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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | config MMU |
61d48c2c | 3 | def_bool y |
1da177e4 | 4 | |
66701b14 | 5 | config ZONE_DMA |
69dbb2f7 | 6 | def_bool y |
66701b14 | 7 | |
2fd92273 HC |
8 | config CPU_BIG_ENDIAN |
9 | def_bool y | |
10 | ||
2b105ff9 | 11 | config LOCKDEP_SUPPORT |
61d48c2c | 12 | def_bool y |
2b105ff9 | 13 | |
5bdc9b44 | 14 | config STACKTRACE_SUPPORT |
61d48c2c | 15 | def_bool y |
5bdc9b44 | 16 | |
1da177e4 LT |
17 | config RWSEM_GENERIC_SPINLOCK |
18 | bool | |
19 | ||
20 | config RWSEM_XCHGADD_ALGORITHM | |
61d48c2c | 21 | def_bool y |
1da177e4 | 22 | |
f0d1b0b3 | 23 | config ARCH_HAS_ILOG2_U32 |
6f9a3c33 | 24 | def_bool n |
f0d1b0b3 DH |
25 | |
26 | config ARCH_HAS_ILOG2_U64 | |
6f9a3c33 | 27 | def_bool n |
f0d1b0b3 | 28 | |
7e33db4e | 29 | config GENERIC_HWEIGHT |
61d48c2c | 30 | def_bool y |
7e33db4e | 31 | |
c0007f1a | 32 | config GENERIC_BUG |
6f9a3c33 | 33 | def_bool y if BUG |
c0007f1a | 34 | |
52499f40 HC |
35 | config GENERIC_BUG_RELATIVE_POINTERS |
36 | def_bool y | |
37 | ||
b6b40c53 | 38 | config GENERIC_LOCKBREAK |
6f9a3c33 | 39 | def_bool y if SMP && PREEMPT |
b6b40c53 | 40 | |
402b0862 | 41 | config PGSTE |
6f9a3c33 | 42 | def_bool y if KVM |
402b0862 | 43 | |
6a11f75b AM |
44 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
45 | def_bool y | |
46 | ||
843c48fd JG |
47 | config AUDIT_ARCH |
48 | def_bool y | |
49 | ||
ce816fa8 | 50 | config NO_IOPORT_MAP |
c8717a3d JG |
51 | def_bool y |
52 | ||
53 | config PCI_QUIRKS | |
54 | def_bool n | |
55 | ||
2a0a5b22 | 56 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 57 | def_bool y |
2a0a5b22 | 58 | |
5e785963 VG |
59 | config KASAN_SHADOW_OFFSET |
60 | hex | |
61 | depends on KASAN | |
5dff0381 | 62 | default 0x18000000000000 if KASAN_S390_4_LEVEL_PAGING |
5e785963 VG |
63 | default 0x30000000000 |
64 | ||
347a8dc3 | 65 | config S390 |
61d48c2c | 66 | def_bool y |
23fefe11 | 67 | select ARCH_BINFMT_ELF_STATE |
21266be9 | 68 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 69 | select ARCH_HAS_ELF_RANDOMIZE |
79962038 | 70 | select ARCH_HAS_FORTIFY_SOURCE |
957e3fac | 71 | select ARCH_HAS_GCOV_PROFILE_ALL |
e1073d1e | 72 | select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA |
907fa061 | 73 | select ARCH_HAS_KCOV |
3010a5ea | 74 | select ARCH_HAS_PTE_SPECIAL |
d2852a22 | 75 | select ARCH_HAS_SET_MEMORY |
ad21fc4f LA |
76 | select ARCH_HAS_STRICT_KERNEL_RWX |
77 | select ARCH_HAS_STRICT_MODULE_RWX | |
aa0d6e70 | 78 | select ARCH_HAS_SYSCALL_WRAPPER |
c42d8c7d | 79 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 80 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
81 | select ARCH_INLINE_READ_LOCK |
82 | select ARCH_INLINE_READ_LOCK_BH | |
83 | select ARCH_INLINE_READ_LOCK_IRQ | |
84 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 85 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
86 | select ARCH_INLINE_READ_UNLOCK |
87 | select ARCH_INLINE_READ_UNLOCK_BH | |
88 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
89 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
90 | select ARCH_INLINE_SPIN_LOCK |
91 | select ARCH_INLINE_SPIN_LOCK_BH | |
92 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
93 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
94 | select ARCH_INLINE_SPIN_TRYLOCK | |
95 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
96 | select ARCH_INLINE_SPIN_UNLOCK | |
97 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
98 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
99 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
100 | select ARCH_INLINE_WRITE_LOCK |
101 | select ARCH_INLINE_WRITE_LOCK_BH | |
102 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
103 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 104 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
105 | select ARCH_INLINE_WRITE_UNLOCK |
106 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
107 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
108 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 109 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 110 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 111 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 112 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 113 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 114 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
c1d7e01d | 115 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
116 | select BUILDTIME_EXTABLE_SORT |
117 | select CLONE_BACKWARDS2 | |
5d6a0163 | 118 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 119 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 120 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 121 | select GENERIC_CPU_DEVICES if !SMP |
d424986f | 122 | select GENERIC_CPU_VULNERABILITIES |
