1 # SPDX-License-Identifier: GPL-2.0
2 config PPC32
3 bool
4 default y if !PPC64
5
6 config PPC64
7 bool "64-bit kernel"
8 select ZLIB_DEFLATE
9 help
10 This option selects whether a 32-bit or a 64-bit kernel
11 will be built.
12
13 menu "Processor support"
14 choice
15 prompt "Processor Type"
16 depends on PPC32
17 help
18 There are five families of 32 bit PowerPC chips supported.
19 The most common ones are the desktop and server CPUs (603,
20 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
21 embedded 512x/52xx/82xx/83xx/86xx counterparts.
22 The other embedded parts, namely 4xx, 8xx and e500
23 (85xx) each form a family of their own that is not compatible
24 with the others.
25
26 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
27
28 config PPC_BOOK3S_32
29 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
30 imply PPC_FPU
31 select PPC_HAVE_PMU_SUPPORT
32 select HAVE_ARCH_VMAP_STACK
33
34 config PPC_85xx
35 bool "Freescale 85xx"
36 select PPC_E500
37
38 config PPC_8xx
39 bool "Freescale 8xx"
40 select ARCH_SUPPORTS_HUGETLBFS
41 select FSL_SOC
42 select PPC_KUEP
43 select HAVE_ARCH_VMAP_STACK
44 select HUGETLBFS
45
46 config 44x
47 bool "AMCC 44x, 46x or 47x"
48 select PPC_DCR_NATIVE
49 select PPC_UDBG_16550
50 select HAVE_PCI
51 select PHYS_64BIT
52 select PPC_KUEP
53
54 endchoice
55
56 config PPC_BOOK3S_603
57 bool "Support for 603 SW loaded TLB"
58 depends on PPC_BOOK3S_32
59 default y
60 help
61 Provide support for processors based on the 603 cores. Those
62 processors don't have a HASH MMU and provide SW TLB loading.
63
64 config PPC_BOOK3S_604
65 bool "Support for 604+ HASH MMU" if PPC_BOOK3S_603
66 depends on PPC_BOOK3S_32
67 default y
68 help
69 Provide support for processors not based on the 603 cores.
70 Those processors have a HASH MMU.
71
72 choice
73 prompt "Processor Type"
74 depends on PPC64
75 help
76 There are two families of 64 bit PowerPC chips supported.
77 The most common ones are the desktop and server CPUs
78 (POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...)
79
80 The other are the "embedded" processors compliant with the
81 "Book 3E" variant of the architecture
82
83 config PPC_BOOK3S_64
84 bool "Server processors"
85 select PPC_FPU
86 select PPC_HAVE_PMU_SUPPORT
87 select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
88 select ARCH_ENABLE_SPLIT_PMD_PTLOCK
89 select ARCH_SUPPORTS_HUGETLBFS
90 select ARCH_SUPPORTS_NUMA_BALANCING
91 select HAVE_MOVE_PMD
92 select HAVE_MOVE_PUD
93 select IRQ_WORK
94 select PPC_64S_HASH_MMU if !PPC_RADIX_MMU
95 select KASAN_VMALLOC if KASAN
96
97 config PPC_BOOK3E_64
98 bool "Embedded processors"
99 select PPC_E500
100 select PPC_E500MC
101 select PPC_FPU # Make it a choice ?
102 select PPC_SMP_MUXED_IPI
103 select PPC_DOORBELL
104 select ZONE_DMA
105
106 endchoice
107
108 config PPC_THP
109 def_bool y
110 depends on PPC_BOOK3S_64
111 depends on PPC_RADIX_MMU || (PPC_64S_HASH_MMU && PAGE_SIZE_64KB)
112 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
113 select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
114 select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
115
116 choice
117 prompt "CPU selection"
