Re: [RFC PATCH] asm/generic: introduce if_nospec and nospec_barrier

Jiri Kosina
2018-01-04T01:29:34Z

On Thu, 4 Jan 2018, Alan Cox wrote:

> There are people trying to tune coverity and other tool rules to identify
> cases,

Yeah, but that (and *especially* Coverity) is so inconvenient to be
applied to each and every patch ... that this is not the way to go.

If the CPU speculation can cause these kinds of side-effects, it just must
not happen, full stop. OS trying to work it around is just a whack-a-mole
(which we can apply for old silicon, sure ... but not something that
becomes a new standard) that's never going to lead to any ultimate
solution.

--
Jiri Kosina
SUSE Labs