746479cd | 123 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 124 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 125 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 126 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 127 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 128 | select HAVE_ARCH_JUMP_LABEL |
13ddb52c | 129 | select HAVE_ARCH_JUMP_LABEL_RELATIVE |
42db5ed8 | 130 | select HAVE_ARCH_KASAN |
fff7fb0b | 131 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 132 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 133 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 134 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 135 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
ce3dc447 | 136 | select HAVE_ARCH_VMAP_STACK |
6077776b | 137 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
138 | select HAVE_CMPXCHG_DOUBLE |
139 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 140 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 141 | select HAVE_DEBUG_KMEMLEAK |
e1231b0e | 142 | select HAVE_DMA_CONTIGUOUS |
5a79859a HC |
143 | select HAVE_DYNAMIC_FTRACE |
144 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 145 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
d983c89c | 146 | select HAVE_FENTRY |
0e0d04a8 | 147 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
148 | select HAVE_FUNCTION_GRAPH_TRACER |
149 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 150 | select HAVE_FUTEX_CMPXCHG if FUTEX |
bc00b3ec | 151 | select HAVE_GCC_PLUGINS |
1a42010c | 152 | select HAVE_GENERIC_GUP |
0e0d04a8 HC |
153 | select HAVE_KERNEL_BZIP2 |
154 | select HAVE_KERNEL_GZIP | |
8e2872ce | 155 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
156 | select HAVE_KERNEL_LZMA |
157 | select HAVE_KERNEL_LZO | |
89b5202e | 158 | select HAVE_KERNEL_UNCOMPRESSED |
0e0d04a8 HC |
159 | select HAVE_KERNEL_XZ |
160 | select HAVE_KPROBES | |
161 | select HAVE_KRETPROBES | |
5a79859a | 162 | select HAVE_KVM |
21042d43 | 163 | select HAVE_LIVEPATCH |
c33eff60 HC |
164 | select HAVE_PERF_REGS |
165 | select HAVE_PERF_USER_STACK_DUMP | |
0e0d04a8 | 166 | select HAVE_MEMBLOCK_NODE_MAP |
50be6345 | 167 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 168 | select HAVE_MOD_ARCH_SPECIFIC |
d983c89c | 169 | select HAVE_NOP_MCOUNT |
0e0d04a8 | 170 | select HAVE_OPROFILE |
eb01d42a | 171 | select HAVE_PCI |
0e0d04a8 HC |
172 | select HAVE_PERF_EVENTS |
173 | select HAVE_REGS_AND_STACK_ACCESS_API | |
9d6d99e3 | 174 | select HAVE_RSEQ |
0e0d04a8 | 175 | select HAVE_SYSCALL_TRACEPOINTS |
0e0d04a8 | 176 | select HAVE_VIRT_CPU_ACCOUNTING |
eb01d42a CH |
177 | select IOMMU_HELPER if PCI |
178 | select IOMMU_SUPPORT if PCI | |
786d35d4 | 179 | select MODULES_USE_ELF_RELA |
eb01d42a CH |
180 | select NEED_DMA_MAP_STATE if PCI |
181 | select NEED_SG_DMA_LENGTH if PCI | |
7eddd99c | 182 | select OLD_SIGACTION |
93bead43 | 183 | select OLD_SIGSUSPEND3 |
2eac9c2d | 184 | select PCI_DOMAINS if PCI |
eb01d42a | 185 | select PCI_MSI if PCI |
bb98f396 | 186 | select SPARSE_IRQ |
0e0d04a8 | 187 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 188 | select THREAD_INFO_IN_TASK |
0563416b | 189 | select TTY |
0e0d04a8 | 190 | select VIRT_CPU_ACCOUNTING |
40565b5a | 191 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 192 | select VIRT_TO_BUS |
42a0bb3f | 193 | select HAVE_NMI |
3a368f74 | 194 | |
1da177e4 | 195 | |
fca3e357 | 196 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 197 | def_bool y |
fca3e357 | 198 | |
c81956c9 KS |
199 | config PGTABLE_LEVELS |
200 | int | |
1aea9b3f | 201 | default 5 |
c81956c9 | 202 | |
21042d43 JS |
203 | source "kernel/livepatch/Kconfig" |
204 | ||
843c48fd JG |
205 | menu "Processor type and features" |
206 | ||
207 | config HAVE_MARCH_Z900_FEATURES | |
208 | def_bool n | |
209 | ||
210 | config HAVE_MARCH_Z990_FEATURES | |
211 | def_bool n | |
212 | select HAVE_MARCH_Z900_FEATURES | |
213 | ||
214 | config HAVE_MARCH_Z9_109_FEATURES | |
215 | def_bool n | |
216 | select HAVE_MARCH_Z990_FEATURES | |
217 | ||
218 | config HAVE_MARCH_Z10_FEATURES | |
219 | def_bool n | |
220 | select HAVE_MARCH_Z9_109_FEATURES | |
221 | ||
222 | config HAVE_MARCH_Z196_FEATURES | |
223 | def_bool n | |
224 | select HAVE_MARCH_Z10_FEATURES | |
225 | ||
991c1505 HC |
226 | config HAVE_MARCH_ZEC12_FEATURES |
227 | def_bool n | |
228 | select HAVE_MARCH_Z196_FEATURES | |
229 | ||
f8b2dcbd MS |
230 | config HAVE_MARCH_Z13_FEATURES |
231 | def_bool n | |
232 | select HAVE_MARCH_ZEC12_FEATURES | |
233 | ||
6997c323 MS |
234 | config HAVE_MARCH_Z14_FEATURES |
235 | def_bool n | |
236 | select HAVE_MARCH_Z13_FEATURES | |
237 | ||
843c48fd JG |
238 | choice |
239 | prompt "Processor type" | |
7072276e | 240 | default MARCH_Z196 |
1da177e4 | 241 | |
843c48fd JG |
242 | config MARCH_Z900 |
243 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 244 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
245 | help |
246 | Select this to enable optimizations for model z800/z900 (2064 and | |
247 | 2066 series). This will enable some optimizations that are not | |
