On Mon, 2011-12-12 at 02:52 +0000, Paul Brook wrote: > I've taken a look at the virtion-mmio spec, and it looks fairly > reasonable. > > The only thing I'd change is the GuestPageSize/QueuePFN mess. Seems like > just > using straight 64-bit addresses would be a better solution. Maybe split into > a high/low pair to keep all registers as 32-bit registers.
This can be done fairly simple by: 1. Bumping Version register content. 2. Adding two registers: QueueAddrLow (0x44) and QueueAddrHigh (0x48). 3. Describing the QueuePFN as obsolete. Than the driver would just use Addr or PFN depending on the device's version. I can do that, but not this year (on holiday from Friday 16th, without any access to Internet whatsoever :-) One think to be decided is in what order the halfs should be filled? Low first, then high? High then low? Does it matter at all? :-) Cheers! Paweł
