arm64: errata: Don't enable workarounds for "rare" errata by default

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Arm classifies some of its CPU errata as "rare", indicating that the
hardware error is unlikely to occur in practice. Given that the cost of
errata workarounds can often be significant in terms of power and
performance, don't enable workarounds for "rare" errata by default and
update our documentation to reflect that.

Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20240209183916.25860-1-will@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Will Deacon 2024-02-09 18:39:16 +00:00 • committed by Catalin Marinas

parent 54be6c6c5a

commit 8c10cc104b

2 changed files with 14 additions and 16 deletions

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5

Documentation/arch/arm64/silicon-errata.rst

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25

arch/arm64/Kconfig

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