Re: [PATCH v3 2/8] xen/events: don't unmask an event channel when an eoi is pending

[Julien Grall]

Hi Juergen,

On 19/02/2021 15:40, Juergen Gross wrote:
> An event channel should be kept masked when an eoi is pending for it.
> When being migrated to another cpu it might be unmasked, though.
>
> In order to avoid this keep three different flags for each event channel
> to be able to distinguish "normal" masking/unmasking from eoi related
> masking/unmasking and temporary masking. The event channel should only
> be able to generate an interrupt if all flags are cleared.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 54c9de89895e0a36047 ("xen/events: add a new late EOI evtchn framework")
> Reported-by: Julien Grall <julien@xxxxxxx>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>

Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall