Re: [PATCH 18/23] iommu: Express DMA strictness via the domain type

[Lu Baolu]

On 2021/7/26 16:27, Robin Murphy wrote:
> On 2021-07-24 06:29, Lu Baolu wrote:
> > Hi Robin,
> >
> > On 2021/7/22 2:20, Robin Murphy wrote:
> > > Eliminate the iommu_get_dma_strict() indirection and pipe the
> > > information through the domain type from the beginning. Besides
> > > the flow simplification this also has several nice side-effects:
> > >
> > >   - Automatically implies strict mode for untrusted devices by
> > >     virtue of their IOMMU_DOMAIN_DMA override.
> > >   - Ensures that we only ends up using flush queues for drivers
> > >     which are aware of them and can actually benefit.
> >
> > Is this expressed by vendor iommu driver has ops->flush_iotlb_all?
>
> No, it's literally whether ->domain_alloc accepts the DMA_DOMAIN_FQ type 
> or not.

Get it. Thank you!

Best regards,
baolu