1 # SPDX-License-Identifier: GPL-2.0 !! 1 #
2 config MMU !! 2 # For a description of the syntax of this configuration file,
3 def_bool y !! 3 # see Documentation/kbuild/kconfig-language.txt.
>> 4 #
4 5
5 config CPU_BIG_ENDIAN !! 6 mainmenu "Linux Kernel Configuration"
6 def_bool y <<
7 7
8 config LOCKDEP_SUPPORT !! 8 config X86
9 def_bool y !! 9 bool
>> 10 default y
>> 11 help
>> 12 This is Linux's home port. Linux was originally native to the Intel
>> 13 386, and runs on all the later x86 processors including the Intel
>> 14 486, 586, Pentiums, and various instruction-set-compatible chips by
>> 15 AMD, Cyrix, and others.
10 16
11 config STACKTRACE_SUPPORT !! 17 config MMU
12 def_bool y !! 18 bool
13 !! 19 default y
14 config ARCH_HAS_ILOG2_U32 <<
15 def_bool n <<
16 <<
17 config ARCH_HAS_ILOG2_U64 <<
18 def_bool n <<
19 <<
20 config ARCH_PROC_KCORE_TEXT <<
21 def_bool y <<
22 <<
23 config GENERIC_HWEIGHT <<
24 def_bool !HAVE_MARCH_Z196_FEATURES <<
25 <<
26 config GENERIC_BUG <<
27 def_bool y if BUG <<
28 <<
29 config GENERIC_BUG_RELATIVE_POINTERS <<
30 def_bool y <<
31 <<
32 config GENERIC_LOCKBREAK <<
33 def_bool y if PREEMPTION <<
34 <<
35 config PGSTE <<
36 def_bool y if KVM <<
37 <<
38 config AUDIT_ARCH <<
39 def_bool y <<
40 <<
41 config NO_IOPORT_MAP <<
42 def_bool y <<
43 <<
44 config PCI_QUIRKS <<
45 def_bool n <<
46 <<
47 config ARCH_SUPPORTS_UPROBES <<
48 def_bool y <<
49 <<
50 config KASAN_SHADOW_OFFSET <<
51 hex <<
52 depends on KASAN <<
53 default 0x1C000000000000 <<
54 <<
55 config S390 <<
56 def_bool y <<
57 # <<
58 # Note: keep this list sorted alphabet <<
59 # <<
60 imply IMA_SECURE_AND_OR_TRUSTED_BOOT <<
61 select ALTERNATE_USER_ADDRESS_SPACE <<
62 select ARCH_32BIT_USTAT_F_TINODE <<
63 select ARCH_BINFMT_ELF_STATE <<
64 select ARCH_CORRECT_STACKTRACE_ON_KRET <<
65 select ARCH_ENABLE_MEMORY_HOTPLUG if S <<
66 select ARCH_ENABLE_MEMORY_HOTREMOVE <<
67 select ARCH_ENABLE_SPLIT_PMD_PTLOCK if <<
68 select ARCH_HAS_CURRENT_STACK_POINTER <<
69 select ARCH_HAS_DEBUG_VIRTUAL <<
70 select ARCH_HAS_DEBUG_VM_PGTABLE <<
71 select ARCH_HAS_DEBUG_WX <<
72 select ARCH_HAS_DEVMEM_IS_ALLOWED <<
73 select ARCH_HAS_DMA_OPS if PCI <<
74 select ARCH_HAS_ELF_RANDOMIZE <<
75 select ARCH_HAS_FORCE_DMA_UNENCRYPTED <<
76 select ARCH_HAS_FORTIFY_SOURCE <<
77 select ARCH_HAS_GCOV_PROFILE_ALL <<
78 select ARCH_HAS_GIGANTIC_PAGE <<
79 select ARCH_HAS_KCOV <<
80 select ARCH_HAS_MEMBARRIER_SYNC_CORE <<
81 select ARCH_HAS_MEM_ENCRYPT <<
82 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS <<
83 select ARCH_HAS_PTE_SPECIAL <<
84 select ARCH_HAS_SCALED_CPUTIME <<
85 select ARCH_HAS_SET_DIRECT_MAP <<
86 select ARCH_HAS_SET_MEMORY <<
87 select ARCH_HAS_STRICT_KERNEL_RWX <<
88 select ARCH_HAS_STRICT_MODULE_RWX <<
89 select ARCH_HAS_SYSCALL_WRAPPER <<
90 select ARCH_HAS_UBSAN <<
91 select ARCH_HAS_VDSO_DATA <<
92 select ARCH_HAVE_NMI_SAFE_CMPXCHG <<
93 select ARCH_INLINE_READ_LOCK <<
94 select ARCH_INLINE_READ_LOCK_BH <<
95 select ARCH_INLINE_READ_LOCK_IRQ <<
96 select ARCH_INLINE_READ_LOCK_IRQSAVE <<
97 select ARCH_INLINE_READ_TRYLOCK <<
98 select ARCH_INLINE_READ_UNLOCK <<
99 select ARCH_INLINE_READ_UNLOCK_BH <<
100 select ARCH_INLINE_READ_UNLOCK_IRQ <<
101 select ARCH_INLINE_READ_UNLOCK_IRQREST <<
102 select ARCH_INLINE_SPIN_LOCK <<
103 select ARCH_INLINE_SPIN_LOCK_BH <<
104 select ARCH_INLINE_SPIN_LOCK_IRQ <<
105 select ARCH_INLINE_SPIN_LOCK_IRQSAVE <<
106 select ARCH_INLINE_SPIN_TRYLOCK <<
107 select ARCH_INLINE_SPIN_TRYLOCK_BH <<
108 select ARCH_INLINE_SPIN_UNLOCK <<
109 select ARCH_INLINE_SPIN_UNLOCK_BH <<
110 select ARCH_INLINE_SPIN_UNLOCK_IRQ <<
111 select ARCH_INLINE_SPIN_UNLOCK_IRQREST <<
112 select ARCH_INLINE_WRITE_LOCK <<
113 select ARCH_INLINE_WRITE_LOCK_BH <<
114 select ARCH_INLINE_WRITE_LOCK_IRQ <<
115 select ARCH_INLINE_WRITE_LOCK_IRQSAVE <<
116 select ARCH_INLINE_WRITE_TRYLOCK <<
117 select ARCH_INLINE_WRITE_UNLOCK <<
118 select ARCH_INLINE_WRITE_UNLOCK_BH <<
119 select ARCH_INLINE_WRITE_UNLOCK_IRQ <<
120 select ARCH_INLINE_WRITE_UNLOCK_IRQRES <<
121 select ARCH_MHP_MEMMAP_ON_MEMORY_ENABL <<
122 select ARCH_STACKWALK <<
123 select ARCH_SUPPORTS_ATOMIC_RMW <<
124 select ARCH_SUPPORTS_DEBUG_PAGEALLOC <<
125 select ARCH_SUPPORTS_HUGETLBFS <<
126 select ARCH_SUPPORTS_INT128 if CC_HAS_ <<
127 select ARCH_SUPPORTS_NUMA_BALANCING <<
128 select ARCH_SUPPORTS_PER_VMA_LOCK <<
129 select ARCH_USE_BUILTIN_BSWAP <<
130 select ARCH_USE_CMPXCHG_LOCKREF <<
131 select ARCH_USE_SYM_ANNOTATIONS <<
132 select ARCH_WANTS_NO_INSTR <<
133 select ARCH_WANT_DEFAULT_BPF_JIT <<
134 select ARCH_WANT_IPC_PARSE_VERSION <<
135 select ARCH_WANT_KERNEL_PMD_MKWRITE <<
136 select ARCH_WANT_LD_ORPHAN_WARN <<
137 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEM <<
138 select BUILDTIME_TABLE_SORT <<
139 select CLONE_BACKWARDS2 <<
140 select DCACHE_WORD_ACCESS if !KMSAN <<
141 select DYNAMIC_FTRACE if FUNCTION_TRAC <<
142 select FUNCTION_ALIGNMENT_8B if CC_IS_ <<
143 select FUNCTION_ALIGNMENT_16B if !CC_I <<
144 select GENERIC_ALLOCATOR <<
145 select GENERIC_CPU_DEVICES <<
146 select GENERIC_CPU_AUTOPROBE <<
147 select GENERIC_CPU_VULNERABILITIES <<
148 select GENERIC_ENTRY <<
149 select GENERIC_GETTIMEOFDAY <<
150 select GENERIC_PTDUMP <<
151 select GENERIC_SMP_IDLE_THREAD <<
152 select GENERIC_TIME_VSYSCALL <<
153 select GENERIC_VDSO_TIME_NS <<
154 select GENERIC_IOREMAP if PCI <<
155 select HAVE_ALIGNED_STRUCT_PAGE <<
156 select HAVE_ARCH_AUDITSYSCALL <<
157 select HAVE_ARCH_JUMP_LABEL <<
158 select HAVE_ARCH_JUMP_LABEL_RELATIVE <<
159 select HAVE_ARCH_KASAN <<
160 select HAVE_ARCH_KASAN_VMALLOC <<
161 select HAVE_ARCH_KCSAN <<
162 select HAVE_ARCH_KMSAN <<
163 select HAVE_ARCH_KFENCE <<
164 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS <<
165 select HAVE_ARCH_SECCOMP_FILTER <<
166 select HAVE_ARCH_SOFT_DIRTY <<
167 select HAVE_ARCH_STACKLEAK <<
168 select HAVE_ARCH_TRACEHOOK <<
169 select HAVE_ARCH_TRANSPARENT_HUGEPAGE <<
170 select HAVE_ARCH_VMAP_STACK <<
171 select HAVE_ASM_MODVERSIONS <<
172 select HAVE_CMPXCHG_DOUBLE <<
173 select HAVE_CMPXCHG_LOCAL <<
174 select HAVE_DEBUG_KMEMLEAK <<
175 select HAVE_DMA_CONTIGUOUS <<
176 select HAVE_DYNAMIC_FTRACE <<
177 select HAVE_DYNAMIC_FTRACE_WITH_ARGS <<
178 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT <<
179 select HAVE_DYNAMIC_FTRACE_WITH_REGS <<
180 select HAVE_EBPF_JIT if HAVE_MARCH_Z19 <<
181 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
182 select HAVE_GUP_FAST <<
183 select HAVE_FENTRY <<
184 select HAVE_FTRACE_MCOUNT_RECORD <<
185 select HAVE_FUNCTION_ARG_ACCESS_API <<
186 select HAVE_FUNCTION_ERROR_INJECTION <<
187 select HAVE_FUNCTION_GRAPH_RETVAL <<
188 select HAVE_FUNCTION_GRAPH_TRACER <<
189 select HAVE_FUNCTION_TRACER <<
190 select HAVE_GCC_PLUGINS <<
191 select HAVE_GENERIC_VDSO <<
192 select HAVE_IOREMAP_PROT if PCI <<
193 select HAVE_KERNEL_BZIP2 <<
194 select HAVE_KERNEL_GZIP <<
195 select HAVE_KERNEL_LZ4 <<
196 select HAVE_KERNEL_LZMA <<
197 select HAVE_KERNEL_LZO <<
198 select HAVE_KERNEL_UNCOMPRESSED <<
199 select HAVE_KERNEL_XZ <<
200 select HAVE_KERNEL_ZSTD <<
201 select HAVE_KPROBES <<
202 select HAVE_KPROBES_ON_FTRACE <<
203 select HAVE_KRETPROBES <<
204 select HAVE_LIVEPATCH <<
205 select HAVE_MEMBLOCK_PHYS_MAP <<
206 select HAVE_MOD_ARCH_SPECIFIC <<
207 select HAVE_NMI <<
208 select HAVE_NOP_MCOUNT <<
209 select HAVE_PAGE_SIZE_4KB <<
210 select HAVE_PCI <<
211 select HAVE_PERF_EVENTS <<
212 select HAVE_PERF_REGS <<
213 select HAVE_PERF_USER_STACK_DUMP <<
214 select HAVE_REGS_AND_STACK_ACCESS_API <<
215 select HAVE_RELIABLE_STACKTRACE <<
