Re: [PATCH v3 1/6] dmaengine: idxd: Add enable/disable device IOPF feature

[Dave Jiang]

On 4/2/23 10:49 PM, Baolu Lu wrote:
> On 3/24/23 8:02 PM, Lu Baolu wrote:
> > The iommu subsystem requires IOMMU_DEV_FEAT_IOPF must be enabled before
> > and disabled after IOMMU_DEV_FEAT_SVA, if device's I/O page faults rely
> > on the IOMMU. Add explicit IOMMU_DEV_FEAT_IOPF enabling/disabling in this
> > driver.
> >
> > At present, missing IOPF enabling/disabling doesn't cause any real issue,
> > because the IOMMU driver places the IOPF enabling/disabling in the path
> > of SVA feature handling. But this may change.
> >
> > Reviewed-by: Dave Jiang<dave.jiang@xxxxxxxxx>
> > Reviewed-by: Fenghua Yu<fenghua.yu@xxxxxxxxx>
> > Reviewed-by: Kevin Tian<kevin.tian@xxxxxxxxx>
> > Signed-off-by: Lu Baolu<baolu.lu@xxxxxxxxxxxxxxx>
>
> Hi Dave and Fenghua,
>
> The following iommu patches depends on this one. Can I route it to
> Linus through the iommu tree?

Hi Baolu, you'll need an ack from Vinod, who is the dmaengine subsystem 
maintainer. I have no objections.


> Best regards,
> baolu