1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 config LOONGARCH !! 2 config ALPHA
3 bool 3 bool
4 default y 4 default y
5 select ACPI !! 5 select ARCH_32BIT_USTAT_F_TINODE
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 6 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 7 select ARCH_MIGHT_HAVE_PC_PARPORT
59 select ARCH_MIGHT_HAVE_PC_SERIO 8 select ARCH_MIGHT_HAVE_PC_SERIO
60 select ARCH_SPARSEMEM_ENABLE !! 9 select ARCH_NO_PREEMPT
61 select ARCH_STACKWALK !! 10 select ARCH_NO_SG_CHAIN
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 11 select ARCH_USE_CMPXCHG_LOCKREF
71 select ARCH_USE_QUEUED_RWLOCKS !! 12 select DMA_OPS if PCI
72 select ARCH_USE_QUEUED_SPINLOCKS !! 13 select FORCE_PCI if !ALPHA_JENSEN
73 select ARCH_WANT_DEFAULT_BPF_JIT !! 14 select PCI_DOMAINS if PCI
74 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_ !! 15 select PCI_SYSCALL if PCI
75 select ARCH_WANT_LD_ORPHAN_WARN !! 16 select HAVE_ASM_MODVERSIONS
76 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEM !! 17 select HAVE_PAGE_SIZE_8KB
77 select ARCH_WANTS_NO_INSTR !! 18 select HAVE_PCSPKR_PLATFORM
78 select ARCH_WANTS_THP_SWAP if HAVE_ARC !! 19 select HAVE_PERF_EVENTS
79 select BUILDTIME_TABLE_SORT !! 20 select NEED_DMA_MAP_STATE
80 select COMMON_CLK !! 21 select NEED_SG_DMA_LENGTH
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 22 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 23 select GENERIC_PCI_IOMAP
102 select GENERIC_SCHED_CLOCK !! 24 select AUTO_IRQ_AFFINITY if SMP
>> 25 select GENERIC_IRQ_SHOW
>> 26 select ARCH_WANT_IPC_PARSE_VERSION
>> 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG
>> 28 select AUDIT_ARCH
>> 29 select GENERIC_CPU_VULNERABILITIES
103 select GENERIC_SMP_IDLE_THREAD 30 select GENERIC_SMP_IDLE_THREAD
104 select GENERIC_TIME_VSYSCALL <<
105 select GENERIC_VDSO_TIME_NS <<
106 select GPIOLIB <<
107 select HAS_IOPORT 31 select HAS_IOPORT
108 select HAVE_ARCH_AUDITSYSCALL 32 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 33 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 34 select LOCK_MM_AND_FIND_VMA
175 select MMU_GATHER_MERGE_VMAS if MMU !! 35 select MODULES_USE_ELF_RELA
176 select MODULES_USE_ELF_RELA if MODULES !! 36 select ODD_RT_SIGACTION
177 select NEED_PER_CPU_EMBED_FIRST_CHUNK !! 37 select OLD_SIGSUSPEND
178 select NEED_PER_CPU_PAGE_FIRST_CHUNK !! 38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
179 select OF !! 39 select MMU_GATHER_NO_RANGE
180 select OF_EARLY_FLATTREE !! 40 select SPARSEMEM_EXTREME if SPARSEMEM
181 select PCI !! 41 select ZONE_DMA
182 select PCI_DOMAINS_GENERIC !! 42 help
183 select PCI_ECAM if ACPI !! 43 The Alpha is a 64-bit general-purpose processor designed and
184 select PCI_LOONGSON !! 44 marketed by the Digital Equipment Corporation of blessed memory,
185 select PCI_MSI_ARCH_FALLBACKS !! 45 now Hewlett-Packard. The Alpha Linux project has a home page at
186 select PCI_QUIRKS !! 46 <http://www.alphalinux.org/>.