216 select HAVE_RETHOOK <<
217 select HAVE_RSEQ <<
218 select HAVE_SAMPLE_FTRACE_DIRECT <<
219 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI <<
220 select HAVE_SETUP_PER_CPU_AREA <<
221 select HAVE_SOFTIRQ_ON_OWN_STACK <<
222 select HAVE_SYSCALL_TRACEPOINTS <<
223 select HAVE_VIRT_CPU_ACCOUNTING <<
224 select HAVE_VIRT_CPU_ACCOUNTING_IDLE <<
225 select IOMMU_HELPER if PCI <<
226 select IOMMU_SUPPORT if PCI <<
227 select MMU_GATHER_MERGE_VMAS <<
228 select MMU_GATHER_NO_GATHER <<
229 select MMU_GATHER_RCU_TABLE_FREE <<
230 select MODULES_USE_ELF_RELA <<
231 select NEED_DMA_MAP_STATE if PCI <<
232 select NEED_PER_CPU_EMBED_FIRST_CHUNK <<
233 select NEED_SG_DMA_LENGTH if PCI <<
234 select OLD_SIGACTION <<
235 select OLD_SIGSUSPEND3 <<
236 select PCI_DOMAINS if PCI <<
237 select PCI_MSI if PCI <<
238 select PCI_MSI_ARCH_FALLBACKS if PCI <<
239 select SPARSE_IRQ <<
240 select SWIOTLB <<
241 select SYSCTL_EXCEPTION_TRACE <<
242 select THREAD_INFO_IN_TASK <<
243 select TRACE_IRQFLAGS_SUPPORT <<
244 select TTY <<
245 select USER_STACKTRACE_SUPPORT <<
246 select VDSO_GETRANDOM <<
247 select VIRT_CPU_ACCOUNTING <<
248 select ZONE_DMA <<
249 # Note: keep the above list sorted alp <<
250 20
251 config SCHED_OMIT_FRAME_POINTER !! 21 config SBUS
252 def_bool y !! 22 bool
253 23
254 config PGTABLE_LEVELS !! 24 config UID16
255 int !! 25 bool
256 default 5 !! 26 default y
257 27
258 source "kernel/livepatch/Kconfig" !! 28 config GENERIC_ISA_DMA
>> 29 bool
>> 30 default y
259 31
260 config ARCH_SUPPORTS_KEXEC !! 32 source "init/Kconfig"
261 def_bool y <<
262 33
263 config ARCH_SUPPORTS_KEXEC_FILE <<
264 def_bool y <<
265 34
266 config ARCH_SUPPORTS_KEXEC_SIG !! 35 menu "Processor type and features"
267 def_bool MODULE_SIG_FORMAT <<
268 36
269 config ARCH_SUPPORTS_KEXEC_PURGATORY !! 37 choice
270 def_bool y !! 38 prompt "Subarchitecture Type"
>> 39 default X86_PC
271 40
272 config ARCH_SUPPORTS_CRASH_DUMP !! 41 config X86_PC
273 def_bool y !! 42 bool "PC-compatible"
274 help 43 help
275 Refer to <file:Documentation/arch/s3 !! 44 Choose this option if your computer is a standard PC or compatible.
276 This option also enables s390 zfcpdu <<
277 See also <file:Documentation/arch/s3 <<
278 45
279 menu "Processor type and features" !! 46 config X86_VOYAGER
>> 47 bool "Voyager (NCR)"
>> 48 help
>> 49 Voyager is a MCA based 32 way capable SMP architecture proprietary
>> 50 to NCR Corp. Machine classes 345x/35xx/4100/51xx are voyager based.
>> 51
>> 52 *** WARNING ***
>> 53
>> 54 If you do not specifically know you have a Voyager based machine,
>> 55 say N here otherwise the kernel you build will not be bootable.
280 56
281 config HAVE_MARCH_Z10_FEATURES !! 57 config X86_NUMAQ
282 def_bool n !! 58 bool "NUMAQ (IBM/Sequent)"
>> 59 help
>> 60 This option is used for getting Linux to run on a (IBM/Sequent) NUMA
>> 61 multiquad box. This changes the way that processors are bootstrapped,
>> 62 and uses Clustered Logical APIC addressing mode instead of Flat Logical.
>> 63 You will need a new lynxer.elf file to flash your firmware with - send
>> 64 email to Martin.Bligh@us.ibm.com
283 65
284 config HAVE_MARCH_Z196_FEATURES !! 66 config X86_SUMMIT
285 def_bool n !! 67 bool "Summit/EXA (IBM x440)"
286 select HAVE_MARCH_Z10_FEATURES !! 68 depends on SMP
287 !! 69 help
288 config HAVE_MARCH_ZEC12_FEATURES !! 70 This option is needed for IBM systems that use the Summit/EXA chipset.
289 def_bool n !! 71 In particular, it is needed for the x440.
290 select HAVE_MARCH_Z196_FEATURES <<
291 <<
292 config HAVE_MARCH_Z13_FEATURES <<
293 def_bool n <<
294 select HAVE_MARCH_ZEC12_FEATURES <<
295 <<
296 config HAVE_MARCH_Z14_FEATURES <<
297 def_bool n <<
298 select HAVE_MARCH_Z13_FEATURES <<
299 <<
300 config HAVE_MARCH_Z15_FEATURES <<
301 def_bool n <<
302 select HAVE_MARCH_Z14_FEATURES <<
303 <<
304 config HAVE_MARCH_Z16_FEATURES <<
305 def_bool n <<
306 select HAVE_MARCH_Z15_FEATURES <<
307 72
308 choice !! 73 If you don't have one of these computers, you should say N here.
309 prompt "Processor type" <<
310 default MARCH_Z196 <<
311 74
312 config MARCH_Z10 !! 75 config X86_BIGSMP
313 bool "IBM System z10" !! 76 bool "Support for other sub-arch SMP systems with more than 8 CPUs"
314 select HAVE_MARCH_Z10_FEATURES !! 77 depends on SMP
315 depends on $(cc-option,-march=z10) <<
316 help <<
317 Select this to enable optimizations <<
318 series). This is the oldest machine <<
319 <<
320 config MARCH_Z196 <<
321 bool "IBM zEnterprise 114 and 196" <<
322 select HAVE_MARCH_Z196_FEATURES <<
323 depends on $(cc-option,-march=z196) <<
324 help <<
325 Select this to enable optimizations <<
326 (2818 and 2817 series). The kernel w <<
327 not work on older machines. <<
328 <<
329 config MARCH_ZEC12 <<
330 bool "IBM zBC12 and zEC12" <<
331 select HAVE_MARCH_ZEC12_FEATURES <<
332 depends on $(cc-option,-march=zEC12) <<
333 help <<
334 Select this to enable optimizations <<
335 2827 series). The kernel will be sli <<
336 older machines. <<
337 <<
338 config MARCH_Z13 <<
339 bool "IBM z13s and z13" <<
340 select HAVE_MARCH_Z13_FEATURES <<
341 depends on $(cc-option,-march=z13) <<
342 help <<
343 Select this to enable optimizations <<
344 2964 series). The kernel will be sli <<
345 older machines. <<
346 <<
347 config MARCH_Z14 <<
348 bool "IBM z14 ZR1 and z14" <<
349 select HAVE_MARCH_Z14_FEATURES <<
350 depends on $(cc-option,-march=z14) <<
351 help <<
352 Select this to enable optimizations <<
353 and 3906 series). The kernel will be <<
354 work on older machines. <<
355 <<
356 config MARCH_Z15 <<
357 bool "IBM z15" <<
358 select HAVE_MARCH_Z15_FEATURES <<
359 depends on $(cc-option,-march=z15) <<
360 help <<
361 Select this to enable optimizations <<
362 and 8561 series). The kernel will be <<
363 work on older machines. <<
364 <<
365 config MARCH_Z16 <<
366 bool "IBM z16" <<
367 select HAVE_MARCH_Z16_FEATURES <<
368 depends on $(cc-option,-march=z16) <<
369 help 78 help
370 Select this to enable optimizations !! 79 This option is needed for the systems that have more than 8 CPUs
371 3932 series). !! 80 and if the system is not of any sub-arch type above.
372 81
373 endchoice !! 82 If you don't have such a system, you should say N here.
>> 83
>> 84 config X86_VISWS
>> 85 bool "SGI 320/540 (Visual Workstation)"
>> 86 help
>> 87 The SGI Visual Workstation series is an IA32-based workstation
>> 88 based on SGI systems chips with some legacy PC hardware attached.
374 89
375 config MARCH_Z10_TUNE !! 90 Say Y here to create a kernel to run on the SGI 320 or 540.
376 def_bool TUNE_Z10 || MARCH_Z10 && TUNE <<
377 91
378 config MARCH_Z196_TUNE !! 92 A kernel compiled for the Visual Workstation will not run on PCs
379 def_bool TUNE_Z196 || MARCH_Z196 && TU !! 93 and vice versa. See <file:Documentation/sgi-visws.txt> for details.
380 94
381 config MARCH_ZEC12_TUNE !! 95 config X86_GENERICARCH
382 def_bool TUNE_ZEC12 || MARCH_ZEC12 && !! 96 bool "Generic architecture (Summit, bigsmp, default)"
>> 97 depends on SMP
>> 98 help
>> 99 This option compiles in the Summit, bigsmp, default subarchitectures.
>> 100 It is intended for a generic binary kernel.
383 101
384 config MARCH_Z13_TUNE !! 102 config X86_ES7000
385 def_bool TUNE_Z13 || MARCH_Z13 && TUNE !! 103 bool "Support for Unisys ES7000 IA32 series"
>> 104 depends on SMP
>> 105 help
>> 106 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
>> 107 supposed to run on an IA32-based Unisys ES7000 system.
>> 108 Only choose this option if you have such a system, otherwise you
>> 109 should say N here.
