[PATCH v7 05/14] iommufd: Add IOMMUFD_OBJ_VEVENTQ and IOMMUFD_CMD_VEVENTQ_ALLOC

[Jason Gunthorpe]

On Sat, Feb 22, 2025 at 07:54:02AM -0800, Nicolin Chen wrote:
> Introduce a new IOMMUFD_OBJ_VEVENTQ object for vIOMMU Event Queue that
> provides user space (VMM) another FD to read the vIOMMU Events.
> 
> Allow a vIOMMU object to allocate vEVENTQs, with a condition that each
> vIOMMU can only have one single vEVENTQ per type.
> 
> Add iommufd_veventq_alloc() with iommufd_veventq_ops for the new ioctl.
> 
> Reviewed-by: Lu Baolu <baolu.lu at linux.intel.com>
> Reviewed-by: Kevin Tian <kevin.tian at intel.com>
> Signed-off-by: Nicolin Chen <nicolinc at nvidia.com>
> ---
>  drivers/iommu/iommufd/iommufd_private.h |  82 ++++++++++
>  include/linux/iommufd.h                 |   3 +
>  include/uapi/linux/iommufd.h            |  82 ++++++++++
>  drivers/iommu/iommufd/eventq.c          | 209 +++++++++++++++++++++++-
>  drivers/iommu/iommufd/main.c            |   7 +
>  drivers/iommu/iommufd/viommu.c          |   2 +
>  6 files changed, 384 insertions(+), 1 deletion(-)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason