Hi MST: ref: https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-bus-pci
What: /sys/bus/pci/devices/.../reset Date: July 2009 Contact: Michael S. Tsirkin <m...@redhat.com> Description: Some devices allow an individual function to be reset without affecting other functions in the same device. For devices that have this support, a file named reset will be present in sysfs. Writing 1 to this file will perform reset. Can you please tell me which change in the kernel virtio-pci driver enabled this option to be available in sysfs? The kernel we are running does not seem to have this option for virtio-pci devices. I cannot seem to pin-point the exact change that is needed to get this. thanks ani