linux-kernel - Re: [PATCH 3/4 v5] iommu/fsl: Add iommu domain attributes required by fsl PAMU driver.

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Message-ID: <1354556172.2960.12@snotra>
Date:	Mon, 3 Dec 2012 11:36:12 -0600
From:	Scott Wood <scottwood@...escale.com>
To:	Joerg Roedel <joro@...tes.org>
CC:	Sethi Varun-B16395 <B16395@...escale.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
	Wood Scott-B07421 <B07421@...escale.com>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	Tabi Timur-B04825 <B04825@...escale.com>
Subject: Re: [PATCH 3/4 v5] iommu/fsl: Add iommu domain attributes required
 by fsl PAMU driver.

On 12/03/2012 11:27:12 AM, Joerg Roedel wrote:
> On Mon, Dec 03, 2012 at 04:57:29PM +0000, Sethi Varun-B16395 wrote:
> >
> >
> > > -----Original Message-----
> > > From: iommu-bounces@...ts.linux-foundation.org [mailto:iommu-
> > > bounces@...ts.linux-foundation.org] On Behalf Of Joerg Roedel
> > > Sent: Sunday, December 02, 2012 7:33 PM
> > > To: Sethi Varun-B16395
> > > Cc: linux-kernel@...r.kernel.org;  
> iommu@...ts.linux-foundation.org; Wood
> > > Scott-B07421; linuxppc-dev@...ts.ozlabs.org; Tabi Timur-B04825
> > > Subject: Re: [PATCH 3/4 v5] iommu/fsl: Add iommu domain attributes
> > > required by fsl PAMU driver.
> > >
> > > Hmm, we need to work out a good abstraction for this.
> > >
> > > On Tue, Nov 20, 2012 at 07:24:56PM +0530, Varun Sethi wrote:
> > > > Added the following domain attributes required by FSL PAMU  
> driver:
> > > > 1. Subwindows field added to the iommu domain geometry  
> attribute.
> > >
> > > Are the Subwindows mapped with full size or do you map only parts  
> of the
> > > subwindows?
> > >
> > [Sethi Varun-B16395] It's possible to map a part of the subwindow  
> i.e.
> > size of the mapping can be less than the sub window size.
> 
> Yes, I know that this is possible. But do you plan to support that or  
> is
> it sufficient when the whole subwindow is mapped?

We do plan to support that.

-Scott
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