On Sat, Sep 09, 2017 at 05:05:46PM +0200, Greg Kurz wrote: > Before resuming the huge work on PHB hotplug, here are some patches > that maybe worth to apply. > > Patches 1 to 3 are basic improvements.
I've applied these to ppc-for-2.11.
> Patch 4 and 5 may be a bit controversial. Everywhere in the spapr
> code where we build an FDT portion, libfdt failures cause QEMU to
> exit, even on hotplug paths. Only spapr_pci doesn't do that and
> propagates the error instead. My understanding is that a failure
> when building the FDT is likely to happen because of a bug in QEMU.
Still looking at these.
>
> Hence the choice to convert spapr_pci to do like the others. We may
> even consider changing _FDT() to abort() instead of exit().
>
> Alternatively, if libfdt failures shouldn't be necessarily fatal,
> especially on post-realize paths, then we should probably introduce
> an _FDT_ERR() helper to propagate errors. And use it in may places
> where we currently terminate QEMU: memory hotplug, CPU hotplug, CAS,
> machine reset...
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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