RE: [PATCH 1/4] iommu/vt-d: Implement set device pasid op for default domain

[Tian, Kevin]

> From: Baolu Lu <baolu.lu@xxxxxxxxxxxxxxx>
> Sent: Thursday, March 2, 2023 10:07 PM
> 
> > +
> > +	if (hw_pass_through && domain_type_is_si(dmar_domain))
> > +		ret = intel_pasid_setup_pass_through(iommu, dmar_domain,
> > +						     dev, pasid);
> > +	else if (dmar_domain->use_first_level)
> > +		ret = domain_setup_first_level(iommu, dmar_domain,
> > +					       dev, pasid);
> > +	else
> > +		ret = intel_pasid_setup_second_level(iommu, dmar_domain,
> > +						     dev, pasid);
> > +
> > +	return ret;
> > +}
> 
> Do you need to consider pasid cache invalidation?
> 

To avoid confusion this is not about invalidation of pasid cache itself
which should be covered by above setup functions already.

Here actually means per-PASID invalidation in iotlb and devtlb. Today
only RID is tracked per domain for invalidation. it needs extension to
walk attached pasid too.