[PATCH v1 08/16] iommufd/viommu: Introduce IOMMUFD_OBJ_VCMDQ and its related struct

[Tian, Kevin]

> From: Nicolin Chen <nicolinc at nvidia.com>
> Sent: Friday, April 11, 2025 2:38 PM
> 
> Add a new IOMMUFD_OBJ_VCMDQ with an iommufd_vcmdq structure,
> representing
> a command queue type of physical HW passed to or shared with a user
> space
> VM. 

what is the implication of "or shared with"? Do you intend to support
an usage in which a CMDQ is coordinated by both guest and host (which
sounds insane)?