KVM: Add fpu_reload counter

Measure the number of times we switch the fpu state.

Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 04efe88..a85c590 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -248,6 +248,7 @@
 	u32 irq_exits;
 	u32 host_state_reload;
 	u32 efer_reload;
+	u32 fpu_reload;
 };
 
 struct kvm_io_device {