KVM: MMU: Add tracepoint for guest page aging
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index 8abdc12..b17d49d 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -164,6 +164,28 @@
TP_printk("%s", __print_symbolic(__entry->load, kvm_fpu_load_symbol))
);
+TRACE_EVENT(kvm_age_page,
+ TP_PROTO(ulong hva, struct kvm_memory_slot *slot, int ref),
+ TP_ARGS(hva, slot, ref),
+
+ TP_STRUCT__entry(
+ __field( u64, hva )
+ __field( u64, gfn )
+ __field( u8, referenced )
+ ),
+
+ TP_fast_assign(
+ __entry->hva = hva;
+ __entry->gfn =
+ slot->base_gfn + ((hva - slot->userspace_addr) >> PAGE_SHIFT);
+ __entry->referenced = ref;
+ ),
+
+ TP_printk("hva %llx gfn %llx %s",
+ __entry->hva, __entry->gfn,
+ __entry->referenced ? "YOUNG" : "OLD")
+);
+
#endif /* _TRACE_KVM_MAIN_H */
/* This part must be outside protection */