Date: Tue, 29 Mar 2016 18:20:17 +0100
From: Will Deacon <will.deacon@arm.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: Robin Murphy <robin.murphy@arm.com>, Rob Herring <robh+dt@kernel.org>,
        grant.likely@linaro.org, devicetree@vger.kernel.org, jroedel@suse.de,
        linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
        linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 6/6] iommu/arm-smmu: Make use of phandle iterators in
 device-tree parsing
Message-ID: <20160329172017.GL6745@arm.com>
References: <1458669509-7178-1-git-send-email-joro@8bytes.org>
 <1458669509-7178-7-git-send-email-joro@8bytes.org>
 <56F194BC.3020709@arm.com>
 <20160323115128.GB17838@8bytes.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20160323115128.GB17838@8bytes.org>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 652
Lines: 15

On Wed, Mar 23, 2016 at 12:51:28PM +0100, Joerg Roedel wrote:
> On Tue, Mar 22, 2016 at 06:53:48PM +0000, Robin Murphy wrote:
> > In a stream-matching implementation, a device may quite legitimately
> > own anything up to _all_ of the stream IDs (32768, or 65536 if we
> > ever implement support for the SMMUv2 EXID extension), so this is
> > only a genuine limit for stream indexing (and if anyone ever
> > actually made one of those, I don't think they're running mainline
> > on it).
> 
> Do you mean we might see a lot more than the currently 128 supported
> stream-ids for an smmu?

We might, but this patch is still an improvement for now.

Will