On Mon, Aug 26, 2024 at 2:16 PM Jason Wang <jasowang@xxxxxxxxxx> wrote: > > On Sat, Aug 24, 2024 at 11:58 AM Christoph Hellwig <hch@xxxxxx> wrote: > > > > Hi all, > > > > we've had a long standing problems where drivers try to hook into the > > DMA_OPS mechanisms to override them for something that is not DMA, or > > to introduce additional dispatching. > > > > Now that we are not using DMA_OPS support for dma-iommu and can build > > kernels without DMA_OPS support on many common setups this becomes even > > more problematic. > > > > This series renames the option to ARCH_DMA_OPS and adds very explicit > > comment to not use it in drivers. The ipu6 and vdpa_sim/user drivers > > that abuse the mechanism are made to depend on the option instead of > > selecting it with a big comment, but I expect this to be fixed rather > > sooner than later (I know the ipu6 maintainers are on it based on a > > previous discussion). > > > > I will try to fix the simulator considering virtio has already had > mapping ops now. Actually I meant, we can extend the virtio_config_ops to allow mapping ops there, then simulator and VDUSE can hook the map ops there. Not sure if Michael is fine with this. Thanks > > Thanks
