[PATCH v4 04/14] iommufd: Abstract an iommufd_eventq from iommufd_fault

[Baolu Lu]

On 1/4/25 03:43, 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).
> 
> Also, add missing xa_destroy and mutex_destroy in iommufd_fault_destroy().
> 
> Signed-off-by: Nicolin Chen<nicolinc at nvidia.com>
> ---
>   drivers/iommu/iommufd/iommufd_private.h |  52 ++++++---
>   drivers/iommu/iommufd/fault.c           | 142 +++++++++++++++---------
>   drivers/iommu/iommufd/hw_pagetable.c    |   6 +-
>   3 files changed, 130 insertions(+), 70 deletions(-)

Reviewed-by: Lu Baolu <baolu.lu at linux.intel.com>