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 OF
61 select ARCH_STACKWALK !! 19 select OF_PROMTREE
62 select ARCH_SUPPORTS_ACPI !! 20 select HAVE_IDE
63 select ARCH_SUPPORTS_ATOMIC_RMW !! 21 select HAVE_OPROFILE
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_EXIT_THREAD
67 select ARCH_SUPPORTS_LTO_CLANG_THIN !! 25 select HAVE_PCI
68 select ARCH_SUPPORTS_NUMA_BALANCING !! 26 select SYSCTL_EXCEPTION_TRACE
69 select ARCH_USE_BUILTIN_BSWAP !! 27 select RTC_CLASS
70 select ARCH_USE_CMPXCHG_LOCKREF !! 28 select RTC_DRV_M48T59
71 select ARCH_USE_QUEUED_RWLOCKS !! 29 select RTC_SYSTOHC
72 select ARCH_USE_QUEUED_SPINLOCKS !! 30 select HAVE_ARCH_JUMP_LABEL if SPARC64
73 select ARCH_WANT_DEFAULT_BPF_JIT !! 31 select HAVE_FAST_GUP 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_CLOCKEVENTS
105 select GENERIC_VDSO_TIME_NS !! 41 select GENERIC_STRNCPY_FROM_USER
106 select GPIOLIB !! 42 select GENERIC_STRNLEN_USER
107 select HAS_IOPORT !! 43 select MODULES_USE_ELF_RELA
108 select HAVE_ARCH_AUDITSYSCALL !! 44 select PCI_SYSCALL if PCI
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
116 select HAVE_ARCH_SECCOMP !! 52 config SPARC32
117 select HAVE_ARCH_SECCOMP_FILTER !! 53 def_bool !64BIT
118 select HAVE_ARCH_TRACEHOOK !! 54 select ARCH_32BIT_OFF_T
>> 55 select ARCH_HAS_SYNC_DMA_FOR_CPU
>> 56 select GENERIC_ATOMIC64
>> 57 select CLZ_TAB
>> 58 select HAVE_UID16
>> 59 select OLD_SIGACTION
>> 60
>> 61 config SPARC64
>> 62 def_bool 64BIT
>> 63 select HAVE_FUNCTION_TRACER
>> 64 select HAVE_FUNCTION_GRAPH_TRACER
>> 65 select HAVE_KRETPROBES
>> 66 select HAVE_KPROBES
>> 67 select HAVE_RCU_TABLE_FREE if SMP
>> 68 select HAVE_RCU_TABLE_NO_INVALIDATE if HAVE_RCU_TABLE_FREE
>> 69 select HAVE_MEMBLOCK_NODE_MAP
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
170 select HAVE_TIF_NOHZ !! 74 select HAVE_CONTEXT_TRACKING
171 select HAVE_VIRT_CPU_ACCOUNTING_GEN if !! 75 select HAVE_DEBUG_KMEMLEAK
172 select IRQ_FORCED_THREADING !! 76 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 77 select SPARSE_IRQ
190 select SYSCTL_ARCH_UNALIGN_ALLOW !! 78 select RTC_DRV_CMOS
191 select SYSCTL_ARCH_UNALIGN_NO_WARN !! 79 select RTC_DRV_BQ4802
192 select SYSCTL_EXCEPTION_TRACE !! 80 select RTC_DRV_SUN4V
193 select SWIOTLB !! 81 select RTC_DRV_STARFIRE
194 select TRACE_IRQFLAGS_SUPPORT !! 82 select HAVE_PERF_EVENTS
195 select USE_PERCPU_NUMA_NODE_ID !! 83 select PERF_USE_VMALLOC
196 select USER_STACKTRACE_SUPPORT !! 84 select IRQ_PREFLOW_FASTEOI
197 select VDSO_GETRANDOM !! 85 select ARCH_HAVE_NMI_SAFE_CMPXCHG
198 select ZONE_DMA32 !! 86 select HAVE_C_RECORDMCOUNT
199 !! 87 select HAVE_ARCH_AUDITSYSCALL
200 config 32BIT !! 88 select ARCH_SUPPORTS_ATOMIC_RMW
201 bool !! 89 select HAVE_NMI
202 !! 90 select HAVE_REGS_AND_STACK_ACCESS_API
203 config 64BIT !! 91 select ARCH_USE_QUEUED_RWLOCKS
204 def_bool y !! 92 select ARCH_USE_QUEUED_SPINLOCKS
205 !! 93 select GENERIC_TIME_VSYSCALL
206 config GENERIC_BUG !! 94 select ARCH_CLOCKSOURCE_DATA
