Re: [PATCH 1/2] arm: msm: Add System MMU support.

From: Roedel, Joerg
Date: Mon Aug 02 2010 - 03:45:26 EST

On Fri, Jul 30, 2010 at 11:15:24PM -0400, Benjamin Herrenschmidt wrote:
> On Thu, 2010-07-29 at 10:26 +0200, Arnd Bergmann wrote:
> > Exactly, thanks for the clarification. I also didn't realize that
> > there
> > is now an include/linux/iommu.h file that only describes the PCI
> > SR-IOV
> > interfaces, unlike the generic IOMMU support that we have in your
> > include/linux/dma-mapping.h file.
> >
> > Maybe we should rename linux/iommu.h to something more specific so we
> > can reduce this confusion in the future.
> Hrm, indeed I just noticed that. Pretty gross... it should definitly be
> renamed, is will caused endless confusion with unrelated iommu.h and
> iommu_* interfaces which represent something different.

The first direction to go should be trying to unify all the different
iommu* interfaces into the iommu-api. The generic api will definitly
need to be extended for that, but since it is an in-kernel interface
thats no problem.

Joerg Roedel - AMD Operating System Research Center

Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach
General Managers: Alberto Bozzo, Andrew Bowd
Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632

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