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Re: [PATCH v3] xen/evtchn: Introduce new IOCTL to bind static evtchn
- To: Juergen Gross <jgross@xxxxxxxx>
- From: Rahul Singh <Rahul.Singh@xxxxxxx>
- Date: Thu, 27 Jul 2023 08:27:22 +0000
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- Thread-topic: [PATCH v3] xen/evtchn: Introduce new IOCTL to bind static evtchn
HI Juergen,
> On 27 Jul 2023, at 6:54 am, Juergen Gross <jgross@xxxxxxxx> wrote:
>
> 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
Thanks.
Regards,
Rahul
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