207 def_bool y !! 95 select ARCH_HAS_PTE_SPECIAL
208 depends on BUG !! 96 select PCI_DOMAINS if PCI
>> 97 select ARCH_HAS_GIGANTIC_PAGE
209 98
210 config GENERIC_BUG_RELATIVE_POINTERS !! 99 config ARCH_DEFCONFIG
211 def_bool y !! 100 string
212 depends on GENERIC_BUG !! 101 default "arch/sparc/configs/sparc32_defconfig" if SPARC32
>> 102 default "arch/sparc/configs/sparc64_defconfig" if SPARC64
213 103
214 config GENERIC_CALIBRATE_DELAY !! 104 config ARCH_PROC_KCORE_TEXT
215 def_bool y 105 def_bool y
216 106
217 config GENERIC_CSUM !! 107 config CPU_BIG_ENDIAN
218 def_bool y 108 def_bool y
219 109
220 config GENERIC_HWEIGHT !! 110 config ARCH_ATU
221 def_bool y !! 111 bool
>> 112 default y if SPARC64
222 113
223 config L1_CACHE_SHIFT !! 114 config STACKTRACE_SUPPORT
224 int !! 115 bool
225 default "6" !! 116 default y if SPARC64
226 117
227 config LOCKDEP_SUPPORT 118 config LOCKDEP_SUPPORT
228 bool 119 bool
229 default y !! 120 default y if SPARC64
230 121
231 config STACKTRACE_SUPPORT !! 122 config ARCH_HIBERNATION_POSSIBLE
>> 123 def_bool y if SPARC64
>> 124
>> 125 config AUDIT_ARCH
232 bool 126 bool
233 default y 127 default y
234 128
235 # MACH_LOONGSON32 and MACH_LOONGSON64 are deli !! 129 config HAVE_SETUP_PER_CPU_AREA
236 # MIPS Loongson code, to preserve Loongson-spe !! 130 def_bool y if SPARC64
237 # are shared between architectures, and specif <<
238 config MACH_LOONGSON32 <<
239 def_bool 32BIT <<
240 131
241 config MACH_LOONGSON64 !! 132 config NEED_PER_CPU_EMBED_FIRST_CHUNK
242 def_bool 64BIT !! 133 def_bool y if SPARC64
243 134
244 config FIX_EARLYCON_MEM !! 135 config NEED_PER_CPU_PAGE_FIRST_CHUNK
245 def_bool y !! 136 def_bool y if SPARC64
246 137
247 config PGTABLE_2LEVEL !! 138 config MMU
248 bool 139 bool
>> 140 default y
249 141
250 config PGTABLE_3LEVEL !! 142 config HIGHMEM
251 bool 143 bool
>> 144 default y if SPARC32
252 145
253 config PGTABLE_4LEVEL !! 146 config ZONE_DMA
254 bool 147 bool
>> 148 default y if SPARC32
255 149
256 config PGTABLE_LEVELS !! 150 config GENERIC_ISA_DMA
257 int <<
258 default 2 if PGTABLE_2LEVEL <<
259 default 3 if PGTABLE_3LEVEL <<
260 default 4 if PGTABLE_4LEVEL <<
261 <<
262 config SCHED_OMIT_FRAME_POINTER <<
263 bool 151 bool
264 default y !! 152 default y if SPARC32
265 <<
266 config AS_HAS_EXPLICIT_RELOCS <<
267 def_bool $(as-instr,x:pcalau12i \$t0$( <<
268 153
269 config AS_HAS_FCSR_CLASS !! 154 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
270 def_bool $(as-instr,movfcsr2gr \$t0$(c !! 155 def_bool y if SPARC64
271 156
272 config AS_HAS_THIN_ADD_SUB !! 157 config PGTABLE_LEVELS
273 def_bool $(cc-option,-Wa$(comma)-mthin !! 158 default 4 if 64BIT
274 !! 159 default 3
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" <<
288 160
289 source "kernel/Kconfig.hz" !! 161 config ARCH_SUPPORTS_UPROBES
>> 162 def_bool y if SPARC64
290 163
291 choice !! 164 menu "Processor type and features"
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 <<
347 165
