1 # SPDX-License-Identifier: GPL-2.0
7 This option selects whether a 32-bit or a 64-bit kernel
10 menu "Processor support"
12 prompt "Processor Type"
15 There are five families of 32 bit PowerPC chips supported.
16 The most common ones are the desktop and server CPUs (601, 603,
17 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
18 embedded 512x/52xx/82xx/83xx/86xx counterparts.
19 The other embedded parts, namely 4xx, 8xx, e200 (55xx) and e500
20 (85xx) each form a family of their own that is not compatible
23 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
26 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
36 select SYS_SUPPORTS_HUGETLBFS
46 bool "AMCC 44x, 46x or 47x"
59 prompt "Processor Type"
62 There are two families of 64 bit PowerPC chips supported.
63 The most common ones are the desktop and server CPUs
64 (POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...)
66 The other are the "embedded" processors compliant with the
67 "Book 3E" variant of the architecture
70 bool "Server processors"
72 select PPC_HAVE_PMU_SUPPORT
73 select SYS_SUPPORTS_HUGETLBFS
74 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
75 select ARCH_SUPPORTS_NUMA_BALANCING
79 bool "Embedded processors"
80 select PPC_FPU # Make it a choice ?
81 select PPC_SMP_MUXED_IPI
87 prompt "CPU selection"
90 This will create a kernel which is optimised for a particular CPU.
91 The resulting kernel may not run on other CPUs, so use this with care.
93 If unsure, select Generic.
96 bool "Generic (POWER4 and above)"
97 depends on PPC64 && !CPU_LITTLE_ENDIAN
100 bool "Generic (POWER8 and above)"
101 depends on PPC64 && CPU_LITTLE_ENDIAN
102 select ARCH_HAS_FAST_MULTIPLIER
105 bool "Generic 32 bits powerpc"
106 depends on PPC32 && !PPC_8xx
109 bool "Cell Broadband Engine"
110 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
114 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
118 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
122 depends on PPC_BOOK3S_64
123 select ARCH_HAS_FAST_MULTIPLIER
127 depends on PPC_BOOK3S_64
128 select ARCH_HAS_FAST_MULTIPLIER
132 depends on PPC_BOOK3S_64
133 select ARCH_HAS_FAST_MULTIPLIER
136 bool "Freescale e5500"
137 depends on PPC64 && E500
140 bool "Freescale e6500"
141 depends on PPC64 && E500
149 depends on PPC_BOOK3S_32
153 depends on PPC_BOOK3S_32
157 config TARGET_CPU_BOOL
163 depends on TARGET_CPU_BOOL
164 default "cell" if CELL_CPU
165 default "power5" if POWER5_CPU
166 default "power6" if POWER6_CPU
167 default "power7" if POWER7_CPU
168 default "power8" if POWER8_CPU
169 default "power9" if POWER9_CPU
170 default "860" if 860_CPU
171 default "e300c2" if E300C2_CPU
172 default "e300c3" if E300C3_CPU
176 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
180 depends on PPC_BOOK3E_64
184 depends on PPC32 && PPC_BOOK3S
185 select PPC_HAVE_PMU_SUPPORT
188 select FSL_EMB_PERFMON
189 select PPC_FSL_BOOK3E
193 bool "e500mc Support"
198 This must be enabled for running on e500mc (and derivatives
199 such as e5500/e6500), and must be disabled for running on
206 config FSL_EMB_PERFMON
207 bool "Freescale Embedded Perfmon"
208 depends on E500 || PPC_83xx
210 This is the Performance Monitor support found on the e500 core
211 and some e300 cores (c3 and c4). Select this only if your
212 core supports the Embedded Performance Monitor APU
214 config FSL_EMB_PERF_EVENT
216 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
219 config FSL_EMB_PERF_EVENT_E500
221 depends on FSL_EMB_PERF_EVENT && E500
226 depends on 40x || 44x
231 depends on E200 || E500 || 44x || PPC_BOOK3E
236 depends on (E200 || E500) && PPC32
239 # this is for common code between PPC32 & PPC64 FSL BOOKE
240 config PPC_FSL_BOOK3E
242 select FSL_EMB_PERFMON
243 select PPC_SMP_MUXED_IPI
244 select SYS_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
246 default y if FSL_BOOKE
250 depends on 44x || E500 || PPC_86xx
251 default y if PHYS_64BIT
254 bool 'Large physical address support' if E500 || PPC_86xx
255 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
256 select PHYS_ADDR_T_64BIT
258 This option enables kernel support for larger than 32-bit physical
259 addresses. This feature may not be available on all cores.
261 If you have more than 3.5GB of RAM or so, you also need to enable
262 SWIOTLB under Kernel Options for this to work. The actual number
263 is platform-dependent.
