[PATCH v1 05/16] iommufd/viommu: Add IOMMU_VIOMMU_SET/UNSET_VDEV_ID ioctl

[Jason Gunthorpe]

On Wed, Aug 14, 2024 at 10:09:22AM -0700, Nicolin Chen wrote:

> This helps us to build a device-based virq report function:
> +void iommufd_device_report_virq(struct device *dev, unsigned int data_type,
> +                               void *data_ptr, size_t data_len);
> 
> I built a link from device to viommu reusing Baolu's work:
> struct device -> struct iommu_group -> struct iommu_attach_handle
> -> struct iommufd_attach_handle -> struct iommufd_device (idev)
> -> struct iommufd_vdev_id (idev->vdev_id)

That makes sense, the vdev id would be 1:1 with the struct device, and
the iommufd_device is also supposed to be 1:1 with the struct device.

Jason