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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 | |
f0d1b0b3 | 17 | config ARCH_HAS_ILOG2_U32 |
6f9a3c33 | 18 | def_bool n |
f0d1b0b3 DH |
19 | |
20 | config ARCH_HAS_ILOG2_U64 | |
6f9a3c33 | 21 | def_bool n |
f0d1b0b3 | 22 | |
7e33db4e | 23 | config GENERIC_HWEIGHT |
61d48c2c | 24 | def_bool y |
7e33db4e | 25 | |
c0007f1a | 26 | config GENERIC_BUG |
6f9a3c33 | 27 | def_bool y if BUG |
c0007f1a | 28 | |
52499f40 HC |
29 | config GENERIC_BUG_RELATIVE_POINTERS |
30 | def_bool y | |
31 | ||
b6b40c53 | 32 | config GENERIC_LOCKBREAK |
6f9a3c33 | 33 | def_bool y if SMP && PREEMPT |
b6b40c53 | 34 | |
402b0862 | 35 | config PGSTE |
6f9a3c33 | 36 | def_bool y if KVM |
402b0862 | 37 | |
6a11f75b AM |
38 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
39 | def_bool y | |
40 | ||
843c48fd JG |
41 | config AUDIT_ARCH |
42 | def_bool y | |
43 | ||
ce816fa8 | 44 | config NO_IOPORT_MAP |
c8717a3d JG |
45 | def_bool y |
46 | ||
47 | config PCI_QUIRKS | |
48 | def_bool n | |
49 | ||
2a0a5b22 | 50 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 51 | def_bool y |
2a0a5b22 | 52 | |
5e785963 VG |
53 | config KASAN_SHADOW_OFFSET |
54 | hex | |
55 | depends on KASAN | |
5dff0381 | 56 | default 0x18000000000000 if KASAN_S390_4_LEVEL_PAGING |
5e785963 VG |
57 | default 0x30000000000 |
58 | ||
347a8dc3 | 59 | config S390 |
61d48c2c | 60 | def_bool y |
23fefe11 | 61 | select ARCH_BINFMT_ELF_STATE |
21266be9 | 62 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 63 | select ARCH_HAS_ELF_RANDOMIZE |
79962038 | 64 | select ARCH_HAS_FORTIFY_SOURCE |
957e3fac | 65 | select ARCH_HAS_GCOV_PROFILE_ALL |
4eb0716e | 66 | select ARCH_HAS_GIGANTIC_PAGE |
907fa061 | 67 | select ARCH_HAS_KCOV |
3010a5ea | 68 | select ARCH_HAS_PTE_SPECIAL |
d2852a22 | 69 | select ARCH_HAS_SET_MEMORY |
ad21fc4f LA |
70 | select ARCH_HAS_STRICT_KERNEL_RWX |
71 | select ARCH_HAS_STRICT_MODULE_RWX | |
aa0d6e70 | 72 | select ARCH_HAS_SYSCALL_WRAPPER |
c42d8c7d | 73 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 74 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
75 | select ARCH_INLINE_READ_LOCK |
76 | select ARCH_INLINE_READ_LOCK_BH | |
77 | select ARCH_INLINE_READ_LOCK_IRQ | |
78 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 79 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
80 | select ARCH_INLINE_READ_UNLOCK |
81 | select ARCH_INLINE_READ_UNLOCK_BH | |
82 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
83 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
84 | select ARCH_INLINE_SPIN_LOCK |
85 | select ARCH_INLINE_SPIN_LOCK_BH | |
86 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
87 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
88 | select ARCH_INLINE_SPIN_TRYLOCK | |
89 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
90 | select ARCH_INLINE_SPIN_UNLOCK | |
91 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
92 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
93 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
94 | select ARCH_INLINE_WRITE_LOCK |
95 | select ARCH_INLINE_WRITE_LOCK_BH | |
96 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
97 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 98 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
99 | select ARCH_INLINE_WRITE_UNLOCK |
100 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
101 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
102 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
350e88ba | 103 | select ARCH_KEEP_MEMBLOCK |
0e0d04a8 | 104 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 105 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 106 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 107 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 108 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 109 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
c1d7e01d | 110 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
111 | select BUILDTIME_EXTABLE_SORT |
112 | select CLONE_BACKWARDS2 | |
5d6a0163 | 113 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 114 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 115 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 116 | select GENERIC_CPU_DEVICES if !SMP |
d424986f | 117 | select GENERIC_CPU_VULNERABILITIES |
746479cd | 118 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 119 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 120 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 121 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 122 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 123 | select HAVE_ARCH_JUMP_LABEL |
13ddb52c | 124 | select HAVE_ARCH_JUMP_LABEL_RELATIVE |
42db5ed8 | 125 | select HAVE_ARCH_KASAN |
fff7fb0b | 126 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 127 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 128 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 129 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 130 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