348 endchoice !! 166 config SMP
>> 167 bool "Symmetric multi-processing support"
>> 168 ---help---
>> 169 This enables support for systems with more than one CPU. If you have
>> 170 a system with only one CPU, say N. If you have a system with more
>> 171 than one CPU, say Y.
349 172
350 config CMDLINE !! 173 If you say N here, the kernel will run on uni- and multiprocessor
351 string "Built-in kernel command line" !! 174 machines, but will use only one CPU of a multiprocessor machine. If
352 help !! 175 you say Y here, the kernel will run on many, but not all,
353 For most platforms, the arguments fo !! 176 uniprocessor machines. On a uniprocessor machine, the kernel
354 are provided at run-time, during boo !! 177 will run faster if you say N here.
355 where either no arguments are being <<
356 arguments are insufficient or even i <<
357 178
358 When that occurs, it is possible to !! 179 People using multiprocessor machines who say Y here should also say
359 line here and choose how the kernel !! 180 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
>> 181 Management" code will be disabled if you say Y here.
360 182
361 choice !! 183 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
362 prompt "Kernel command line type" !! 184 available at <http://www.tldp.org/docs.html#howto>.
363 default CMDLINE_BOOTLOADER <<
364 help <<
365 Choose how the kernel will handle th <<
366 line. <<
367 185
368 config CMDLINE_BOOTLOADER !! 186 If you don't know what to do here, say N.
369 bool "Use bootloader kernel arguments <<
370 help <<
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 <<
374 187
375 config CMDLINE_EXTEND !! 188 config NR_CPUS
376 bool "Use built-in to extend bootloade !! 189 int "Maximum number of CPUs"
377 help !! 190 depends on SMP
378 The command-line arguments provided !! 191 range 2 32 if SPARC32
379 appended to the built-in command lin !! 192 range 2 4096 if SPARC64
380 cases where the provided arguments a !! 193 default 32 if SPARC32
381 you don't want to or cannot modify t !! 194 default 4096 if SPARC64
382 195
383 config CMDLINE_FORCE !! 196 source "kernel/Kconfig.hz"
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. <<
390 197
391 endchoice !! 198 config GENERIC_HWEIGHT
>> 199 bool
>> 200 default y
392 201
393 config BUILTIN_DTB !! 202 config GENERIC_CALIBRATE_DELAY
394 bool "Enable built-in dtb in kernel" !! 203 bool
395 depends on OF !! 204 default y
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 <<
400 205
401 Built-in DTBs are generic enough and !! 206 config ARCH_MAY_HAVE_PC_FDC
>> 207 bool
>> 208 default y
402 209
403 config BUILTIN_DTB_NAME !! 210 config EMULATED_CMPXCHG
404 string "Source file for built-in dtb" !! 211 bool
405 depends on BUILTIN_DTB !! 212 default y if SPARC32
406 help 213 help
407 Base name (without suffix, relative !! 214 Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
408 for the DTS file that will be used t !! 215 is emulated, and therefore it is not completely atomic.
