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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Sep 2021 12:09:14.7657 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f1e8a740-cdf1-4898-4ce1-08d97065faaf X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.34];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT046.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR12MB3144 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org For now only add this definition from the spec. In the future, The drivers should negotiate this feature to optimize the performance. Signed-off-by: Max Gurtovoy --- include/uapi/linux/virtio_config.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/uapi/linux/virtio_config.h b/include/uapi/linux/virtio_config.h index b5eda06f0d57..3fcdc4ab6f19 100644 --- a/include/uapi/linux/virtio_config.h +++ b/include/uapi/linux/virtio_config.h @@ -82,6 +82,12 @@ /* This feature indicates support for the packed virtqueue layout. */ #define VIRTIO_F_RING_PACKED 34 +/* + * This feature indicates that all buffers are used by the device in the same + * order in which they have been made available. + */ +#define VIRTIO_F_IN_ORDER 35 + /* * This feature indicates that memory accesses by the driver and the * device are ordered in a way described by the platform. -- 2.18.1