1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # 1 #
3 # For a description of the syntax of this conf 2 # For a description of the syntax of this configuration file,
4 # see Documentation/kbuild/kconfig-language.rs !! 3 # see Documentation/kbuild/kconfig-language.txt.
5 # 4 #
6 !! 5 config ALPHA
7 config 64BIT <<
8 bool <<
9 <<
10 config 32BIT <<
11 bool 6 bool
12 <<
13 config RISCV <<
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 <<
28 select ARCH_HAS_DEBUG_VIRTUAL if MMU <<
29 select ARCH_HAS_DEBUG_VM_PGTABLE <<
30 select ARCH_HAS_DEBUG_WX <<
31 select ARCH_HAS_FAST_MULTIPLIER <<
32 select ARCH_HAS_FORTIFY_SOURCE <<
33 select ARCH_HAS_GCOV_PROFILE_ALL <<
34 select ARCH_HAS_GIGANTIC_PAGE <<
35 select ARCH_HAS_KCOV <<
36 select ARCH_HAS_KERNEL_FPU_SUPPORT if <<
37 select ARCH_HAS_MEMBARRIER_CALLBACKS <<
38 select ARCH_HAS_MEMBARRIER_SYNC_CORE <<
39 select ARCH_HAS_MMIOWB <<
40 select ARCH_HAS_NON_OVERLAPPING_ADDRES <<
41 select ARCH_HAS_PMEM_API <<
42 select ARCH_HAS_PREPARE_SYNC_CORE_CMD <<
43 select ARCH_HAS_PTE_DEVMAP if 64BIT && <<
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 <<
111 select GENERIC_PTDUMP if MMU <<
112 select GENERIC_SCHED_CLOCK <<
113 select GENERIC_SMP_IDLE_THREAD <<
114 select GENERIC_TIME_VSYSCALL if MMU && <<
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 <<
119 select HAVE_ARCH_HUGE_VMALLOC if HAVE_ <<
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 <<
190 select MMU_GATHER_RCU_TABLE_FREE if SM <<
191 select MODULES_USE_ELF_RELA if MODULES <<
192 select OF <<
193 select OF_EARLY_FLATTREE <<
194 select OF_IRQ <<
195 select PCI_DOMAINS_GENERIC if PCI <<
196 select PCI_ECAM if (ACPI && PCI) <<
197 select PCI_MSI if PCI <<
198 select RISCV_ALTERNATIVE if !XIP_KERNE <<
199 select RISCV_APLIC <<
200 select RISCV_IMSIC <<
201 select RISCV_INTC <<
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 <<
238 # https://github.com/llvm/llvm-project/commit/ <<
239 config ARCH_HAS_BROKEN_DWARF5 <<
240 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 7 default y
268 help 8 help
269 Select this option if you want to ru !! 9 The Alpha is a 64-bit general-purpose processor designed and
270 without the assistance of any other !! 10 marketed by the Digital Equipment Corporation of blessed memory,
>> 11 now Hewlett-Packard. The Alpha Linux project has a home page at
>> 12 <http://www.alphalinux.org/>.
271 13
272 # set if we are running in S-mode and can use !! 14 config 64BIT
273 config RISCV_SBI !! 15 def_bool y
274 bool <<
275 depends on !RISCV_M_MODE <<
276 default y <<
277 16
278 config MMU 17 config MMU
279 bool "MMU-based Paged Memory Managemen !! 18 bool
280 default y 19 default y
281 help <<
282 Select if you want MMU-based virtual <<
283 support by paged memory management. <<
284 20
285 config PAGE_OFFSET !! 21 config UID16
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 <<
316 config GENERIC_BUG <<
317 def_bool y <<
318 depends on BUG <<
319 select GENERIC_BUG_RELATIVE_POINTERS i <<
320 <<
321 config GENERIC_BUG_RELATIVE_POINTERS <<
322 bool 22 bool
323 23
324 config GENERIC_CALIBRATE_DELAY !! 24 config RWSEM_GENERIC_SPINLOCK
325 def_bool y !! 25 bool
326 <<
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 <<
336 config ILLEGAL_POINTER_VALUE <<
337 hex <<
338 default 0 if 32BIT <<
339 default 0xdead000000000000 if 64BIT <<
340 <<
341 config PGTABLE_LEVELS <<
342 int <<
343 default 5 if 64BIT <<
344 default 2 <<
345 <<
346 config LOCKDEP_SUPPORT <<
347 def_bool y <<
348 26
349 config RISCV_DMA_NONCOHERENT !! 27 config RWSEM_XCHGADD_ALGORITHM
350 bool 28 bool
351 select ARCH_HAS_DMA_PREP_COHERENT !! 29 default y
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 30
357 config RISCV_NONSTANDARD_CACHE_OPS !! 31 config GENERIC_ISA_DMA
358 bool 32 bool
359 help !! 33 default y
360 This enables function pointer suppor <<
361 systems to handle cache management. <<
362 34
363 config AS_HAS_INSN !! 35 source "init/Kconfig"
364 def_bool $(as-instr,.insn r 51$(comma) <<
365 36
366 config AS_HAS_OPTION_ARCH <<
367 # https://github.com/llvm/llvm-project <<
368 def_bool y <<
369 depends on $(as-instr, .option arch$(c <<
370 37
371 source "arch/riscv/Kconfig.socs" !! 38 menu "System setup"
372 source "arch/riscv/Kconfig.errata" <<
373 39
374 menu "Platform type" !! 40 choice
>> 41 prompt "Alpha system type"
>> 42 default ALPHA_GENERIC
>> 43 ---help---
>> 44 This is the system type of your hardware. A "generic" kernel will
>> 45 run on any supported Alpha system. However, if you configure a
>> 46 kernel for your specific system, it will be faster and smaller.
