1 # SPDX-License-Identifier: GPL-2.0
6 This option selects whether a 32-bit or a 64-bit kernel
9 menu "Processor support"
11 prompt "Processor Type"
14 There are five families of 32 bit PowerPC chips supported.
15 The most common ones are the desktop and server CPUs (601, 603,
16 604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
17 embedded 512x/52xx/82xx/83xx/86xx counterparts.
18 The other embedded parts, namely 4xx, 8xx, e200 (55xx) and e500
19 (85xx) each form a family of their own that is not compatible
22 If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
25 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
27 select PPC_HAVE_PMU_SUPPORT
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_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
76 select ARCH_SUPPORTS_NUMA_BALANCING
80 bool "Embedded processors"
81 select PPC_FPU # Make it a choice ?
82 select PPC_SMP_MUXED_IPI
88 prompt "CPU selection"
91 This will create a kernel which is optimised for a particular CPU.
92 The resulting kernel may not run on other CPUs, so use this with care.
94 If unsure, select Generic.
97 bool "Generic (POWER4 and above)"
98 depends on PPC64 && !CPU_LITTLE_ENDIAN
101 bool "Generic (POWER8 and above)"
102 depends on PPC64 && CPU_LITTLE_ENDIAN
103 select ARCH_HAS_FAST_MULTIPLIER
106 bool "Generic 32 bits powerpc"
107 depends on PPC32 && !PPC_8xx
110 bool "Cell Broadband Engine"
111 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
115 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
119 depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
123 depends on PPC_BOOK3S_64
124 select ARCH_HAS_FAST_MULTIPLIER
128 depends on PPC_BOOK3S_64
129 select ARCH_HAS_FAST_MULTIPLIER
133 depends on PPC_BOOK3S_64
134 select ARCH_HAS_FAST_MULTIPLIER
137 bool "Freescale e5500"
141 bool "Freescale e6500"
150 depends on PPC_BOOK3S_32
154 depends on PPC_BOOK3S_32
158 depends on PPC_BOOK3S_32
163 config TARGET_CPU_BOOL
169 depends on TARGET_CPU_BOOL
170 default "cell" if CELL_CPU
171 default "power5" if POWER5_CPU
172 default "power6" if POWER6_CPU
173 default "power7" if POWER7_CPU
174 default "power8" if POWER8_CPU
175 default "power9" if POWER9_CPU
176 default "860" if 860_CPU
177 default "e300c2" if E300C2_CPU
178 default "e300c3" if E300C3_CPU
179 default "G4" if G4_CPU
183 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
187 depends on PPC_BOOK3E_64
190 select FSL_EMB_PERFMON
191 select PPC_FSL_BOOK3E
195 bool "e500mc Support"
200 This must be enabled for running on e500mc (and derivatives
201 such as e5500/e6500), and must be disabled for running on
208 config FSL_EMB_PERFMON
209 bool "Freescale Embedded Perfmon"
210 depends on E500 || PPC_83xx
212 This is the Performance Monitor support found on the e500 core
213 and some e300 cores (c3 and c4). Select this only if your
214 core supports the Embedded Performance Monitor APU
216 config FSL_EMB_PERF_EVENT
218 depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
221 config FSL_EMB_PERF_EVENT_E500
223 depends on FSL_EMB_PERF_EVENT && E500
228 depends on 40x || 44x
233 depends on E200 || E500 || 44x || PPC_BOOK3E
238 depends on (E200 || E500) && PPC32
241 # this is for common code between PPC32 & PPC64 FSL BOOKE
242 config PPC_FSL_BOOK3E
244 select FSL_EMB_PERFMON
245 select PPC_SMP_MUXED_IPI
246 select SYS_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
248 default y if FSL_BOOKE
252 depends on 44x || E500 || PPC_86xx
253 default y if PHYS_64BIT
256 bool 'Large physical address support' if E500 || PPC_86xx
257 depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
258 select PHYS_ADDR_T_64BIT
260 This option enables kernel support for larger than 32-bit physical
261 addresses. This feature may not be available on all cores.
263 If you have more than 3.5GB of RAM or so, you also need to enable
264 SWIOTLB under Kernel Options for this to work. The actual number
265 is platform-dependent.
267 If in doubt, say N here.
270 bool "AltiVec Support"
271 depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
273 This option enables kernel support for the Altivec extensions to the
274 PowerPC processor. The kernel currently supports saving and restoring
275 altivec registers, and turning on the 'altivec enable' bit so user
276 processes can execute altivec instructions.
