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

Jason Gunthorpe
2025-02-25T15:29:29Z

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@linux.intel.com>
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
> Signed-off-by: Nicolin Chen <nicolinc@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@nvidia.com>

Jason