[PATCH 09/18] KVM: Move arm64's MMU notifier trace events to generic code

[Sean Christopherson]

Move arm64's MMU notifier trace events into common code in preparation
for doing the hva->gfn lookup in common code.  The alternative would be
to trace the gfn instead of hva, but that's not obviously better and
could also be done in common code.  Tracing the notifiers is also quite
handy for debug regardless of architecture.

Remove a completely redundant tracepoint from PPC e500.

Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
 arch/arm64/kvm/mmu.c             |  7 +---
 arch/arm64/kvm/trace_arm.h       | 66 --------------------------------
 arch/powerpc/kvm/e500_mmu_host.c |  2 -
 arch/powerpc/kvm/trace_booke.h   | 15 --------
 include/trace/events/kvm.h       | 66 ++++++++++++++++++++++++++++++++
 virt/kvm/kvm_main.c              | 10 +++++
 6 files changed, 78 insertions(+), 88 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 8711894db8c2..4b7e1e327337 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1111,7 +1111,6 @@ int kvm_unmap_hva_range(struct kvm *kvm,
 	if (!kvm->arch.mmu.pgt)
 		return 0;
 
-	trace_kvm_unmap_hva_range(start, end);
 	handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, &flags);
 	return 0;
 }
@@ -1141,8 +1140,6 @@ int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 	if (!kvm->arch.mmu.pgt)
 		return 0;
 
-	trace_kvm_set_spte_hva(hva);
-
 	/*
 	 * We've moved a page around, probably through CoW, so let's treat it
 	 * just like a translation fault and clean the cache to the PoC.
@@ -1173,7 +1170,7 @@ int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
 {
 	if (!kvm->arch.mmu.pgt)
 		return 0;
-	trace_kvm_age_hva(start, end);
+
 	return handle_hva_to_gpa(kvm, start, end, kvm_age_hva_handler, NULL);
 }
 
@@ -1181,7 +1178,7 @@ int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 {
 	if (!kvm->arch.mmu.pgt)
 		return 0;
-	trace_kvm_test_age_hva(hva);
+
 	return handle_hva_to_gpa(kvm, hva, hva + PAGE_SIZE,
 				 kvm_test_age_hva_handler, NULL);
 }
diff --git a/arch/arm64/kvm/trace_arm.h b/arch/arm64/kvm/trace_arm.h
index ff0444352bba..33e4e7dd2719 100644
--- a/arch/arm64/kvm/trace_arm.h
+++ b/arch/arm64/kvm/trace_arm.h
@@ -135,72 +135,6 @@ TRACE_EVENT(kvm_mmio_emulate,
 		  __entry->vcpu_pc, __entry->instr, __entry->cpsr)
 );
 
-TRACE_EVENT(kvm_unmap_hva_range,
-	TP_PROTO(unsigned long start, unsigned long end),
-	TP_ARGS(start, end),
-
-	TP_STRUCT__entry(
-		__field(	unsigned long,	start		)
-		__field(	unsigned long,	end		)
-	),
-
-	TP_fast_assign(
-		__entry->start		= start;
-		__entry->end		= end;
-	),
-
-	TP_printk("mmu notifier unmap range: %#016lx -- %#016lx",
-		  __entry->start, __entry->end)
-);
-
-TRACE_EVENT(kvm_set_spte_hva,
-	TP_PROTO(unsigned long hva),
-	TP_ARGS(hva),
-
-	TP_STRUCT__entry(
-		__field(	unsigned long,	hva		)
-	),
-
-	TP_fast_assign(
-		__entry->hva		= hva;
-	),
-
-	TP_printk("mmu notifier set pte hva: %#016lx", __entry->hva)
-);
-
-TRACE_EVENT(kvm_age_hva,
-	TP_PROTO(unsigned long start, unsigned long end),
-	TP_ARGS(start, end),
-
-	TP_STRUCT__entry(
-		__field(	unsigned long,	start		)
-		__field(	unsigned long,	end		)
-	),
-
-	TP_fast_assign(
-		__entry->start		= start;
-		__entry->end		= end;
-	),
-
-	TP_printk("mmu notifier age hva: %#016lx -- %#016lx",
-		  __entry->start, __entry->end)
-);
-
-TRACE_EVENT(kvm_test_age_hva,
-	TP_PROTO(unsigned long hva),
-	TP_ARGS(hva),
-
-	TP_STRUCT__entry(
-		__field(	unsigned long,	hva		)
-	),
-
-	TP_fast_assign(
-		__entry->hva		= hva;
-	),
-
-	TP_printk("mmu notifier test age hva: %#016lx", __entry->hva)
-);
-
 TRACE_EVENT(kvm_set_way_flush,
 	    TP_PROTO(unsigned long vcpu_pc, bool cache),
 	    TP_ARGS(vcpu_pc, cache),
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index ed0c9c43d0cf..648aefe1a3e7 100644
--- a/arch/powerpc/kvm/e500_mmu_host.c
+++ b/arch/powerpc/kvm/e500_mmu_host.c
@@ -723,8 +723,6 @@ int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
 
 static int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 {
-	trace_kvm_unmap_hva(hva);
-
 	/*
 	 * Flush all shadow tlb entries everywhere. This is slow, but
 	 * we are 100% sure that we catch the to be unmapped page
diff --git a/arch/powerpc/kvm/trace_booke.h b/arch/powerpc/kvm/trace_booke.h
index 3837842986aa..eff6e82dbcd4 100644
--- a/arch/powerpc/kvm/trace_booke.h
+++ b/arch/powerpc/kvm/trace_booke.h
@@ -69,21 +69,6 @@ TRACE_EVENT(kvm_exit,
 		)
 );
 
