On 2022/5/20 16:45, Joerg Roedel wrote:
On Mon, May 16, 2022 at 09:57:56AM +0800, Lu Baolu wrote:const struct iommu_domain_ops *default_domain_ops; + const struct iommu_domain_ops *blocking_domain_ops;I don't understand why extra domain-ops are needed for this. I think it would be more straight-forward to implement allocation of IOMMU_DOMAIN_BLOCKED domains in each driver and let the details be handled in the set_dev() call-back. The IOMMU driver can make sure DMA is blocked for a device when it encounters a IOMMU_DOMAIN_BLOCKED domain. For IOMMUs that have no explicit way to block DMA could just use an unmanaged domain with an empty page-table.
Yes, this is what will go. Best regards, baolu _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
