On Mon, Aug 22, 2016 at 05:36:22PM -0500, Tom Lendacky wrote:
> Update the cpu features to include identifying and reporting on the
> Secure Memory Encryption feature.
>
> Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
> ---
> arch/x86/include/asm/cpufeature.h | 7 +++++--
> arch/x86/include/asm/cpufeatures.h | 5 ++++-
> arch/x86/include/asm/disabled-features.h | 3 ++-
> arch/x86/include/asm/required-features.h | 3 ++-
> arch/x86/kernel/cpu/scattered.c | 1 +
> 5 files changed, 14 insertions(+), 5 deletions(-)
...
> 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 },
If this is in scattered CPUID features, it doesn't need any of the
(snipped) changes above - you solely need to reuse one of the free
defines, i.e., something like this:
---
--- a/arch/x86/include/asm/cpufeatures.h 2016-09-02 15:49:08.853374323 +0200
+++ b/arch/x86/include/asm/cpufeatures.h 2016-09-02 15:52:34.477365610 +0200
@@ -100,7 +100,7 @@
#define X86_FEATURE_XTOPOLOGY ( 3*32+22) /* cpu topology enum extensions */
#define X86_FEATURE_TSC_RELIABLE ( 3*32+23) /* TSC is known to be reliable */
#define X86_FEATURE_NONSTOP_TSC ( 3*32+24) /* TSC does not stop in C states */
-/* free, was #define X86_FEATURE_CLFLUSH_MONITOR ( 3*32+25) * "" clflush reqd with monitor */
+#define X86_FEATURE_SME ( 3*32+25) /* Secure Memory Encryption */
#define X86_FEATURE_EXTD_APICID ( 3*32+26) /* has extended APICID (8 bits) */
#define X86_FEATURE_AMD_DCM ( 3*32+27) /* multi-node processor */
#define X86_FEATURE_APERFMPERF ( 3*32+28) /* APERFMPERF */
--- a/arch/x86/kernel/cpu/scattered.c 2016-09-02 15:48:52.753375005 +0200
+++ b/arch/x86/kernel/cpu/scattered.c 2016-09-02 15:51:32.437368239 +0200
@@ -37,6 +37,7 @@ void init_scattered_cpuid_features(struc
{ 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 }
};
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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