From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 081A3C10F14 for ; Tue, 23 Apr 2019 11:19:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D6468204EC for ; Tue, 23 Apr 2019 11:19:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727578AbfDWLTm (ORCPT ); Tue, 23 Apr 2019 07:19:42 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:54696 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726204AbfDWLTm (ORCPT ); Tue, 23 Apr 2019 07:19:42 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 17351374; Tue, 23 Apr 2019 04:19:42 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9004B3F557; Tue, 23 Apr 2019 04:19:40 -0700 (PDT) Date: Tue, 23 Apr 2019 12:19:38 +0100 From: Will Deacon To: Vivek Gautam Cc: joro@8bytes.org, robin.murphy@arm.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, bjorn.andersson@linaro.org Subject: Re: [PATCH v2 1/1] iommu/arm-smmu: Log CBFRSYNRA register on context fault Message-ID: <20190423111938.GB3439@fuggles.cambridge.arm.com> References: <20190422071036.32671-1-vivek.gautam@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190422071036.32671-1-vivek.gautam@codeaurora.org> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 22, 2019 at 12:40:36PM +0530, Vivek Gautam wrote: > Bits[15:0] in CBFRSYNRA register contain information about > StreamID of the incoming transaction that generated the > fault. Dump CBFRSYNRA register to get this info. > This is specially useful in a distributed SMMU architecture > where multiple masters are connected to the SMMU. > SID information helps to quickly identify the faulting > master device. > > Signed-off-by: Vivek Gautam > Reviewed-by: Bjorn Andersson > --- > > Changes since v1: > - Addressed review comments, given by Bjorn, for nits. Thanks, applied with minor fixup from Robin and Acks. Will