Re: [PATCH 1/1] iommu/arm-smmu-v3: add support for BBML

[Leizhen (ThunderTown)]

On 2021/1/26 18:12, Will Deacon wrote:
> On Mon, Jan 25, 2021 at 08:23:40PM +0000, Robin Murphy wrote:
>> Now we probably will need some degreee of BBML feature awareness for the
>> sake of SVA if and when we start using it for CPU pagetables, but I still
>> cannot see any need to consider it in io-pgtable.
> 
> Agreed; I don't think this is something that io-pgtable should have to care
> about.

Yes, the SVA works in stall mode, and the failed device access requests are not
discarded.

Let me look for examples. The BBML usage scenario was told by a former colleague.

> 
> Will
> 
> .
>