# SPDX-License-Identifier: GPL-2.0
config PPC32
bool
default y if !PPC64
config PPC64
bool "64-bit kernel"
select ZLIB_DEFLATE
help
This option selects whether a 32-bit or a 64-bit kernel
will be built.
menu "Processor support"
choice
prompt "Processor Type"
depends on PPC32
help
There are five families of 32 bit PowerPC chips supported.
The most common ones are the desktop and server CPUs (603,
604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
embedded 512x/52xx/82xx/83xx/86xx counterparts.
The other embedded parts, namely 4xx, 8xx and e500
(85xx) each form a family of their own that is not compatible
with the others.
If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
config PPC_BOOK3S_32
bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
imply PPC_FPU
select PPC_HAVE_PMU_SUPPORT
select HAVE_ARCH_VMAP_STACK
config PPC_85xx
bool "Freescale 85xx"
select PPC_E500
config PPC_8xx
bool "Freescale 8xx"
select ARCH_SUPPORTS_HUGETLBFS
select FSL_SOC
select PPC_KUEP
select HAVE_ARCH_VMAP_STACK
select HUGETLBFS
config 40x
bool "AMCC 40x"
select PPC_DCR_NATIVE
select PPC_UDBG_16550
select 4xx_SOC
select HAVE_PCI
select PPC_KUEP if PPC_KUAP
config 44x
bool "AMCC 44x, 46x or 47x"
select PPC_DCR_NATIVE
select PPC_UDBG_16550
select 4xx_SOC
select HAVE_PCI
select PHYS_64BIT
select PPC_KUEP
endchoice
config PPC_BOOK3S_603
bool "Support for 603 SW loaded TLB"
depends on PPC_BOOK3S_32
default y
help
Provide support for processors based on the 603 cores. Those
processors don't have a HASH MMU and provide SW TLB loading.
config PPC_BOOK3S_604
bool "Support for 604+ HASH MMU" if PPC_BOOK3S_603
depends on PPC_BOOK3S_32
default y
help
Provide support for processors not based on the 603 cores.
Those processors have a HASH MMU.
choice
prompt "Processor Type"
depends on PPC64
help
There are two families of 64 bit PowerPC chips supported.
The most common ones are the desktop and server CPUs
(POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...)
The other are the "embedded" processors compliant with the
"Book 3E" variant of the architecture
config PPC_BOOK3S_64
bool "Server processors"
select PPC_FPU
select PPC_HAVE_PMU_SUPPORT
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
select ARCH_ENABLE_SPLIT_PMD_PTLOCK
select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
select ARCH_SUPPORTS_HUGETLBFS
select ARCH_SUPPORTS_NUMA_BALANCING
select HAVE_MOVE_PMD
select HAVE_MOVE_PUD
select IRQ_WORK
select PPC_64S_HASH_MMU if !PPC_RADIX_MMU
select KASAN_VMALLOC if KASAN
config PPC_BOOK3E_64
bool "Embedded processors"
select PPC_E500
select PPC_E500MC
select PPC_FPU # Make it a choice ?
select PPC_SMP_MUXED_IPI
select PPC_DOORBELL
select ZONE_DMA
endchoice
choice
prompt "CPU selection"
help
This will create a kernel which is optimised for a particular CPU.
The resulting kernel may not run on other CPUs, so use this with care.
If unsure, select Generic.