>> 47
>> 48 To find out what type of Alpha system you have, you may want to
>> 49 check out the Linux/Alpha FAQ, accessible on the WWW from
>> 50 <http://www.alphalinux.org/>. In summary:
>> 51
>> 52 Alcor/Alpha-XLT AS 600
>> 53 Alpha-XL XL-233, XL-266
>> 54 AlphaBook1 Alpha laptop
>> 55 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
>> 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
>> 81
>> 82 If you don't know what to do, choose "generic".
>> 83
>> 84 config ALPHA_GENERIC
>> 85 bool "Generic"
>> 86 help
>> 87 A generic kernel will run on all supported Alpha hardware.
>> 88
>> 89 config ALPHA_ALCOR
>> 90 bool "Alcor/Alpha-XLT"
>> 91 help
>> 92 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
>> 93 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
>> 94 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
>> 95 controller (256-bit memory bus) and a PCI interface. It also does
>> 96 all the work required to support an external Bcache and to maintain
>> 97 memory coherence when a PCI device DMAs into (or out of) memory.
>> 98
>> 99 config ALPHA_XL
>> 100 bool "Alpha-XL"
>> 101 help
>> 102 XL-233 and XL-266-based Alpha systems.
>> 103
>> 104 config ALPHA_BOOK1
>> 105 bool "AlphaBook1"
>> 106 help
>> 107 Dec AlphaBook1/Burns Alpha-based laptops.
>> 108
>> 109 config ALPHA_AVANTI_CH
>> 110 bool "Avanti"
>> 111
>> 112 config ALPHA_CABRIOLET
>> 113 bool "Cabriolet"
>> 114 help
>> 115 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
>> 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.
>> 119
>> 120 config ALPHA_DP264
>> 121 bool "DP264"
>> 122 help
>> 123 Various 21264 systems with the tsunami core logic chipset.
>> 124 API Networks: 264DP, UP2000(+), CS20;
>> 125 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
>> 126
>> 127 config ALPHA_EB164
>> 128 bool "EB164"
>> 129 help
>> 130 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
>> 131 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
>> 132 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
>> 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.
>> 136
>> 137 config ALPHA_EB64P_CH
>> 138 bool "EB64+"
>> 139
>> 140 config ALPHA_EB66
>> 141 bool "EB66"
>> 142 help
>> 143 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
>> 144 identical to EB64+. Baby PC-AT size. Runs from standard PC power
>> 145 supply. The EB66 schematic was published as a marketing poster
>> 146 advertising the 21066 as "the first microprocessor in the world with
>> 147 embedded PCI".
>> 148
>> 149 config ALPHA_EB66P
>> 150 bool "EB66+"
>> 151 help
>> 152 Later variant of the EB66 board.
>> 153
>> 154 config ALPHA_EIGER
>> 155 bool "Eiger"
>> 156 help
>> 157 Apparently an obscure OEM single-board computer based on the
>> 158 Typhoon/Tsunami chipset family. Information on it is scanty.
>> 159
>> 160 config ALPHA_JENSEN
>> 161 bool "Jensen"
>> 162 help
>> 163 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
>> 164 of the first-generation Alpha systems. A number of these systems
>> 165 seem to be available on the second- hand market. The Jensen is a
>> 166 floor-standing tower system which originally used a 150MHz 21064 It
>> 167 used programmable logic to interface a 486 EISA I/O bridge to the
>> 168 CPU.
>> 169
>> 170 config ALPHA_LX164
>> 171 bool "LX164"
>> 172 help
>> 173 A technical overview of this board is available at
>> 174 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
>> 175
>> 176 config ALPHA_LYNX
>> 177 bool "Lynx"
>> 178 help
>> 179 AlphaServer 2100A-based systems.
>> 180
>> 181 config ALPHA_MARVEL
>> 182 bool "Marvel"
>> 183 help
>> 184 AlphaServer ES47 / ES80 / GS1280 based on EV7.
>> 185
>> 186 config ALPHA_MIATA
>> 187 bool "Miata"
>> 188 help
>> 189 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
>> 190 or 600au). There is an Installation HOWTO for this hardware at
>> 191 <http://members.brabant.chello.nl/~s.vandereijk/miata.html>.
