Re: IOMMUs was Re: Intel vs AMD x86-64

[David S. Miller]

On Fri, 27 Feb 2004 02:28:49 +0100
Andi Kleen <ak@xxxxxxx> wrote:

> Also the other part of the dumbness is that the flush is global, not per mapping. I guess
> you don't have that problem on Sparc64.

Yes, we can per-page flush, but I don't use that feature at all since I do the "flush all when
wrap around IOMMU pte table" thing we're discussing.  In fact there is no "global flush" so
what I have to do is use diagnostic accesses to the IOMMU TLB to kick out the entries one
by one.
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