278 This option is only usefully if you have a processor that supports
279 altivec (G4, otherwise known as 74xx series), but does not have
280 any affect on a non-altivec cpu (it does, however add code to the
283 If in doubt, say Y here.
287 depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
290 This option enables kernel support for the Vector Scaler extensions
291 to the PowerPC processor. The kernel currently supports saving and
292 restoring VSX registers, and turning on the 'VSX enable' bit so user
293 processes can execute VSX instructions.
295 This option is only useful if you have a processor that supports
296 VSX (P7 and above), but does not have any affect on a non-VSX
297 CPUs (it does, however add code to the kernel).
299 If in doubt, say Y here.
303 depends on E200 || (E500 && !PPC_E500MC)
307 depends on SPE_POSSIBLE
310 This option enables kernel support for the Signal Processing
311 Extensions (SPE) to the PowerPC processor. The kernel currently
312 supports saving and restoring SPE registers, and turning on the
313 'spe enable' bit so user processes can execute SPE instructions.
315 This option is only useful if you have a processor that supports
316 SPE (e500, otherwise known as 85xx series), but does not have any
317 effect on a non-spe cpu (it does, however add code to the kernel).
319 If in doubt, say Y here.
321 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
323 depends on PPC_BOOK3S_64
326 bool "Radix MMU Support"
327 depends on PPC_BOOK3S_64 && HUGETLB_PAGE
328 select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
331 Enable support for the Power ISA 3.0 Radix style MMU. Currently this
332 is only implemented by IBM Power9 CPUs, if you don't have one of them
333 you can probably disable this.
335 config PPC_RADIX_MMU_DEFAULT
336 bool "Default to using the Radix MMU when possible"
337 depends on PPC_RADIX_MMU
340 When the hardware supports the Radix MMU, default to using it unless
341 "disable_radix[=yes]" is specified on the kernel command line.
343 If this option is disabled, the Hash MMU will be used by default,
344 unless "disable_radix=no" is specified on the kernel command line.
346 If you're unsure, say Y.
348 config ARCH_ENABLE_HUGEPAGE_MIGRATION
350 depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
353 config PPC_MMU_NOHASH
355 depends on !PPC_BOOK3S
357 config PPC_BOOK3E_MMU
359 depends on FSL_BOOKE || PPC_BOOK3E
363 default y if PPC_BOOK3S_64
364 default y if PPC_8xx && HUGETLB_PAGE
366 config PPC_HAVE_PMU_SUPPORT
371 depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
373 This enables the powerpc-specific perf_event back-end.
376 # Allow platforms to force SMP=y by selecting this
381 depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
382 select GENERIC_IRQ_MIGRATION
383 bool "Symmetric multi-processing support" if !FORCE_SMP
385 This enables support for systems with more than one CPU. If you have
386 a system with only one CPU, say N. If you have a system with more
387 than one CPU, say Y. Note that the kernel does not currently
388 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
389 since they have inadequate hardware support for multiprocessor
392 If you say N here, the kernel will run on single and multiprocessor
393 machines, but will use only one CPU of a multiprocessor machine. If
394 you say Y here, the kernel will run on single-processor machines.
395 On a single-processor machine, the kernel will run faster if you say
398 If you don't know what to do here, say N.
401 int "Maximum number of CPUs (2-8192)"
404 default "32" if PPC64
407 config NOT_COHERENT_CACHE
409 depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || \
410 GAMECUBE_COMMON || AMIGAONE
411 select ARCH_HAS_DMA_COHERENT_TO_PFN
412 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
413 select ARCH_HAS_SYNC_DMA_FOR_CPU
417 config CHECK_CACHE_COHERENCY
427 depends on PPC32 || CPU_BIG_ENDIAN
429 This symbol controls whether we build the 32-bit VDSO. We obviously
430 want to do that if we're building a 32-bit kernel. If we're building
431 a 64-bit kernel then we only want a 32-bit VDSO if we're building for
432 big endian. That is because the only little endian configuration we
433 support is ppc64le which is 64-bit only.
436 prompt "Endianness selection"
437 default CPU_BIG_ENDIAN
439 This option selects whether a big endian or little endian kernel will
442 config CPU_BIG_ENDIAN
443 bool "Build big endian kernel"
445 Build a big endian kernel.
447 If unsure, select this option.
449 config CPU_LITTLE_ENDIAN
450 bool "Build little endian kernel"
451 depends on PPC_BOOK3S_64
452 select PPC64_BOOT_WRAPPER
454 Build a little endian kernel.
456 Note that if cross compiling a little endian kernel,
457 CROSS_COMPILE must point to a toolchain capable of targeting
458 little endian powerpc.
462 config PPC64_BOOT_WRAPPER
464 depends on CPU_LITTLE_ENDIAN