ce3dc447 | 131 | select HAVE_ARCH_VMAP_STACK |
6077776b | 132 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
133 | select HAVE_CMPXCHG_DOUBLE |
134 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 135 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 136 | select HAVE_DEBUG_KMEMLEAK |
e1231b0e | 137 | select HAVE_DMA_CONTIGUOUS |
5a79859a HC |
138 | select HAVE_DYNAMIC_FTRACE |
139 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 140 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
d983c89c | 141 | select HAVE_FENTRY |
0e0d04a8 | 142 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
143 | select HAVE_FUNCTION_GRAPH_TRACER |
144 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 145 | select HAVE_FUTEX_CMPXCHG if FUTEX |
bc00b3ec | 146 | select HAVE_GCC_PLUGINS |
1a42010c | 147 | select HAVE_GENERIC_GUP |
0e0d04a8 HC |
148 | select HAVE_KERNEL_BZIP2 |
149 | select HAVE_KERNEL_GZIP | |
8e2872ce | 150 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
151 | select HAVE_KERNEL_LZMA |
152 | select HAVE_KERNEL_LZO | |
89b5202e | 153 | select HAVE_KERNEL_UNCOMPRESSED |
0e0d04a8 HC |
154 | select HAVE_KERNEL_XZ |
155 | select HAVE_KPROBES | |
156 | select HAVE_KRETPROBES | |
5a79859a | 157 | select HAVE_KVM |
21042d43 | 158 | select HAVE_LIVEPATCH |
c33eff60 HC |
159 | select HAVE_PERF_REGS |
160 | select HAVE_PERF_USER_STACK_DUMP | |
0e0d04a8 | 161 | select HAVE_MEMBLOCK_NODE_MAP |
50be6345 | 162 | select HAVE_MEMBLOCK_PHYS_MAP |
9de7d833 | 163 | select HAVE_MMU_GATHER_NO_GATHER |
786d35d4 | 164 | select HAVE_MOD_ARCH_SPECIFIC |
d983c89c | 165 | select HAVE_NOP_MCOUNT |
0e0d04a8 | 166 | select HAVE_OPROFILE |
eb01d42a | 167 | select HAVE_PCI |
0e0d04a8 | 168 | select HAVE_PERF_EVENTS |
9de7d833 | 169 | select HAVE_RCU_TABLE_FREE |
0e0d04a8 | 170 | select HAVE_REGS_AND_STACK_ACCESS_API |
9d6d99e3 | 171 | select HAVE_RSEQ |
0e0d04a8 | 172 | select HAVE_SYSCALL_TRACEPOINTS |
0e0d04a8 | 173 | select HAVE_VIRT_CPU_ACCOUNTING |
eb01d42a CH |
174 | select IOMMU_HELPER if PCI |
175 | select IOMMU_SUPPORT if PCI | |
786d35d4 | 176 | select MODULES_USE_ELF_RELA |
eb01d42a CH |
177 | select NEED_DMA_MAP_STATE if PCI |
178 | select NEED_SG_DMA_LENGTH if PCI | |
7eddd99c | 179 | select OLD_SIGACTION |
93bead43 | 180 | select OLD_SIGSUSPEND3 |
2eac9c2d | 181 | select PCI_DOMAINS if PCI |
eb01d42a | 182 | select PCI_MSI if PCI |
bb98f396 | 183 | select SPARSE_IRQ |
0e0d04a8 | 184 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 185 | select THREAD_INFO_IN_TASK |
0563416b | 186 | select TTY |
0e0d04a8 | 187 | select VIRT_CPU_ACCOUNTING |
40565b5a | 188 | select ARCH_HAS_SCALED_CPUTIME |
42a0bb3f | 189 | select HAVE_NMI |
3a368f74 | 190 | |
1da177e4 | 191 | |
fca3e357 | 192 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 193 | def_bool y |
fca3e357 | 194 | |
c81956c9 KS |
195 | config PGTABLE_LEVELS |
196 | int | |
1aea9b3f | 197 | default 5 |
c81956c9 | 198 | |
21042d43 JS |
199 | source "kernel/livepatch/Kconfig" |
200 | ||
843c48fd JG |
201 | menu "Processor type and features" |
202 | ||
203 | config HAVE_MARCH_Z900_FEATURES | |
204 | def_bool n | |
205 | ||
206 | config HAVE_MARCH_Z990_FEATURES | |
207 | def_bool n | |
208 | select HAVE_MARCH_Z900_FEATURES | |
209 | ||
210 | config HAVE_MARCH_Z9_109_FEATURES | |
211 | def_bool n | |
212 | select HAVE_MARCH_Z990_FEATURES | |
213 | ||
214 | config HAVE_MARCH_Z10_FEATURES | |
215 | def_bool n | |
216 | select HAVE_MARCH_Z9_109_FEATURES | |
217 | ||
218 | config HAVE_MARCH_Z196_FEATURES | |
219 | def_bool n | |
220 | select HAVE_MARCH_Z10_FEATURES | |
221 | ||
991c1505 HC |
222 | config HAVE_MARCH_ZEC12_FEATURES |
223 | def_bool n | |
224 | select HAVE_MARCH_Z196_FEATURES | |
225 | ||
f8b2dcbd MS |
226 | config HAVE_MARCH_Z13_FEATURES |
227 | def_bool n | |
228 | select HAVE_MARCH_ZEC12_FEATURES | |
229 | ||
6997c323 MS |
230 | config HAVE_MARCH_Z14_FEATURES |
231 | def_bool n | |
232 | select HAVE_MARCH_Z13_FEATURES | |
233 | ||
843c48fd JG |
234 | choice |
235 | prompt "Processor type" | |
7072276e | 236 | default MARCH_Z196 |
1da177e4 | 237 | |
843c48fd JG |
238 | config MARCH_Z900 |
239 | bool "IBM zSeries model z800 and z900" | |
c263a4e9 | 240 | depends on !CC_IS_CLANG |
5a79859a | 241 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
242 | help |
243 | Select this to enable optimizations for model z800/z900 (2064 and | |
244 | 2066 series). This will enable some optimizations that are not | |
245 | available on older ESA/390 (31 Bit) only CPUs. | |
246 | ||
247 | config MARCH_Z990 | |
248 | bool "IBM zSeries model z890 and z990" | |
c263a4e9 | 249 | depends on !CC_IS_CLANG |
5a79859a | 250 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
251 | help |
252 | Select this to enable optimizations for model z890/z990 (2084 and | |
253 | 2086 series). The kernel will be slightly faster but will not work | |
