commit f36201e5f44b55faf44ddc820929548e51ec841b
author Xiao Guangrong <guangrong.xiao@linux.intel.com> Wed Sep 09 14:05:53 2015 +0800
committer Paolo Bonzini <pbonzini@redhat.com> Thu Oct 01 15:06:37 2015 +0200
tree c4332888778d124cffcade5ce08a5d40377c90ba
parent e2821620c0908593e6cb40f79c7e78b31921ed73

KVM: VMX: simplify rdtscp handling in vmx_cpuid_update()

if vmx_rdtscp_supported() is true SECONDARY_EXEC_RDTSCP must
have already been set in current vmcs by
vmx_secondary_exec_control()

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx.c

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 8f4c138..d53f57a 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -8677,16 +8677,15 @@
 	vmx->rdtscp_enabled = false;
 	if (vmx_rdtscp_supported()) {
 		exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
-		if (exec_control & SECONDARY_EXEC_RDTSCP) {
-			best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
-			if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
-				vmx->rdtscp_enabled = true;
-			else {
-				exec_control &= ~SECONDARY_EXEC_RDTSCP;
-				vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
-						exec_control);
-			}
+		best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
+		if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
+			vmx->rdtscp_enabled = true;
+		else {
+			exec_control &= ~SECONDARY_EXEC_RDTSCP;
+			vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
+					exec_control);
 		}
+
 		if (nested && !vmx->rdtscp_enabled)
 			vmx->nested.nested_vmx_secondary_ctls_high &=
 				~SECONDARY_EXEC_RDTSCP;