the default kernel c <<
1008 help <<
1009 Always use the built-in command lin <<
1010 boot. This is useful in case you ne <<
1011 command line on systems where you d <<
1012 over it. <<
1013 <<
1014 endchoice <<
1015 <<
1016 config EFI_STUB <<
1017 bool <<
1018 <<
1019 config EFI <<
1020 bool "UEFI runtime support" <<
1021 depends on OF && !XIP_KERNEL <<
1022 depends on MMU <<
1023 default y <<
1024 select ARCH_SUPPORTS_ACPI if 64BIT <<
1025 select EFI_GENERIC_STUB <<
1026 select EFI_PARAMS_FROM_FDT <<
1027 select EFI_RUNTIME_WRAPPERS <<
1028 select EFI_STUB <<
1029 select LIBFDT <<
1030 select RISCV_ISA_C <<
1031 select UCS2_STRING <<
1032 help <<
1033 This option provides support for ru <<
1034 by UEFI firmware (such as non-volat <<
1035 clock, and platform reset). A UEFI <<
1036 allow the kernel to be booted as an <<
1037 is only useful on systems that have <<
1038 <<
1039 config DMI <<
1040 bool "Enable support for SMBIOS (DMI) <<
1041 depends on EFI <<
1042 default y <<
1043 help 356 help
1044 This enables SMBIOS/DMI feature for !! 357 This enables support for systems with more than one CPU. If you have
1045 !! 358 a system with only one CPU, say N. If you have a system with more
1046 This option is only useful on syste !! 359 than one CPU, say Y.
1047 However, even with this option, the !! 360
1048 continue to boot on existing non-UE !! 361 If you say N here, the kernel will run on uni- and multiprocessor
1049 !! 362 machines, but will use only one CPU of a multiprocessor machine. If
1050 config CC_HAVE_STACKPROTECTOR_TLS !! 363 you say Y here, the kernel will run on many, but not all,
1051 def_bool $(cc-option,-mstack-protecto !! 364 uniprocessor machines. On a uniprocessor machine, the kernel
1052 !! 365 will run faster if you say N here.
1053 config STACKPROTECTOR_PER_TASK <<
1054 def_bool y <<
1055 depends on !RANDSTRUCT <<
1056 depends on STACKPROTECTOR && CC_HAVE_ <<
1057 <<
1058 config PHYS_RAM_BASE_FIXED <<
1059 bool "Explicitly specified physical R <<
1060 depends on NONPORTABLE <<
1061 default n <<
1062 <<
1063 config PHYS_RAM_BASE <<
1064 hex "Platform Physical RAM address" <<
1065 depends on PHYS_RAM_BASE_FIXED <<
1066 default "0x80000000" <<
1067 help <<
1068 This is the physical address of RAM <<
1069 explicitly specified to run early r <<
1070 from flash to RAM. <<
1071 <<
1072 config XIP_KERNEL <<
1073 bool "Kernel Execute-In-Place from RO <<
1074 depends on MMU && SPARSEMEM && NONPOR <<
1075 # This prevents XIP from being enable <<
1076 # fail to build since XIP doesn't sup <<
1077 depends on !COMPILE_TEST <<
1078 select PHYS_RAM_BASE_FIXED <<
1079 help <<
1080 Execute-In-Place allows the kernel <<
1081 directly addressable by the CPU, su <<
1082 space since the text section of the <<
1083 to RAM. Read-write sections, such <<
1084 are still copied to RAM. The XIP k <<
1085 it has to run directly from flash, <<
1086 store it. The flash address used t <<
1087 and for storing it, is configuratio <<
1088 say Y here, you must know the prope <<
1089 store the kernel image depending on <<
1090 <<
1091 Also note that the make target beco <<
1092 "make zImage" or "make Image". The <<
1093 ROM memory will be arch/riscv/boot/ <<
1094 <<
1095 SPARSEMEM is required because the k <<
1096 flash resident are not backed by me <<
1097 a struct page on those regions will <<
1098 366
1099 If unsure, say N. !! 367 See also the SMP-HOWTO available at
>> 368 <https://www.tldp.org/docs.html#howto>.
1100 369
1101 config XIP_PHYS_ADDR !! 370 If you don't know what to do here, say N.
1102 hex "XIP Kernel Physical Location" <<
1103 depends on XIP_KERNEL <<
1104 default "0x21000000" <<
1105 help <<
1106 This is the physical address in you <<
1107 be linked for and stored to. This <<
1108 own flash usage. <<
1109 371
1110 config RISCV_ISA_FALLBACK !! 372 config NR_CPUS
1111 bool "Permit falling back to parsing !! 373 int "Maximum number of CPUs (2-32)"
1112 default y !! 374 range 2 32
1113 help !! 375 depends on SMP
1114 Parsing the "riscv,isa" devicetree !! 376 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
1115 replaced by a list of explicitly de !! 377 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
1116 with existing platforms, the kernel <<
1117 "riscv,isa" property if the replace <<
1118 <<
1119 Selecting N here will result in a k <<
1120 fallback, unless the commandline "r <<
1121 present. <<
1122 <<
1123 Please see the dt-binding, located <<
1124 Documentation/devicetree/bindings/r <<
1125 on the replacement properties, "ris <<
1126 "riscv,isa-extensions". <<
1127 <<
1128 config BUILTIN_DTB <<
1129 bool "Built-in device tree" <<
1130 depends on OF && NONPORTABLE <<
1131 help 378 help
1132 Build a device tree into the Linux !! 379 MARVEL support can handle a maximum of 32 CPUs, all the others
1133 This option should be selected if n !! 380 with working support have a maximum of 4 CPUs.
1134 If unsure, say N. <<
1135 <<
1136 381
1137 config BUILTIN_DTB_SOURCE !! 382 config ARCH_SPARSEMEM_ENABLE
1138 string "Built-in device tree source" !! 383 bool "Sparse Memory Support"
1139 depends on BUILTIN_DTB <<
1140 help 384 help
1141 DTS file path (without suffix, rela !! 385 Say Y to support efficient handling of discontiguous physical memory,
1142 for the DTS file that will be used !! 386 for systems that have huge holes in the physical address space.
1143 kernel. <<
1144 387
1145 endmenu # "Boot options" !! 388 config ALPHA_WTINT
>> 389 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
>> 390 default y if ALPHA_QEMU
>> 391 default n if ALPHA_EV56
>> 392 default n if !ALPHA_SRM && !ALPHA_GENERIC
>> 393 default y if SMP
>> 394 help
>> 395 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
>> 396 to sleep until the next interrupt. This may reduce the power
>> 397 consumed, and the heat produced by the computer. However, it has
>> 398 the side effect of making the cycle counter unreliable as a timing
>> 399 device across the sleep.
1146 400
1147 config PORTABLE !! 401 For emulation under QEMU, definitely say Y here, as we have other
1148 bool !! 402 mechanisms for measuring time than the cycle counter.
1149 default !NONPORTABLE <<
1150 select EFI <<
1151 select MMU <<
1152 select OF <<
1153 403
1154 config ARCH_PROC_KCORE_TEXT !! 404 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
1155 def_bool y !! 405 MILO, sleep mode is not supported so you might as well say N here.
1156 406
1157 menu "Power management options" !! 407 For SMP systems we cannot use the cycle counter for timing anyway,
>> 408 so you might as well say Y here.
1158 409
1159 source "kernel/power/Kconfig" !! 410 If unsure, say N.
1160 <<
1161 config ARCH_HIBERNATION_POSSIBLE <<
1162 def_bool y <<
1163 411
1164 config ARCH_HIBERNATION_HEADER !! 412 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
1165 def_bool HIBERNATION !! 413 config ALPHA_LARGE_VMALLOC
>> 414 bool
>> 415 help
>> 416 Process creation and other aspects of virtual memory management can
>> 417 be streamlined if we restrict the kernel to one PGD for all vmalloc
>> 418 allocations. This equates to about 8GB.
