Re: [PATCH 2/2] powerpc: Handle MCE on POWER9 with only DSISR bit 33 set

2017-09-20 Thread Michael Neuling
> > +   /* > > +* 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.

Re: [PATCH 2/2] powerpc: Handle MCE on POWER9 with only DSISR bit 33 set

2017-09-20 Thread Michael Ellerman
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

Re: [PATCH 2/2] powerpc: Handle MCE on POWER9 with only DSISR bit 33 set

2017-09-19 Thread Balbir Singh
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

[PATCH 2/2] powerpc: Handle MCE on POWER9 with only DSISR bit 33 set

2017-09-14 Thread Michael Neuling
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