409 the kernel. <<
410 216
411 config DMI !! 217 # Makefile helpers
412 bool "Enable DMI scanning" !! 218 config SPARC32_SMP
413 select DMI_SCAN_MACHINE_NON_EFI_FALLBA !! 219 bool
414 default y 220 default y
415 help !! 221 depends on SPARC32 && SMP
416 This enables SMBIOS/DMI feature for <<
417 DMI to identify machine quirks. <<
418 <<
419 config EFI <<
420 bool "EFI runtime service support" <<
421 select UCS2_STRING <<
422 select EFI_RUNTIME_WRAPPERS <<
423 help <<
424 This enables the kernel to use EFI r <<
425 available (such as the EFI variable <<
426 222
427 config EFI_STUB !! 223 config SPARC64_SMP
428 bool "EFI boot stub support" !! 224 bool
429 default y 225 default y
430 depends on EFI !! 226 depends on SPARC64 && SMP
431 select EFI_GENERIC_STUB <<
432 help <<
433 This kernel feature allows the kerne <<
434 EFI firmware without the use of a bo <<
435 227
436 config SCHED_SMT !! 228 config EARLYFB
437 bool "SMT scheduler support" !! 229 bool "Support for early boot text console"
438 depends on SMP <<
439 default y 230 default y
>> 231 depends on SPARC64
440 help 232 help
441 Improves scheduler's performance whe !! 233 Say Y here to enable a faster early framebuffer boot console.
442 threads in one physical core. <<
443 234
444 config SMP !! 235 config SECCOMP
445 bool "Multi-Processing support" !! 236 bool "Enable seccomp to safely compute untrusted bytecode"
>> 237 depends on SPARC64 && PROC_FS
>> 238 default y
446 help 239 help
447 This enables support for systems wit !! 240 This kernel feature is useful for number crunching applications
448 a system with only one CPU, say N. I !! 241 that may need to compute untrusted bytecode during their
449 than one CPU, say Y. !! 242 execution. By using pipes or other transports made available to
450 !! 243 the process as file descriptors supporting the read/write
451 If you say N here, the kernel will r !! 244 syscalls, it's possible to isolate those applications in
452 machines, but will use only one CPU !! 245 their own address space using seccomp. Once seccomp is
453 you say Y here, the kernel will run !! 246 enabled via /proc/<pid>/seccomp, it cannot be disabled
454 uniprocessor machines. On a uniproce !! 247 and the task is only allowed to execute a few safe syscalls
455 will run faster if you say N here. !! 248 defined by each seccomp mode.
456 249
457 See also the SMP-HOWTO available at !! 250 If unsure, say Y. Only embedded should say N here.
458 <<
459 If you don't know what to do here, s <<
460 251
461 config HOTPLUG_CPU 252 config HOTPLUG_CPU
462 bool "Support for hot-pluggable CPUs" 253 bool "Support for hot-pluggable CPUs"
463 depends on SMP !! 254 depends on SPARC64 && SMP
464 select GENERIC_IRQ_MIGRATION <<
465 help 255 help
466 Say Y here to allow turning CPUs off !! 256 Say Y here to experiment with turning CPUs off and on. CPUs
467 controlled through /sys/devices/syst !! 257 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 258 Say N if you want to disable CPU hotplug.
471 259
472 config NR_CPUS !! 260 if SPARC64
473 int "Maximum number of CPUs (2-256)" !! 261 source "drivers/cpufreq/Kconfig"
474 range 2 256 !! 262 endif
475 depends on SMP !! 263
476 default "64" !! 264 config US3_MC
>> 265 tristate "UltraSPARC-III Memory Controller driver"
>> 266 depends on SPARC64
>> 267 default y
477 help 268 help
478 This allows you to specify the maxim !! 269 This adds a driver for the UltraSPARC-III memory controller.
479 kernel will support. !! 270 Loading this driver allows exact mnemonic strings to be
>> 271 printed in the event of a memory error, so that the faulty DIMM
>> 272 on the motherboard can be matched to the error.