>> 192
>> 193 config ALPHA_MIKASA
>> 194 bool "Mikasa"
>> 195 help
>> 196 AlphaServer 1000-based Alpha systems.
>> 197
>> 198 config ALPHA_NAUTILUS
>> 199 bool "Nautilus"
>> 200 help
>> 201 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
375 202
376 config NONPORTABLE !! 203 config ALPHA_NONAME_CH
377 bool "Allow configurations that result !! 204 bool "Noname"
378 help <<
379 RISC-V kernel binaries are compatibl <<
380 whenever possible, but there are som <<
381 satisfied by configurations that res <<
382 not portable between systems. <<
383 205
384 Selecting N does not guarantee kerne !! 206 config ALPHA_NORITAKE
385 systems. Selecting any of the optio !! 207 bool "Noritake"
386 result in kernel binaries that are u !! 208 help
>> 209 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
387 systems. 210 systems.
388 211
389 If unsure, say N. !! 212 config ALPHA_PC164
>> 213 bool "PC164"
390 214
391 choice !! 215 config ALPHA_P2K
392 prompt "Base ISA" !! 216 bool "Platform2000"
393 default ARCH_RV64I !! 217
>> 218 config ALPHA_RAWHIDE
>> 219 bool "Rawhide"
394 help 220 help
395 This selects the base ISA that this !! 221 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
396 the target platform. !! 222 See HOWTO at
>> 223 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
397 224
398 config ARCH_RV32I !! 225 config ALPHA_RUFFIAN
399 bool "RV32I" !! 226 bool "Ruffian"
400 depends on NONPORTABLE !! 227 help
401 select 32BIT !! 228 Samsung APC164UX. There is a page on known problems and workarounds
402 select GENERIC_LIB_ASHLDI3 !! 229 at <http://www.alphalinux.org/faq/FAQ-11.html>.
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 <<
412 230
413 endchoice !! 231 config ALPHA_RX164
>> 232 bool "RX164"
414 233
415 # We must be able to map all physical memory i !! 234 config ALPHA_SX164
416 # is still a bit more efficient when generatin !! 235 bool "SX164"
417 # such that it can only map 2GiB of memory. <<
418 choice <<
419 prompt "Kernel Code Model" <<
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 <<
429 config MODULE_SECTIONS <<
430 bool <<
431 select HAVE_MOD_ARCH_SPECIFIC <<
432 236
433 config SMP !! 237 config ALPHA_SABLE
434 bool "Symmetric Multi-Processing" !! 238 bool "Sable"
435 help 239 help
436 This enables support for systems wit !! 240 Digital AlphaServer 2000 and 2100-based systems.
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. <<
443 241
444 If you don't know what to do here, s !! 242 config ALPHA_SHARK
>> 243 bool "Shark"
445 244
446 config SCHED_MC !! 245 config ALPHA_TAKARA
447 bool "Multi-core scheduler support" !! 246 bool "Takara"
448 depends on SMP <<
449 help 247 help
450 Multi-core scheduler support improve !! 248 Alpha 11164-based OEM single-board computer.
451 making when dealing with multi-core <<
452 increased overhead in some places. I <<
453 249
454 config NR_CPUS !! 250 config ALPHA_TITAN
455 int "Maximum number of CPUs (2-512)" !! 251 bool "Titan"
456 depends on SMP <<
457 range 2 512 if !RISCV_SBI_V01 <<
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 <<
463 config HOTPLUG_CPU <<
464 bool "Support for hot-pluggable CPUs" <<
465 depends on SMP <<
466 select GENERIC_IRQ_MIGRATION <<
467 help 252 help
>> 253 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
468 254
469 Say Y here to experiment with turnin !! 255 config ALPHA_WILDFIRE
470 can be controlled through /sys/devic !! 256 bool "Wildfire"
471 !! 257 help
472 Say N if you want to disable CPU hot !! 258 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
473 <<
474 choice <<
475 prompt "CPU Tuning" <<
476 default TUNE_GENERIC <<
477 <<
478 config TUNE_GENERIC <<
479 bool "generic" <<
480 259
481 endchoice 260 endchoice
482 261
483 # Common NUMA Features !! 262 # clear all implied options (don't want default values for those):
484 config NUMA !! 263 # Most of these machines have ISA slots; not exactly sure which don't,
485 bool "NUMA Memory Allocation and Sched !! 264 # and this doesn't activate hordes of code, so do it always.
486 depends on SMP && MMU !! 265 config ISA
487 select ARCH_SUPPORTS_NUMA_BALANCING !! 266 bool
488 select GENERIC_ARCH_NUMA !! 267 default y
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 268 help
495 Enable NUMA (Non-Uniform Memory Acce !! 269 Find out whether you have ISA slots on your motherboard. ISA is the
496 !! 270 name of a bus system, i.e. the way the CPU talks to the other stuff
497 The kernel will try to allocate memo !! 271 inside your box. Other bus systems are PCI, EISA, MicroChannel
498 local memory of the CPU and add some !! 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.
