Avi Kivity wrote: > On 08/18/2009 03:36 PM, Gregory Haskins wrote: >> Yeah, I agree. I am not advocating we expend energy on this now. But >> my thoughts at the time were that that particular problem can be >> solved at io-setup time with some kind of call to qualify the address. >> >> Iow: a slow path call with the address would return flags on whether >> iowrite() should do a real io, or a IOoHC. >> > > Yes, it could work, though we'd need somewhere to stow this > information. IIRC Arnd suggested a bit from the address itself. > Yeah, exactly. I think MMIO is particularly challenging because I don't know if there are any bits left to use. But like I said, its a problem for another day IMO. -Greg
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