118 help
119 This will create a kernel which is optimised for a particular CPU.
120 The resulting kernel may not run on other CPUs, so use this with care.
121
122 If unsure, select Generic.
123
124 config POWERPC64_CPU
125 bool "Generic (POWER5 and PowerPC 970 and above)"
126 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
127 select PPC_64S_HASH_MMU
128
129 config POWERPC64_CPU
130 bool "Generic (POWER8 and above)"
131 depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
132 select ARCH_HAS_FAST_MULTIPLIER
133 select PPC_64S_HASH_MMU
134 select PPC_HAS_LBARX_LHARX
135
136 config POWERPC_CPU
137 bool "Generic 32 bits powerpc"
138 depends on PPC_BOOK3S_32
139
140 config CELL_CPU
141 bool "Cell Broadband Engine"
142 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
143 depends on !CC_IS_CLANG
144 select PPC_64S_HASH_MMU
145
146 config PPC_970_CPU
147 bool "PowerPC 970 (including PowerPC G5)"
148 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
149 select PPC_64S_HASH_MMU
150
151 config POWER6_CPU
152 bool "POWER6"
153 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
154 select PPC_64S_HASH_MMU
155
156 config POWER7_CPU
157 bool "POWER7"
158 depends on PPC_BOOK3S_64
159 select ARCH_HAS_FAST_MULTIPLIER
160 select PPC_64S_HASH_MMU
161 select PPC_HAS_LBARX_LHARX
162
163 config POWER8_CPU
164 bool "POWER8"
165 depends on PPC_BOOK3S_64
166 select ARCH_HAS_FAST_MULTIPLIER
167 select PPC_64S_HASH_MMU
168 select PPC_HAS_LBARX_LHARX
169
170 config POWER9_CPU
171 bool "POWER9"
172 depends on PPC_BOOK3S_64
173 select ARCH_HAS_FAST_MULTIPLIER
174 select PPC_HAS_LBARX_LHARX
175
176 config POWER10_CPU
177 bool "POWER10"
178 depends on PPC_BOOK3S_64
179 select ARCH_HAS_FAST_MULTIPLIER
180 select PPC_HAVE_PREFIXED_SUPPORT
181 select PPC_HAVE_PCREL_SUPPORT
182
183 config E5500_CPU
184 bool "Freescale e5500"
185 depends on PPC64 && PPC_E500
186
187 config E6500_CPU
188 bool "Freescale e6500"
189 depends on PPC64 && PPC_E500
190 depends on !CC_IS_CLANG
191 select PPC_HAS_LBARX_LHARX
192
193 config 440_CPU
194 bool "440 (44x family)"
195 depends on 44x
196
197 config 464_CPU
198 bool "464 (44x family)"
199 depends on 44x
200 depends on !CC_IS_CLANG
201
202 config 476_CPU
203 bool "476 (47x family)"
204 depends on PPC_47x
205 depends on !CC_IS_CLANG
206
207 config 860_CPU
208 bool "8xx family"
209 depends on PPC_8xx
210 depends on !CC_IS_CLANG
211
212 config E300C2_CPU
213 bool "e300c2 (832x)"
214 depends on PPC_BOOK3S_32
215 depends on !CC_IS_CLANG
216
217 config E300C3_CPU
218 bool "e300c3 (831x)"
219 depends on PPC_BOOK3S_32
220 depends on !CC_IS_CLANG
221
222 config G4_CPU
223 bool "G4 (74xx)"
224 depends on PPC_BOOK3S_32
225 select ALTIVEC
226
227 config E500_CPU
228 bool "e500 (8540)"
229 depends on PPC_85xx && !PPC_E500MC
230
231 config E500MC_CPU
232 bool "e500mc"
233 depends on PPC_85xx && PPC_E500MC
234
235 config TOOLCHAIN_DEFAULT_CPU
236 bool "Rely on the toolchain's implicit default CPU"
237
238 endchoice
239
240 config TARGET_CPU_BOOL
241 bool
242 default !TOOLCHAIN_DEFAULT_CPU
243
244 config TARGET_CPU
245 string
246 depends on TARGET_CPU_BOOL
247 default "cell" if CELL_CPU
248 default "970" if PPC_970_CPU
249 default "power6" if POWER6_CPU
250 default "power7" if POWER7_CPU
251 default "power8" if POWER8_CPU
252 default "power9" if POWER9_CPU
253 default "power10" if POWER10_CPU
254 default "e5500" if E5500_CPU
255 default "e6500" if E6500_CPU
256 default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN
257 default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN
258 default "440" if 440_CPU
259 default "464" if 464_CPU
260 default "476" if 476_CPU
261 default "860" if 860_CPU
262 default "e300c2" if E300C2_CPU
263 default "e300c3" if E300C3_CPU
