Re: [RFC 8/8] iommu/vt-d: Add set_dev_pasid callback for nested domain

[Yi Liu]

On 2023/9/27 16:09, Tian, Kevin wrote:
> > From: Baolu Lu <baolu.lu@xxxxxxxxxxxxxxx>
> > Sent: Wednesday, September 27, 2023 3:58 PM
> >
> > On 2023/9/27 15:52, Tian, Kevin wrote:
> > > > From: Liu, Yi L<yi.l.liu@xxxxxxxxx>
> > > > Sent: Tuesday, September 26, 2023 5:27 PM
> > > >
> > > > From: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
> > > >
> > > > This allows the upper layers to set a nested type domain to a PASID of a
> > > > device if the PASID feature is supported by the IOMMU hardware.
> > > >
> > > > Signed-off-by: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
> > > > Signed-off-by: Yi Liu<yi.l.liu@xxxxxxxxx>
> > > > ---
> > > >    drivers/iommu/intel/nested.c | 47
> > > > ++++++++++++++++++++++++++++++++++++
> > > >    1 file changed, 47 insertions(+)
> > > pasid can be attached to either user hwpt or kernel hwpt.
> > >
> > > We should also introduce a set_dev_pasid callback for non-nest domain
> > ops.
> >
> > We already have the code in Linus' tree. The idxd driver uses it for
> > kernel DMA with pasid.
>
> ah, I forgot. 😊 probably can mention it in the commit message.

sure.

--
Regards,
Yi Liu