> i see an error message has been added, which is great (i killed a > couple hours of $%!@ until i noticed the truncated length was *exactly > 32* bytes; silent truncation), but it would really be great if this > restriction could be lifted, or at least mitigated by expanding the > field some. > > is config space that precious?
Yes. > what constrains it (personal curiosity :-)? Virtio PCI devices map the config space directly onto an ISA IO port range, along with the virtio control structure. On most systems (in particular anything PC based) this is a 16-bit address space. i.e. you have substantually less than 64k of virtio config space for the whole machine, and potentially only a couple of kbytes for a given PCI bus. Paul
