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=unavailable 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 421F4C282CE for ; Thu, 11 Apr 2019 12:38:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1D5A62073F for ; Thu, 11 Apr 2019 12:38:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726714AbfDKMil (ORCPT ); Thu, 11 Apr 2019 08:38:41 -0400 Received: from mx2.suse.de ([195.135.220.15]:36942 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726096AbfDKMik (ORCPT ); Thu, 11 Apr 2019 08:38:40 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 004CDAC57; Thu, 11 Apr 2019 12:38:38 +0000 (UTC) Date: Thu, 11 Apr 2019 14:38:37 +0200 From: Joerg Roedel To: Nikolai Kostrigin Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH RESEND 1/1] PCI: Add ATS-disable quirk for AMD Radeon R7 GPUs Message-ID: <20190411123837.GF3349@suse.de> References: <20190408103725.30426-1-nickel@altlinux.org> <20190408103725.30426-2-nickel@altlinux.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190408103725.30426-2-nickel@altlinux.org> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 08, 2019 at 01:37:25PM +0300, Nikolai Kostrigin wrote: > ATS is broken on this hardware (at least for Stoney Ridge > based laptop) and causes IOMMU stalls and > system failure. Disable ATS on these devices to make them > usable again with IOMMU enabled > Thanks to Joerg Roedel for help. > > https://bugzilla.kernel.org/show_bug.cgi?id=194521 > > Signed-off-by: Nikolai Kostrigin Acked-by: Joerg Roedel I helped Nikolai with tracking this issue down to ATS handling and suggested adding the quirk.