On 15/06/2016 07:04, Steve Novakov wrote: > So I swapped over to ubuntu 16.04 server and I just saw this line in dmesg: > > [0.100541] DMAR-IR: This system BIOS has enabled interrupt remapping on > a chipset that contains an erratum making that feature unstable. To > maintain system stability interrupt remapping is being disabled.please > contact your BIOS vendor for an update. > > This line was actually present while using arch as well I just never > took the time to read past the first line (which just says enabled > interrupt remapping). This seems to be an issue with northbridge > stepping B3, and was apparently fixed in stepping C2 ( I have B3 : ( ). > > I wonder if it's even possible to get this to work with my motherboard > now....**though ESXi can manage just fine...** > > Maybe there's some way to trick linux into just trying to do it. I mean, > it seems to pass devices to pci-stub just fine. Passing devices to pci-stub doesn't require the IOMMU, it's just swapping the driver that binds to the device. I think this is why with VT-d disabled you cannot assign the device to vfio-pci. Does it still freeze with Ubuntu 16.04 (VT-d enabled, vfio_iommu_type1.allow_unsafe_interrupts=1)? Thanks, Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
