Re: [Xen-devel] Xen 4.10.x and PCI passthrough

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Mon, Sep 17, 2018 at 12:05:26PM +0200, Andreas Kinzler wrote:
> Hello Roger,
> 
> > > Some weeks ago I tried a quite new version of Xen 4.10.2-pre 
> > > (http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=a645331a9f4190e92ccf41a950bc4692f8904239)
> > > and the PCI card (LSI SAS HBA) using Windows 2012 R2 as a guest.
> > > Everything
> > > works but only to the point where Windows reboots -> then the card is no
> > > longer usable. If you destroy the domain and recreate the card again
> > > Did I miss something simple or should we analyze the problem again
> > > using
> > > similar debug prints as before?
> > Not sure, but it doesn't look to me like this issue is related to the
> > one fixed by the patches mentioned above, I think this is a different
> > issue, and by the looks of it it's a toolstack issue.
> > Can you paste the output of `xl -vvv create <config.cfg>` and the
> > contents of the log that you will find in
> > /var/log/xen/xl-<domain-name>.log after you have attempted a reboot?
> 
> xl-domain.log is attached. From what I can see, the problem is that the card
> is deleted after domid 3 and not added back later. To confirm I ran "xl
> pci-list winsrv" during domid 3 and the card is shown. After Windows reboot
> (domid 4) "xl pci-list winsrv" gives an empty output.

Hello,

I'm not very familiar with the way xl/libxl keeps state between
reboots, I think Wei (now on Cc) was the last one to look into this.
If not I can try to take a look later this week.

Roger.

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