From mboxrd@z Thu Jan 1 00:00:00 1970 From: Will Deacon Subject: Re: [PATCH] iommu/arm-smmu-v3: limit use of 2-level stream tables Date: Thu, 12 Jan 2017 17:20:19 +0000 Message-ID: <20170112172019.GI13843@arm.com> References: <20161220102209.GC10132@arm.com> <1484077633-18376-1-git-send-email-nwatters@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1484077633-18376-1-git-send-email-nwatters-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Nate Watterson Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org On Tue, Jan 10, 2017 at 02:47:13PM -0500, Nate Watterson wrote: > In the current arm-smmu-v3 driver, all smmus that support 2-level > stream tables are being forced to use them. This is suboptimal for > smmus that support fewer stream id bits than would fill in a single > second level table. This patch limits the use of 2-level tables to > smmus that both support the feature and whose first level table can > possibly contain more than a single entry. > > Signed-off-by: Nate Watterson > --- > drivers/iommu/arm-smmu-v3.c | 21 ++++++++++----------- > 1 file changed, 10 insertions(+), 11 deletions(-) Thanks Nate, I'll queue this for 4.11. Sorry for messing you about before. Will