Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 39 insertions, 0 deletions

diff --git a/arch/loongarch/include/asm/vdso.h b/arch/loongarch/include/asm/vdso.h
new file mode 100644
index 000000000..d3ba35eb2
--- /dev/null
+++ b/arch/loongarch/include/asm/vdso.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Author: Huacai Chen <chenhuacai@loongson.cn>
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+
+#ifndef __ASM_VDSO_H
+#define __ASM_VDSO_H
+
+#include <linux/mm.h>
+#include <linux/mm_types.h>
+#include <vdso/datapage.h>
+
+#include <asm/barrier.h>
+
+/*
+ * struct loongarch_vdso_info - Details of a VDSO image.
+ * @vdso: Pointer to VDSO image (page-aligned).
+ * @size: Size of the VDSO image (page-aligned).
+ * @off_rt_sigreturn: Offset of the rt_sigreturn() trampoline.
+ * @code_mapping: Special mapping structure for vdso code.
+ * @code_mapping: Special mapping structure for vdso data.
+ *
+ * This structure contains details of a VDSO image, including the image data
+ * and offsets of certain symbols required by the kernel. It is generated as
+ * part of the VDSO build process, aside from the mapping page array, which is
+ * populated at runtime.
+ */
+struct loongarch_vdso_info {
+	void *vdso;
+	unsigned long size;
+	unsigned long offset_sigreturn;
+	struct vm_special_mapping code_mapping;
+	struct vm_special_mapping data_mapping;
+};
+
+extern struct loongarch_vdso_info vdso_info;
+
+#endif /* __ASM_VDSO_H */