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

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Date:   Fri, 12 Jul 2019 10:54:39 +0800
From:   Wanpeng Li <kernellwp@...il.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>
Subject: [PATCH 1/2] KVM: LAPIC: Add pv ipi tracepoint

From: Wanpeng Li <wanpengli@...cent.com>

Add pv ipi tracepoint.

Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Radim Krčmář <rkrcmar@...hat.com>
Signed-off-by: Wanpeng Li <wanpengli@...cent.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