386 110
387 config MARCH_Z14_TUNE !! 111 endchoice
388 def_bool TUNE_Z14 || MARCH_Z14 && TUNE <<
389 112
390 config MARCH_Z15_TUNE !! 113 config ACPI_SRAT
391 def_bool TUNE_Z15 || MARCH_Z15 && TUNE !! 114 bool
>> 115 default y
>> 116 depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
392 117
393 config MARCH_Z16_TUNE !! 118 config X86_CYCLONE_TIMER
394 def_bool TUNE_Z16 || MARCH_Z16 && TUNE !! 119 bool
>> 120 default y
>> 121 depends on X86_SUMMIT || X86_GENERICARCH
>> 122
>> 123 config ES7000_CLUSTERED_APIC
>> 124 bool
>> 125 default y
>> 126 depends on SMP && X86_ES7000 && MPENTIUMIII
395 127
396 choice 128 choice
397 prompt "Tune code generation" !! 129 prompt "Processor family"
398 default TUNE_DEFAULT !! 130 default M686
399 help !! 131
400 Cause the compiler to tune (-mtune) !! 132 config M386
401 This will make the code run faster o !! 133 bool "386"
402 somewhat slower on other machines. !! 134 ---help---
403 This option only changes how the com !! 135 This is the processor type of your CPU. This information is used for
404 selection of instructions itself, so !! 136 optimizing purposes. In order to compile a kernel that can run on
405 all other machines. !! 137 all x86 CPU types (albeit not optimally fast), you can specify
406 !! 138 "386" here.
407 config TUNE_DEFAULT !! 139
408 bool "Default" !! 140 The kernel will not necessarily run on earlier architectures than
409 help !! 141 the one you have chosen, e.g. a Pentium optimized kernel will run on
410 Tune the generated code for the targ !! 142 a PPro, but not necessarily on a i486.
411 will be compiled. !! 143
412 !! 144 Here are the settings recommended for greatest speed:
413 config TUNE_Z10 !! 145 - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
414 bool "IBM System z10" !! 146 486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels
415 !! 147 will run on a 386 class machine.
416 config TUNE_Z196 !! 148 - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
417 bool "IBM zEnterprise 114 and 196" !! 149 SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
418 depends on $(cc-option,-mtune=z196) !! 150 - "586" for generic Pentium CPUs lacking the TSC
419 !! 151 (time stamp counter) register.
420 config TUNE_ZEC12 !! 152 - "Pentium-Classic" for the Intel Pentium.
421 bool "IBM zBC12 and zEC12" !! 153 - "Pentium-MMX" for the Intel Pentium MMX.
422 depends on $(cc-option,-mtune=zEC12) !! 154 - "Pentium-Pro" for the Intel Pentium Pro.
423 !! 155 - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
424 config TUNE_Z13 !! 156 - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
425 bool "IBM z13s and z13" !! 157 - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
426 depends on $(cc-option,-mtune=z13) !! 158 - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
427 !! 159 - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
428 config TUNE_Z14 !! 160 - "Crusoe" for the Transmeta Crusoe series.
429 bool "IBM z14 ZR1 and z14" !! 161 - "Winchip-C6" for original IDT Winchip.
430 depends on $(cc-option,-mtune=z14) !! 162 - "Winchip-2" for IDT Winchip 2.
431 !! 163 - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
432 config TUNE_Z15 !! 164 - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
433 bool "IBM z15" !! 165 - "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).
434 depends on $(cc-option,-mtune=z15) !! 166
435 !! 167 If you don't know what to do, choose "386".
436 config TUNE_Z16 !! 168
437 bool "IBM z16" !! 169 config M486
438 depends on $(cc-option,-mtune=z16) !! 170 bool "486"
>> 171 help
>> 172 Select this for a 486 series processor, either Intel or one of the
>> 173 compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX,
>> 174 DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
>> 175 U5S.
>> 176
>> 177 config M586
>> 178 bool "586/K5/5x86/6x86/6x86MX"
>> 179 help
>> 180 Select this for an 586 or 686 series processor such as the AMD K5,
>> 181 the Intel 5x86 or 6x86, or the Intel 6x86MX. This choice does not
>> 182 assume the RDTSC (Read Time Stamp Counter) instruction.
>> 183
>> 184 config M586TSC
>> 185 bool "Pentium-Classic"
>> 186 help
>> 187 Select this for a Pentium Classic processor with the RDTSC (Read
>> 188 Time Stamp Counter) instruction for benchmarking.
>> 189
>> 190 config M586MMX
>> 191 bool "Pentium-MMX"
>> 192 help
>> 193 Select this for a Pentium with the MMX graphics/multimedia
>> 194 extended instructions.
>> 195
>> 196 config M686
>> 197 bool "Pentium-Pro"
>> 198 help
>> 199 Select this for Intel Pentium Pro chips. This enables the use of
>> 200 Pentium Pro extended instructions, and disables the init-time guard
>> 201 against the f00f bug found in earlier Pentiums.
>> 202
>> 203 config MPENTIUMII
>> 204 bool "Pentium-II/Celeron(pre-Coppermine)"
>> 205 help
>> 206 Select this for Intel chips based on the Pentium-II and
>> 207 pre-Coppermine Celeron core. This option enables an unaligned
>> 208 copy optimization, compiles the kernel with optimization flags
>> 209 tailored for the chip, and applies any applicable Pentium Pro
>> 210 optimizations.
>> 211
>> 212 config MPENTIUMIII
>> 213 bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
>> 214 help
>> 215 Select this for Intel chips based on the Pentium-III and
>> 216 Celeron-Coppermine core. This option enables use of some
>> 217 extended prefetch instructions in addition to the Pentium II
>> 218 extensions.
>> 219
>> 220 config MPENTIUM4
>> 221 bool "Pentium-4/Celeron(P4-based)/Xeon"
>> 222 help
>> 223 Select this for Intel Pentium 4 chips. This includes both
>> 224 the Pentium 4 and P4-based Celeron chips. This option
>> 225 enables compile flags optimized for the chip, uses the
>> 226 correct cache shift, and applies any applicable Pentium III
>> 227 optimizations.
>> 228
>> 229 config MK6
>> 230 bool "K6/K6-II/K6-III"
>> 231 help
>> 232 Select this for an AMD K6-family processor. Enables use of
>> 233 some extended instructions, and passes appropriate optimization
>> 234 flags to GCC.
>> 235
>> 236 config MK7
>> 237 bool "Athlon/Duron/K7"
>> 238 help
>> 239 Select this for an AMD Athlon K7-family processor. Enables use of
>> 240 some extended instructions, and passes appropriate optimization
>> 241 flags to GCC.
>> 242
>> 243 config MK8
>> 244 bool "Opteron/Athlon64/Hammer/K8"
>> 245 help
>> 246 Select this for an AMD Opteron or Athlon64 Hammer-family processor. Enables
>> 247 use of some extended instructions, and passes appropriate optimization
>> 248 flags to GCC.
>> 249
>> 250 config MELAN
>> 251 bool "Elan"
>> 252
>> 253 config MCRUSOE
>> 254 bool "Crusoe"
>> 255 help
>> 256 Select this for a Transmeta Crusoe processor. Treats the processor
>> 257 like a 586 with TSC, and sets some GCC optimization flags (like a
>> 258 Pentium Pro with no alignment requirements).
>> 259
>> 260 config MWINCHIPC6
>> 261 bool "Winchip-C6"
>> 262 help
>> 263 Select this for an IDT Winchip C6 chip. Linux and GCC
>> 264 treat this chip as a 586TSC with some extended instructions
>> 265 and alignment requirements.
>> 266
>> 267 config MWINCHIP2
>> 268 bool "Winchip-2"
>> 269 help
>> 270 Select this for an IDT Winchip-2. Linux and GCC
>> 271 treat this chip as a 586TSC with some extended instructions
>> 272 and alignment requirements.
>> 273
>> 274 config MWINCHIP3D
>> 275 bool "Winchip-2A/Winchip-3"
>> 276 help
>> 277 Select this for an IDT Winchip-2A or 3. Linux and GCC
>> 278 treat this chip as a 586TSC with some extended instructions
>> 279 and alignment reqirements. Also enable out of order memory
>> 280 stores for this CPU, which can increase performance of some
>> 281 operations.
>> 282
>> 283 config MCYRIXIII
>> 284 bool "CyrixIII/VIA-C3"
>> 285 help
>> 286 Select this for a Cyrix III or C3 chip. Presently Linux and GCC
>> 287 treat this chip as a generic 586. Whilst the CPU is 686 class,
>> 288 it lacks the cmov extension which gcc assumes is present when
>> 289 generating 686 code.
>> 290 Note that Nehemiah (Model 9) and above will not boot with this
>> 291 kernel due to them lacking the 3DNow! instructions used in earlier
>> 292 incarnations of the CPU.
>> 293
>> 294 config MVIAC3_2
>> 295 bool "VIA C3-2 (Nehemiah)"
>> 296 help
>> 297 Select this for a VIA C3 "Nehemiah". Selecting this enables usage
>> 298 of SSE and tells gcc to treat the CPU as a 686.
>> 299 Note, this kernel will not boot on older (pre model 9) C3s.
439 300
440 endchoice 301 endchoice
441 302
442 config 64BIT !! 303 config X86_GENERIC
443 def_bool y !! 304 bool "Generic x86 support"
>> 305 help
>> 306 Including some tuning for non selected x86 CPUs too.
>> 307 when it has moderate overhead. This is intended for generic
>> 308 distributions kernels.
