* lidong chen ([email protected]) wrote: > guest os could not access the vf assigned ，and print this error message . > PCI: device 0000:00:06.0 has unknown header type 7f, ignoring. > PCI: device 0000:00:07.0 has unknown header type 7f, ignoring. > PCI: device 0000:00:08.0 has unknown header type 7f, ignoring. > > the reason is the config file /sys/bus/pci/devices/xx/config of pci > device could not access correctly after guestos start, > the content qemu-kvm read from /sys/bus/pci/devices/xx/config is all FF.
This is mostly likely a combination of two bugs, both have since been fixed (starting in v0.8.3). What version of libvirt are you using? One is the 82599 VF has an erratum that it does not show that it supports Function Level Reset (FLR -- SR-IOV VFs are required to support FLR). The second is libvirt had buggy handling of device reset for devices that don't support FLR. IIRC, what you are seeing is the result of a secondary bus reset resetting all devices on that bus (including the PF). Try upgrading libvirt. thanks, -chris -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
