On Thu, Aug 7, 2025 at 7:58 PM Eugenio Pérez <eperezma@xxxxxxxxxx> wrote:
>
> This message lets the kernel notify userspace VDUSE backends about
> updated IOTLB mappings for a specific ASID.
>
> Signed-off-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
I guess this could be squashed to the previous patch for logic completeness.
Thanks
> ---
> drivers/vdpa/vdpa_user/vduse_dev.c | 14 ++++++++++----
> include/uapi/linux/vduse.h | 7 +++++++
> 2 files changed, 17 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
> index 145147c49930..ac7897068222 100644
> --- a/drivers/vdpa/vdpa_user/vduse_dev.c
> +++ b/drivers/vdpa/vdpa_user/vduse_dev.c
> @@ -326,7 +326,7 @@ static int vduse_dev_set_status(struct vduse_dev *dev, u8 status)
> return vduse_dev_msg_sync(dev, &msg);
> }
>
> -static int vduse_dev_update_iotlb(struct vduse_dev *dev,
> +static int vduse_dev_update_iotlb(struct vduse_dev *dev, u32 asid,
> u64 start, u64 last)
> {
> struct vduse_dev_msg msg = { 0 };
> @@ -335,8 +335,14 @@ static int vduse_dev_update_iotlb(struct vduse_dev *dev,
> return -EINVAL;
>
> msg.req.type = VDUSE_UPDATE_IOTLB;
> - msg.req.iova.start = start;
> - msg.req.iova.last = last;
> + if (dev->api_version < VDUSE_API_VERSION_1) {
> + msg.req.iova.start = start;
> + msg.req.iova.last = last;
> + } else {
> + msg.req.iova_v2.start = start;
> + msg.req.iova_v2.last = last;
> + msg.req.iova_v2.asid = asid;
> + }
>
> return vduse_dev_msg_sync(dev, &msg);
> }
> @@ -882,7 +888,7 @@ static int vduse_vdpa_set_map(struct vdpa_device *vdpa,
> if (ret)
> return ret;
>
> - ret = vduse_dev_update_iotlb(dev, 0ULL, ULLONG_MAX);
> + ret = vduse_dev_update_iotlb(dev, asid, 0ULL, ULLONG_MAX);
> if (ret) {
> vduse_domain_clear_map(dev->domain[asid], iotlb);
> return ret;
> diff --git a/include/uapi/linux/vduse.h b/include/uapi/linux/vduse.h
> index d300fd5f867f..a5f7a5edb8e0 100644
> --- a/include/uapi/linux/vduse.h
> +++ b/include/uapi/linux/vduse.h
> @@ -349,6 +349,12 @@ struct vduse_iova_range {
> __u64 last;
> };
>
> +struct vduse_iova_range_v2 {
> + __u64 start;
> + __u64 last;
> + __u32 asid;
> +};
> +
> /**
> * struct vduse_dev_request - control request
> * @type: request type
> @@ -369,6 +375,7 @@ struct vduse_dev_request {
> struct vduse_vq_state vq_state;
> struct vduse_dev_status s;
> struct vduse_iova_range iova;
> + struct vduse_iova_range_v2 iova_v2;
> struct vduse_vq_group vq_group; /* Only if vduse api version >= 1 */
> /* Only if vduse api version >= 1 */
> struct vduse_vq_group_asid vq_group_asid;
> --
> 2.50.1
>
