Add a flag indicating whenever ENCLS[EUPDATESVN] SGX instruction
is supported. This will be used by SGX driver to perform CPU
SVN updates.
Signed-off-by: Elena Reshetova <elena.reshet...@intel.com>
---
arch/x86/include/asm/cpufeatures.h | 1 +
arch/x86/kernel/cpu/scattered.c | 1 +
tools/arch/x86/include/asm/cpufeatures.h | 1 +
3 files changed, 3 insertions(+)
diff --git a/arch/x86/include/asm/cpufeatures.h
b/arch/x86/include/asm/cpufeatures.h
index 6c2c152d8a67..ed0c0fa5822a 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -481,6 +481,7 @@
#define X86_FEATURE_AMD_HETEROGENEOUS_CORES (21*32 + 6) /* Heterogeneous Core
Topology */
#define X86_FEATURE_AMD_WORKLOAD_CLASS (21*32 + 7) /* Workload Classification
*/
#define X86_FEATURE_PREFER_YMM (21*32 + 8) /* Avoid ZMM registers due
to downclocking */
+#define X86_FEATURE_SGX_EUPDATESVN (21*32 + 9) /* Support for
ENCLS[EUPDATESVN] instruction */
/*
* BUG word(s)
diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c
index 16f3ca30626a..a7e1fcedca3c 100644
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -41,6 +41,7 @@ static const struct cpuid_bit cpuid_bits[] = {
{ X86_FEATURE_PER_THREAD_MBA, CPUID_ECX, 0, 0x00000010, 3 },
{ X86_FEATURE_SGX1, CPUID_EAX, 0, 0x00000012, 0 },
{ X86_FEATURE_SGX2, CPUID_EAX, 1, 0x00000012, 0 },
+ { X86_FEATURE_SGX_EUPDATESVN, CPUID_EAX, 10, 0x00000012, 0 },
{ X86_FEATURE_SGX_EDECCSSA, CPUID_EAX, 11, 0x00000012, 0 },
{ X86_FEATURE_HW_PSTATE, CPUID_EDX, 7, 0x80000007, 0 },
{ X86_FEATURE_CPB, CPUID_EDX, 9, 0x80000007, 0 },
diff --git a/tools/arch/x86/include/asm/cpufeatures.h
b/tools/arch/x86/include/asm/cpufeatures.h
index 6c2c152d8a67..ed0c0fa5822a 100644
--- a/tools/arch/x86/include/asm/cpufeatures.h
+++ b/tools/arch/x86/include/asm/cpufeatures.h
@@ -481,6 +481,7 @@
#define X86_FEATURE_AMD_HETEROGENEOUS_CORES (21*32 + 6) /* Heterogeneous Core
Topology */
#define X86_FEATURE_AMD_WORKLOAD_CLASS (21*32 + 7) /* Workload Classification
*/
#define X86_FEATURE_PREFER_YMM (21*32 + 8) /* Avoid ZMM registers due
to downclocking */
+#define X86_FEATURE_SGX_EUPDATESVN (21*32 + 9) /* Support for
ENCLS[EUPDATESVN] instruction */
/*
* BUG word(s)
--
2.45.2
