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SubjectRe: [PATCH v3 3/6] vbus: add a "vbus-proxy" bus model
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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