1 # SPDX-License-Identifier: GPL-2.0 !! 1 #
2 config LOONGARCH !! 2 # For a description of the syntax of this configuration file,
>> 3 # see Documentation/kbuild/kconfig-language.txt.
>> 4 #
>> 5 config ALPHA
3 bool 6 bool
4 default y 7 default y
5 select ACPI !! 8 help
6 select ACPI_GENERIC_GSI if ACPI !! 9 The Alpha is a 64-bit general-purpose processor designed and
7 select ACPI_MCFG if ACPI !! 10 marketed by the Digital Equipment Corporation of blessed memory,
8 select ACPI_HOTPLUG_CPU if ACPI_PROCES !! 11 now Hewlett-Packard. The Alpha Linux project has a home page at
9 select ACPI_PPTT if ACPI !! 12 <http://www.alphalinux.org/>.
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 <<
60 select ARCH_SPARSEMEM_ENABLE <<
61 select ARCH_STACKWALK <<
62 select ARCH_SUPPORTS_ACPI <<
63 select ARCH_SUPPORTS_ATOMIC_RMW <<
64 select ARCH_SUPPORTS_HUGETLBFS <<
65 select ARCH_SUPPORTS_INT128 if CC_HAS_ <<
66 select ARCH_SUPPORTS_LTO_CLANG <<
67 select ARCH_SUPPORTS_LTO_CLANG_THIN <<
68 select ARCH_SUPPORTS_NUMA_BALANCING <<
69 select ARCH_USE_BUILTIN_BSWAP <<
70 select ARCH_USE_CMPXCHG_LOCKREF <<
71 select ARCH_USE_QUEUED_RWLOCKS <<
72 select ARCH_USE_QUEUED_SPINLOCKS <<
73 select ARCH_WANT_DEFAULT_BPF_JIT <<
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 <<
95 select GENERIC_LIB_ASHLDI3 <<
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 <<
102 select GENERIC_SCHED_CLOCK <<
103 select GENERIC_SMP_IDLE_THREAD <<
104 select GENERIC_TIME_VSYSCALL <<
105 select GENERIC_VDSO_TIME_NS <<
106 select GPIOLIB <<
107 select HAS_IOPORT <<
108 select HAVE_ARCH_AUDITSYSCALL <<
109 select HAVE_ARCH_JUMP_LABEL <<
110 select HAVE_ARCH_JUMP_LABEL_RELATIVE <<
111 select HAVE_ARCH_KASAN <<
112 select HAVE_ARCH_KFENCE <<
113 select HAVE_ARCH_KGDB if PERF_EVENTS <<
114 select HAVE_ARCH_MMAP_RND_BITS if MMU <<
115 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS <<
116 select HAVE_ARCH_SECCOMP <<
117 select HAVE_ARCH_SECCOMP_FILTER <<
118 select HAVE_ARCH_TRACEHOOK <<
119 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 <<
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 <<
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 <<
170 select HAVE_TIF_NOHZ <<
171 select HAVE_VIRT_CPU_ACCOUNTING_GEN if <<
172 select IRQ_FORCED_THREADING <<
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 <<
190 select SYSCTL_ARCH_UNALIGN_ALLOW <<
191 select SYSCTL_ARCH_UNALIGN_NO_WARN <<
192 select SYSCTL_EXCEPTION_TRACE <<
193 select SWIOTLB <<
194 select TRACE_IRQFLAGS_SUPPORT <<
195 select USE_PERCPU_NUMA_NODE_ID <<
196 select USER_STACKTRACE_SUPPORT <<
197 select VDSO_GETRANDOM <<
198 select ZONE_DMA32 <<
199 <<
200 config 32BIT <<
201 bool <<
202 13
203 config 64BIT 14 config 64BIT
204 def_bool y 15 def_bool y
205 16
206 config GENERIC_BUG !! 17 config MMU
207 def_bool y <<
208 depends on BUG <<
209 <<
210 config GENERIC_BUG_RELATIVE_POINTERS <<
211 def_bool y <<
212 depends on GENERIC_BUG <<
213 <<
214 config GENERIC_CALIBRATE_DELAY <<
215 def_bool y <<
216 <<
217 config GENERIC_CSUM <<
218 def_bool y <<
219 <<
220 config GENERIC_HWEIGHT <<
221 def_bool y <<
222 <<
223 config L1_CACHE_SHIFT <<
224 int <<
225 default "6" <<
226 <<
227 config LOCKDEP_SUPPORT <<
228 bool 18 bool
229 default y 19 default y
230 20
231 config STACKTRACE_SUPPORT !! 21 config UID16