499 274
500 config NODES_SHIFT !! 275 config PCI
501 int "Maximum NUMA Nodes (as a power of !! 276 bool
502 range 1 10 !! 277 depends on !ALPHA_JENSEN
503 default "2" !! 278 default y
504 depends on NUMA <<
505 help 279 help
506 Specify the maximum number of NUMA N !! 280 Find out whether you have a PCI motherboard. PCI is the name of a
507 system. Increases memory reserved t !! 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.
>> 284
>> 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.
508 289
509 config RISCV_ALTERNATIVE !! 290 config PCI_DOMAINS
510 bool 291 bool
511 depends on !XIP_KERNEL !! 292 default y
512 help <<
513 This Kconfig allows the kernel to au <<
514 erratum or cpufeature required by th <<
515 time. The code patching overhead is <<
516 once at boot and once on each module <<
517 293
518 config RISCV_ALTERNATIVE_EARLY !! 294 config ALPHA_CORE_AGP
519 bool 295 bool
520 depends on RISCV_ALTERNATIVE !! 296 depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL
521 help !! 297 default y
522 Allows early patching of the kernel <<
523 298
524 config RISCV_ISA_C !! 299 config ALPHA_NONAME
525 bool "Emit compressed instructions whe !! 300 bool
>> 301 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
526 default y 302 default y
527 help 303 help
528 Adds "C" to the ISA subsets that the !! 304 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
529 when building Linux, which results i !! 305 UDB). This design was produced by Digital's Technical OEM (TOEM)
530 Linux binary. !! 306 group. It uses the 21066 processor running at 166MHz or 233MHz. It
>> 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.
531 311
532 If you don't know what to do here, s !! 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
533 316
534 config RISCV_ISA_SVNAPOT !! 317 config ALPHA_LCA
535 bool "Svnapot extension support for su !! 318 bool
536 depends on 64BIT && MMU !! 319 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
537 depends on RISCV_ALTERNATIVE <<
538 default y 320 default y
539 help <<
540 Allow kernel to detect the Svnapot I <<
541 time and enable its usage. <<
542 <<
543 The Svnapot extension is used to mar <<
544 of contiguous virtual-to-physical tr <<
545 aligned power-of-2 (NAPOT) granulari <<
546 size. When HUGETLBFS is also selecte <<
547 allocates some memory for each NAPOT <<
548 When optimizing for low memory consu <<
549 the Svnapot extension, it may be bet <<
550 321
551 If you don't know what to do here, s !! 322 config ALPHA_APECS
>> 323 bool
>> 324 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
>> 325 default y
552 326
553 config RISCV_ISA_SVPBMT !! 327 config ALPHA_EB64P
554 bool "Svpbmt extension support for sup !! 328 bool
555 depends on 64BIT && MMU !! 329 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
556 depends on RISCV_ALTERNATIVE <<
557 default y 330 default y
558 help 331 help
559 Adds support to dynamically detect !! 332 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
560 ISA-extension (Supervisor-mode: pag !! 333 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
561 enable its usage. !! 334 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
562 !! 335 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
563 The memory type for a page contains !! 336 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
564 that indicate the cacheability, ide !! 337 Runs from standard PC power supply.
565 properties for access to that page. <<
566 338
567 The Svpbmt extension is only availa !! 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
568 342
569 If you don't know what to do here, !! 343 config ALPHA_EV4
>> 344 bool
>> 345 default y if ALPHA_LYNX && !ALPHA_EV5
570 346
571 config TOOLCHAIN_HAS_V !! 347 config ALPHA_CIA
572 bool 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
573 default y 350 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 <<
578 351
579 config RISCV_ISA_V !! 352 config ALPHA_EV56
580 bool "VECTOR extension support" !! 353 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
581 depends on TOOLCHAIN_HAS_V !! 354 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
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. <<
588 355
589 If you don't know what to do here, s !! 356 config ALPHA_EV56
>> 357 prompt "EV56 CPU (speed >= 333MHz)?"
>> 358 depends on ALPHA_NORITAKE && ALPHA_PRIMO
590 359
591 config RISCV_ISA_V_DEFAULT_ENABLE !! 360 config ALPHA_EV56
592 bool "Enable userspace Vector by defau !! 361 prompt "EV56 CPU (speed >= 400MHz)?"
593 depends on RISCV_ISA_V !! 362 depends on ALPHA_RAWHIDE
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 <<
599 363
600 If you don't know what to do here, s !! 364 config ALPHA_PRIMO
>> 365 bool "EV5 CPU daughtercard (model 5/xxx)?"
>> 366 depends on ALPHA_NORITAKE || ALPHA_MIKASA
>> 367 help
>> 368 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
601 369
602 config RISCV_ISA_V_UCOPY_THRESHOLD !! 370 config ALPHA_GAMMA
603 int "Threshold size for vectorized use !! 371 bool "EV5 CPU(s) (model 5/xxx)?"
