1 # SPDX-License-Identifier: GPL-2.0
10 This option selects whether a 32-bit or a 64-bit kernel
13 menu "Processor support"
15 prompt "Processor Type"
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
26 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
29 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
31 select PPC_HAVE_PMU_SUPPORT
32 select HAVE_ARCH_VMAP_STACK
40 select ARCH_SUPPORTS_HUGETLBFS
43 select HAVE_ARCH_VMAP_STACK
52 select PPC_KUEP if PPC_KUAP
55 bool "AMCC 44x, 46x or 47x"
66 bool "Support for 603 SW loaded TLB"
67 depends on PPC_BOOK3S_32
70 Provide support for processors based on the 603 cores. Those
71 processors don't have a HASH MMU and provide SW TLB loading.
74 bool "Support for 604+ HASH MMU" if PPC_BOOK3S_603
75 depends on PPC_BOOK3S_32
78 Provide support for processors not based on the 603 cores.
79 Those processors have a HASH MMU.
82 prompt "Processor Type"
85 There are two families of 64 bit PowerPC chips supported.
86 The most common ones are the desktop and server CPUs
87 (POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...)
89 The other are the "embedded" processors compliant with the
90 "Book 3E" variant of the architecture
93 bool "Server processors"
95 select PPC_HAVE_PMU_SUPPORT
96 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
97 select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
98 select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
99 select ARCH_ENABLE_SPLIT_PMD_PTLOCK
100 select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
101 select ARCH_SUPPORTS_HUGETLBFS
102 select ARCH_SUPPORTS_NUMA_BALANCING
106 select PPC_64S_HASH_MMU if !PPC_RADIX_MMU
107 select KASAN_VMALLOC if KASAN
110 bool "Embedded processors"
113 select PPC_FPU # Make it a choice ?
114 select PPC_SMP_MUXED_IPI
121 prompt "CPU selection"
123 This will create a kernel which is optimised for a particular CPU.
124 The resulting kernel may not run on other CPUs, so use this with care.
126 If unsure, select Generic.
129 bool "Generic (POWER5 and PowerPC 970 and above)"
130 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
131 select PPC_64S_HASH_MMU
134 bool "Generic (POWER8 and above)"
135 depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
136 select ARCH_HAS_FAST_MULTIPLIER
137 select PPC_64S_HASH_MMU
138 select PPC_HAS_LBARX_LHARX
141 bool "Generic 32 bits powerpc"
142 depends on PPC_BOOK3S_32
145 bool "Cell Broadband Engine"
146 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
147 depends on !CC_IS_CLANG
148 select PPC_64S_HASH_MMU
151 bool "PowerPC 970 (including PowerPC G5)"
152 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
153 select PPC_64S_HASH_MMU
157 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
158 select PPC_64S_HASH_MMU
162 depends on PPC_BOOK3S_64
163 select ARCH_HAS_FAST_MULTIPLIER
164 select PPC_64S_HASH_MMU
165 select PPC_HAS_LBARX_LHARX
169 depends on PPC_BOOK3S_64
170 select ARCH_HAS_FAST_MULTIPLIER
171 select PPC_64S_HASH_MMU
172 select PPC_HAS_LBARX_LHARX
176 depends on PPC_BOOK3S_64
177 select ARCH_HAS_FAST_MULTIPLIER
178 select PPC_HAS_LBARX_LHARX
182 depends on PPC_BOOK3S_64
183 select ARCH_HAS_FAST_MULTIPLIER
184 select PPC_HAVE_PREFIXED_SUPPORT
185 select PPC_HAVE_PCREL_SUPPORT
188 bool "Freescale e5500"
189 depends on PPC64 && PPC_E500
192 bool "Freescale e6500"
193 depends on PPC64 && PPC_E500
194 depends on !CC_IS_CLANG
195 select PPC_HAS_LBARX_LHARX
200 depends on !CC_IS_CLANG
203 bool "440 (44x family)"
207 bool "464 (44x family)"
209 depends on !CC_IS_CLANG
212 bool "476 (47x family)"
214 depends on !CC_IS_CLANG
219 depends on !CC_IS_CLANG
223 depends on PPC_BOOK3S_32
224 depends on !CC_IS_CLANG
228 depends on PPC_BOOK3S_32
229 depends on !CC_IS_CLANG
233 depends on PPC_BOOK3S_32
238 depends on PPC_85xx && !PPC_E500MC
242 depends on PPC_85xx && PPC_E500MC
244 config TOOLCHAIN_DEFAULT_CPU
245 bool "Rely on the toolchain's implicit default CPU"
249 config TARGET_CPU_BOOL
251 default !TOOLCHAIN_DEFAULT_CPU
255 depends on TARGET_CPU_BOOL
256 default "cell" if CELL_CPU
257 default "970" if PPC_970_CPU
258 default "power6" if POWER6_CPU
259 default "power7" if POWER7_CPU
260 default "power8" if POWER8_CPU
261 default "power9" if POWER9_CPU
262 default "power10" if POWER10_CPU
263 default "e5500" if E5500_CPU
264 default "e6500" if E6500_CPU
265 default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN
266 default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN
267 default "405" if 405_CPU
268 default "440" if 440_CPU
269 default "464" if 464_CPU
270 default "476" if 476_CPU
271 default "860" if 860_CPU
272 default "e300c2" if E300C2_CPU
273 default "e300c3" if E300C3_CPU
274 default "G4" if G4_CPU
275 default "8540" if E500_CPU
276 default "e500mc" if E500MC_CPU
277 default "powerpc" if POWERPC_CPU
281 depends on POWERPC64_CPU
282 default "-mtune=power10" if $(cc-option,-mtune=power10)
283 default "-mtune=power9" if $(cc-option,-mtune=power9)
284 default "-mtune=power8" if $(cc-option,-mtune=power8)
288 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
291 select FSL_EMB_PERFMON
293 select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
294 select PPC_SMP_MUXED_IPI
299 bool "e500mc Support"
304 This must be enabled for running on e500mc (and derivatives
305 such as e5500/e6500), and must be disabled for running on
312 bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x
316 This must be enabled to support the Floating Point Unit
317 Most 6xx have an FPU but e300c2 core (mpc832x) don't have
318 an FPU, so when building an embedded kernel for that target
319 you can disable FPU support.