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 47
203 config 64BIT 48 config 64BIT
204 def_bool y 49 def_bool y
205 50
206 config GENERIC_BUG !! 51 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 52 bool
229 default y 53 default y
230 54
231 config STACKTRACE_SUPPORT !! 55 config ARCH_HAS_ILOG2_U32
232 bool 56 bool
233 default y !! 57 default n
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 <<
244 config FIX_EARLYCON_MEM <<
245 def_bool y <<
246 58
247 config PGTABLE_2LEVEL !! 59 config ARCH_HAS_ILOG2_U64
248 bool 60 bool
>> 61 default n
249 62
250 config PGTABLE_3LEVEL !! 63 config GENERIC_CALIBRATE_DELAY
251 bool 64 bool
>> 65 default y
252 66
253 config PGTABLE_4LEVEL !! 67 config GENERIC_ISA_DMA
254 bool 68 bool
>> 69 default y
255 70
256 config PGTABLE_LEVELS 71 config PGTABLE_LEVELS
257 int 72 int
258 default 2 if PGTABLE_2LEVEL !! 73 default 3
259 default 3 if PGTABLE_3LEVEL <<
260 default 4 if PGTABLE_4LEVEL <<
261 74
262 config SCHED_OMIT_FRAME_POINTER !! 75 config AUDIT_ARCH
263 bool 76 bool
264 default y <<
265 <<
266 config AS_HAS_EXPLICIT_RELOCS <<
267 def_bool $(as-instr,x:pcalau12i \$t0$( <<
268 77
269 config AS_HAS_FCSR_CLASS !! 78 menu "System setup"
270 def_bool $(as-instr,movfcsr2gr \$t0$(c <<
271 79
272 config AS_HAS_THIN_ADD_SUB !! 80 choice
273 def_bool $(cc-option,-Wa$(comma)-mthin !! 81 prompt "Alpha system type"
>> 82 default ALPHA_GENERIC
>> 83 help
>> 84 This is the system type of your hardware. A "generic" kernel will
>> 85 run on any supported Alpha system. However, if you configure a
>> 86 kernel for your specific system, it will be faster and smaller.
274 87
275 config AS_HAS_LSX_EXTENSION !! 88 To find out what type of Alpha system you have, you may want to
276 def_bool $(as-instr,vld \$vr0$(comma)\ !! 89 check out the Linux/Alpha FAQ, accessible on the WWW from
>> 90 <http://www.alphalinux.org/>. In summary:
277 91
278 config AS_HAS_LASX_EXTENSION !! 92 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
279 def_bool $(as-instr,xvld \$xr0$(comma) !! 93 Alpha-XL XL-233, XL-266
>> 94 AlphaBook1 Alpha laptop
>> 95 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
>> 96 Cabriolet AlphaPC64, AlphaPCI64
>> 97 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
>> 98 EB164 EB164 21164 evaluation board
>> 99 EB64+ EB64+ 21064 evaluation board
>> 100 EB66 EB66 21066 evaluation board
>> 101 EB66+ EB66+ 21066 evaluation board
>> 102 Jensen DECpc 150, DEC 2000 models 300, 500
>> 103 LX164 AlphaPC164-LX
>> 104 Lynx AS 2100A
>> 105 Miata Personal Workstation 433/500/600 a/au
>> 106 Marvel AlphaServer ES47 / ES80 / GS1280
>> 107 Mikasa AS 1000
>> 108 Noname AXPpci33, UDB (Multia)
>> 109 Noritake AS 1000A, AS 600A, AS 800
>> 110 PC164 AlphaPC164
>> 111 Rawhide AS 1200, AS 4000, AS 4100
>> 112 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
>> 113 SX164 AlphaPC164-SX
>> 114 Sable AS 2000, AS 2100
>> 115 Shark DS 20L
>> 116 Takara Takara (OEM)
>> 117 Titan AlphaServer ES45 / DS25 / DS15
>> 118 Wildfire AlphaServer GS 40/80/160/320
280 119
281 config AS_HAS_LBT_EXTENSION !! 120 If you don't know what to do, choose "generic".
282 def_bool $(as-instr,movscr2gr \$a0$(co <<
283 121
284 config AS_HAS_LVZ_EXTENSION !! 122 config ALPHA_GENERIC
285 def_bool $(as-instr,hvcl 0) !! 123 bool "Generic"
>> 124 depends on TTY
>> 125 select HAVE_EISA
>> 126 help
>> 127 A generic kernel will run on all supported Alpha hardware.
286 128
287 menu "Kernel type and options" !! 129 config ALPHA_ALCOR
>> 130 bool "Alcor/Alpha-XLT"
>> 131 select HAVE_EISA
>> 132 help
>> 133 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
>> 134 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
>> 135 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
>> 136 controller (256-bit memory bus) and a PCI interface. It also does
>> 137 all the work required to support an external Bcache and to maintain
>> 138 memory coherence when a PCI device DMAs into (or out of) memory.
288 139
289 source "kernel/Kconfig.hz" !! 140 config ALPHA_XL
>> 141 bool "Alpha-XL"
>> 142 help
>> 143 XL-233 and XL-266-based Alpha systems.
