Re: [PATCH v2 4/8] iommu/vt-d: Reserve RID_PASID from global SVA PASID space

[Vasant Hegde]

On 3/28/2023 10:50 AM, Baolu Lu wrote:
> On 3/28/23 7:21 AM, Jacob Pan wrote:
>> On VT-d platforms, RID_PASID is used for DMA request without PASID. We
>> should not treat RID_PASID special instead let it be allocated from the
>> global SVA PASID number space.
> 
> It's same to AMD and ARM SMMUv3, right? They also need an explicit
> reservation of PASID 0.

Yes for AMD driver. (Requests from the I/O device without a PASID are treated as
if they have PASID of 0).


-Vasant