From: Sean Christopherson <sean.j.christopherson@intel.com>
Date: Thu, 12 Sep 2019 19:46:06 -0700
Subject: KVM: x86/mmu: Revert "Revert "KVM: MMU: add tracepoint for
 kvm_mmu_invalidate_all_pages""
Git-commit: 14a3c4f498edac65ce2ff1f05d849cd72e886d78
Patch-mainline: v5.4-rc1
References: bsc#1164359

Now that the fast invalidate mechanism has been reintroduced, restore
the tracepoint associated with said mechanism.

Note, the name of the tracepoint deviates from the original tracepoint
so as to match KVM's current nomenclature.

This reverts commit 42560fb1f3c6c7f730897b7fa7a478bc37e0be50.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
---
 arch/x86/kvm/mmu.c      |  1 +
 arch/x86/kvm/mmutrace.h | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 6319f1e208f6..2ab0ac88d86e 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -5743,6 +5743,7 @@ static void kvm_zap_obsolete_pages(struct kvm *kvm)
 static void kvm_mmu_zap_all_fast(struct kvm *kvm)
 {
 	spin_lock(&kvm->mmu_lock);
+	trace_kvm_mmu_zap_all_fast(kvm);
 	kvm->arch.mmu_valid_gen++;
 
 	kvm_zap_obsolete_pages(kvm);
diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h
index e9832b5ec53c..1a063ba76281 100644
--- a/arch/x86/kvm/mmutrace.h
+++ b/arch/x86/kvm/mmutrace.h
@@ -282,6 +282,27 @@ TRACE_EVENT(
 	)
 );
 
+TRACE_EVENT(
+	kvm_mmu_zap_all_fast,
+	TP_PROTO(struct kvm *kvm),
+	TP_ARGS(kvm),
+
+	TP_STRUCT__entry(
+		__field(unsigned long, mmu_valid_gen)
+		__field(unsigned int, mmu_used_pages)
+	),
+
+	TP_fast_assign(
+		__entry->mmu_valid_gen = kvm->arch.mmu_valid_gen;
+		__entry->mmu_used_pages = kvm->arch.n_used_mmu_pages;
+	),
+
+	TP_printk("kvm-mmu-valid-gen %lx used_pages %x",
+		  __entry->mmu_valid_gen, __entry->mmu_used_pages
+	)
+);
+
+
 TRACE_EVENT(
 	check_mmio_spte,
 	TP_PROTO(u64 spte, unsigned int kvm_gen, unsigned int spte_gen),