kvm: nVMX: Don't validate disabled secondary controls

According to the SDM, if the "activate secondary controls" primary
processor-based VM-execution control is 0, no checks are performed on
the secondary processor-based VM-execution controls.
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx.c

@@ -10240,9 +10240,10 @@ static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
 	if (!vmx_control_verify(vmcs12->cpu_based_vm_exec_control,
 				vmx->nested.nested_vmx_procbased_ctls_low,
 				vmx->nested.nested_vmx_procbased_ctls_high) ||
-	    !vmx_control_verify(vmcs12->secondary_vm_exec_control,
-				vmx->nested.nested_vmx_secondary_ctls_low,
-				vmx->nested.nested_vmx_secondary_ctls_high) ||
+	    (nested_cpu_has(vmcs12, CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) &&
+	     !vmx_control_verify(vmcs12->secondary_vm_exec_control,
+				 vmx->nested.nested_vmx_secondary_ctls_low,
+				 vmx->nested.nested_vmx_secondary_ctls_high)) ||
 	    !vmx_control_verify(vmcs12->pin_based_vm_exec_control,
 				vmx->nested.nested_vmx_pinbased_ctls_low,
 				vmx->nested.nested_vmx_pinbased_ctls_high) ||