KVM: x86/mmu: Drop trace_kvm_age_page() tracepoint

Remove x86's trace_kvm_age_page() tracepoint.  It's mostly redundant with
the common trace_kvm_age_hva() tracepoint, and if there is a need for the
extra details, e.g. gfn, referenced, etc... those details should be added
to the common tracepoint so that all architectures and MMUs benefit from
the info.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210326021957.1424875-19-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/mmu/mmu.c

@@ -1502,7 +1502,6 @@ static int kvm_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
 	for_each_rmap_spte(rmap_head, &iter, sptep)
 		young |= mmu_spte_age(sptep);
 
-	trace_kvm_age_page(gfn, level, slot, young);
 	return young;
 }
 

arch/x86/kvm/mmu/tdp_mmu.c

@@ -981,8 +981,6 @@ static int age_gfn_range(struct kvm *kvm, struct kvm_memory_slot *slot,
 
 		tdp_mmu_set_spte_no_acc_track(kvm, &iter, new_spte);
 		young = 1;
-
-		trace_kvm_age_page(iter.gfn, iter.level, slot, young);
 	}
 
 	rcu_read_unlock();

include/trace/events/kvm.h

@@ -255,30 +255,6 @@ TRACE_EVENT(kvm_fpu,
 	TP_printk("%s", __print_symbolic(__entry->load, kvm_fpu_load_symbol))
 );
 
-TRACE_EVENT(kvm_age_page,
-	TP_PROTO(ulong gfn, int level, struct kvm_memory_slot *slot, int ref),
-	TP_ARGS(gfn, level, slot, ref),
-
-	TP_STRUCT__entry(
-		__field(	u64,	hva		)
-		__field(	u64,	gfn		)
-		__field(	u8,	level		)
-		__field(	u8,	referenced	)
-	),
-
-	TP_fast_assign(
-		__entry->gfn		= gfn;
-		__entry->level		= level;
-		__entry->hva		= ((gfn - slot->base_gfn) <<
-					    PAGE_SHIFT) + slot->userspace_addr;
-		__entry->referenced	= ref;
-	),
-
-	TP_printk("hva %llx gfn %llx level %u %s",
-		  __entry->hva, __entry->gfn, __entry->level,
-		  __entry->referenced ? "YOUNG" : "OLD")
-);
-
 #ifdef CONFIG_KVM_ASYNC_PF
 DECLARE_EVENT_CLASS(kvm_async_get_page_class,