Re: [RFC v2] /dev/iommu uAPI proposal

[Jean-Philippe Brucker]

Hi Kevin,

On Fri, Jul 09, 2021 at 07:48:44AM +0000, Tian, Kevin wrote:
> /dev/iommu provides an unified interface for managing I/O page tables for 
> devices assigned to userspace. Device passthrough frameworks (VFIO, vDPA, 
> etc.) are expected to use this interface instead of creating their own logic to 
> isolate untrusted device DMAs initiated by userspace. 
> 
> This proposal describes the uAPI of /dev/iommu and also sample sequences 
> with VFIO as example in typical usages. The driver-facing kernel API provided 
> by the iommu layer is still TBD, which can be discussed after consensus is 
> made on this uAPI.

The document looks good to me, I don't have other concerns at the moment

Thanks,
Jean