KVM: Add stat counter for hypercalls

Signed-off-by: Amit Shah <amit.shah@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h
index 90c80fd..935ffa4 100644
--- a/include/asm-x86/kvm_host.h
+++ b/include/asm-x86/kvm_host.h
@@ -328,6 +328,7 @@
 	u32 fpu_reload;
 	u32 insn_emulation;
 	u32 insn_emulation_fail;
+	u32 hypercalls;
 };
 
 struct descriptor_table {