>> 309
>> 310 #
>> 311 # Define implied options from the CPU selection here
>> 312 #
>> 313 config X86_CMPXCHG
>> 314 bool
>> 315 depends on !M386
>> 316 default y
>> 317
>> 318 config X86_XADD
>> 319 bool
>> 320 depends on !M386
>> 321 default y
444 322
445 config COMMAND_LINE_SIZE !! 323 config X86_L1_CACHE_SHIFT
446 int "Maximum size of kernel command li !! 324 int
447 default 4096 !! 325 default "7" if MPENTIUM4 || X86_GENERIC
448 range 896 1048576 !! 326 default "4" if MELAN || M486 || M386
449 help !! 327 default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2
450 This allows you to specify the maxim !! 328 default "6" if MK7 || MK8
451 line. !! 329
452 !! 330 config RWSEM_GENERIC_SPINLOCK
453 config COMPAT !! 331 bool
454 def_bool n !! 332 depends on M386
455 prompt "Kernel support for 31 bit emul !! 333 default y
456 select ARCH_WANT_OLD_COMPAT_IPC <<
457 select COMPAT_OLD_SIGACTION <<
458 select HAVE_UID16 <<
459 depends on MULTIUSER <<
460 depends on !CC_IS_CLANG && !LD_IS_LLD <<
461 help <<
462 Select this option if you want to en <<
463 handle system-calls from ELF binarie <<
464 (and some other stuff like libraries <<
465 executing 31 bit applications. <<
466 334
467 If unsure say N. !! 335 config RWSEM_XCHGADD_ALGORITHM
>> 336 bool
>> 337 depends on !M386
>> 338 default y
>> 339
>> 340 config X86_PPRO_FENCE
>> 341 bool
>> 342 depends on M686 || M586MMX || M586TSC || M586 || M486 || M386
>> 343 default y
>> 344
>> 345 config X86_F00F_BUG
>> 346 bool
>> 347 depends on M586MMX || M586TSC || M586 || M486 || M386
>> 348 default y
>> 349
>> 350 config X86_WP_WORKS_OK
>> 351 bool
>> 352 depends on !M386
>> 353 default y
>> 354
>> 355 config X86_INVLPG
>> 356 bool
>> 357 depends on !M386
>> 358 default y
>> 359
>> 360 config X86_BSWAP
>> 361 bool
>> 362 depends on !M386
>> 363 default y
>> 364
>> 365 config X86_POPAD_OK
>> 366 bool
>> 367 depends on !M386
>> 368 default y
>> 369
>> 370 config X86_ALIGNMENT_16
>> 371 bool
>> 372 depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2
>> 373 default y
>> 374
>> 375 config X86_GOOD_APIC
>> 376 bool
>> 377 depends on MK7 || MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8
>> 378 default y
>> 379
>> 380 config X86_INTEL_USERCOPY
>> 381 bool
>> 382 depends on MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7
>> 383 default y
>> 384
>> 385 config X86_USE_PPRO_CHECKSUM
>> 386 bool
>> 387 depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2
>> 388 default y
>> 389
>> 390 config X86_USE_3DNOW
>> 391 bool
>> 392 depends on MCYRIXIII || MK7
>> 393 default y
>> 394
>> 395 config X86_OOSTORE
>> 396 bool
>> 397 depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6
>> 398 default y
>> 399
>> 400 config HPET_TIMER
>> 401 bool "HPET Timer Support"
>> 402 help
>> 403 This enables the use of the HPET for the kernel's internal timer.
>> 404 HPET is the next generation timer replacing legacy 8254s.
>> 405 You can safely choose Y here. However, HPET will only be
>> 406 activated if the platform and the BIOS support this feature.
>> 407 Otherwise the 8254 will be used for timing services.
>> 408
>> 409 Choose N to continue using the legacy 8254 timer.
>> 410
>> 411 config HPET_EMULATE_RTC
>> 412 def_bool HPET_TIMER && RTC=y
468 413
469 config SMP 414 config SMP
470 def_bool y !! 415 bool "Symmetric multi-processing support"
>> 416 ---help---
>> 417 This enables support for systems with more than one CPU. If you have
>> 418 a system with only one CPU, like most personal computers, say N. If
>> 419 you have a system with more than one CPU, say Y.
>> 420
>> 421 If you say N here, the kernel will run on single and multiprocessor
>> 422 machines, but will use only one CPU of a multiprocessor machine. If
>> 423 you say Y here, the kernel will run on many, but not all,
>> 424 singleprocessor machines. On a singleprocessor machine, the kernel
>> 425 will run faster if you say N here.
>> 426
>> 427 Note that if you say Y here and choose architecture "586" or
>> 428 "Pentium" under "Processor family", the kernel will not work on 486
>> 429 architectures. Similarly, multiprocessor kernels for the "PPro"
>> 430 architecture may not work on all Pentium based boards.
>> 431
>> 432 People using multiprocessor machines who say Y here should also say
>> 433 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
>> 434 Management" code will be disabled if you say Y here.
>> 435
>> 436 See also the <file:Documentation/smp.tex>,
>> 437 <file:Documentation/smp.txt>, <file:Documentation/i386/IO-APIC.txt>,
>> 438 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
>> 439 <http://www.tldp.org/docs.html#howto>.
>> 440
>> 441 If you don't know what to do here, say N.
471 442
472 config NR_CPUS 443 config NR_CPUS
473 int "Maximum number of CPUs (2-512)" !! 444 int "Maximum number of CPUs (2-255)"
474 range 2 512 !! 445 depends on SMP
475 default "64" !! 446 default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
>> 447 default "8"
476 help 448 help
477 This allows you to specify the maxim 449 This allows you to specify the maximum number of CPUs which this
478 kernel will support. The maximum sup !! 450 kernel will support. The maximum supported value is 255 and the
479 minimum value which makes sense is 2 451 minimum value which makes sense is 2.
480 452
481 This is purely to save memory - each 453 This is purely to save memory - each supported CPU adds
482 approximately sixteen kilobytes to t !! 454 approximately eight kilobytes to the kernel image.
483 <<
484 config HOTPLUG_CPU <<
485 def_bool y <<
486 455
487 config NUMA !! 456 config PREEMPT
488 bool "NUMA support" !! 457 bool "Preemptible Kernel"
489 depends on SCHED_TOPOLOGY <<
490 default n <<
491 help 458 help
492 Enable NUMA support !! 459 This option reduces the latency of the kernel when reacting to
>> 460 real-time or interactive events by allowing a low priority process to
>> 461 be preempted even if it is in kernel mode executing a system call.
>> 462 This allows applications to run more reliably even when the system is
>> 463 under load.
>> 464
>> 465 Say Y here if you are building a kernel for a desktop, embedded
>> 466 or real-time system. Say N if you are unsure.
>> 467
>> 468 config X86_UP_APIC
>> 469 bool "Local APIC support on uniprocessors" if !SMP
>> 470 depends on !(X86_VISWS || X86_VOYAGER)
>> 471 ---help---
>> 472 A local APIC (Advanced Programmable Interrupt Controller) is an
>> 473 integrated interrupt controller in the CPU. If you have a single-CPU
>> 474 system which has a processor with a local APIC, you can say Y here to
>> 475 enable and use it. If you say Y here even though your machine doesn't
>> 476 have a local APIC, then the kernel will still run with no slowdown at
>> 477 all. The local APIC supports CPU-generated self-interrupts (timer,
>> 478 performance counters), and the NMI watchdog which detects hard
>> 479 lockups.
>> 480
>> 481 If you have a system with several CPUs, you do not need to say Y
>> 482 here: the local APIC will be used automatically.
>> 483
>> 484 config X86_UP_IOAPIC
>> 485 bool "IO-APIC support on uniprocessors"
>> 486 depends on !SMP && X86_UP_APIC
>> 487 help
>> 488 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
>> 489 SMP-capable replacement for PC-style interrupt controllers. Most
>> 490 SMP systems and a small number of uniprocessor systems have one.
>> 491 If you have a single-CPU system with an IO-APIC, you can say Y here
>> 492 to use it. If you say Y here even though your machine doesn't have
>> 493 an IO-APIC, then the kernel will still run with no slowdown at all.
>> 494
>> 495 If you have a system with several CPUs, you do not need to say Y
>> 496 here: the IO-APIC will be used automatically.
>> 497
>> 498 config X86_LOCAL_APIC
>> 499 bool
>> 500 depends on !SMP && X86_UP_APIC
>> 501 default y
493 502
494 This option adds NUMA support to the !! 503 config X86_IO_APIC
>> 504 bool
>> 505 depends on !SMP && X86_UP_IOAPIC
>> 506 default y
495 507
496 config NODES_SHIFT !! 508 config X86_TSC
497 int !! 509 bool
498 depends on NUMA !! 510 depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2) && !X86_NUMAQ
499 default "1" !! 511 default y
500 512
501 config SCHED_SMT !! 513 config X86_MCE
502 def_bool n !! 514 bool "Machine Check Exception"
>> 515 ---help---
>> 516 Machine Check Exception support allows the processor to notify the
>> 517 kernel if it detects a problem (e.g. overheating, component failure).
>> 518 The action the kernel takes depends on the severity of the problem,
>> 519 ranging from a warning message on the console, to halting the machine.
>> 520 Your processor must be a Pentium or newer to support this - check the
>> 521 flags in /proc/cpuinfo for mce. Note that some older Pentium systems
>> 522 have a design flaw which leads to false MCE events - hence MCE is
>> 523 disabled on all P5 processors, unless explicitly enabled with "mce"
>> 524 as a boot argument. Similarly, if MCE is built in and creates a
>> 525 problem on some new non-standard machine, you can boot with "nomce"
>> 526 to disable it. MCE support simply ignores non-MCE processors like
>> 527 the 386 and 486, so nearly everyone can say Y here.
>> 528
>> 529 config X86_MCE_NONFATAL
>> 530 bool "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
>> 531 depends on X86_MCE
>> 532 help
>> 533 Enabling this feature starts a timer that triggers every 5 seconds which
>> 534 will look at the machine check registers to see if anything happened.
>> 535 Non-fatal problems automatically get corrected (but still logged).
>> 536 Disable this if you don't want to see these messages.
>> 537 Seeing the messages this option prints out may be indicative of dying hardware,
>> 538 or out-of-spec (ie, overclocked) hardware.
>> 539 This option only does something on certain CPUs.
>> 540 (AMD Athlon/Duron and Intel Pentium 4)
>> 541
>> 542 config X86_MCE_P4THERMAL
>> 543 bool "check for P4 thermal throttling interrupt."
>> 544 depends on X86_MCE && (X86_UP_APIC || SMP)
>> 545 help
>> 546 Enabling this feature will cause a message to be printed when the P4
>> 547 enters thermal throttling.
>> 548
>> 549 config TOSHIBA
>> 550 tristate "Toshiba Laptop support"
>> 551 ---help---
>> 552 This adds a driver to safely access the System Management Mode of
>> 553 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
>> 554 not work on models with a Phoenix BIOS. The System Management Mode
>> 555 is used to set the BIOS and power saving options on Toshiba portables.
>> 556
>> 557 For information on utilities to make use of this driver see the
>> 558 Toshiba Linux utilities web site at:
>> 559 <http://www.buzzard.org.uk/toshiba/>.
>> 560
>> 561 Say Y if you intend to run this kernel on a Toshiba portable.
>> 562 Say N otherwise.
>> 563
>> 564 config I8K
>> 565 tristate "Dell laptop support"
>> 566 ---help---
>> 567 This adds a driver to safely access the System Management Mode
>> 568 of the CPU on the Dell Inspiron 8000. The System Management Mode
>> 569 is used to read cpu temperature and cooling fan status and to
>> 570 control the fans on the I8K portables.
>> 571
>> 572 This driver has been tested only on the Inspiron 8000 but it may
>> 573 also work with other Dell laptops. You can force loading on other
>> 574 models by passing the parameter `force=1' to the module. Use at
>> 575 your own risk.
>> 576
>> 577 For information on utilities to make use of this driver see the
>> 578 I8K Linux utilities web site at:
>> 579 <http://www.debian.org/~dz/i8k/>
>> 580
>> 581 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
>> 582 Say N otherwise.
>> 583
>> 584 config MICROCODE
>> 585 tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
>> 586 ---help---
>> 587 If you say Y here and also to "/dev file system support" in the
>> 588 'File systems' section, you will be able to update the microcode on
>> 589 Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
>> 590 Pentium III, Pentium 4, Xeon etc. You will obviously need the
>> 591 actual microcode binary data itself which is not shipped with the
>> 592 Linux kernel.
