Re: [PATCH v5 03/23] xen/riscv: introduce nospec.h

[Oleksii <oleksii.kurochko@xxxxxxxxx>]

On Tue, 2024-02-27 at 08:38 +0100, Jan Beulich wrote:
> On 26.02.2024 18:38, Oleksii Kurochko wrote:
> > From the unpriviliged doc:
> >   No standard hints are presently defined.
> >   We anticipate standard hints to eventually include memory-system
> > spatial
> >   and temporal locality hints, branch prediction hints, thread-
> > scheduling
> >   hints, security tags, and instrumentation flags for
> > simulation/emulation.
> > 
> > Also, there are no speculation execution barriers.
> > 
> > Therefore, functions evaluate_nospec() and block_speculation()
> > should
> > remain empty until a specific platform has an extension to deal
> > with
> > speculation execution.
> 
> What about array_index_mask_nospec(), though? No custom
> implementation,
> meaning the generic one will be used there? If that's the intention,
> then ...
Yes, the generic one will be used.

~ Oleksii
> 
> > Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
> 
> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
> 
> Jan
>