Re: PCI pass-through issue with Xen 4.11 under ubuntu 20.04

[Chris <chris@xxxxxxxxx>]

Hello,

I had the same issue with an onboard LSI HBA (on a supermicro x10sl7-f 
motherboard). The upgrade to Xen 4.12.1 solved it.
I think one of the commits in Xen Git tree related to this issue can be found 
here :
http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=dcc0bf5dec61b3dd1cc00683b5b9b5bfe0a318de



On Sat, 16 May 2020 17:47:41 -0400
"Marc Tousignant" <myrdhn@xxxxxxxxx> wrote:

> Finally, someone else with this issue. 
> I first reported it back in 2017 when I tried to upgrade from 4.5 to 4.7. It 
> also happened in 4.6 and 4.8 during testing, and ended up staying on 4.5 at 
> the time. 
> 
> Back in 2019 I upgraded to 4.10 and ran in to it again when I updated my 
> system fully and could no longer run the older kernel/xen combination. Up 
> till this point I have not seen anyone else report the issue.
> 
>  
> 
> Here is my post from 2019. https://lists.gt.net/xen/users/556111
> 
>  
> 
> My systems have been Gentoo/Funtoo based. I then run a linux based firewall 
> (Sophos UTM) and a Windows server on top. If the Windows server restarts, it 
> loses the connection to the NIC I pass through, if the UTM restarts the NICs 
> still work..
> 
>  
> 
> MarcT
> 
>  
> 
> From: Xen-users <xen-users-bounces@xxxxxxxxxxxxxxxxxxxx> On Behalf Of Oliver 
> Linden
> Sent: Saturday, May 16, 2020 3:16 AM
> To: xen-users@xxxxxxxxxxxxxxxxxxxx
> Subject: PCI pass-through issue with Xen 4.11 under ubuntu 20.04
> 
>  
> 
> Dear all,
> 
> I recently migrated from an long lasting and always upgraded Xen 4.9 / ubuntu 
> 18.04 server to a brand new one with a fresh install of ubuntu 20.04 and 
> their version of Xen 4.11.
> 
> I have two DomU instances using ubuntu 18.04 where I assign PCI device 
> exclusivly to:
> 
> *     2 NICs
> *     1 DVB sattelite card
> 
> Everything is working fine as long as I don't need to "reboot" any of these 
> DomU's. When doing so the PCI devices get lost and are assigned back to the 
> pciback driver in Dom0.
> 
> A shutdown and recreation of the DomU's does solve the issue (workaround) but 
> I would like the DomU's to keep the assignments during reboot as it was with 
> all the previous versions I've used.
> 
> Please let me know which details you need and many thanks in advance.
> 
> Best, Oliver
>