290 144
291 choice !! 145 config ALPHA_BOOK1
292 prompt "Page Table Layout" !! 146 bool "AlphaBook1"
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 147 help
345 This option selects 64KB page size w !! 148 Dec AlphaBook1/Burns Alpha-based laptops.
346 support a maximum of 55 bits of appl <<
347 149
348 endchoice !! 150 config ALPHA_AVANTI_CH
>> 151 bool "Avanti"
349 152
350 config CMDLINE !! 153 config ALPHA_CABRIOLET
351 string "Built-in kernel command line" !! 154 bool "Cabriolet"
352 help 155 help
353 For most platforms, the arguments fo !! 156 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
354 are provided at run-time, during boo !! 157 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
355 where either no arguments are being !! 158 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
356 arguments are insufficient or even i !! 159 Bcache SIMMs. Requires power supply with 3.3V output.
357 <<
358 When that occurs, it is possible to <<
359 line here and choose how the kernel <<
360 160
361 choice !! 161 config ALPHA_DP264
362 prompt "Kernel command line type" !! 162 bool "DP264"
363 default CMDLINE_BOOTLOADER <<
364 help 163 help
365 Choose how the kernel will handle th !! 164 Various 21264 systems with the tsunami core logic chipset.
366 line. !! 165 API Networks: 264DP, UP2000(+), CS20;
>> 166 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
367 167
368 config CMDLINE_BOOTLOADER !! 168 config ALPHA_EB164
369 bool "Use bootloader kernel arguments !! 169 bool "EB164"
370 help 170 help
371 Prefer the command-line passed by th !! 171 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
372 Use the built-in command line as fal !! 172 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
373 during boot. This is the default beh !! 173 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
374 !! 174 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
375 config CMDLINE_EXTEND !! 175 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
376 bool "Use built-in to extend bootloade !! 176 motherboard. Requires power supply with 3.3V output.
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. <<
390 177
391 endchoice !! 178 config ALPHA_EB64P_CH
>> 179 bool "EB64+"
392 180
393 config BUILTIN_DTB !! 181 config ALPHA_EB66
394 bool "Enable built-in dtb in kernel" !! 182 bool "EB66"
395 depends on OF <<
396 help 183 help
397 Some existing systems do not provide !! 184 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
398 the kernel at boot time. Let's provi !! 185 identical to EB64+. Baby PC-AT size. Runs from standard PC power
399 kernel, keyed by the dts filename, c !! 186 supply. The EB66 schematic was published as a marketing poster
>> 187 advertising the 21066 as "the first microprocessor in the world with
>> 188 embedded PCI".
400 189
401 Built-in DTBs are generic enough and !! 190 config ALPHA_EB66P
>> 191 bool "EB66+"
>> 192 help
>> 193 Later variant of the EB66 board.
402 194
403 config BUILTIN_DTB_NAME !! 195 config ALPHA_EIGER
404 string "Source file for built-in dtb" !! 196 bool "Eiger"
405 depends on BUILTIN_DTB <<
406 help 197 help
407 Base name (without suffix, relative !! 198 Apparently an obscure OEM single-board computer based on the
408 for the DTS file that will be used t !! 199 Typhoon/Tsunami chipset family. Information on it is scanty.
409 the kernel. <<
410 200
411 config DMI !! 201 config ALPHA_JENSEN
412 bool "Enable DMI scanning" !! 202 bool "Jensen"
413 select DMI_SCAN_MACHINE_NON_EFI_FALLBA !! 203 select HAVE_EISA
414 default y <<
415 help 204 help
416 This enables SMBIOS/DMI feature for !! 205 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
417 DMI to identify machine quirks. !! 206 of the first-generation Alpha systems. A number of these systems
>> 207 seem to be available on the second- hand market. The Jensen is a
>> 208 floor-standing tower system which originally used a 150MHz 21064 It
>> 209 used programmable logic to interface a 486 EISA I/O bridge to the
>> 210 CPU.
418 211
419 config EFI !! 212 config ALPHA_LX164
420 bool "EFI runtime service support" !! 213 bool "LX164"
421 select UCS2_STRING <<
422 select EFI_RUNTIME_WRAPPERS <<
423 help 214 help
424 This enables the kernel to use EFI r !! 215 A technical overview of this board is available at
425 available (such as the EFI variable !! 216 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
426 217
427 config EFI_STUB !! 218 config ALPHA_LYNX
428 bool "EFI boot stub support" !! 219 bool "Lynx"
429 default y !! 220 select HAVE_EISA
430 depends on EFI <<
431 select EFI_GENERIC_STUB <<
432 help 221 help
433 This kernel feature allows the kerne !! 222 AlphaServer 2100A-based systems.
434 EFI firmware without the use of a bo <<
435 223
436 config SCHED_SMT !! 224 config ALPHA_MARVEL
437 bool "SMT scheduler support" !! 225 bool "Marvel"
438 depends on SMP <<
439 default y <<
440 help 226 help
441 Improves scheduler's performance whe !! 227 AlphaServer ES47 / ES80 / GS1280 based on EV7.
442 threads in one physical core. <<
443 228
444 config SMP !! 229 config ALPHA_MIATA
445 bool "Multi-Processing support" !! 230 bool "Miata"
>> 231 select HAVE_EISA
446 help 232 help
447 This enables support for systems wit !! 233 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
448 a system with only one CPU, say N. I !! 234 or 600au).
