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authorStefano Stabellini <sstabellini@kernel.org>2017-07-05 13:08:39 -0700
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-08-31 09:45:55 -0400
commit72e59c30df449bc7fe601716e60c824b4ffe606d (patch)
treed5b6eb4610cb88e66a8fb556234c94141bf2ddf8 /drivers/xen/pvcalls-back.c
parent75e3ea5ba7d7a6c171c62c710990f2a5fb07e19a (diff)
xen/pvcalls: introduce the pvcalls xenbus backend
Introduce a xenbus backend for the pvcalls protocol, as defined by https://xenbits.xen.org/docs/unstable/misc/pvcalls.html. This patch only adds the stubs, the code will be added by the following patches. Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen/pvcalls-back.c')
-rw-r--r--drivers/xen/pvcalls-back.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c
new file mode 100644
index 000000000000..f3d0daad3da6
--- /dev/null
+++ b/drivers/xen/pvcalls-back.c
@@ -0,0 +1,61 @@
+/*
+ * (c) 2017 Stefano Stabellini <stefano@aporeto.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kthread.h>
+#include <linux/list.h>
+#include <linux/radix-tree.h>
+#include <linux/module.h>
+#include <linux/semaphore.h>
+#include <linux/wait.h>
+
+#include <xen/events.h>
+#include <xen/grant_table.h>
+#include <xen/xen.h>
+#include <xen/xenbus.h>
+#include <xen/interface/io/pvcalls.h>
+
+static int pvcalls_back_probe(struct xenbus_device *dev,
+ const struct xenbus_device_id *id)
+{
+ return 0;
+}
+
+static void pvcalls_back_changed(struct xenbus_device *dev,
+ enum xenbus_state frontend_state)
+{
+}
+
+static int pvcalls_back_remove(struct xenbus_device *dev)
+{
+ return 0;
+}
+
+static int pvcalls_back_uevent(struct xenbus_device *xdev,
+ struct kobj_uevent_env *env)
+{
+ return 0;
+}
+
+static const struct xenbus_device_id pvcalls_back_ids[] = {
+ { "pvcalls" },
+ { "" }
+};
+
+static struct xenbus_driver pvcalls_back_driver = {
+ .ids = pvcalls_back_ids,
+ .probe = pvcalls_back_probe,
+ .remove = pvcalls_back_remove,
+ .uevent = pvcalls_back_uevent,
+ .otherend_changed = pvcalls_back_changed,
+};