>> 273
>> 274 If in doubt, say Y, as this information can be very useful.
>> 275
>> 276 # Global things across all Sun machines.
>> 277 config GENERIC_LOCKBREAK
>> 278 bool
>> 279 default y
>> 280 depends on SPARC64 && SMP && PREEMPT
480 281
481 config NUMA 282 config NUMA
482 bool "NUMA Support" !! 283 bool "NUMA support"
483 select SMP !! 284 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. <<
489 285
490 config NODES_SHIFT 286 config NODES_SHIFT
491 int !! 287 int "Maximum NUMA Nodes (as a power of 2)"
492 default "6" !! 288 range 4 5 if SPARC64
493 depends on NUMA !! 289 default "5"
>> 290 depends on NEED_MULTIPLE_NODES
>> 291 help
>> 292 Specify the maximum number of NUMA Nodes available on the target
>> 293 system. Increases memory reserved to accommodate various tables.
>> 294
>> 295 # Some NUMA nodes have memory ranges that span
>> 296 # other nodes. Even though a pfn is valid and
>> 297 # between a node's start and end pfns, it may not
>> 298 # reside on that node. See memmap_init_zone()
>> 299 # for details.
>> 300 config NODES_SPAN_OTHER_NODES
>> 301 def_bool y
>> 302 depends on NEED_MULTIPLE_NODES
494 303
495 config ARCH_FORCE_MAX_ORDER !! 304 config ARCH_SPARSEMEM_ENABLE
>> 305 def_bool y if SPARC64
>> 306 select SPARSEMEM_VMEMMAP_ENABLE
>> 307
>> 308 config ARCH_SPARSEMEM_DEFAULT
>> 309 def_bool y if SPARC64
>> 310
>> 311 config FORCE_MAX_ZONEORDER
496 int "Maximum zone order" 312 int "Maximum zone order"
497 default "13" if PAGE_SIZE_64KB !! 313 default "13"
498 default "11" if PAGE_SIZE_16KB <<
499 default "10" <<
500 help 314 help
501 The kernel memory allocator divides 315 The kernel memory allocator divides physically contiguous memory
502 blocks into "zones", where each zone 316 blocks into "zones", where each zone is a power of two number of
503 pages. This option selects the larg 317 pages. This option selects the largest power of two that the kernel
504 keeps in the memory allocator. If y 318 keeps in the memory allocator. If you need to allocate very large
505 blocks of physically contiguous memo 319 blocks of physically contiguous memory, then you may need to
506 increase this value. 320 increase this value.
507 321
508 The page size is not necessarily 4KB !! 322 This config option is actually maximum order plus one. For example,
509 when choosing a value for this optio !! 323 a value of 13 means that the largest free memory block is 2^12 pages.
510 324
511 config ARCH_IOREMAP !! 325 if SPARC64
512 bool "Enable LoongArch DMW-based iorem !! 326 source "kernel/power/Kconfig"
513 help !! 327 endif
514 We use generic TLB-based ioremap() b <<
515 protection support. However, you can <<
516 ioremap() for better performance. <<
517 <<
518 config ARCH_WRITECOMBINE <<
519 bool "Enable WriteCombine (WUC) for io <<
520 help <<
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 <<
533 328
534 config ARCH_STRICT_ALIGN !! 329 config SCHED_SMT
535 bool "Enable -mstrict-align to prevent !! 330 bool "SMT (Hyperthreading) scheduler support"
>> 331 depends on SPARC64 && SMP
536 default y 332 default y
537 help 333 help
538 Not all LoongArch cores support h/w !! 334 SMT scheduler support improves the CPU scheduler's decision making
539 -mstrict-align build parameter to pr !! 335 when dealing with SPARC cpus at a cost of slightly increased overhead
540 !! 336 in some places. If unsure say N here.
