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
17 menu "Processor support"
19 prompt "Processor Type"
22 There are five families of 32 bit PowerPC chips supported.
23 The most common ones are the desktop and server CPUs (603,
24 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
25 embedded 512x/52xx/82xx/83xx/86xx counterparts.
26 The other embedded parts, namely 4xx, 8xx, e200 (55xx) and e500
27 (85xx) each form a family of their own that is not compatible
30 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
33 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
36 select PPC_HAVE_PMU_SUPPORT
39 select HAVE_ARCH_VMAP_STACK if !ADB_PMU
48 select SYS_SUPPORTS_HUGETLBFS
51 select HAVE_ARCH_VMAP_STACK
62 bool "AMCC 44x, 46x or 47x"
75 prompt "Processor Type"
78 There are two families of 64 bit PowerPC chips supported.
79 The most common ones are the desktop and server CPUs
80 (POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...)
82 The other are the "embedded" processors compliant with the
83 "Book 3E" variant of the architecture
86 bool "Server processors"
88 select PPC_HAVE_PMU_SUPPORT
89 select SYS_SUPPORTS_HUGETLBFS
90 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
91 select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
92 select ARCH_SUPPORTS_NUMA_BALANCING
97 bool "Embedded processors"
98 select PPC_FPU # Make it a choice ?
99 select PPC_SMP_MUXED_IPI
105 prompt "CPU selection"
108 This will create a kernel which is optimised for a particular CPU.
109 The resulting kernel may not run on other CPUs, so use this with care.
111 If unsure, select Generic.
114 bool "Generic (POWER4 and above)"
115 depends on PPC64 && !CPU_LITTLE_ENDIAN
118 bool "Generic (POWER8 and above)"
119 depends on PPC64 && CPU_LITTLE_ENDIAN
120 select ARCH_HAS_FAST_MULTIPLIER
123 bool "Generic 32 bits powerpc"
124 depends on PPC32 && !PPC_8xx
127 bool "Cell Broadband Engine"
128 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
132 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
136 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
140 depends on PPC_BOOK3S_64
141 select ARCH_HAS_FAST_MULTIPLIER
145 depends on PPC_BOOK3S_64
146 select ARCH_HAS_FAST_MULTIPLIER
150 depends on PPC_BOOK3S_64
151 select ARCH_HAS_FAST_MULTIPLIER
154 bool "Freescale e5500"
158 bool "Freescale e6500"
167 depends on PPC_BOOK3S_32
171 depends on PPC_BOOK3S_32
175 depends on PPC_BOOK3S_32
180 config TARGET_CPU_BOOL
186 depends on TARGET_CPU_BOOL
187 default "cell" if CELL_CPU
188 default "power5" if POWER5_CPU
189 default "power6" if POWER6_CPU
190 default "power7" if POWER7_CPU
191 default "power8" if POWER8_CPU
192 default "power9" if POWER9_CPU
193 default "860" if 860_CPU
194 default "e300c2" if E300C2_CPU
195 default "e300c3" if E300C3_CPU
196 default "G4" if G4_CPU
200 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
204 depends on PPC_BOOK3E_64
207 select FSL_EMB_PERFMON
208 select PPC_FSL_BOOK3E
212 bool "e500mc Support"
217 This must be enabled for running on e500mc (and derivatives
218 such as e5500/e6500), and must be disabled for running on
225 config FSL_EMB_PERFMON
226 bool "Freescale Embedded Perfmon"
227 depends on E500 || PPC_83xx
229 This is the Performance Monitor support found on the e500 core
230 and some e300 cores (c3 and c4). Select this only if your
231 core supports the Embedded Performance Monitor APU
233 config FSL_EMB_PERF_EVENT
235 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
238 config FSL_EMB_PERF_EVENT_E500
240 depends on FSL_EMB_PERF_EVENT && E500
245 depends on 40x || 44x
250 depends on E200 || E500 || 44x || PPC_BOOK3E
255 depends on (E200 || E500) && PPC32
258 # this is for common code between PPC32 & PPC64 FSL BOOKE
259 config PPC_FSL_BOOK3E
261 select FSL_EMB_PERFMON
262 select PPC_SMP_MUXED_IPI
263 select SYS_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
265 default y if FSL_BOOKE
269 depends on 44x || E500 || PPC_86xx
270 default y if PHYS_64BIT
273 bool 'Large physical address support' if E500 || PPC_86xx
274 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
275 select PHYS_ADDR_T_64BIT
277 This option enables kernel support for larger than 32-bit physical
278 addresses. This feature may not be available on all cores.
280 If you have more than 3.5GB of RAM or so, you also need to enable
281 SWIOTLB under Kernel Options for this to work. The actual number
282 is platform-dependent.
284 If in doubt, say N here.
287 bool "AltiVec Support"
288 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
290 This option enables kernel support for the Altivec extensions to the
291 PowerPC processor. The kernel currently supports saving and restoring
292 altivec registers, and turning on the 'altivec enable' bit so user
293 processes can execute altivec instructions.
295 This option is only usefully if you have a processor that supports
296 altivec (G4, otherwise known as 74xx series), but does not have
297 any affect on a non-altivec cpu (it does, however add code to the
300 If in doubt, say Y here.
304 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
307 This option enables kernel support for the Vector Scaler extensions
308 to the PowerPC processor. The kernel currently supports saving and
309 restoring VSX registers, and turning on the 'VSX enable' bit so user
310 processes can execute VSX instructions.
