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authorRusty Russell <rusty@rustcorp.com.au>2009-06-12 22:27:09 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-06-12 22:27:10 +0930
commitdf60aeef4f4fe0645d9a195a7689005520422de5 (patch)
tree3cfa3c4a986436c8accd5f0a57d5a6f70f1b7965 /include/linux/lguest_launcher.h
parent5718607bb670c721f45f0dbb1cc7d6c64969aab1 (diff)
lguest: use eventfds for device notification
Currently, when a Guest wants to perform I/O it calls LHCALL_NOTIFY with an address: the main Launcher process returns with this address, and figures out what device to run. A far nicer model is to let processes bind an eventfd to an address: if we find one, we simply signal the eventfd. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Davide Libenzi <davidel@xmailserver.org>
Diffstat (limited to 'include/linux/lguest_launcher.h')
-rw-r--r--include/linux/lguest_launcher.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/lguest_launcher.h b/include/linux/lguest_launcher.h
index a53407a4165..9de964b9058 100644
--- a/include/linux/lguest_launcher.h
+++ b/include/linux/lguest_launcher.h
@@ -58,6 +58,7 @@ enum lguest_req
LHREQ_GETDMA, /* No longer used */
LHREQ_IRQ, /* + irq */
LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */
+ LHREQ_EVENTFD, /* + address, fd. */
};
/* The alignment to use between consumer and producer parts of vring.