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 <samuel.thibault@eu.citrix.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/extras/mini-os/fs-front.c b/extras/mini-os/fs-front.c
index dd8623d71a..131f134763 100644
--- a/extras/mini-os/fs-front.c
+++ b/extras/mini-os/fs-front.c
@@ -943,6 +943,7 @@ static int init_fs_import(struct fs_import *import)
                                 //ANY_CPU, 
                                 import, 
                                 &import->local_port));
+    unmask_evtchn(import->local_port);
 
     
     self_id = get_self_id();