From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752963AbdECJr0 (ORCPT ); Wed, 3 May 2017 05:47:26 -0400 Received: from foss.arm.com ([217.140.101.70]:52402 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752757AbdECJrQ (ORCPT ); Wed, 3 May 2017 05:47:16 -0400 Date: Wed, 3 May 2017 10:47:18 +0100 From: Will Deacon To: Geetha Akula Cc: Mark Rutland , Geetha sowjanya , robin.murphy@arm.com, lorenzo.pieralisi@arm.com, hanjun.guo@linaro.org, sudeep.holla@arm.com, iommu@lists.linux-foundation.org, jcm@redhat.com, Linu Cherian , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, robert.richter@cavium.com, catalin.marinas@arm.com, Geetha , sgoutham@cavium.com, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 2/3] iommu/arm-smmu-v3: Add workaround for Cavium ThunderX2 erratum #74 Message-ID: <20170503094717.GC8233@arm.com> References: <1493293584-20287-1-git-send-email-gakula@caviumnetworks.com> <1493293584-20287-3-git-send-email-gakula@caviumnetworks.com> <20170427164237.GA7114@leverpostej> <20170427170030.GF1890@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Geetha, On Tue, May 02, 2017 at 12:01:15PM +0530, Geetha Akula wrote: > SMMU_IIDR register is broken on T99, that the reason we are using MIDR. Urgh, that's unfortunate. In what way is it broken? > If using MIDR is not accepted, can we enable errata based on SMMU resource size? > some thing like below. No, you need to get your model number added to IORT after all if the IIDR can't uniqely identify the part. Sorry, Will