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

Andi Kleen
2010-09-14T07:48:21Z

On Mon, 13 Sep 2010 17:25:21 -0400
Valdis.Kletnieks@vt.edu wrote:

> > Practically every PC has a small amount of NVRAM.
>
> The big question is how much NVRAM the PC has that is safe for our
> NMI code to hijack/borrow across the reboot without scrogging
> something that the BIOS has squirreled away in there. I recall one
> patch that saved progress indicators during early boot or something -
> but at the expense of stomping on the saved clock settings or
> whatever so you rebooted and then you knew where your previos boot
> wedged, but your system thought it was 1970 again.

It's already implemented for MCE and it works on servers.

-Andi

--
ak@linux.intel.com -- Speaking for myself only.