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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR12MB5481.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2f021e9f-d318-4650-89cc-08db3481d86b X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Apr 2023 20:27:28.9083 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: UPT56uiZCzaDHp8ZuYwZ5ZJS05F7jSMtNxKmwlJKBeYt0Ee6ozoUETl2brbCeqTYak635yKdMCrB7Tujp24dPg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6698 Subject: RE: [virtio-comment] [PATCH 00/11] Introduce transitional mmr pci device > From: Stefan Hajnoczi > Sent: Monday, April 3, 2023 3:10 PM > Maybe call it "Memory-mapped Transitional"? That name would be easier to > understand. > Sounds fine to me. =20 > > > Modern devices were added to Linux in 2014 and support SR-IOV. > > > > > Why is it > > > important to support Transitional (which really means Legacy > > > devices, otherwise Modern devices would be sufficient)? > > > > > To support guest VMs which only understand legacy devices and > > unfortunately they are still in much wider use by the users. >=20 > I wonder which guest software without Modern VIRTIO support will still be > supported by the time Transitional MMR software and hardware becomes > available. Are you aiming for particular guest software versions? Transitional MMR hardware is available almost now. Transitional MMR software is also WIP to be available as soon as we ratify = the spec via tvq or via mmr or both. This will be support the guest sw version such as 2.6.32.754 kernel. This publicly archived list offers a means to provide input to the=0D OASIS Virtual I/O Device (VIRTIO) TC.=0D =0D In order to verify user consent to the Feedback License terms and=0D to minimize spam in the list archive, subscription is required=0D before posting.=0D =0D Subscribe: virtio-comment-subscribe@lists.oasis-open.org=0D Unsubscribe: virtio-comment-unsubscribe@lists.oasis-open.org=0D List help: virtio-comment-help@lists.oasis-open.org=0D List archive: https://lists.oasis-open.org/archives/virtio-comment/=0D Feedback License: https://www.oasis-open.org/who/ipr/feedback_license.pdf=0D List Guidelines: https://www.oasis-open.org/policies-guidelines/mailing-lists=0D Committee: https://www.oasis-open.org/committees/virtio/=0D Join OASIS: https://www.oasis-open.org/join/ 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 Received: from ws5-mx01.kavi.com (ws5-mx01.kavi.com [34.193.7.191]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1B98AC76196 for ; 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mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none From: Parav Pandit To: Stefan Hajnoczi CC: "mst@redhat.com" , "virtio-dev@lists.oasis-open.org" , "cohuck@redhat.com" , "virtio-comment@lists.oasis-open.org" , Shahaf Shuler Thread-Topic: [virtio-comment] [PATCH 00/11] Introduce transitional mmr pci device Thread-Index: AQHZY1tF5ObSeHDFk0eWHj0gIzL7fK8ZryCAgABed4D//+uJAIAAFP9w Date: Mon, 3 Apr 2023 20:27:28 +0000 Message-ID: References: <20230330225834.506969-1-parav@nvidia.com> <20230403144523.GC302168@fedora> <46a0db06-f922-2a8a-acf0-cf7e453a2945@nvidia.com> <20230403191014.GA350467@fedora> In-Reply-To: <20230403191014.GA350467@fedora> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: PH0PR12MB5481:EE_|PH8PR12MB6698:EE_ x-ms-office365-filtering-correlation-id: 2f021e9f-d318-4650-89cc-08db3481d86b x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: PH0PR12MB5481.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2f021e9f-d318-4650-89cc-08db3481d86b X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Apr 2023 20:27:28.9083 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: UPT56uiZCzaDHp8ZuYwZ5ZJS05F7jSMtNxKmwlJKBeYt0Ee6ozoUETl2brbCeqTYak635yKdMCrB7Tujp24dPg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6698 Subject: [virtio-dev] RE: [virtio-comment] [PATCH 00/11] Introduce transitional mmr pci device > From: Stefan Hajnoczi > Sent: Monday, April 3, 2023 3:10 PM > Maybe call it "Memory-mapped Transitional"? That name would be easier to > understand. > Sounds fine to me. =20 > > > Modern devices were added to Linux in 2014 and support SR-IOV. > > > > > Why is it > > > important to support Transitional (which really means Legacy > > > devices, otherwise Modern devices would be sufficient)? > > > > > To support guest VMs which only understand legacy devices and > > unfortunately they are still in much wider use by the users. >=20 > I wonder which guest software without Modern VIRTIO support will still be > supported by the time Transitional MMR software and hardware becomes > available. Are you aiming for particular guest software versions? Transitional MMR hardware is available almost now. Transitional MMR software is also WIP to be available as soon as we ratify = the spec via tvq or via mmr or both. This will be support the guest sw version such as 2.6.32.754 kernel. --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org