Re: [PATCH 0/5] Xen: Add support for xl.cfg passthrough setting
On 4/24/20 4:57 AM, Marek Marczykowski-Górecki wrote:
On Fri, Apr 17, 2020 at 04:29:34PM -0600, Jim Fehlig wrote:
> Hi All,
>
> Note: This series is based on Marek's patches adding support for e820_host
>
> https://www.redhat.com/archives/libvir-list/2020-April/msg00633.html
>
> which I've ACK'ed, but am waiting to commit until this related setting is
> hashed out.
>
> This series adds support for Xen's xl.cfg(5) 'passthrough' setting.
> Starting with xen 4.13 this setting must be enabled in order to assign
> PCI passthrough devices to a guest. libxl will enable it automatically
> if the guest config has PCI devices at creation time, but otherwise
> 'passthrough' must be enabled to hotplug PCI devices.
>
> The passthrough setting is mapped to a xen hypervisor feature of the
> same name. Xen hypervisor features were recently added by the series
> mentioned above.
I'm wondering how does it relate to other drivers/hypervisors. Is there
any other that requires some option to be enabled to enable PCI hot
plugging?
I'm not aware of any, but may have overlooked something. I relayed the question
on IRC with no answer thus far.
If yes, I'd try to model this one similar to existing cases.
Definitely.
Otherwise modeling it as a Xen feature would make sense.
That is what I pushed, although we have about a week to change our minds :-).
Regards,
Jim