264 default "G4" if G4_CPU
265 default "8540" if E500_CPU
266 default "e500mc" if E500MC_CPU
267 default "powerpc" if POWERPC_CPU
268
269 config TUNE_CPU
270 string
271 depends on POWERPC64_CPU
272 default "-mtune=power10" if $(cc-option,-mtune=power10)
273 default "-mtune=power9" if $(cc-option,-mtune=power9)
274 default "-mtune=power8" if $(cc-option,-mtune=power8)
275
276 config PPC_BOOK3S
277 def_bool y
278 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
279
280 config PPC_E500
281 select FSL_EMB_PERFMON
282 bool
283 select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
284 select PPC_SMP_MUXED_IPI
285 select PPC_DOORBELL
286 select PPC_KUEP
287
288 config PPC_E500MC
289 bool "e500mc Support"
290 select PPC_FPU
291 select COMMON_CLK
292 depends on PPC_E500
293 help
294 This must be enabled for running on e500mc (and derivatives
295 such as e5500/e6500), and must be disabled for running on
296 e500v1 or e500v2.
297
298 config PPC_FPU_REGS
299 bool
300
301 config PPC_FPU
302 bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x
303 default y if PPC64
304 select PPC_FPU_REGS
305 help
306 This must be enabled to support the Floating Point Unit
307 Most 6xx have an FPU but e300c2 core (mpc832x) don't have
308 an FPU, so when building an embedded kernel for that target
309 you can disable FPU support.
310
311 If unsure say Y.
312
313 config FSL_EMB_PERFMON
314 bool "Freescale Embedded Perfmon"
315 depends on PPC_E500 || PPC_83xx
316 help
317 This is the Performance Monitor support found on the e500 core
318 and some e300 cores (c3 and c4). Select this only if your
319 core supports the Embedded Performance Monitor APU
320
321 config FSL_EMB_PERF_EVENT
322 bool
323 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
324 default y
325
326 config FSL_EMB_PERF_EVENT_E500
327 bool
328 depends on FSL_EMB_PERF_EVENT && PPC_E500
329 default y
330
331 config 4xx
332 bool
333 depends on 44x
334 default y
335
336 config BOOKE
337 bool
338 depends on PPC_E500 || 44x
339 default y
340
341 config PTE_64BIT
342 bool
343 depends on 44x || PPC_E500 || PPC_86xx
344 default y if PHYS_64BIT
345
346 config PHYS_64BIT
347 bool 'Large physical address support' if PPC_E500 || PPC_86xx
348 depends on (44x || PPC_E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
349 select PHYS_ADDR_T_64BIT
350 help
351 This option enables kernel support for larger than 32-bit physical
352 addresses. This feature may not be available on all cores.
353
354 If you have more than 3.5GB of RAM or so, you also need to enable
355 SWIOTLB under Kernel Options for this to work. The actual number
356 is platform-dependent.
357
358 If in doubt, say N here.
359
360 config ALTIVEC
361 bool "AltiVec Support"
362 depends on PPC_BOOK3S || (PPC_E500MC && PPC64 && !E5500_CPU)
363 select PPC_FPU
364 help
365 This option enables kernel support for the Altivec extensions to the
366 PowerPC processor. The kernel currently supports saving and restoring
367 altivec registers, and turning on the 'altivec enable' bit so user
368 processes can execute altivec instructions.
369
370 This option is only usefully if you have a processor that supports
371 altivec (G4, otherwise known as 74xx series), but does not have
372 any affect on a non-altivec cpu (it does, however add code to the
373 kernel).
374
375 If in doubt, say Y here.
376
377 config VSX
378 bool "VSX Support"
379 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
380 help
381
382 This option enables kernel support for the Vector Scaler extensions
383 to the PowerPC processor. The kernel currently supports saving and
384 restoring VSX registers, and turning on the 'VSX enable' bit so user
385 processes can execute VSX instructions.