541 CPUs with h/w unaligned access suppo <<
542 Loongson-2K2000/2K3000/3A5000/3C5000 <<
543 337
544 CPUs without h/w unaligned access su !! 338 config SCHED_MC
545 Loongson-2K500/2K1000. !! 339 bool "Multi-core scheduler support"
546 !! 340 depends on SPARC64 && SMP
547 This option is enabled by default to <<
548 on all LoongArch systems. But you ca <<
549 to run kernel only on systems with h <<
550 order to optimise for performance. <<
551 <<
552 config CPU_HAS_FPU <<
553 bool <<
554 default y 341 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 342 help
560 Loongson SIMD Extension (LSX) introd !! 343 Multi-core scheduler support improves the CPU scheduler's decision
561 and a set of SIMD instructions to op !! 344 making when dealing with multi-core CPU chips at a cost of slightly
562 is enabled the kernel will support a !! 345 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 <<
567 346
568 If unsure, say Y. !! 347 config CMDLINE_BOOL
>> 348 bool "Default bootloader kernel arguments"
>> 349 depends on SPARC64
569 350
570 config CPU_HAS_LASX !! 351 config CMDLINE
571 bool "Support for the Loongson Advance !! 352 string "Initial kernel command string"
572 depends on CPU_HAS_LSX !! 353 depends on CMDLINE_BOOL
573 depends on AS_HAS_LASX_EXTENSION !! 354 default "console=ttyS0,9600 root=/dev/sda1"
574 help !! 355 help
575 Loongson Advanced SIMD Extension (LA !! 356 Say Y here if you want to be able to pass default arguments to
576 registers and a set of SIMD instruct !! 357 the kernel. This will be overridden by the bootloader, if you
577 option is enabled the kernel will su !! 358 use one (such as SILO). This is most useful if you want to boot
578 vector register contexts. If you kno !! 359 a kernel from TFTP, and want default options to be available
579 running on CPUs which do not support !! 360 with having them passed on the command line.
580 not be making use of it then you may !! 361
581 the size & complexity of your kernel !! 362 NOTE: This option WILL override the PROM bootargs setting!
>> 363
>> 364 config SUN_PM
>> 365 bool
>> 366 default y if SPARC32
>> 367 help
>> 368 Enable power management and CPU standby features on supported
>> 369 SPARC platforms.
>> 370
>> 371 config SPARC_LED
>> 372 tristate "Sun4m LED driver"
>> 373 depends on SPARC32
>> 374 help
>> 375 This driver toggles the front-panel LED on sun4m systems
>> 376 in a user-specifiable manner. Its state can be probed
>> 377 by reading /proc/led and its blinking mode can be changed
>> 378 via writes to /proc/led
>> 379
>> 380 config SERIAL_CONSOLE
>> 381 bool
>> 382 depends on SPARC32
>> 383 default y
>> 384 ---help---
>> 385 If you say Y here, it will be possible to use a serial port as the
>> 386 system console (the system console is the device which receives all
>> 387 kernel messages and warnings and which allows logins in single user
>> 388 mode). This could be useful if some terminal or printer is connected
>> 389 to that serial port.
>> 390
>> 391 Even if you say Y here, the currently visible virtual console
>> 392 (/dev/tty0) will still be used as the system console by default, but
>> 393 you can alter that using a kernel command line option such as
>> 394 "console=ttyS1". (Try "man bootparam" or see the documentation of
>> 395 your boot loader (silo) about how to pass options to the kernel at
>> 396 boot time.)
>> 397
>> 398 If you don't have a graphics card installed and you say Y here, the
>> 399 kernel will automatically use the first serial line, /dev/ttyS0, as
>> 400 system console.
>> 401
>> 402 If unsure, say N.
