[vfio-users] amd gpu not being seen

[Ryan Clawfish]

I'm rather happy with 2x 280x's. Hopefully i can use linux virtualization for convinence gaming and reboot into a windows partition when i want insane crossfire graphics. 

To be honest i'm a noob at this and i don't really know what the hell i'm doing. I'm mostly following the arch wiki guide https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF  Because /dev/vfios/17 did not exist I decided to reinstall arch and restart the process from scratch, roughly documenting my steps. Here's what i did. 

installed qemu and rpmextract
extracted the gerd hoffmons eufi and moved it to /usr/share
downloaded libvirt 
enabled libvirt and start it
installed ebtables dnsmasq  bridge-utils and bsd-netcat
added amd_iommu=on to /etc/default/grub, regenerated grub and rebuilt mkinitpcio
added modprobe vfio-pci 
ran mkinitpcio
/etc/libvirt/qemu.conf added root permissions + /dev/vfio/17
created raw file for emulated hdd
installed virt-manager
sudo cp /usr/share/edk2.git/ovmf-x64/OVMF-pure-efi.fd /usr/share/ovmf/OVMF-win10.fd #pointless?
sudo ln -s /usr/share/ovmf/OVMF-win10.fd /usr/share/ovmf/OVMF-win10.fd                      #pointless
added uefi into in the os section of my xml file:
       <loader readonly='yes' type='pflash'>/usr/share/edk2.git/ovmf-x64/OVMF_CODE-pure-efi.fd</loader>
       <nvram template='/usr/share/edk2.git/ovmf-x64/OVMF_VARS-pure-efi.fd'/>
installed windows 10
installed radeon drivers
added target pci (gpu) from virt-manager gui 

When i add the my gpu  the uefi is delayed and booting windows 10 takes forever. There are lots of artifacts and it lags to the point of being completely unusable.  I've tried adding my card via virt-manager gui and via the (depreciated?)<qemu:commandline>. Both have the same effect. 

Here's my xml virt config file http://pastebin.com/sNxvXiQ6



Date: Mon, 28 Sep 2015 09:40:22 -0600
Subject: Re: [vfio-users] amd gpu not being seen
From: alex.l.williamson at gmail.com
To: chimmychainsaw at hotmail.com
CC: vfio-users at redhat.com

On Mon, Sep 28, 2015 at 9:12 AM, Ryan Clawfish <chimmychainsaw at hotmail.com> wrote:









My main issue is i keep getting an error saying "failed to get group 17" and "/dev/vfio/17 does not exist."  If i ls -a my /dev , i see /dev/vfio does not exist. I created it using mkdir, chmod 666 it and added it in /etc/libvirt/qemu.conf but the error persists. 
So all along, you've probably been trying to use legacy KVM device assignment, which led too the Code 43 with the GeForce card.  Too bad, IMHO, the 770 was a better card.  vfio has been the default for PCI hostdev devices since libvirt 1.1.3 and /dev/vfio/ should be present even before vfio is load since kernel v3.14.  Are you even building vfio support into your kernel? 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20150929/eb1c4ff8/attachment.htm>