From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Tue, 16 Apr 2019 13:10:05 +0200 From: Halil Pasic Subject: Re: [RFC PATCH 00/12] s390: virtio: support protected virtualization In-Reply-To: References: <20190404231622.52531-1-pasic@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Message-Id: <20190416131005.6f3e05eb@oc2783563651> Sender: kvm-owner@vger.kernel.org List-Archive: List-Post: To: David Hildenbrand Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, Cornelia Huck , Martin Schwidefsky , Sebastian Ott , virtualization@lists.linux-foundation.org, Christian Borntraeger , Viktor Mihajlovski , Vasily Gorbik , Janosch Frank , Claudio Imbrenda , Farhan Ali , Eric Farman List-ID: On Fri, 12 Apr 2019 15:47:50 +0200 David Hildenbrand 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