248 | available on older ESA/390 (31 Bit) only CPUs. | |
249 | ||
250 | config MARCH_Z990 | |
251 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 252 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
253 | help |
254 | Select this to enable optimizations for model z890/z990 (2084 and | |
255 | 2086 series). The kernel will be slightly faster but will not work | |
256 | on older machines. | |
257 | ||
258 | config MARCH_Z9_109 | |
259 | bool "IBM System z9" | |
5a79859a | 260 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
261 | help |
262 | Select this to enable optimizations for IBM System z9 (2094 and | |
263 | 2096 series). The kernel will be slightly faster but will not work | |
264 | on older machines. | |
265 | ||
266 | config MARCH_Z10 | |
267 | bool "IBM System z10" | |
5a79859a | 268 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
269 | help |
270 | Select this to enable optimizations for IBM System z10 (2097 and | |
271 | 2098 series). The kernel will be slightly faster but will not work | |
272 | on older machines. | |
273 | ||
274 | config MARCH_Z196 | |
275 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 276 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
277 | help |
278 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
279 | (2818 and 2817 series). The kernel will be slightly faster but will | |
280 | not work on older machines. | |
1da177e4 | 281 | |
991c1505 | 282 | config MARCH_ZEC12 |
59471227 | 283 | bool "IBM zBC12 and zEC12" |
5a79859a | 284 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 285 | help |
59471227 HC |
286 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
287 | 2827 series). The kernel will be slightly faster but will not work on | |
288 | older machines. | |
991c1505 | 289 | |
f8b2dcbd | 290 | config MARCH_Z13 |
bb3aa614 | 291 | bool "IBM z13s and z13" |
5a79859a | 292 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 293 | help |
bb3aa614 HC |
294 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
295 | 2964 series). The kernel will be slightly faster but will not work on | |
296 | older machines. | |
f8b2dcbd | 297 | |
6997c323 | 298 | config MARCH_Z14 |
451239eb | 299 | bool "IBM z14 ZR1 and z14" |
6997c323 MS |
300 | select HAVE_MARCH_Z14_FEATURES |
301 | help | |
451239eb HC |
302 | Select this to enable optimizations for IBM z14 ZR1 and z14 (3907 |
303 | and 3906 series). The kernel will be slightly faster but will not | |
304 | work on older machines. | |
6997c323 | 305 | |
843c48fd | 306 | endchoice |
1da177e4 | 307 | |
1db9e051 HC |
308 | config MARCH_Z900_TUNE |
309 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
310 | ||
311 | config MARCH_Z990_TUNE | |
312 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
313 | ||
314 | config MARCH_Z9_109_TUNE | |
315 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
316 | ||
317 | config MARCH_Z10_TUNE | |
318 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
319 | ||
320 | config MARCH_Z196_TUNE | |
321 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
322 | ||
323 | config MARCH_ZEC12_TUNE | |
324 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
325 | ||
f8b2dcbd MS |
326 | config MARCH_Z13_TUNE |
327 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
328 | ||
6997c323 MS |
329 | config MARCH_Z14_TUNE |
330 | def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
331 | ||
1db9e051 HC |
332 | choice |
333 | prompt "Tune code generation" | |
334 | default TUNE_DEFAULT | |
335 | help | |
336 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
337 | This will make the code run faster on the selected machine but | |
338 | somewhat slower on other machines. | |
339 | This option only changes how the compiler emits instructions, not the | |
340 | selection of instructions itself, so the resulting kernel will run on | |
341 | all other machines. | |
342 | ||
343 | config TUNE_DEFAULT | |
344 | bool "Default" | |
345 | help | |
346 | Tune the generated code for the target processor for which the kernel | |
347 | will be compiled. | |
348 | ||
1db9e051 HC |
349 | config TUNE_Z900 |
350 | bool "IBM zSeries model z800 and z900" | |
351 | ||
352 | config TUNE_Z990 | |
353 | bool "IBM zSeries model z890 and z990" | |
354 | ||
355 | config TUNE_Z9_109 | |
356 | bool "IBM System z9" | |
357 | ||
358 | config TUNE_Z10 | |
359 | bool "IBM System z10" | |
360 | ||
361 | config TUNE_Z196 | |
362 | bool "IBM zEnterprise 114 and 196" | |
363 | ||
364 | config TUNE_ZEC12 | |
365 | bool "IBM zBC12 and zEC12" | |
366 | ||
f8b2dcbd MS |
367 | config TUNE_Z13 |
368 | bool "IBM z13" | |
369 | ||
6997c323 MS |
370 | config TUNE_Z14 |
371 | bool "IBM z14" | |
372 | ||
1db9e051 HC |
373 | endchoice |
374 | ||
347a8dc3 | 375 | config 64BIT |
6f9a3c33 | 376 | def_bool y |
d9f7a745 | 377 | |
843c48fd JG |
378 | config COMPAT |
379 | def_bool y | |
380 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
381 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
