[XenPPC] Re: [Xen-devel] RFC: PowerPC and VIO

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 30/10/06 8:51 pm, "Jimi Xenidis" <jimix@xxxxxxxxxxxxxx> wrote:

> Immediate questions do come to mind:
>    Why do we return the MFN on a GNTTABOP_map_grant_ref?

It's the *dev* *bus* *addr*. The one you program into your device's DMA
engine. We can't hide that. Yes, in future it will not necessarily be the
MFN (as would be seen on the FSB) as the device bus will be in a different
address-translation space.

 -- Keir

>    Shouldn't that all be hidden?
>    I use it now, but can I depend on it in the future?



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