On Thu, 2014-05-08 at 10:55 -0400, Derek Piper wrote: > > Hi, > > I am unable to get PCI passthrough to work on my Opteron system. I > keep getting an 'adapter reset' within the VM that has the PCI ethernet > assigned to it. It is running 2 x 6 core Opterons on a SuperMicro H8DCL > motherboard that has 2 Intel 82574L network interfaces on it. > > Host's lspci (relevant card): > 02:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network > Connection > 03:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network > Connection > > Both host and VM are running Debian 7 (Wheezy). I have the latest qemu-kvm > from debian backports (1.7.0). Latest is 2.0, also what's the kernel version? > I am running the virtual hosts via virt-manager and assigning the PCI express > ethernet card at 03:00.0. There is no configuration on the host for that > ethernet card, only the first one (02:00.0) is in use. I have enabled the > > options kvm allow_unsafe_assigned_interrupts=1 > > When running the VM with the PCI express adapter assigned to it, and configured > for the network it is connected to, it does not work. I simply get the > 'adapter reset' message again and again. > > The host shows the device being claimed by pci-stub as it gets assigned to the > guest and getting the IRQs. On the guest there is a stack trace and also > adapter resets. Relevant guest dmesg would be helpful. > I am hoping to run a number of different virtual machines off of this host. Due > to network policies in place (no devices in promiscuous mode get routed) I > cannot simply place the host's interface to be shared with different IPs, so > must do one physical ethernet interface each. > > Any help would be greatly appreciated. Does it work using vfio-pci to do the assignment rather than pci-assign? Newer versions of libvirt will use this by default, you may need to add a driver tag with an older version, or upgrade if it's too old for vfio. See xml example here: http://libvirt.org/formatdomain.html#elementsNICSHostdev Thanks, Alex -- 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
