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Subject[PATCH 2/5] powerpc/ftw: Define FTW_SETUP ioctl API
Date
Define the FTW_SETUP ioctl interface for fast thread wakeup (FTW). A
follow-on patch will implement the FTW driver and ioctl.

Thanks to input from Ben Herrenschmidt, Michael Neuling, Michael Ellerman.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
---
Changelog[v2]
- [Michael Neuling] Use a single VAS_FTW_SETUP ioctl and simplify
the interface.
---
include/uapi/misc/ftw.h | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 include/uapi/misc/ftw.h

diff --git a/include/uapi/misc/ftw.h b/include/uapi/misc/ftw.h
new file mode 100644
index 0000000..f233f51
--- /dev/null
+++ b/include/uapi/misc/ftw.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2018 IBM Corp.
+ *
+ * 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.
+ */
+
+#ifndef _UAPI_MISC_FTW_H
+#define _UAPI_MISC_FTW_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+#define FTW_FLAGS_PIN_WINDOW 0x1
+
+#define FTW_SETUP _IOW('v', 1, struct ftw_setup_attr)
+
+struct ftw_setup_attr {
+ __s16 version;
+ __s16 vas_id; /* specific instance of vas or -1 for default */
+ __u32 reserved;
+
+ __u64 reserved1;
+
+ __u64 flags;
+ __u64 reserved2;
+};
+
+#endif /* _UAPI_MISC_FTW_H */
--
2.7.4
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