On Mon, Mar 14, 2011 at 07:15:14PM +0000, Stefan Hajnoczi wrote: > Sounds like a good idea. Feel free to post the patches RFC and I or > someone else can debug and polish them if you don't have time.
By looking at your document and doing what you recommend against I think I got a much simpler solution than what I had before. I didn't know we could actually write to the config space. The vpcu synchronous behaviour is not a problem as it's done seldomly, and we can trivially check against errors by reading the value back. I've just started building this variant, and it seems surprisingly simple.