> > Actually according to qemu's standard, one should use
> > cpu_physical_memory_write/ cpu_physical_memory_read functions.
> > This is true also for reading the ring values.
>
> Yes, and unfortunately, cpu_physical_memory_{read,write} are copy
> interfaces. We really don't want that for high speed I/O.I really don't like doing direct access to guest ram without implementing a proper API for zero-copy/scatter-gather access. There was a list thread about this not so long ago. Paul
