[RFC PATCH v2 03/20] x86: Secure Memory Encryption (SME) build enablement

[Tom Lendacky]

Provide the Kconfig support to build the SME support in the kernel.

Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
---
 arch/x86/Kconfig |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c580d8c..131f329 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1357,6 +1357,15 @@ config X86_DIRECT_GBPAGES
 	  supports them), so don't confuse the user by printing
 	  that we have them enabled.
 
+config AMD_MEM_ENCRYPT
+	bool "Secure Memory Encryption support for AMD"
+	depends on X86_64 && CPU_SUP_AMD
+	---help---
+	  Say yes to enable the encryption of system memory. This requires
+	  an AMD processor that supports Secure Memory Encryption (SME).
+	  The encryption of system memory is disabled by default but can be
+	  enabled with the mem_encrypt=on command line option.
+
 # Common NUMA Features
 config NUMA
 	bool "Numa Memory Allocation and Scheduler Support"