1 # SPDX-License-Identifier: GPL-2.0
5 select KASAN_VMALLOC if KASAN && MODULES
11 This option selects whether a 32-bit or a 64-bit kernel
14 menu "Processor support"
16 prompt "Processor Type"
19 There are five families of 32 bit PowerPC chips supported.
20 The most common ones are the desktop and server CPUs (603,
21 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
22 embedded 512x/52xx/82xx/83xx/86xx counterparts.
23 The other embedded parts, namely 4xx, 8xx and e500
24 (85xx) each form a family of their own that is not compatible
27 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
30 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
32 select PPC_HAVE_PMU_SUPPORT
35 select HAVE_ARCH_VMAP_STACK
43 select ARCH_SUPPORTS_HUGETLBFS
47 select HAVE_ARCH_VMAP_STACK
58 bool "AMCC 44x, 46x or 47x"
69 bool "Support for 603 SW loaded TLB"
70 depends on PPC_BOOK3S_32
73 Provide support for processors based on the 603 cores. Those
74 processors don't have a HASH MMU and provide SW TLB loading.
77 bool "Support for 604+ HASH MMU" if PPC_BOOK3S_603
78 depends on PPC_BOOK3S_32
81 Provide support for processors not based on the 603 cores.
82 Those processors have a HASH MMU.
85 prompt "Processor Type"
88 There are two families of 64 bit PowerPC chips supported.
89 The most common ones are the desktop and server CPUs
90 (POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...)
92 The other are the "embedded" processors compliant with the
93 "Book 3E" variant of the architecture
96 bool "Server processors"
98 select PPC_HAVE_PMU_SUPPORT
99 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
100 select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
101 select ARCH_ENABLE_SPLIT_PMD_PTLOCK
102 select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
103 select ARCH_SUPPORTS_HUGETLBFS
104 select ARCH_SUPPORTS_NUMA_BALANCING
113 bool "Embedded processors"
114 select PPC_FSL_BOOK3E
115 select PPC_FPU # Make it a choice ?
116 select PPC_SMP_MUXED_IPI
123 prompt "CPU selection"
126 This will create a kernel which is optimised for a particular CPU.
127 The resulting kernel may not run on other CPUs, so use this with care.
129 If unsure, select Generic.
132 bool "Generic (POWER4 and above)"
133 depends on PPC64 && !CPU_LITTLE_ENDIAN
136 bool "Generic (POWER8 and above)"
137 depends on PPC64 && CPU_LITTLE_ENDIAN
138 select ARCH_HAS_FAST_MULTIPLIER
141 bool "Generic 32 bits powerpc"
142 depends on PPC32 && !PPC_8xx && !PPC_85xx
145 bool "Cell Broadband Engine"
146 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
150 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
154 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
158 depends on PPC_BOOK3S_64
159 select ARCH_HAS_FAST_MULTIPLIER
163 depends on PPC_BOOK3S_64
164 select ARCH_HAS_FAST_MULTIPLIER
168 depends on PPC_BOOK3S_64
169 select ARCH_HAS_FAST_MULTIPLIER
172 bool "Freescale e5500"
173 depends on PPC64 && E500
176 bool "Freescale e6500"
177 depends on PPC64 && E500
185 depends on PPC_BOOK3S_32
189 depends on PPC_BOOK3S_32
193 depends on PPC_BOOK3S_32
198 depends on PPC_85xx && !PPC_E500MC
202 depends on PPC_85xx && PPC_E500MC
204 config TOOLCHAIN_DEFAULT_CPU
205 bool "Rely on the toolchain's implicit default CPU"
210 config TARGET_CPU_BOOL
212 default !GENERIC_CPU && !TOOLCHAIN_DEFAULT_CPU
216 depends on TARGET_CPU_BOOL
217 default "cell" if CELL_CPU
218 default "power5" if POWER5_CPU
219 default "power6" if POWER6_CPU
220 default "power7" if POWER7_CPU
221 default "power8" if POWER8_CPU
222 default "power9" if POWER9_CPU
223 default "860" if 860_CPU
224 default "e300c2" if E300C2_CPU
225 default "e300c3" if E300C3_CPU
226 default "G4" if G4_CPU
227 default "8540" if E500_CPU
228 default "e500mc" if E500MC_CPU
229 default "powerpc" if POWERPC_CPU
233 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
237 depends on PPC_BOOK3E_64
240 select FSL_EMB_PERFMON
241 select PPC_FSL_BOOK3E
245 bool "e500mc Support"
250 This must be enabled for running on e500mc (and derivatives
251 such as e5500/e6500), and must be disabled for running on
258 bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x
262 This must be enabled to support the Floating Point Unit
263 Most 6xx have an FPU but e300c2 core (mpc832x) don't have
264 an FPU, so when building an embedded kernel for that target
265 you can disable FPU support.
