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 bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x
229 This must be enabled to support the Floating Point Unit
230 Most 6xx have an FPU but e300c2 core (mpc832x) don't have
231 an FPU, so when building an embedded kernel for that target
232 you can disable FPU support.
236 config FSL_EMB_PERFMON
237 bool "Freescale Embedded Perfmon"
238 depends on E500 || PPC_83xx
240 This is the Performance Monitor support found on the e500 core
241 and some e300 cores (c3 and c4). Select this only if your
242 core supports the Embedded Performance Monitor APU
244 config FSL_EMB_PERF_EVENT
246 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
249 config FSL_EMB_PERF_EVENT_E500
251 depends on FSL_EMB_PERF_EVENT && E500
256 depends on 40x || 44x
261 depends on E200 || E500 || 44x || PPC_BOOK3E
266 depends on (E200 || E500) && PPC32
269 # this is for common code between PPC32 & PPC64 FSL BOOKE
270 config PPC_FSL_BOOK3E
272 select FSL_EMB_PERFMON
273 select PPC_SMP_MUXED_IPI
274 select SYS_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
276 default y if FSL_BOOKE
280 depends on 44x || E500 || PPC_86xx
281 default y if PHYS_64BIT
284 bool 'Large physical address support' if E500 || PPC_86xx
285 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
286 select PHYS_ADDR_T_64BIT
288 This option enables kernel support for larger than 32-bit physical
289 addresses. This feature may not be available on all cores.
291 If you have more than 3.5GB of RAM or so, you also need to enable
292 SWIOTLB under Kernel Options for this to work. The actual number
293 is platform-dependent.
295 If in doubt, say N here.
298 bool "AltiVec Support"
299 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
301 This option enables kernel support for the Altivec extensions to the
302 PowerPC processor. The kernel currently supports saving and restoring
303 altivec registers, and turning on the 'altivec enable' bit so user
304 processes can execute altivec instructions.
306 This option is only usefully if you have a processor that supports
307 altivec (G4, otherwise known as 74xx series), but does not have
308 any affect on a non-altivec cpu (it does, however add code to the
311 If in doubt, say Y here.
315 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
318 This option enables kernel support for the Vector Scaler extensions
319 to the PowerPC processor. The kernel currently supports saving and
320 restoring VSX registers, and turning on the 'VSX enable' bit so user
321 processes can execute VSX instructions.
323 This option is only useful if you have a processor that supports
324 VSX (P7 and above), but does not have any affect on a non-VSX
325 CPUs (it does, however add code to the kernel).
327 If in doubt, say Y here.
331 depends on E200 || (E500 && !PPC_E500MC)
335 depends on SPE_POSSIBLE
338 This option enables kernel support for the Signal Processing
339 Extensions (SPE) to the PowerPC processor. The kernel currently
340 supports saving and restoring SPE registers, and turning on the
341 'spe enable' bit so user processes can execute SPE instructions.
343 This option is only useful if you have a processor that supports
344 SPE (e500, otherwise known as 85xx series), but does not have any
345 effect on a non-spe cpu (it does, however add code to the kernel).
347 If in doubt, say Y here.
349 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
351 depends on PPC_BOOK3S_64
354 bool "Radix MMU Support"
355 depends on PPC_BOOK3S_64
356 select ARCH_HAS_GIGANTIC_PAGE
361 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
362 is only implemented by IBM Power9 CPUs, if you don't have one of them
363 you can probably disable this.
365 config PPC_RADIX_MMU_DEFAULT
366 bool "Default to using the Radix MMU when possible"
367 depends on PPC_RADIX_MMU
370 When the hardware supports the Radix MMU, default to using it unless
371 "disable_radix[=yes]" is specified on the kernel command line.
373 If this option is disabled, the Hash MMU will be used by default,
374 unless "disable_radix=no" is specified on the kernel command line.
376 If you're unsure, say Y.
382 bool "Kernel Userspace Execution Prevention"
383 depends on PPC_HAVE_KUEP
384 default y if !PPC_BOOK3S_32
386 Enable support for Kernel Userspace Execution Prevention (KUEP)
388 If you're unsure, say Y.
394 bool "Kernel Userspace Access Protection"
395 depends on PPC_HAVE_KUAP
396 default y if !PPC_BOOK3S_32
398 Enable support for Kernel Userspace Access Protection (KUAP)
400 If you're unsure, say Y.
402 config PPC_KUAP_DEBUG
403 bool "Extra debugging for Kernel Userspace Access Protection"
404 depends on PPC_KUAP && (PPC_RADIX_MMU || PPC32)
406 Add extra debugging for Kernel Userspace Access Protection (KUAP)
407 If you're unsure, say N.
409 config ARCH_ENABLE_HUGEPAGE_MIGRATION
411 depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
414 config PPC_MMU_NOHASH
416 depends on !PPC_BOOK3S
418 config PPC_MMU_NOHASH_32
420 depends on PPC_MMU_NOHASH && PPC32
422 config PPC_BOOK3E_MMU
424 depends on FSL_BOOKE || PPC_BOOK3E
429 config PPC_HAVE_PMU_SUPPORT
433 bool "Create PMU SPRs sysfs file"
436 This option enables sysfs file creation for PMU SPRs like MMCR* and PMC*.
440 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
442 This enables the powerpc-specific perf_event back-end.
445 # Allow platforms to force SMP=y by selecting this
450 depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
451 select GENERIC_IRQ_MIGRATION
452 bool "Symmetric multi-processing support" if !FORCE_SMP
454 This enables support for systems with more than one CPU. If you have
455 a system with only one CPU, say N. If you have a system with more
456 than one CPU, say Y. Note that the kernel does not currently
457 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
458 since they have inadequate hardware support for multiprocessor
461 If you say N here, the kernel will run on single and multiprocessor
462 machines, but will use only one CPU of a multiprocessor machine. If
463 you say Y here, the kernel will run on single-processor machines.
464 On a single-processor machine, the kernel will run faster if you say
467 If you don't know what to do here, say N.
470 int "Maximum number of CPUs (2-8192)"
473 default "32" if PPC64
476 config NOT_COHERENT_CACHE
478 depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || \
479 GAMECUBE_COMMON || AMIGAONE
480 select ARCH_HAS_DMA_PREP_COHERENT
481 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
482 select ARCH_HAS_SYNC_DMA_FOR_CPU
483 select DMA_DIRECT_REMAP
487 config CHECK_CACHE_COHERENCY
497 depends on PPC32 || COMPAT
499 This symbol controls whether we build the 32-bit VDSO. We obviously
500 want to do that if we're building a 32-bit kernel. If we're building
501 a 64-bit kernel then we only want a 32-bit VDSO if we're also enabling
505 prompt "Endianness selection"
506 default CPU_BIG_ENDIAN
508 This option selects whether a big endian or little endian kernel will
511 config CPU_BIG_ENDIAN
512 bool "Build big endian kernel"
514 Build a big endian kernel.
516 If unsure, select this option.
518 config CPU_LITTLE_ENDIAN
519 bool "Build little endian kernel"
520 depends on PPC_BOOK3S_64
521 select PPC64_BOOT_WRAPPER
523 Build a little endian kernel.
525 Note that if cross compiling a little endian kernel,
526 CROSS_COMPILE must point to a toolchain capable of targeting
527 little endian powerpc.
531 config PPC64_BOOT_WRAPPER
533 depends on CPU_LITTLE_ENDIAN