232 bool 22 bool
233 default y <<
234 <<
235 # MACH_LOONGSON32 and MACH_LOONGSON64 are deli <<
236 # MIPS Loongson code, to preserve Loongson-spe <<
237 # are shared between architectures, and specif <<
238 config MACH_LOONGSON32 <<
239 def_bool 32BIT <<
240 <<
241 config MACH_LOONGSON64 <<
242 def_bool 64BIT <<
243 23
244 config FIX_EARLYCON_MEM !! 24 config RWSEM_GENERIC_SPINLOCK
245 def_bool y <<
246 <<
247 config PGTABLE_2LEVEL <<
248 bool 25 bool
249 26
250 config PGTABLE_3LEVEL !! 27 config RWSEM_XCHGADD_ALGORITHM
251 bool 28 bool
>> 29 default y
252 30
253 config PGTABLE_4LEVEL !! 31 config GENERIC_ISA_DMA
254 bool <<
255 <<
256 config PGTABLE_LEVELS <<
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 32 bool
264 default y 33 default y
265 34
266 config AS_HAS_EXPLICIT_RELOCS !! 35 source "init/Kconfig"
267 def_bool $(as-instr,x:pcalau12i \$t0$( <<
268 <<
269 config AS_HAS_FCSR_CLASS <<
270 def_bool $(as-instr,movfcsr2gr \$t0$(c <<
271 36
272 config AS_HAS_THIN_ADD_SUB <<
273 def_bool $(cc-option,-Wa$(comma)-mthin <<
274 37
275 config AS_HAS_LSX_EXTENSION !! 38 menu "System setup"
276 def_bool $(as-instr,vld \$vr0$(comma)\ <<
277 39
278 config AS_HAS_LASX_EXTENSION !! 40 choice
279 def_bool $(as-instr,xvld \$xr0$(comma) !! 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.
280 47
281 config AS_HAS_LBT_EXTENSION !! 48 To find out what type of Alpha system you have, you may want to
282 def_bool $(as-instr,movscr2gr \$a0$(co !! 49 check out the Linux/Alpha FAQ, accessible on the WWW from
>> 50 <http://www.alphalinux.org/>. In summary:
283 51
284 config AS_HAS_LVZ_EXTENSION !! 52 Alcor/Alpha-XLT AS 600
285 def_bool $(as-instr,hvcl 0) !! 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
286 81
287 menu "Kernel type and options" !! 82 If you don't know what to do, choose "generic".
288 83
289 source "kernel/Kconfig.hz" !! 84 config ALPHA_GENERIC
>> 85 bool "Generic"
>> 86 help
>> 87 A generic kernel will run on all supported Alpha hardware.
290 88
291 choice !! 89 config ALPHA_ALCOR
292 prompt "Page Table Layout" !! 90 bool "Alcor/Alpha-XLT"
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 91 help
345 This option selects 64KB page size w !! 92 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
346 support a maximum of 55 bits of appl !! 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.
347 98
348 endchoice !! 99 config ALPHA_XL
>> 100 bool "Alpha-XL"
>> 101 help
>> 102 XL-233 and XL-266-based Alpha systems.
349 103
350 config CMDLINE !! 104 config ALPHA_BOOK1
351 string "Built-in kernel command line" !! 105 bool "AlphaBook1"
352 help 106 help
353 For most platforms, the arguments fo !! 107 Dec AlphaBook1/Burns Alpha-based laptops.
354 are provided at run-time, during boo <<
355 where either no arguments are being <<
356 arguments are insufficient or even i <<
357 108
358 When that occurs, it is possible to !! 109 config ALPHA_AVANTI_CH
359 line here and choose how the kernel !! 110 bool "Avanti"
360 111
361 choice !! 112 config ALPHA_CABRIOLET
362 prompt "Kernel command line type" !! 113 bool "Cabriolet"
363 default CMDLINE_BOOTLOADER <<
364 help 114 help
365 Choose how the kernel will handle th !! 115 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
366 line. !! 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.