449 than one CPU, say Y. <<
450 235
451 If you say N here, the kernel will r !! 236 config ALPHA_MIKASA
452 machines, but will use only one CPU !! 237 bool "Mikasa"
453 you say Y here, the kernel will run !! 238 help
454 uniprocessor machines. On a uniproce !! 239 AlphaServer 1000-based Alpha systems.
455 will run faster if you say N here. <<
456 240
457 See also the SMP-HOWTO available at !! 241 config ALPHA_NAUTILUS
>> 242 bool "Nautilus"
>> 243 help
>> 244 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
458 245
459 If you don't know what to do here, s !! 246 config ALPHA_NONAME_CH
>> 247 bool "Noname"
460 248
461 config HOTPLUG_CPU !! 249 config ALPHA_NORITAKE
462 bool "Support for hot-pluggable CPUs" !! 250 bool "Noritake"
463 depends on SMP !! 251 select HAVE_EISA
464 select GENERIC_IRQ_MIGRATION <<
465 help 252 help
466 Say Y here to allow turning CPUs off !! 253 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
467 controlled through /sys/devices/syst !! 254 systems.
468 (Note: power management support will <<
469 automatically on SMP systems. ) <<
470 Say N if you want to disable CPU hot <<
471 255
472 config NR_CPUS !! 256 config ALPHA_PC164
473 int "Maximum number of CPUs (2-256)" !! 257 bool "PC164"
474 range 2 256 !! 258
475 depends on SMP !! 259 config ALPHA_P2K
476 default "64" !! 260 bool "Platform2000"
>> 261
>> 262 config ALPHA_RAWHIDE
>> 263 bool "Rawhide"
>> 264 select HAVE_EISA
477 help 265 help
478 This allows you to specify the maxim !! 266 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
479 kernel will support. !! 267 See HOWTO at
>> 268 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
480 269
481 config NUMA !! 270 config ALPHA_RUFFIAN
482 bool "NUMA Support" !! 271 bool "Ruffian"
483 select SMP <<
484 help 272 help
485 Say Y to compile the kernel with NUM !! 273 Samsung APC164UX. There is a page on known problems and workarounds
486 support. This option improves perfo !! 274 at <http://www.alphalinux.org/faq/FAQ-11.html>.
487 than one NUMA node; on single node s <<
488 to leave it disabled. <<
489 275
490 config NODES_SHIFT !! 276 config ALPHA_RX164
491 int !! 277 bool "RX164"
492 default "6" <<
493 depends on NUMA <<
494 278
495 config ARCH_FORCE_MAX_ORDER !! 279 config ALPHA_SX164
496 int "Maximum zone order" !! 280 bool "SX164"
497 default "13" if PAGE_SIZE_64KB !! 281
498 default "11" if PAGE_SIZE_16KB !! 282 config ALPHA_SABLE
499 default "10" !! 283 bool "Sable"
>> 284 select HAVE_EISA
500 help 285 help
501 The kernel memory allocator divides !! 286 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. <<
507 287
508 The page size is not necessarily 4KB !! 288 config ALPHA_SHARK
509 when choosing a value for this optio !! 289 bool "Shark"
510 290
511 config ARCH_IOREMAP !! 291 config ALPHA_TAKARA
512 bool "Enable LoongArch DMW-based iorem !! 292 bool "Takara"
513 help 293 help
514 We use generic TLB-based ioremap() b !! 294 Alpha 11164-based OEM single-board computer.
515 protection support. However, you can <<
516 ioremap() for better performance. <<
517 295
518 config ARCH_WRITECOMBINE !! 296 config ALPHA_TITAN
519 bool "Enable WriteCombine (WUC) for io !! 297 bool "Titan"
520 help 298 help
521 LoongArch maintains cache coherency !! 299 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). <<
526 300
527 This means WUC can only used for wri !! 301 config ALPHA_WILDFIRE
528 this option is disabled by default, !! 302 bool "Wildfire"
529 SUC for ioremap(). You can enable th !! 303 help
530 to run on hardware without this bug. !! 304 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
531 305
532 You can override this setting via wr !! 306 endchoice
533 307
534 config ARCH_STRICT_ALIGN !! 308 # clear all implied options (don't want default values for those):
535 bool "Enable -mstrict-align to prevent !! 309 # Most of these machines have ISA slots; not exactly sure which don't,
>> 310 # and this doesn't activate hordes of code, so do it always.
