Re: [PATCH 1/1] iommu/vt-d: Move PCI PASID enablement to probe path

[Baolu Lu]

On 2024/8/16 20:16, Vasant Hegde wrote:
> On 8/16/2024 4:19 PM, Lu Baolu wrote:
> > Currently, PCI PASID is enabled alongside PCI ATS when an iommu domain is
> > attached to the device and disabled when the device transitions to block
> > translation mode. This approach is inappropriate as PCI PASID is a device
> > feature independent of the type of the attached domain.
> Reading through other thread, I thought we want to enable both PASID and PRI in
> device probe path. Did I miss something?

PRI is different. PRI should be enabled when the first iopf-capable
domain is attached to device or its PASID, and disabled when the last
such domain is detached.

Thanks,
baolu