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pr=C Message-ID: Date: Mon, 19 Oct 2026 20:19:37 -0400 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 5/5] vpci: add SR-IOV support for DomUs To: Mykyta Poturai , "xen-devel@lists.xenproject.org" CC: Stewart Hildebrand , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= References: <8823cd01334978baea19515c35068c789d4568bb.1792072426.git.mykyta_poturai@epam.com> Content-Language: en-US From: Jason Andryuk In-Reply-To: <8823cd01334978baea19515c35068c789d4568bb.1792072426.git.mykyta_poturai@epam.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH2PEPF00048912:EE_|SJ5PPF0AEDE5C3D:EE_ X-MS-Office365-Filtering-Correlation-Id: 36babd3f-4968-4f09-5f24-08df2e3fd482 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|36860700016|23010399003|82310400026|1800799024|10067099003|56012099006|6133799003|22082099003|18002099003|4143699003|11063799006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: O5tJ6EVMLDDL2W9QBJ35bB2RRYIgWvziaRSXYQBsbFeioRO5t3utVvv9QOz3kE7cDG92qsxBsTd5UrMM99kbsa++2MocpOxR+OXpb8IpXuEZfVxjoM6VaqcFOLSOyZCs1gWCFqMTwH+IsgyPONeVEo2TIBt45H+QT90ONOFmFdhMGpk2kmb8SyGOjUbL3XY4dUGdf8hjELBIugpqjSyFTfGdfNq8a5XoLzdyEeWnmpE8h2490WOKPkgr7cqHxn4Ji/aIRnIGZNLgmg1LaHoVi67CnBpuNMCPQ9XhzEM8jbXESEjLG3zWD8HOdmH79LXWPbKPELH3DzS4dX3t3uYox8w04E6JqqIBDjT7Z+JzCvuzryUw3h05X6tGoEA44bjrQYlUCeOP1yKKV+oR1psIUloOfcIsk/FS6h39eNoiwhsoK5jrvXGnrFtghI8wLTGZ X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Oct 2026 00:19:39.1909 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 36babd3f-4968-4f09-5f24-08df2e3fd482 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: PH2PEPF00048912.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ5PPF0AEDE5C3D X-purgate-ID: tlsNG-c201ff/1792455584-71AAF2A1-EFA064A6/0/0 X-purgate-type: clean X-purgate-size: 955 X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 2026-10-15 10:08, Mykyta Poturai wrote: > From: Stewart Hildebrand > > Emulate guest BAR register values based on PF BAR values for VFs. > This allows creating a guest view of the normal BAR registers and emulates > the size and properties as it is done during PCI device enumeration by > the guest. > > Expose VID/DID and class/revision to the guest. > > Note, that VFs ROM BAR is read-only and is all zeros, but VF may provide > access to the PFs ROM via emulation and is not implemented. > > Note this only removes one of the gaps on the way to vPCI DomU support; > VFs are not usable in DomUs until the rest of it is upstream. The DomU > testing behind this patch used out-of-tree vPCI DomU patches. > > Signed-off-by: Stewart Hildebrand > Signed-off-by: Mykyta Poturai Reviewed-by: Jason Andryuk Thanks, Jason