KVM: VMX: Add instruction rdtscp support for guest

Before enabling, execution of "rdtscp" in guest would result in #UD.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 41777e6d9761..7f4e225feebf 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2914,6 +2914,11 @@ static bool svm_gb_page_enable(void)
         return true;
 }
 
+static bool svm_rdtscp_supported(void)
+{
+        return false;
+}
+
 static struct kvm_x86_ops svm_x86_ops = {
         .cpu_has_kvm_support = has_svm,
         .disabled_by_bios = is_disabled,
@@ -2982,6 +2987,8 @@ static struct kvm_x86_ops svm_x86_ops = {
         .gb_page_enable = svm_gb_page_enable,
 
         .cpuid_update = svm_cpuid_update,
+
+        .rdtscp_supported = svm_rdtscp_supported,
 };
 
 static int __init svm_init(void)