Re: [PATCH 10/11] x86 - add speculation_barrier pattern

2018-07-31 Thread H.J. Lu
On Sat, Jul 28, 2018 at 1:25 AM, Uros Bizjak wrote: > On Fri, Jul 27, 2018 at 11:37 AM, Richard Earnshaw > wrote: >> >> This patch adds a speculation barrier for x86, based on my >> understanding of the required mitigation for that CPU, which is to use >> an lfence instruction. >> >> This patch n

Re: [PATCH 10/11] x86 - add speculation_barrier pattern

2018-07-28 Thread Uros Bizjak
On Fri, Jul 27, 2018 at 11:37 AM, Richard Earnshaw wrote: > > This patch adds a speculation barrier for x86, based on my > understanding of the required mitigation for that CPU, which is to use > an lfence instruction. > > This patch needs some review by an x86 expert and if adjustments are > need

[PATCH 10/11] x86 - add speculation_barrier pattern

2018-07-27 Thread Richard Earnshaw
This patch adds a speculation barrier for x86, based on my understanding of the required mitigation for that CPU, which is to use an lfence instruction. This patch needs some review by an x86 expert and if adjustments are needed, I'd appreciate it if they could be picked up by the port maintainer