254 | on older machines. | |
255 | ||
256 | config MARCH_Z9_109 | |
257 | bool "IBM System z9" | |
c263a4e9 | 258 | depends on !CC_IS_CLANG |
5a79859a | 259 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
260 | help |
261 | Select this to enable optimizations for IBM System z9 (2094 and | |
262 | 2096 series). The kernel will be slightly faster but will not work | |
263 | on older machines. | |
264 | ||
265 | config MARCH_Z10 | |
266 | bool "IBM System z10" | |
5a79859a | 267 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
268 | help |
269 | Select this to enable optimizations for IBM System z10 (2097 and | |
270 | 2098 series). The kernel will be slightly faster but will not work | |
271 | on older machines. | |
272 | ||
273 | config MARCH_Z196 | |
274 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 275 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
276 | help |
277 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
278 | (2818 and 2817 series). The kernel will be slightly faster but will | |
279 | not work on older machines. | |
1da177e4 | 280 | |
991c1505 | 281 | config MARCH_ZEC12 |
59471227 | 282 | bool "IBM zBC12 and zEC12" |
5a79859a | 283 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 284 | help |
59471227 HC |
285 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
286 | 2827 series). The kernel will be slightly faster but will not work on | |
287 | older machines. | |
991c1505 | 288 | |
f8b2dcbd | 289 | config MARCH_Z13 |
bb3aa614 | 290 | bool "IBM z13s and z13" |
5a79859a | 291 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 292 | help |
bb3aa614 HC |
293 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
294 | 2964 series). The kernel will be slightly faster but will not work on | |
295 | older machines. | |
f8b2dcbd | 296 | |
6997c323 | 297 | config MARCH_Z14 |
451239eb | 298 | bool "IBM z14 ZR1 and z14" |
6997c323 MS |
299 | select HAVE_MARCH_Z14_FEATURES |
300 | help | |
451239eb HC |
301 | Select this to enable optimizations for IBM z14 ZR1 and z14 (3907 |
302 | and 3906 series). The kernel will be slightly faster but will not | |
303 | work on older machines. | |
6997c323 | 304 | |
843c48fd | 305 | endchoice |
1da177e4 | 306 | |
1db9e051 HC |
307 | config MARCH_Z900_TUNE |
308 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
309 | ||
310 | config MARCH_Z990_TUNE | |
311 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
312 | ||
313 | config MARCH_Z9_109_TUNE | |
314 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
315 | ||
316 | config MARCH_Z10_TUNE | |
317 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
318 | ||
319 | config MARCH_Z196_TUNE | |
320 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
321 | ||
322 | config MARCH_ZEC12_TUNE | |
323 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
324 | ||
f8b2dcbd MS |
325 | config MARCH_Z13_TUNE |
326 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
327 | ||
6997c323 MS |
328 | config MARCH_Z14_TUNE |
329 | def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
330 | ||
1db9e051 HC |
331 | choice |
332 | prompt "Tune code generation" | |
333 | default TUNE_DEFAULT | |
334 | help | |
335 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
336 | This will make the code run faster on the selected machine but | |
337 | somewhat slower on other machines. | |
338 | This option only changes how the compiler emits instructions, not the | |
339 | selection of instructions itself, so the resulting kernel will run on | |
340 | all other machines. | |
341 | ||
342 | config TUNE_DEFAULT | |
343 | bool "Default" | |
344 | help | |
345 | Tune the generated code for the target processor for which the kernel | |
346 | will be compiled. | |
347 | ||
1db9e051 HC |
348 | config TUNE_Z900 |
349 | bool "IBM zSeries model z800 and z900" | |
c263a4e9 | 350 | depends on !CC_IS_CLANG |
1db9e051 HC |
351 | |
352 | config TUNE_Z990 | |
353 | bool "IBM zSeries model z890 and z990" | |
c263a4e9 | 354 | depends on !CC_IS_CLANG |
1db9e051 HC |
355 | |
356 | config TUNE_Z9_109 | |
357 | bool "IBM System z9" | |
c263a4e9 | 358 | depends on !CC_IS_CLANG |
1db9e051 HC |
359 | |
360 | config TUNE_Z10 | |
361 | bool "IBM System z10" | |
362 | ||
363 | config TUNE_Z196 | |
364 | bool "IBM zEnterprise 114 and 196" | |
365 | ||
366 | config TUNE_ZEC12 | |
367 | bool "IBM zBC12 and zEC12" | |
368 | ||
f8b2dcbd MS |
369 | config TUNE_Z13 |
370 | bool "IBM z13" | |
371 | ||
6997c323 MS |
372 | config TUNE_Z14 |
373 | bool "IBM z14" | |
374 | ||
1db9e051 HC |
375 | endchoice |
376 | ||
347a8dc3 | 377 | config 64BIT |
6f9a3c33 | 378 | def_bool y |
d9f7a745 | 379 | |
843c48fd JG |
380 | config COMPAT |
381 | def_bool y | |
382 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
383 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
384 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 385 | select COMPAT_OLD_SIGACTION |
fef747ba | 386 | select HAVE_UID16 |