>> 311 config ISA
>> 312 bool
536 default y 313 default y
537 help 314 help
538 Not all LoongArch cores support h/w !! 315 Find out whether you have ISA slots on your motherboard. ISA is the
539 -mstrict-align build parameter to pr !! 316 name of a bus system, i.e. the way the CPU talks to the other stuff
>> 317 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 318 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 319 newer boards don't support it. If you have ISA, say Y, otherwise N.
540 320
541 CPUs with h/w unaligned access suppo !! 321 config ISA_DMA_API
542 Loongson-2K2000/2K3000/3A5000/3C5000 !! 322 bool
>> 323 default y
543 324
544 CPUs without h/w unaligned access su !! 325 config ALPHA_NONAME
545 Loongson-2K500/2K1000. !! 326 bool
>> 327 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
>> 328 default y
>> 329 help
>> 330 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
>> 331 UDB). This design was produced by Digital's Technical OEM (TOEM)
>> 332 group. It uses the 21066 processor running at 166MHz or 233MHz. It
>> 333 is a baby-AT size, and runs from a standard PC power supply. It has
>> 334 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
>> 335 2 versions, with either PS/2 or large DIN connectors for the
>> 336 keyboard.
>> 337
>> 338 config ALPHA_EV4
>> 339 bool
>> 340 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
>> 341 default y if !ALPHA_LYNX
>> 342 default y if !ALPHA_EV5
546 343
547 This option is enabled by default to !! 344 config ALPHA_LCA
548 on all LoongArch systems. But you ca !! 345 bool
549 to run kernel only on systems with h !! 346 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
550 order to optimise for performance. !! 347 default y
551 348
552 config CPU_HAS_FPU !! 349 config ALPHA_APECS
553 bool 350 bool
>> 351 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
554 default y 352 default y
555 353
556 config CPU_HAS_LSX !! 354 config ALPHA_EB64P
557 bool "Support for the Loongson SIMD Ex !! 355 bool
558 depends on AS_HAS_LSX_EXTENSION !! 356 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
>> 357 default y
559 help 358 help
560 Loongson SIMD Extension (LSX) introd !! 359 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
561 and a set of SIMD instructions to op !! 360 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
562 is enabled the kernel will support a !! 361 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
563 vector register contexts. If you kno !! 362 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
564 running on CPUs which do not support !! 363 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
565 not be making use of it then you may !! 364 Runs from standard PC power supply.
566 the size & complexity of your kernel !! 365
>> 366 config ALPHA_EV5
>> 367 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
>> 368 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
>> 369
>> 370 config ALPHA_CIA
>> 371 bool
>> 372 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
>> 373 default y
>> 374
>> 375 config ALPHA_EV56
>> 376 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
>> 377 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
>> 378
>> 379 config ALPHA_EV56
>> 380 prompt "EV56 CPU (speed >= 333MHz)?"
>> 381 depends on ALPHA_NORITAKE || ALPHA_PRIMO
567 382
568 If unsure, say Y. !! 383 config ALPHA_EV56
>> 384 prompt "EV56 CPU (speed >= 400MHz)?"
>> 385 depends on ALPHA_RAWHIDE
569 386
570 config CPU_HAS_LASX !! 387 config ALPHA_PRIMO
571 bool "Support for the Loongson Advance !! 388 bool "EV5 CPU daughtercard (model 5/xxx)?"
572 depends on CPU_HAS_LSX !! 389 depends on ALPHA_NORITAKE || ALPHA_MIKASA
573 depends on AS_HAS_LASX_EXTENSION <<
574 help 390 help
575 Loongson Advanced SIMD Extension (LA !! 391 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
576 registers and a set of SIMD instruct !! 392
577 option is enabled the kernel will su !! 393 config ALPHA_GAMMA
578 vector register contexts. If you kno !! 394 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_SABLE
579 running on CPUs which do not support !! 395 depends on ALPHA_SABLE || ALPHA_LYNX
580 not be making use of it then you may !! 396 default ALPHA_LYNX
581 the size & complexity of your kernel !! 397 help
>> 398 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
>> 399
>> 400 config ALPHA_T2
>> 401 bool
>> 402 depends on ALPHA_SABLE || ALPHA_LYNX
>> 403 default y
>> 404
>> 405 config ALPHA_PYXIS
>> 406 bool
>> 407 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
>> 408 default y
>> 409
>> 410 config ALPHA_EV6
>> 411 bool
>> 412 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
>> 413 default y
582 414
583 If unsure, say Y. !! 415 config ALPHA_TSUNAMI
>> 416 bool
>> 417 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
>> 418 default y
584 419
585 config CPU_HAS_LBT !! 420 config ALPHA_EV67
586 bool "Support for the Loongson Binary !! 421 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
587 depends on AS_HAS_LBT_EXTENSION !! 422 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
588 help 423 help
589 Loongson Binary Translation (LBT) in !! 424 Is this a machine based on the EV67 core? If in doubt, select N here
590 to SCR3), x86/ARM eflags (eflags) an !! 425 and the machine will be treated as an EV6.
