Re: [PATCH v4 5/6] mm: Add a NO_INHERIT flag to the PR_SET_MDWE prctl

Andrew Morton
2023-09-22T01:33:31Z

On Mon, 28 Aug 2023 17:08:57 +0200 Florent Revest <revest@chromium.org> wrote:

> This extends the current PR_SET_MDWE prctl arg with a bit to indicate
> that the process doesn't want MDWE protection to propagate to children.
>
> To implement this no-inherit mode, the tag in current->mm->flags must be
> absent from MMF_INIT_MASK. This means that the encoding for "MDWE but
> without inherit" is different in the prctl than in the mm flags. This
> leads to a bit of bit-mangling in the prctl implementation.

Is a manpage update planned?

And did we update the manpage for PR_SET_MDWE?