>> 593
>> 594 For latest news and information on obtaining all the required
>> 595 ingredients for this driver, check:
>> 596 <http://www.urbanmyth.org/microcode/>.
503 597
504 config SCHED_MC !! 598 To compile this driver as a module, choose M here: the
505 def_bool n !! 599 module will be called microcode.
>> 600 If you use modprobe or kmod you may also want to add the line
>> 601 'alias char-major-10-184 microcode' to your /etc/modules.conf file.
>> 602
>> 603 config X86_MSR
>> 604 tristate "/dev/cpu/*/msr - Model-specific register support"
>> 605 help
>> 606 This device gives privileged processes access to the x86
>> 607 Model-Specific Registers (MSRs). It is a character device with
>> 608 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
>> 609 MSR accesses are directed to a specific CPU on multi-processor
>> 610 systems.
>> 611
>> 612 config X86_CPUID
>> 613 tristate "/dev/cpu/*/cpuid - CPU information support"
>> 614 help
>> 615 This device gives processes access to the x86 CPUID instruction to
>> 616 be executed on a specific processor. It is a character device
>> 617 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
>> 618 /dev/cpu/31/cpuid.
>> 619
>> 620 config EDD
>> 621 tristate "BIOS Enhanced Disk Drive calls determine boot disk (EXPERIMENTAL)"
>> 622 depends on EXPERIMENTAL
>> 623 help
>> 624 Say Y or M here if you want to enable BIOS Enhanced Disk Drive
>> 625 Services real mode BIOS calls to determine which disk
>> 626 BIOS tries boot from. This information is then exported via driverfs.
506 627
507 config SCHED_TOPOLOGY !! 628 This option is experimental, but believed to be safe,
508 def_bool y !! 629 and most disk controller BIOS vendors do not yet implement this feature.
509 prompt "Topology scheduler support" <<
510 select SCHED_SMT <<
511 select SCHED_MC <<
512 help <<
513 Topology scheduler support improves <<
514 making when dealing with machines th <<
515 multiple cores or multiple books. <<
516 <<
517 config SCHED_TOPOLOGY_VERTICAL <<
518 def_bool y <<
519 bool "Use vertical CPU polarization by <<
520 depends on SCHED_TOPOLOGY <<
521 help <<
522 Use vertical CPU polarization by def <<
523 The default CPU polarization is hori <<
524 <<
525 config HIPERDISPATCH_ON <<
526 def_bool y <<
527 bool "Use hiperdispatch on vertical po <<
528 depends on SCHED_TOPOLOGY <<
529 depends on PROC_SYSCTL <<
530 help <<
531 Hiperdispatch aims to improve the CP <<
532 making when using vertical polarizat <<
533 capacities dynamically. Set this opt <<
534 on vertical polarization by default. <<
535 by sysctl's s390.hiperdispatch attri <<
536 <<
537 source "kernel/Kconfig.hz" <<
538 <<
539 config CERT_STORE <<
540 bool "Get user certificates via DIAG32 <<
541 depends on KEYS <<
542 select CRYPTO_LIB_SHA256 <<
543 help <<
544 Enable this option if you want to ac <<
545 certificates via DIAG 0x320. <<
546 <<
547 These certificates will be made avai <<
548 'cert_store'. <<
549 <<
550 config KERNEL_NOBP <<
551 def_bool n <<
552 prompt "Enable modified branch predict <<
553 help <<
554 If this option is selected the kerne <<
555 branch prediction mode if the firmwa <<
556 The modified branch prediction mode <<
557 regard to speculative execution. <<
558 <<
559 With the option enabled the kernel p <<
560 can be used to run the kernel in the <<
561 <<
562 With the option disabled the modifie <<
563 enabled with the "nobp=1" kernel par <<
564 <<
565 If unsure, say N. <<
566 <<
567 config EXPOLINE <<
568 def_bool n <<
569 depends on $(cc-option,-mindirect-bran <<
570 prompt "Avoid speculative indirect bra <<
571 help <<
572 Compile the kernel with the expoline <<
573 against kernel-to-user data leaks by <<
574 branches. <<
575 Requires a compiler with -mindirect- <<
576 protection. The kernel may run slowe <<
577 <<
578 If unsure, say N. <<
579 <<
580 config EXPOLINE_EXTERN <<
581 def_bool EXPOLINE && CC_IS_GCC && GCC_ <<
582 $(success,$(srctree)/arch/s39 <<
583 help <<
584 Generate expolines as external funct <<
585 This option is required for some too <<
586 are enabled. The kernel is compiled <<
587 -mindirect-branch=thunk-extern, whic <<
588 630
589 choice 631 choice
590 prompt "Expoline default" !! 632 prompt "High Memory Support"
591 depends on EXPOLINE !! 633 default NOHIGHMEM
592 default EXPOLINE_FULL <<
593 <<
594 config EXPOLINE_OFF <<
595 bool "spectre_v2=off" <<
596 634
597 config EXPOLINE_AUTO !! 635 config NOHIGHMEM
598 bool "spectre_v2=auto" !! 636 bool "off"
>> 637 ---help---
>> 638 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
>> 639 However, the address space of 32-bit x86 processors is only 4
>> 640 Gigabytes large. That means that, if you have a large amount of
>> 641 physical memory, not all of it can be "permanently mapped" by the
>> 642 kernel. The physical memory that's not permanently mapped is called
>> 643 "high memory".
>> 644
>> 645 If you are compiling a kernel which will never run on a machine with
>> 646 more than 1 Gigabyte total physical RAM, answer "off" here (default
>> 647 choice and suitable for most users). This will result in a "3GB/1GB"
>> 648 split: 3GB are mapped so that each process sees a 3GB virtual memory
>> 649 space and the remaining part of the 4GB virtual memory space is used
>> 650 by the kernel to permanently map as much physical memory as
>> 651 possible.
>> 652
>> 653 If the machine has between 1 and 4 Gigabytes physical RAM, then
>> 654 answer "4GB" here.
>> 655
>> 656 If more than 4 Gigabytes is used then answer "64GB" here. This
>> 657 selection turns Intel PAE (Physical Address Extension) mode on.
>> 658 PAE implements 3-level paging on IA32 processors. PAE is fully
>> 659 supported by Linux, PAE mode is implemented on all recent Intel
>> 660 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
>> 661 then the kernel will not boot on CPUs that don't support PAE!
>> 662
>> 663 The actual amount of total physical memory will either be
>> 664 auto detected or can be forced by using a kernel command line option
>> 665 such as "mem=256M". (Try "man bootparam" or see the documentation of
>> 666 your boot loader (lilo or loadlin) about how to pass options to the
>> 667 kernel at boot time.)
>> 668
>> 669 If unsure, say "off".
>> 670
>> 671 config HIGHMEM4G
>> 672 bool "4GB"
>> 673 help
>> 674 Select this if you have a 32-bit processor and between 1 and 4
>> 675 gigabytes of physical RAM.
599 676
600 config EXPOLINE_FULL !! 677 config HIGHMEM64G
601 bool "spectre_v2=on" !! 678 bool "64GB"
>> 679 help
>> 680 Select this if you have a 32-bit processor and more than 4
>> 681 gigabytes of physical RAM.
602 682
603 endchoice 683 endchoice
604 684
605 config RELOCATABLE !! 685 config HIGHMEM
606 def_bool y !! 686 bool
607 help !! 687 depends on HIGHMEM64G || HIGHMEM4G
608 This builds a kernel image that reta !! 688 default y
609 so it can be loaded at an arbitrary <<
610 The relocations make the kernel imag <<
611 10%), but are discarded at runtime. <<
612 Note: this option exists only for do <<
613 not remove it. <<
614 <<
615 config RANDOMIZE_BASE <<
616 bool "Randomize the address of the ker <<
617 default y <<
618 help <<
619 In support of Kernel Address Space L <<
620 this randomizes the address at which <<
621 as a security feature that deters ex <<
622 knowledge of the location of kernel <<
623 <<
624 config RANDOMIZE_IDENTITY_BASE <<
625 bool "Randomize the address of the ide <<
626 depends on RANDOMIZE_BASE <<
627 default DEBUG_VM <<
628 help <<
629 The identity mapping base address is <<
630 Allow randomization of that base to <<
631 notion of physical and virtual addre <<
632 That does not have any impact on the <<
633 kernel image is loaded. <<
634 <<
635 If unsure, say N <<
636 <<
637 config KERNEL_IMAGE_BASE <<
638 hex "Kernel image base address" <<
639 range 0x100000 0x1FFFFFE0000000 if !KA <<
640 range 0x100000 0x1BFFFFE0000000 if KAS <<
641 default 0x3FFE0000000 if !KASAN <<
642 default 0x7FFFE0000000 if KASAN <<
643 help <<
644 This is the address at which the ker <<
645 Kernel Address Space Layout Randomiz <<
646 <<
647 In case the Protected virtualization <<
648 Ultravisor imposes a virtual address <<
649 option leads to the kernel image exc <<
650 this option is ignored and the image <<
651 <<
652 If the value of this option leads to <<
653 the virtual memory where other data <<
654 option is ignored and the image is l <<
655 689
656 endmenu !! 690 config X86_PAE
>> 691 bool
>> 692 depends on HIGHMEM64G
>> 693 default y
>> 694
>> 695 # Common NUMA Features
>> 696 config NUMA
>> 697 bool "Numa Memory Allocation Support"
>> 698 depends on SMP && HIGHMEM64G && (X86_PC || X86_NUMAQ || X86_GENERICARCH || (X86_SUMMIT && ACPI && !ACPI_HT_ONLY))
>> 699 default n if X86_PC
>> 700 default y if (X86_NUMAQ || X86_SUMMIT)
>> 701
>> 702 # Need comments to help the hapless user trying to turn on NUMA support
>> 703 comment "NUMA (NUMA-Q) requires SMP, 64GB highmem support"
>> 704 depends on X86_NUMAQ && (!HIGHMEM64G || !SMP)
>> 705
>> 706 comment "NUMA (Summit) requires SMP, 64GB highmem support, full ACPI"
>> 707 depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI || ACPI_HT_ONLY)
>> 708
>> 709 config DISCONTIGMEM
>> 710 bool
>> 711 depends on NUMA
>> 712 default y
657 713
658 menu "Memory setup" !! 714 config HAVE_ARCH_BOOTMEM_NODE
>> 715 bool
>> 716 depends on NUMA
>> 717 default y
659 718
660 config ARCH_SPARSEMEM_ENABLE !! 719 config HIGHPTE
661 def_bool y !! 720 bool "Allocate 3rd-level pagetables from highmem"
662 select SPARSEMEM_VMEMMAP_ENABLE !! 721 depends on HIGHMEM4G || HIGHMEM64G
663 select SPARSEMEM_VMEMMAP !! 722 help
664 !! 723 The VM uses one page table entry for each page of physical memory.
665 config ARCH_SPARSEMEM_DEFAULT !! 724 For systems with a lot of RAM, this can be wasteful of precious
666 def_bool y !! 725 low memory. Setting this option will put user-space page table
667 !! 726 entries in high memory.