591 Enabling this option allows the kern <<
592 specific to LBT. <<
593 426
594 If you want to use this feature, suc !! 427 config ALPHA_MCPCIA
595 Translator (LAT), say Y. !! 428 bool
>> 429 depends on ALPHA_RAWHIDE
>> 430 default y
596 431
597 config CPU_HAS_PREFETCH !! 432 config ALPHA_POLARIS
598 bool 433 bool
>> 434 depends on ALPHA_RX164
599 default y 435 default y
600 436
601 config ARCH_SUPPORTS_KEXEC !! 437 config ALPHA_IRONGATE
602 def_bool y !! 438 bool
>> 439 depends on ALPHA_NAUTILUS
>> 440 default y
603 441
604 config ARCH_SUPPORTS_CRASH_DUMP !! 442 config GENERIC_HWEIGHT
605 def_bool y !! 443 bool
>> 444 default y if !ALPHA_EV67
606 445
607 config ARCH_SELECTS_CRASH_DUMP !! 446 config ALPHA_AVANTI
608 def_bool y !! 447 bool
609 depends on CRASH_DUMP !! 448 depends on ALPHA_XL || ALPHA_AVANTI_CH
610 select RELOCATABLE !! 449 default y
>> 450 help
>> 451 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
>> 452 Alphas. Info at
>> 453 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
611 454
612 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO !! 455 config ALPHA_BROKEN_IRQ_MASK
613 def_bool CRASH_RESERVE !! 456 bool
>> 457 depends on ALPHA_GENERIC || ALPHA_PC164
>> 458 default y
614 459
615 config RELOCATABLE !! 460 config VGA_HOSE
616 bool "Relocatable kernel" !! 461 bool
617 select ARCH_HAS_RELR !! 462 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
>> 463 default y
618 help 464 help
619 This builds the kernel as a Position !! 465 Support VGA on an arbitrary hose; needed for several platforms
620 which retains all relocation metadat !! 466 which always have multiple hoses, and whose consoles support it.
621 the kernel binary at runtime to a di !! 467
622 its link address. <<
623 468
624 config RANDOMIZE_BASE !! 469 config ALPHA_QEMU
625 bool "Randomize the address of the ker !! 470 bool "Run under QEMU emulation"
626 depends on RELOCATABLE !! 471 depends on !ALPHA_GENERIC
627 help 472 help
628 Randomizes the physical and virtual !! 473 Assume the presence of special features supported by QEMU PALcode
629 kernel image is loaded, as a securi !! 474 that reduce the overhead of system emulation.
630 deters exploit attempts relying on <<
631 of kernel internals. <<
632 475
633 The kernel will be offset by up to !! 476 Generic kernels will auto-detect QEMU. But when building a
>> 477 system-specific kernel, the assumption is that we want to
>> 478 eliminate as many runtime tests as possible.
634 479
635 If unsure, say N. !! 480 If unsure, say N.
636 481
637 config RANDOMIZE_BASE_MAX_OFFSET !! 482
638 hex "Maximum KASLR offset" if EXPERT !! 483 config ALPHA_SRM
639 depends on RANDOMIZE_BASE !! 484 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
640 range 0x0 0x10000000 !! 485 depends on TTY
641 default "0x01000000" !! 486 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
642 help 487 help
643 When KASLR is active, this provides !! 488 There are two different types of booting firmware on Alphas: SRM,
644 be applied to the kernel image. It s !! 489 which is command line driven, and ARC, which uses menus and arrow
645 amount of physical RAM available in !! 490 keys. Details about the Linux/Alpha booting process are contained in
>> 491 the Linux/Alpha FAQ, accessible on the WWW from
>> 492 <http://www.alphalinux.org/>.