367 119
368 config CMDLINE_BOOTLOADER !! 120 config ALPHA_DP264
369 bool "Use bootloader kernel arguments !! 121 bool "DP264"
370 help 122 help
371 Prefer the command-line passed by th !! 123 Various 21264 systems with the tsunami core logic chipset.
372 Use the built-in command line as fal !! 124 API Networks: 264DP, UP2000(+), CS20;
373 during boot. This is the default beh !! 125 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
374 <<
375 config CMDLINE_EXTEND <<
376 bool "Use built-in to extend bootloade <<
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 <<
383 config CMDLINE_FORCE <<
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. <<
390 126
391 endchoice !! 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+"
392 139
393 config BUILTIN_DTB !! 140 config ALPHA_EB66
394 bool "Enable built-in dtb in kernel" !! 141 bool "EB66"
395 depends on OF <<
396 help 142 help
397 Some existing systems do not provide !! 143 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
398 the kernel at boot time. Let's provi !! 144 identical to EB64+. Baby PC-AT size. Runs from standard PC power
399 kernel, keyed by the dts filename, c !! 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".
400 148
401 Built-in DTBs are generic enough and !! 149 config ALPHA_EB66P
>> 150 bool "EB66+"
>> 151 help
>> 152 Later variant of the EB66 board.
402 153
403 config BUILTIN_DTB_NAME !! 154 config ALPHA_EIGER
404 string "Source file for built-in dtb" !! 155 bool "Eiger"
405 depends on BUILTIN_DTB <<
406 help 156 help
407 Base name (without suffix, relative !! 157 Apparently an obscure OEM single-board computer based on the
408 for the DTS file that will be used t !! 158 Typhoon/Tsunami chipset family. Information on it is scanty.
409 the kernel. <<
410 159
411 config DMI !! 160 config ALPHA_JENSEN
412 bool "Enable DMI scanning" !! 161 bool "Jensen"
413 select DMI_SCAN_MACHINE_NON_EFI_FALLBA <<
414 default y <<
415 help 162 help
416 This enables SMBIOS/DMI feature for !! 163 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
417 DMI to identify machine quirks. !! 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.
418 169
419 config EFI !! 170 config ALPHA_LX164
420 bool "EFI runtime service support" !! 171 bool "LX164"
421 select UCS2_STRING <<
422 select EFI_RUNTIME_WRAPPERS <<
423 help 172 help
424 This enables the kernel to use EFI r !! 173 A technical overview of this board is available at
425 available (such as the EFI variable !! 174 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
426 175
427 config EFI_STUB !! 176 config ALPHA_LYNX
428 bool "EFI boot stub support" !! 177 bool "Lynx"
429 default y <<
430 depends on EFI <<
431 select EFI_GENERIC_STUB <<
432 help 178 help
433 This kernel feature allows the kerne !! 179 AlphaServer 2100A-based systems.
434 EFI firmware without the use of a bo <<
435 180
436 config SCHED_SMT !! 181 config ALPHA_MARVEL
437 bool "SMT scheduler support" !! 182 bool "Marvel"
438 depends on SMP <<
439 default y <<
440 help 183 help
441 Improves scheduler's performance whe !! 184 AlphaServer ES47 / ES80 / GS1280 based on EV7.
442 threads in one physical core. <<
443 185
444 config SMP !! 186 config ALPHA_MIATA
445 bool "Multi-Processing support" !! 187 bool "Miata"
446 help 188 help
447 This enables support for systems wit !! 189 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
448 a system with only one CPU, say N. I !! 190 or 600au). There is an Installation HOWTO for this hardware at
449 than one CPU, say Y. !! 191 <http://members.brabant.chello.nl/~s.vandereijk/miata.html>.
450 192
451 If you say N here, the kernel will r !! 193 config ALPHA_MIKASA
452 machines, but will use only one CPU !! 194 bool "Mikasa"
453 you say Y here, the kernel will run !! 195 help
454 uniprocessor machines. On a uniproce !! 196 AlphaServer 1000-based Alpha systems.
