Re: [PATCH v3] xen/evtchn: Introduce new IOCTL to bind static evtchn

[Juergen Gross <jgross@xxxxxxxx>]

On 18.07.23 13:31, Rahul Singh wrote:
> Xen 4.17 supports the creation of static evtchns. To allow user space
> application to bind static evtchns introduce new ioctl
> "IOCTL_EVTCHN_BIND_STATIC". Existing IOCTL doing more than binding
> that’s why we need to introduce the new IOCTL to only bind the static
> event channels.
>
> Static evtchns to be available for use during the lifetime of the
> guest. When the application exits, __unbind_from_irq() ends up being
> called from release() file operations because of that static evtchns
> are getting closed. To avoid closing the static event channel, add the
> new bool variable "is_static" in "struct irq_info" to mark the event
> channel static when creating the event channel to avoid closing the
> static evtchn.
>
> Also, take this opportunity to remove the open-coded version of the
> evtchn close in drivers/xen/evtchn.c file and use xen_evtchn_close().
>
> Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
Pushed to xen/tip.git for-linus-6.5a


Juergen

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