[libvirt] Shared memoryBacking

[Marc-André Lureau]

Hi,

While trying to add vhost-user-gpu support to libvirt, I am wondering
how the guest should be configured to enable domain memory sharing.
Naively, I thought this alone should work:

<memoryBacking>
  <access mode='shared'/>
</memoryBacking>

But it doesn't seem to produce memory-backend-file share=on or
memory-backend-memfd (the later would be better for my case)

Any opinion on how to change that?

thanks

-- 
Marc-André Lureau