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Commit 25da4618 authored by Juergen Gross's avatar Juergen Gross Committed by Boris Ostrovsky
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xen/events: don't unmask an event channel when an eoi is pending



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@vger.kernel.org
Fixes: 54c9de89 ("xen/events: add a new "late EOI" evtchn framework")
Reported-by: default avatarJulien Grall <julien@xen.org>
Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
Reviewed-by: default avatarJulien Grall <jgrall@amazon.com>
Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: default avatarRoss Lagerwall <ross.lagerwall@citrix.com>
Link: https://lore.kernel.org/r/20210306161833.4552-3-jgross@suse.com



[boris -- corrected Fixed tag format]

Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
parent 9e77d96b
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