Re: [PATCH v2 7/7] iommu/s390: flush queued IOVAs on RPCIT out of resource indication

Jason Gunthorpe
2022-12-02T14:43:02Z

On Fri, Dec 02, 2022 at 03:29:50PM +0100, Niklas Schnelle wrote:

> @Robin @Joerg, if you are open to changing .iotlb_sync_map such that it
> can return and error and then failing the mapping operation I think
> this is a great approach. One advantage over the previous approach of
> flushing the queue isthat this should work for the pure IOMMU API too.

I think it is pretty important that the "pure" IOMMU API work with
whatever your solution its, the iommu_domain implementation in a
driver should not be sensitive to if the dma-iommu.c is operating the
domain or something else.

Jason