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d="scan'208";a="336143599" Received: from otc-nc-03.jf.intel.com (HELO otc-nc-03) ([10.54.39.36]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Sep 2020 13:03:35 -0700 Date: Thu, 24 Sep 2020 13:03:34 -0700 From: "Raj, Ashok" To: Rajat Jain Subject: Re: [bugzilla-daemon@bugzilla.kernel.org: [Bug 209149] New: "iommu/vt-d: Enable PCI ACS for platform opt in hint" makes NVMe config space not accessible after S3] Message-ID: <20200924200334.GC86064@otc-nc-03> References: <20200923160327.GA2267374@bjorn-Precision-5520> <20200923161944.GA17764@otc-nc-03> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) Cc: Joerg Roedel , Sagi Grimberg , linux-pci , linux-nvme@lists.infradead.org, Jens Axboe , Lalithambika Krishnakumar , "open list:AMD IOMMU \(AMD-VI\)" , Kai-Heng Feng , Bjorn Helgaas , Keith Busch , Ashok Raj , Mika Westerberg , Christoph Hellwig X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Wed, Sep 23, 2020 at 12:45:11PM -0700, Rajat Jain wrote: > On Wed, Sep 23, 2020 at 9:19 AM Raj, Ashok wrote: > > > > Hi Bjorn > > > > > > On Wed, Sep 23, 2020 at 11:03:27AM -0500, Bjorn Helgaas wrote: > > > [+cc IOMMU and NVMe folks] > > > > > > Sorry, I forgot to forward this to linux-pci when it was first > > > reported. > > > > > > Apparently this happens with v5.9-rc3, and may be related to > > > 50310600ebda ("iommu/vt-d: Enable PCI ACS for platform opt in hint"), > > > which appeared in v5.8-rc3. > > > > > > There are several dmesg logs and proposed patches in the bugzilla, but > > > no analysis yet of what the problem is. From the first dmesg > > > attachment (https://bugzilla.kernel.org/attachment.cgi?id=292327): > > > > We have been investigating this internally as well. It appears maybe the > > specupdate for Cometlake is missing the errata documention. The offsets > > were wrong in some of them, and if its the same issue its likely cause. > > Can you please also confirm if errata applies to Tigerlake ? > We confirmed ICL/TGL isn't affected. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu