mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
f2902a2fb4
This switches to using common code for the DMA allocations, including potential use of the CMA allocator if configured. Switching to the generic code enables DMA allocations from atomic context, which is required by the DMA API documentation, and also adds various other minor features drivers start relying upon. It also makes sure we have on tested code base for all architectures that require uncached pte bits for coherent DMA allocations. Another advantage is that consistent memory allocations now share the general vmalloc pool instead of needing an explicit careout from it. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Christophe Leroy <christophe.leroy@c-s.fr> # tested on 8xx Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190814132230.31874-2-hch@lst.de
517 lines
12 KiB
Text
517 lines
12 KiB
Text
# SPDX-License-Identifier: GPL-2.0
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config PPC64
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bool "64-bit kernel"
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select ZLIB_DEFLATE
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help
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This option selects whether a 32-bit or a 64-bit kernel
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will be built.
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config PPC_BOOK3S_32
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bool
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menu "Processor support"
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choice
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prompt "Processor Type"
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depends on PPC32
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help
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There are five families of 32 bit PowerPC chips supported.
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The most common ones are the desktop and server CPUs (601, 603,
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604, 740, 750, 74xx) CPUs from Freescale and IBM, with their
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embedded 512x/52xx/82xx/83xx/86xx counterparts.
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The other embedded parts, namely 4xx, 8xx, e200 (55xx) and e500
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(85xx) each form a family of their own that is not compatible
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with the others.
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If unsure, select 52xx/6xx/7xx/74xx/82xx/83xx/86xx.
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config PPC_BOOK3S_6xx
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bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx except 601"
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select PPC_BOOK3S_32
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select PPC_FPU
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select PPC_HAVE_PMU_SUPPORT
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select PPC_HAVE_KUEP
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select PPC_HAVE_KUAP
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config PPC_BOOK3S_601
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bool "PowerPC 601"
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select PPC_BOOK3S_32
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select PPC_FPU
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select PPC_HAVE_KUAP
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config PPC_85xx
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bool "Freescale 85xx"
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select E500
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config PPC_8xx
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bool "Freescale 8xx"
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select FSL_SOC
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select SYS_SUPPORTS_HUGETLBFS
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select PPC_HAVE_KUEP
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select PPC_HAVE_KUAP
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select PPC_MM_SLICES if HUGETLB_PAGE
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config 40x
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bool "AMCC 40x"
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select PPC_DCR_NATIVE
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select PPC_UDBG_16550
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select 4xx_SOC
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select HAVE_PCI
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config 44x
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bool "AMCC 44x, 46x or 47x"
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select PPC_DCR_NATIVE
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select PPC_UDBG_16550
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select 4xx_SOC
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select HAVE_PCI
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select PHYS_64BIT
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config E200
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bool "Freescale e200"
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endchoice
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choice
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prompt "Processor Type"
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depends on PPC64
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help
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There are two families of 64 bit PowerPC chips supported.
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The most common ones are the desktop and server CPUs
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(POWER5, 970, POWER5+, POWER6, POWER7, POWER8, POWER9 ...)
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The other are the "embedded" processors compliant with the
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"Book 3E" variant of the architecture
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config PPC_BOOK3S_64
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bool "Server processors"
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select PPC_FPU
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select PPC_HAVE_PMU_SUPPORT
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select SYS_SUPPORTS_HUGETLBFS
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select HAVE_ARCH_TRANSPARENT_HUGEPAGE
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select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
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select ARCH_SUPPORTS_NUMA_BALANCING
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select IRQ_WORK
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select PPC_MM_SLICES
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config PPC_BOOK3E_64
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bool "Embedded processors"
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select PPC_FPU # Make it a choice ?
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select PPC_SMP_MUXED_IPI
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select PPC_DOORBELL
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endchoice
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choice
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prompt "CPU selection"
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default GENERIC_CPU
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help
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This will create a kernel which is optimised for a particular CPU.
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The resulting kernel may not run on other CPUs, so use this with care.
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If unsure, select Generic.
