Re: [RFC PATCH 00/12] s390: virtio: support protected virtualization

Halil Pasic
2019-04-16T11:10:05Z

On Fri, 12 Apr 2019 15:47:50 +0200
David Hildenbrand <david@redhat.com> wrote:

> On 05.04.19 01:16, Halil Pasic wrote:
> > Enhanced virtualization protection technology may require the use of
> > bounce buffers for I/O. While support for this was built into the virtio
> > core, virtio-ccw wasn't changed accordingly.
>
> Can you elaborate some more about the general approach (Enhanced
> virtualization protection technology, ultravisor, concept, issues, how
> to squeeze it into QEMU/KVM/kernel) etc =
>
> For my taste, this cover letter misses some important context :)
>

I'm aware. Unfortunately we don't have a decision yet about which parts
of the protected virtualization architecture are going to be PoP
material.

You can get some more context immediately by having a look at Martin's
features branch and looking at the s390/protvirt and s390/uv patches.

I will try to provide more background information for v1. But having
a remotely complete and reliable documentation will take some time. What
I can offer at the moment is answers to specific questions.

Regards,
Halil