KVM: Hoist kvm_mmu_reload() out of the critical section

vmx_cpu_run doesn't handle error correctly and kvm_mmu_reload might
sleep with mutex changes, so I move it above.
Signed-off-by: NShaohua Li <shaohua.li@intel.com>
Signed-off-by: NAvi Kivity <avi@qumranet.com>

drivers/kvm/vmx.c

@@ -1999,16 +1999,16 @@ static int vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 		kvm_guest_debug_pre(vcpu);
 
 again:
+	r = kvm_mmu_reload(vcpu);
+	if (unlikely(r))
+		goto out;
+
 	if (!vcpu->mmio_read_completed)
 		do_interrupt_requests(vcpu, kvm_run);
 
 	vmx_save_host_state(vcpu);
 	kvm_load_guest_fpu(vcpu);
 
-	r = kvm_mmu_reload(vcpu);
-	if (unlikely(r))
-		goto out;
-
 	/*
 	 * Loading guest fpu may have cleared host cr0.ts
 	 */