265 If in doubt, say N here.
268 bool "AltiVec Support"
269 depends on 6xx || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
271 This option enables kernel support for the Altivec extensions to the
272 PowerPC processor. The kernel currently supports saving and restoring
273 altivec registers, and turning on the 'altivec enable' bit so user
274 processes can execute altivec instructions.
276 This option is only usefully if you have a processor that supports
277 altivec (G4, otherwise known as 74xx series), but does not have
278 any affect on a non-altivec cpu (it does, however add code to the
281 If in doubt, say Y here.
285 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
288 This option enables kernel support for the Vector Scaler extensions
289 to the PowerPC processor. The kernel currently supports saving and
290 restoring VSX registers, and turning on the 'VSX enable' bit so user
291 processes can execute VSX instructions.
293 This option is only useful if you have a processor that supports
294 VSX (P7 and above), but does not have any affect on a non-VSX
295 CPUs (it does, however add code to the kernel).
297 If in doubt, say Y here.
301 depends on E200 || (E500 && !PPC_E500MC)
305 depends on SPE_POSSIBLE
308 This option enables kernel support for the Signal Processing
309 Extensions (SPE) to the PowerPC processor. The kernel currently
310 supports saving and restoring SPE registers, and turning on the
311 'spe enable' bit so user processes can execute SPE instructions.
313 This option is only useful if you have a processor that supports
314 SPE (e500, otherwise known as 85xx series), but does not have any
315 effect on a non-spe cpu (it does, however add code to the kernel).
317 If in doubt, say Y here.
321 depends on PPC_BOOK3S
323 config PPC_STD_MMU_32
325 depends on PPC_STD_MMU && PPC32
327 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
329 depends on PPC_BOOK3S_64
332 bool "Radix MMU Support"
333 depends on PPC_BOOK3S_64 && HUGETLB_PAGE
334 select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
337 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
338 is only implemented by IBM Power9 CPUs, if you don't have one of them
339 you can probably disable this.
341 config PPC_RADIX_MMU_DEFAULT
342 bool "Default to using the Radix MMU when possible"
343 depends on PPC_RADIX_MMU
346 When the hardware supports the Radix MMU, default to using it unless
347 "disable_radix[=yes]" is specified on the kernel command line.
349 If this option is disabled, the Hash MMU will be used by default,
350 unless "disable_radix=no" is specified on the kernel command line.
352 If you're unsure, say Y.
354 config ARCH_ENABLE_HUGEPAGE_MIGRATION
356 depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
359 config PPC_MMU_NOHASH
361 depends on !PPC_STD_MMU
363 config PPC_BOOK3E_MMU
365 depends on FSL_BOOKE || PPC_BOOK3E
369 default y if PPC_BOOK3S_64
370 default y if PPC_8xx && HUGETLB_PAGE
373 config PPC_HAVE_PMU_SUPPORT
378 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
380 This enables the powerpc-specific perf_event back-end.
383 # Allow platforms to force SMP=y by selecting this
389 depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
390 select GENERIC_IRQ_MIGRATION
391 bool "Symmetric multi-processing support" if !FORCE_SMP
393 This enables support for systems with more than one CPU. If you have
394 a system with only one CPU, say N. If you have a system with more
395 than one CPU, say Y. Note that the kernel does not currently
396 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
397 since they have inadequate hardware support for multiprocessor
400 If you say N here, the kernel will run on single and multiprocessor
401 machines, but will use only one CPU of a multiprocessor machine. If
402 you say Y here, the kernel will run on single-processor machines.
403 On a single-processor machine, the kernel will run faster if you say
406 If you don't know what to do here, say N.
409 int "Maximum number of CPUs (2-8192)"
412 default "32" if PPC64
415 config NOT_COHERENT_CACHE
417 depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || GAMECUBE_COMMON
421 config CHECK_CACHE_COHERENCY
432 depends on PPC32 || CPU_BIG_ENDIAN
434 This symbol controls whether we build the 32-bit VDSO. We obviously
435 want to do that if we're building a 32-bit kernel. If we're building
436 a 64-bit kernel then we only want a 32-bit VDSO if we're building for
437 big endian. That is because the only little endian configuration we
438 support is ppc64le which is 64-bit only.
441 prompt "Endianness selection"
442 default CPU_BIG_ENDIAN
444 This option selects whether a big endian or little endian kernel will
447 config CPU_BIG_ENDIAN
448 bool "Build big endian kernel"
450 Build a big endian kernel.
452 If unsure, select this option.
454 config CPU_LITTLE_ENDIAN
455 bool "Build little endian kernel"
456 depends on PPC_BOOK3S_64
457 select PPC64_BOOT_WRAPPER
459 Build a little endian kernel.
461 Note that if cross compiling a little endian kernel,
462 CROSS_COMPILE must point to a toolchain capable of targeting
463 little endian powerpc.
467 config PPC64_BOOT_WRAPPER
469 depends on CPU_LITTLE_ENDIAN