arm64: entry: Reword comment about post_ttbr_update_workaround

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We don't fully understand the Cavium ThunderX erratum, but it appears
that mapping the kernel as nG can lead to horrible consequences such as
attempting to execute userspace from kernel context. Since kpti isn't
enabled for these CPUs anyway, simplify the comment justifying the lack
of post_ttbr_update_workaround in the exception trampoline.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Will Deacon 2018-01-29 11:59:58 +00:00 • committed by Catalin Marinas

parent fa0465fc07

commit f167211a93

1 changed files with 3 additions and 10 deletions

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arch/arm64/kernel/entry.S

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