[PATCH v3 11/36] arm64/mm: Map pages for guarded control stack

[Mark Brown]

On Tue, Aug 01, 2023 at 08:02:31PM +0300, Mike Rapoport wrote:
> On Mon, Jul 31, 2023 at 02:43:20PM +0100, Mark Brown wrote:

> >  {
> > -	pteval_t prot = pgprot_val(protection_map[vm_flags &
> > +	pteval_t prot;
> > +
> > +	/*
> > +	 * If this is a GCS then only interpret VM_WRITE.
> > +	 *
> > +	 * TODO: Just make protection_map[] bigger?  Nothing seems
> > +	 * ideal here.
> > +	 */

> I think extending protection_map and updating adjust_protection_map() is
> cleaner and probably faster.

That was my initial thought but then I immediately started second
guessing myself about review comments.  Hopefully Will or Catalin will
weigh in.
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