Re: [RFC PATCH] xen: privcmd: fix ioeventfd/ioreq crashing PV domain

Demi Marie Obenour
2025-10-19T00:42:08Z

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I'm pretty sure Xen doesn't support ioeventfd at all yet. There are
two options:

1. Port the backend to use an ioreq server instead of ioeventfd.
2. Modify Linux (and possibly Xen) to support ioeventfd.

Which virtio device are you trying to implement? virtio-GPU will need
a lot of additional work and it would probably be best to discuss
this privately (over a call or similar). Others are likely to be
significantly easier.