lkml.org 
[lkml]   [2018]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 0/7] IBRS patch series
Date
* Linus Torvalds:

> On Thu, Jan 4, 2018 at 9:56 AM, Tim Chen <tim.c.chen@linux.intel.com> wrote:
>>
>> Speculation on Skylake and later requires these patches ("dynamic IBRS")
>> be used instead of retpoline[1].
>
> Can somebody explain this part?
>
> I was assuming that retpoline would work around this issue on all uarchs.
>
> This seems to say "retpoline does nothing on Skylake+"

Retpoline also looks incompatible with CET, so future Intel CPUs will
eventually need a different approach anyway.

\
 
 \ /
  Last update: 2018-01-05 07:08    [W:0.361 / U:1.744 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site