Re: [RFC PATCH 04/10 v2 ] x86/fpu: eager switch PKRU state
From: Sebastian Andrzej Siewior
Date: Tue Sep 18 2018 - 12:04:27 EST
On 2018-09-18 17:29:52 [+0200], Paolo Bonzini wrote:
> > I don't think it matters what the PKRU state is
> > for kernel threads, since kernel PTEs should not
> > be using protection keys anyway.
>
> What about copy_from/to_user?
This doesn't work for a kernel thread, does it? I mean they share the
init's MM and never do copy_{from|to}_user.
> Paolo
Sebastian