On 2/25/2017 9:29 AM, Borislav Petkov wrote:
On Thu, Feb 16, 2017 at 09:43:07AM -0600, Tom Lendacky wrote:
Add support for Secure Memory Encryption (SME). This initial support
provides a Kconfig entry to build the SME support into the kernel and
defines the memory encryption mask that will be used in subsequent
patches to mark pages as encrypted.
Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
...
+++ b/arch/x86/include/asm/mem_encrypt.h
@@ -0,0 +1,42 @@
+/*
+ * AMD Memory Encryption Support
+ *
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __X86_MEM_ENCRYPT_H__
+#define __X86_MEM_ENCRYPT_H__
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+
+extern unsigned long sme_me_mask;
+
+static inline bool sme_active(void)
+{
+ return (sme_me_mask) ? true : false;
return !!sme_me_mask;
Done.
Thanks,
Tom
