1 # SPDX-License-Identifier: GPL-2.0 !! 1 # SPDX-License-Identifier: GPL-2.0-only
2 config LOONGARCH !! 2 config 64BIT
>> 3 bool "64-bit kernel" if "$(ARCH)" = "sparc"
>> 4 default "$(ARCH)" = "sparc64"
>> 5 help
>> 6 SPARC is a family of RISC microprocessors designed and marketed by
>> 7 Sun Microsystems, incorporated. They are very widely found in Sun
>> 8 workstations and clones.
>> 9
>> 10 Say yes to build a 64-bit kernel - formerly known as sparc64
>> 11 Say no to build a 32-bit kernel - formerly known as sparc
>> 12
>> 13 config SPARC
3 bool 14 bool
4 default y 15 default y
5 select ACPI !! 16 select ARCH_MIGHT_HAVE_PC_PARPORT if SPARC64 && PCI
6 select ACPI_GENERIC_GSI if ACPI <<
7 select ACPI_MCFG if ACPI <<
8 select ACPI_HOTPLUG_CPU if ACPI_PROCES <<
9 select ACPI_PPTT if ACPI <<
10 select ACPI_SYSTEM_POWER_STATES_SUPPOR <<
11 select ARCH_BINFMT_ELF_STATE <<
12 select ARCH_DISABLE_KASAN_INLINE <<
13 select ARCH_ENABLE_MEMORY_HOTPLUG <<
14 select ARCH_ENABLE_MEMORY_HOTREMOVE <<
15 select ARCH_ENABLE_THP_MIGRATION if TR <<
16 select ARCH_HAS_ACPI_TABLE_UPGRADE <<
17 select ARCH_HAS_CPU_FINALIZE_INIT <<
18 select ARCH_HAS_CURRENT_STACK_POINTER <<
19 select ARCH_HAS_DEBUG_VM_PGTABLE <<
20 select ARCH_HAS_FAST_MULTIPLIER <<
21 select ARCH_HAS_FORTIFY_SOURCE <<
22 select ARCH_HAS_KCOV <<
23 select ARCH_HAS_KERNEL_FPU_SUPPORT if <<
24 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS <<
25 select ARCH_HAS_NON_OVERLAPPING_ADDRES <<
26 select ARCH_HAS_PTE_DEVMAP <<
27 select ARCH_HAS_PTE_SPECIAL <<
28 select ARCH_HAS_SET_MEMORY <<
29 select ARCH_HAS_SET_DIRECT_MAP <<
30 select ARCH_HAS_TICK_BROADCAST if GENE <<
31 select ARCH_INLINE_READ_LOCK if !PREEM <<
32 select ARCH_INLINE_READ_LOCK_BH if !PR <<
33 select ARCH_INLINE_READ_LOCK_IRQ if !P <<
34 select ARCH_INLINE_READ_LOCK_IRQSAVE i <<
35 select ARCH_INLINE_READ_UNLOCK if !PRE <<
36 select ARCH_INLINE_READ_UNLOCK_BH if ! <<
37 select ARCH_INLINE_READ_UNLOCK_IRQ if <<
38 select ARCH_INLINE_READ_UNLOCK_IRQREST <<
39 select ARCH_INLINE_WRITE_LOCK if !PREE <<
40 select ARCH_INLINE_WRITE_LOCK_BH if !P <<
41 select ARCH_INLINE_WRITE_LOCK_IRQ if ! <<
42 select ARCH_INLINE_WRITE_LOCK_IRQSAVE <<
43 select ARCH_INLINE_WRITE_UNLOCK if !PR <<
44 select ARCH_INLINE_WRITE_UNLOCK_BH if <<
45 select ARCH_INLINE_WRITE_UNLOCK_IRQ if <<
46 select ARCH_INLINE_WRITE_UNLOCK_IRQRES <<
47 select ARCH_INLINE_SPIN_TRYLOCK if !PR <<
48 select ARCH_INLINE_SPIN_TRYLOCK_BH if <<
49 select ARCH_INLINE_SPIN_LOCK if !PREEM <<
50 select ARCH_INLINE_SPIN_LOCK_BH if !PR <<
51 select ARCH_INLINE_SPIN_LOCK_IRQ if !P <<
52 select ARCH_INLINE_SPIN_LOCK_IRQSAVE i <<
53 select ARCH_INLINE_SPIN_UNLOCK if !PRE <<
54 select ARCH_INLINE_SPIN_UNLOCK_BH if ! <<
55 select ARCH_INLINE_SPIN_UNLOCK_IRQ if <<
56 select ARCH_INLINE_SPIN_UNLOCK_IRQREST <<
57 select ARCH_KEEP_MEMBLOCK <<
58 select ARCH_MIGHT_HAVE_PC_PARPORT <<
59 select ARCH_MIGHT_HAVE_PC_SERIO 17 select ARCH_MIGHT_HAVE_PC_SERIO
60 select ARCH_SPARSEMEM_ENABLE !! 18 select DMA_OPS
61 select ARCH_STACKWALK !! 19 select OF
62 select ARCH_SUPPORTS_ACPI !! 20 select OF_PROMTREE
63 select ARCH_SUPPORTS_ATOMIC_RMW !! 21 select HAVE_ASM_MODVERSIONS
64 select ARCH_SUPPORTS_HUGETLBFS !! 22 select HAVE_ARCH_KGDB if !SMP || SPARC64
65 select ARCH_SUPPORTS_INT128 if CC_HAS_ !! 23 select HAVE_ARCH_TRACEHOOK
66 select ARCH_SUPPORTS_LTO_CLANG !! 24 select HAVE_ARCH_SECCOMP if SPARC64
67 select ARCH_SUPPORTS_LTO_CLANG_THIN !! 25 select HAVE_EXIT_THREAD
68 select ARCH_SUPPORTS_NUMA_BALANCING !! 26 select HAVE_PCI
69 select ARCH_USE_BUILTIN_BSWAP !! 27 select SYSCTL_EXCEPTION_TRACE
70 select ARCH_USE_CMPXCHG_LOCKREF !! 28 select RTC_CLASS
71 select ARCH_USE_QUEUED_RWLOCKS !! 29 select RTC_DRV_M48T59
72 select ARCH_USE_QUEUED_SPINLOCKS !! 30 select RTC_SYSTOHC
73 select ARCH_WANT_DEFAULT_BPF_JIT !! 31 select HAVE_ARCH_JUMP_LABEL if SPARC64
