KVM: VMX: call vmx_load_host_state() only if msr is cached

No need to call it before each kvm_(set|get)_msr_common()

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index f482100..cc6e00a 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1007,9 +1007,9 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
                data = vmcs_readl(GUEST_SYSENTER_ESP);
                break;
        default:
-               vmx_load_host_state(to_vmx(vcpu));
                msr = find_msr_entry(to_vmx(vcpu), msr_index);
                if (msr) {
+                       vmx_load_host_state(to_vmx(vcpu));
                        data = msr->data;
                        break;
                }
@@ -1066,9 +1066,9 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
                }
                /* Otherwise falls through to kvm_set_msr_common */
        default:
-               vmx_load_host_state(vmx);
                msr = find_msr_entry(vmx, msr_index);
                if (msr) {
+                       vmx_load_host_state(vmx);
                        msr->data = data;
                        break;
                }