diff mbox

[RFC,v3,03/20] x86: Add the Secure Memory Encryption cpu feature

Message ID 20161110003459.3280.25796.stgit@tlendack-t1.amdoffice.net (mailing list archive)
State New, archived
Headers show

Commit Message

Tom Lendacky Nov. 10, 2016, 12:34 a.m. UTC 
Update the cpu features to include identifying and reporting on the
Secure Memory Encryption feature.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 arch/x86/include/asm/cpufeatures.h |    1 +
 arch/x86/kernel/cpu/scattered.c    |    1 +
 2 files changed, 2 insertions(+)


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Comments

Borislav Petkov Nov. 11, 2016, 11:53 a.m. UTC | #1 
On Wed, Nov 09, 2016 at 06:34:59PM -0600, Tom Lendacky wrote:
> Update the cpu features to include identifying and reporting on the

Here and for all other commit messages:

s/cpu/CPU/g

> Secure Memory Encryption feature.
> 

...
diff mbox

Patch

diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index b212b86..f083ea1 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -187,6 +187,7 @@ 
  * Reuse free bits when adding new feature flags!
  */
 
+#define X86_FEATURE_SME		( 7*32+ 0) /* AMD Secure Memory Encryption */
 #define X86_FEATURE_CPB		( 7*32+ 2) /* AMD Core Performance Boost */
 #define X86_FEATURE_EPB		( 7*32+ 3) /* IA32_ENERGY_PERF_BIAS support */
 
diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c
index 8cb57df..d86d9a5 100644
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -37,6 +37,7 @@  void init_scattered_cpuid_features(struct cpuinfo_x86 *c)
 		{ X86_FEATURE_HW_PSTATE,	CR_EDX, 7, 0x80000007, 0 },
 		{ X86_FEATURE_CPB,		CR_EDX, 9, 0x80000007, 0 },
 		{ X86_FEATURE_PROC_FEEDBACK,	CR_EDX,11, 0x80000007, 0 },
+		{ X86_FEATURE_SME,		CR_EAX, 0, 0x8000001f, 0 },
 		{ 0, 0, 0, 0, 0 }
 	};