Re: [Xen-devel] Device Reset on Nvidia GPUs

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 15 Nov 2013, Gordan Bobic wrote:
> I've noticed that nouveau driver has a sysfs reset implemented
> (although I'm not sure whether it is just a stub or whether it
> does anything).
> 
> Now, I fully understand that this is not actually necessary,
> based purely on empirical evidence:
> 
> My ATI cards reliably crash the host when the domU the are passed
> to is rebooted, and the xen-pciback driver does have the sysfs
> reset implemented for ATI cards.
> 
> OTOH, my (modified) Nvidia cards handle domU reboots perfectly
> and the xen-pciback driver has no sysfs reset implementation
> for those.
> 
> So I'm kind of torn between:
> 1) It's not broken so don't even think about trying to fix it.
> 2) Since FOSS reset implementation seems to exist, it might be
> handy to port it into the xen-pciback feature list (caveat:
> this may impact 1), which would be embarrasing).
> 
> Thoughts?

libxl is capable of using the sysfs reset node, so there shouldn't be
any needed for porting the reset code to pciback

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