powerpc: Define config option for processors with broadcast TLBIE

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Power ISA v3.0 (and later) implementations in the Linux Compliancy
Subset and lower are not required to implement broadcast TLBIE, and in
fact Microwatt doesn't.

To avoid the need to specify "disable_tlbie" on the kernel command
line on SMP Microwatt systems, this defines a config option that
asserts that the platform implements broadcast TLBIE.  This option is
selected by the pseries and powernv platforms, but not by microwatt.
Note that this option is only relevant when the radix MMU is being
used, so platforms without a radix MMU don't need it.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/Z5xtvdozEfEmRyeI@thinks.paulus.ozlabs.org

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Paul Mackerras 2025-01-31 17:29:17 +11:00 • committed by Madhavan Srinivasan

parent 2b0a438d53

commit 3d45a3d0d2

4 changed files with 17 additions and 2 deletions

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4

arch/powerpc/mm/book3s64/pgtable.c

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13

arch/powerpc/platforms/Kconfig.cputype

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1

arch/powerpc/platforms/powernv/Kconfig

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1

arch/powerpc/platforms/pseries/Kconfig

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