[PATCH 6/8] x86: Provide API for local kernel TLB flushing

Andy Lutomirski luto at kernel.org
Tue Jun 16 16:59:29 UTC 2020


On Tue, Jun 16, 2020 at 12:49 AM Kees Cook <keescook at chromium.org> wrote:
>
> The seccomp constant action bitmap filter evaluation routine depends
> on being able to quickly clear the PTE "accessed" bit for a temporary
> allocation. Provide access to the existing CPU-local kernel memory TLB
> flushing routines.

Can you write a better justification?  Also, unless I'm just
incompetent this morning, I can't find anyone calling this in the
series.


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