382 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 383 | select COMPAT_OLD_SIGACTION |
fef747ba | 384 | select HAVE_UID16 |
2813893f | 385 | depends on MULTIUSER |
843c48fd JG |
386 | help |
387 | Select this option if you want to enable your system kernel to | |
388 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
389 | (and some other stuff like libraries and such) is needed for | |
390 | executing 31 bit applications. It is safe to say "Y". | |
391 | ||
96ca7674 AB |
392 | config COMPAT_VDSO |
393 | def_bool COMPAT && !CC_IS_CLANG | |
394 | ||
843c48fd JG |
395 | config SYSVIPC_COMPAT |
396 | def_bool y if COMPAT && SYSVIPC | |
397 | ||
1da177e4 | 398 | config SMP |
6f9a3c33 MS |
399 | def_bool y |
400 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
401 | ---help--- |
402 | This enables support for systems with more than one CPU. If you have | |
403 | a system with only one CPU, like most personal computers, say N. If | |
404 | you have a system with more than one CPU, say Y. | |
405 | ||
4a474157 | 406 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
407 | machines, but will use only one CPU of a multiprocessor machine. If |
408 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 409 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
410 | will run faster if you say N here. |
411 | ||
03502faa AB |
412 | See also the SMP-HOWTO available at |
413 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
414 | |
415 | Even if you don't know what to do here, say Y. | |
416 | ||
417 | config NR_CPUS | |
5c75a0da HC |
418 | int "Maximum number of CPUs (2-512)" |
419 | range 2 512 | |
1da177e4 | 420 | depends on SMP |
5a79859a | 421 | default "64" |
1da177e4 LT |
422 | help |
423 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 424 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
425 | minimum value which makes sense is 2. |
426 | ||
427 | This is purely to save memory - each supported CPU adds | |
428 | approximately sixteen kilobytes to the kernel image. | |
429 | ||
430 | config HOTPLUG_CPU | |
6f9a3c33 MS |
431 | def_bool y |
432 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 433 | depends on SMP |
1da177e4 LT |
434 | help |
435 | Say Y here to be able to turn CPUs off and on. CPUs | |
436 | can be controlled through /sys/devices/system/cpu/cpu#. | |
437 | Say N if you want to disable CPU hotplug. | |
438 | ||
3a368f74 PH |
439 | # Some NUMA nodes have memory ranges that span |
440 | # other nodes. Even though a pfn is valid and | |
441 | # between a node's start and end pfns, it may not | |
442 | # reside on that node. See memmap_init_zone() | |
443 | # for details. <- They meant memory holes! | |
444 | config NODES_SPAN_OTHER_NODES | |
445 | def_bool NUMA | |
446 | ||
447 | config NUMA | |
448 | bool "NUMA support" | |
c095a949 | 449 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
450 | default n |
451 | help | |
452 | Enable NUMA support | |
453 | ||
454 | This option adds NUMA support to the kernel. | |
455 | ||
456 | An operation mode can be selected by appending | |
457 | numa=<method> to the kernel command line. | |
458 | ||
459 | The default behaviour is identical to appending numa=plain to | |
460 | the command line. This will create just one node with all | |
461 | available memory and all CPUs in it. | |
462 | ||
463 | config NODES_SHIFT | |
464 | int "Maximum NUMA nodes (as a power of 2)" | |
465 | range 1 10 | |
466 | depends on NUMA | |
467 | default "4" | |
468 | help | |
469 | Specify the maximum number of NUMA nodes available on the target | |
470 | system. Increases memory reserved to accommodate various tables. | |
471 | ||
c29a7baf MH |
472 | menu "Select NUMA modes" |
473 | depends on NUMA | |
474 | ||
475 | config NUMA_EMU | |
476 | bool "NUMA emulation" | |
477 | default y | |
478 | help | |
479 | Numa emulation mode will split the available system memory into | |
480 | equal chunks which then are distributed over the configured number | |
481 | of nodes in a round-robin manner. | |
482 | ||
483 | The number of fake nodes is limited by the number of available memory | |
484 | chunks (i.e. memory size / fake size) and the number of supported | |
485 | nodes in the kernel. | |
486 | ||
487 | The CPUs are assigned to the nodes in a way that partially respects | |
488 | the original machine topology (if supported by the machine). | |
489 | Fair distribution of the CPUs is not guaranteed. | |
490 | ||
491 | config EMU_SIZE | |
492 | hex "NUMA emulation memory chunk size" | |
493 | default 0x10000000 | |
494 | range 0x400000 0x100000000 | |
495 | depends on NUMA_EMU | |
496 | help | |
497 | Select the default size by which the memory is chopped and then | |
498 | assigned to emulated NUMA nodes. | |
499 | ||
500 | This can be overridden by specifying | |
501 | ||
502 | emu_size=<n> | |
503 | ||
504 | on the kernel command line where also suffixes K, M, G, and T are | |
505 | supported. | |
506 | ||
507 | endmenu | |
9236b4dd HC |
508 | |