386
387 This option is only useful if you have a processor that supports
388 VSX (P7 and above), but does not have any affect on a non-VSX
389 CPUs (it does, however add code to the kernel).
390
391 If in doubt, say Y here.
392
393 config SPE_POSSIBLE
394 def_bool y
395 depends on PPC_E500 && !PPC_E500MC
396
397 config SPE
398 bool "SPE Support"
399 depends on SPE_POSSIBLE
400 default y
401 help
402 This option enables kernel support for the Signal Processing
403 Extensions (SPE) to the PowerPC processor. The kernel currently
404 supports saving and restoring SPE registers, and turning on the
405 'spe enable' bit so user processes can execute SPE instructions.
406
407 This option is only useful if you have a processor that supports
408 SPE (e500, otherwise known as 85xx series), but does not have any
409 effect on a non-spe cpu (it does, however add code to the kernel).
410
411 If in doubt, say Y here.
412
413 config PPC_64S_HASH_MMU
414 bool "Hash MMU Support"
415 depends on PPC_BOOK3S_64
416 default y
417 help
418 Enable support for the Power ISA Hash style MMU. This is implemented
419 by all IBM Power and other 64-bit Book3S CPUs before ISA v3.0. The
420 OpenPOWER ISA does not mandate the hash MMU and some CPUs do not
421 implement it (e.g., Microwatt).
422
423 Note that POWER9 PowerVM platforms only support the hash
424 MMU. From POWER10 radix is also supported by PowerVM.
425
426 If you're unsure, say Y.
427
428 config PPC_RADIX_MMU
429 bool "Radix MMU Support"
430 depends on PPC_BOOK3S_64
431 select ARCH_HAS_GIGANTIC_PAGE
432 default y
433 help
434 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
435 is only implemented by IBM Power9 CPUs, if you don't have one of them
436 you can probably disable this.
437
438 config PPC_RADIX_MMU_DEFAULT
439 bool "Default to using the Radix MMU when possible" if PPC_64S_HASH_MMU
440 depends on PPC_BOOK3S_64
441 depends on PPC_RADIX_MMU
442 default y
443 help
444 When the hardware supports the Radix MMU, default to using it unless
445 "disable_radix[=yes]" is specified on the kernel command line.
446
447 If this option is disabled, the Hash MMU will be used by default,
448 unless "disable_radix=no" is specified on the kernel command line.
449
450 If you're unsure, say Y.
451
452 config PPC_KERNEL_PREFIXED
453 depends on PPC_HAVE_PREFIXED_SUPPORT
454 depends on CC_HAS_PREFIXED
455 default n
456 bool "Build Kernel with Prefixed Instructions"
457 help
458 POWER10 and later CPUs support prefixed instructions, 8 byte
459 instructions that include large immediate, pc relative addressing,
460 and various floating point, vector, MMA.
461
462 This option builds the kernel with prefixed instructions, and
463 allows a pc relative addressing option to be selected.
464
465 Kernel support for prefixed instructions in applications and guests
466 is not affected by this option.
467
468 config PPC_KERNEL_PCREL
469 depends on PPC_HAVE_PCREL_SUPPORT
470 depends on PPC_HAVE_PREFIXED_SUPPORT
471 depends on CC_HAS_PCREL
472 default n
473 select PPC_KERNEL_PREFIXED
474 bool "Build Kernel with PC-Relative addressing model"
475 help
476 POWER10 and later CPUs support pc relative addressing. Recent
477 compilers have support for an ELF ABI extension for a pc relative
478 ABI.
479
480 This option builds the kernel with the pc relative ABI model.
481
482 config PPC_KUEP
483 bool "Kernel Userspace Execution Prevention"
484 default y
485 help
486 Enable support for Kernel Userspace Execution Prevention (KUEP)
487
488 If you're unsure, say Y.
489
490 config PPC_KUAP
491 bool "Kernel Userspace Access Protection"
492 default y
493 help
494 Enable support for Kernel Userspace Access Protection (KUAP)
495
496 If you're unsure, say Y.
497
498 config PPC_KUAP_DEBUG
499 bool "Extra debugging for Kernel Userspace Access Protection"