668 config MAX_PHYSMEM_BITS !! 727
669 int "Maximum size of supported physica !! 728 config MATH_EMULATION
670 range 42 53 !! 729 bool "Math emulation"
671 default "46" !! 730 ---help---
672 help !! 731 Linux can emulate a math coprocessor (used for floating point
673 This option specifies the maximum su !! 732 operations) if you don't have one. 486DX and Pentium processors have
674 in bits. Supported is any size betwe !! 733 a math coprocessor built in, 486SX and 386 do not, unless you added
675 Increasing the number of bits also i !! 734 a 487DX or 387, respectively. (The messages during boot time can
676 By default 46 bits (64TB) are suppor !! 735 give you some hints here ["man dmesg"].) Everyone needs either a
677 !! 736 coprocessor or this emulation.
678 config CHECK_STACK !! 737
679 def_bool y !! 738 If you don't have a math coprocessor, you need to say Y here; if you
680 depends on !VMAP_STACK !! 739 say Y here even though you have a coprocessor, the coprocessor will
681 prompt "Detect kernel stack overflow" !! 740 be used nevertheless. (This behavior can be changed with the kernel
682 help !! 741 command line option "no387", which comes handy if your coprocessor
683 This option enables the compiler opt !! 742 is broken. Try "man bootparam" or see the documentation of your boot
684 -mstack-size if they are available. !! 743 loader (lilo or loadlin) about how to pass options to the kernel at
685 it will emit additional code to each !! 744 boot time.) This means that it is a good idea to say Y here if you
686 an illegal operation if the kernel s !! 745 intend to use this kernel on different machines.
687 !! 746
688 Say N if you are unsure. !! 747 More information about the internals of the Linux math coprocessor
689 !! 748 emulation can be found in <file:arch/i386/math-emu/README>.
690 config STACK_GUARD !! 749
691 int "Size of the guard area (128-1024) !! 750 If you are not sure, say Y; apart from resulting in a 66 KB bigger
692 range 128 1024 !! 751 kernel, it won't hurt.
693 depends on CHECK_STACK !! 752
694 default "256" !! 753 config MTRR
695 help !! 754 bool "MTRR (Memory Type Range Register) support"
696 This allows you to specify the size !! 755 ---help---
697 end of the kernel stack. If the kern !! 756 On Intel P6 family processors (Pentium Pro, Pentium II and later)
698 area on function entry an illegal op !! 757 the Memory Type Range Registers (MTRRs) may be used to control
699 needs to be a power of 2. Please kee !! 758 processor access to memory ranges. This is most useful if you have
700 interrupt frame is 184 bytes for 31 !! 759 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
701 The minimum size for the stack guard !! 760 allows bus write transfers to be combined into a larger transfer
702 512 for 64 bit. !! 761 before bursting over the PCI/AGP bus. This can increase performance
>> 762 of image write operations 2.5 times or more. Saying Y here creates a
>> 763 /proc/mtrr file which may be used to manipulate your processor's
>> 764 MTRRs. Typically the X server should use this.
>> 765
>> 766 This code has a reasonably generic interface so that similar
>> 767 control registers on other processors can be easily supported
>> 768 as well:
>> 769
>> 770 The Cyrix 6x86, 6x86MX and M II processors have Address Range
>> 771 Registers (ARRs) which provide a similar functionality to MTRRs. For
>> 772 these, the ARRs are used to emulate the MTRRs.
>> 773 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
>> 774 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
>> 775 write-combining. All of these processors are supported by this code
>> 776 and it makes sense to say Y here if you have one of them.
>> 777
>> 778 Saying Y here also fixes a problem with buggy SMP BIOSes which only
>> 779 set the MTRRs for the boot CPU and not for the secondary CPUs. This
>> 780 can lead to all sorts of problems, so it's good to say Y here.
>> 781
>> 782 You can safely say Y even if your machine doesn't have MTRRs, you'll
>> 783 just add about 9 KB to your kernel.
>> 784
>> 785 See <file:Documentation/mtrr.txt> for more information.
>> 786
>> 787 config HAVE_DEC_LOCK
>> 788 bool
>> 789 depends on (SMP || PREEMPT) && X86_CMPXCHG
>> 790 default y
>> 791
>> 792 # turning this on wastes a bunch of space.
>> 793 # Summit needs it only when NUMA is on
>> 794 config BOOT_IOREMAP
>> 795 bool
>> 796 depends on ((X86_SUMMIT || X86_GENERICARCH) && NUMA)
>> 797 default y
703 798
704 endmenu 799 endmenu
705 800
706 menu "I/O subsystem" <<
707 801
708 config QDIO !! 802 menu "Power management options (ACPI, APM)"
709 def_tristate y !! 803 depends on !X86_VOYAGER
710 prompt "QDIO support" !! 804
711 help !! 805 source kernel/power/Kconfig
712 This driver provides the Queued Dire !! 806
713 IBM System z. !! 807 source "drivers/acpi/Kconfig"
>> 808
>> 809 menu "APM (Advanced Power Management) BIOS Support"
>> 810 depends on PM
>> 811
>> 812 config APM
>> 813 tristate "APM (Advanced Power Management) BIOS support"
>> 814 depends on PM
>> 815 ---help---
>> 816 APM is a BIOS specification for saving power using several different
>> 817 techniques. This is mostly useful for battery powered laptops with
>> 818 APM compliant BIOSes. If you say Y here, the system time will be
>> 819 reset after a RESUME operation, the /proc/apm device will provide
>> 820 battery status information, and user-space programs will receive
>> 821 notification of APM "events" (e.g. battery status change).
>> 822
>> 823 If you select "Y" here, you can disable actual use of the APM
>> 824 BIOS by passing the "apm=off" option to the kernel at boot time.
>> 825
>> 826 Note that the APM support is almost completely disabled for
>> 827 machines with more than one CPU.
>> 828
>> 829 In order to use APM, you will need supporting software. For location
>> 830 and more information, read <file:Documentation/pm.txt> and the
>> 831 Battery Powered Linux mini-HOWTO, available from
>> 832 <http://www.tldp.org/docs.html#howto>.
>> 833
>> 834 This driver does not spin down disk drives (see the hdparm(8)
>> 835 manpage ("man 8 hdparm") for that), and it doesn't turn off
>> 836 VESA-compliant "green" monitors.
>> 837
>> 838 This driver does not support the TI 4000M TravelMate and the ACER
>> 839 486/DX4/75 because they don't have compliant BIOSes. Many "green"
>> 840 desktop machines also don't have compliant BIOSes, and this driver
>> 841 may cause those machines to panic during the boot phase.
>> 842
>> 843 Generally, if you don't have a battery in your machine, there isn't
>> 844 much point in using this driver and you should say N. If you get
>> 845 random kernel OOPSes or reboots that don't seem to be related to
>> 846 anything, try disabling/enabling this option (or disabling/enabling
>> 847 APM in your BIOS).
>> 848
>> 849 Some other things you should try when experiencing seemingly random,
>> 850 "weird" problems:
>> 851
>> 852 1) make sure that you have enough swap space and that it is
>> 853 enabled.
>> 854 2) pass the "no-hlt" option to the kernel
>> 855 3) switch on floating point emulation in the kernel and pass
>> 856 the "no387" option to the kernel
>> 857 4) pass the "floppy=nodma" option to the kernel
>> 858 5) pass the "mem=4M" option to the kernel (thereby disabling
>> 859 all but the first 4 MB of RAM)
>> 860 6) make sure that the CPU is not over clocked.
>> 861 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
>> 862 8) disable the cache from your BIOS settings
>> 863 9) install a fan for the video card or exchange video RAM
>> 864 10) install a better fan for the CPU
>> 865 11) exchange RAM chips
>> 866 12) exchange the motherboard.
714 867
715 To compile this driver as a module, 868 To compile this driver as a module, choose M here: the
716 module will be called qdio. !! 869 module will be called apm.
717 870
718 If unsure, say Y. !! 871 config APM_IGNORE_USER_SUSPEND
>> 872 bool "Ignore USER SUSPEND"
>> 873 depends on APM
>> 874 help
>> 875 This option will ignore USER SUSPEND requests. On machines with a
>> 876 compliant APM BIOS, you want to say N. However, on the NEC Versa M
>> 877 series notebooks, it is necessary to say Y because of a BIOS bug.
>> 878
>> 879 config APM_DO_ENABLE
>> 880 bool "Enable PM at boot time"
>> 881 depends on APM
>> 882 ---help---
>> 883 Enable APM features at boot time. From page 36 of the APM BIOS
>> 884 specification: "When disabled, the APM BIOS does not automatically
>> 885 power manage devices, enter the Standby State, enter the Suspend
>> 886 State, or take power saving steps in response to CPU Idle calls."
>> 887 This driver will make CPU Idle calls when Linux is idle (unless this
>> 888 feature is turned off -- see "Do CPU IDLE calls", below). This
>> 889 should always save battery power, but more complicated APM features
>> 890 will be dependent on your BIOS implementation. You may need to turn
>> 891 this option off if your computer hangs at boot time when using APM
>> 892 support, or if it beeps continuously instead of suspending. Turn
>> 893 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
>> 894 T400CDT. This is off by default since most machines do fine without
>> 895 this feature.
>> 896
>> 897 config APM_CPU_IDLE
>> 898 bool "Make CPU Idle calls when idle"
>> 899 depends on APM
>> 900 help
>> 901 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
>> 902 On some machines, this can activate improved power savings, such as
>> 903 a slowed CPU clock rate, when the machine is idle. These idle calls
>> 904 are made after the idle loop has run for some length of time (e.g.,
>> 905 333 mS). On some machines, this will cause a hang at boot time or
>> 906 whenever the CPU becomes idle. (On machines with more than one CPU,
>> 907 this option does nothing.)
>> 908
>> 909 config APM_DISPLAY_BLANK
>> 910 bool "Enable console blanking using APM"
>> 911 depends on APM
>> 912 help
>> 913 Enable console blanking using the APM. Some laptops can use this to
>> 914 turn off the LCD backlight when the screen blanker of the Linux
>> 915 virtual console blanks the screen. Note that this is only used by
>> 916 the virtual console screen blanker, and won't turn off the backlight
>> 917 when using the X Window system. This also doesn't have anything to
>> 918 do with your VESA-compliant power-saving monitor. Further, this
>> 919 option doesn't work for all laptops -- it might not turn off your
>> 920 backlight at all, or it might print a lot of errors to the console,
>> 921 especially if you are using gpm.
>> 922
>> 923 config APM_RTC_IS_GMT
>> 924 bool "RTC stores time in GMT"
>> 925 depends on APM
>> 926 help
>> 927 Say Y here if your RTC (Real Time Clock a.k.a. hardware clock)
>> 928 stores the time in GMT (Greenwich Mean Time). Say N if your RTC
>> 929 stores localtime.
