From 6fca8abef7e6d7be1a9e6d93dd0f2b7fbc5b28e5 Mon Sep 17 00:00:00 2001
From: Pasha <pasha@member.fsf.org>
Date: Tue, 20 Feb 2024 18:55:36 +0000
Subject: initial risc-v example

---
 riscv/include/asm/mmu_context.h | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 riscv/include/asm/mmu_context.h

(limited to 'riscv/include/asm/mmu_context.h')

diff --git a/riscv/include/asm/mmu_context.h b/riscv/include/asm/mmu_context.h
new file mode 100644
index 0000000..7030837
--- /dev/null
+++ b/riscv/include/asm/mmu_context.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 Regents of the University of California
+ * Copyright (C) 2017 SiFive
+ */
+
+#ifndef _ASM_RISCV_MMU_CONTEXT_H
+#define _ASM_RISCV_MMU_CONTEXT_H
+
+#include <linux/mm_types.h>
+#include <asm-generic/mm_hooks.h>
+
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+	struct task_struct *task);
+
+#define activate_mm activate_mm
+static inline void activate_mm(struct mm_struct *prev,
+			       struct mm_struct *next)
+{
+	switch_mm(prev, next, NULL);
+}
+
+#define init_new_context init_new_context
+static inline int init_new_context(struct task_struct *tsk,
+			struct mm_struct *mm)
+{
+#ifdef CONFIG_MMU
+	atomic_long_set(&mm->context.id, 0);
+#endif
+	return 0;
+}
+
+DECLARE_STATIC_KEY_FALSE(use_asid_allocator);
+
+#include <asm-generic/mmu_context.h>
+
+#endif /* _ASM_RISCV_MMU_CONTEXT_H */
-- 
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