74 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_ <<
75 select ARCH_WANT_LD_ORPHAN_WARN <<
76 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEM <<
77 select ARCH_WANTS_NO_INSTR <<
78 select ARCH_WANTS_THP_SWAP if HAVE_ARC <<
79 select BUILDTIME_TABLE_SORT <<
80 select COMMON_CLK <<
81 select CPU_PM <<
82 select EFI <<
83 select GENERIC_CLOCKEVENTS <<
84 select GENERIC_CMOS_UPDATE <<
85 select GENERIC_CPU_AUTOPROBE <<
86 select GENERIC_CPU_DEVICES <<
87 select GENERIC_CPU_VULNERABILITIES <<
88 select GENERIC_ENTRY <<
89 select GENERIC_GETTIMEOFDAY <<
90 select GENERIC_IOREMAP if !ARCH_IOREMA <<
91 select GENERIC_IRQ_MATRIX_ALLOCATOR <<
92 select GENERIC_IRQ_MULTI_HANDLER <<
93 select GENERIC_IRQ_PROBE <<
94 select GENERIC_IRQ_SHOW 32 select GENERIC_IRQ_SHOW
95 select GENERIC_LIB_ASHLDI3 !! 33 select ARCH_WANT_IPC_PARSE_VERSION
96 select GENERIC_LIB_ASHRDI3 <<
97 select GENERIC_LIB_CMPDI2 <<
98 select GENERIC_LIB_LSHRDI3 <<
99 select GENERIC_LIB_UCMPDI2 <<
100 select GENERIC_LIB_DEVMEM_IS_ALLOWED <<
101 select GENERIC_PCI_IOMAP 34 select GENERIC_PCI_IOMAP
102 select GENERIC_SCHED_CLOCK !! 35 select HAVE_NMI_WATCHDOG if SPARC64
>> 36 select HAVE_CBPF_JIT if SPARC32
>> 37 select HAVE_EBPF_JIT if SPARC64
>> 38 select HAVE_DEBUG_BUGVERBOSE
103 select GENERIC_SMP_IDLE_THREAD 39 select GENERIC_SMP_IDLE_THREAD
104 select GENERIC_TIME_VSYSCALL !! 40 select GENERIC_STRNCPY_FROM_USER
105 select GENERIC_VDSO_TIME_NS !! 41 select GENERIC_STRNLEN_USER
106 select GPIOLIB !! 42 select MODULES_USE_ELF_RELA
107 select HAS_IOPORT !! 43 select PCI_SYSCALL if PCI
108 select HAVE_ARCH_AUDITSYSCALL !! 44 select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
109 select HAVE_ARCH_JUMP_LABEL !! 45 select ODD_RT_SIGACTION
110 select HAVE_ARCH_JUMP_LABEL_RELATIVE !! 46 select OLD_SIGSUSPEND
111 select HAVE_ARCH_KASAN !! 47 select CPU_NO_EFFICIENT_FFS
112 select HAVE_ARCH_KFENCE !! 48 select LOCKDEP_SMALL if LOCKDEP
113 select HAVE_ARCH_KGDB if PERF_EVENTS !! 49 select NEED_DMA_MAP_STATE
114 select HAVE_ARCH_MMAP_RND_BITS if MMU !! 50 select NEED_SG_DMA_LENGTH
115 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS !! 51 select SET_FS
116 select HAVE_ARCH_SECCOMP !! 52
117 select HAVE_ARCH_SECCOMP_FILTER !! 53 config SPARC32
118 select HAVE_ARCH_TRACEHOOK !! 54 def_bool !64BIT
>> 55 select ARCH_32BIT_OFF_T
>> 56 select ARCH_HAS_SYNC_DMA_FOR_CPU
>> 57 select GENERIC_ATOMIC64
>> 58 select CLZ_TAB
>> 59 select HAVE_UID16
>> 60 select OLD_SIGACTION
>> 61 select ZONE_DMA
>> 62
>> 63 config SPARC64
>> 64 def_bool 64BIT
>> 65 select HAVE_FUNCTION_TRACER
>> 66 select HAVE_FUNCTION_GRAPH_TRACER
>> 67 select HAVE_KRETPROBES
>> 68 select HAVE_KPROBES
>> 69 select MMU_GATHER_RCU_TABLE_FREE if SMP
119 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 70 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
120 select HAVE_ARCH_USERFAULTFD_MINOR if <<
121 select HAVE_ASM_MODVERSIONS <<
122 select HAVE_CONTEXT_TRACKING_USER <<
123 select HAVE_C_RECORDMCOUNT <<
124 select HAVE_DEBUG_KMEMLEAK <<
125 select HAVE_DEBUG_STACKOVERFLOW <<
126 select HAVE_DMA_CONTIGUOUS <<
127 select HAVE_DYNAMIC_FTRACE 71 select HAVE_DYNAMIC_FTRACE
128 select HAVE_DYNAMIC_FTRACE_WITH_ARGS <<
129 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT <<
130 select HAVE_DYNAMIC_FTRACE_WITH_REGS <<
131 select HAVE_EBPF_JIT <<
132 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
133 select HAVE_EXIT_THREAD <<
134 select HAVE_GUP_FAST <<
135 select HAVE_FTRACE_MCOUNT_RECORD 72 select HAVE_FTRACE_MCOUNT_RECORD
136 select HAVE_FUNCTION_ARG_ACCESS_API <<
137 select HAVE_FUNCTION_ERROR_INJECTION <<
138 select HAVE_FUNCTION_GRAPH_RETVAL if H <<
139 select HAVE_FUNCTION_GRAPH_TRACER <<
140 select HAVE_FUNCTION_TRACER <<
141 select HAVE_GCC_PLUGINS <<
142 select HAVE_GENERIC_VDSO <<
143 select HAVE_HW_BREAKPOINT if PERF_EVEN <<
144 select HAVE_IOREMAP_PROT <<
