lkml.org 
[lkml]   [2018]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 3/8] kvm: vmx: pass MSR_IA32_SPEC_CTRL and MSR_IA32_PRED_CMD down to the guest
From
Date
On 10/01/2018 15:06, Arjan van de Ven wrote:
> On 1/10/2018 5:20 AM, Paolo Bonzini wrote:
>> * a simple specification that does "IBRS=1 blocks indirect branch
>> prediction altogether" would actually satisfy the specification just as
>> well, and it would be nice to know if that's what the processor actually
>> does.
>
> it doesn't exactly, not for all.
>
> so you really do need to write ibrs again.

Okay, so "always set IBRS=1" does *not* protect against variant 2. Thanks,

Paolo

\
 
 \ /
  Last update: 2018-01-14 23:21    [W:1.071 / U:0.344 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site