2813893f | 387 | depends on MULTIUSER |
843c48fd JG |
388 | help |
389 | Select this option if you want to enable your system kernel to | |
390 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
391 | (and some other stuff like libraries and such) is needed for | |
392 | executing 31 bit applications. It is safe to say "Y". | |
393 | ||
96ca7674 AB |
394 | config COMPAT_VDSO |
395 | def_bool COMPAT && !CC_IS_CLANG | |
396 | ||
843c48fd JG |
397 | config SYSVIPC_COMPAT |
398 | def_bool y if COMPAT && SYSVIPC | |
399 | ||
1da177e4 | 400 | config SMP |
6f9a3c33 MS |
401 | def_bool y |
402 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
403 | ---help--- |
404 | This enables support for systems with more than one CPU. If you have | |
405 | a system with only one CPU, like most personal computers, say N. If | |
406 | you have a system with more than one CPU, say Y. | |
407 | ||
4a474157 | 408 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
409 | machines, but will use only one CPU of a multiprocessor machine. If |
410 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 411 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
412 | will run faster if you say N here. |
413 | ||
03502faa AB |
414 | See also the SMP-HOWTO available at |
415 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
416 | |
417 | Even if you don't know what to do here, say Y. | |
418 | ||
419 | config NR_CPUS | |
5c75a0da HC |
420 | int "Maximum number of CPUs (2-512)" |
421 | range 2 512 | |
1da177e4 | 422 | depends on SMP |
5a79859a | 423 | default "64" |
1da177e4 LT |
424 | help |
425 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 426 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
427 | minimum value which makes sense is 2. |
428 | ||
429 | This is purely to save memory - each supported CPU adds | |
430 | approximately sixteen kilobytes to the kernel image. | |
431 | ||
432 | config HOTPLUG_CPU | |
6f9a3c33 MS |
433 | def_bool y |
434 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 435 | depends on SMP |
1da177e4 LT |
436 | help |
437 | Say Y here to be able to turn CPUs off and on. CPUs | |
438 | can be controlled through /sys/devices/system/cpu/cpu#. | |
439 | Say N if you want to disable CPU hotplug. | |
440 | ||
3a368f74 PH |
441 | # Some NUMA nodes have memory ranges that span |
442 | # other nodes. Even though a pfn is valid and | |
443 | # between a node's start and end pfns, it may not | |
444 | # reside on that node. See memmap_init_zone() | |
445 | # for details. <- They meant memory holes! | |
446 | config NODES_SPAN_OTHER_NODES | |
447 | def_bool NUMA | |
448 | ||
449 | config NUMA | |
450 | bool "NUMA support" | |
c095a949 | 451 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
452 | default n |
453 | help | |
454 | Enable NUMA support | |
455 | ||
456 | This option adds NUMA support to the kernel. | |
457 | ||
458 | An operation mode can be selected by appending | |
459 | numa=<method> to the kernel command line. | |
460 | ||
461 | The default behaviour is identical to appending numa=plain to | |
462 | the command line. This will create just one node with all | |
463 | available memory and all CPUs in it. | |
464 | ||
465 | config NODES_SHIFT | |
466 | int "Maximum NUMA nodes (as a power of 2)" | |
467 | range 1 10 | |
468 | depends on NUMA | |
469 | default "4" | |
470 | help | |
471 | Specify the maximum number of NUMA nodes available on the target | |
472 | system. Increases memory reserved to accommodate various tables. | |
473 | ||
c29a7baf MH |
474 | menu "Select NUMA modes" |
475 | depends on NUMA | |
476 | ||
477 | config NUMA_EMU | |
478 | bool "NUMA emulation" | |
479 | default y | |
480 | help | |
481 | Numa emulation mode will split the available system memory into | |
482 | equal chunks which then are distributed over the configured number | |
483 | of nodes in a round-robin manner. | |
484 | ||
485 | The number of fake nodes is limited by the number of available memory | |
486 | chunks (i.e. memory size / fake size) and the number of supported | |
487 | nodes in the kernel. | |
488 | ||
489 | The CPUs are assigned to the nodes in a way that partially respects | |
490 | the original machine topology (if supported by the machine). | |
491 | Fair distribution of the CPUs is not guaranteed. | |
492 | ||
493 | config EMU_SIZE | |
494 | hex "NUMA emulation memory chunk size" | |
495 | default 0x10000000 | |
496 | range 0x400000 0x100000000 | |
497 | depends on NUMA_EMU | |
498 | help | |
499 | Select the default size by which the memory is chopped and then | |
500 | assigned to emulated NUMA nodes. | |
501 | ||
502 | This can be overridden by specifying | |
503 | ||
504 | emu_size=<n> | |
505 | ||
506 | on the kernel command line where also suffixes K, M, G, and T are | |
507 | supported. | |
508 | ||
509 | endmenu | |
9236b4dd HC |
510 | |
511 | config SCHED_SMT | |
512 | def_bool n | |
c29a7baf | 513 | |
8d11e021 | 514 | config SCHED_MC |
