1 files changed, 41 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/vdso.h b/arch/riscv/include/asm/vdso.h
new file mode 100644
index 000000000..f89147882
--- /dev/null
+++ b/arch/riscv/include/asm/vdso.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 ARM Limited
+ * Copyright (C) 2014 Regents of the University of California
+ * Copyright (C) 2017 SiFive
+ */
+
+#ifndef _ASM_RISCV_VDSO_H
+#define _ASM_RISCV_VDSO_H
+
+/*
+ * All systems with an MMU have a VDSO, but systems without an MMU don't
+ * support shared libraries and therefore don't have one.
+ */
+#ifdef CONFIG_MMU
+
+#define __VVAR_PAGES    2
+
+#ifndef __ASSEMBLY__
+#include <generated/vdso-offsets.h>
+
+#define VDSO_SYMBOL(base, name)							\
+	(void __user *)((unsigned long)(base) + __vdso_##name##_offset)
+
+#ifdef CONFIG_COMPAT
+#include <generated/compat_vdso-offsets.h>
+
+#define COMPAT_VDSO_SYMBOL(base, name)						\
+	(void __user *)((unsigned long)(base) + compat__vdso_##name##_offset)
+
+extern char compat_vdso_start[], compat_vdso_end[];
+
+#endif /* CONFIG_COMPAT */
+
+extern char vdso_start[], vdso_end[];
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* CONFIG_MMU */
+
+#endif /* _ASM_RISCV_VDSO_H */