[PATCH] [2/2] POWERPC: Lower threshold for DART enablement to 1GB, V2

[Benjamin Herrenschmidt]

> What I had in mind is an interface that given a PCI bridge will tell
> you what's the most restrictive DMA mask for a device on that bridge,
> so that you'll know whether you need to enable the IOMMU for that
> bridge. I'll even settle for a function that tells you what's the most
> restrictive DMA mask in the system, preiod. There's nothing inherently
> arch specific about this.
>
> (and as a side note, the IOMMU we are working on on x86-64 is Calgary,
> which is actually roughly the same chipset used in some PPC
> machines...)

Not sure I ever heard about that... What chipsets ?

Ben.