On Thu, Apr 28, 2016 at 09:26:01AM +0200, Jan Kiszka wrote: > On 2016-04-28 09:05, Peter Xu wrote: > > This patch introduces Intel VT-d IEC (Interrupt Entry Cache) > > invalidation notifier list. When vIOMMU receives IEC invalidate request, > > all the registered units will be notified with specific invalidation > > requests. > > This should be designed to be IOMMU-agnostic, i.e. become reusable for > the AMD implementation. I suspect we will have the same need for route > invalidations there as well...
Yes possibly... I feel like there are lots of things that can be shared between Intel and AMD IOMMUs. I just do not know what is the most suitable "extent" that we should abstract these shared functionalities between the two, and how. For example, AFAIU, a better solution for current IOMMU codes (including Intel and AMD) is to provide a common framework (like... X86IOMMU?), abstract these shared things out into a framework, like per device name spaces, iotlb, IEC notifications, etc... However, that will need a lot of further work. Also, I still do not know whether this is a good idea even in the future. So, will this be a good point that we start to think about common code blocks for both Intel and AMD IOMMU? Thanks, -- peterx