145 select HAVE_IRQ_EXIT_ON_IRQ_STACK <<
146 select HAVE_IRQ_TIME_ACCOUNTING <<
147 select HAVE_KPROBES <<
148 select HAVE_KPROBES_ON_FTRACE <<
149 select HAVE_KRETPROBES <<
150 select HAVE_LIVEPATCH <<
151 select HAVE_MOD_ARCH_SPECIFIC <<
152 select HAVE_NMI <<
153 select HAVE_OBJTOOL if AS_HAS_EXPLICIT <<
154 select HAVE_PCI <<
155 select HAVE_PERF_EVENTS <<
156 select HAVE_PERF_REGS <<
157 select HAVE_PERF_USER_STACK_DUMP <<
158 select HAVE_PREEMPT_DYNAMIC_KEY <<
159 select HAVE_REGS_AND_STACK_ACCESS_API <<
160 select HAVE_RELIABLE_STACKTRACE if UNW <<
161 select HAVE_RETHOOK <<
162 select HAVE_RSEQ <<
163 select HAVE_RUST <<
164 select HAVE_SAMPLE_FTRACE_DIRECT <<
165 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI <<
166 select HAVE_SETUP_PER_CPU_AREA if NUMA <<
167 select HAVE_STACK_VALIDATION if HAVE_O <<
168 select HAVE_STACKPROTECTOR <<
169 select HAVE_SYSCALL_TRACEPOINTS 73 select HAVE_SYSCALL_TRACEPOINTS
>> 74 select HAVE_CONTEXT_TRACKING
170 select HAVE_TIF_NOHZ 75 select HAVE_TIF_NOHZ
171 select HAVE_VIRT_CPU_ACCOUNTING_GEN if !! 76 select HAVE_DEBUG_KMEMLEAK
172 select IRQ_FORCED_THREADING !! 77 select IOMMU_HELPER
173 select IRQ_LOONGARCH_CPU <<
174 select LOCK_MM_AND_FIND_VMA <<
175 select MMU_GATHER_MERGE_VMAS if MMU <<
176 select MODULES_USE_ELF_RELA if MODULES <<
177 select NEED_PER_CPU_EMBED_FIRST_CHUNK <<
178 select NEED_PER_CPU_PAGE_FIRST_CHUNK <<
179 select OF <<
180 select OF_EARLY_FLATTREE <<
181 select PCI <<
182 select PCI_DOMAINS_GENERIC <<
183 select PCI_ECAM if ACPI <<
184 select PCI_LOONGSON <<
185 select PCI_MSI_ARCH_FALLBACKS <<
186 select PCI_QUIRKS <<
187 select PERF_USE_VMALLOC <<
188 select RTC_LIB <<
189 select SPARSE_IRQ 78 select SPARSE_IRQ
190 select SYSCTL_ARCH_UNALIGN_ALLOW !! 79 select RTC_DRV_CMOS
191 select SYSCTL_ARCH_UNALIGN_NO_WARN !! 80 select RTC_DRV_BQ4802
192 select SYSCTL_EXCEPTION_TRACE !! 81 select RTC_DRV_SUN4V
193 select SWIOTLB !! 82 select RTC_DRV_STARFIRE
194 select TRACE_IRQFLAGS_SUPPORT !! 83 select HAVE_PERF_EVENTS
195 select USE_PERCPU_NUMA_NODE_ID !! 84 select PERF_USE_VMALLOC
196 select USER_STACKTRACE_SUPPORT !! 85 select ARCH_HAVE_NMI_SAFE_CMPXCHG
197 select VDSO_GETRANDOM !! 86 select HAVE_C_RECORDMCOUNT
198 select ZONE_DMA32 !! 87 select HAVE_ARCH_AUDITSYSCALL
199 !! 88 select ARCH_SUPPORTS_ATOMIC_RMW
200 config 32BIT !! 89 select ARCH_SUPPORTS_DEBUG_PAGEALLOC
201 bool !! 90 select HAVE_NMI
202 !! 91 select HAVE_REGS_AND_STACK_ACCESS_API
203 config 64BIT !! 92 select ARCH_USE_QUEUED_RWLOCKS
204 def_bool y !! 93 select ARCH_USE_QUEUED_SPINLOCKS
205 !! 94 select GENERIC_TIME_VSYSCALL
206 config GENERIC_BUG !! 95 select ARCH_CLOCKSOURCE_DATA
207 def_bool y !! 96 select ARCH_HAS_PTE_SPECIAL
208 depends on BUG !! 97 select PCI_DOMAINS if PCI
209 !! 98 select ARCH_HAS_GIGANTIC_PAGE
210 config GENERIC_BUG_RELATIVE_POINTERS !! 99 select HAVE_SOFTIRQ_ON_OWN_STACK
211 def_bool y <<
212 depends on GENERIC_BUG <<
213 100
214 config GENERIC_CALIBRATE_DELAY !! 101 config ARCH_PROC_KCORE_TEXT
215 def_bool y 102 def_bool y
216 103
217 config GENERIC_CSUM !! 104 config CPU_BIG_ENDIAN
218 def_bool y 105 def_bool y
219 106
220 config GENERIC_HWEIGHT !! 107 config ARCH_ATU
221 def_bool y !! 108 bool
>> 109 default y if SPARC64
222 110
223 config L1_CACHE_SHIFT !! 111 config STACKTRACE_SUPPORT
224 int !! 112 bool
225 default "6" !! 113 default y if SPARC64
226 114
227 config LOCKDEP_SUPPORT 115 config LOCKDEP_SUPPORT
228 bool 116 bool
229 default y !! 117 default y if SPARC64
230 118
231 config STACKTRACE_SUPPORT !! 119 config ARCH_HIBERNATION_POSSIBLE
>> 120 def_bool y if SPARC64
>> 121
>> 122 config AUDIT_ARCH
232 bool 123 bool
233 default y 124 default y
234 125
235 # MACH_LOONGSON32 and MACH_LOONGSON64 are deli !! 126 config HAVE_SETUP_PER_CPU_AREA
236 # MIPS Loongson code, to preserve Loongson-spe !! 127 def_bool y if SPARC64