>> 403
>> 404 config SPARC_LEON
>> 405 bool "Sparc Leon processor family"
>> 406 depends on SPARC32
>> 407 select USB_EHCI_BIG_ENDIAN_MMIO
>> 408 select USB_EHCI_BIG_ENDIAN_DESC
>> 409 select USB_UHCI_BIG_ENDIAN_MMIO
>> 410 select USB_UHCI_BIG_ENDIAN_DESC
>> 411 ---help---
>> 412 If you say Y here if you are running on a SPARC-LEON processor.
>> 413 The LEON processor is a synthesizable VHDL model of the
>> 414 SPARC-v8 standard. LEON is part of the GRLIB collection of
>> 415 IP cores that are distributed under GPL. GRLIB can be downloaded
>> 416 from www.gaisler.com. You can download a sparc-linux cross-compilation
>> 417 toolchain at www.gaisler.com.
>> 418
>> 419 if SPARC_LEON
>> 420 menu "U-Boot options"
>> 421
>> 422 config UBOOT_LOAD_ADDR
>> 423 hex "uImage Load Address"
>> 424 default 0x40004000
>> 425 ---help---
>> 426 U-Boot kernel load address, the address in physical address space
>> 427 where u-boot will place the Linux kernel before booting it.
>> 428 This address is normally the base address of main memory + 0x4000.
>> 429
>> 430 config UBOOT_FLASH_ADDR
>> 431 hex "uImage.o Load Address"
>> 432 default 0x00080000
>> 433 ---help---
>> 434 Optional setting only affecting the uImage.o ELF-image used to
>> 435 download the uImage file to the target using a ELF-loader other than
>> 436 U-Boot. It may for example be used to download an uImage to FLASH with
>> 437 the GRMON utility before even starting u-boot.
>> 438
>> 439 config UBOOT_ENTRY_ADDR
>> 440 hex "uImage Entry Address"
>> 441 default 0xf0004000
>> 442 ---help---
>> 443 Do not change this unless you know what you're doing. This is
>> 444 hardcoded by the SPARC32 and LEON port.
582 445
583 If unsure, say Y. !! 446 This is the virtual address u-boot jumps to when booting the Linux
>> 447 Kernel.
584 448
585 config CPU_HAS_LBT !! 449 endmenu
586 bool "Support for the Loongson Binary !! 450 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. <<
593 451
594 If you want to use this feature, suc !! 452 endmenu
595 Translator (LAT), say Y. <<
596 453
597 config CPU_HAS_PREFETCH !! 454 menu "Bus options (PCI etc.)"
>> 455 config SBUS
598 bool 456 bool
599 default y 457 default y
600 458
601 config ARCH_SUPPORTS_KEXEC !! 459 config SBUSCHAR
602 def_bool y !! 460 bool
603 !! 461 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. <<
623 462
624 config RANDOMIZE_BASE !! 463 config SUN_LDOMS
625 bool "Randomize the address of the ker !! 464 bool "Sun Logical Domains support"
626 depends on RELOCATABLE !! 465 depends on SPARC64
627 help 466 help
628 Randomizes the physical and virtual !! 467 Say Y here is you want to support virtual devices via
629 kernel image is loaded, as a securi !! 468 Logical Domains.