646 493
647 This is limited by the size of the l !! 494 The usual way to load Linux on an Alpha machine is to use MILO
>> 495 (a bootloader that lets you pass command line parameters to the
>> 496 kernel just like lilo does for the x86 architecture) which can be
>> 497 loaded either from ARC or can be installed directly as a permanent
>> 498 firmware replacement from floppy (which requires changing a certain
>> 499 jumper on the motherboard). If you want to do either of these, say N
>> 500 here. If MILO doesn't work on your system (true for Jensen
>> 501 motherboards), you can bypass it altogether and boot Linux directly
>> 502 from an SRM console; say Y here in order to do that. Note that you
>> 503 won't be able to boot from an IDE disk using SRM.
648 504
649 source "kernel/livepatch/Kconfig" !! 505 If unsure, say N.
650 506
651 config PARAVIRT !! 507 config ARCH_MAY_HAVE_PC_FDC
652 bool "Enable paravirtualization code" !! 508 def_bool y
653 depends on AS_HAS_LVZ_EXTENSION <<
654 help <<
655 This changes the kernel so it can mo <<
656 under a hypervisor, potentially impr <<
657 over full virtualization. However, <<
658 the kernel is theoretically slower a <<
659 509
660 config PARAVIRT_TIME_ACCOUNTING !! 510 config SMP
661 bool "Paravirtual steal time accountin !! 511 bool "Symmetric multi-processing support"
662 depends on PARAVIRT !! 512 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
663 help 513 help
664 Select this option to enable fine gr !! 514 This enables support for systems with more than one CPU. If you have
665 accounting. Time spent executing oth !! 515 a system with only one CPU, say N. If you have a system with more
666 the current vCPU is discounted from !! 516 than one CPU, say Y.
667 that, there can be a small performan <<
668 517
669 If in doubt, say N here. !! 518 If you say N here, the kernel will run on uni- and multiprocessor
>> 519 machines, but will use only one CPU of a multiprocessor machine. If
>> 520 you say Y here, the kernel will run on many, but not all,
>> 521 uniprocessor machines. On a uniprocessor machine, the kernel
>> 522 will run faster if you say N here.
670 523
671 endmenu !! 524 See also the SMP-HOWTO available at
>> 525 <https://www.tldp.org/docs.html#howto>.
672 526
673 config ARCH_SELECT_MEMORY_MODEL !! 527 If you don't know what to do here, say N.
674 def_bool y <<
675 528
676 config ARCH_FLATMEM_ENABLE !! 529 config NR_CPUS
677 def_bool y !! 530 int "Maximum number of CPUs (2-32)"
678 depends on !NUMA !! 531 range 2 32
>> 532 depends on SMP
>> 533 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
>> 534 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
>> 535 help
>> 536 MARVEL support can handle a maximum of 32 CPUs, all the others
>> 537 with working support have a maximum of 4 CPUs.
679 538
680 config ARCH_SPARSEMEM_ENABLE 539 config ARCH_SPARSEMEM_ENABLE
681 def_bool y !! 540 bool "Sparse Memory Support"
682 select SPARSEMEM_VMEMMAP_ENABLE <<
683 help 541 help
684 Say Y to support efficient handling !! 542 Say Y to support efficient handling of discontiguous physical memory,
685 for architectures which are either N !! 543 for systems that have huge holes in the physical address space.
686 or have huge holes in the physical a <<
687 See <file:Documentation/mm/numa.rst> <<
688 544
689 config ARCH_MEMORY_PROBE !! 545 config ALPHA_WTINT
690 def_bool y !! 546 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
691 depends on MEMORY_HOTPLUG !! 547 default y if ALPHA_QEMU
>> 548 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
>> 549 default n if !ALPHA_SRM && !ALPHA_GENERIC
>> 550 default y if SMP
>> 551 help
>> 552 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
>> 553 to sleep until the next interrupt. This may reduce the power
>> 554 consumed, and the heat produced by the computer. However, it has
>> 555 the side effect of making the cycle counter unreliable as a timing
>> 556 device across the sleep.
692 557
693 config MMU !! 558 For emulation under QEMU, definitely say Y here, as we have other
>> 559 mechanisms for measuring time than the cycle counter.
>> 560
>> 561 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
>> 562 MILO, sleep mode is not supported so you might as well say N here.
>> 563
>> 564 For SMP systems we cannot use the cycle counter for timing anyway,
>> 565 so you might as well say Y here.
>> 566
>> 567 If unsure, say N.
>> 568
>> 569 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
>> 570 config ALPHA_LARGE_VMALLOC
694 bool 571 bool
695 default y !! 572 help
>> 573 Process creation and other aspects of virtual memory management can
>> 574 be streamlined if we restrict the kernel to one PGD for all vmalloc
>> 575 allocations. This equates to about 8GB.
