Re: [PATCH v1] s390/vfio-ap: Signal eventfd when guest AP configuration is changed

[Anthony Krowiak]

> Rorie, this is to inform listeners on the host of the guest.
> The guest itself already sees this "inside" with uevents triggered
> by the AP bus code.
>
> Do you have a consumer for these events?

There is a series of QEMU patches that register a notification handler 
for this
event. When that handler gets called, it generates and queues a CRW to 
the guest
indicating there is event information pending which will cause the AP 
bus driver
to get notified of the AP configuration change via its ap_bus_cfg_chg 
notifier call.

The QEMU series can be seen at:
https://lore.kernel.org/qemu-devel/7171c479-5cb4-4748-ba37-da4cf2fac35b@xxxxxxxxxxxxx/T/ 


Kind regards,
A Krowiak