237 # are shared between architectures, and specif <<
238 config MACH_LOONGSON32 <<
239 def_bool 32BIT <<
240 128
241 config MACH_LOONGSON64 !! 129 config NEED_PER_CPU_EMBED_FIRST_CHUNK
242 def_bool 64BIT !! 130 def_bool y if SPARC64
243 131
244 config FIX_EARLYCON_MEM !! 132 config NEED_PER_CPU_PAGE_FIRST_CHUNK
245 def_bool y !! 133 def_bool y if SPARC64
246 134
247 config PGTABLE_2LEVEL !! 135 config MMU
248 bool 136 bool
>> 137 default y
249 138
250 config PGTABLE_3LEVEL !! 139 config HIGHMEM
251 bool 140 bool
>> 141 default y if SPARC32
>> 142 select KMAP_LOCAL
252 143
253 config PGTABLE_4LEVEL !! 144 config GENERIC_ISA_DMA
254 bool 145 bool
>> 146 default y if SPARC32
255 147
256 config PGTABLE_LEVELS 148 config PGTABLE_LEVELS
257 int !! 149 default 4 if 64BIT
258 default 2 if PGTABLE_2LEVEL !! 150 default 3
259 default 3 if PGTABLE_3LEVEL <<
260 default 4 if PGTABLE_4LEVEL <<
261 <<
262 config SCHED_OMIT_FRAME_POINTER <<
263 bool <<
264 default y <<
265 <<
266 config AS_HAS_EXPLICIT_RELOCS <<
267 def_bool $(as-instr,x:pcalau12i \$t0$( <<
268 <<
269 config AS_HAS_FCSR_CLASS <<
270 def_bool $(as-instr,movfcsr2gr \$t0$(c <<
271 <<
272 config AS_HAS_THIN_ADD_SUB <<
273 def_bool $(cc-option,-Wa$(comma)-mthin <<
274 <<
275 config AS_HAS_LSX_EXTENSION <<
276 def_bool $(as-instr,vld \$vr0$(comma)\ <<
277 <<
278 config AS_HAS_LASX_EXTENSION <<
279 def_bool $(as-instr,xvld \$xr0$(comma) <<
280 <<
281 config AS_HAS_LBT_EXTENSION <<
282 def_bool $(as-instr,movscr2gr \$a0$(co <<
283 <<
284 config AS_HAS_LVZ_EXTENSION <<
285 def_bool $(as-instr,hvcl 0) <<
286 <<
287 menu "Kernel type and options" <<
288 151
289 source "kernel/Kconfig.hz" !! 152 config ARCH_SUPPORTS_UPROBES
290 !! 153 def_bool y if SPARC64
291 choice <<
292 prompt "Page Table Layout" <<
293 default 16KB_2LEVEL if 32BIT <<
294 default 16KB_3LEVEL if 64BIT <<
295 help <<
296 Allows choosing the page table layou <<
297 of page size and page table levels. <<
298 address space are determined by the <<
299 <<
300 config 4KB_3LEVEL <<
301 bool "4KB with 3 levels" <<
302 select HAVE_PAGE_SIZE_4KB <<
303 select PGTABLE_3LEVEL <<
304 help <<
305 This option selects 4KB page size wi <<
306 support a maximum of 39 bits of appl <<
307 <<
308 config 4KB_4LEVEL <<
309 bool "4KB with 4 levels" <<
310 select HAVE_PAGE_SIZE_4KB <<
311 select PGTABLE_4LEVEL <<
312 help <<
313 This option selects 4KB page size wi <<
314 support a maximum of 48 bits of appl <<
315 <<
316 config 16KB_2LEVEL <<
317 bool "16KB with 2 levels" <<
318 select HAVE_PAGE_SIZE_16KB <<
319 select PGTABLE_2LEVEL <<
320 help <<
321 This option selects 16KB page size w <<
322 support a maximum of 36 bits of appl <<
323 <<
324 config 16KB_3LEVEL <<
325 bool "16KB with 3 levels" <<
326 select HAVE_PAGE_SIZE_16KB <<
327 select PGTABLE_3LEVEL <<
328 help <<
329 This option selects 16KB page size w <<
330 support a maximum of 47 bits of appl <<
331 <<
332 config 64KB_2LEVEL <<
333 bool "64KB with 2 levels" <<
334 select HAVE_PAGE_SIZE_64KB <<
335 select PGTABLE_2LEVEL <<
336 help <<
337 This option selects 64KB page size w <<
338 support a maximum of 42 bits of appl <<
339 <<
340 config 64KB_3LEVEL <<
341 bool "64KB with 3 levels" <<
342 select HAVE_PAGE_SIZE_64KB <<
343 select PGTABLE_3LEVEL <<
344 help <<
345 This option selects 64KB page size w <<
346 support a maximum of 55 bits of appl <<
347 154
348 endchoice !! 155 menu "Processor type and features"
349 156
350 config CMDLINE !! 157 config SMP
351 string "Built-in kernel command line" !! 158 bool "Symmetric multi-processing support"
352 help 159 help
353 For most platforms, the arguments fo !! 160 This enables support for systems with more than one CPU. If you have
354 are provided at run-time, during boo !! 161 a system with only one CPU, say N. If you have a system with more
355 where either no arguments are being !! 162 than one CPU, say Y.
