Re: [PATCH v6 03/14] iommufd: Abstract an iommufd_eventq from iommufd_fault

[Jason Gunthorpe <jgg@nvidia.com>]

On Fri, Jan 24, 2025 at 04:30:32PM -0800, Nicolin Chen wrote:
> The fault object was designed exclusively for hwpt's IO page faults (PRI).
> But its queue implementation can be reused for other purposes too, such as
> hardware IRQ and event injections to user space.
> 
> Meanwhile, a fault object holds a list of faults. So it's more accurate to
> call it a "fault queue". Combining the reusing idea above, abstract a new
> iommufd_eventq as a common structure embedded into struct iommufd_fault,
> similar to hwpt_paging holding a common hwpt.
> 
> Add a common iommufd_eventq_ops and iommufd_eventq_init to prepare for an
> IOMMUFD_OBJ_VEVENTQ (vIOMMU Event Queue).
> 
> 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 |  28 ++++--
>  drivers/iommu/iommufd/fault.c           | 111 +++++++++++++-----------
>  drivers/iommu/iommufd/hw_pagetable.c    |   6 +-
>  3 files changed, 82 insertions(+), 63 deletions(-)

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

Jason