On Fri, Jan 24, 2025 at 04:30:35PM -0800, Nicolin Chen wrote:
> This is a reverse search v.s. iommufd_viommu_find_dev, as drivers may want
> to convert a struct device pointer (physical) to its virtual device ID for
> an event injection to the user space VM.
>
> Again, this avoids exposing more core structures to the drivers, than the
> iommufd_viommu alone.
>
> Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
> Signed-off-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
> ---
> include/linux/iommufd.h | 9 +++++++++
> drivers/iommu/iommufd/driver.c | 24 ++++++++++++++++++++++++
> 2 files changed, 33 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> + xa_lock(&viommu->vdevs);
> + xa_for_each(&viommu->vdevs, index, vdev) {
> + if (vdev->dev == dev) {
> + *vdev_id = (unsigned long)vdev->id;
I don't think we need this cast
Jason