604 depends on RISCV_ISA_V !! 372 depends on ALPHA_SABLE
605 default 768 <<
606 help 373 help
607 Prefer using vectorized copy_to_user !! 374 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
608 workload size exceeds this value. <<
609 375
610 config RISCV_ISA_V_PREEMPTIVE !! 376 config ALPHA_GAMMA
611 bool "Run kernel-mode Vector with kern !! 377 bool
612 depends on PREEMPTION !! 378 depends on ALPHA_LYNX
613 depends on RISCV_ISA_V <<
614 default y 379 default y
615 help <<
616 Usually, in-kernel SIMD routines are <<
617 Functions which envoke long running <<
618 vector unit to prevent blocking othe <<
619 380
620 This config allows kernel to run SIM !! 381 config ALPHA_T2
621 preemption. Enabling this config wil !! 382 bool
622 consumption due to the allocation of !! 383 depends on ALPHA_SABLE || ALPHA_LYNX
>> 384 default y
623 385
624 config RISCV_ISA_ZAWRS !! 386 config ALPHA_PYXIS
625 bool "Zawrs extension support for more !! 387 bool
626 depends on RISCV_ALTERNATIVE !! 388 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
627 default y 389 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. <<
634 390
635 If you don't know what to do here, s !! 391 config ALPHA_EV6
>> 392 bool
>> 393 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
>> 394 default y
636 395
637 config TOOLCHAIN_HAS_ZBB !! 396 config ALPHA_TSUNAMI
638 bool 397 bool
>> 398 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
639 default y 399 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 <<
644 400
645 # This symbol indicates that the toolchain sup !! 401 config ALPHA_EV67
646 # extensions, including Zvk*, Zvbb, and Zvbc. !! 402 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
647 # binutils added all except Zvkb, then added Z !! 403 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
648 config TOOLCHAIN_HAS_VECTOR_CRYPTO !! 404 help
649 def_bool $(as-instr, .option arch$(com !! 405 Is this a machine based on the EV67 core? If in doubt, select N here
650 depends on AS_HAS_OPTION_ARCH !! 406 and the machine will be treated as an EV6.
651 407
652 config RISCV_ISA_ZBA !! 408 config ALPHA_EV7
653 bool "Zba extension support for bit ma !! 409 bool
>> 410 depends on ALPHA_MARVEL
654 default y 411 default y
655 help <<
656 Add support for enabling optimisati <<
657 extension is detected at boot. <<
658 412
659 The Zba extension provides instruct !! 413 config ALPHA_MCPCIA
660 of addresses that index into arrays !! 414 bool
>> 415 depends on ALPHA_RAWHIDE
>> 416 default y
>> 417
>> 418 config ALPHA_POLARIS
>> 419 bool
>> 420 depends on ALPHA_RX164
>> 421 default y
661 422
662 If you don't know what to do here, !! 423 config ALPHA_IRONGATE
>> 424 bool
>> 425 depends on ALPHA_NAUTILUS
>> 426 default y
663 427
664 config RISCV_ISA_ZBB !! 428 config ALPHA_AVANTI
665 bool "Zbb extension support for bit ma !! 429 bool
666 depends on TOOLCHAIN_HAS_ZBB !! 430 depends on ALPHA_XL || ALPHA_AVANTI_CH
667 depends on RISCV_ALTERNATIVE <<
668 default y 431 default y
669 help 432 help
670 Adds support to dynamically detect !! 433 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
671 extension (basic bit manipulation) !! 434 Alphas. Info at
>> 435 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
>> 436
>> 437 config ALPHA_BROKEN_IRQ_MASK
>> 438 bool
>> 439 depends on ALPHA_GENERIC || ALPHA_PC164
>> 440 default y
>> 441
>> 442 config ALPHA_SRM
>> 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/>.
672 451
673 The Zbb extension provides instruct !! 452 The usual way to load Linux on an Alpha machine is to use MILO
674 of bit-specific operations (count b !! 453 (a bootloader that lets you pass command line parameters to the
675 bitrotation, etc). !! 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.
676 462
677 If you don't know what to do here, !! 463 If unsure, say N.
678 464
679 config TOOLCHAIN_HAS_ZBC !! 465 config EARLY_PRINTK
680 bool 466 bool
>> 467 depends on ALPHA_GENERIC || ALPHA_SRM
681 default y 468 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 <<
686 469
687 config RISCV_ISA_ZBC !! 470 config EISA
688 bool "Zbc extension support for carry- !! 471 bool
689 depends on TOOLCHAIN_HAS_ZBC !! 472 depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
690 depends on MMU <<
691 depends on RISCV_ALTERNATIVE <<
692 default y 473 default y
693 help <<
694 Adds support to dynamically detect <<
695 extension (carry-less multiplicatio <<
696 474
697 The Zbc extension could accelerate !! 475 config SMP
698 calculations. !! 476 bool "Symmetric multi-processing support"
>> 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>.
