x86/hyper-v: Trace PV IPI send

Trace Hyper-V PV IPIs the same way we do PV TLB flush.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: devel@linuxdriverproject.org
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Tianyu Lan <Tianyu.Lan@microsoft.com>
Cc: "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>
Link: https://lkml.kernel.org/r/20180622170625.30688-5-vkuznets@redhat.com

2 files changed, 19 insertions, 0 deletions

diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c
index ee962784d25b..657a2b8c738a 100644
--- a/arch/x86/hyperv/hv_apic.c
+++ b/arch/x86/hyperv/hv_apic.c
@@ -31,6 +31,8 @@
 #include <asm/mshyperv.h>
 #include <asm/apic.h>
 
+#include <asm/trace/hyperv.h>
+
 static struct apic orig_apic;
 
 static u64 hv_apic_icr_read(void)
@@ -134,6 +136,8 @@ static bool __send_ipi_mask(const struct cpumask *mask, int vector)
         struct ipi_arg_non_ex ipi_arg;
         int ret = 1;
 
+        trace_hyperv_send_ipi_mask(mask, vector);
+
         if (cpumask_empty(mask))
                 return true;
 
diff --git a/arch/x86/include/asm/trace/hyperv.h b/arch/x86/include/asm/trace/hyperv.h
index 4253bca99989..9c0d4b588e3f 100644
--- a/arch/x86/include/asm/trace/hyperv.h
+++ b/arch/x86/include/asm/trace/hyperv.h
@@ -28,6 +28,21 @@ TRACE_EVENT(hyperv_mmu_flush_tlb_others,
                       __entry->addr, __entry->end)
         );
 
+TRACE_EVENT(hyperv_send_ipi_mask,
+            TP_PROTO(const struct cpumask *cpus,
+                     int vector),
+            TP_ARGS(cpus, vector),
+            TP_STRUCT__entry(
+                    __field(unsigned int, ncpus)
+                    __field(int, vector)
+                    ),
+            TP_fast_assign(__entry->ncpus = cpumask_weight(cpus);
+                           __entry->vector = vector;
+                    ),
+            TP_printk("ncpus %d vector %x",
+                      __entry->ncpus, __entry->vector)
+        );
+
 #endif /* CONFIG_HYPERV */
 
 #undef TRACE_INCLUDE_PATH