455 will run faster if you say N here. <<
456 197
457 See also the SMP-HOWTO available at !! 198 config ALPHA_NAUTILUS
>> 199 bool "Nautilus"
>> 200 help
>> 201 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
458 202
459 If you don't know what to do here, s !! 203 config ALPHA_NONAME_CH
>> 204 bool "Noname"
460 205
461 config HOTPLUG_CPU !! 206 config ALPHA_NORITAKE
462 bool "Support for hot-pluggable CPUs" !! 207 bool "Noritake"
463 depends on SMP <<
464 select GENERIC_IRQ_MIGRATION <<
465 help 208 help
466 Say Y here to allow turning CPUs off !! 209 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
467 controlled through /sys/devices/syst !! 210 systems.
468 (Note: power management support will <<
469 automatically on SMP systems. ) <<
470 Say N if you want to disable CPU hot <<
471 211
472 config NR_CPUS !! 212 config ALPHA_PC164
473 int "Maximum number of CPUs (2-256)" !! 213 bool "PC164"
474 range 2 256 !! 214
475 depends on SMP !! 215 config ALPHA_P2K
476 default "64" !! 216 bool "Platform2000"
>> 217
>> 218 config ALPHA_RAWHIDE
>> 219 bool "Rawhide"
477 help 220 help
478 This allows you to specify the maxim !! 221 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
479 kernel will support. !! 222 See HOWTO at
>> 223 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
480 224
481 config NUMA !! 225 config ALPHA_RUFFIAN
482 bool "NUMA Support" !! 226 bool "Ruffian"
483 select SMP <<
484 help 227 help
485 Say Y to compile the kernel with NUM !! 228 Samsung APC164UX. There is a page on known problems and workarounds
486 support. This option improves perfo !! 229 at <http://www.alphalinux.org/faq/FAQ-11.html>.
487 than one NUMA node; on single node s !! 230
488 to leave it disabled. !! 231 config ALPHA_RX164
>> 232 bool "RX164"
489 233
490 config NODES_SHIFT !! 234 config ALPHA_SX164
491 int !! 235 bool "SX164"
492 default "6" <<
493 depends on NUMA <<
494 236
495 config ARCH_FORCE_MAX_ORDER !! 237 config ALPHA_SABLE
496 int "Maximum zone order" !! 238 bool "Sable"
497 default "13" if PAGE_SIZE_64KB <<
498 default "11" if PAGE_SIZE_16KB <<
499 default "10" <<
500 help 239 help
501 The kernel memory allocator divides !! 240 Digital AlphaServer 2000 and 2100-based systems.
502 blocks into "zones", where each zone <<
503 pages. This option selects the larg <<
504 keeps in the memory allocator. If y <<
505 blocks of physically contiguous memo <<
506 increase this value. <<
507 241
508 The page size is not necessarily 4KB !! 242 config ALPHA_SHARK
509 when choosing a value for this optio !! 243 bool "Shark"
510 244
511 config ARCH_IOREMAP !! 245 config ALPHA_TAKARA
512 bool "Enable LoongArch DMW-based iorem !! 246 bool "Takara"
513 help 247 help
514 We use generic TLB-based ioremap() b !! 248 Alpha 11164-based OEM single-board computer.
515 protection support. However, you can <<
516 ioremap() for better performance. <<
517 249
518 config ARCH_WRITECOMBINE !! 250 config ALPHA_TITAN
519 bool "Enable WriteCombine (WUC) for io !! 251 bool "Titan"
520 help 252 help
521 LoongArch maintains cache coherency !! 253 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
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). <<
526 254
527 This means WUC can only used for wri !! 255 config ALPHA_WILDFIRE
528 this option is disabled by default, !! 256 bool "Wildfire"
529 SUC for ioremap(). You can enable th !! 257 help
530 to run on hardware without this bug. !! 258 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
531 259
532 You can override this setting via wr !! 260 endchoice
533 261
534 config ARCH_STRICT_ALIGN !! 262 # clear all implied options (don't want default values for those):
535 bool "Enable -mstrict-align to prevent !! 263 # Most of these machines have ISA slots; not exactly sure which don't,
>> 264 # and this doesn't activate hordes of code, so do it always.
