[PATCH 5/5] KVM: PPC: BookE: Add some more trace points

[Alexander Graf <agraf@suse.de>]

Without trace points, debugging what exactly is going on inside guest
code can be very tricky. Add a few more trace points at places that
hopefully tell us more when things go wrong.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 arch/powerpc/kvm/booke.c    |    3 ++
 arch/powerpc/kvm/e500_tlb.c |    3 ++
 arch/powerpc/kvm/trace.h    |   71 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 52f6cbb..00bcc57 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -143,6 +143,7 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
                                        unsigned int priority)
 {
+	trace_kvm_booke_queue_irqprio(vcpu, priority);
 	set_bit(priority, &vcpu->arch.pending_exceptions);
 }
 
@@ -457,6 +458,8 @@ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 static void kvmppc_check_requests(struct kvm_vcpu *vcpu)
 {
 	if (vcpu->requests) {
+		trace_kvm_check_requests(vcpu);
+
 		if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu))
 			update_timer_ints(vcpu);
 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
diff --git a/arch/powerpc/kvm/e500_tlb.c b/arch/powerpc/kvm/e500_tlb.c
index 56bc92c..f5e531f 100644
--- a/arch/powerpc/kvm/e500_tlb.c
+++ b/arch/powerpc/kvm/e500_tlb.c
@@ -312,6 +312,7 @@ static inline void kvmppc_e500_ref_setup(struct tlbe_ref *ref,
 static inline void kvmppc_e500_ref_release(struct tlbe_ref *ref)
 {
 	if (ref->flags & E500_TLB_VALID) {
+		trace_kvm_booke206_ref_release(ref->pfn, ref->flags);
 		ref->flags = 0;
 	}
 }
@@ -1076,6 +1077,8 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr,
 
 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.h b/arch/powerpc/kvm/trace.h
index 9fab6ed..cb2780a 100644
--- a/arch/powerpc/kvm/trace.h
+++ b/arch/powerpc/kvm/trace.h
@@ -82,6 +82,21 @@ 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_stlb_inval,
 	TP_PROTO(unsigned int stlb_index),
 	TP_ARGS(stlb_index),
@@ -149,6 +164,24 @@ TRACE_EVENT(kvm_gtlb_write,
 		__entry->word1, __entry->word2)
 );
 
+TRACE_EVENT(kvm_check_requests,
+	TP_PROTO(struct kvm_vcpu *vcpu),
+	TP_ARGS(vcpu),
+
+	TP_STRUCT__entry(
+		__field(	__u32,	cpu_nr		)
+		__field(	__u32,	requests	)
+	),
+
+	TP_fast_assign(
+		__entry->cpu_nr		= vcpu->vcpu_id;
+		__entry->requests	= vcpu->requests;
+	),
+
+	TP_printk("vcpu=%x requests=%x",
+		__entry->cpu_nr, __entry->requests)
+);
+
 
 /*************************************************************************
  *                         Book3S trace points                           *
@@ -418,6 +451,44 @@ TRACE_EVENT(kvm_booke206_gtlb_write,
 		__entry->mas2, __entry->mas7_3)
 );
 
+TRACE_EVENT(kvm_booke206_ref_release,
+	TP_PROTO(__u64 pfn, __u32 flags),
+	TP_ARGS(pfn, flags),
+
+	TP_STRUCT__entry(
+		__field(	__u64,	pfn		)
+		__field(	__u32,	flags		)
+	),
+
+	TP_fast_assign(
+		__entry->pfn		= pfn;
+		__entry->flags		= flags;
+	),
+
+	TP_printk("pfn=%llx flags=%x",
+		__entry->pfn, __entry->flags)
+);
+
+TRACE_EVENT(kvm_booke_queue_irqprio,
+	TP_PROTO(struct kvm_vcpu *vcpu, unsigned int priority),
+	TP_ARGS(vcpu, priority),
+
+	TP_STRUCT__entry(
+		__field(	__u32,	cpu_nr		)
+		__field(	__u32,	priority		)
+		__field(	unsigned long,	pending		)
+	),
+
+	TP_fast_assign(
+		__entry->cpu_nr		= vcpu->vcpu_id;
+		__entry->priority	= priority;
+		__entry->pending	= vcpu->arch.pending_exceptions;
+	),
+
+	TP_printk("vcpu=%x prio=%x pending=%lx",
+		__entry->cpu_nr, __entry->priority, __entry->pending)
+);
+
 #endif
 
 #endif /* _TRACE_KVM_H */
-- 
1.6.0.2