[PATCH v2 3/3] iommu: Allow drivers to say if they use report_iommu_fault()

[Vasant Hegde]

On 11/7/2025 2:04 AM, Jason Gunthorpe wrote:
> report_iommu_fault() is an older API that has been superseded by
> iommu_report_device_fault() which is capable to support PRI.
> 
> Only two external drivers consume this, drivers/remoteproc and
> drivers/gpu/drm/msm. Ideally they would move over to the new APIs, but for
> now protect against accidentally mix and matching the wrong components.
> 
> The iommu drivers support either the old iommu_set_fault_handler() via the
> driver calling report_iommu_fault(), or they are newer server focused
> drivers that call iommu_report_device_fault().
> 
> Include a flag in the iommu_ops if the driver calls report_iommu_fault()
> and block iommu_set_fault_handler() for domain's of iommu drivers that
> can't support it.
> 
> Reviewed-by: Lu Baolu <baolu.lu at linux.intel.com>
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>

Reviewed-by: Vasant Hegde <vasant.hegde at amd.com>

-Vasant