>> 265 config ISA
>> 266 bool
536 default y 267 default y
537 help 268 help
538 Not all LoongArch cores support h/w !! 269 Find out whether you have ISA slots on your motherboard. ISA is the
539 -mstrict-align build parameter to pr !! 270 name of a bus system, i.e. the way the CPU talks to the other stuff
>> 271 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 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.
540 274
541 CPUs with h/w unaligned access suppo !! 275 config PCI
542 Loongson-2K2000/2K3000/3A5000/3C5000 !! 276 bool
>> 277 depends on !ALPHA_JENSEN
>> 278 default y
>> 279 help
>> 280 Find out whether you have a PCI motherboard. PCI is the name of a
>> 281 bus system, i.e. the way the CPU talks to the other stuff inside
>> 282 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
>> 283 VESA. If you have PCI, say Y, otherwise N.
543 284
544 CPUs without h/w unaligned access su !! 285 The PCI-HOWTO, available from
545 Loongson-2K500/2K1000. !! 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.
546 289
547 This option is enabled by default to !! 290 config PCI_DOMAINS
548 on all LoongArch systems. But you ca !! 291 bool
549 to run kernel only on systems with h !! 292 default y
550 order to optimise for performance. <<
551 293
552 config CPU_HAS_FPU !! 294 config ALPHA_CORE_AGP
553 bool 295 bool
>> 296 depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL
554 default y 297 default y
555 298
556 config CPU_HAS_LSX !! 299 config ALPHA_NONAME
557 bool "Support for the Loongson SIMD Ex !! 300 bool
558 depends on AS_HAS_LSX_EXTENSION !! 301 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
>> 302 default y
559 help 303 help
560 Loongson SIMD Extension (LSX) introd !! 304 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
561 and a set of SIMD instructions to op !! 305 UDB). This design was produced by Digital's Technical OEM (TOEM)
562 is enabled the kernel will support a !! 306 group. It uses the 21066 processor running at 166MHz or 233MHz. It
563 vector register contexts. If you kno !! 307 is a baby-AT size, and runs from a standard PC power supply. It has
564 running on CPUs which do not support !! 308 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
565 not be making use of it then you may !! 309 2 versions, with either PS/2 or large DIN connectors for the
566 the size & complexity of your kernel !! 310 keyboard.
567 311
568 If unsure, say Y. !! 312 config ALPHA_EV4
>> 313 bool
>> 314 depends on ALPHA_JENSEN || (ALPHA_SABLE && !ALPHA_GAMMA) || ALPHA_LYNX || ALPHA_NORITAKE && !ALPHA_PRIMO || ALPHA_MIKASA && !ALPHA_PRIMO || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL || ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
>> 315 default y if !ALPHA_LYNX
569 316
570 config CPU_HAS_LASX !! 317 config ALPHA_LCA
571 bool "Support for the Loongson Advance !! 318 bool
572 depends on CPU_HAS_LSX !! 319 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
573 depends on AS_HAS_LASX_EXTENSION !! 320 default y
574 help <<
575 Loongson Advanced SIMD Extension (LA <<
576 registers and a set of SIMD instruct <<
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 <<
582 321
583 If unsure, say Y. !! 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
584 326
585 config CPU_HAS_LBT !! 327 config ALPHA_EB64P
586 bool "Support for the Loongson Binary !! 328 bool
587 depends on AS_HAS_LBT_EXTENSION !! 329 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
>> 330 default y
588 help 331 help
589 Loongson Binary Translation (LBT) in !! 332 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
590 to SCR3), x86/ARM eflags (eflags) an !! 333 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
591 Enabling this option allows the kern !! 334 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
592 specific to LBT. !! 335 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
>> 336 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
>> 337 Runs from standard PC power supply.
593 338
594 If you want to use this feature, suc !! 339 config ALPHA_EV5
595 Translator (LAT), say Y. !! 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
596 342
597 config CPU_HAS_PREFETCH !! 343 config ALPHA_EV4
598 bool 344 bool
599 default y !! 345 default y if ALPHA_LYNX && !ALPHA_EV5
600 346
601 config ARCH_SUPPORTS_KEXEC !! 347 config ALPHA_CIA
602 def_bool y !! 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
>> 350 default y
603 351
604 config ARCH_SUPPORTS_CRASH_DUMP !! 352 config ALPHA_EV56
605 def_bool y !! 353 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
>> 354 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
606 355
607 config ARCH_SELECTS_CRASH_DUMP !! 356 config ALPHA_EV56
608 def_bool y !! 357 prompt "EV56 CPU (speed >= 333MHz)?"
609 depends on CRASH_DUMP !! 358 depends on ALPHA_NORITAKE && ALPHA_PRIMO
610 select RELOCATABLE <<
611 359
612 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO !! 360 config ALPHA_EV56
613 def_bool CRASH_RESERVE !! 361 prompt "EV56 CPU (speed >= 400MHz)?"
>> 362 depends on ALPHA_RAWHIDE
614 363
615 config RELOCATABLE !! 364 config ALPHA_PRIMO
616 bool "Relocatable kernel" !! 365 bool "EV5 CPU daughtercard (model 5/xxx)?"
617 select ARCH_HAS_RELR !! 366 depends on ALPHA_NORITAKE || ALPHA_MIKASA
618 help 367 help
619 This builds the kernel as a Position !! 368 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
620 which retains all relocation metadat <<
621 the kernel binary at runtime to a di <<
622 its link address. <<
623 369
624 config RANDOMIZE_BASE !! 370 config ALPHA_GAMMA
625 bool "Randomize the address of the ker !! 371 bool "EV5 CPU(s) (model 5/xxx)?"
626 depends on RELOCATABLE !! 372 depends on ALPHA_SABLE
627 help 373 help
628 Randomizes the physical and virtual !! 374 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
629 kernel image is loaded, as a securi <<
630 deters exploit attempts relying on <<
631 of kernel internals. <<
632 375
633 The kernel will be offset by up to !! 376 config ALPHA_GAMMA
>> 377 bool
>> 378 depends on ALPHA_LYNX
>> 379 default y
634 380
635 If unsure, say N. !! 381 config ALPHA_T2
>> 382 bool
>> 383 depends on ALPHA_SABLE || ALPHA_LYNX
>> 384 default y
636 385
637 config RANDOMIZE_BASE_MAX_OFFSET !! 386 config ALPHA_PYXIS
638 hex "Maximum KASLR offset" if EXPERT !! 387 bool
639 depends on RANDOMIZE_BASE !! 388 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
640 range 0x0 0x10000000 !! 389 default y
641 default "0x01000000" <<
642 help <<
643 When KASLR is active, this provides <<
644 be applied to the kernel image. It s <<
645 amount of physical RAM available in <<
646 390
647 This is limited by the size of the l !! 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
648 395
649 source "kernel/livepatch/Kconfig" !! 396 config ALPHA_TSUNAMI
>> 397 bool
>> 398 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
>> 399 default y
650 400
651 config PARAVIRT !! 401 config ALPHA_EV67
652 bool "Enable paravirtualization code" !! 402 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
653 depends on AS_HAS_LVZ_EXTENSION !! 403 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
654 help 404 help
655 This changes the kernel so it can mo !! 405 Is this a machine based on the EV67 core? If in doubt, select N here
656 under a hypervisor, potentially impr !! 406 and the machine will be treated as an EV6.
657 over full virtualization. However, <<
658 the kernel is theoretically slower a <<
659 407
660 config PARAVIRT_TIME_ACCOUNTING !! 408 config ALPHA_EV7
661 bool "Paravirtual steal time accountin !! 409 bool
662 depends on PARAVIRT !! 410 depends on ALPHA_MARVEL
>> 411 default y
>> 412
>> 413 config ALPHA_MCPCIA
>> 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
>> 422
>> 423 config ALPHA_IRONGATE
>> 424 bool
>> 425 depends on ALPHA_NAUTILUS
>> 426 default y
>> 427
>> 428 config ALPHA_AVANTI
>> 429 bool
>> 430 depends on ALPHA_XL || ALPHA_AVANTI_CH
>> 431 default y
663 help 432 help
664 Select this option to enable fine gr !! 433 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
665 accounting. Time spent executing oth !! 434 Alphas. Info at
666 the current vCPU is discounted from !! 435 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
667 that, there can be a small performan <<
668 436
669 If in doubt, say N here. !! 437 config ALPHA_BROKEN_IRQ_MASK
>> 438 bool
>> 439 depends on ALPHA_GENERIC || ALPHA_PC164
>> 440 default y
670 441
671 endmenu !! 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 config ARCH_SELECT_MEMORY_MODEL !! 452 The usual way to load Linux on an Alpha machine is to use MILO
674 def_bool y !! 453 (a bootloader that lets you pass command line parameters to the
>> 454 kernel just like lilo does for the x86 architecture) which can be
>> 455 loaded either from ARC or can be installed directly as a permanent
>> 456 firmware replacement from floppy (which requires changing a certain
>> 457 jumper on the motherboard). If you want to do either of these, say N
>> 458 here. If MILO doesn't work on your system (true for Jensen
>> 459 motherboards), you can bypass it altogether and boot Linux directly
>> 460 from an SRM console; say Y here in order to do that. Note that you
>> 461 won't be able to boot from an IDE disk using SRM.
675 462
676 config ARCH_FLATMEM_ENABLE !! 463 If unsure, say N.
677 def_bool y <<
678 depends on !NUMA <<
679 464
680 config ARCH_SPARSEMEM_ENABLE !! 465 config EARLY_PRINTK
681 def_bool y !! 466 bool
682 select SPARSEMEM_VMEMMAP_ENABLE !! 467 depends on ALPHA_GENERIC || ALPHA_SRM
>> 468 default y
>> 469
>> 470 config EISA
>> 471 bool
>> 472 depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
>> 473 default y
>> 474
>> 475 config SMP
>> 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>.
>> 502
>> 503 If you don't know what to do here, say N.
>> 504
>> 505 config HAVE_DEC_LOCK
>> 506 bool
>> 507 depends on SMP
>> 508 default y
>> 509
>> 510 config NR_CPUS
>> 511 int "Maximum number of CPUs (2-64)"
>> 512 depends on SMP
>> 513 default "64"
>> 514
>> 515 config DISCONTIGMEM
>> 516 bool "Discontiguous Memory Support (EXPERIMENTAL)"
>> 517 depends on EXPERIMENTAL
683 help 518 help
684 Say Y to support efficient handling !! 519 Say Y to upport efficient handling of discontiguous physical memory,
685 for architectures which are either N 520 for architectures which are either NUMA (Non-Uniform Memory Access)
686 or have huge holes in the physical a 521 or have huge holes in the physical address space for other reasons.
687 See <file:Documentation/mm/numa.rst> !! 522 See <file:Documentation/vm/numa> for more.
688 523
689 config ARCH_MEMORY_PROBE !! 524 config NUMA
690 def_bool y !! 525 bool "NUMA Support (EXPERIMENTAL)"
691 depends on MEMORY_HOTPLUG !! 526 depends on DISCONTIGMEM
>> 527 help
>> 528 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
>> 529 Access). This option is for configuring high-end multiprocessor
>> 530 server machines. If in doubt, say N.
>> 531
>> 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.
>> 539
>> 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.
>> 544
>> 545 Say N unless you know you need gobs and gobs of vmalloc space.
>> 546
>> 547 config VERBOSE_MCHECK
>> 548 bool "Verbose Machine Checks"
>> 549
>> 550 config VERBOSE_MCHECK_ON
>> 551 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
>> 552 depends on VERBOSE_MCHECK
>> 553 default 1
>> 554 ---help---
>> 555 This option allows the default printing mode to be set, and then
>> 556 possibly overridden by a boot command argument.
>> 557
>> 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.
>> 565
>> 566 Take the default (1) unless you want more control or more info.
>> 567
>> 568 source "drivers/pci/Kconfig"
>> 569 source "drivers/eisa/Kconfig"
>> 570
>> 571 config HOTPLUG
>> 572 bool "Support for hot-pluggable devices"
>> 573 ---help---
>> 574 Say Y here if you want to plug devices into your computer while
>> 575 the system is running, and be able to use them quickly. In many
>> 576 cases, the devices can likewise be unplugged at any time too.
>> 577
>> 578 One well known example of this is PCMCIA- or PC-cards, credit-card
>> 579 size devices such as network cards, modems or hard drives which are
>> 580 plugged into slots found on all modern laptop computers. Another
>> 581 example, used on modern desktops as well as laptops, is USB.
>> 582
>> 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.
>> 588
>> 589 source "drivers/pcmcia/Kconfig"
>> 590
>> 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).
