[Rust-VMM] Is it time to start implementing Xen bindings for rust-vmm?

David Woodhouse dwmw2 at infradead.org
Wed Sep 22 12:03:52 UTC 2021

On Mon, 2021-09-13 at 13:44 +0100, Alex Bennée wrote:
> Hi,
> As we consider the next cycle for Project Stratos I would like to make
> some more progress on hypervisor agnosticism for our virtio backends.
> While we have implemented a number of virtio vhost-user backends using C
> we've rapidly switched to using rust-vmm based ones for virtio-i2c,
> virtio-rng and virtio-gpio. Given the interest in Rust for implementing
> backends does it make sense to do some enabling work in rust-vmm to
> support Xen?

I like this idea.

Somewhat separately, Alex Agache has already started some preliminary
hacking on supporting Xen guests within rust-vmm (on top of Linux/KVM):

Being able to run on *actual* Xen would be good too. And we should also
aspire to do guest-transparent live migration between the two hosting

Where relevant, it would be great to be able to share components (like
emulation of the Xen PCI platform device, a completely single-tenant
XenStore implementation dedicated to a single guest, perhaps PV
netback/blkback and other things). 

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