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config GENERIC_CPU
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bool "Generic (POWER4 and above)"
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depends on PPC64 && !CPU_LITTLE_ENDIAN
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config GENERIC_CPU
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bool "Generic (POWER8 and above)"
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depends on PPC64 && CPU_LITTLE_ENDIAN
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select ARCH_HAS_FAST_MULTIPLIER
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config GENERIC_CPU
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bool "Generic 32 bits powerpc"
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depends on PPC32 && !PPC_8xx
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config CELL_CPU
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bool "Cell Broadband Engine"
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depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
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config POWER5_CPU
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bool "POWER5"
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depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
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config POWER6_CPU
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bool "POWER6"
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depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
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config POWER7_CPU
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bool "POWER7"
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depends on PPC_BOOK3S_64
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select ARCH_HAS_FAST_MULTIPLIER
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config POWER8_CPU
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bool "POWER8"
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depends on PPC_BOOK3S_64
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select ARCH_HAS_FAST_MULTIPLIER
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config POWER9_CPU
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bool "POWER9"
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depends on PPC_BOOK3S_64
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select ARCH_HAS_FAST_MULTIPLIER
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config E5500_CPU
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bool "Freescale e5500"
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depends on E500
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config E6500_CPU
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bool "Freescale e6500"
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depends on E500
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config 860_CPU
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bool "8xx family"
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depends on PPC_8xx
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config E300C2_CPU
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bool "e300c2 (832x)"
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depends on PPC_BOOK3S_32
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config E300C3_CPU
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bool "e300c3 (831x)"
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depends on PPC_BOOK3S_32
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config G4_CPU
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bool "G4 (74xx)"
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depends on PPC_BOOK3S_32
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select ALTIVEC
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endchoice
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config TARGET_CPU_BOOL
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bool
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default !GENERIC_CPU
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config TARGET_CPU
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string
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depends on TARGET_CPU_BOOL
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default "cell" if CELL_CPU
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default "power5" if POWER5_CPU
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default "power6" if POWER6_CPU
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default "power7" if POWER7_CPU
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default "power8" if POWER8_CPU
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default "power9" if POWER9_CPU
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default "860" if 860_CPU
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default "e300c2" if E300C2_CPU
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default "e300c3" if E300C3_CPU
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default "G4" if G4_CPU
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config PPC_BOOK3S
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def_bool y
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depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
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config PPC_BOOK3E
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def_bool y
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depends on PPC_BOOK3E_64
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config E500
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select FSL_EMB_PERFMON
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select PPC_FSL_BOOK3E
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bool
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config PPC_E500MC
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bool "e500mc Support"
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select PPC_FPU
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select COMMON_CLK
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depends on E500
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help
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This must be enabled for running on e500mc (and derivatives
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such as e5500/e6500), and must be disabled for running on
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e500v1 or e500v2.
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config PPC_FPU
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bool
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default y if PPC64
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config FSL_EMB_PERFMON
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bool "Freescale Embedded Perfmon"
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depends on E500 || PPC_83xx
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help
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This is the Performance Monitor support found on the e500 core
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and some e300 cores (c3 and c4). Select this only if your
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core supports the Embedded Performance Monitor APU
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config FSL_EMB_PERF_EVENT
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bool
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depends on FSL_EMB_PERFMON && PERF_EVENTS && !PPC_PERF_CTRS
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default y
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config FSL_EMB_PERF_EVENT_E500
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bool
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depends on FSL_EMB_PERF_EVENT && E500
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default y
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config 4xx
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bool
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depends on 40x || 44x
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default y
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config BOOKE
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bool
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depends on E200 || E500 || 44x || PPC_BOOK3E
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default y
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config FSL_BOOKE
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bool
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depends on (E200 || E500) && PPC32
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default y
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# this is for common code between PPC32 & PPC64 FSL BOOKE
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config PPC_FSL_BOOK3E
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bool
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select FSL_EMB_PERFMON
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select PPC_SMP_MUXED_IPI
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select SYS_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
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select PPC_DOORBELL
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default y if FSL_BOOKE
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config PTE_64BIT
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bool
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depends on 44x || E500 || PPC_86xx
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default y if PHYS_64BIT
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config PHYS_64BIT
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bool 'Large physical address support' if E500 || PPC_86xx
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depends on (44x || E500 || PPC_86xx) && !PPC_83xx && !PPC_82xx
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select PHYS_ADDR_T_64BIT
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---help---
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This option enables kernel support for larger than 32-bit physical
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addresses. This feature may not be available on all cores.