>> 930
>> 931 It is in fact recommended to store GMT in your RTC, because then you
>> 932 don't have to worry about daylight savings time changes. The only
>> 933 reason not to use GMT in your RTC is if you also run a broken OS
>> 934 that doesn't understand GMT.
>> 935
>> 936 config APM_ALLOW_INTS
>> 937 bool "Allow interrupts during APM BIOS calls"
>> 938 depends on APM
>> 939 help
>> 940 Normally we disable external interrupts while we are making calls to
>> 941 the APM BIOS as a measure to lessen the effects of a badly behaving
>> 942 BIOS implementation. The BIOS should reenable interrupts if it
>> 943 needs to. Unfortunately, some BIOSes do not -- especially those in
>> 944 many of the newer IBM Thinkpads. If you experience hangs when you
>> 945 suspend, try setting this to Y. Otherwise, say N.
>> 946
>> 947 config APM_REAL_MODE_POWER_OFF
>> 948 bool "Use real mode APM BIOS call to power off"
>> 949 depends on APM
>> 950 help
>> 951 Use real mode APM BIOS calls to switch off the computer. This is
>> 952 a work-around for a number of buggy BIOSes. Switch this option on if
>> 953 your computer crashes instead of powering off properly.
719 954
720 if PCI !! 955 endmenu
721 956
722 config PCI_NR_FUNCTIONS !! 957 source "arch/i386/kernel/cpu/cpufreq/Kconfig"
723 int "Maximum number of PCI functions ( <<
724 range 1 4096 <<
725 default "512" <<
726 help <<
727 This allows you to specify the maxim <<
728 this kernel will support. <<
729 958
730 endif # PCI !! 959 endmenu
731 960
732 config HAS_IOMEM <<
733 def_bool PCI <<
734 961
735 config CHSC_SCH !! 962 menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
736 def_tristate m <<
737 prompt "Support for CHSC subchannels" <<
738 help <<
739 This driver allows usage of CHSC sub <<
740 is usually present on LPAR only. <<
741 The driver creates a device /dev/chs <<
742 obtain I/O configuration information <<
743 to issue asynchronous chsc commands <<
744 You will usually only want to use th <<
745 LPAR designated for system managemen <<
746 963
747 To compile this driver as a module, !! 964 config X86_VISWS_APIC
748 module will be called chsc_sch. !! 965 bool
>> 966 depends on X86_VISWS
>> 967 default y
749 968
750 If unsure, say N. !! 969 config X86_LOCAL_APIC
>> 970 bool
>> 971 depends on (X86_VISWS || SMP) && !X86_VOYAGER
>> 972 default y
751 973
752 config SCM_BUS !! 974 config X86_IO_APIC
753 def_bool y !! 975 bool
754 prompt "SCM bus driver" !! 976 depends on SMP && !(X86_VISWS || X86_VOYAGER)
755 help !! 977 default y
756 Bus driver for Storage Class Memory. <<
757 978
758 config EADM_SCH !! 979 config PCI
759 def_tristate m !! 980 bool "PCI support" if !X86_VISWS
760 prompt "Support for EADM subchannels" !! 981 depends on !X86_VOYAGER
761 depends on SCM_BUS !! 982 default y if X86_VISWS
762 help !! 983 help
763 This driver allows usage of EADM sub !! 984 Find out whether you have a PCI motherboard. PCI is the name of a
764 as a communication vehicle for SCM i !! 985 bus system, i.e. the way the CPU talks to the other stuff inside
>> 986 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
>> 987 VESA. If you have PCI, say Y, otherwise N.
>> 988
>> 989 The PCI-HOWTO, available from
>> 990 <http://www.tldp.org/docs.html#howto>, contains valuable
>> 991 information about which PCI hardware does work under Linux and which
>> 992 doesn't.
765 993
766 To compile this driver as a module, !! 994 choice
767 module will be called eadm_sch. !! 995 prompt "PCI access mode"
>> 996 depends on PCI && !X86_VISWS
>> 997 default PCI_GOANY
>> 998
>> 999 config PCI_GOBIOS
>> 1000 bool "BIOS"
>> 1001 ---help---
>> 1002 On PCI systems, the BIOS can be used to detect the PCI devices and
>> 1003 determine their configuration. However, some old PCI motherboards
>> 1004 have BIOS bugs and may crash if this is done. Also, some embedded
>> 1005 PCI-based systems don't have any BIOS at all. Linux can also try to
>> 1006 detect the PCI hardware directly without using the BIOS.
>> 1007
>> 1008 With this option, you can specify how Linux should detect the PCI
>> 1009 devices. If you choose "BIOS", the BIOS will be used, if you choose
>> 1010 "Direct", the BIOS won't be used, and if you choose "Any", the
>> 1011 kernel will try the direct access method and falls back to the BIOS
>> 1012 if that doesn't work. If unsure, go with the default, which is
>> 1013 "Any".
768 1014
769 config AP !! 1015 config PCI_GODIRECT
770 def_tristate y !! 1016 bool "Direct"
771 prompt "Support for Adjunct Processors <<
772 help <<
773 This driver allows usage to Adjunct <<
774 the ap bus, cards and queues. Suppor <<
775 the CryptoExpress Cards (CEX). <<
776 1017
777 To compile this driver as a module, !! 1018 config PCI_GOANY
778 module will be called ap. !! 1019 bool "Any"
>> 1020
>> 1021 endchoice
>> 1022
>> 1023 config PCI_BIOS
>> 1024 bool
>> 1025 depends on !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
>> 1026 default y
>> 1027
>> 1028 config PCI_DIRECT
>> 1029 bool
>> 1030 depends on PCI && ((PCI_GODIRECT || PCI_GOANY) || X86_VISWS)
>> 1031 default y
779 1032
780 If unsure, say Y (default). !! 1033 source "drivers/pci/Kconfig"
781 1034
782 config AP_DEBUG !! 1035 config ISA
783 def_bool n !! 1036 bool "ISA support"
784 prompt "Enable debug features for Adju !! 1037 depends on !(X86_VOYAGER || X86_VISWS)
785 depends on AP <<
786 help 1038 help
787 Say 'Y' here to enable some addition !! 1039 Find out whether you have ISA slots on your motherboard. ISA is the
788 Processor (ap) devices. !! 1040 name of a bus system, i.e. the way the CPU talks to the other stuff
>> 1041 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 1042 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 1043 newer boards don't support it. If you have ISA, say Y, otherwise N.
>> 1044
>> 1045 config EISA
>> 1046 bool "EISA support"
>> 1047 depends on ISA
>> 1048 ---help---
>> 1049 The Extended Industry Standard Architecture (EISA) bus was
>> 1050 developed as an open alternative to the IBM MicroChannel bus.
>> 1051
>> 1052 The EISA bus provided some of the features of the IBM MicroChannel
>> 1053 bus while maintaining backward compatibility with cards made for
>> 1054 the older ISA bus. The EISA bus saw limited use between 1988 and
>> 1055 1995 when it was made obsolete by the PCI bus.
789 1056
790 There will be some more sysfs attrib !! 1057 Say Y here if you are building a kernel for an EISA-based machine.
791 1058
792 Do not enable on production level ke !! 1059 Otherwise, say N.
793 1060
794 If unsure, say N. !! 1061 source "drivers/eisa/Kconfig"
795 1062
796 config VFIO_CCW !! 1063 config MCA
797 def_tristate n !! 1064 bool "MCA support"
798 prompt "Support for VFIO-CCW subchanne !! 1065 depends on !(X86_VISWS || X86_VOYAGER)
799 depends on VFIO <<
800 select VFIO_MDEV <<
801 help 1066 help
802 This driver allows usage of I/O subc !! 1067 MicroChannel Architecture is found in some IBM PS/2 machines and
>> 1068 laptops. It is a bus system similar to PCI or ISA. See
>> 1069 <file:Documentation/mca.txt> (and especially the web page given
>> 1070 there) before attempting to build an MCA bus kernel.
803 1071
804 To compile this driver as a module, !! 1072 config MCA
805 module will be called vfio_ccw. !! 1073 depends on X86_VOYAGER
>> 1074 default y if X86_VOYAGER
>> 1075
>> 1076 source "drivers/mca/Kconfig"
806 1077
807 config VFIO_AP !! 1078 config SCx200
808 def_tristate n !! 1079 tristate "NatSemi SCx200 support"
809 prompt "VFIO support for AP devices" !! 1080 depends on !X86_VOYAGER
810 depends on KVM <<
811 depends on VFIO <<
812 depends on AP <<
813 select VFIO_MDEV <<
814 help 1081 help
815 This driver grants access to Adjunct !! 1082 This provides basic support for the National Semiconductor SCx200
816 via the VFIO mediated device interfa !! 1083 processor. Right now this is just a driver for the GPIO pins.
>> 1084
>> 1085 If you don't know what to do here, say N.
>> 1086
>> 1087 This support is also available as a module. If compiled as a
>> 1088 module, it will be called scx200.
817 1089
818 To compile this driver as a module, !! 1090 config HOTPLUG
819 will be called vfio_ap. !! 1091 bool "Support for hot-pluggable devices"
>> 1092 ---help---
>> 1093 Say Y here if you want to plug devices into your computer while
>> 1094 the system is running, and be able to use them quickly. In many
>> 1095 cases, the devices can likewise be unplugged at any time too.
>> 1096
>> 1097 One well known example of this is PCMCIA- or PC-cards, credit-card
>> 1098 size devices such as network cards, modems or hard drives which are
>> 1099 plugged into slots found on all modern laptop computers. Another
>> 1100 example, used on modern desktops as well as laptops, is USB.
>> 1101
>> 1102 Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
>> 1103 software (at <http://linux-hotplug.sourceforge.net/>) and install it.
>> 1104 Then your kernel will automatically call out to a user mode "policy
>> 1105 agent" (/sbin/hotplug) to load modules and set up software needed
>> 1106 to use devices as you hotplug them.
