[vfio-users] No reset on GT730

[Gerhard de Clercq]

Ok thanks, I can't find a HD8570 but it seems like the R7 240 is a rebrand of it. What are the odds that it will also work?

________________________________
From: Alex Williamson <alex.l.williamson at gmail.com>
Sent: 07 July 2016 02:16 PM
To: Gerhard de Clercq
Cc: Nicolas Roy-Renaud; vfio-users at redhat.com
Subject: Re: [vfio-users] No reset on GT730

On Thu, Jul 7, 2016 at 8:05 AM, Gerhard de Clercq <gerharddeclercq at outlook.com<mailto:gerharddeclercq at outlook.com>> wrote:


I actually used that tutorial to set it up and I can't find anything that I might have missed. I have unfortunately returned the card by now while I still had time so I can't test it further. It would be really nice if we could somehow force vfio to do a reset so that we would know if it is even possible for a card. Is there any cheap (perferably AMD) card that I can get which is known to downright work properly with vfio reset?

If you're looking for cheap and very low-end, try an HD8570.  I generally don't recommend AMD due to the myriad of issues though, however mine works great. I would still suspect there's really no reset problem on a GT730 and the issue had something to do with the configuration.  vfio is a generic userspace driver, so it's not too difficult to write code that just does enough initialization to do a bus reset, see for example this crufty unit test https://github.com/awilliam/tests/blob/master/vfio-pci-hot-reset.c
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