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If you have more than 3.5GB of RAM or so, you also need to enable
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SWIOTLB under Kernel Options for this to work. The actual number
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is platform-dependent.
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If in doubt, say N here.
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config ALTIVEC
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bool "AltiVec Support"
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depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
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---help---
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This option enables kernel support for the Altivec extensions to the
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PowerPC processor. The kernel currently supports saving and restoring
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altivec registers, and turning on the 'altivec enable' bit so user
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processes can execute altivec instructions.
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This option is only usefully if you have a processor that supports
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altivec (G4, otherwise known as 74xx series), but does not have
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any affect on a non-altivec cpu (it does, however add code to the
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kernel).
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If in doubt, say Y here.
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config VSX
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bool "VSX Support"
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depends on PPC_BOOK3S_64 && ALTIVEC && PPC_FPU
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---help---
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This option enables kernel support for the Vector Scaler extensions
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to the PowerPC processor. The kernel currently supports saving and
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restoring VSX registers, and turning on the 'VSX enable' bit so user
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processes can execute VSX instructions.
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This option is only useful if you have a processor that supports
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VSX (P7 and above), but does not have any affect on a non-VSX
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CPUs (it does, however add code to the kernel).
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If in doubt, say Y here.
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config SPE_POSSIBLE
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def_bool y
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depends on E200 || (E500 && !PPC_E500MC)
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config SPE
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bool "SPE Support"
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depends on SPE_POSSIBLE
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default y
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---help---
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This option enables kernel support for the Signal Processing
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Extensions (SPE) to the PowerPC processor. The kernel currently
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supports saving and restoring SPE registers, and turning on the
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'spe enable' bit so user processes can execute SPE instructions.
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This option is only useful if you have a processor that supports
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SPE (e500, otherwise known as 85xx series), but does not have any
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effect on a non-spe cpu (it does, however add code to the kernel).
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If in doubt, say Y here.
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config ARCH_ENABLE_SPLIT_PMD_PTLOCK
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def_bool y
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depends on PPC_BOOK3S_64
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config PPC_RADIX_MMU
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bool "Radix MMU Support"
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depends on PPC_BOOK3S_64
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select ARCH_HAS_GIGANTIC_PAGE
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select PPC_HAVE_KUEP
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select PPC_HAVE_KUAP
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default y
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help
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Enable support for the Power ISA 3.0 Radix style MMU. Currently this
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is only implemented by IBM Power9 CPUs, if you don't have one of them
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you can probably disable this.
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config PPC_RADIX_MMU_DEFAULT
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bool "Default to using the Radix MMU when possible"
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depends on PPC_RADIX_MMU
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default y
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help
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When the hardware supports the Radix MMU, default to using it unless
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"disable_radix[=yes]" is specified on the kernel command line.
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If this option is disabled, the Hash MMU will be used by default,
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unless "disable_radix=no" is specified on the kernel command line.
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If you're unsure, say Y.
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config PPC_HAVE_KUEP
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bool
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config PPC_KUEP
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bool "Kernel Userspace Execution Prevention"
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depends on PPC_HAVE_KUEP
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default y
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help
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Enable support for Kernel Userspace Execution Prevention (KUEP)
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If you're unsure, say Y.
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config PPC_HAVE_KUAP
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bool
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config PPC_KUAP
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bool "Kernel Userspace Access Protection"
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depends on PPC_HAVE_KUAP
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default y
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help
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Enable support for Kernel Userspace Access Protection (KUAP)
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If you're unsure, say Y.
