Re: [PATCH 1/1] iommu/vt-d: Add set_dev_pasid callbacks for default domain

[Baolu Lu]

On 2022/6/14 13:36, Tian, Kevin wrote:
> > From: Baolu Lu<baolu.lu@xxxxxxxxxxxxxxx>
> > Sent: Tuesday, June 14, 2022 12:48 PM
> >
> > On 2022/6/14 12:02, Tian, Kevin wrote:
> > > > From: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
> > > > Sent: Tuesday, June 14, 2022 11:44 AM
> > > >
> > > > This allows the upper layers to set a domain to a PASID of a device
> > > > if the PASID feature is supported by the IOMMU hardware. The typical
> > > > use cases are, for example, kernel DMA with PASID and hardware
> > > > assisted mediated device drivers.
> > > why is it not part of the series for those use cases? There is no consumer
> > > of added callbacks in this patch...
> > It could be. I just wanted to maintain the integrity of Intel IOMMU
> > driver implementation.
> but let's not add dead code. and this patch is actually a right step
> simply from set_dev_pasid() p.o.v hence you should include in any
> series which first tries to use that interface.

Yes, that's my intention. If it reviews well, we can include it in the
driver's implementation.

Best regards,
baolu