509 | config SCHED_SMT | |
510 | def_bool n | |
c29a7baf | 511 | |
8d11e021 | 512 | config SCHED_MC |
83a24e32 | 513 | def_bool n |
8d11e021 | 514 | |
4cb14bc8 | 515 | config SCHED_BOOK |
10ad34bc MS |
516 | def_bool n |
517 | ||
adac0f1e HC |
518 | config SCHED_DRAWER |
519 | def_bool n | |
520 | ||
10ad34bc | 521 | config SCHED_TOPOLOGY |
6f9a3c33 | 522 | def_bool y |
10ad34bc | 523 | prompt "Topology scheduler support" |
83a24e32 | 524 | depends on SMP |
10ad34bc | 525 | select SCHED_SMT |
83a24e32 | 526 | select SCHED_MC |
10ad34bc | 527 | select SCHED_BOOK |
adac0f1e | 528 | select SCHED_DRAWER |
4cb14bc8 | 529 | help |
10ad34bc MS |
530 | Topology scheduler support improves the CPU scheduler's decision |
531 | making when dealing with machines that have multi-threading, | |
532 | multiple cores or multiple books. | |
4cb14bc8 | 533 | |
8636a1f9 | 534 | source "kernel/Kconfig.hz" |
1da177e4 | 535 | |
bdea9f6f PR |
536 | config KEXEC |
537 | def_bool y | |
538 | select KEXEC_CORE | |
539 | ||
540 | config KEXEC_FILE | |
541 | bool "kexec file based system call" | |
542 | select KEXEC_CORE | |
543 | select BUILD_BIN2C | |
544 | depends on CRYPTO | |
545 | depends on CRYPTO_SHA256 | |
546 | depends on CRYPTO_SHA256_S390 | |
547 | help | |
548 | Enable the kexec file based system call. In contrast to the normal | |
549 | kexec system call this system call takes file descriptors for the | |
550 | kernel and initramfs as arguments. | |
551 | ||
552 | config ARCH_HAS_KEXEC_PURGATORY | |
553 | def_bool y | |
554 | depends on KEXEC_FILE | |
555 | ||
e23a8020 PR |
556 | config KEXEC_VERIFY_SIG |
557 | bool "Verify kernel signature during kexec_file_load() syscall" | |
558 | depends on KEXEC_FILE && SYSTEM_DATA_VERIFICATION | |
559 | help | |
560 | This option makes kernel signature verification mandatory for | |
561 | the kexec_file_load() syscall. | |
562 | ||
563 | In addition to that option, you need to enable signature | |
564 | verification for the corresponding kernel image type being | |
565 | loaded in order for this to work. | |
566 | ||
4c637cd8 HF |
567 | config ARCH_RANDOM |
568 | def_bool y | |
569 | prompt "s390 architectural random number generation API" | |
570 | help | |
571 | Enable the s390 architectural random number generation API | |
572 | to provide random data for all consumers within the Linux | |
573 | kernel. | |
574 | ||
575 | When enabled the arch_random_* functions declared in linux/random.h | |
576 | are implemented. The implementation is based on the s390 CPACF | |
577 | instruction subfunction TRNG which provides a real true random | |
578 | number generator. | |
579 | ||
580 | If unsure, say Y. | |
581 | ||
d768bd89 MS |
582 | config KERNEL_NOBP |
583 | def_bool n | |
584 | prompt "Enable modified branch prediction for the kernel by default" | |
585 | help | |
586 | If this option is selected the kernel will switch to a modified | |
587 | branch prediction mode if the firmware interface is available. | |
588 | The modified branch prediction mode improves the behaviour in | |
589 | regard to speculative execution. | |
590 | ||
591 | With the option enabled the kernel parameter "nobp=0" or "nospec" | |
592 | can be used to run the kernel in the normal branch prediction mode. | |
593 | ||
594 | With the option disabled the modified branch prediction mode is | |
595 | enabled with the "nobp=1" kernel parameter. | |
596 | ||
597 | If unsure, say N. | |
598 | ||
f19fbd5e MS |
599 | config EXPOLINE |
600 | def_bool n | |
601 | prompt "Avoid speculative indirect branches in the kernel" | |
602 | help | |
603 | Compile the kernel with the expoline compiler options to guard | |
604 | against kernel-to-user data leaks by avoiding speculative indirect | |
605 | branches. | |
606 | Requires a compiler with -mindirect-branch=thunk support for full | |
607 | protection. The kernel may run slower. | |
608 | ||
609 | If unsure, say N. | |
610 | ||
611 | choice | |
612 | prompt "Expoline default" | |
613 | depends on EXPOLINE | |
614 | default EXPOLINE_FULL | |
615 | ||
616 | config EXPOLINE_OFF | |
617 | bool "spectre_v2=off" | |
618 | ||
6e179d64 | 619 | config EXPOLINE_AUTO |
f19fbd5e MS |
620 | bool "spectre_v2=auto" |
621 | ||
622 | config EXPOLINE_FULL | |
623 | bool "spectre_v2=on" | |
624 | ||
625 | endchoice | |
626 | ||
805bc0bc GS |
627 | config RELOCATABLE |
628 | bool "Build a relocatable kernel" | |
629 | select MODULE_REL_CRCS if MODVERSIONS | |
630 | default y | |
631 | help | |
632 | This builds a kernel image that retains relocation information | |
633 | so it can be loaded at an arbitrary address. | |
634 | The kernel is linked as a position-independent executable (PIE) | |
635 | and contains dynamic relocations which are processed early in the | |
636 | bootup process. | |
637 | The relocations make the kernel image about 15% larger (compressed | |
638 | 10%), but are discarded at runtime. | |
639 | ||
b2d24b97 GS |
640 | config RANDOMIZE_BASE |
