lib: Process kernel taints

A small library routine to read '/proc/sys/kernel/taints' and check for
a fatal condition. This is currently used by the runner, but is also
useful for some tests.

v2,3: function docs

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Petri Latvala <petri.latvala@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/igt_taints.h b/lib/igt_taints.h
new file mode 100644
index 00000000..be4195c5
--- /dev/null
+++ b/lib/igt_taints.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2021 Intel Corporation
+ */
+
+#ifndef __IGT_TAINTS_H__
+#define __IGT_TAINTS_H__
+
+unsigned long igt_kernel_tainted(unsigned long *taints);
+const char *igt_explain_taints(unsigned long *taints);
+
+unsigned long igt_bad_taints(void);
+
+static inline unsigned long is_tainted(unsigned long taints)
+{
+	return taints & igt_bad_taints();
+}
+
+#endif /* __IGT_TAINTS_H__ */