config POWERPC64_CPU
bool "Generic (POWER5 and PowerPC 970 and above)"
depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
select PPC_64S_HASH_MMU
config POWERPC64_CPU
bool "Generic (POWER8 and above)"
depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
select ARCH_HAS_FAST_MULTIPLIER
select PPC_64S_HASH_MMU
select PPC_HAS_LBARX_LHARX
config POWERPC_CPU
bool "Generic 32 bits powerpc"
depends on PPC_BOOK3S_32
config CELL_CPU
bool "Cell Broadband Engine"
depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
depends on !CC_IS_CLANG
select PPC_64S_HASH_MMU
config PPC_970_CPU
bool "PowerPC 970 (including PowerPC G5)"
depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
select PPC_64S_HASH_MMU
config POWER6_CPU
bool "POWER6"
depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
select PPC_64S_HASH_MMU
config POWER7_CPU
bool "POWER7"
depends on PPC_BOOK3S_64
select ARCH_HAS_FAST_MULTIPLIER
select PPC_64S_HASH_MMU
select PPC_HAS_LBARX_LHARX
config POWER8_CPU
bool "POWER8"
depends on PPC_BOOK3S_64
select ARCH_HAS_FAST_MULTIPLIER
select PPC_64S_HASH_MMU
select PPC_HAS_LBARX_LHARX
config POWER9_CPU
bool "POWER9"
depends on PPC_BOOK3S_64
select ARCH_HAS_FAST_MULTIPLIER
select PPC_HAS_LBARX_LHARX
config POWER10_CPU
bool "POWER10"
depends on PPC_BOOK3S_64
select ARCH_HAS_FAST_MULTIPLIER
select PPC_HAVE_PREFIXED_SUPPORT
select PPC_HAVE_PCREL_SUPPORT
config E5500_CPU
bool "Freescale e5500"
depends on PPC64 && PPC_E500
config E6500_CPU
bool "Freescale e6500"
depends on PPC64 && PPC_E500
depends on !CC_IS_CLANG
select PPC_HAS_LBARX_LHARX
config 405_CPU
bool "40x family"
depends on 40x
depends on !CC_IS_CLANG
config 440_CPU
bool "440 (44x family)"
depends on 44x
config 464_CPU
bool "464 (44x family)"
depends on 44x
depends on !CC_IS_CLANG
config 476_CPU
bool "476 (47x family)"
depends on PPC_47x
depends on !CC_IS_CLANG
config 860_CPU
bool "8xx family"
depends on PPC_8xx
depends on !CC_IS_CLANG
config E300C2_CPU
bool "e300c2 (832x)"
depends on PPC_BOOK3S_32
depends on !CC_IS_CLANG
config E300C3_CPU
bool "e300c3 (831x)"
depends on PPC_BOOK3S_32
depends on !CC_IS_CLANG
config G4_CPU
bool "G4 (74xx)"
depends on PPC_BOOK3S_32
select ALTIVEC
config E500_CPU
bool "e500 (8540)"
depends on PPC_85xx && !PPC_E500MC
config E500MC_CPU
bool "e500mc"
depends on PPC_85xx && PPC_E500MC
config TOOLCHAIN_DEFAULT_CPU
bool "Rely on the toolchain's implicit default CPU"
endchoice
config TARGET_CPU_BOOL
bool
default !TOOLCHAIN_DEFAULT_CPU
config TARGET_CPU
string
depends on TARGET_CPU_BOOL
default "cell" if CELL_CPU
default "970" if PPC_970_CPU
default "power6" if POWER6_CPU
default "power7" if POWER7_CPU
default "power8" if POWER8_CPU
default "power9" if POWER9_CPU
default "power10" if POWER10_CPU
default "e5500" if E5500_CPU
default "e6500" if E6500_CPU
default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN
default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN
default "405" if 405_CPU
default "440" if 440_CPU
default "464" if 464_CPU
default "476" if 476_CPU
default "860" if 860_CPU
default "e300c2" if E300C2_CPU
default "e300c3" if E300C3_CPU
default "G4" if G4_CPU
default "8540" if E500_CPU
default "e500mc" if E500MC_CPU
default "powerpc" if POWERPC_CPU
config TUNE_CPU
string
depends on POWERPC64_CPU
default "-mtune=power10" if $(cc-option,-mtune=power10)
default "-mtune=power9" if $(cc-option,-mtune=power9)
default "-mtune=power8" if $(cc-option,-mtune=power8)
config PPC_BOOK3S
def_bool y
depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
config PPC_E500
select FSL_EMB_PERFMON
bool
select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
select PPC_SMP_MUXED_IPI
select PPC_DOORBELL
select PPC_KUEP
config PPC_E500MC
bool "e500mc Support"
select PPC_FPU
select COMMON_CLK
depends on PPC_E500
help
This must be enabled for running on e500mc (and derivatives
such as e5500/e6500), and must be disabled for running on
e500v1 or e500v2.
config PPC_FPU_REGS
bool
config PPC_FPU
bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x
default y if PPC64
select PPC_FPU_REGS
help
This must be enabled to support the Floating Point Unit
Most 6xx have an FPU but e300c2 core (mpc832x) don't have
an FPU, so when building an embedded kernel for that target
you can disable FPU support.