269 config FSL_EMB_PERFMON
270 bool "Freescale Embedded Perfmon"
271 depends on E500 || PPC_83xx
273 This is the Performance Monitor support found on the e500 core
274 and some e300 cores (c3 and c4). Select this only if your
275 core supports the Embedded Performance Monitor APU
277 config FSL_EMB_PERF_EVENT
279 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
282 config FSL_EMB_PERF_EVENT_E500
284 depends on FSL_EMB_PERF_EVENT && E500
289 depends on 40x || 44x
294 depends on E500 || 44x || PPC_BOOK3E
299 depends on E500 && PPC32
302 # this is for common code between PPC32 & PPC64 FSL BOOKE
303 config PPC_FSL_BOOK3E
305 select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
306 imply FSL_EMB_PERFMON
307 select PPC_SMP_MUXED_IPI
309 default y if FSL_BOOKE
313 depends on 44x || E500 || PPC_86xx
314 default y if PHYS_64BIT
317 bool 'Large physical address support' if E500 || PPC_86xx
318 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
319 select PHYS_ADDR_T_64BIT
321 This option enables kernel support for larger than 32-bit physical
322 addresses. This feature may not be available on all cores.
324 If you have more than 3.5GB of RAM or so, you also need to enable
325 SWIOTLB under Kernel Options for this to work. The actual number
326 is platform-dependent.
328 If in doubt, say N here.
331 bool "AltiVec Support"
332 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
335 This option enables kernel support for the Altivec extensions to the
336 PowerPC processor. The kernel currently supports saving and restoring
337 altivec registers, and turning on the 'altivec enable' bit so user
338 processes can execute altivec instructions.
340 This option is only usefully if you have a processor that supports
341 altivec (G4, otherwise known as 74xx series), but does not have
342 any affect on a non-altivec cpu (it does, however add code to the
345 If in doubt, say Y here.
349 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
352 This option enables kernel support for the Vector Scaler extensions
353 to the PowerPC processor. The kernel currently supports saving and
354 restoring VSX registers, and turning on the 'VSX enable' bit so user
355 processes can execute VSX instructions.
357 This option is only useful if you have a processor that supports
358 VSX (P7 and above), but does not have any affect on a non-VSX
359 CPUs (it does, however add code to the kernel).
361 If in doubt, say Y here.
365 depends on E500 && !PPC_E500MC
369 depends on SPE_POSSIBLE
372 This option enables kernel support for the Signal Processing
373 Extensions (SPE) to the PowerPC processor. The kernel currently
374 supports saving and restoring SPE registers, and turning on the
375 'spe enable' bit so user processes can execute SPE instructions.
377 This option is only useful if you have a processor that supports
378 SPE (e500, otherwise known as 85xx series), but does not have any
379 effect on a non-spe cpu (it does, however add code to the kernel).
381 If in doubt, say Y here.
384 bool "Radix MMU Support"
385 depends on PPC_BOOK3S_64
386 select ARCH_HAS_GIGANTIC_PAGE
389 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
390 is only implemented by IBM Power9 CPUs, if you don't have one of them
391 you can probably disable this.
