Avi Kivity wrote: > Gregory Haskins wrote: >> Avi Kivity wrote: >> >>> Gregory Haskins wrote: >>> >>>> I guess technically mmio can just be a simple access of the page which >>>> would be problematic to trap locally without a PF. However it seems >>>> that most mmio always passes through a ioread()/iowrite() call so this >>>> is perhaps the hook point. If we set the stake in the ground that >>>> mmios >>>> that go through some other mechanism like PFs can just hit the "slow >>>> path" are an acceptable casualty, I think we can make that work. >>>> >>> That's my thinking exactly. >>> >> >> Cool, I will code this up and submit it. While Im at it, Ill run it >> through the "nullio" ringer, too. ;) It would be cool to see the >> pv-mmio hit that 2.07us number. I can't think of any reason why this >> will not be the case. >> > > Don't - it's broken. It will also catch device assignment mmio and > hypercall them. > Ah. Crap. Would you be conducive if I continue along with the dynhc() approach then? -Greg
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