Re: [PATCH v1 02/14] iommufd: Add nesting related data structures for ARM SMMUv3

[Jason Gunthorpe]

On Thu, Mar 09, 2023 at 08:50:52PM -0800, Nicolin Chen wrote:
> On Thu, Mar 09, 2023 at 10:48:50AM -0400, Jason Gunthorpe wrote:
> 
> > Nicolin, I think we should tweak the uAPI here so that the
> > invalidation opaque data has a format tagged on its own, instead of
> > re-using the HWPT tag. Ie you can have a ARM SMMUv3 invalidate type
> > tag and also a virtio-viommu invalidate type tag.
> 
> The invalidation tage is shared with the hwpt allocation. Does
> it mean that virtio-iommu won't have it's own allocation tag?

We probably shouldn't assume it will

Jason