[Skiboot] Skiboot recovery of MCEs during MMIO read of SCOMs: 55672ecfa21f
patrick at stwcx.xyz
Tue Sep 22 06:01:19 AEST 2015
On Mon, Sep 21, 2015 at 01:02:48PM +1000, Daniel Axtens wrote:
> This relates to 55672ecfa21f ("powerpc/book3s: Recover from MC in
> sapphire on SCOM read via MMIO.").
> According to that patch, some SCOM reads via MMIO could lead to a
> Machine Check Error in skiboot. That patch provided kernel support for a
> skiboot interface to recover from those MCEs.
> That patch went into the kernel in Dec 2013. However, modern skiboot
> does not expose the device tree property needed to use this mechanism.
> As far as I can tell, nothing ever went into Skiboot for this purpose.
> Is this something we plan to use in the future? Or is it now redundant?
> Skiboot mailing list
> Skiboot at lists.ozlabs.org
XSCOM does not cause a machine check. Centaur Inband SCOM does cause a
machine check. Was this maybe put in place in anticipation of
supporting Inband SCOM? Does skiboot support Inband SCOM now?
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