630 deters exploit attempts relying on <<
631 of kernel internals. <<
632 469
633 The kernel will be offset by up to !! 470 config PCIC_PCI
>> 471 bool
>> 472 depends on PCI && SPARC32 && !SPARC_LEON
>> 473 default y
634 474
635 If unsure, say N. !! 475 config LEON_PCI
>> 476 bool
>> 477 depends on PCI && SPARC_LEON
>> 478 default y
636 479
637 config RANDOMIZE_BASE_MAX_OFFSET !! 480 config SPARC_GRPCI1
638 hex "Maximum KASLR offset" if EXPERT !! 481 bool "GRPCI Host Bridge Support"
639 depends on RANDOMIZE_BASE !! 482 depends on LEON_PCI
640 range 0x0 0x10000000 !! 483 default y
641 default "0x01000000" <<
642 help 484 help
643 When KASLR is active, this provides !! 485 Say Y here to include the GRPCI Host Bridge Driver. The GRPCI
644 be applied to the kernel image. It s !! 486 PCI host controller is typically found in GRLIB SPARC32/LEON
645 amount of physical RAM available in !! 487 systems. The driver has one property (all_pci_errors) controlled
>> 488 from the bootloader that makes the GRPCI to generate interrupts
>> 489 on detected PCI Parity and System errors.
646 490
647 This is limited by the size of the l !! 491 config SPARC_GRPCI2
648 !! 492 bool "GRPCI2 Host Bridge Support"
649 source "kernel/livepatch/Kconfig" !! 493 depends on LEON_PCI
650 !! 494 default y
651 config PARAVIRT <<
652 bool "Enable paravirtualization code" <<
653 depends on AS_HAS_LVZ_EXTENSION <<
654 help 495 help
655 This changes the kernel so it can mo !! 496 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 <<
659 497
660 config PARAVIRT_TIME_ACCOUNTING !! 498 config SUN_OPENPROMFS
661 bool "Paravirtual steal time accountin !! 499 tristate "Openprom tree appears in /proc/openprom"
662 depends on PARAVIRT <<
663 help 500 help
664 Select this option to enable fine gr !! 501 If you say Y, the OpenPROM device tree will be available as a
665 accounting. Time spent executing oth !! 502 virtual file system, which you can mount to /proc/openprom by "mount
666 the current vCPU is discounted from !! 503 -t openpromfs none /proc/openprom".
667 that, there can be a small performan <<
668 <<
669 If in doubt, say N here. <<
670 <<
671 endmenu <<
672 <<
673 config ARCH_SELECT_MEMORY_MODEL <<
674 def_bool y <<
675 <<
676 config ARCH_FLATMEM_ENABLE <<
677 def_bool y <<
678 depends on !NUMA <<
679 504
680 config ARCH_SPARSEMEM_ENABLE !! 505 To compile the /proc/openprom support as a module, choose M here: the
681 def_bool y !! 506 module will be called openpromfs.
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> <<
688 507
689 config ARCH_MEMORY_PROBE !! 508 Only choose N if you know in advance that you will not need to modify
690 def_bool y !! 509 OpenPROM settings on the running system.
691 depends on MEMORY_HOTPLUG <<
692 510
693 config MMU !! 511 # Makefile helpers
>> 512 config SPARC64_PCI
694 bool 513 bool
695 default y 514 default y
>> 515 depends on SPARC64 && PCI
696 516
697 config ARCH_MMAP_RND_BITS_MIN !! 517 config SPARC64_PCI_MSI
698 default 12 !! 518 bool
699 !! 519 default y
700 config ARCH_MMAP_RND_BITS_MAX !! 520 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 <<
715 521
716 config ARCH_HIBERNATION_POSSIBLE !! 522 endmenu
717 def_bool y <<
718 523
719 source "kernel/power/Kconfig" !! 524 config COMPAT
720 source "drivers/acpi/Kconfig" !! 525 bool
721 source "drivers/cpufreq/Kconfig" !! 526 depends on SPARC64
>> 527 default y
>> 528 select COMPAT_BINFMT_ELF
>> 529 select HAVE_UID16
>> 530 select ARCH_WANT_OLD_COMPAT_IPC
>> 531 select COMPAT_OLD_SIGACTION
722 532
723 endmenu !! 533 config SYSVIPC_COMPAT
>> 534 bool
>> 535 depends on COMPAT && SYSVIPC
>> 536 default y
724 537
725 source "arch/loongarch/kvm/Kconfig" !! 538 source "drivers/sbus/char/Kconfig"
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