On 1/17/25 3:30 AM, Harald Freudenberger wrote:
On 2025-01-16 17:46, Anthony Krowiak wrote:
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
Ok, so this way the AP bus of the guest finally get's it's config
change callback invoked :-)
Yes, and it happens pretty quickly; at least in the test environment.
