x86/mm: Provide general kernel support for memory encryption

[linux-2.6-block.git] / include / linux / mem_encrypt.h

diff --git a/include/linux/mem_encrypt.h b/include/linux/mem_encrypt.h
index 570f4fcff13f174c9c47590fb4e4d40adaaaed96..1255f09f5e425a293d2da840242fab393a1cbb9e 100644 (file)
--- a/include/linux/mem_encrypt.h
+++ b/include/linux/mem_encrypt.h
@@ -35,6 +35,14 @@ static inline unsigned long sme_get_me_mask(void)
        return sme_me_mask;
 }
 
+/*
+ * The __sme_set() and __sme_clr() macros are useful for adding or removing
+ * the encryption mask from a value (e.g. when dealing with pagetable
+ * entries).
+ */
+#define __sme_set(x)           ((unsigned long)(x) | sme_me_mask)
+#define __sme_clr(x)           ((unsigned long)(x) & ~sme_me_mask)
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __MEM_ENCRYPT_H__ */