356 arguments are insufficient or even i <<
357 <<
358 When that occurs, it is possible to <<
359 line here and choose how the kernel <<
360 163
361 choice !! 164 If you say N here, the kernel will run on uni- and multiprocessor
362 prompt "Kernel command line type" !! 165 machines, but will use only one CPU of a multiprocessor machine. If
363 default CMDLINE_BOOTLOADER !! 166 you say Y here, the kernel will run on many, but not all,
364 help !! 167 uniprocessor machines. On a uniprocessor machine, the kernel
365 Choose how the kernel will handle th !! 168 will run faster if you say N here.
366 line. <<
367 169
368 config CMDLINE_BOOTLOADER !! 170 People using multiprocessor machines who say Y here should also say
369 bool "Use bootloader kernel arguments !! 171 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
370 help !! 172 Management" code will be disabled if you say Y here.
371 Prefer the command-line passed by th <<
372 Use the built-in command line as fal <<
373 during boot. This is the default beh <<
374 173
375 config CMDLINE_EXTEND !! 174 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
376 bool "Use built-in to extend bootloade !! 175 available at <https://www.tldp.org/docs.html#howto>.
377 help <<
378 The command-line arguments provided <<
379 appended to the built-in command lin <<
380 cases where the provided arguments a <<
381 you don't want to or cannot modify t <<
382 176
383 config CMDLINE_FORCE !! 177 If you don't know what to do here, say N.
384 bool "Always use the built-in kernel c <<
385 help <<
386 Always use the built-in command line <<
387 boot. This is useful in case you nee <<
388 command line on systems where you do <<
389 over it. <<
390 178
391 endchoice !! 179 config NR_CPUS
>> 180 int "Maximum number of CPUs"
>> 181 depends on SMP
>> 182 range 2 32 if SPARC32
>> 183 range 2 4096 if SPARC64
>> 184 default 32 if SPARC32
>> 185 default 4096 if SPARC64
392 186
393 config BUILTIN_DTB !! 187 source "kernel/Kconfig.hz"
394 bool "Enable built-in dtb in kernel" <<
395 depends on OF <<
396 help <<
397 Some existing systems do not provide <<
398 the kernel at boot time. Let's provi <<
399 kernel, keyed by the dts filename, c <<
400 188
401 Built-in DTBs are generic enough and !! 189 config GENERIC_HWEIGHT
>> 190 bool
>> 191 default y
402 192
403 config BUILTIN_DTB_NAME !! 193 config GENERIC_CALIBRATE_DELAY
404 string "Source file for built-in dtb" !! 194 bool
405 depends on BUILTIN_DTB !! 195 default y
406 help <<
407 Base name (without suffix, relative <<
408 for the DTS file that will be used t <<
409 the kernel. <<
410 196
411 config DMI !! 197 config ARCH_MAY_HAVE_PC_FDC
412 bool "Enable DMI scanning" !! 198 bool
413 select DMI_SCAN_MACHINE_NON_EFI_FALLBA <<
414 default y 199 default y
415 help <<
416 This enables SMBIOS/DMI feature for <<
417 DMI to identify machine quirks. <<
418 200
419 config EFI !! 201 config EMULATED_CMPXCHG
420 bool "EFI runtime service support" !! 202 bool
421 select UCS2_STRING !! 203 default y if SPARC32
422 select EFI_RUNTIME_WRAPPERS <<
423 help 204 help
424 This enables the kernel to use EFI r !! 205 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
425 available (such as the EFI variable !! 206 is emulated, and therefore it is not completely atomic.
426 207
427 config EFI_STUB !! 208 # Makefile helpers
428 bool "EFI boot stub support" !! 209 config SPARC32_SMP
>> 210 bool
429 default y 211 default y
430 depends on EFI !! 212 depends on SPARC32 && SMP
431 select EFI_GENERIC_STUB <<
432 help <<
433 This kernel feature allows the kerne <<
434 EFI firmware without the use of a bo <<
435 213
436 config SCHED_SMT !! 214 config SPARC64_SMP
437 bool "SMT scheduler support" !! 215 bool
438 depends on SMP <<
439 default y 216 default y
440 help !! 217 depends on SPARC64 && SMP
441 Improves scheduler's performance whe <<
442 threads in one physical core. <<
443 218
444 config SMP !! 219 config EARLYFB
445 bool "Multi-Processing support" !! 220 bool "Support for early boot text console"
>> 221 default y
>> 222 depends on SPARC64
446 help 223 help
447 This enables support for systems wit !! 224 Say Y here to enable a faster early framebuffer boot console.
448 a system with only one CPU, say N. I <<
449 than one CPU, say Y. <<
450 <<
451 If you say N here, the kernel will r <<
452 machines, but will use only one CPU <<
453 you say Y here, the kernel will run <<
454 uniprocessor machines. On a uniproce <<
455 will run faster if you say N here. <<
456 <<
457 See also the SMP-HOWTO available at <<
458 <<
459 If you don't know what to do here, s <<
460 225
461 config HOTPLUG_CPU 226 config HOTPLUG_CPU
462 bool "Support for hot-pluggable CPUs" 227 bool "Support for hot-pluggable CPUs"
463 depends on SMP !! 228 depends on SPARC64 && SMP
464 select GENERIC_IRQ_MIGRATION <<
465 help 229 help
466 Say Y here to allow turning CPUs off !! 230 Say Y here to experiment with turning CPUs off and on. CPUs
467 controlled through /sys/devices/syst !! 231 can be controlled through /sys/devices/system/cpu/cpu#.