641 | bool "Randomize the address of the kernel image (KASLR)" | |
642 | depends on RELOCATABLE | |
643 | default y | |
644 | help | |
645 | In support of Kernel Address Space Layout Randomization (KASLR), | |
646 | this randomizes the address at which the kernel image is loaded, | |
647 | as a security feature that deters exploit attempts relying on | |
648 | knowledge of the location of kernel internals. | |
649 | ||
843c48fd | 650 | endmenu |
1da177e4 | 651 | |
843c48fd | 652 | menu "Memory setup" |
1d057720 | 653 | |
843c48fd | 654 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 655 | def_bool y |
843c48fd JG |
656 | select SPARSEMEM_VMEMMAP_ENABLE |
657 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 658 | |
843c48fd JG |
659 | config ARCH_SPARSEMEM_DEFAULT |
660 | def_bool y | |
1da177e4 | 661 | |
843c48fd JG |
662 | config ARCH_SELECT_MEMORY_MODEL |
663 | def_bool y | |
1da177e4 | 664 | |
843c48fd JG |
665 | config ARCH_ENABLE_MEMORY_HOTPLUG |
666 | def_bool y if SPARSEMEM | |
0efa4703 | 667 | |
843c48fd JG |
668 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
669 | def_bool y | |
e37f50e1 | 670 | |
ec66ad66 MS |
671 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
672 | def_bool y | |
ec66ad66 | 673 | |
843c48fd JG |
674 | config FORCE_MAX_ZONEORDER |
675 | int | |
676 | default "9" | |
f861e405 | 677 | |
b8402b95 HC |
678 | config MAX_PHYSMEM_BITS |
679 | int "Maximum size of supported physical memory in bits (42-53)" | |
680 | range 42 53 | |
681 | default "46" | |
682 | help | |
683 | This option specifies the maximum supported size of physical memory | |
684 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
685 | Increasing the number of bits also increases the kernel image size. | |
686 | By default 46 bits (64TB) are supported. | |
687 | ||
1da177e4 | 688 | config PACK_STACK |
6f9a3c33 MS |
689 | def_bool y |
690 | prompt "Pack kernel stack" | |
1da177e4 LT |
691 | help |
692 | This option enables the compiler option -mkernel-backchain if it | |
693 | is available. If the option is available the compiler supports | |
694 | the new stack layout which dramatically reduces the minimum stack | |
695 | frame size. With an old compiler a non-leaf function needs a | |
696 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
697 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
698 | and 24 byte on 64 bit. | |
699 | ||
700 | Say Y if you are unsure. | |
701 | ||
1da177e4 | 702 | config CHECK_STACK |
6f9a3c33 | 703 | def_bool y |
ce3dc447 | 704 | depends on !VMAP_STACK |
6f9a3c33 | 705 | prompt "Detect kernel stack overflow" |
1da177e4 LT |
706 | help |
707 | This option enables the compiler option -mstack-guard and | |
708 | -mstack-size if they are available. If the compiler supports them | |
709 | it will emit additional code to each function prolog to trigger | |
710 | an illegal operation if the kernel stack is about to overflow. | |
711 | ||
712 | Say N if you are unsure. | |
713 | ||
714 | config STACK_GUARD | |
715 | int "Size of the guard area (128-1024)" | |
716 | range 128 1024 | |
717 | depends on CHECK_STACK | |
718 | default "256" | |
719 | help | |
720 | This allows you to specify the size of the guard area at the lower | |
721 | end of the kernel stack. If the kernel stack points into the guard | |
722 | area on function entry an illegal operation is triggered. The size | |
723 | needs to be a power of 2. Please keep in mind that the size of an | |
724 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
725 | The minimum size for the stack guard should be 256 for 31 bit and | |
726 | 512 for 64 bit. | |
727 | ||
2c190da4 | 728 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 729 | def_bool n |
2c190da4 | 730 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 731 | help |
2c190da4 JG |
732 | This option enables the compiler option -mwarn-dynamicstack. If the |
733 | compiler supports this options generates warnings for functions | |
734 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
735 | |
736 | Say N if you are unsure. | |
737 | ||
843c48fd | 738 | endmenu |
3f22ab27 | 739 | |
843c48fd | 740 | menu "I/O subsystem" |
1da177e4 | 741 | |
1da177e4 | 742 | config QDIO |
6f9a3c33 MS |
743 | def_tristate y |
744 | prompt "QDIO support" | |
1da177e4 | 745 | ---help--- |
8129ee16 | 746 | This driver provides the Queued Direct I/O base support for |
efca13bc | 747 | IBM System z. |
1da177e4 LT |
748 | |
749 | To compile this driver as a module, choose M here: the | |
750 | module will be called qdio. | |
751 | ||
752 | If unsure, say Y. | |
753 | ||
c8717a3d JG |
754 | if PCI |
755 | ||
756 | config PCI_NR_FUNCTIONS | |
757 | int "Maximum number of PCI functions (1-4096)" | |
758 | range 1 4096 | |
b18601b0 | 759 | default "128" |
c8717a3d JG |
760 | help |
761 | This allows you to specify the maximum number of PCI functions which | |
762 | this kernel will support. | |
763 | ||
c8717a3d JG |
764 | endif # PCI |
765 | ||
c8717a3d JG |
766 | config HAS_IOMEM |
