[PATCH] kvm:x86/svm: enable SVM lock if host supports it

[prasadjoshi.linux@gmail.com]

From: Prasad Joshi <prasadjoshi.linux@gmail.com>

SVM lock features allows software from preventing update to EFER.SVME.
Enable the SVM lock in guest if it is supported on host machine.

Signed-off-by: Prasad Joshi <prasadjoshi.linux@gmail.com>
---
 arch/x86/kvm/svm.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index e1b1ce2..fcdfdea 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4031,6 +4031,10 @@ static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
 		if (boot_cpu_has(X86_FEATURE_NRIPS))
 			entry->edx |= SVM_FEATURE_NRIP;
 
+		/* support SVM Lock if host supports it */
+		if (boot_cpu_has(X86_FEATURE_SVML))
+			entry->edx |= SVM_FEATURE_SVML;
+
 		/* Support NPT for the guest if enabled */
 		if (npt_enabled)
 			entry->edx |= SVM_FEATURE_NPT;
-- 
1.7.10.4