On 31.05.2025 14:54, Stewart Hildebrand wrote: > Currently, Xen vPCI refuses BAR writes if the BAR is mapped in p2m. If > firmware initializes a 32-bit BAR to a bad address, Linux may try to > write a new address to the BAR without disabling memory decoding. Since > Xen refuses such writes, the BAR (and thus PCI device) will be > non-functional.
Doing this for 32-bit BARs only, with not even an outline what to do about the same issue with 64-bit ones, seems like it won't buy us very much. Jan