83a24e32 | 515 | def_bool n |
8d11e021 | 516 | |
4cb14bc8 | 517 | config SCHED_BOOK |
10ad34bc MS |
518 | def_bool n |
519 | ||
adac0f1e HC |
520 | config SCHED_DRAWER |
521 | def_bool n | |
522 | ||
10ad34bc | 523 | config SCHED_TOPOLOGY |
6f9a3c33 | 524 | def_bool y |
10ad34bc | 525 | prompt "Topology scheduler support" |
83a24e32 | 526 | depends on SMP |
10ad34bc | 527 | select SCHED_SMT |
83a24e32 | 528 | select SCHED_MC |
10ad34bc | 529 | select SCHED_BOOK |
adac0f1e | 530 | select SCHED_DRAWER |
4cb14bc8 | 531 | help |
10ad34bc MS |
532 | Topology scheduler support improves the CPU scheduler's decision |
533 | making when dealing with machines that have multi-threading, | |
534 | multiple cores or multiple books. | |
4cb14bc8 | 535 | |
8636a1f9 | 536 | source "kernel/Kconfig.hz" |
1da177e4 | 537 | |
bdea9f6f PR |
538 | config KEXEC |
539 | def_bool y | |
540 | select KEXEC_CORE | |
541 | ||
542 | config KEXEC_FILE | |
543 | bool "kexec file based system call" | |
544 | select KEXEC_CORE | |
545 | select BUILD_BIN2C | |
546 | depends on CRYPTO | |
547 | depends on CRYPTO_SHA256 | |
548 | depends on CRYPTO_SHA256_S390 | |
549 | help | |
550 | Enable the kexec file based system call. In contrast to the normal | |
551 | kexec system call this system call takes file descriptors for the | |
552 | kernel and initramfs as arguments. | |
553 | ||
554 | config ARCH_HAS_KEXEC_PURGATORY | |
555 | def_bool y | |
556 | depends on KEXEC_FILE | |
557 | ||
e23a8020 PR |
558 | config KEXEC_VERIFY_SIG |
559 | bool "Verify kernel signature during kexec_file_load() syscall" | |
560 | depends on KEXEC_FILE && SYSTEM_DATA_VERIFICATION | |
561 | help | |
562 | This option makes kernel signature verification mandatory for | |
563 | the kexec_file_load() syscall. | |
564 | ||
565 | In addition to that option, you need to enable signature | |
566 | verification for the corresponding kernel image type being | |
567 | loaded in order for this to work. | |
568 | ||
4c637cd8 HF |
569 | config ARCH_RANDOM |
570 | def_bool y | |
571 | prompt "s390 architectural random number generation API" | |
572 | help | |
573 | Enable the s390 architectural random number generation API | |
574 | to provide random data for all consumers within the Linux | |
575 | kernel. | |
576 | ||
577 | When enabled the arch_random_* functions declared in linux/random.h | |
578 | are implemented. The implementation is based on the s390 CPACF | |
579 | instruction subfunction TRNG which provides a real true random | |
580 | number generator. | |
581 | ||
582 | If unsure, say Y. | |
583 | ||
d768bd89 MS |
584 | config KERNEL_NOBP |
585 | def_bool n | |
586 | prompt "Enable modified branch prediction for the kernel by default" | |
587 | help | |
588 | If this option is selected the kernel will switch to a modified | |
589 | branch prediction mode if the firmware interface is available. | |
590 | The modified branch prediction mode improves the behaviour in | |
591 | regard to speculative execution. | |
592 | ||
593 | With the option enabled the kernel parameter "nobp=0" or "nospec" | |
594 | can be used to run the kernel in the normal branch prediction mode. | |
595 | ||
596 | With the option disabled the modified branch prediction mode is | |
597 | enabled with the "nobp=1" kernel parameter. | |
598 | ||
599 | If unsure, say N. | |
600 | ||
f19fbd5e MS |
601 | config EXPOLINE |
602 | def_bool n | |
603 | prompt "Avoid speculative indirect branches in the kernel" | |
604 | help | |
605 | Compile the kernel with the expoline compiler options to guard | |
606 | against kernel-to-user data leaks by avoiding speculative indirect | |
607 | branches. | |
608 | Requires a compiler with -mindirect-branch=thunk support for full | |
609 | protection. The kernel may run slower. | |
610 | ||
611 | If unsure, say N. | |
612 | ||
613 | choice | |
614 | prompt "Expoline default" | |
615 | depends on EXPOLINE | |
616 | default EXPOLINE_FULL | |
617 | ||
618 | config EXPOLINE_OFF | |
619 | bool "spectre_v2=off" | |
620 | ||
6e179d64 | 621 | config EXPOLINE_AUTO |
f19fbd5e MS |
622 | bool "spectre_v2=auto" |
623 | ||
624 | config EXPOLINE_FULL | |
625 | bool "spectre_v2=on" | |
626 | ||
627 | endchoice | |
628 | ||
805bc0bc GS |
629 | config RELOCATABLE |
630 | bool "Build a relocatable kernel" | |
631 | select MODULE_REL_CRCS if MODVERSIONS | |
632 | default y | |
633 | help | |
634 | This builds a kernel image that retains relocation information | |
635 | so it can be loaded at an arbitrary address. | |
636 | The kernel is linked as a position-independent executable (PIE) | |
637 | and contains dynamic relocations which are processed early in the | |
638 | bootup process. | |
639 | The relocations make the kernel image about 15% larger (compressed | |
640 | 10%), but are discarded at runtime. | |
641 | ||
b2d24b97 GS |
642 | config RANDOMIZE_BASE |
643 | bool "Randomize the address of the kernel image (KASLR)" | |
644 | depends on RELOCATABLE | |
