> -----Original Message----- > From: kvm-owner@xxxxxxxxxxxxxxx <kvm-owner@xxxxxxxxxxxxxxx> On > Behalf Of Stefan Hajnoczi > Sent: 15 July 2020 12:24 > To: Nikos Dragazis <ndragazis@xxxxxxxxxxx>; Jan Kiszka > <jan.kiszka@xxxxxxxxxxx> > Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>; Thanos Makatos > <thanos.makatos@xxxxxxxxxxx>; John G. Johnson > <john.g.johnson@xxxxxxxxxx>; Andra-Irina Paraschiv > <andraprs@xxxxxxxxxx>; Alexander Graf <graf@xxxxxxxxxx>; qemu- > devel@xxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; Maxime Coquelin > <maxime.coquelin@xxxxxxxxxx>; Alex Bennée <alex.bennee@xxxxxxxxxx> > Subject: Inter-VM device emulation (call on Mon 20th July 2020) > > Hi, > Several projects are underway to create an inter-VM device emulation > interface: > > * ivshmem v2 > https://www.mail-archive.com/qemu-devel@xxxxxxxxxx/msg706465.html > > A PCI device that provides shared-memory communication between VMs. > This device already exists but is limited in its current form. The > "v2" project updates IVSHMEM's capabilities and makes it suitable as > a VIRTIO transport. > > Jan Kiszka is working on this and has posted specs for review. > > * virtio-vhost-user > https://www.mail-archive.com/virtio-dev@lists.oasis- > open.org/msg06429.html > > A VIRTIO device that transports the vhost-user protocol. Allows > vhost-user device emulation to be implemented by another VM. > > Nikos Dragazis is working on this with QEMU, DPDK, and VIRTIO patches > posted. > > * VFIO-over-socket > https://github.com/tmakatos/qemu/blob/master/docs/devel/vfio-over- > socket.rst > > Similar to the vhost-user protocol in spirit but for any PCI device. > Uses the Linux VFIO ioctl API as the protocol instead of vhost. > > It doesn't have a virtio-vhost-user equivalent yet, but the same > approach could be applied to VFIO-over-socket too. > > Thanos Makatos and John G. Johnson are working on this. The draft > spec is available. > > Let's have a call to figure out: > > 1. What is unique about these approaches and how do they overlap? > 2. Can we focus development and code review efforts to get something > merged sooner? > > Jan and Nikos: do you have time to join on Monday, 20th of July at 15:00 > UTC? > https://www.timeanddate.com/worldclock/fixedtime.html?iso=20200720T1 > 500 > > Video call URL: https://bluejeans.com/240406010 > > It would be nice if Thanos and/or JJ could join the call too. Others > welcome too (feel free to forward this email)! Sure! > > Stefan
