On 2024/11/6 17:14, Yi Liu wrote:
On 2024/11/6 16:41, Baolu Lu wrote:
On 2024/11/6 16:17, Tian, Kevin wrote:
From: Liu, Yi L <yi.l.liu@xxxxxxxxx>
Sent: Monday, November 4, 2024 9:19 PM
+
+ dev_pasid = domain_add_dev_pasid(domain, dev, pasid);
+ if (IS_ERR(dev_pasid))
+ return PTR_ERR(dev_pasid);
+
+ ret = domain_setup_nested(iommu, dmar_domain, dev, pasid, old);
+ if (ret)
+ goto out_remove_dev_pasid;
+
+ domain_remove_dev_pasid(old, dev, pasid);
+
forgot one thing. Why not required to create a debugfs entry for
nested dev_pasid?
This debugfs node is only created for paging domain.
I think Kevin got one point. The debugfs is added when paging domain
is attached. How about the paging domains that is only used as nested
parent domain. We seem to lack a debugfs node for such paging domains.
Are you talking about the nested parent domain? It's also a paging
domain, hence a debugfs node will be created.