468 (Note: power management support will <<
469 automatically on SMP systems. ) <<
470 Say N if you want to disable CPU hot 232 Say N if you want to disable CPU hotplug.
471 233
472 config NR_CPUS !! 234 if SPARC64
473 int "Maximum number of CPUs (2-256)" !! 235 source "drivers/cpufreq/Kconfig"
474 range 2 256 !! 236 endif
475 depends on SMP !! 237
476 default "64" !! 238 config US3_MC
>> 239 tristate "UltraSPARC-III Memory Controller driver"
>> 240 depends on SPARC64
>> 241 default y
477 help 242 help
478 This allows you to specify the maxim !! 243 This adds a driver for the UltraSPARC-III memory controller.
479 kernel will support. !! 244 Loading this driver allows exact mnemonic strings to be
>> 245 printed in the event of a memory error, so that the faulty DIMM
>> 246 on the motherboard can be matched to the error.
>> 247
>> 248 If in doubt, say Y, as this information can be very useful.
>> 249
>> 250 # Global things across all Sun machines.
>> 251 config GENERIC_LOCKBREAK
>> 252 bool
>> 253 default y
>> 254 depends on SPARC64 && SMP && PREEMPTION
480 255
481 config NUMA 256 config NUMA
482 bool "NUMA Support" !! 257 bool "NUMA support"
483 select SMP !! 258 depends on SPARC64 && SMP
484 help <<
485 Say Y to compile the kernel with NUM <<
486 support. This option improves perfo <<
487 than one NUMA node; on single node s <<
488 to leave it disabled. <<
489 259
490 config NODES_SHIFT 260 config NODES_SHIFT
491 int !! 261 int "Maximum NUMA Nodes (as a power of 2)"
492 default "6" !! 262 range 4 5 if SPARC64
>> 263 default "5"
493 depends on NUMA 264 depends on NUMA
>> 265 help
>> 266 Specify the maximum number of NUMA Nodes available on the target
>> 267 system. Increases memory reserved to accommodate various tables.
>> 268
>> 269 config ARCH_SPARSEMEM_ENABLE
>> 270 def_bool y if SPARC64
>> 271 select SPARSEMEM_VMEMMAP_ENABLE
494 272
495 config ARCH_FORCE_MAX_ORDER !! 273 config ARCH_SPARSEMEM_DEFAULT
>> 274 def_bool y if SPARC64
>> 275
>> 276 config FORCE_MAX_ZONEORDER
496 int "Maximum zone order" 277 int "Maximum zone order"
497 default "13" if PAGE_SIZE_64KB !! 278 default "13"
498 default "11" if PAGE_SIZE_16KB <<
499 default "10" <<
500 help 279 help
501 The kernel memory allocator divides 280 The kernel memory allocator divides physically contiguous memory
502 blocks into "zones", where each zone 281 blocks into "zones", where each zone is a power of two number of
503 pages. This option selects the larg 282 pages. This option selects the largest power of two that the kernel
504 keeps in the memory allocator. If y 283 keeps in the memory allocator. If you need to allocate very large
505 blocks of physically contiguous memo 284 blocks of physically contiguous memory, then you may need to
506 increase this value. 285 increase this value.
507 286
508 The page size is not necessarily 4KB !! 287 This config option is actually maximum order plus one. For example,
509 when choosing a value for this optio !! 288 a value of 13 means that the largest free memory block is 2^12 pages.
510 <<
511 config ARCH_IOREMAP <<
512 bool "Enable LoongArch DMW-based iorem <<
513 help <<
514 We use generic TLB-based ioremap() b <<
515 protection support. However, you can <<
516 ioremap() for better performance. <<
517 289
518 config ARCH_WRITECOMBINE !! 290 if SPARC64
519 bool "Enable WriteCombine (WUC) for io !! 291 source "kernel/power/Kconfig"
520 help !! 292 endif
521 LoongArch maintains cache coherency <<
522 with LS7A chipsets the WUC attribute <<
523 is similar to WriteCombine) is out o <<
524 machanism for PCIe devices (this is <<
525 may be fixed in newer chipsets). <<
526 <<
527 This means WUC can only used for wri <<
528 this option is disabled by default, <<
529 SUC for ioremap(). You can enable th <<
530 to run on hardware without this bug. <<
531 <<
532 You can override this setting via wr <<
533 293
534 config ARCH_STRICT_ALIGN !! 294 config SCHED_SMT
535 bool "Enable -mstrict-align to prevent !! 295 bool "SMT (Hyperthreading) scheduler support"
>> 296 depends on SPARC64 && SMP
536 default y 297 default y
537 help 298 help
538 Not all LoongArch cores support h/w !! 299 SMT scheduler support improves the CPU scheduler's decision making
539 -mstrict-align build parameter to pr !! 300 when dealing with SPARC cpus at a cost of slightly increased overhead
540 !! 301 in some places. If unsure say N here.
541 CPUs with h/w unaligned access suppo <<
542 Loongson-2K2000/2K3000/3A5000/3C5000 <<
543 <<
544 CPUs without h/w unaligned access su <<
545 Loongson-2K500/2K1000. <<
546 302
547 This option is enabled by default to !! 303 config SCHED_MC
548 on all LoongArch systems. But you ca !! 304 bool "Multi-core scheduler support"
549 to run kernel only on systems with h !! 305 depends on SPARC64 && SMP
550 order to optimise for performance. <<
551 <<
552 config CPU_HAS_FPU <<
553 bool <<
554 default y 306 default y
555 <<
556 config CPU_HAS_LSX <<
557 bool "Support for the Loongson SIMD Ex <<
558 depends on AS_HAS_LSX_EXTENSION <<
559 help 307 help
560 Loongson SIMD Extension (LSX) introd !! 308 Multi-core scheduler support improves the CPU scheduler's decision
561 and a set of SIMD instructions to op !! 309 making when dealing with multi-core CPU chips at a cost of slightly
562 is enabled the kernel will support a !! 310 increased overhead in some places. If unsure say N here.
