mirror of
https://github.com/torvalds/linux
synced 2024-07-05 18:00:39 +00:00
4ad0a4c234
- Add HOTPLUG_SMT support (/sys/devices/system/cpu/smt) and honour the configured SMT state when hotplugging CPUs into the system. - Combine final TLB flush and lazy TLB mm shootdown IPIs when using the Radix MMU to avoid a broadcast TLBIE flush on exit. - Drop the exclusion between ptrace/perf watchpoints, and drop the now unused associated arch hooks. - Add support for the "nohlt" command line option to disable CPU idle. - Add support for -fpatchable-function-entry for ftrace, with GCC >= 13.1. - Rework memory block size determination, and support 256MB size on systems with GPUs that have hotpluggable memory. - Various other small features and fixes. Thanks to: Andrew Donnellan, Aneesh Kumar K.V, Arnd Bergmann, Athira Rajeev, Benjamin Gray, Christophe Leroy, Frederic Barrat, Gautam Menghani, Geoff Levand, Hari Bathini, Immad Mir, Jialin Zhang, Joel Stanley, Jordan Niethe, Justin Stitt, Kajol Jain, Kees Cook, Krzysztof Kozlowski, Laurent Dufour, Liang He, Linus Walleij, Mahesh Salgaonkar, Masahiro Yamada, Michal Suchanek, Nageswara R Sastry, Nathan Chancellor, Nathan Lynch, Naveen N Rao, Nicholas Piggin, Nick Desaulniers, Omar Sandoval, Randy Dunlap, Reza Arbab, Rob Herring, Russell Currey, Sourabh Jain, Thomas Gleixner, Trevor Woerner, Uwe Kleine-König, Vaibhav Jain, Xiongfeng Wang, Yuan Tan, Zhang Rui, Zheng Zengkai. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAmTwgbwTHG1wZUBlbGxl cm1hbi5pZC5hdQAKCRBR6+o8yOGlgFmpD/432vipeoqvkAYsyK0xi/Y3GcY0wcyd WJApLXXadEbtKQrgXQ6sowWqalg5thYnQCRarg/tXKK/po3KfgwkPjGDpOL+cIdr 12QVN2XJm9VmJ1wYJxzk+yXx4F43AdmMdr94qWAGufbTHezwb4UpzVR1NxtFrOE/ X5TNsC2+2mdZY/ZaNHS5vsTIFv3EhQfqgjZPlIAdLn6CGc8xWT514Q/uHA8+ytM/ HL7Hqs33DoPSvgTa5TT/2E0d0k5nO3P5KObzAjpYlireTPaBi51mpKGewcrtm0o2 v3cBlbfx3C7pe9ZhKBK9BH8cjynfiqsVZ9/lCw/7eBNdm9tHuzG0jeS7Db9tCZXS fM7G2R7SoIusPTqxlBmkU5DpYslwrHiVgCyy3ijxkoA/fakVwh/GgTcMsRt73IY6 n6DsUvWwuYHCIeIiHmHQJqCqCRtV+aMzU3AbbBHOjtdIanhlW16M686dEsgCirh7 akRVRD5VqKaqXs34PpkRL89Xv3wZRjl6XZ3hZFfCjSYXfpXDXhgSToIskpHYhKL8 gpY7WtG9YQP05Xz5HRCx6EluaZVeKe0lZi6fezX7Mi9AygJQO8FfXqP1mHBlEq40 ThWtvL9D89RV6lADqqFN20XepgvKNOyAXcE4szvsnIZYUSPmZQZSPxx+DHtROaLP jX3ifxtxJp92pQ== =5g7K -----END PGP SIGNATURE----- Merge tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: - Add HOTPLUG_SMT support (/sys/devices/system/cpu/smt) and honour the configured SMT state when hotplugging CPUs into the system - Combine final TLB flush and lazy TLB mm shootdown IPIs when using the Radix MMU to avoid a broadcast TLBIE flush on exit - Drop the exclusion between ptrace/perf watchpoints, and drop the now unused associated arch hooks - Add support for the "nohlt" command line option to disable CPU idle - Add support for -fpatchable-function-entry for ftrace, with GCC >= 13.1 - Rework memory block size determination, and support 256MB size on systems with GPUs that have hotpluggable memory - Various other small features and fixes Thanks to Andrew Donnellan, Aneesh Kumar K.V, Arnd Bergmann, Athira Rajeev, Benjamin Gray, Christophe Leroy, Frederic Barrat, Gautam Menghani, Geoff Levand, Hari Bathini, Immad Mir, Jialin Zhang, Joel Stanley, Jordan Niethe, Justin Stitt, Kajol Jain, Kees Cook, Krzysztof Kozlowski, Laurent Dufour, Liang He, Linus Walleij, Mahesh Salgaonkar, Masahiro Yamada, Michal Suchanek, Nageswara R Sastry, Nathan Chancellor, Nathan Lynch, Naveen N Rao, Nicholas Piggin, Nick Desaulniers, Omar Sandoval, Randy Dunlap, Reza Arbab, Rob Herring, Russell Currey, Sourabh Jain, Thomas Gleixner, Trevor Woerner, Uwe Kleine-König, Vaibhav Jain, Xiongfeng Wang, Yuan Tan, Zhang Rui, and Zheng Zengkai. * tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (135 commits) macintosh/ams: linux/platform_device.h is needed powerpc/xmon: Reapply "Relax frame size for clang" powerpc/mm/book3s64: Use 256M as the upper limit with coherent device memory attached powerpc/mm/book3s64: Fix build error with SPARSEMEM disabled powerpc/iommu: Fix notifiers being shared