Re: [PATCH RFC 2/2] iommu/arm-smmu-v3: Bypass SID0 for NXP i.MX95

[Jason Gunthorpe]

On Tue, Oct 15, 2024 at 08:13:28AM +0000, Pranjal Shrivastava wrote:

> Umm.. this was specific for rmr not a generic thing. I'd suggest to
> avoid meddling with the STEs directly for acheiving bypass. Playing
> with the iommu domain type could be neater. Perhaps, modify the
> ops->def_domain_type to return an appropriate domain?

Yeah, that is the expected way, to force the def_domain_type to
IDENTITY and refuse to attach a PAGING/BLOCKED domain.

If this is a common thing we could have the core code take on more of
the job.

Jason