563 vector register contexts. If you kno <<
564 running on CPUs which do not support <<
565 not be making use of it then you may <<
566 the size & complexity of your kernel <<
567 311
568 If unsure, say Y. !! 312 config CMDLINE_BOOL
>> 313 bool "Default bootloader kernel arguments"
>> 314 depends on SPARC64
569 315
570 config CPU_HAS_LASX !! 316 config CMDLINE
571 bool "Support for the Loongson Advance !! 317 string "Initial kernel command string"
572 depends on CPU_HAS_LSX !! 318 depends on CMDLINE_BOOL
573 depends on AS_HAS_LASX_EXTENSION !! 319 default "console=ttyS0,9600 root=/dev/sda1"
>> 320 help
>> 321 Say Y here if you want to be able to pass default arguments to
>> 322 the kernel. This will be overridden by the bootloader, if you
>> 323 use one (such as SILO). This is most useful if you want to boot
>> 324 a kernel from TFTP, and want default options to be available
>> 325 with having them passed on the command line.
>> 326
>> 327 NOTE: This option WILL override the PROM bootargs setting!
>> 328
>> 329 config SUN_PM
>> 330 bool
>> 331 default y if SPARC32
>> 332 help
>> 333 Enable power management and CPU standby features on supported
>> 334 SPARC platforms.
>> 335
>> 336 config SPARC_LED
>> 337 tristate "Sun4m LED driver"
>> 338 depends on SPARC32
>> 339 help
>> 340 This driver toggles the front-panel LED on sun4m systems
>> 341 in a user-specifiable manner. Its state can be probed
>> 342 by reading /proc/led and its blinking mode can be changed
>> 343 via writes to /proc/led
>> 344
>> 345 config SERIAL_CONSOLE
>> 346 bool
>> 347 depends on SPARC32
>> 348 default y
>> 349 help
>> 350 If you say Y here, it will be possible to use a serial port as the
>> 351 system console (the system console is the device which receives all
>> 352 kernel messages and warnings and which allows logins in single user
>> 353 mode). This could be useful if some terminal or printer is connected
>> 354 to that serial port.
>> 355
>> 356 Even if you say Y here, the currently visible virtual console
>> 357 (/dev/tty0) will still be used as the system console by default, but
>> 358 you can alter that using a kernel command line option such as
>> 359 "console=ttyS1". (Try "man bootparam" or see the documentation of
>> 360 your boot loader (silo) about how to pass options to the kernel at
>> 361 boot time.)
>> 362
>> 363 If you don't have a graphics card installed and you say Y here, the
>> 364 kernel will automatically use the first serial line, /dev/ttyS0, as
>> 365 system console.
>> 366
>> 367 If unsure, say N.
>> 368
>> 369 config SPARC_LEON
>> 370 bool "Sparc Leon processor family"
>> 371 depends on SPARC32
>> 372 select USB_EHCI_BIG_ENDIAN_MMIO
>> 373 select USB_EHCI_BIG_ENDIAN_DESC
>> 374 select USB_UHCI_BIG_ENDIAN_MMIO
>> 375 select USB_UHCI_BIG_ENDIAN_DESC
>> 376 help
>> 377 If you say Y here if you are running on a SPARC-LEON processor.
>> 378 The LEON processor is a synthesizable VHDL model of the
>> 379 SPARC-v8 standard. LEON is part of the GRLIB collection of
>> 380 IP cores that are distributed under GPL. GRLIB can be downloaded
>> 381 from www.gaisler.com. You can download a sparc-linux cross-compilation
>> 382 toolchain at www.gaisler.com.
>> 383
>> 384 if SPARC_LEON
>> 385 menu "U-Boot options"
>> 386
>> 387 config UBOOT_LOAD_ADDR
>> 388 hex "uImage Load Address"
>> 389 default 0x40004000
>> 390 help
>> 391 U-Boot kernel load address, the address in physical address space
>> 392 where u-boot will place the Linux kernel before booting it.
>> 393 This address is normally the base address of main memory + 0x4000.
>> 394
>> 395 config UBOOT_FLASH_ADDR
>> 396 hex "uImage.o Load Address"
>> 397 default 0x00080000
>> 398 help
>> 399 Optional setting only affecting the uImage.o ELF-image used to
>> 400 download the uImage file to the target using a ELF-loader other than
>> 401 U-Boot. It may for example be used to download an uImage to FLASH with
>> 402 the GRMON utility before even starting u-boot.
>> 403
>> 404 config UBOOT_ENTRY_ADDR
>> 405 hex "uImage Entry Address"
>> 406 default 0xf0004000
574 help 407 help
575 Loongson Advanced SIMD Extension (LA !! 408 Do not change this unless you know what you're doing. This is
576 registers and a set of SIMD instruct !! 409 hardcoded by the SPARC32 and LEON port.
577 option is enabled the kernel will su <<
578 vector register contexts. If you kno <<
579 running on CPUs which do not support <<
580 not be making use of it then you may <<
581 the size & complexity of your kernel <<
582 410
583 If unsure, say Y. !! 411 This is the virtual address u-boot jumps to when booting the Linux
>> 412 Kernel.
584 413
585 config CPU_HAS_LBT !! 414 endmenu
586 bool "Support for the Loongson Binary !! 415 endif
587 depends on AS_HAS_LBT_EXTENSION <<
588 help <<
589 Loongson Binary Translation (LBT) in <<
590 to SCR3), x86/ARM eflags (eflags) an <<
591 Enabling this option allows the kern <<
592 specific to LBT. <<
593 416
594 If you want to use this feature, suc !! 417 endmenu
595 Translator (LAT), say Y. <<
596 418
597 config CPU_HAS_PREFETCH !! 419 menu "Bus options (PCI etc.)"