645 | default y | |
646 | help | |
647 | In support of Kernel Address Space Layout Randomization (KASLR), | |
648 | this randomizes the address at which the kernel image is loaded, | |
649 | as a security feature that deters exploit attempts relying on | |
650 | knowledge of the location of kernel internals. | |
651 | ||
843c48fd | 652 | endmenu |
1da177e4 | 653 | |
843c48fd | 654 | menu "Memory setup" |
1d057720 | 655 | |
843c48fd | 656 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 657 | def_bool y |
843c48fd JG |
658 | select SPARSEMEM_VMEMMAP_ENABLE |
659 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 660 | |
843c48fd JG |
661 | config ARCH_SPARSEMEM_DEFAULT |
662 | def_bool y | |
1da177e4 | 663 | |
843c48fd JG |
664 | config ARCH_SELECT_MEMORY_MODEL |
665 | def_bool y | |
1da177e4 | 666 | |
843c48fd JG |
667 | config ARCH_ENABLE_MEMORY_HOTPLUG |
668 | def_bool y if SPARSEMEM | |
0efa4703 | 669 | |
843c48fd JG |
670 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
671 | def_bool y | |
e37f50e1 | 672 | |
ec66ad66 MS |
673 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
674 | def_bool y | |
ec66ad66 | 675 | |
843c48fd JG |
676 | config FORCE_MAX_ZONEORDER |
677 | int | |
678 | default "9" | |
f861e405 | 679 | |
b8402b95 HC |
680 | config MAX_PHYSMEM_BITS |
681 | int "Maximum size of supported physical memory in bits (42-53)" | |
682 | range 42 53 | |
683 | default "46" | |
684 | help | |
685 | This option specifies the maximum supported size of physical memory | |
686 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
687 | Increasing the number of bits also increases the kernel image size. | |
688 | By default 46 bits (64TB) are supported. | |
689 | ||
1da177e4 | 690 | config PACK_STACK |
6f9a3c33 MS |
691 | def_bool y |
692 | prompt "Pack kernel stack" | |
1da177e4 LT |
693 | help |
694 | This option enables the compiler option -mkernel-backchain if it | |
695 | is available. If the option is available the compiler supports | |
696 | the new stack layout which dramatically reduces the minimum stack | |
697 | frame size. With an old compiler a non-leaf function needs a | |
698 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
699 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
700 | and 24 byte on 64 bit. | |
701 | ||
702 | Say Y if you are unsure. | |
703 | ||
1da177e4 | 704 | config CHECK_STACK |
6f9a3c33 | 705 | def_bool y |
ce3dc447 | 706 | depends on !VMAP_STACK |
6f9a3c33 | 707 | prompt "Detect kernel stack overflow" |
1da177e4 LT |
708 | help |
709 | This option enables the compiler option -mstack-guard and | |
710 | -mstack-size if they are available. If the compiler supports them | |
711 | it will emit additional code to each function prolog to trigger | |
712 | an illegal operation if the kernel stack is about to overflow. | |
713 | ||
714 | Say N if you are unsure. | |
715 | ||
716 | config STACK_GUARD | |
717 | int "Size of the guard area (128-1024)" | |
718 | range 128 1024 | |
719 | depends on CHECK_STACK | |
720 | default "256" | |
721 | help | |
722 | This allows you to specify the size of the guard area at the lower | |
723 | end of the kernel stack. If the kernel stack points into the guard | |
724 | area on function entry an illegal operation is triggered. The size | |
725 | needs to be a power of 2. Please keep in mind that the size of an | |
726 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
727 | The minimum size for the stack guard should be 256 for 31 bit and | |
728 | 512 for 64 bit. | |
729 | ||
2c190da4 | 730 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 731 | def_bool n |
2c190da4 | 732 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 733 | help |
2c190da4 JG |
734 | This option enables the compiler option -mwarn-dynamicstack. If the |
735 | compiler supports this options generates warnings for functions | |
736 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
737 | |
738 | Say N if you are unsure. | |
739 | ||
843c48fd | 740 | endmenu |
3f22ab27 | 741 | |
843c48fd | 742 | menu "I/O subsystem" |
1da177e4 | 743 | |
1da177e4 | 744 | config QDIO |
6f9a3c33 MS |
745 | def_tristate y |
746 | prompt "QDIO support" | |
1da177e4 | 747 | ---help--- |
8129ee16 | 748 | This driver provides the Queued Direct I/O base support for |
efca13bc | 749 | IBM System z. |
1da177e4 LT |
750 | |
751 | To compile this driver as a module, choose M here: the | |
752 | module will be called qdio. | |
753 | ||
754 | If unsure, say Y. | |
755 | ||
c8717a3d JG |
756 | if PCI |
757 | ||
758 | config PCI_NR_FUNCTIONS | |
759 | int "Maximum number of PCI functions (1-4096)" | |
760 | range 1 4096 | |
b18601b0 | 761 | default "128" |
c8717a3d JG |
762 | help |
763 | This allows you to specify the maximum number of PCI functions which | |
764 | this kernel will support. | |
765 | ||
c8717a3d JG |
766 | endif # PCI |
767 | ||
c8717a3d JG |
768 | config HAS_IOMEM |
769 | def_bool PCI | |
770 | ||
9d92a7e1 | 771 | config CHSC_SCH |
d9c11b1e | 772 | def_tristate m |
6f9a3c33 | 773 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
774 | help |
775 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
776 | is usually present on LPAR only. | |
777 | The driver creates a device /dev/chsc, which may be used to | |
778 | obtain I/O configuration information about the machine and | |
779 | to issue asynchronous chsc commands (DANGEROUS). | |
780 | You will usually only want to use this interface on a special | |
781 | LPAR designated for system management. | |
782 | ||
783 | To compile this driver as a module, choose M here: the | |
784 | module will be called chsc_sch. | |
785 | ||
786 | If unsure, say N. | |
787 | ||
1d1c8f78 SO |
788 | config SCM_BUS |
789 | def_bool y | |
1d1c8f78 SO |
790 | prompt "SCM bus driver" |
791 | help | |
792 | Bus driver for Storage Class Memory. | |
793 | ||
eadb86ab SO |
794 | config EADM_SCH |
795 | def_tristate m | |
796 | prompt "Support for EADM subchannels" | |
797 | depends on SCM_BUS | |
798 | help | |
799 | This driver allows usage of EADM subchannels. EADM subchannels act | |
800 | as a communication vehicle for SCM increments. | |
801 | ||
802 | To compile this driver as a module, choose M here: the | |
803 | module will be called eadm_sch. | |
804 | ||
63f1934d DJS |
805 | config VFIO_CCW |
806 | def_tristate n | |
807 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 808 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
809 | help |
810 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
811 | ||
812 | To compile this driver as a module, choose M here: the | |
813 | module will be called vfio_ccw. | |
814 | ||
1fde5734 TK |
815 | config VFIO_AP |
816 | def_tristate n | |
817 | prompt "VFIO support for AP devices" | |
818 | depends on S390_AP_IOMMU && VFIO_MDEV_DEVICE && KVM | |
819 | help | |
820 | This driver grants access to Adjunct Processor (AP) devices | |
821 | via the VFIO mediated device interface. | |
822 | ||
823 | To compile this driver as a module, choose M here: the module | |
824 | will be called vfio_ap. | |
825 | ||
843c48fd JG |
826 | endmenu |
827 | ||
828 | menu "Dump support" | |
829 | ||
830 | config CRASH_DUMP | |
831 | bool "kernel crash dumps" | |
5a79859a | 832 | depends on SMP |
843c48fd JG |
833 | select KEXEC |
834 | help | |
835 | Generate crash dump after being started by kexec. | |
836 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
837 | into a specially reserved region and then later executed after | |
838 | a crash by kdump/kexec. | |
843c48fd | 839 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
840 | This option also enables s390 zfcpdump. |
841 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
842 | |
843 | endmenu | |
844 | ||
843c48fd JG |
845 | config SECCOMP |
846 | def_bool y | |
847 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
848 | depends on PROC_FS | |
849 | help | |
850 | This kernel feature is useful for number crunching applications | |
851 | that may need to compute untrusted bytecode during their | |
852 | execution. By using pipes or other transports made available to | |
853 | the process as file descriptors supporting the read/write | |
854 | syscalls, it's possible to isolate those applications in | |
855 | their own address space using seccomp. Once seccomp is | |
856 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
857 | and the task is only allowed to execute a few safe syscalls | |
858 | defined by each seccomp mode. | |
859 | ||
860 | If unsure, say Y. | |
861 | ||
843c48fd JG |
862 | menu "Power Management" |
863 | ||
864 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 865 | def_bool y |
843c48fd JG |
866 | |
867 | source "kernel/power/Kconfig" | |
868 | ||
869 | endmenu | |
870 | ||
843c48fd JG |
871 | config CCW |
872 | def_bool y | |
873 | ||
b6ef86e9 UB |
874 | config HAVE_PNETID |
875 | tristate | |
876 | default (SMC || CCWGROUP) | |
877 | ||
843c48fd | 878 | menu "Virtualization" |
684de39b | 879 | |
5abb9351 VG |
880 | config PROTECTED_VIRTUALIZATION_GUEST |
881 | def_bool n | |
882 | prompt "Protected virtualization guest support" | |
883 | help | |
884 | Select this option, if you want to be able to run this | |
885 | kernel as a protected virtualization KVM guest. | |
886 | Protected virtualization capable machines have a mini hypervisor | |
887 | located at machine level (an ultravisor). With help of the | |
888 | Ultravisor, KVM will be able to run "protected" VMs, special | |
889 | VMs whose memory and management data are unavailable to KVM. | |
890 | ||
1da177e4 | 891 | config PFAULT |
6f9a3c33 MS |
892 | def_bool y |
893 | prompt "Pseudo page fault support" | |
1da177e4 LT |
894 | help |
895 | Select this option, if you want to use PFAULT pseudo page fault | |
896 | handling under VM. If running native or in LPAR, this option | |
897 | has no effect. If your VM does not support PFAULT, PAGEEX | |
