Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / s390 / char / vmcp.h

diff --git a/kernel/drivers/s390/char/vmcp.h b/kernel/drivers/s390/char/vmcp.h
new file mode 100644 (file)
index 0000000..1e29b04
--- /dev/null
+++ b/kernel/drivers/s390/char/vmcp.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright IBM Corp. 2004, 2005
+ * Interface implementation for communication with the z/VM control program
+ * Version 1.0
+ * Author(s): Christian Borntraeger <cborntra@de.ibm.com>
+ *
+ *
+ * z/VMs CP offers the possibility to issue commands via the diagnose code 8
+ * this driver implements a character device that issues these commands and
+ * returns the answer of CP.
+ *
+ * The idea of this driver is based on cpint from Neale Ferguson
+ */
+
+#include <linux/ioctl.h>
+#include <linux/mutex.h>
+
+#define VMCP_GETCODE _IOR(0x10, 1, int)
+#define VMCP_SETBUF _IOW(0x10, 2, int)
+#define VMCP_GETSIZE _IOR(0x10, 3, int)
+
+struct vmcp_session {
+       unsigned int bufsize;
+       char *response;
+       int resp_size;
+       int resp_code;
+       /* As we use copy_from/to_user, which might     *
+        * sleep and cannot use a spinlock              */
+       struct mutex mutex;
+};