On Mon, Jul 24, 2023 at 04:03:51AM -0700, Yi Liu wrote:
> @@ -350,6 +354,10 @@ struct iommu_ops {
> * @iotlb_sync_map: Sync mappings created recently using @map to the hardware
> * @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
> * queue
> + * @cache_invalidate_user: Flush hardware TLBs caching user space IO mappings
> + * @cache_invalidate_user_data_len: Defined length of input user data for the
> + * cache_invalidate_user op, being sizeof the
> + * structure in include/uapi/linux/iommufd.h
> * @iova_to_phys: translate iova to physical address
> * @enforce_cache_coherency: Prevent any kind of DMA from bypassing IOMMU_CACHE,
> * including no-snoop TLPs on PCIe or other platform
> @@ -379,6 +387,9 @@ struct iommu_domain_ops {
> size_t size);
> void (*iotlb_sync)(struct iommu_domain *domain,
> struct iommu_iotlb_gather *iotlb_gather);
> + int (*cache_invalidate_user)(struct iommu_domain *domain,
> + void *user_data);
If we are doing const unions, then this void * should also be a const
union.
Jason
