From b9d1950675c67f10870debe164a226eef64f65d5 Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Tue, 18 Mar 2008 11:29:18 +0000 Subject: minios: Fix lost events evtchn_bind_interdomain used to clear any already pending event before binding a handler, because else the handler may be called before it is ready. That however leads to missed events, which I had to workaround for the HVM case. This changes the semantics of bind_evtchn, and thus of all the event channel binding functions (bind_virq, evtchn_alloc_unbound, evtchn_bind_interdomain) into not unmasking the event itself, hence letting the caller initialize properly before unmasking the port (e.g. record the port number in an appropriate place). Signed-off-by: Samuel Thibault --- extras/mini-os/xenbus/xenbus.c | 1 + 1 file changed, 1 insertion(+) (limited to 'extras/mini-os/xenbus') diff --git a/extras/mini-os/xenbus/xenbus.c b/extras/mini-os/xenbus/xenbus.c index 1a96ce2f24..147cef1331 100644 --- a/extras/mini-os/xenbus/xenbus.c +++ b/extras/mini-os/xenbus/xenbus.c @@ -257,6 +257,7 @@ void init_xenbus(void) err = bind_evtchn(start_info.store_evtchn, xenbus_evtchn_handler, NULL); + unmask_evtchn(start_info.store_evtchn); DEBUG("xenbus on irq %d\n", err); } -- cgit v1.2.3