>> 599
>> 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!).
>> 603
>> 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).
692 610
693 config MMU !! 611 This driver is also available as a module and will be called
>> 612 srm_env then.
>> 613
>> 614 source "fs/Kconfig.binfmt"
>> 615
>> 616 source "drivers/parport/Kconfig"
>> 617
>> 618 endmenu
>> 619
>> 620 source "drivers/base/Kconfig"
>> 621
>> 622 source "drivers/mtd/Kconfig"
>> 623
>> 624 source "drivers/pnp/Kconfig"
>> 625
>> 626 source "drivers/block/Kconfig"
>> 627
>> 628 source "drivers/md/Kconfig"
>> 629
>> 630 source "drivers/ide/Kconfig"
>> 631
>> 632 source "drivers/scsi/Kconfig"
>> 633
>> 634 if PCI
>> 635 source "drivers/message/fusion/Kconfig"
>> 636 endif
>> 637
>> 638 source "drivers/ieee1394/Kconfig"
>> 639
>> 640 source "net/Kconfig"
>> 641
>> 642 source "drivers/isdn/Kconfig"
>> 643
>> 644 source "drivers/cdrom/Kconfig"
>> 645
>> 646 source "drivers/input/Kconfig"
>> 647
>> 648 source "drivers/char/Kconfig"
>> 649
>> 650 #source drivers/misc/Config.in
>> 651 source "drivers/media/Kconfig"
>> 652
>> 653 source "fs/Kconfig"
>> 654
>> 655 source "drivers/video/Kconfig"
>> 656
>> 657 source "sound/Kconfig"
>> 658
>> 659 source "drivers/usb/Kconfig"
>> 660
>> 661 source "arch/alpha/oprofile/Kconfig"
>> 662
>> 663 menu "Kernel hacking"
>> 664
>> 665 config ALPHA_LEGACY_START_ADDRESS
>> 666 bool "Legacy kernel start address"
>> 667 depends on ALPHA_GENERIC
>> 668 default n
>> 669 ---help---
>> 670 The 2.4 kernel changed the kernel start address from 0x310000
>> 671 to 0x810000 to make room for the Wildfire's larger SRM console.
>> 672 Recent consoles on Titan and Marvel machines also require the
>> 673 extra room.
>> 674
>> 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.
>> 680
>> 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
694 bool 685 bool
>> 686 depends on !ALPHA_GENERIC && !ALPHA_TITAN && !ALPHA_MARVEL && !ALPHA_WILDFIRE
695 default y 687 default y
696 688
697 config ARCH_MMAP_RND_BITS_MIN !! 689 config DEBUG_KERNEL
698 default 12 !! 690 bool "Kernel debugging"
>> 691 help
>> 692 Say Y here if you are developing drivers or trying to debug and
>> 693 identify kernel problems.
699 694
700 config ARCH_MMAP_RND_BITS_MAX !! 695 config MATHEMU
701 default 18 !! 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.
702 702
703 config ARCH_SUPPORTS_UPROBES !! 703 config DEBUG_SLAB
704 def_bool y !! 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.
705 710
706 config KASAN_SHADOW_OFFSET !! 711 config MAGIC_SYSRQ
707 hex !! 712 bool "Magic SysRq key"
708 default 0x0 !! 713 depends on DEBUG_KERNEL
709 depends on KASAN !! 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.
710 724
711 menu "Power management options" !! 725 config DEBUG_SPINLOCK
>> 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.
712 733
713 config ARCH_SUSPEND_POSSIBLE !! 734 config DEBUG_RWLOCK
714 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.
715 742
716 config ARCH_HIBERNATION_POSSIBLE !! 743 config DEBUG_SEMAPHORE
717 def_bool y !! 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.
718 750
719 source "kernel/power/Kconfig" !! 751 config DEBUG_INFO
720 source "drivers/acpi/Kconfig" !! 752 bool "Compile the kernel with debug info"
721 source "drivers/cpufreq/Kconfig" !! 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.
722 759
723 endmenu 760 endmenu
724 761
725 source "arch/loongarch/kvm/Kconfig" !! 762 source "security/Kconfig"
>> 763
>> 764 source "crypto/Kconfig"
>> 765
>> 766 source "lib/Kconfig"
>> 767
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