On 08/06/2017 21:55, Michael S. Tsirkin wrote: > We don't have room anywhere in PCI config space. Laszlo makes argument > why it's safe for this device based on spec but it's anyone's guess > whether current and future software will follow spec. In short, going > anywhere near the emulated device has a potential to break some drivers.
There are no such drivers. The MCH and PCH are only touched by the firmware, not by the OS. There are exceptions such as the Intel graphics driver's incestuous relationship with the PCH, but they are well known. Let's avoid overengineering please. The only sensible (but less sensible) alternative is to just say it's 32MB (or 64, or 128) and cross fingers that we won't need more. Paolo