323 config FSL_EMB_PERFMON
324 bool "Freescale Embedded Perfmon"
325 depends on PPC_E500 || PPC_83xx
327 This is the Performance Monitor support found on the e500 core
328 and some e300 cores (c3 and c4). Select this only if your
329 core supports the Embedded Performance Monitor APU
331 config FSL_EMB_PERF_EVENT
333 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
336 config FSL_EMB_PERF_EVENT_E500
338 depends on FSL_EMB_PERF_EVENT && PPC_E500
343 depends on 40x || 44x
348 depends on PPC_E500 || 44x
353 depends on BOOKE || 40x
358 depends on 44x || PPC_E500 || PPC_86xx
359 default y if PHYS_64BIT
362 bool 'Large physical address support' if PPC_E500 || PPC_86xx
363 depends on (44x || PPC_E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
364 select PHYS_ADDR_T_64BIT
366 This option enables kernel support for larger than 32-bit physical
367 addresses. This feature may not be available on all cores.
369 If you have more than 3.5GB of RAM or so, you also need to enable
370 SWIOTLB under Kernel Options for this to work. The actual number
371 is platform-dependent.
373 If in doubt, say N here.
376 bool "AltiVec Support"
377 depends on PPC_BOOK3S || (PPC_E500MC && PPC64 && !E5500_CPU)
380 This option enables kernel support for the Altivec extensions to the
381 PowerPC processor. The kernel currently supports saving and restoring
382 altivec registers, and turning on the 'altivec enable' bit so user
383 processes can execute altivec instructions.
385 This option is only usefully if you have a processor that supports
386 altivec (G4, otherwise known as 74xx series), but does not have
387 any affect on a non-altivec cpu (it does, however add code to the
390 If in doubt, say Y here.
394 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
397 This option enables kernel support for the Vector Scaler extensions
398 to the PowerPC processor. The kernel currently supports saving and
399 restoring VSX registers, and turning on the 'VSX enable' bit so user
400 processes can execute VSX instructions.
402 This option is only useful if you have a processor that supports
403 VSX (P7 and above), but does not have any affect on a non-VSX
404 CPUs (it does, however add code to the kernel).
406 If in doubt, say Y here.
410 depends on PPC_E500 && !PPC_E500MC
414 depends on SPE_POSSIBLE
417 This option enables kernel support for the Signal Processing
418 Extensions (SPE) to the PowerPC processor. The kernel currently
419 supports saving and restoring SPE registers, and turning on the
420 'spe enable' bit so user processes can execute SPE instructions.
422 This option is only useful if you have a processor that supports
423 SPE (e500, otherwise known as 85xx series), but does not have any
424 effect on a non-spe cpu (it does, however add code to the kernel).
426 If in doubt, say Y here.
428 config PPC_64S_HASH_MMU
429 bool "Hash MMU Support"
430 depends on PPC_BOOK3S_64
433 Enable support for the Power ISA Hash style MMU. This is implemented
434 by all IBM Power and other 64-bit Book3S CPUs before ISA v3.0. The
435 OpenPOWER ISA does not mandate the hash MMU and some CPUs do not
436 implement it (e.g., Microwatt).
438 Note that POWER9 PowerVM platforms only support the hash
439 MMU. From POWER10 radix is also supported by PowerVM.
441 If you're unsure, say Y.
444 bool "Radix MMU Support"
445 depends on PPC_BOOK3S_64
446 select ARCH_HAS_GIGANTIC_PAGE
449 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
450 is only implemented by IBM Power9 CPUs, if you don't have one of them
451 you can probably disable this.
453 config PPC_RADIX_MMU_DEFAULT
454 bool "Default to using the Radix MMU when possible" if PPC_64S_HASH_MMU
455 depends on PPC_BOOK3S_64
456 depends on PPC_RADIX_MMU
459 When the hardware supports the Radix MMU, default to using it unless
460 "disable_radix[=yes]" is specified on the kernel command line.