699 502
700 If you don't know what to do here, !! 503 If you don't know what to do here, say N.
701 504
702 config RISCV_ISA_ZICBOM !! 505 config HAVE_DEC_LOCK
703 bool "Zicbom extension support for non !! 506 bool
704 depends on MMU !! 507 depends on SMP
705 depends on RISCV_ALTERNATIVE <<
706 default y 508 default y
707 select RISCV_DMA_NONCOHERENT <<
708 select DMA_DIRECT_REMAP <<
709 help <<
710 Adds support to dynamically detect <<
711 extension (Cache Block Management O <<
712 usage. <<
713 509
714 The Zicbom extension can be used to !! 510 config NR_CPUS
715 non-coherent DMA support on devices !! 511 int "Maximum number of CPUs (2-64)"
>> 512 depends on SMP
>> 513 default "64"
716 514
717 If you don't know what to do here, !! 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.
718 523
719 config RISCV_ISA_ZICBOZ !! 524 config NUMA
720 bool "Zicboz extension support for fas !! 525 bool "NUMA Support (EXPERIMENTAL)"
721 depends on RISCV_ALTERNATIVE !! 526 depends on DISCONTIGMEM
722 default y <<
723 help 527 help
724 Enable the use of the Zicboz extens !! 528 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
725 when available. !! 529 Access). This option is for configuring high-end multiprocessor
>> 530 server machines. If in doubt, say N.
726 531
727 The Zicboz extension is used for fa !! 532 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
>> 533 config ALPHA_LARGE_VMALLOC
>> 534 bool
>> 535 ---help---
>> 536 Process creation and other aspects of virtual memory management can
>> 537 be streamlined if we restrict the kernel to one PGD for all vmalloc
>> 538 allocations. This equates to about 8GB.
728 539
729 If you don't know what to do here, !! 540 Under normal circumstances, this is so far and above what is needed
>> 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.
730 544
731 config TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI !! 545 Say N unless you know you need gobs and gobs of vmalloc space.
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 <<
746 546
747 config TOOLCHAIN_NEEDS_OLD_ISA_SPEC !! 547 config VERBOSE_MCHECK
748 def_bool y !! 548 bool "Verbose Machine Checks"
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 <<
758 549
759 config FPU !! 550 config VERBOSE_MCHECK_ON
760 bool "FPU support" !! 551 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
761 default y !! 552 depends on VERBOSE_MCHECK
762 help !! 553 default 1
763 Say N here if you want to disable al !! 554 ---help---
764 in the kernel. !! 555 This option allows the default printing mode to be set, and then
>> 556 possibly overridden by a boot command argument.
765 557
766 If you don't know what to do here, s !! 558 For example, if one wanted the option of printing verbose
>> 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.
767 565
768 config IRQ_STACKS !! 566 Take the default (1) unless you want more control or more info.
769 bool "Independent irq & softirq stacks <<
770 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 <<
776 567
777 config THREAD_SIZE_ORDER !! 568 source "drivers/pci/Kconfig"
778 int "Kernel stack size (in power-of-tw !! 569 source "drivers/eisa/Kconfig"
779 range 0 4 <<
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 <<
785 570
786 config RISCV_MISALIGNED !! 571 config HOTPLUG
787 bool !! 572 bool "Support for hot-pluggable devices"
788 select SYSCTL_ARCH_UNALIGN_ALLOW !! 573 ---help---
789 help !! 574 Say Y here if you want to plug devices into your computer while
790 Embed support for emulating misalign !! 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.
791 577
792 choice !! 578 One well known example of this is PCMCIA- or PC-cards, credit-card
793 prompt "Unaligned Accesses Support" !! 579 size devices such as network cards, modems or hard drives which are
794 default RISCV_PROBE_UNALIGNED_ACCESS !! 580 plugged into slots found on all modern laptop computers. Another
795 help !! 581 example, used on modern desktops as well as laptops, is USB.
796 This determines the level of support <<
797 information is used by the kernel to <<
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 <<
840 582
841 endchoice !! 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.
842 588
843 source "arch/riscv/Kconfig.vendor" !! 589 source "drivers/pcmcia/Kconfig"
844 590
845 endmenu # "Platform type" !! 591 config SRM_ENV
>> 592 tristate "SRM environment through procfs"
>> 593 depends on PROC_FS
>> 594 ---help---
>> 595 If you enable this option, a subdirectory inside /proc called
>> 596 /proc/srm_environment will give you access to the all important
>> 597 SRM environment variables (those which have a name) and also
>> 598 to all others (by their internal number).
846 599
847 menu "Kernel features" !! 600 SRM is something like a BIOS for Alpha machines. There are some
>> 601 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 602 support (hey, that's not SRM!).
848 603
849 source "kernel/Kconfig.hz" !! 604 Despite the fact that this driver doesn't work on all Alphas (but
>> 605 only on those which have SRM as their firmware), it's save to
>> 606 build it even if your particular machine doesn't know about SRM
>> 607 (or if you intend to compile a generic kernel). It will simply
>> 608 not create those subdirectory in /proc (and give you some warning,
>> 609 of course).
