From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Subject: Re: [PATCH v2] PCI: Add ATS-disable quirk for AMD Stoney GPUs To: Bjorn Helgaas , Joerg Roedel Cc: Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Daniel Drake , Alexander Deucher , David Woodhouse , Joerg Roedel References: <1491575538-22694-1-git-send-email-joro@8bytes.org> <20170713025608.GC4486@bhelgaas-glaptop.roam.corp.google.com> From: Samuel Sieb Message-ID: Date: Tue, 29 Aug 2017 13:02:41 -0700 MIME-Version: 1.0 In-Reply-To: <20170713025608.GC4486@bhelgaas-glaptop.roam.corp.google.com> Content-Type: text/plain; charset=utf-8; format=flowed List-ID: On 07/12/2017 07:56 PM, Bjorn Helgaas wrote: > On Fri, Apr 07, 2017 at 04:32:18PM +0200, Joerg Roedel wrote: >> From: Joerg Roedel >> >> ATS is broken on this hardware and causes IOMMU stalls and >> system failure. Disable ATS on these devices to make them >> usable again with IOMMU enabled. >> >> Note that the commit in the Fixes-tag is not buggy, it >> just uncovers the problem in the hardware by increasing >> the ATS-flush rate. >> >> Fixes: b1516a14657a ('iommu/amd: Implement flush queue') >> Signed-off-by: Joerg Roedel > > Applied with Alex's ack to pci/virtualization for v4.14, thanks! Is there any chance of getting this into an earlier kernel? This is a pretty devastating bug for users! I'm currently providing patched kernels, but if they run upgrades and get a new kernel without noticing it, any filesystem they access will get completely mangled.