393 config PPC_RADIX_MMU_DEFAULT
394 bool "Default to using the Radix MMU when possible"
395 depends on PPC_RADIX_MMU
398 When the hardware supports the Radix MMU, default to using it unless
399 "disable_radix[=yes]" is specified on the kernel command line.
401 If this option is disabled, the Hash MMU will be used by default,
402 unless "disable_radix=no" is specified on the kernel command line.
404 If you're unsure, say Y.
410 bool "Kernel Userspace Execution Prevention"
411 depends on PPC_HAVE_KUEP
414 Enable support for Kernel Userspace Execution Prevention (KUEP)
416 If you're unsure, say Y.
422 bool "Kernel Userspace Access Protection"
423 depends on PPC_HAVE_KUAP
426 Enable support for Kernel Userspace Access Protection (KUAP)
428 If you're unsure, say Y.
430 config PPC_KUAP_DEBUG
431 bool "Extra debugging for Kernel Userspace Access Protection"
432 depends on PPC_KUAP && (PPC_RADIX_MMU || PPC32)
434 Add extra debugging for Kernel Userspace Access Protection (KUAP)
435 If you're unsure, say N.
439 depends on PPC_BOOK3S_64
440 depends on PPC_MEM_KEYS || PPC_KUAP || PPC_KUEP
443 config PPC_MMU_NOHASH
445 depends on !PPC_BOOK3S
447 config PPC_BOOK3E_MMU
449 depends on FSL_BOOKE || PPC_BOOK3E
454 config PPC_HAVE_PMU_SUPPORT
458 bool "Create PMU SPRs sysfs file"
461 This option enables sysfs file creation for PMU SPRs like MMCR* and PMC*.
465 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
467 This enables the powerpc-specific perf_event back-end.
470 # Allow platforms to force SMP=y by selecting this
475 depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
476 select GENERIC_IRQ_MIGRATION
477 bool "Symmetric multi-processing support" if !FORCE_SMP
479 This enables support for systems with more than one CPU. If you have
480 a system with only one CPU, say N. If you have a system with more
481 than one CPU, say Y. Note that the kernel does not currently
482 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
483 since they have inadequate hardware support for multiprocessor
486 If you say N here, the kernel will run on single and multiprocessor
487 machines, but will use only one CPU of a multiprocessor machine. If
488 you say Y here, the kernel will run on single-processor machines.
489 On a single-processor machine, the kernel will run faster if you say
492 If you don't know what to do here, say N.
495 int "Maximum number of CPUs (2-8192)" if SMP
498 default "32" if PPC64
501 config NOT_COHERENT_CACHE
503 depends on 4xx || PPC_8xx || PPC_MPC512x || \
504 GAMECUBE_COMMON || AMIGAONE
505 select ARCH_HAS_DMA_PREP_COHERENT
506 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
507 select ARCH_HAS_SYNC_DMA_FOR_CPU
508 select DMA_DIRECT_REMAP
512 config CHECK_CACHE_COHERENCY
522 depends on PPC32 || COMPAT
524 This symbol controls whether we build the 32-bit VDSO. We obviously
525 want to do that if we're building a 32-bit kernel. If we're building
526 a 64-bit kernel then we only want a 32-bit VDSO if we're also enabling
530 prompt "Endianness selection"
531 default CPU_BIG_ENDIAN
533 This option selects whether a big endian or little endian kernel will
536 config CPU_BIG_ENDIAN
537 bool "Build big endian kernel"
539 Build a big endian kernel.
541 If unsure, select this option.
543 config CPU_LITTLE_ENDIAN
544 bool "Build little endian kernel"
545 depends on PPC_BOOK3S_64
546 select PPC64_BOOT_WRAPPER
548 Build a little endian kernel.
550 Note that if cross compiling a little endian kernel,
551 CROSS_COMPILE must point to a toolchain capable of targeting
552 little endian powerpc.
556 config PPC64_BOOT_WRAPPER
558 depends on CPU_LITTLE_ENDIAN