767 | def_bool PCI | |
768 | ||
9d92a7e1 | 769 | config CHSC_SCH |
d9c11b1e | 770 | def_tristate m |
6f9a3c33 | 771 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
772 | help |
773 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
774 | is usually present on LPAR only. | |
775 | The driver creates a device /dev/chsc, which may be used to | |
776 | obtain I/O configuration information about the machine and | |
777 | to issue asynchronous chsc commands (DANGEROUS). | |
778 | You will usually only want to use this interface on a special | |
779 | LPAR designated for system management. | |
780 | ||
781 | To compile this driver as a module, choose M here: the | |
782 | module will be called chsc_sch. | |
783 | ||
784 | If unsure, say N. | |
785 | ||
1d1c8f78 SO |
786 | config SCM_BUS |
787 | def_bool y | |
1d1c8f78 SO |
788 | prompt "SCM bus driver" |
789 | help | |
790 | Bus driver for Storage Class Memory. | |
791 | ||
eadb86ab SO |
792 | config EADM_SCH |
793 | def_tristate m | |
794 | prompt "Support for EADM subchannels" | |
795 | depends on SCM_BUS | |
796 | help | |
797 | This driver allows usage of EADM subchannels. EADM subchannels act | |
798 | as a communication vehicle for SCM increments. | |
799 | ||
800 | To compile this driver as a module, choose M here: the | |
801 | module will be called eadm_sch. | |
802 | ||
63f1934d DJS |
803 | config VFIO_CCW |
804 | def_tristate n | |
805 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 806 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
807 | help |
808 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
809 | ||
810 | To compile this driver as a module, choose M here: the | |
811 | module will be called vfio_ccw. | |
812 | ||
1fde5734 TK |
813 | config VFIO_AP |
814 | def_tristate n | |
815 | prompt "VFIO support for AP devices" | |
816 | depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM | |
817 | help | |
818 | This driver grants access to Adjunct Processor (AP) devices | |
819 | via the VFIO mediated device interface. | |
820 | ||
821 | To compile this driver as a module, choose M here: the module | |
822 | will be called vfio_ap. | |
823 | ||
843c48fd JG |
824 | endmenu |
825 | ||
826 | menu "Dump support" | |
827 | ||
828 | config CRASH_DUMP | |
829 | bool "kernel crash dumps" | |
5a79859a | 830 | depends on SMP |
843c48fd JG |
831 | select KEXEC |
832 | help | |
833 | Generate crash dump after being started by kexec. | |
834 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
835 | into a specially reserved region and then later executed after | |
836 | a crash by kdump/kexec. | |
843c48fd | 837 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
838 | This option also enables s390 zfcpdump. |
839 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
840 | |
841 | endmenu | |
842 | ||
843c48fd JG |
843 | config SECCOMP |
844 | def_bool y | |
845 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
846 | depends on PROC_FS | |
847 | help | |
848 | This kernel feature is useful for number crunching applications | |
849 | that may need to compute untrusted bytecode during their | |
850 | execution. By using pipes or other transports made available to | |
851 | the process as file descriptors supporting the read/write | |
852 | syscalls, it's possible to isolate those applications in | |
853 | their own address space using seccomp. Once seccomp is | |
854 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
855 | and the task is only allowed to execute a few safe syscalls | |
856 | defined by each seccomp mode. | |
857 | ||
858 | If unsure, say Y. | |
859 | ||
843c48fd JG |
860 | menu "Power Management" |
861 | ||
862 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 863 | def_bool y |
843c48fd JG |
864 | |
865 | source "kernel/power/Kconfig" | |
866 | ||
867 | endmenu | |
868 | ||
843c48fd JG |
869 | config CCW |
870 | def_bool y | |
871 | ||
b6ef86e9 UB |
872 | config HAVE_PNETID |
873 | tristate | |
874 | default (SMC || CCWGROUP) | |
875 | ||
843c48fd | 876 | menu "Virtualization" |
684de39b | 877 | |
5abb9351 VG |
878 | config PROTECTED_VIRTUALIZATION_GUEST |
879 | def_bool n | |
880 | prompt "Protected virtualization guest support" | |
881 | help | |
882 | Select this option, if you want to be able to run this | |
883 | kernel as a protected virtualization KVM guest. | |
884 | Protected virtualization capable machines have a mini hypervisor | |
885 | located at machine level (an ultravisor). With help of the | |
886 | Ultravisor, KVM will be able to run "protected" VMs, special | |
887 | VMs whose memory and management data are unavailable to KVM. | |
888 | ||
1da177e4 | 889 | config PFAULT |
6f9a3c33 MS |
890 | def_bool y |
891 | prompt "Pseudo page fault support" | |
1da177e4 LT |
892 | help |
893 | Select this option, if you want to use PFAULT pseudo page fault | |
894 | handling under VM. If running native or in LPAR, this option | |
895 | has no effect. If your VM does not support PFAULT, PAGEEX | |
