[vfio-users] kernel v4.2 VM failing with passthrough

[Alex Williamson]

On Thu, 2015-08-13 at 12:22 -0700, globalgorrilla at fastmail.fm wrote:
> Hi,
> 
> VMs are terminating shortly after launch when passing through any Quadro 
> K2200 or R9 260X on 4.2.0-rc6, using 4.1.4 it's working perfectly.
> 
> The VM will go to running and then terminate without ever seeing the 
> OVMF boot screen. I'm not seeing anything in dmesg output.
> 
> It appears specific to the GPUs it seems as the I350-T4 VFs work fine on 
> a separate VM that uses only them in passthrough.
> 
> I'm using libvirt 1.2.1, qemu 2.4, and OVMF.fd from edk2 (5c02fc) Aug 
> 10.
> 
> /etc/default/grub:
> intel_iommu=on iommu=pt iommu=1 pci=assign-busses
> 
> /etc/modprobe.d/vfio-pci.conf
> options vfio-pci 
> ids=1002:ffffffff:ffffffff:ffffffff:00030000:ffff00ff,1002:ffffffff:ffffffff:ffffffff:00040300:ffffffff,10de:ffffffff:ffffffff:ffffffff:00030000:ffff00ff,10de:ffffffff:ffffffff:ffffffff:00040300:ffffffff
> 
> How is 4.2 working for others?
> 
> I saw there was some refactoring in mtrr.c that got fixed in rc6.
> 
> Anything changing that might be related to the issue I'm seeing? IRQ 
> handling?
> 

Do you see anything in the libvirt
log, /var/log/libvirt/qemu/$DOMAIN.log?