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config PPC_KUAP_DEBUG
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bool "Extra debugging for Kernel Userspace Access Protection"
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depends on PPC_HAVE_KUAP && (PPC_RADIX_MMU || PPC_32)
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help
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Add extra debugging for Kernel Userspace Access Protection (KUAP)
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If you're unsure, say N.
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config ARCH_ENABLE_HUGEPAGE_MIGRATION
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def_bool y
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depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
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config PPC_MMU_NOHASH
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def_bool y
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depends on !PPC_BOOK3S
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config PPC_MMU_NOHASH_32
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def_bool y
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depends on PPC_MMU_NOHASH && PPC32
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config PPC_BOOK3E_MMU
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def_bool y
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depends on FSL_BOOKE || PPC_BOOK3E
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config PPC_MM_SLICES
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bool
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config PPC_HAVE_PMU_SUPPORT
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bool
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config PPC_PERF_CTRS
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def_bool y
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depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
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help
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This enables the powerpc-specific perf_event back-end.
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config FORCE_SMP
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# Allow platforms to force SMP=y by selecting this
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bool
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select SMP
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config SMP
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depends on PPC_BOOK3S || PPC_BOOK3E || FSL_BOOKE || PPC_47x
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select GENERIC_IRQ_MIGRATION
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bool "Symmetric multi-processing support" if !FORCE_SMP
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---help---
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This enables support for systems with more than one CPU. If you have
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a system with only one CPU, say N. If you have a system with more
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than one CPU, say Y. Note that the kernel does not currently
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support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
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since they have inadequate hardware support for multiprocessor
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operation.
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If you say N here, the kernel will run on single and multiprocessor
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machines, but will use only one CPU of a multiprocessor machine. If
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you say Y here, the kernel will run on single-processor machines.
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On a single-processor machine, the kernel will run faster if you say
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N here.
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If you don't know what to do here, say N.
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config NR_CPUS
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int "Maximum number of CPUs (2-8192)"
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range 2 8192
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depends on SMP
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default "32" if PPC64
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default "4"
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config NOT_COHERENT_CACHE
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bool
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depends on 4xx || PPC_8xx || E200 || PPC_MPC512x || \
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GAMECUBE_COMMON || AMIGAONE
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select ARCH_HAS_DMA_COHERENT_TO_PFN
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select ARCH_HAS_DMA_PREP_COHERENT
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select ARCH_HAS_SYNC_DMA_FOR_DEVICE
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select ARCH_HAS_SYNC_DMA_FOR_CPU
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select DMA_DIRECT_REMAP
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default n if PPC_47x
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default y
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config CHECK_CACHE_COHERENCY
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bool
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config PPC_DOORBELL
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bool
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endmenu
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config VDSO32
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def_bool y
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depends on PPC32 || CPU_BIG_ENDIAN
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help
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This symbol controls whether we build the 32-bit VDSO. We obviously
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want to do that if we're building a 32-bit kernel. If we're building
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a 64-bit kernel then we only want a 32-bit VDSO if we're building for
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big endian. That is because the only little endian configuration we
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support is ppc64le which is 64-bit only.
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choice
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prompt "Endianness selection"
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default CPU_BIG_ENDIAN
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help
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This option selects whether a big endian or little endian kernel will
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be built.
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config CPU_BIG_ENDIAN
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bool "Build big endian kernel"
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help
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Build a big endian kernel.
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If unsure, select this option.
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config CPU_LITTLE_ENDIAN
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bool "Build little endian kernel"
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depends on PPC_BOOK3S_64
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select PPC64_BOOT_WRAPPER
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help
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Build a little endian kernel.
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Note that if cross compiling a little endian kernel,
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CROSS_COMPILE must point to a toolchain capable of targeting
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little endian powerpc.
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endchoice
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config PPC64_BOOT_WRAPPER
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def_bool n
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depends on CPU_LITTLE_ENDIAN
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