On Wed, May 25, 2011 at 02:05:38PM +0800, Huang Ying wrote: > In APEI firmware first mode, hardware error is reported by hardware to > firmware firstly, then firmware reports the error to Linux in a GHES > error record via POLL/SCI/IRQ/NMI etc. > > This may result in some issues if OS has no full APEI support. So > some firmware implementation will work in a back-compatible mode by > default. Where firmware will only notify OS in old-fashion, without > GHES record. For example, for a fatal hardware error, only NMI is > signaled, no GHES record. > > To gain full APEI power on these machines, a special APEI _OSC needs > to be evaluated to tell firmware that Linux has full APEI support. > This patch add the APEI _OSC support. Using an Intel box I have over at RedHat, I was able to use this patch to get error injection (EINJ) to provide me a GHES record. Prior to this patch I would just get unknown NMIs. Talking with Matthew Garret, I guess it seems that uuids like this are typical for ACPI. I can't speak for all the ACPI parts, but the patch looks simple and corret from my perspective. Reviewed-and-Tested-by: Don Zickus <dzickus@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
