From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753613AbdASQNx (ORCPT ); Thu, 19 Jan 2017 11:13:53 -0500 Received: from foss.arm.com ([217.140.101.70]:57228 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753418AbdASQNc (ORCPT ); Thu, 19 Jan 2017 11:13:32 -0500 Date: Thu, 19 Jan 2017 16:13:31 +0000 From: Will Deacon To: Aleksey Makarov Cc: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Robin Murphy , Tomasz Nowicki , Joerg Roedel Subject: Re: [PATCH v4] iommu/arm-smmu: Support for Extended Stream ID (16 bit) Message-ID: <20170119161331.GG31594@arm.com> References: <20170119143653.7576-1-aleksey.makarov@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170119143653.7576-1-aleksey.makarov@linaro.org> 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 On Thu, Jan 19, 2017 at 05:36:36PM +0300, Aleksey Makarov wrote: > It is the time we have the real 16-bit Stream ID user, which is the > ThunderX. Its IO topology uses 1:1 map for Requester ID to Stream ID > translation for each root complex which allows to get full 16-bit > Stream ID. Firmware assigns bus IDs that are greater than 128 (0x80) > to some buses under PEM (external PCIe interface). Eventually SMMU > drops devices on that buses because their Stream ID is out of range: > > pci 0006:90:00.0: stream ID 0x9000 out of range for SMMU (0x7fff) > > To fix above issue enable the Extended Stream ID optional feature > when available. > > Reviewed-by: Tomasz Nowicki > Signed-off-by: Aleksey Makarov > Tested-by: Tomasz Nowicki > --- > v4: > change the commit message: > - explain the reason why the warning happens (Tomasz Nowicki) > - add 'Reviewed-by' and 'Tested-by' from Tomasz Nowicki Thanks, I'll queue this for 4.11. Will