On 16.04.19 13:10, Halil Pasic wrote: > On Fri, 12 Apr 2019 15:47:50 +0200 > David Hildenbrand <david@xxxxxxxxxx> 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. Oh, okay. > > 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. As I don't have time to dig through random branches to discover/reverse-engineer the obvious, I won't be reviewing this patch series. But as I am not an I/O expert, this might not be bad at all :) Maybe other people can help. > > 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. Waiting for v1 then. Cheers! -- Thanks, David / dhildenb
