powerpc/kuap: Add a generic intermediate layer

[linux-2.6-microblaze.git] / arch / powerpc / include / asm / kup.h

diff --git a/arch/powerpc/include/asm/kup.h b/arch/powerpc/include/asm/kup.h
index fa8513b..f2a6fdb 100644 (file)
--- a/arch/powerpc/include/asm/kup.h
+++ b/arch/powerpc/include/asm/kup.h
@@ -41,17 +41,17 @@ void setup_kuap(bool disabled);
 static inline void setup_kuap(bool disabled) { }
 
 static inline bool
-bad_kuap_fault(struct pt_regs *regs, unsigned long address, bool is_write)
+__bad_kuap_fault(struct pt_regs *regs, unsigned long address, bool is_write)
 {
        return false;
 }
 
-static inline void kuap_assert_locked(void) { }
-static inline void kuap_save_and_lock(struct pt_regs *regs) { }
+static inline void __kuap_assert_locked(void) { }
+static inline void __kuap_save_and_lock(struct pt_regs *regs) { }
 static inline void kuap_user_restore(struct pt_regs *regs) { }
-static inline void kuap_kernel_restore(struct pt_regs *regs, unsigned long amr) { }
+static inline void __kuap_kernel_restore(struct pt_regs *regs, unsigned long amr) { }
 
-static inline unsigned long kuap_get_and_assert_locked(void)
+static inline unsigned long __kuap_get_and_assert_locked(void)
 {
        return 0;
 }
@@ -62,14 +62,65 @@ static inline unsigned long kuap_get_and_assert_locked(void)
  * platforms.
  */
 #ifndef CONFIG_PPC_BOOK3S_64
-static inline void allow_user_access(void __user *to, const void __user *from,
-                                    unsigned long size, unsigned long dir) { }
-static inline void prevent_user_access(unsigned long dir) { }
-static inline unsigned long prevent_user_access_return(void) { return 0UL; }
-static inline void restore_user_access(unsigned long flags) { }
+static inline void __allow_user_access(void __user *to, const void __user *from,
+                                      unsigned long size, unsigned long dir) { }
+static inline void __prevent_user_access(unsigned long dir) { }
+static inline unsigned long __prevent_user_access_return(void) { return 0UL; }
+static inline void __restore_user_access(unsigned long flags) { }
 #endif /* CONFIG_PPC_BOOK3S_64 */
 #endif /* CONFIG_PPC_KUAP */
 
+static __always_inline bool
+bad_kuap_fault(struct pt_regs *regs, unsigned long address, bool is_write)
+{
+       return __bad_kuap_fault(regs, address, is_write);
+}
+
+static __always_inline void kuap_assert_locked(void)
+{
+       __kuap_assert_locked();
+}
+
+#ifdef CONFIG_PPC32
+static __always_inline void kuap_save_and_lock(struct pt_regs *regs)
+{
+       __kuap_save_and_lock(regs);
+}
+#endif
+
+static __always_inline void kuap_kernel_restore(struct pt_regs *regs, unsigned long amr)
+{
+       __kuap_kernel_restore(regs, amr);
+}
+
+static __always_inline unsigned long kuap_get_and_assert_locked(void)
+{
+       return __kuap_get_and_assert_locked();
+}
+
+#ifndef CONFIG_PPC_BOOK3S_64
+static __always_inline void allow_user_access(void __user *to, const void __user *from,
+                                    unsigned long size, unsigned long dir)
+{
+       __allow_user_access(to, from, size, dir);
+}
+
+static __always_inline void prevent_user_access(unsigned long dir)
+{
+       __prevent_user_access(dir);
+}
+
+static __always_inline unsigned long prevent_user_access_return(void)
+{
+       return __prevent_user_access_return();
+}
+
+static __always_inline void restore_user_access(unsigned long flags)
+{
+       __restore_user_access(flags);
+}
+#endif /* CONFIG_PPC_BOOK3S_64 */
+
 static __always_inline void allow_read_from_user(const void __user *from, unsigned long size)
 {
        barrier_nospec();