696 576
697 config ARCH_MMAP_RND_BITS_MIN !! 577 Under normal circumstances, this is so far and above what is needed
698 default 12 !! 578 as to be laughable. However, there are certain applications (such
>> 579 as benchmark-grade in-kernel web serving) that can make use of as
>> 580 much vmalloc space as is available.
699 581
700 config ARCH_MMAP_RND_BITS_MAX !! 582 Say N unless you know you need gobs and gobs of vmalloc space.
701 default 18 <<
702 583
703 config ARCH_SUPPORTS_UPROBES !! 584 config VERBOSE_MCHECK
704 def_bool y !! 585 bool "Verbose Machine Checks"
705 586
706 config KASAN_SHADOW_OFFSET !! 587 config VERBOSE_MCHECK_ON
707 hex !! 588 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
708 default 0x0 !! 589 depends on VERBOSE_MCHECK
709 depends on KASAN !! 590 default 1
>> 591 help
>> 592 This option allows the default printing mode to be set, and then
>> 593 possibly overridden by a boot command argument.
710 594
711 menu "Power management options" !! 595 For example, if one wanted the option of printing verbose
>> 596 machine checks, but wanted the default to be as if verbose
>> 597 machine check printing was turned off, then one would choose
>> 598 the printing mode to be 0. Then, upon reboot, one could add
>> 599 the boot command line "verbose_mcheck=1" to get the normal
>> 600 verbose machine check printing, or "verbose_mcheck=2" to get
>> 601 the maximum information available.
712 602
713 config ARCH_SUSPEND_POSSIBLE !! 603 Take the default (1) unless you want more control or more info.
714 def_bool y <<
715 604
716 config ARCH_HIBERNATION_POSSIBLE !! 605 choice
717 def_bool y !! 606 prompt "Timer interrupt frequency (HZ)?"
>> 607 default HZ_128 if ALPHA_QEMU
>> 608 default HZ_1200 if ALPHA_RAWHIDE
>> 609 default HZ_1024
>> 610 help
>> 611 The frequency at which timer interrupts occur. A high frequency
>> 612 minimizes latency, whereas a low frequency minimizes overhead of
>> 613 process accounting. The later effect is especially significant
>> 614 when being run under QEMU.
>> 615
>> 616 Note that some Alpha hardware cannot change the interrupt frequency
>> 617 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
>> 618
>> 619 config HZ_32
>> 620 bool "32 Hz"
>> 621 config HZ_64
>> 622 bool "64 Hz"
>> 623 config HZ_128
>> 624 bool "128 Hz"
>> 625 config HZ_256
>> 626 bool "256 Hz"
>> 627 config HZ_1024
>> 628 bool "1024 Hz"
>> 629 config HZ_1200
>> 630 bool "1200 Hz"
>> 631 endchoice
718 632
719 source "kernel/power/Kconfig" !! 633 config HZ
720 source "drivers/acpi/Kconfig" !! 634 int
721 source "drivers/cpufreq/Kconfig" !! 635 default 32 if HZ_32
>> 636 default 64 if HZ_64
>> 637 default 128 if HZ_128
>> 638 default 256 if HZ_256
>> 639 default 1200 if HZ_1200
>> 640 default 1024
>> 641
>> 642 config SRM_ENV
>> 643 tristate "SRM environment through procfs"
>> 644 depends on PROC_FS
>> 645 help
>> 646 If you enable this option, a subdirectory inside /proc called
>> 647 /proc/srm_environment will give you access to the all important
>> 648 SRM environment variables (those which have a name) and also
>> 649 to all others (by their internal number).
>> 650
>> 651 SRM is something like a BIOS for Alpha machines. There are some
>> 652 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 653 support (hey, that's not SRM!).
>> 654
>> 655 Despite the fact that this driver doesn't work on all Alphas (but
>> 656 only on those which have SRM as their firmware), it's save to
>> 657 build it even if your particular machine doesn't know about SRM
>> 658 (or if you intend to compile a generic kernel). It will simply
>> 659 not create those subdirectory in /proc (and give you some warning,
>> 660 of course).
>> 661
>> 662 This driver is also available as a module and will be called
>> 663 srm_env then.
722 664
723 endmenu 665 endmenu
724 666
725 source "arch/loongarch/kvm/Kconfig" !! 667 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
>> 668 # but we also need it if VGA_HOSE is set
>> 669 config DUMMY_CONSOLE
>> 670 bool
>> 671 depends on VGA_HOSE
>> 672 default y
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