462 If this option is disabled, the Hash MMU will be used by default,
463 unless "disable_radix=no" is specified on the kernel command line.
465 If you're unsure, say Y.
467 config PPC_KERNEL_PREFIXED
468 depends on PPC_HAVE_PREFIXED_SUPPORT
469 depends on CC_HAS_PREFIXED
471 bool "Build Kernel with Prefixed Instructions"
473 POWER10 and later CPUs support prefixed instructions, 8 byte
474 instructions that include large immediate, pc relative addressing,
475 and various floating point, vector, MMA.
477 This option builds the kernel with prefixed instructions, and
478 allows a pc relative addressing option to be selected.
480 Kernel support for prefixed instructions in applications and guests
481 is not affected by this option.
483 config PPC_KERNEL_PCREL
484 depends on PPC_HAVE_PCREL_SUPPORT
485 depends on PPC_HAVE_PREFIXED_SUPPORT
486 depends on CC_HAS_PCREL
488 select PPC_KERNEL_PREFIXED
489 bool "Build Kernel with PC-Relative addressing model"
491 POWER10 and later CPUs support pc relative addressing. Recent
492 compilers have support for an ELF ABI extension for a pc relative
495 This option builds the kernel with the pc relative ABI model.
498 bool "Kernel Userspace Execution Prevention" if !40x
501 Enable support for Kernel Userspace Execution Prevention (KUEP)
503 If you're unsure, say Y.
506 bool "Kernel Userspace Access Protection"
509 Enable support for Kernel Userspace Access Protection (KUAP)
511 If you're unsure, say Y.
513 config PPC_KUAP_DEBUG
514 bool "Extra debugging for Kernel Userspace Access Protection"
517 Add extra debugging for Kernel Userspace Access Protection (KUAP)
518 If you're unsure, say N.
522 depends on PPC_BOOK3S_64
523 depends on PPC_MEM_KEYS || PPC_KUAP || PPC_KUEP
526 config PPC_MMU_NOHASH
528 depends on !PPC_BOOK3S
530 config PPC_HAVE_PMU_SUPPORT
533 config PPC_HAVE_PREFIXED_SUPPORT
536 config PPC_HAVE_PCREL_SUPPORT
540 bool "Create PMU SPRs sysfs file"
543 This option enables sysfs file creation for PMU SPRs like MMCR* and PMC*.
547 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
549 This enables the powerpc-specific perf_event back-end.
552 # Allow platforms to force SMP=y by selecting this
557 depends on PPC_BOOK3S || PPC_E500 || PPC_47x
558 select GENERIC_IRQ_MIGRATION
559 bool "Symmetric multi-processing support" if !FORCE_SMP
561 This enables support for systems with more than one CPU. If you have
562 a system with only one CPU, say N. If you have a system with more
563 than one CPU, say Y. Note that the kernel does not currently
564 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
565 since they have inadequate hardware support for multiprocessor
568 If you say N here, the kernel will run on single and multiprocessor
569 machines, but will use only one CPU of a multiprocessor machine. If
570 you say Y here, the kernel will run on single-processor machines.
571 On a single-processor machine, the kernel will run faster if you say
574 If you don't know what to do here, say N.
577 int "Maximum number of CPUs (2-8192)" if SMP
580 default "32" if PPC64
583 config NOT_COHERENT_CACHE
585 depends on 4xx || PPC_8xx || PPC_MPC512x || \
586 GAMECUBE_COMMON || AMIGAONE
587 select ARCH_HAS_DMA_PREP_COHERENT
588 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
589 select ARCH_HAS_SYNC_DMA_FOR_CPU
590 select DMA_DIRECT_REMAP
594 config CHECK_CACHE_COHERENCY
604 depends on PPC32 || COMPAT
606 This symbol controls whether we build the 32-bit VDSO. We obviously
607 want to do that if we're building a 32-bit kernel. If we're building
608 a 64-bit kernel then we only want a 32-bit VDSO if we're also enabling
612 prompt "Endianness selection"
613 default CPU_BIG_ENDIAN
615 This option selects whether a big endian or little endian kernel will
618 config CPU_BIG_ENDIAN
619 bool "Build big endian kernel"
621 Build a big endian kernel.
623 If unsure, select this option.
625 config CPU_LITTLE_ENDIAN
626 bool "Build little endian kernel"
627 depends on PPC_BOOK3S_64
628 select PPC64_BOOT_WRAPPER
630 Build a little endian kernel.
632 Note that if cross compiling a little endian kernel,
633 CROSS_COMPILE must point to a toolchain capable of targeting
634 little endian powerpc.
638 config PPC64_ELF_ABI_V1
639 def_bool PPC64 && (CPU_BIG_ENDIAN && !PPC64_BIG_ENDIAN_ELF_ABI_V2)
641 config PPC64_ELF_ABI_V2
642 def_bool PPC64 && !PPC64_ELF_ABI_V1
644 config PPC64_BOOT_WRAPPER
646 depends on CPU_LITTLE_ENDIAN