On 14/12/2015 18:37, Michael S. Tsirkin wrote: > > Can you instead change PCIDeviceClass's pc->is_express to a function > > pointer, and provide a sample implementation pci_is_express_true for the > > devices that set is_express to true? > > I'm not very familiar with vmw code, and I dislike overusing callbacks. > What exactly would this callback do?
It would be exactly the same for virtio. The callback would return true if the device should have a PCIe capability, false if not. The default would be always false. Paolo