by PCI and VIO buses powerpc/mpc5xxx: Add missing fwnode_handle_put() powerpc/config: Disable SLAB_DEBUG_ON in skiroot powerpc/pseries: Remove unused hcall tracing instruction powerpc/pseries: Fix hcall tracepoints with JUMP_LABEL=n powerpc: dts: add missing space before { powerpc/eeh: Use pci_dev_id() to simplify the code powerpc/64s: Move CPU -mtune options into Kconfig powerpc/powermac: Fix unused function warning powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT powerpc: Don't include lppaca.h in paca.h powerpc/pseries: Move hcall_vphn() prototype into vphn.h powerpc/pseries: Move VPHN constants into vphn.h cxl: Drop unused detach_spa() powerpc: Drop zalloc_maybe_bootmem() powerpc/powernv: Use struct opal_prd_msg in more places ...
647 lines
16 KiB
Plaintext
647 lines
16 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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config PPC32
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bool
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default y if !PPC64
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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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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 (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 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_32
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bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
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imply PPC_FPU
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select PPC_HAVE_PMU_SUPPORT
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select HAVE_ARCH_VMAP_STACK
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config PPC_85xx
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bool "Freescale 85xx"
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select PPC_E500
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config PPC_8xx
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bool "Freescale 8xx"
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select ARCH_SUPPORTS_HUGETLBFS
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select FSL_SOC
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select PPC_KUEP
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select HAVE_ARCH_VMAP_STACK
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select HUGETLBFS
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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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select PPC_KUEP if PPC_KUAP
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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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select PPC_KUEP
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endchoice
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config PPC_BOOK3S_603
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bool "Support for 603 SW loaded TLB"
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depends on PPC_BOOK3S_32
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default y
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help
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Provide support for processors based on the 603 cores. Those
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processors don't have a HASH MMU and provide SW TLB loading.
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config PPC_BOOK3S_604
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bool "Support for 604+ HASH MMU" if PPC_BOOK3S_603
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depends on PPC_BOOK3S_32
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default y
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help
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Provide support for processors not based on the 603 cores.
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Those processors have a HASH MMU.
