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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: DM6PR12MB3753.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 32e96404-4ba5-4bb2-605f-08d948472b49 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Jul 2021 10:47:55.4533 (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: FPjN3SC8pRI9mLhJjI9IMhBNd/sJRAllISr/jbraBEeCGgTa4saM8iE0ri+DQIxY40YcPCmq7/N7h9TgfOd8mQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB5024 Subject: Re: [dpdk-dev] [PATCH v2] net/mlx5: do not allow copy to mark via modify field X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> > -----Original Message----- > From: Alexander Kozyrev <akozyrev@nvidia.com> > Sent: Friday, July 16, 2021 11:43 > To: dev@dpdk.org > Cc: Raslan Darawsheh <rasland@nvidia.com>; Matan Azrad > <matan@nvidia.com>; Slava Ovsiienko <viacheslavo@nvidia.com> > Subject: [PATCH v2] net/mlx5: do not allow copy to mark via modify field >=20 > The Mark action is a two-stage process in the Mellanox driver. > First, a hardware register is filled with the required value, then this v= alue is > registered in the software resource table. >=20 > The MODIFY_FIELD action can instruct a Mellanox NIC to copy some value > from an arbitrary packet header field into the hardware register, associa= ted > with the Mark item. But there is no way NIC can modify the software > resource table as well. >=20 > Due to these driver limitations the copying of arbitrary value to the MAR= K can > not be supported and should be rejected in the MODIFY_FIELD action. >=20 Thank you, Alexander > Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com> Acked-by: Viacheslav Ovsiienko <viacheslavo@nvidia.com>