1166 419
1167 config ARCH_SUSPEND_POSSIBLE !! 420 Under normal circumstances, this is so far and above what is needed
1168 def_bool y !! 421 as to be laughable. However, there are certain applications (such
>> 422 as benchmark-grade in-kernel web serving) that can make use of as
>> 423 much vmalloc space as is available.
1169 424
1170 endmenu # "Power management options" !! 425 Say N unless you know you need gobs and gobs of vmalloc space.
1171 426
1172 menu "CPU Power Management" !! 427 config VERBOSE_MCHECK
>> 428 bool "Verbose Machine Checks"
1173 429
1174 source "drivers/cpuidle/Kconfig" !! 430 config VERBOSE_MCHECK_ON
>> 431 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
>> 432 depends on VERBOSE_MCHECK
>> 433 default 1
>> 434 help
>> 435 This option allows the default printing mode to be set, and then
>> 436 possibly overridden by a boot command argument.
1175 437
1176 source "drivers/cpufreq/Kconfig" !! 438 For example, if one wanted the option of printing verbose
>> 439 machine checks, but wanted the default to be as if verbose
>> 440 machine check printing was turned off, then one would choose
>> 441 the printing mode to be 0. Then, upon reboot, one could add
>> 442 the boot command line "verbose_mcheck=1" to get the normal
>> 443 verbose machine check printing, or "verbose_mcheck=2" to get
>> 444 the maximum information available.
1177 445
1178 endmenu # "CPU Power Management" !! 446 Take the default (1) unless you want more control or more info.
1179 447
1180 source "arch/riscv/kvm/Kconfig" !! 448 choice
>> 449 prompt "Timer interrupt frequency (HZ)?"
>> 450 default HZ_128 if ALPHA_QEMU
>> 451 default HZ_1200 if ALPHA_RAWHIDE
>> 452 default HZ_1024
>> 453 help
>> 454 The frequency at which timer interrupts occur. A high frequency
>> 455 minimizes latency, whereas a low frequency minimizes overhead of
>> 456 process accounting. The later effect is especially significant
>> 457 when being run under QEMU.
>> 458
>> 459 Note that some Alpha hardware cannot change the interrupt frequency
>> 460 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
>> 461
>> 462 config HZ_32
>> 463 bool "32 Hz"
>> 464 config HZ_64
>> 465 bool "64 Hz"
>> 466 config HZ_128
>> 467 bool "128 Hz"
>> 468 config HZ_256
>> 469 bool "256 Hz"
>> 470 config HZ_1024
>> 471 bool "1024 Hz"
>> 472 config HZ_1200
>> 473 bool "1200 Hz"
>> 474 endchoice
1181 475
1182 source "drivers/acpi/Kconfig" !! 476 config HZ
>> 477 int
>> 478 default 32 if HZ_32
>> 479 default 64 if HZ_64
>> 480 default 128 if HZ_128
>> 481 default 256 if HZ_256
>> 482 default 1200 if HZ_1200
>> 483 default 1024
>> 484
>> 485 config SRM_ENV
>> 486 tristate "SRM environment through procfs"
>> 487 depends on PROC_FS
>> 488 help
>> 489 If you enable this option, a subdirectory inside /proc called
>> 490 /proc/srm_environment will give you access to the all important
>> 491 SRM environment variables (those which have a name) and also
>> 492 to all others (by their internal number).
>> 493
>> 494 SRM is something like a BIOS for Alpha machines. There are some
>> 495 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 496 support (hey, that's not SRM!).
>> 497
>> 498 Despite the fact that this driver doesn't work on all Alphas (but
>> 499 only on those which have SRM as their firmware), it's save to
>> 500 build it even if your particular machine doesn't know about SRM
>> 501 (or if you intend to compile a generic kernel). It will simply
>> 502 not create those subdirectory in /proc (and give you some warning,
>> 503 of course).
>> 504
>> 505 This driver is also available as a module and will be called
>> 506 srm_env then.
>> 507
>> 508 endmenu
>> 509
>> 510 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
>> 511 # but we also need it if VGA_HOSE is set
>> 512 config DUMMY_CONSOLE
>> 513 bool
>> 514 depends on VGA_HOSE
>> 515 default y
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