RE: [PATCH v4 08/17] iommufd: Always setup MSI and anforce cc on kernel-managed domains

From: Liu, Yi L yi.l.liu@intel.com Sent: Thursday, September 21, 2023 3:51 PM

From: Nicolin Chen nicolinc@nvidia.com

Now enforce_cache_coherency and msi_cookie are kernel-managed hwpt things. So, they should be only setup on kernel-managed domains. If the attaching domain is a user-managed domain, redirect the hwpt to hwpt->parent to do it correctly.

No redirection. The parent should already have the configuration done when it's created. It shouldn't be triggered in the nesting path.