1 files changed, 35 insertions, 0 deletions

diff --git a/include/asm-generic/error-injection.h b/include/asm-generic/error-injection.h
new file mode 100644
index 000000000000..296c65442f00
--- /dev/null
+++ b/include/asm-generic/error-injection.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_GENERIC_ERROR_INJECTION_H
+#define _ASM_GENERIC_ERROR_INJECTION_H
+
+#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
+enum {
+        EI_ETYPE_NONE,          /* Dummy value for undefined case */
+        EI_ETYPE_NULL,          /* Return NULL if failure */
+        EI_ETYPE_ERRNO,         /* Return -ERRNO if failure */
+        EI_ETYPE_ERRNO_NULL,    /* Return -ERRNO or NULL if failure */
+};
+
+struct error_injection_entry {
+        unsigned long   addr;
+        int             etype;
+};
+
+#ifdef CONFIG_FUNCTION_ERROR_INJECTION
+/*
+ * Whitelist ganerating macro. Specify functions which can be
+ * error-injectable using this macro.
+ */
+#define ALLOW_ERROR_INJECTION(fname, _etype)                            \
+static struct error_injection_entry __used                              \
+        __attribute__((__section__("_error_injection_whitelist")))      \
+        _eil_addr_##fname = {                                           \
+                .addr = (unsigned long)fname,                           \
+                .etype = EI_ETYPE_##_etype,                             \
+        };
+#else
+#define ALLOW_ERROR_INJECTION(fname, _etype)
+#endif
+#endif
+
+#endif /* _ASM_GENERIC_ERROR_INJECTION_H */