500 depends on PPC_KUAP
501 help
502 Add extra debugging for Kernel Userspace Access Protection (KUAP)
503 If you're unsure, say N.
504
505 config PPC_PKEY
506 def_bool y
507 depends on PPC_BOOK3S_64
508 depends on PPC_MEM_KEYS || PPC_KUAP || PPC_KUEP
509
510
511 config PPC_MMU_NOHASH
512 def_bool y
513 depends on !PPC_BOOK3S
514
515 config PPC_HAVE_PMU_SUPPORT
516 bool
517
518 config PPC_HAVE_PREFIXED_SUPPORT
519 bool
520
521 config PPC_HAVE_PCREL_SUPPORT
522 bool
523
524 config PMU_SYSFS
525 bool "Create PMU SPRs sysfs file"
526 default n
527 help
528 This option enables sysfs file creation for PMU SPRs like MMCR* and PMC*.
529
530 config PPC_PERF_CTRS
531 def_bool y
532 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
533 help
534 This enables the powerpc-specific perf_event back-end.
535
536 config FORCE_SMP
537 # Allow platforms to force SMP=y by selecting this
538 bool
539 select SMP
540
541 config SMP
542 depends on PPC_BOOK3S || PPC_E500 || PPC_47x
543 select GENERIC_IRQ_MIGRATION
544 bool "Symmetric multi-processing support" if !FORCE_SMP
545 help
546 This enables support for systems with more than one CPU. If you have
547 a system with only one CPU, say N. If you have a system with more
548 than one CPU, say Y. Note that the kernel does not currently
549 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
550 since they have inadequate hardware support for multiprocessor
551 operation.
552
553 If you say N here, the kernel will run on single and multiprocessor
554 machines, but will use only one CPU of a multiprocessor machine. If
555 you say Y here, the kernel will run on single-processor machines.
556 On a single-processor machine, the kernel will run faster if you say
557 N here.
558
559 If you don't know what to do here, say N.
560
561 config NR_CPUS
562 int "Maximum number of CPUs (2-8192)" if SMP
563 range 2 8192 if SMP
564 default "1" if !SMP
565 default "32" if PPC64
566 default "4"
567
568 config NOT_COHERENT_CACHE
569 bool
570 depends on 44x || PPC_8xx || PPC_MPC512x || \
571 GAMECUBE_COMMON || AMIGAONE
572 select ARCH_HAS_DMA_PREP_COHERENT
573 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
574 select ARCH_HAS_SYNC_DMA_FOR_CPU
575 select DMA_DIRECT_REMAP
576 default n if PPC_47x
577 default y
578
579 config CHECK_CACHE_COHERENCY
580 bool
581
582 config PPC_DOORBELL
583 bool
584
585 endmenu
586
587 config VDSO32
588 def_bool y
589 depends on PPC32 || COMPAT
590 help
591 This symbol controls whether we build the 32-bit VDSO. We obviously
592 want to do that if we're building a 32-bit kernel. If we're building
593 a 64-bit kernel then we only want a 32-bit VDSO if we're also enabling
594 COMPAT.
595
596 choice
597 prompt "Endianness selection"
598 default CPU_BIG_ENDIAN
599 help
600 This option selects whether a big endian or little endian kernel will
601 be built.
602
603 config CPU_BIG_ENDIAN
604 bool "Build big endian kernel"
605 help
606 Build a big endian kernel.
607
608 If unsure, select this option.
609
610 config CPU_LITTLE_ENDIAN
611 bool "Build little endian kernel"
612 depends on PPC_BOOK3S_64
613 select PPC64_BOOT_WRAPPER
614 help
615 Build a little endian kernel.
616
617 Note that if cross compiling a little endian kernel,
618 CROSS_COMPILE must point to a toolchain capable of targeting
619 little endian powerpc.
620
621 endchoice
622
623 config PPC64_ELF_ABI_V1
624 def_bool PPC64 && (CPU_BIG_ENDIAN && !PPC64_BIG_ENDIAN_ELF_ABI_V2)
625
626 config PPC64_ELF_ABI_V2
627 def_bool PPC64 && !PPC64_ELF_ABI_V1
628
629 config PPC64_BOOT_WRAPPER
630 def_bool n
631 depends on CPU_LITTLE_ENDIAN
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.