Mattias Nissler

To clarify my environment: I ran a qemu vfio-user client against a qemu vfio-user server on a big-endian host. So, both client and server are in big-endian byte order and...

It's not a priority for me given that none of my stuff is running on big-endian host systems (I found this after checking on big-ending when checking qemu behavior in...

I've spent some more time looking into IOMMU/ATS/PRI/PASID and wrote some exploratory code. With this background, I think I have a better grasp now on what would be needed to...

FWIW, I have uploaded my proof-of-concept code at https://github.com/mnissler-rivos/libvfio-user/tree/ats It successfully handles PASID-enabled DMA read/write against pages that get dynamically requested. Tested with a standalone implementation of qemu's [edu device...

You will probably know/understand some/most of the below, but let me start at the beginning to present a coherent line of thought: The premise of placing IOMMUs in the DMA...

> What's foxing me about PRI here is really about who is actually acting as the IOMMU, I think. Presumably qemu+kvm itself still has all of guest memory mapped into...