Add build system scaffolding and libc headers

1 files changed, 25 insertions, 0 deletions

diff --git a/include/arch/x86_64/linux/coresight-stm.h b/include/arch/x86_64/linux/coresight-stm.h
new file mode 100644
index 00000000..78eec91b
--- /dev/null
+++ b/include/arch/x86_64/linux/coresight-stm.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __UAPI_CORESIGHT_STM_H_
+#define __UAPI_CORESIGHT_STM_H_
+
+#include <linux/const.h>
+
+#define STM_FLAG_TIMESTAMPED _BITUL(3)
+#define STM_FLAG_MARKED	     _BITUL(4)
+#define STM_FLAG_GUARANTEED  _BITUL(7)
+
+/*
+ * The CoreSight STM supports guaranteed and invariant timing
+ * transactions.  Guaranteed transactions are guaranteed to be
+ * traced, this might involve stalling the bus or system to
+ * ensure the transaction is accepted by the STM.  While invariant
+ * timing transactions are not guaranteed to be traced, they
+ * will take an invariant amount of time regardless of the
+ * state of the STM.
+ */
+enum {
+	STM_OPTION_GUARANTEED = 0,
+	STM_OPTION_INVARIANT,
+};
+
+#endif