Index: qemu-kvm/contents/kvm/include/linux/kvm.h
===================================================================
--- qemu-kvm.orig/contents/kvm/include/linux/kvm.h	2011-01-25 18:35:51.000000000 -0800
+++ qemu-kvm/contents/kvm/include/linux/kvm.h	2011-03-21 10:47:55.000000000 -0700
@@ -217,7 +217,7 @@
 		/* KVM_EXIT_MMIO */
 		struct {
 			__u64 phys_addr;
-			__u8  data[8];
+			__u8  data[16];
 			__u32 len;
 			__u8  is_write;
 		} mmio;