On Tue, 3 Nov 2020 at 21:58, Borislav Petkov wrote:
>
> On Mon, Nov 02, 2020 at 11:02:10AM +1100, Anand K. Mistry wrote:
> > > I like the idea of passing in the mode you want to check, but it appears
> > > they are never used independently. The ibpb and stibp modes are always
> > > checked togethe
On Tue, Nov 03, 2020 at 11:57:57AM +0100, Borislav Petkov wrote:
> On Mon, Nov 02, 2020 at 11:02:10AM +1100, Anand K. Mistry wrote:
> > > I like the idea of passing in the mode you want to check, but it appears
> > > they are never used independently. The ibpb and stibp modes are always
> > > check
On Mon, Nov 02, 2020 at 11:02:10AM +1100, Anand K. Mistry wrote:
> > I like the idea of passing in the mode you want to check, but it appears
> > they are never used independently. The ibpb and stibp modes are always
> > checked together in one of the if statements below, so you could make this
> >
On Sun, 1 Nov 2020 at 02:05, Tom Lendacky wrote:
>
> On 10/29/20 1:51 AM, Anand K Mistry wrote:
> > On AMD CPUs which have the feature X86_FEATURE_AMD_STIBP_ALWAYS_ON,
> > STIBP is set to on and 'spectre_v2_user_stibp ==
> > SPECTRE_V2_USER_STRICT_PREFERRED'. At the same time, IBPB can be set to
>
On 10/29/20 1:51 AM, Anand K Mistry wrote:
On AMD CPUs which have the feature X86_FEATURE_AMD_STIBP_ALWAYS_ON,
STIBP is set to on and 'spectre_v2_user_stibp ==
SPECTRE_V2_USER_STRICT_PREFERRED'. At the same time, IBPB can be set to
conditional. However, this leads to the case where it's impossibl
On AMD CPUs which have the feature X86_FEATURE_AMD_STIBP_ALWAYS_ON,
STIBP is set to on and 'spectre_v2_user_stibp ==
SPECTRE_V2_USER_STRICT_PREFERRED'. At the same time, IBPB can be set to
conditional. However, this leads to the case where it's impossible to
turn on IBPB for a process because in th
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