[PATCH 1/2] KVM: LAPIC: Add pv ipi tracepoint

[PATCH 1/2] KVM: LAPIC: Add pv ipi tracepoint

[Wanpeng Li]

From: Wanpeng Li <wanpengli@tencent.com>

Add pv ipi tracepoint.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
 arch/x86/kvm/lapic.c |  2 ++
 arch/x86/kvm/trace.h | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 3201d91..72c2a1e 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -568,6 +568,8 @@ int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low,
 	int cluster_size = op_64_bit ? 64 : 32;
 	int count = 0;
 
+	trace_kvm_pv_send_ipi(irq.vector, min, ipi_bitmap_low, ipi_bitmap_high);
+
 	irq.vector = icr & APIC_VECTOR_MASK;
 	irq.delivery_mode = icr & APIC_MODE_MASK;
 	irq.level = (icr & APIC_INT_ASSERT) != 0;
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index b5c831e..ce6ee34 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -1462,6 +1462,31 @@ TRACE_EVENT(kvm_hv_send_ipi_ex,
 		  __entry->vector, __entry->format,
 		  __entry->valid_bank_mask)
 );
+
+/*
+ * Tracepoints for kvm_pv_send_ipi.
+ */
+TRACE_EVENT(kvm_pv_send_ipi,
+	TP_PROTO(u32 vector, u32 min, unsigned long ipi_bitmap_low, unsigned long ipi_bitmap_high),
+	TP_ARGS(vector, min, ipi_bitmap_low, ipi_bitmap_high),
+
+	TP_STRUCT__entry(
+		__field(u32, vector)
+		__field(u32, min)
+		__field(unsigned long, ipi_bitmap_low)
+		__field(unsigned long, ipi_bitmap_high)
+	),
+
+	TP_fast_assign(
+		__entry->vector = vector;
+		__entry->min = min;
+		__entry->ipi_bitmap_low = ipi_bitmap_low;
+		__entry->ipi_bitmap_high = ipi_bitmap_high;
+	),
+
+	TP_printk("vector %d min 0x%x ipi_bitmap_low 0x%lx ipi_bitmap_high 0x%lx",
+		  __entry->vector, __entry->min, __entry->ipi_bitmap_low, __entry->ipi_bitmap_high)
+);
 #endif /* _TRACE_KVM_H */
 
 #undef TRACE_INCLUDE_PATH
-- 
2.7.4

[PATCH 2/2] KVM: X86: Add pv tlb shootdown tracepoint

[Wanpeng Li]

From: Wanpeng Li <wanpengli@tencent.com>

Add pv tlb shootdown tracepoint.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
 arch/x86/kvm/trace.h | 19 +++++++++++++++++++
 arch/x86/kvm/x86.c   |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index ce6ee34..84f32d3 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -1487,6 +1487,25 @@ TRACE_EVENT(kvm_pv_send_ipi,
 	TP_printk("vector %d min 0x%x ipi_bitmap_low 0x%lx ipi_bitmap_high 0x%lx",
 		  __entry->vector, __entry->min, __entry->ipi_bitmap_low, __entry->ipi_bitmap_high)
 );
+
+TRACE_EVENT(kvm_pv_tlb_flush,
+	TP_PROTO(unsigned int vcpu_id, bool need_flush_tlb),
+	TP_ARGS(vcpu_id, need_flush_tlb),
+
+	TP_STRUCT__entry(
+		__field(	unsigned int,	vcpu_id		)
+		__field(	bool,	need_flush_tlb		)
+	),
+
+	TP_fast_assign(
+		__entry->vcpu_id	= vcpu_id;
+		__entry->need_flush_tlb = need_flush_tlb;
+	),
+
+	TP_printk("vcpu %u need_flush_tlb %s", __entry->vcpu_id,
+		__entry->need_flush_tlb ? "true" : "false")
+);
+
 #endif /* _TRACE_KVM_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bc1688e..a7a0514 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2458,6 +2458,8 @@ static void record_steal_time(struct kvm_vcpu *vcpu)
 	 * Doing a TLB flush here, on the guest's behalf, can avoid
 	 * expensive IPIs.
 	 */
+	trace_kvm_pv_tlb_flush(vcpu->vcpu_id,
+		vcpu->arch.st.steal.preempted & KVM_VCPU_FLUSH_TLB);
 	if (xchg(&vcpu->arch.st.steal.preempted, 0) & KVM_VCPU_FLUSH_TLB)
 		kvm_vcpu_flush_tlb(vcpu, false);
 
-- 
2.7.4