-TRACE_EVENT(kvm_unmap_hva,
-	TP_PROTO(unsigned long hva),
-	TP_ARGS(hva),
-
-	TP_STRUCT__entry(
-		__field(	unsigned long,	hva		)
-	),
-
-	TP_fast_assign(
-		__entry->hva		= hva;
-	),
-
-	TP_printk("unmap hva 0x%lx\n", __entry->hva)
-);
-
 TRACE_EVENT(kvm_booke206_stlb_write,
 	TP_PROTO(__u32 mas0, __u32 mas8, __u32 mas1, __u64 mas2, __u64 mas7_3),
 	TP_ARGS(mas0, mas8, mas1, mas2, mas7_3),
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index 49d7d0fe29f6..200eb7465530 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -462,6 +462,72 @@ TRACE_EVENT(kvm_dirty_ring_exit,
 	TP_printk("vcpu %d", __entry->vcpu_id)
 );
 
+TRACE_EVENT(kvm_unmap_hva_range,
+	TP_PROTO(unsigned long start, unsigned long end),
+	TP_ARGS(start, end),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	start		)
+		__field(	unsigned long,	end		)
+	),
+
+	TP_fast_assign(
+		__entry->start		= start;
+		__entry->end		= end;
+	),
+
+	TP_printk("mmu notifier unmap range: %#016lx -- %#016lx",
+		  __entry->start, __entry->end)
+);
+
+TRACE_EVENT(kvm_set_spte_hva,
+	TP_PROTO(unsigned long hva),
+	TP_ARGS(hva),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	hva		)
+	),
+
+	TP_fast_assign(
+		__entry->hva		= hva;
+	),
+
+	TP_printk("mmu notifier set pte hva: %#016lx", __entry->hva)
+);
+
+TRACE_EVENT(kvm_age_hva,
+	TP_PROTO(unsigned long start, unsigned long end),
+	TP_ARGS(start, end),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	start		)
+		__field(	unsigned long,	end		)
+	),
+
+	TP_fast_assign(
+		__entry->start		= start;
+		__entry->end		= end;
+	),
+
+	TP_printk("mmu notifier age hva: %#016lx -- %#016lx",
+		  __entry->start, __entry->end)
+);
+
+TRACE_EVENT(kvm_test_age_hva,
+	TP_PROTO(unsigned long hva),
+	TP_ARGS(hva),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	hva		)
+	),
+
+	TP_fast_assign(
+		__entry->hva		= hva;
+	),
+
+	TP_printk("mmu notifier test age hva: %#016lx", __entry->hva)
+);
+
 #endif /* _TRACE_KVM_MAIN_H */
 
 /* This part must be outside protection */
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 383df23514b9..d1de843b7618 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -459,6 +459,8 @@ static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
 	struct kvm *kvm = mmu_notifier_to_kvm(mn);
 	int idx;
 
+	trace_kvm_set_spte_hva(address);
+
 	idx = srcu_read_lock(&kvm->srcu);
 
 	KVM_MMU_LOCK(kvm);
@@ -478,6 +480,8 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
 	struct kvm *kvm = mmu_notifier_to_kvm(mn);
 	int need_tlb_flush = 0, idx;
 
+	trace_kvm_unmap_hva_range(range->start, range->end);
+
 	idx = srcu_read_lock(&kvm->srcu);
 	KVM_MMU_LOCK(kvm);
 	/*
@@ -548,6 +552,8 @@ static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn,
 	struct kvm *kvm = mmu_notifier_to_kvm(mn);
 	int young, idx;
 
+	trace_kvm_age_hva(start, end);
+
 	idx = srcu_read_lock(&kvm->srcu);
 	KVM_MMU_LOCK(kvm);
 
@@ -569,6 +575,8 @@ static int kvm_mmu_notifier_clear_young(struct mmu_notifier *mn,
 	struct kvm *kvm = mmu_notifier_to_kvm(mn);
 	int young, idx;
 
+	trace_kvm_age_hva(start, end);
+
 	idx = srcu_read_lock(&kvm->srcu);
 	KVM_MMU_LOCK(kvm);
 	/*
@@ -598,6 +606,8 @@ static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn,
 	struct kvm *kvm = mmu_notifier_to_kvm(mn);
 	int young, idx;
 
+	trace_kvm_test_age_hva(address);
+
 	idx = srcu_read_lock(&kvm->srcu);
 	KVM_MMU_LOCK(kvm);
 	young = kvm_test_age_hva(kvm, address);
-- 
2.31.0.291.g576ba9dcdaf-goog