>> 1107
>> 1108 source "drivers/pcmcia/Kconfig"
>> 1109
>> 1110 source "drivers/pci/hotplug/Kconfig"
820 1111
821 endmenu 1112 endmenu
822 1113
823 config CCW <<
824 def_bool y <<
825 1114
826 config HAVE_PNETID !! 1115 menu "Executable file formats"
827 tristate <<
828 default (SMC || CCWGROUP) <<
829 <<
830 menu "Virtualization" <<
831 <<
832 config PFAULT <<
833 def_bool y <<
834 prompt "Pseudo page fault support" <<
835 help <<
836 Select this option, if you want to u <<
837 handling under VM. If running native <<
838 has no effect. If your VM does not s <<
839 pseudo page fault handling will be u <<
840 Note that VM 4.2 supports PFAULT but <<
841 implementation that causes some prob <<
842 Everybody who wants to run Linux und <<
843 this option. <<
844 <<
845 config CMM <<
846 def_tristate n <<
847 prompt "Cooperative memory management" <<
848 help <<
849 Select this option, if you want to e <<
850 to reduce the memory size of the sys <<
851 by allocating pages of memory and pu <<
852 makes sense for a system running und <<
853 will be reused by VM for other guest <<
854 allows an external monitor to balanc <<
855 Everybody who wants to run Linux und <<
856 option. <<
857 <<
858 config CMM_IUCV <<
859 def_bool y <<
860 prompt "IUCV special message interface <<
861 depends on CMM && (SMSGIUCV=y || CMM=S <<
862 help <<
863 Select this option to enable the spe <<
864 the cooperative memory management. <<
865 <<
866 config APPLDATA_BASE <<
867 def_bool n <<
868 prompt "Linux - VM Monitor Stream, bas <<
869 depends on PROC_SYSCTL <<
870 help <<
871 This provides a kernel interface for <<
872 monitor records. The monitor records <<
873 intervals, once the timer is started <<
874 Writing 1 or 0 to /proc/appldata/tim <<
875 i.e. enables or disables monitoring <<
876 A custom interval value (in seconds) <<
877 /proc/appldata/interval. <<
878 <<
879 Defaults are 60 seconds interval and <<
880 The /proc entries can also be read f <<
881 <<
882 config APPLDATA_MEM <<
883 def_tristate m <<
884 prompt "Monitor memory management stat <<
885 depends on APPLDATA_BASE && VM_EVENT_C <<
886 help <<
887 This provides memory management rela <<
888 Stream, like paging/swapping rate, m <<
889 Writing 1 or 0 to /proc/appldata/mem <<
890 APPLDATA monitor record, i.e. enable <<
891 on the z/VM side. <<
892 <<
893 Default is disabled. <<
894 The /proc entry can also be read fro <<
895 <<
896 This can also be compiled as a modul <<
897 appldata_mem.o. <<
898 <<
899 config APPLDATA_OS <<
900 def_tristate m <<
901 prompt "Monitor OS statistics" <<
902 depends on APPLDATA_BASE <<
903 help <<
904 This provides OS related data to the <<
905 CPU utilisation, etc. <<
906 Writing 1 or 0 to /proc/appldata/os <<
907 APPLDATA monitor record, i.e. enable <<
908 on the z/VM side. <<
909 <<
910 Default is disabled. <<
911 This can also be compiled as a modul <<
912 appldata_os.o. <<
913 <<
914 config APPLDATA_NET_SUM <<
915 def_tristate m <<
916 prompt "Monitor overall network statis <<
917 depends on APPLDATA_BASE && NET <<
918 help <<
919 This provides network related data t <<
920 currently there is only a total sum <<
921 per-interface data. <<
922 Writing 1 or 0 to /proc/appldata/net <<
923 APPLDATA monitor record, i.e. enable <<
924 on the z/VM side. <<
925 <<
926 Default is disabled. <<
927 This can also be compiled as a modul <<
928 appldata_net_sum.o. <<
929 <<
930 config S390_HYPFS <<
931 def_bool y <<
932 prompt "s390 hypervisor information" <<
933 help <<
934 This provides several binary files a <<
935 provide accounting information in an <<
936 <<
937 config S390_HYPFS_FS <<
938 def_bool n <<
939 prompt "s390 hypervisor file system su <<
940 select SYS_HYPERVISOR <<
941 depends on S390_HYPFS <<
942 help <<
943 This is a virtual file system intend <<
944 information in an s390 hypervisor en <<
945 is deprecated and should not be used <<
946 <<
947 Say N if you are unsure. <<
948 <<
949 source "arch/s390/kvm/Kconfig" <<
950 <<
951 config S390_GUEST <<
952 def_bool y <<
953 prompt "s390 support for virtio device <<
954 select TTY <<
955 select VIRTUALIZATION <<
956 select VIRTIO <<
957 help <<
958 Enabling this option adds support fo <<
959 drivers on s390. <<
960 1116
961 Select this option if you want to ru !! 1117 source "fs/Kconfig.binfmt"
962 the KVM hypervisor. <<
963 1118
964 endmenu 1119 endmenu
965 1120
966 config S390_MODULES_SANITY_TEST_HELPERS !! 1121 source "drivers/Kconfig"
967 def_bool n <<
968 1122
969 menu "Selftests" !! 1123 source "fs/Kconfig"
970 1124
971 config S390_UNWIND_SELFTEST !! 1125 source "arch/i386/oprofile/Kconfig"
972 def_tristate n !! 1126
973 depends on KUNIT !! 1127
974 default KUNIT_ALL_TESTS !! 1128 menu "Kernel hacking"
975 prompt "Test unwind functions" !! 1129
976 help !! 1130 config DEBUG_KERNEL
977 This option enables s390 specific st !! 1131 bool "Kernel debugging"
978 module. This option is not useful fo !! 1132 help
979 kernels, but only for kernel develop !! 1133 Say Y here if you are developing drivers or trying to debug and
980 !! 1134 identify kernel problems.
981 Say N if you are unsure. !! 1135
982 !! 1136 config DEBUG_STACKOVERFLOW
983 config S390_KPROBES_SANITY_TEST !! 1137 bool "Check for stack overflows"
984 def_tristate n !! 1138 depends on DEBUG_KERNEL
985 prompt "Enable s390 specific kprobes t !! 1139
986 depends on KPROBES !! 1140 config DEBUG_SLAB
987 depends on KUNIT !! 1141 bool "Debug memory allocations"
988 help !! 1142 depends on DEBUG_KERNEL
989 This option enables an s390 specific !! 1143 help
990 is not useful for distributions or g !! 1144 Say Y here to have the kernel do limited verification on memory
991 developers working on architecture c !! 1145 allocation as well as poisoning memory on free to catch use of freed
992 !! 1146 memory.
993 Say N if you are unsure. !! 1147
994 !! 1148 config DEBUG_IOVIRT
995 config S390_MODULES_SANITY_TEST !! 1149 bool "Memory mapped I/O debugging"
996 def_tristate n !! 1150 depends on DEBUG_KERNEL
997 depends on KUNIT !! 1151 help
998 default KUNIT_ALL_TESTS !! 1152 Say Y here to get warned whenever an attempt is made to do I/O on
999 prompt "Enable s390 specific modules t !! 1153 obviously invalid addresses such as those generated when ioremap()
1000 select S390_MODULES_SANITY_TEST_HELPE !! 1154 calls are forgotten. Memory mapped I/O will go through an extra
1001 help !! 1155 check to catch access to unmapped ISA addresses, an access method
1002 This option enables an s390 specifi !! 1156 that can still be used by old drivers that are being ported from
1003 not useful for distributions or gen !! 1157 2.0/2.2.
1004 kernel developers working on archit !! 1158
>> 1159 config MAGIC_SYSRQ
>> 1160 bool "Magic SysRq key"
>> 1161 depends on DEBUG_KERNEL
>> 1162 help
>> 1163 If you say Y here, you will have some control over the system even
>> 1164 if the system crashes for example during kernel debugging (e.g., you
>> 1165 will be able to flush the buffer cache to disk, reboot the system
>> 1166 immediately or dump some status information). This is accomplished
>> 1167 by pressing various keys while holding SysRq (Alt+PrintScreen). It
>> 1168 also works on a serial console (on PC hardware at least), if you
>> 1169 send a BREAK and then within 5 seconds a command keypress. The
>> 1170 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
>> 1171 unless you really know what this hack does.
>> 1172
>> 1173 config DEBUG_SPINLOCK
>> 1174 bool "Spinlock debugging"
>> 1175 depends on DEBUG_KERNEL
>> 1176 help
>> 1177 Say Y here and build SMP to catch missing spinlock initialization
>> 1178 and certain other kinds of spinlock errors commonly made. This is
>> 1179 best used in conjunction with the NMI watchdog so that spinlock
>> 1180 deadlocks are also debuggable.
>> 1181
>> 1182 config DEBUG_PAGEALLOC
>> 1183 bool "Page alloc debugging"
>> 1184 depends on DEBUG_KERNEL
>> 1185 help
>> 1186 Unmap pages from the kernel linear mapping after free_pages().
>> 1187 This results in a large slowdown, but helps to find certain types
>> 1188 of memory corruptions.
>> 1189
>> 1190 config DEBUG_HIGHMEM
>> 1191 bool "Highmem debugging"
>> 1192 depends on DEBUG_KERNEL && HIGHMEM
>> 1193 help
>> 1194 This options enables addition error checking for high memory systems.
>> 1195 Disable for production systems.
>> 1196
>> 1197 config DEBUG_INFO
>> 1198 bool "Compile the kernel with debug info"
>> 1199 depends on DEBUG_KERNEL
>> 1200 help
>> 1201 If you say Y here the resulting kernel image will include
>> 1202 debugging info resulting in a larger kernel image.
>> 1203 Say Y here only if you plan to use gdb to debug the kernel.
>> 1204 If you don't debug the kernel, you can say N.
>> 1205
>> 1206 config DEBUG_SPINLOCK_SLEEP
>> 1207 bool "Sleep-inside-spinlock checking"
>> 1208 help
>> 1209 If you say Y here, various routines which may sleep will become very
>> 1210 noisy if they are called with a spinlock held.
>> 1211
>> 1212 config FRAME_POINTER
>> 1213 bool "Compile the kernel with frame pointers"
>> 1214 help
>> 1215 If you say Y here the resulting kernel image will be slightly larger
>> 1216 and slower, but it will give very useful debugging information.
>> 1217 If you don't debug the kernel, you can say N, but we may not be able
>> 1218 to solve problems without frame pointers.
>> 1219
>> 1220 config X86_EXTRA_IRQS
>> 1221 bool
>> 1222 depends on X86_LOCAL_APIC || X86_VOYAGER
>> 1223 default y
>> 1224
>> 1225 config X86_FIND_SMP_CONFIG
>> 1226 bool
>> 1227 depends on X86_LOCAL_APIC || X86_VOYAGER
>> 1228 default y
>> 1229
>> 1230 config X86_MPPARSE
>> 1231 bool
>> 1232 depends on X86_LOCAL_APIC && !X86_VISWS
>> 1233 default y
1005 1234
1006 Say N if you are unsure. <<
1007 endmenu 1235 endmenu
>> 1236
>> 1237 source "security/Kconfig"
>> 1238
>> 1239 source "crypto/Kconfig"
>> 1240
>> 1241 source "lib/Kconfig"
>> 1242
>> 1243 config X86_SMP
>> 1244 bool
>> 1245 depends on SMP && !X86_VOYAGER
>> 1246 default y
>> 1247
>> 1248 config X86_HT
>> 1249 bool
>> 1250 depends on SMP && !(X86_VISWS || X86_VOYAGER)
>> 1251 default y
>> 1252
>> 1253 config X86_BIOS_REBOOT
>> 1254 bool
>> 1255 depends on !(X86_VISWS || X86_VOYAGER)
>> 1256 default y
>> 1257
>> 1258 config X86_TRAMPOLINE
>> 1259 bool
>> 1260 depends on SMP || X86_VISWS
>> 1261 default y
>> 1262
>> 1263 config PC
>> 1264 bool
>> 1265 depends on X86 && !EMBEDDED
>> 1266 default y
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