From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Krowiak Subject: Re: [RFC 00/19] KVM: s390/crypto/vfio: guest dedicated crypto adapters Date: Mon, 16 Oct 2017 12:27:52 -0400 Message-ID: References: <1507916344-3896-1-git-send-email-akrowiak@linux.vnet.ibm.com> <20171016120514.62145b4f.cohuck@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20171016120514.62145b4f.cohuck@redhat.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: Cornelia Huck Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, qemu-s390x@nongnu.org, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com List-ID: On 10/16/2017 06:05 AM, Cornelia Huck wrote: > On Fri, 13 Oct 2017 13:38:45 -0400 > Tony Krowiak wrote: > >> Overview: >> -------- >> An adjunct processor (AP) facility is an IBM Z cryptographic facility. The >> AP facility is comprised of three AP instructions and from 1 to 256 AP >> adapter cards. The design takes advantage of the interpretive execution mode >> provided by the SIE architecture. With interpretive execution mode, the AP >> instructions executed on the guest are interpreted by the hardware. This >> allows guests direct access to AP adapter cards. The first goal of this >> patch series is to provide direct access by a KVM guest to an AP as a >> pass-through device. The second goal is to provide administrators with the >> means to configure KVM guests to grant direct access to AP facilities >> assigned to the LPAR in which the host linux system is running. >> >> To facilitate the comprehension of the design, let's present an overview of >> the AP architecture. > I have not yet looked at the patches (and I'm not sure whether I'll be > able to do so until after the KVM Forum), but I think this also needs > some explanation under Documentation/, so people can still make sense > of it in the future. That makes sense, I will create a document. >