312 This option is only useful if you have a processor that supports
313 VSX (P7 and above), but does not have any affect on a non-VSX
314 CPUs (it does, however add code to the kernel).
316 If in doubt, say Y here.
320 depends on E200 || (E500 && !PPC_E500MC)
324 depends on SPE_POSSIBLE
327 This option enables kernel support for the Signal Processing
328 Extensions (SPE) to the PowerPC processor. The kernel currently
329 supports saving and restoring SPE registers, and turning on the
330 'spe enable' bit so user processes can execute SPE instructions.
332 This option is only useful if you have a processor that supports
333 SPE (e500, otherwise known as 85xx series), but does not have any
334 effect on a non-spe cpu (it does, however add code to the kernel).
336 If in doubt, say Y here.
338 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
340 depends on PPC_BOOK3S_64
343 bool "Radix MMU Support"
344 depends on PPC_BOOK3S_64
345 select ARCH_HAS_GIGANTIC_PAGE
350 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
351 is only implemented by IBM Power9 CPUs, if you don't have one of them
352 you can probably disable this.
354 config PPC_RADIX_MMU_DEFAULT
355 bool "Default to using the Radix MMU when possible"
356 depends on PPC_RADIX_MMU
359 When the hardware supports the Radix MMU, default to using it unless
360 "disable_radix[=yes]" is specified on the kernel command line.
362 If this option is disabled, the Hash MMU will be used by default,
363 unless "disable_radix=no" is specified on the kernel command line.
365 If you're unsure, say Y.
371 bool "Kernel Userspace Execution Prevention"
372 depends on PPC_HAVE_KUEP
373 default y if !PPC_BOOK3S_32
375 Enable support for Kernel Userspace Execution Prevention (KUEP)
377 If you're unsure, say Y.
383 bool "Kernel Userspace Access Protection"
384 depends on PPC_HAVE_KUAP
385 default y if !PPC_BOOK3S_32
387 Enable support for Kernel Userspace Access Protection (KUAP)
389 If you're unsure, say Y.
391 config PPC_KUAP_DEBUG
392 bool "Extra debugging for Kernel Userspace Access Protection"
393 depends on PPC_KUAP && (PPC_RADIX_MMU || PPC32)
395 Add extra debugging for Kernel Userspace Access Protection (KUAP)
396 If you're unsure, say N.
398 config ARCH_ENABLE_HUGEPAGE_MIGRATION
400 depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
403 config PPC_MMU_NOHASH
405 depends on !PPC_BOOK3S
407 config PPC_MMU_NOHASH_32
409 depends on PPC_MMU_NOHASH && PPC32
411 config PPC_BOOK3E_MMU
413 depends on FSL_BOOKE || PPC_BOOK3E
418 config PPC_HAVE_PMU_SUPPORT
422 bool "Create PMU SPRs sysfs file"
425 This option enables sysfs file creation for PMU SPRs like MMCR* and PMC*.
429 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
431 This enables the powerpc-specific perf_event back-end.
434 # Allow platforms to force SMP=y by selecting this
439 depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
440 select GENERIC_IRQ_MIGRATION
441 bool "Symmetric multi-processing support" if !FORCE_SMP
443 This enables support for systems with more than one CPU. If you have
444 a system with only one CPU, say N. If you have a system with more
445 than one CPU, say Y. Note that the kernel does not currently
446 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
447 since they have inadequate hardware support for multiprocessor
450 If you say N here, the kernel will run on single and multiprocessor
451 machines, but will use only one CPU of a multiprocessor machine. If
452 you say Y here, the kernel will run on single-processor machines.
453 On a single-processor machine, the kernel will run faster if you say
456 If you don't know what to do here, say N.
459 int "Maximum number of CPUs (2-8192)"
462 default "32" if PPC64
465 config NOT_COHERENT_CACHE
467 depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || \
468 GAMECUBE_COMMON || AMIGAONE
469 select ARCH_HAS_DMA_PREP_COHERENT
470 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
471 select ARCH_HAS_SYNC_DMA_FOR_CPU
472 select DMA_DIRECT_REMAP
476 config CHECK_CACHE_COHERENCY
486 depends on PPC32 || COMPAT
488 This symbol controls whether we build the 32-bit VDSO. We obviously
489 want to do that if we're building a 32-bit kernel. If we're building
490 a 64-bit kernel then we only want a 32-bit VDSO if we're also enabling
494 prompt "Endianness selection"
495 default CPU_BIG_ENDIAN
497 This option selects whether a big endian or little endian kernel will
500 config CPU_BIG_ENDIAN
501 bool "Build big endian kernel"
503 Build a big endian kernel.
505 If unsure, select this option.
507 config CPU_LITTLE_ENDIAN
508 bool "Build little endian kernel"
509 depends on PPC_BOOK3S_64
510 select PPC64_BOOT_WRAPPER
512 Build a little endian kernel.
514 Note that if cross compiling a little endian kernel,
515 CROSS_COMPILE must point to a toolchain capable of targeting
516 little endian powerpc.
520 config PPC64_BOOT_WRAPPER
522 depends on CPU_LITTLE_ENDIAN