On 28.02.20 11:30, Jan Kiszka wrote:
On 28.02.20 11:16, Alex Bennée wrote:
Hi,
I'm currently trying to get my head around virtio and was wondering how
widespread adoption of virtio is amongst the various hypervisors and
emulators out there.
Obviously I'm familiar with QEMU both via KVM and even when just doing
plain emulation (although with some restrictions). As far as I'm aware
the various Rust based VMMs have vary degrees of support for virtio
devices over KVM as well. CrosVM specifically is embracing virtio for
multi-process device emulation.
I believe there has been some development work for supporting VIRTIO on
Xen although it seems to have stalled according to:
https://wiki.xenproject.org/wiki/Virtio_On_Xen
Recently at KVM Forum there was Jan's talk about Inter-VM shared memory
which proposed ivshmemv2 as a VIRTIO transport:
https://events19.linuxfoundation.org/events/kvm-forum-2019/program/schedule/
As I understood it this would allow Xen (and other hypervisors) a simple
way to be able to carry virtio traffic between guest and end point.
And to clarify the scope of this effort: virtio-over-ivshmem is not the
fastest option to offer virtio to a guest (static "DMA" window), but it
is the simplest one from the hypervisor PoV and, thus, also likely the
easiest one to argue over when it comes to security and safety.
Jan
So some questions:
- Am I missing anything out in that summary?
- How about HyperV and the OSX equivalent?
- Do any other type-1 hypervisors support virtio?
From the top of my head, some other hypervisors with virtio support
(irrespective of any classification):
https://wiki.freebsd.org/bhyve
https://projectacrn.org/
http://www.xhypervisor.org/
https://www.opensynergy.com/automotive-hypervisor/
But there are likely more.
Jan
--
Siemens AG, Corporate Technology, CT RDA IOT SES-DE
Corporate Competence Center Embedded Linux
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