>> 420 config SBUS
598 bool 421 bool
599 default y 422 default y
600 423
601 config ARCH_SUPPORTS_KEXEC !! 424 config SBUSCHAR
602 def_bool y !! 425 bool
603 !! 426 default y
604 config ARCH_SUPPORTS_CRASH_DUMP <<
605 def_bool y <<
606 <<
607 config ARCH_SELECTS_CRASH_DUMP <<
608 def_bool y <<
609 depends on CRASH_DUMP <<
610 select RELOCATABLE <<
611 <<
612 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO <<
613 def_bool CRASH_RESERVE <<
614 <<
615 config RELOCATABLE <<
616 bool "Relocatable kernel" <<
617 select ARCH_HAS_RELR <<
618 help <<
619 This builds the kernel as a Position <<
620 which retains all relocation metadat <<
621 the kernel binary at runtime to a di <<
622 its link address. <<
623 427
624 config RANDOMIZE_BASE !! 428 config SUN_LDOMS
625 bool "Randomize the address of the ker !! 429 bool "Sun Logical Domains support"
626 depends on RELOCATABLE !! 430 depends on SPARC64
627 help 431 help
628 Randomizes the physical and virtual !! 432 Say Y here is you want to support virtual devices via
629 kernel image is loaded, as a securi !! 433 Logical Domains.
630 deters exploit attempts relying on <<
631 of kernel internals. <<
632 434
633 The kernel will be offset by up to !! 435 config PCIC_PCI
>> 436 bool
>> 437 depends on PCI && SPARC32 && !SPARC_LEON
>> 438 default y
634 439
635 If unsure, say N. !! 440 config LEON_PCI
>> 441 bool
>> 442 depends on PCI && SPARC_LEON
>> 443 default y
636 444
637 config RANDOMIZE_BASE_MAX_OFFSET !! 445 config SPARC_GRPCI1
638 hex "Maximum KASLR offset" if EXPERT !! 446 bool "GRPCI Host Bridge Support"
639 depends on RANDOMIZE_BASE !! 447 depends on LEON_PCI
640 range 0x0 0x10000000 !! 448 default y
641 default "0x01000000" <<
642 help 449 help
643 When KASLR is active, this provides !! 450 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
644 be applied to the kernel image. It s !! 451 PCI host controller is typically found in GRLIB SPARC32/LEON
645 amount of physical RAM available in !! 452 systems. The driver has one property (all_pci_errors) controlled
646 !! 453 from the bootloader that makes the GRPCI to generate interrupts
647 This is limited by the size of the l !! 454 on detected PCI Parity and System errors.
648 <<
649 source "kernel/livepatch/Kconfig" <<
650 455
651 config PARAVIRT !! 456 config SPARC_GRPCI2
652 bool "Enable paravirtualization code" !! 457 bool "GRPCI2 Host Bridge Support"
653 depends on AS_HAS_LVZ_EXTENSION !! 458 depends on LEON_PCI
>> 459 default y
654 help 460 help
655 This changes the kernel so it can mo !! 461 Say Y here to include the GRPCI2 Host Bridge Driver.
656 under a hypervisor, potentially impr <<
657 over full virtualization. However, <<
658 the kernel is theoretically slower a <<
659 462
660 config PARAVIRT_TIME_ACCOUNTING !! 463 config SUN_OPENPROMFS
661 bool "Paravirtual steal time accountin !! 464 tristate "Openprom tree appears in /proc/openprom"
662 depends on PARAVIRT <<
663 help 465 help
664 Select this option to enable fine gr !! 466 If you say Y, the OpenPROM device tree will be available as a
665 accounting. Time spent executing oth !! 467 virtual file system, which you can mount to /proc/openprom by "mount
666 the current vCPU is discounted from !! 468 -t openpromfs none /proc/openprom".
667 that, there can be a small performan <<
668 <<
669 If in doubt, say N here. <<
670 469
671 endmenu !! 470 To compile the /proc/openprom support as a module, choose M here: the
>> 471 module will be called openpromfs.
672 472
673 config ARCH_SELECT_MEMORY_MODEL !! 473 Only choose N if you know in advance that you will not need to modify
674 def_bool y !! 474 OpenPROM settings on the running system.
675 475
676 config ARCH_FLATMEM_ENABLE !! 476 # Makefile helpers
677 def_bool y !! 477 config SPARC64_PCI
678 depends on !NUMA <<
679 <<
680 config ARCH_SPARSEMEM_ENABLE <<
681 def_bool y <<
682 select SPARSEMEM_VMEMMAP_ENABLE <<
683 help <<
684 Say Y to support efficient handling <<
685 for architectures which are either N <<
686 or have huge holes in the physical a <<
687 See <file:Documentation/mm/numa.rst> <<
688 <<
689 config ARCH_MEMORY_PROBE <<
690 def_bool y <<
691 depends on MEMORY_HOTPLUG <<
692 <<
693 config MMU <<
694 bool 478 bool
695 default y 479 default y
>> 480 depends on SPARC64 && PCI
696 481
697 config ARCH_MMAP_RND_BITS_MIN !! 482 config SPARC64_PCI_MSI
698 default 12 !! 483 bool
699 !! 484 default y
700 config ARCH_MMAP_RND_BITS_MAX !! 485 depends on SPARC64_PCI && PCI_MSI
701 default 18 <<
702 <<
703 config ARCH_SUPPORTS_UPROBES <<
704 def_bool y <<
705 <<
706 config KASAN_SHADOW_OFFSET <<
707 hex <<
708 default 0x0 <<
709 depends on KASAN <<
710 <<
711 menu "Power management options" <<
712 <<
713 config ARCH_SUSPEND_POSSIBLE <<
714 def_bool y <<
715 486
716 config ARCH_HIBERNATION_POSSIBLE !! 487 endmenu
717 def_bool y <<
718 488
719 source "kernel/power/Kconfig" !! 489 config COMPAT
720 source "drivers/acpi/Kconfig" !! 490 bool
721 source "drivers/cpufreq/Kconfig" !! 491 depends on SPARC64
>> 492 default y
>> 493 select HAVE_UID16
>> 494 select ARCH_WANT_OLD_COMPAT_IPC
>> 495 select COMPAT_OLD_SIGACTION
722 496
723 endmenu !! 497 config SYSVIPC_COMPAT
>> 498 bool
>> 499 depends on COMPAT && SYSVIPC
>> 500 default y
724 501
725 source "arch/loongarch/kvm/Kconfig" !! 502 source "drivers/sbus/char/Kconfig"
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