From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:36098 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752707AbeDSRVJ (ORCPT ); Thu, 19 Apr 2018 13:21:09 -0400 Date: Thu, 19 Apr 2018 11:21:08 -0600 From: Alex Williamson To: Sinan Kaya Cc: stable@vger.kernel.org Subject: Re: Please apply commit cf0d53ba4947 and 523184972b28 to v4.4.y, v4.9.y, v4.14.y Message-ID: <20180419112108.738eaca6@w520.home> In-Reply-To: <3dc65572-74c2-4f09-1729-8957c5f36ac9@codeaurora.org> References: <3dc65572-74c2-4f09-1729-8957c5f36ac9@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: stable-owner@vger.kernel.org List-ID: On Thu, 19 Apr 2018 13:07:29 -0400 Sinan Kaya wrote: > Hi Greg, > > Upstream commit cf0d53ba4947 ("vfio/pci: Virtualize Maximum Read Request > Size") and commit 523184972b28 ("vfio/pci: Virtualize Maximum Payload Size") > fixes nasty PCIe virtualization issues for platforms that support Maximum > Payload Size bigger than 128. > > Issue shows up when a device is assigned to the guest machine as a passthrough. > Guest machine configures the MPS/MRRS settings to values that are incompatible > with the parent bridge device. > > This causes PCIe transaction timeouts and AER errors to be spilled in the host > kernel. > > Please apply commit cf0d53ba4947 and 523184972b28 to all affected releases to > fix the resulting regression. Acked-by: Alex Williamson