Re: [RFC 5/6] x86, NMI, Add support to notify hardware error with unknown NMI

Ingo Molnar
2010-09-14T12:21:40Z

* Don Zickus <dzickus@redhat.com> wrote:

> > > > At least on PCI-E it may be enough to simply dump all recent AER
> > > > data.
> > >
> > > This assumes AER is supported on the bridge? Which for newer
> > > chips is probably true, but I wasn't sure about older ones.
> >
> > Today's servers should usually have AER at least.
> >
> > For old systems you only can get the few bits in PCI space.
> >
> > > How would I dump AER data from within the kernel?
> >
> > Would need a buffer that is dumped for past events and reading the
> > registers for not yet reported. Right now some infrastructure is
> > needed.
>
> Oh ok.

The proper approach would be not to add hacks to the NMI code but to
implement southbridge drivers - which would also have NMI callbacks.
These are unchartered waters, but variance in that space is reducing
systematically so it would be worth a shot.

Thanks,

Ingo