> > + /*
> > +* On POWER9 DD2.1 and below, it's possible to get machine
> > +* check where only DSISR bit 33 is set. This will result in
> > +* the MCE handler seeing an unknown event and us crashing.
> > +* Change this to mark as handled on these revisions.
Michael Neuling writes:
> On POWER9 DD2.1 and below, it's possible to get Machine Check
> Exception (MCE) where only DSISR bit 33 is set. This will result in
> the linux MCE handler seeing an unknown event, which triggers linux to
> crash.
Why do we get a machine check with
On Fri, Sep 15, 2017 at 3:25 PM, Michael Neuling wrote:
> On POWER9 DD2.1 and below, it's possible to get Machine Check
> Exception (MCE) where only DSISR bit 33 is set. This will result in
> the linux MCE handler seeing an unknown event, which triggers linux to
> crash.
>
> We
On POWER9 DD2.1 and below, it's possible to get Machine Check
Exception (MCE) where only DSISR bit 33 is set. This will result in
the linux MCE handler seeing an unknown event, which triggers linux to
crash.
We change this by detecting unknown events in the MCE handler and
marking them as handled