[PATCH 3/4] drivers/vfio: New IOCTL command VFIO_EEH_INFO
benh at kernel.crashing.org
Wed May 21 10:23:52 EST 2014
On Tue, 2014-05-20 at 22:39 +1000, Gavin Shan wrote:
> >>Yeah. How about this? :-)
> >>- Move eeh-vfio.c to drivers/vfio/pci/
> >>- From eeh-vfio.c, dereference arch/powerpc/kernel/eeh.c::eeh_ops, which
> >> is arch/powerpc/plaforms/powernv/eeh-powernv.c::powernv_eeh_ops. Call
> >Hrm, I think it'd be nicer to just export individual functions that
> >do thing you want to do from eeh.c.
> Ok. Got it. Thanks for your comments :)
The interesting thing with this approach is that VFIO per-se can work
with EEH RTAS backend too in the host.
IE, with PR KVM for example or with non-KVM uses of VFIO, it would be
possible to use a device in a user process and exploit EEH even when
running under a PAPR hypervisor.
That is, vfio-eeh uses "generic" exported EEH APIs from the EEH core
that will work on both powernv and RTAS backends.
Note to Alex: This definitely kills the notifier idea for now though,
at least as a first class citizen of the design. We can add it as an
optional optimization on top later.
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