This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / xen / interface / callback.h

diff --git a/include/xen/interface/callback.h b/include/xen/interface/callback.h
new file mode 100644 (file)
index 0000000..b497d99
--- /dev/null
+++ b/include/xen/interface/callback.h
@@ -0,0 +1,74 @@
+/******************************************************************************
+ * callback.h
+ *
+ * Register guest OS callbacks with Xen.
+ *
+ * Copyright (c) 2006, Ian Campbell
+ */
+
+#ifndef __XEN_PUBLIC_CALLBACK_H__
+#define __XEN_PUBLIC_CALLBACK_H__
+
+#include "xen.h"
+
+/*
+ * Prototype for this hypercall is:
+ *   long callback_op(int cmd, void *extra_args)
+ * @cmd        == CALLBACKOP_??? (callback operation).
+ * @extra_args == Operation-specific extra arguments (NULL if none).
+ */
+
+#define CALLBACKTYPE_event                 0
+#define CALLBACKTYPE_failsafe              1
+#define CALLBACKTYPE_syscall               2 /* x86_64 only */
+/*
+ * sysenter is only available on x86_32 with the
+ * supervisor_mode_kernel option enabled.
+ */
+#define CALLBACKTYPE_sysenter              3
+#define CALLBACKTYPE_nmi                   4
+
+/*
+ * Disable event deliver during callback? This flag is ignored for event and
+ * NMI callbacks: event delivery is unconditionally disabled.
+ */
+#define _CALLBACKF_mask_events             0
+#define CALLBACKF_mask_events              (1U << _CALLBACKF_mask_events)
+
+/*
+ * Register a callback.
+ */
+#define CALLBACKOP_register                0
+struct callback_register {
+    uint16_t type;
+    uint16_t flags;
+    xen_callback_t address;
+};
+typedef struct callback_register callback_register_t;
+DEFINE_XEN_GUEST_HANDLE(callback_register_t);
+
+/*
+ * Unregister a callback.
+ *
+ * Not all callbacks can be unregistered. -EINVAL will be returned if
+ * you attempt to unregister such a callback.
+ */
+#define CALLBACKOP_unregister              1
+struct callback_unregister {
+    uint16_t type;
+    uint16_t _unused;
+};
+typedef struct callback_unregister callback_unregister_t;
+DEFINE_XEN_GUEST_HANDLE(callback_unregister_t);
+
+#endif /* __XEN_PUBLIC_CALLBACK_H__ */
+
+/*
+ * Local variables:
+ * mode: C
+ * c-set-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */