Allow other kernel subsystems to check for kgdb debug sessions. This will
first be used by kvm to switch to conservative debug register saving/restoring
on x86 if kgdb is in use.
CC: Jason Wessel <jason.wessel@xxxxxxxxxxxxx>
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
include/linux/kgdb.h | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h
index 6adcc29..aebc768 100644
--- a/include/linux/kgdb.h
+++ b/include/linux/kgdb.h
@@ -72,6 +72,23 @@ struct uart_port;
*/
void kgdb_breakpoint(void);
+/**
+ * kgdb_in_use - Check if kgdb is currently in use
+ *
+ * This function allows other kernel subsystems to check if the kernel
+ * is currently being debugged via kgdb. It returns false if not or if
+ * kgdb support was not built into the kernel.
+ *
+ */
+static inline int kgdb_in_use(void)
+{
+#ifdef CONFIG_KGDB
+ return kgdb_connected;
+#else
+ return 0;
+#endif
+}
+
extern int kgdb_connected;
extern atomic_t kgdb_setting_breakpoint;
--
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