850 610
851 config RISCV_SBI_V01 !! 611 This driver is also available as a module and will be called
852 bool "SBI v0.1 support" !! 612 srm_env then.
853 depends on RISCV_SBI <<
854 help <<
855 This config allows kernel to use SBI <<
856 deprecated in future once legacy M-m <<
857 613
858 config RISCV_BOOT_SPINWAIT !! 614 source "fs/Kconfig.binfmt"
859 bool "Spinwait booting method" <<
860 depends on SMP <<
861 default y if RISCV_SBI_V01 || RISCV_M_ <<
862 help <<
863 This enables support for booting Lin <<
864 spinwait method, all cores randomly <<
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. <<
875 615
876 If unsure what to do here, say N. !! 616 source "drivers/parport/Kconfig"
877 617
878 config ARCH_SUPPORTS_KEXEC !! 618 endmenu
879 def_bool y <<
880 619
881 config ARCH_SELECTS_KEXEC !! 620 source "drivers/base/Kconfig"
882 def_bool y <<
883 depends on KEXEC <<
884 select HOTPLUG_CPU if SMP <<
885 621
886 config ARCH_SUPPORTS_KEXEC_FILE !! 622 source "drivers/mtd/Kconfig"
887 def_bool 64BIT <<
888 623
889 config ARCH_SELECTS_KEXEC_FILE !! 624 source "drivers/pnp/Kconfig"
890 def_bool y <<
891 depends on KEXEC_FILE <<
892 select HAVE_IMA_KEXEC if IMA <<
893 select KEXEC_ELF <<
894 625
895 config ARCH_SUPPORTS_KEXEC_PURGATORY !! 626 source "drivers/block/Kconfig"
896 def_bool ARCH_SUPPORTS_KEXEC_FILE <<
897 627
898 config ARCH_SUPPORTS_CRASH_DUMP !! 628 source "drivers/md/Kconfig"
899 def_bool y <<
900 629
901 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO !! 630 source "drivers/ide/Kconfig"
902 def_bool CRASH_RESERVE <<
903 631
904 config COMPAT !! 632 source "drivers/scsi/Kconfig"
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 <<
980 633
981 When that occurs, it is possible to !! 634 if PCI
982 line here and choose how the kernel !! 635 source "drivers/message/fusion/Kconfig"
>> 636 endif
983 637
984 choice !! 638 source "drivers/ieee1394/Kconfig"
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 639
1014 endchoice !! 640 source "net/Kconfig"
1015 641
1016 config EFI_STUB !! 642 source "drivers/isdn/Kconfig"
1017 bool <<
1018 643
1019 config EFI !! 644 source "drivers/cdrom/Kconfig"
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 645
1039 config DMI !! 646 source "drivers/input/Kconfig"
1040 bool "Enable support for SMBIOS (DMI) <<
1041 depends on EFI <<
1042 default y <<
1043 help <<
1044 This enables SMBIOS/DMI feature for <<
1045 647
1046 This option is only useful on syste !! 648 source "drivers/char/Kconfig"
1047 However, even with this option, the <<
1048 continue to boot on existing non-UE <<
1049 649
1050 config CC_HAVE_STACKPROTECTOR_TLS !! 650 #source drivers/misc/Config.in
1051 def_bool $(cc-option,-mstack-protecto !! 651 source "drivers/media/Kconfig"
1052 652
1053 config STACKPROTECTOR_PER_TASK !! 653 source "fs/Kconfig"
1054 def_bool y <<
1055 depends on !RANDSTRUCT <<
1056 depends on STACKPROTECTOR && CC_HAVE_ <<
1057 654
1058 config PHYS_RAM_BASE_FIXED !! 655 source "drivers/video/Kconfig"
1059 bool "Explicitly specified physical R <<
1060 depends on NONPORTABLE <<
1061 default n <<
1062 656
1063 config PHYS_RAM_BASE !! 657 source "sound/Kconfig"
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 658
1099 If unsure, say N. !! 659 source "drivers/usb/Kconfig"
1100 660
1101 config XIP_PHYS_ADDR !! 661 source "arch/alpha/oprofile/Kconfig"
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 <<
1110 config RISCV_ISA_FALLBACK <<
1111 bool "Permit falling back to parsing <<
1112 default y <<
1113 help <<
1114 Parsing the "riscv,isa" devicetree <<
1115 replaced by a list of explicitly de <<
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 <<
1132 Build a device tree into the Linux <<
1133 This option should be selected if n <<
1134 If unsure, say N. <<
1135 662
>> 663 menu "Kernel hacking"
1136 664
1137 config BUILTIN_DTB_SOURCE !! 665 config ALPHA_LEGACY_START_ADDRESS
1138 string "Built-in device tree source" !! 666 bool "Legacy kernel start address"
1139 depends on BUILTIN_DTB !! 667 depends on ALPHA_GENERIC
1140 help !! 668 default n
1141 DTS file path (without suffix, rela !! 669 ---help---
1142 for the DTS file that will be used !! 670 The 2.4 kernel changed the kernel start address from 0x310000
1143 kernel. !! 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.
1144 674
1145 endmenu # "Boot options" !! 675 If you're using aboot 0.7 or later, the bootloader will examine the
>> 676 ELF headers to determine where to transfer control. Unfortunately,
>> 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.
1146 680
1147 config PORTABLE !! 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.
>> 683
>> 684 config ALPHA_LEGACY_START_ADDRESS
1148 bool 685 bool
1149 default !NONPORTABLE !! 686 depends on !ALPHA_GENERIC && !ALPHA_TITAN && !ALPHA_MARVEL && !ALPHA_WILDFIRE
1150 select EFI !! 687 default y
1151 select MMU <<
1152 select OF <<
1153 688
1154 config ARCH_PROC_KCORE_TEXT !! 689 config DEBUG_KERNEL
1155 def_bool y !! 690 bool "Kernel debugging"
>> 691 help
>> 692 Say Y here if you are developing drivers or trying to debug and
>> 693 identify kernel problems.
1156 694
1157 menu "Power management options" !! 695 config MATHEMU
>> 696 tristate "Kernel FP software completion" if DEBUG_KERNEL
>> 697 default y if !DEBUG_KERNEL
>> 698 help
>> 699 This option is required for IEEE compliant floating point arithmetic
>> 700 on the Alpha. The only time you would ever not say Y is to say M in
>> 701 order to debug the code. Say Y unless you know what you are doing.
1158 702
1159 source "kernel/power/Kconfig" !! 703 config DEBUG_SLAB
>> 704 bool "Debug memory allocations"
>> 705 depends on DEBUG_KERNEL
>> 706 help
>> 707 Say Y here to have the kernel do limited verification on memory
>> 708 allocation as well as poisoning memory on free to catch use of freed
>> 709 memory.
1160 710
1161 config ARCH_HIBERNATION_POSSIBLE !! 711 config MAGIC_SYSRQ
1162 def_bool y !! 712 bool "Magic SysRq key"
>> 713 depends on DEBUG_KERNEL
>> 714 help
>> 715 If you say Y here, you will have some control over the system even
>> 716 if the system crashes for example during kernel debugging (e.g., you
>> 717 will be able to flush the buffer cache to disk, reboot the system
>> 718 immediately or dump some status information). This is accomplished
>> 719 by pressing various keys while holding SysRq (Alt+PrintScreen). It
>> 720 also works on a serial console (on PC hardware at least), if you
>> 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.
1163 724
1164 config ARCH_HIBERNATION_HEADER !! 725 config DEBUG_SPINLOCK
1165 def_bool HIBERNATION !! 726 bool "Spinlock debugging"
>> 727 depends on DEBUG_KERNEL
>> 728 help
>> 729 Say Y here and build SMP to catch missing spinlock initialization
>> 730 and certain other kinds of spinlock errors commonly made. This is
>> 731 best used in conjunction with the NMI watchdog so that spinlock
>> 732 deadlocks are also debuggable.
1166 733
1167 config ARCH_SUSPEND_POSSIBLE !! 734 config DEBUG_RWLOCK
1168 def_bool y !! 735 bool "Read-write spinlock debugging"
>> 736 depends on DEBUG_KERNEL
>> 737 help
>> 738 If you say Y here then read-write lock processing will count how many
>> 739 times it has tried to get the lock and issue an error message after
>> 740 too many attempts. If you suspect a rwlock problem or a kernel
>> 741 hacker asks for this option then say Y. Otherwise say N.
1169 742
1170 endmenu # "Power management options" !! 743 config DEBUG_SEMAPHORE
>> 744 bool "Semaphore debugging"
>> 745 depends on DEBUG_KERNEL
>> 746 help
>> 747 If you say Y here then semaphore processing will issue lots of
>> 748 verbose debugging messages. If you suspect a semaphore problem or a
>> 749 kernel hacker asks for this option then say Y. Otherwise say N.
1171 750
1172 menu "CPU Power Management" !! 751 config DEBUG_INFO
>> 752 bool "Compile the kernel with debug info"
>> 753 depends on DEBUG_KERNEL
>> 754 help
>> 755 If you say Y here the resulting kernel image will include
>> 756 debugging info resulting in a larger kernel image.
>> 757 Say Y here only if you plan to use gdb to debug the kernel.
>> 758 If you don't debug the kernel, you can say N.
1173 759
1174 source "drivers/cpuidle/Kconfig" !! 760 endmenu
1175 761
1176 source "drivers/cpufreq/Kconfig" !! 762 source "security/Kconfig"
1177 763
1178 endmenu # "CPU Power Management" !! 764 source "crypto/Kconfig"
1179 765
1180 source "arch/riscv/kvm/Kconfig" !! 766 source "lib/Kconfig"
1181 767
1182 source "drivers/acpi/Kconfig" <<
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