896 | pseudo page fault handling will be used. | |
897 | Note that VM 4.2 supports PFAULT but has a bug in its | |
898 | implementation that causes some problems. | |
899 | Everybody who wants to run Linux under VM != VM4.2 should select | |
900 | this option. | |
901 | ||
1da177e4 | 902 | config CMM |
6f9a3c33 MS |
903 | def_tristate n |
904 | prompt "Cooperative memory management" | |
1da177e4 LT |
905 | help |
906 | Select this option, if you want to enable the kernel interface | |
907 | to reduce the memory size of the system. This is accomplished | |
908 | by allocating pages of memory and put them "on hold". This only | |
909 | makes sense for a system running under VM where the unused pages | |
910 | will be reused by VM for other guest systems. The interface | |
911 | allows an external monitor to balance memory of many systems. | |
912 | Everybody who wants to run Linux under VM should select this | |
913 | option. | |
914 | ||
1da177e4 | 915 | config CMM_IUCV |
6f9a3c33 MS |
916 | def_bool y |
917 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
918 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
919 | help | |
920 | Select this option to enable the special message interface to | |
921 | the cooperative memory management. | |
922 | ||
1da177e4 | 923 | config APPLDATA_BASE |
6f9a3c33 MS |
924 | def_bool n |
925 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 926 | depends on PROC_FS |
1da177e4 LT |
927 | help |
928 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
929 | monitor records. The monitor records are updated at certain time | |
930 | intervals, once the timer is started. | |
931 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
932 | i.e. enables or disables monitoring on the Linux side. | |
933 | A custom interval value (in seconds) can be written to | |
934 | /proc/appldata/interval. | |
935 | ||
936 | Defaults are 60 seconds interval and timer off. | |
937 | The /proc entries can also be read from, showing the current settings. | |
938 | ||
939 | config APPLDATA_MEM | |
6f9a3c33 MS |
940 | def_tristate m |
941 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 942 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
943 | help |
944 | This provides memory management related data to the Linux - VM Monitor | |
945 | Stream, like paging/swapping rate, memory utilisation, etc. | |
946 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
947 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
948 | on the z/VM side. | |
949 | ||
950 | Default is disabled. | |
951 | The /proc entry can also be read from, showing the current settings. | |
952 | ||
953 | This can also be compiled as a module, which will be called | |
954 | appldata_mem.o. | |
955 | ||
956 | config APPLDATA_OS | |
6f9a3c33 MS |
957 | def_tristate m |
958 | prompt "Monitor OS statistics" | |
1da177e4 LT |
959 | depends on APPLDATA_BASE |
960 | help | |
961 | This provides OS related data to the Linux - VM Monitor Stream, like | |
962 | CPU utilisation, etc. | |
963 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
964 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
965 | on the z/VM side. | |
966 | ||
967 | Default is disabled. | |
968 | This can also be compiled as a module, which will be called | |
969 | appldata_os.o. | |
970 | ||
971 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
972 | def_tristate m |
973 | prompt "Monitor overall network statistics" | |
70193af9 | 974 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
975 | help |
976 | This provides network related data to the Linux - VM Monitor Stream, | |
977 | currently there is only a total sum of network I/O statistics, no | |
978 | per-interface data. | |
979 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
980 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
981 | on the z/VM side. | |
982 | ||
983 | Default is disabled. | |
984 | This can also be compiled as a module, which will be called | |
985 | appldata_net_sum.o. | |
986 | ||
24bbb1fa | 987 | config S390_HYPFS_FS |
6f9a3c33 MS |
988 | def_bool y |
989 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 990 | select SYS_HYPERVISOR |
24bbb1fa MH |
991 | help |
992 | This is a virtual file system intended to provide accounting | |
993 | information in an s390 hypervisor environment. | |
994 | ||
843c48fd | 995 | source "arch/s390/kvm/Kconfig" |
411ed322 | 996 | |
fa587743 | 997 | config S390_GUEST |
6f9a3c33 | 998 | def_bool y |
510cf5a6 | 999 | prompt "s390 support for virtio devices" |
79b6f7fb | 1000 | select TTY |
80629b0b | 1001 | select VIRTUALIZATION |
fa587743 | 1002 | select VIRTIO |
faeba830 | 1003 | select VIRTIO_CONSOLE |
fa587743 | 1004 | help |
bdd1fc27 CH |
1005 | Enabling this option adds support for virtio based paravirtual device |
1006 | drivers on s390. | |
1da177e4 | 1007 | |
20766c08 | 1008 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 1009 | the KVM hypervisor. |
155af2f9 HJP |
1010 | |
1011 | endmenu |