Re: [PATCH v7 1/3] iommufd: Add data structure for Intel VT-d stage-1 cache invalidation

Jason Gunthorpe
2024-01-03T16:58:52Z

On Wed, Jan 03, 2024 at 08:48:46AM -0800, Nicolin Chen wrote:
> > You can pass the ctx to the invalidate op, it is already implied
> > because the passed iommu_domain is linked to a single iommufd ctx.
>
> The device virtual id lookup API needs something similar, yet it
> likely needs a viommu pointer (or its id) instead? As the table
> is attached to a viommu while an ictx can have multiple viommus,
> right?

Yes, when we get to an API for that it will have to be some op
'invalidate_viommu(..)' and it can get the necessary pointers.

The viommu object will have to be some driver object like the
iommu_domain.

Jason