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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 HAVE_ARCH_TRANSPARENT_HUGEPAGE
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select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
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select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
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select ARCH_ENABLE_SPLIT_PMD_PTLOCK
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select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
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select ARCH_SUPPORTS_HUGETLBFS
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select ARCH_SUPPORTS_NUMA_BALANCING
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select HAVE_MOVE_PMD
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select HAVE_MOVE_PUD
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select IRQ_WORK
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select PPC_64S_HASH_MMU if !PPC_RADIX_MMU
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select KASAN_VMALLOC if KASAN
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config PPC_BOOK3E_64
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bool "Embedded processors"
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select PPC_E500
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select PPC_E500MC
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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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select ZONE_DMA
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endchoice
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choice
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prompt "CPU selection"
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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 POWERPC64_CPU
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bool "Generic (POWER5 and PowerPC 970 and above)"
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depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
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select PPC_64S_HASH_MMU
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config POWERPC64_CPU
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bool "Generic (POWER8 and above)"
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depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
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select ARCH_HAS_FAST_MULTIPLIER
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select PPC_64S_HASH_MMU
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select PPC_HAS_LBARX_LHARX
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config POWERPC_CPU
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bool "Generic 32 bits powerpc"
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depends on PPC_BOOK3S_32
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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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depends on !CC_IS_CLANG
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select PPC_64S_HASH_MMU
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config PPC_970_CPU
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bool "PowerPC 970 (including PowerPC G5)"
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depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
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select PPC_64S_HASH_MMU
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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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select PPC_64S_HASH_MMU
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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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select PPC_64S_HASH_MMU
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select PPC_HAS_LBARX_LHARX
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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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select PPC_64S_HASH_MMU
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select PPC_HAS_LBARX_LHARX
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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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select PPC_HAS_LBARX_LHARX
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config POWER10_CPU
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bool "POWER10"
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depends on PPC_BOOK3S_64
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select ARCH_HAS_FAST_MULTIPLIER
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select PPC_HAVE_PREFIXED_SUPPORT
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select PPC_HAVE_PCREL_SUPPORT
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config E5500_CPU
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bool "Freescale e5500"
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depends on PPC64 && PPC_E500
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config E6500_CPU
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bool "Freescale e6500"
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depends on PPC64 && PPC_E500
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depends on !CC_IS_CLANG
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select PPC_HAS_LBARX_LHARX
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config 405_CPU
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bool "40x family"
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depends on 40x
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depends on !CC_IS_CLANG
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config 440_CPU
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bool "440 (44x family)"
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depends on 44x
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config 464_CPU
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bool "464 (44x family)"
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depends on 44x
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depends on !CC_IS_CLANG
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config 476_CPU
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bool "476 (47x family)"
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depends on PPC_47x
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depends on !CC_IS_CLANG
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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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depends on !CC_IS_CLANG
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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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depends on !CC_IS_CLANG
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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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depends on !CC_IS_CLANG
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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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config E500_CPU
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bool "e500 (8540)"
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depends on PPC_85xx && !PPC_E500MC
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config E500MC_CPU
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bool "e500mc"
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depends on PPC_85xx && PPC_E500MC
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config TOOLCHAIN_DEFAULT_CPU
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bool "Rely on the toolchain's implicit default CPU"
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endchoice
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config TARGET_CPU_BOOL
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bool
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default !TOOLCHAIN_DEFAULT_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 "970" if PPC_970_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 "power10" if POWER10_CPU
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default "e5500" if E5500_CPU
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default "e6500" if E6500_CPU
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default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN
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default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN
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default "405" if 405_CPU
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default "440" if 440_CPU
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default "464" if 464_CPU
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default "476" if 476_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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default "8540" if E500_CPU
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default "e500mc" if E500MC_CPU
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default "powerpc" if POWERPC_CPU
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config TUNE_CPU
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string
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depends on POWERPC64_CPU
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default "-mtune=power10" if $(cc-option,-mtune=power10)
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default "-mtune=power9" if $(cc-option,-mtune=power9)
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default "-mtune=power8" if $(cc-option,-mtune=power8)
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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_E500
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select FSL_EMB_PERFMON
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bool
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select ARCH_SUPPORTS_HUGETLBFS if PHYS_64BIT || PPC64
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select PPC_SMP_MUXED_IPI
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select PPC_DOORBELL
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select PPC_KUEP
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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 PPC_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_REGS
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bool
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config PPC_FPU
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bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x
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default y if PPC64
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select PPC_FPU_REGS
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help
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This must be enabled to support the Floating Point Unit
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Most 6xx have an FPU but e300c2 core (mpc832x) don't have
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an FPU, so when building an embedded kernel for that target
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you can disable FPU support.
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If unsure say Y.
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config FSL_EMB_PERFMON
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bool "Freescale Embedded Perfmon"
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depends on PPC_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 && PPC_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 PPC_E500 || 44x
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default y
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config BOOKE_OR_40x
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bool
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depends on BOOKE || 40x
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default y
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config PTE_64BIT
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bool
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depends on 44x || PPC_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 PPC_E500 || PPC_86xx
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depends on (44x || PPC_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 || (PPC_E500MC && PPC64 && !E5500_CPU)
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select PPC_FPU
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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
|
|
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
|