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

diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c
index ee96278..657a2b8 100644 (file)
--- 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 4253bca..9c0d4b5 100644 (file)
--- 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