898 | pseudo page fault handling will be used. | |
899 | Note that VM 4.2 supports PFAULT but has a bug in its | |
900 | implementation that causes some problems. | |
901 | Everybody who wants to run Linux under VM != VM4.2 should select | |
902 | this option. | |
903 | ||
1da177e4 | 904 | config CMM |
6f9a3c33 MS |
905 | def_tristate n |
906 | prompt "Cooperative memory management" | |
1da177e4 LT |
907 | help |
908 | Select this option, if you want to enable the kernel interface | |
909 | to reduce the memory size of the system. This is accomplished | |
910 | by allocating pages of memory and put them "on hold". This only | |
911 | makes sense for a system running under VM where the unused pages | |
912 | will be reused by VM for other guest systems. The interface | |
913 | allows an external monitor to balance memory of many systems. | |
914 | Everybody who wants to run Linux under VM should select this | |
915 | option. | |
916 | ||
1da177e4 | 917 | config CMM_IUCV |
6f9a3c33 MS |
918 | def_bool y |
919 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
920 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
921 | help | |
922 | Select this option to enable the special message interface to | |
923 | the cooperative memory management. | |
924 | ||
1da177e4 | 925 | config APPLDATA_BASE |
6f9a3c33 MS |
926 | def_bool n |
927 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 928 | depends on PROC_FS |
1da177e4 LT |
929 | help |
930 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
931 | monitor records. The monitor records are updated at certain time | |
932 | intervals, once the timer is started. | |
933 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
934 | i.e. enables or disables monitoring on the Linux side. | |
935 | A custom interval value (in seconds) can be written to | |
936 | /proc/appldata/interval. | |
937 | ||
938 | Defaults are 60 seconds interval and timer off. | |
939 | The /proc entries can also be read from, showing the current settings. | |
940 | ||
941 | config APPLDATA_MEM | |
6f9a3c33 MS |
942 | def_tristate m |
943 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 944 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
945 | help |
946 | This provides memory management related data to the Linux - VM Monitor | |
947 | Stream, like paging/swapping rate, memory utilisation, etc. | |
948 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
949 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
950 | on the z/VM side. | |
951 | ||
952 | Default is disabled. | |
953 | The /proc entry can also be read from, showing the current settings. | |
954 | ||
955 | This can also be compiled as a module, which will be called | |
956 | appldata_mem.o. | |
957 | ||
958 | config APPLDATA_OS | |
6f9a3c33 MS |
959 | def_tristate m |
960 | prompt "Monitor OS statistics" | |
1da177e4 LT |
961 | depends on APPLDATA_BASE |
962 | help | |
963 | This provides OS related data to the Linux - VM Monitor Stream, like | |
964 | CPU utilisation, etc. | |
965 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
966 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
967 | on the z/VM side. | |
968 | ||
969 | Default is disabled. | |
970 | This can also be compiled as a module, which will be called | |
971 | appldata_os.o. | |
972 | ||
973 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
974 | def_tristate m |
975 | prompt "Monitor overall network statistics" | |
70193af9 | 976 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
977 | help |
978 | This provides network related data to the Linux - VM Monitor Stream, | |
979 | currently there is only a total sum of network I/O statistics, no | |
980 | per-interface data. | |
981 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
982 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
983 | on the z/VM side. | |
984 | ||
985 | Default is disabled. | |
986 | This can also be compiled as a module, which will be called | |
987 | appldata_net_sum.o. | |
988 | ||
24bbb1fa | 989 | config S390_HYPFS_FS |
6f9a3c33 MS |
990 | def_bool y |
991 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 992 | select SYS_HYPERVISOR |
24bbb1fa MH |
993 | help |
994 | This is a virtual file system intended to provide accounting | |
995 | information in an s390 hypervisor environment. | |
996 | ||
843c48fd | 997 | source "arch/s390/kvm/Kconfig" |
411ed322 | 998 | |
fa587743 | 999 | config S390_GUEST |
6f9a3c33 | 1000 | def_bool y |
510cf5a6 | 1001 | prompt "s390 support for virtio devices" |
79b6f7fb | 1002 | select TTY |
80629b0b | 1003 | select VIRTUALIZATION |
fa587743 | 1004 | select VIRTIO |
faeba830 | 1005 | select VIRTIO_CONSOLE |
fa587743 | 1006 | help |
bdd1fc27 CH |
1007 | Enabling this option adds support for virtio based paravirtual device |
1008 | drivers on s390. | |
1da177e4 | 1009 | |
20766c08 | 1010 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 1011 | the KVM hypervisor. |
155af2f9 HJP |
1012 | |
1013 | endmenu |