If unsure say Y.
config FSL_EMB_PERFMON
bool "Freescale Embedded Perfmon"
depends on PPC_E500 || PPC_83xx
help
This is the Performance Monitor support found on the e500 core
and some e300 cores (c3 and c4). Select this only if your
core supports the Embedded Performance Monitor APU
config FSL_EMB_PERF_EVENT
bool
depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
default y
config FSL_EMB_PERF_EVENT_E500
bool
depends on FSL_EMB_PERF_EVENT && PPC_E500
default y
config 4xx
bool
depends on 40x || 44x
default y
config BOOKE
bool
depends on PPC_E500 || 44x
default y
config BOOKE_OR_40x
bool
depends on BOOKE || 40x
default y
config PTE_64BIT
bool
depends on 44x || PPC_E500 || PPC_86xx
default y if PHYS_64BIT
config PHYS_64BIT
bool 'Large physical address support' if PPC_E500 || PPC_86xx
depends on (44x || PPC_E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
select PHYS_ADDR_T_64BIT
help
This option enables kernel support for larger than 32-bit physical
addresses. This feature may not be available on all cores.
If you have more than 3.5GB of RAM or so, you also need to enable
SWIOTLB under Kernel Options for this to work. The actual number
is platform-dependent.
If in doubt, say N here.
config ALTIVEC
bool "AltiVec Support"
depends on PPC_BOOK3S || (PPC_E500MC && PPC64 && !E5500_CPU)
select PPC_FPU
help
This option enables kernel support for the Altivec extensions to the
PowerPC processor. The kernel currently supports saving and restoring
altivec registers, and turning on the 'altivec enable' bit so user
processes can execute altivec instructions.
This option is only usefully if you have a processor that supports
altivec (G4, otherwise known as 74xx series), but does not have
any affect on a non-altivec cpu (it does, however add code to the
kernel).
If in doubt, say Y here.
config VSX
bool "VSX Support"
depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
help
This option enables kernel support for the Vector Scaler extensions
to the PowerPC processor. The kernel currently supports saving and
restoring VSX registers, and turning on the 'VSX enable' bit so user
processes can execute VSX instructions.
This option is only useful if you have a processor that supports
VSX (P7 and above), but does not have any affect on a non-VSX
CPUs (it does, however add code to the kernel).
If in doubt, say Y here.
config SPE_POSSIBLE
def_bool y
depends on PPC_E500 && !PPC_E500MC
config SPE
bool "SPE Support"
depends on SPE_POSSIBLE
default y
help
This option enables kernel support for the Signal Processing
Extensions (SPE) to the PowerPC processor. The kernel currently
supports saving and restoring SPE registers, and turning on the
'spe enable' bit so user processes can execute SPE instructions.
This option is only useful if you have a processor that supports
SPE (e500, otherwise known as 85xx series), but does not have any
effect on a non-spe cpu (it does, however add code to the kernel).
If in doubt, say Y here.
config PPC_64S_HASH_MMU
bool "Hash MMU Support"
depends on PPC_BOOK3S_64
default y
help
Enable support for the Power ISA Hash style MMU. This is implemented
by all IBM Power and other 64-bit Book3S CPUs before ISA v3.0. The
OpenPOWER ISA does not mandate the hash MMU and some CPUs do not
implement it (e.g., Microwatt).
Note that POWER9 PowerVM platforms only support the hash
MMU. From POWER10 radix is also supported by PowerVM.
If you're unsure, say Y.
config PPC_RADIX_MMU
bool "Radix MMU Support"
depends on PPC_BOOK3S_64
select ARCH_HAS_GIGANTIC_PAGE
default y
help
Enable support for the Power ISA 3.0 Radix style MMU. Currently this
is only implemented by IBM Power9 CPUs, if you don't have one of them
you can probably disable this.
config PPC_RADIX_MMU_DEFAULT
bool "Default to using the Radix MMU when possible" if PPC_64S_HASH_MMU
depends on PPC_BOOK3S_64
depends on PPC_RADIX_MMU
default y
help
When the hardware supports the Radix MMU, default to using it unless
"disable_radix[=yes]" is specified on the kernel command line.
If this option is disabled, the Hash MMU will be used by default,
unless "disable_radix=no" is specified on the kernel command line.
If you're unsure, say Y.
config PPC_KERNEL_PREFIXED
depends on PPC_HAVE_PREFIXED_SUPPORT
depends on CC_HAS_PREFIXED
default n
bool "Build Kernel with Prefixed Instructions"
help
POWER10 and later CPUs support prefixed instructions, 8 byte
instructions that include large immediate, pc relative addressing,
and various floating point, vector, MMA.
This option builds the kernel with prefixed instructions, and
allows a pc relative addressing option to be selected.
Kernel support for prefixed instructions in applications and guests
is not affected by this option.
config PPC_KERNEL_PCREL
depends on PPC_HAVE_PCREL_SUPPORT
depends on PPC_HAVE_PREFIXED_SUPPORT
depends on CC_HAS_PCREL
default n
select PPC_KERNEL_PREFIXED
bool "Build Kernel with PC-Relative addressing model"
help
POWER10 and later CPUs support pc relative addressing. Recent
compilers have support for an ELF ABI extension for a pc relative
ABI.
This option builds the kernel with the pc relative ABI model.
config PPC_KUEP
bool "Kernel Userspace Execution Prevention" if !40x
default y if !40x
help
Enable support for Kernel Userspace Execution Prevention (KUEP)
If you're unsure, say Y.
config PPC_KUAP
bool "Kernel Userspace Access Protection"
default y
help
Enable support for Kernel Userspace Access Protection (KUAP)
If you're unsure, say Y.
config PPC_KUAP_DEBUG
bool "Extra debugging for Kernel Userspace Access Protection"
depends on PPC_KUAP
help
Add extra debugging for Kernel Userspace Access Protection (KUAP)
If you're unsure, say N.
config PPC_PKEY
def_bool y
depends on PPC_BOOK3S_64
depends on PPC_MEM_KEYS || PPC_KUAP || PPC_KUEP
config PPC_MMU_NOHASH
def_bool y
depends on !PPC_BOOK3S
config PPC_HAVE_PMU_SUPPORT
bool
config PPC_HAVE_PREFIXED_SUPPORT
bool
config PPC_HAVE_PCREL_SUPPORT
bool
config PMU_SYSFS
bool "Create PMU SPRs sysfs file"
default n
help
This option enables sysfs file creation for PMU SPRs like MMCR* and PMC*.
config PPC_PERF_CTRS
def_bool y
depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
help
This enables the powerpc-specific perf_event back-end.
config FORCE_SMP
# Allow platforms to force SMP=y by selecting this
bool
select SMP
config SMP
depends on PPC_BOOK3S || PPC_E500 || PPC_47x
select GENERIC_IRQ_MIGRATION
bool "Symmetric multi-processing support" if !FORCE_SMP
help
This enables support for systems with more than one CPU. If you have
a system with only one CPU, say N. If you have a system with more
than one CPU, say Y. Note that the kernel does not currently
support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
since they have inadequate hardware support for multiprocessor
operation.
If you say N here, the kernel will run on single and multiprocessor
machines, but will use only one CPU of a multiprocessor machine. If
you say Y here, the kernel will run on single-processor machines.
On a single-processor machine, the kernel will run faster if you say
N here.
If you don't know what to do here, say N.
config NR_CPUS
int "Maximum number of CPUs (2-8192)" if SMP
range 2 8192 if SMP
default "1" if !SMP
default "32" if PPC64
default "4"
config NOT_COHERENT_CACHE
bool
depends on 4xx || PPC_8xx || PPC_MPC512x || \
GAMECUBE_COMMON || AMIGAONE
select ARCH_HAS_DMA_PREP_COHERENT
select ARCH_HAS_SYNC_DMA_FOR_DEVICE
select ARCH_HAS_SYNC_DMA_FOR_CPU
select DMA_DIRECT_REMAP
default n if PPC_47x
default y
config CHECK_CACHE_COHERENCY
bool
config PPC_DOORBELL
bool
endmenu
config VDSO32
def_bool y
depends on PPC32 || COMPAT
help
This symbol controls whether we build the 32-bit VDSO. We obviously
want to do that if we're building a 32-bit kernel. If we're building
a 64-bit kernel then we only want a 32-bit VDSO if we're also enabling
COMPAT.
choice
prompt "Endianness selection"
default CPU_BIG_ENDIAN
help
This option selects whether a big endian or little endian kernel will
be built.
config CPU_BIG_ENDIAN
bool "Build big endian kernel"
help
Build a big endian kernel.
If unsure, select this option.
config CPU_LITTLE_ENDIAN
bool "Build little endian kernel"
depends on PPC_BOOK3S_64
select PPC64_BOOT_WRAPPER
help
Build a little endian kernel.
Note that if cross compiling a little endian kernel,
CROSS_COMPILE must point to a toolchain capable of targeting
little endian powerpc.
endchoice
config PPC64_ELF_ABI_V1
def_bool PPC64 && (CPU_BIG_ENDIAN && !PPC64_BIG_ENDIAN_ELF_ABI_V2)
config PPC64_ELF_ABI_V2
def_bool PPC64 && !PPC64_ELF_ABI_V1
config PPC64_BOOT_WRAPPER
def_bool n
depends on CPU_LITTLE_ENDIAN