Re: [PATCH] x86/pti: Add pti= cmdline option and documentation

[Will Deacon]

Hi Borislav, [+ tglx]

On Tue, Dec 12, 2017 at 02:39:52PM +0100, Borislav Petkov wrote:
> From: Borislav Petkov <bp@xxxxxxx>
> 
> Keep the "nopti" for traditional reasons.
> 
> Requested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Borislav Petkov <bp@xxxxxxx>
> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Cc: Andy Lutomirsky <luto@xxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
> Cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
> Cc: keescook@xxxxxxxxxx
> Cc: hughd@xxxxxxxxxx
> Cc: Brian Gerst <brgerst@xxxxxxxxx>
> Cc: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx>
> Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Cc: Juergen Gross <jgross@xxxxxxxx>
> Cc: David Laight <David.Laight@xxxxxxxxxx>
> Cc: Eduardo Valentin <eduval@xxxxxxxxxx>
> Cc: aliguori@xxxxxxxxxx
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Cc: daniel.gruss@xxxxxxxxxxxxxx
> ---
>  Documentation/admin-guide/kernel-parameters.txt |  6 ++++++
>  arch/x86/mm/pti.c                               | 18 ++++++++++++++++++
>  2 files changed, 24 insertions(+)

On arm64, I've gone for kpti=. I'm happy to change this to align with x86,
but the patches are queued now so I don't want to keep changing it.

Is "pti=" definitely what you're going for on x86?

Will